Fruit Wine Making Essay Example for Free

Fruit Wine Making Essay Grape is not the only fruit which we can make good-quality wine. Natives fruits such as cashew (kasoy), duhat, pineapple, guava, banana and bignay can be also processed into good wine. Other less familiar, yet excellent sources of wine are lipote, balubat and katuria. The lipote resembles the duhat, except for its round shape and black skin. Its white flesh become sweet when ripe and it also known as duhat matsing. Another native fruit, the balubat, is like siniguelas, green when unripe and reddish-orange when mature. It has white flesh with seeds like that of prunes and taste very sour even when ripe. The katurai is similar to the tiessa, green when unripe and yellow when ripe. Its flesh is yellow and sour with seeds like those of nangka. It is also have plenty of latex, a sticky juice. Preparation. The fruits should be sweet enough; otherwise, add cane sugar to the ingredients. Make sure the fruits are ripe and free from bruises and diseases. Wash the fruit very well and peel if necessary. Crush or mash to extract the juice. Use a fruit press or crush by hand and then strain the juice through a strong piece of cheesecloth. Add water twice the a month of the extracted juice, then add sugar if necessary. Pasteurization. Pasteurize the juice using the double boiler. This may consist of a kettle that can be placed within a much bigger kettle containing water. Prepare cheesecloth or any filter cloth, a spoon and a container for the pasteurized juice. Clean and sterilize all these boiling water before using. Filter the juice into the small boiler and place inside the bigger boiler. Put water in the bigger one up to the level of the juice. Heat the set-up at 63 degree Celsius for 30 minutes, or at 72 degree Celsius for 15 seconds. Gently stir while heating. afterwards, cool the juice immediately by exposing the container to cold running water. Stir the juice continuously, until sufficient cool. Add a pinch of baker’s yeast or commercial yeast preparation which is commonly sold in the grocery stores. Aging the wine. In a glass or enameled container, place the mixture and then cover with piece of cloth. after about 48 hours, transfer to a wooden barrel (preferably oak) or a demijohn (garapon). Plug holes with cotton and keep the barrel or container undisturbed in a darkquite place for about three months. After this period, heat the wine in a steam bath to a temperature of 50 degrees to 60 degree Celsius. Do this by exposing the container to steam. Add well-beaten eggwhite, about five cubic centimeters (cc) of eggwhite for every one liter of wine, stir and then cool. Filter the mixture and throw out the residue. Afterwards, heat the wine at 80 degree Celsius for 20 minutes. Make sure that the aged wine looks clear before putting in clean, sterilized bottles. Use a siphon to transfer the wine.

Design Of Wastewater Treatment Plant Environmental Sciences Essay

Design Of Wastewater Treatment Plant Environmental Sciences Essay Industrial wastewater treatment covers the mechanisms and processes used to treat waters that have been contaminated in some way by industrial or commercial activities prior to its release into the environment or its re-use. It involves mainly three stages, called primary, secondary and tertiary treatment. Activated sludge process can be used to treat the wastewater produces from Oushadi Ayurvedic Pharmaceuticals. Contaminants include oils, particulate solids, materials having high concentrations of biochemical oxygen demand (BOD) and suspended solids (SS). Primary treatment consists of temporarily holding the sewage ,where heavy solids can settle to the bottom while oil, grease and lighter solids float to the surface. The settled and floating materials are removed and the remaining liquid may be discharged or subjected to secondary treatment. One major problem faced by Oushadi was the complete removal of oil from wastewater and this posed a threat to the use of treated water for the ir boilers. Secondary treatment removes dissolved and suspended biological matter. Secondary treatment is typically performed by natural, water-borne micro-organisms in a managed habitat. Secondary treatment may require a separation process to remove the micro-organisms from the treated water prior to discharge or tertiary treatment. Tertiary treatment is sometimes defined as anything more than primary and secondary treatment. Comprising over 70% of the earths surface, water is undoubtedly the most precious natural resource that exists on our planet. Recycling of wastewater in industries is therefore a process, which is a necessity rather than a luxury. Wastewater treatment is the process of removing contaminants from wastewater. It includes physical, chemical, and biological processes to remove physical, chemical and biological contaminants. Its objective is to produce a waste stream (or treated effluent) and a solid waste or sludge suitable for discharge or reuse back into the environment. This material is often inadvertently contaminated with many toxic organic and inorganic compounds. Wastewater can cause contamination of ground water, lakes, streams and rivers. It wastes and decreases the amount of potable water available on earth, causes an imbalance in aquatic ecosystems and wastes the nutrients contained in wastewater by not recycling them. Many industries use large volumes of water in their manufa cturing operations. Because some of this water becomes contaminated, it requires treatment before discharge. Improvements in determining the effects of industrial waste discharges have led to the adoption of stringent environmental laws, which define the degree of treatment necessary to protect water quality. Discharge permits, issued under the National Pollutant Discharge Elimination System (NPDES), regulate the amount of pollutants that an industry can return to the water source. The permitted quantities are designed to ensure that other users of the water will have a source that meets their needs, whether these needs are for municipal water supply, industrial or agricultural uses, or fishing and recreation. Consideration is given to the feasibility of removing a pollutant, as well as the natural assimilative capacity of the receiving stream. This assimilative capacity varies with the type and amount of pollutant. Wastewater treatment plants are designed to convert liquid wastes into an acceptable final effluent and to dispose of solids removed or generated during the process. In most cases, treatment is required for both suspended and dissolved contaminants. Special processes are required for the removal of certain pollutants, such as phosphorus or heavy metals. Wastewater can be recycled for reuse in plant processes to reduce disposal requirements. This practice also reduces water consumption. Sahradaya College Of Engineering Technology, Kodakara 1 Design Of Wastewater Treatment Plant 1.1 POLLUTANTS IN WASTEWATER Organic Compounds The amount of organic material that can be discharged safely is defined by the effect of the material on the dissolved oxygen level in the water. Organisms in the water use the organic matter as a food source. In a biochemical reaction, dissolved oxygen is consumed as the end products of water and carbon dioxide are formed. Atmospheric oxygen can replenish the dissolved oxygen supply, but only at a slow rate. When the organic load causes oxygen consumption to exceed this resupply, thus dissolved oxygen level drops, leading to the death of fish and other aquatic life. Under extreme conditions, when the dissolved oxygen concentration reaches zero, the water may turn black and produce foul odours, such as the rotten egg smell of hydrogen sulphide. Organic compounds are normally measured as chemical oxygen demand (COD) or biochemical oxygen demand (BOD). Nutrients Nitrogen and phosphorus are essential to the growth of plants and other organisms. However, nitrogen compounds can have the same effect on a water source as carbon- containing organic compounds. Certain organisms use nitrogen as a food source and consume oxygen. Phosphorus is a concern because of algae blooms that occur in surface waters due to its presence. During the day, algae produce oxygen through photosynthesis, but at night they consume oxygen. Solids Solids discharged with a waste stream may settle immediately at the discharge point or may remain suspended in the water. Settled solids cover the bottom-dwelling organisms, causing disruptions in population and building a reservoir of oxygen-consuming materials. Suspended solids increase the turbidity of the water, thereby inhibiting light transmittance. Deprived of a light source, photosynthetic organisms die. Some solids can coat fish gills and cause suffocation. Sahradaya College Of Engineering Technology, Kodakara 2 Design Of Wastewater Treatment Plant Acids and Alkalies The natural buffering system of a water source is exhausted by the discharge of acids and alkalies. Aquatic life is affected by the wide swings in pH as well as the destruction of bicarbonate alkalinity levels. Metals Certain metals are toxic and affect industrial, agricultural, and municipal users of the water source. Metals can cause product quality problems for industrial users. Large quantities of discharged salts necessitate expensive removal by downstream industries using the receiving stream for boiler makeup water. The contaminants in wastewater are removed by physical, chemical and biological methods. The specific method are classified as physical unit operations, chemical unit processes and biological unit processes. 1.2 Unit Operations and Process in Wastewater Treatment TABLE 1.1 Operations and Process in Wastewater Treatment Contaminant Unit Operations/ Processes Classifications Suspended solids Screening Sedimentation Floatation Filtration Physical Biodegradable Organics Activated Sludge Trickling Filters Rotating Biological Contactors Biological Phosphorus Lime Coagulation Chemical Heavy Metal Chemical Precipitation Chemical Sahradaya College Of Engineering Technology, Kodakara 3 Design Of Wastewater Treatment Plant CHAPTER 2 WASTEWATER CHARACTERISTICS 2.1 WASTEWATER CHARACTERISTICS To design a treatment process properly, characterization of wastewater is perhaps the most critical step. Wastewater characteristics of importance in the design of a treatment process can be grouped into the following categories:  · Temperature  · pH  · Colour and Odour  · Carbonaceous substrates  · Nitrogen  · Phosphorous  · Chlorides  · Total and volatile suspended solids (TSS and VSS)  · Toxic metals and compounds  · Density  · Oil grease  · Alkalinity 2.1.1 Temperature: The temperature of wastewater is commonly higher than that of the local water supply, because of the addition of warm water from household activities. As the specific heat of water is much greater than that of air, the observed wastewater temperatures are higher than the local air temperatures during most of the year and are hotter only during the hottest summer months. Depending on the location and time of the year the effluent temperatures can either higher or lower than the corresponding influent values. 2.1.1.1 Effect of temperature The temperature of water is a very important parameter because of its effect on chemical reactions and reaction rates, aquatic life, and the suitability of the water for beneficial purposes. In addition, oxygen is less soluble in warm water than in cold water. The increases in rate of biochemical reactions that accompanies an increase in temperature, combined with the decrease in the quantity of oxygen present in surface waters, can often cause serious depletions in dissolved oxygen concentrations in summer months. Optimum temperatures for bacterial activity are in range from 25 to 35oC.Aerobic digestion and nitrification stops when the temperature rises to 50oC. When the temperature drops to about 15oC, methane producing bacteria become quite inactive and at about 5oC, the autotrophic nitrifying bacteria practically Sahradaya College Of Engineering Technology, Kodakara 4 Design Of Wastewater Treatment Plant cease functioning. At 2oC, even the chemo heterotrophic bacteria acting on carbonaceous material become essentially dormant. 2.1.2 pH: The hydrogen ion concentration is an important quantity parameter of both natural waters and wastewaters. The usual means of expressing the hydrogen ion concentration is as pH, which is defined as the negative logarithm of hydrogen ion concentration. The concentration range for the existence of most biological life is quite narrow and critical typically 6 to 9. Wastewater with a extreme concentration of hydrogen ion is difficult to treat by biological means, an if concentration is not altered before discharge, the wastewater effluent may alter the concentration in the natural waters. For treated effluents, discharged to the environment the allowed pH range usually varies from 6.5 to 8.5. The pH of fresh domestic waste water is slightly more than that of the water supply to the community. However, the onset of septic conditions may lower the pH while the presence of industrial wastes may produce extreme fluctuations. 2.1.3 ODOUR AND COLOUR: Fresh domestic waste water has slightly soapy and earthy odour and cloudy appearance depending upon its concentration, With the passage of time, the waste water becomes stale, darkening in colour with a pronounced colour due to microbial activity. 2.1.3.1 Odour: Odours are usually caused by gases produced by the decompositions of organic matter or by substances added to the waste water. Fresh wastewater has a distinctive, somewhat disagreeable odour which is less objectionable than the odour of wastewater which has undergone anaerobic decomposition. The most characteristic odour of stale or septic wastewater is hydrogen sulfide. Odours have been rated as the foremost concern of public relative to wastewater treatment facilities. Within the past few years, the control of odour has become major consideration in the design and operation of wastewater collection, treatment and disposal facilities, especially with respect to public acceptance of these facilities. Effect of Odours: The importance of odours at low concentrations in human terms is related primarily to psychological stress they produce rather than to the harm they do to the body. Offensive odours can cause poor appetite, lower water consumption, impair respiration, nausea and vomiting and mental perturbation. Some odorous compounds are toxic at elevated concentrations. Sahradaya College Of Engineering Technology, Kodakara 5 Design Of Wastewater Treatment Plant 2.1.3.2 Colour: Historically, the term condition was used along with composition and concentration was used to describe waste water. Conditions refer to the age of wastewater, which is determined qualitatively by its colour and odour. Fresh wastewater is usually a light brownish grey colour. However as the travel time in collection system increases, and more anaerobic conditions develop, the color of waste water changes sequentially from grey to dark grey and ultimately black . When the color of wastewater is black, the wastewater is described as septic . In most cases the grey , dark grey and black color of wastewater is due to formation of metallic sulphites which form as the sulphide produced under anaerobic conditions react with metals in the wastewater. 2.1.4 CARBONACEOUS CONSTITUENTS: Carbonaceous constituents are measured by BOD, COD or TOC analyses. While the BOD has been the common parameter to characterize carbonaceous material in wastewater, COD is becoming more common in most current comprehensive computer simulation design models. 2.1.4.1 Biochemical Oxygen demand: The BOD test gives a measure of the oxygen utilized by bacteria during the oxidation of organic material contained in a waste water sample. The test is based on the premise that all the biodegradable organic material contained in the wastewater sample will be oxidized to CO2 and H2O, using molecular of oxygen as the electron acceptor. Hence, it is a direct measurement of oxygen requirements and an indirect measure of biodegradable organic matter. 2.1.4.2 Chemical oxygen demand: The COD test is based on the principal that most organic compounds are oxidized to CO2 and H2O by strong oxidizing agents under acid conditions. The measurement represents the oxygen that would be needed for aerobic microbial oxidation, assuming that all organics are biodegradable. 2.1.4.3 Total Organic Carbon: The total carbon analyzer allows a total soluble carbon analysis to be made directly on an aqueous sample. In many cases TOC can be correlated with COD and occasionally with BOD values. Sahradaya College Of Engineering Technology, Kodakara 6 Design Of Wastewater Treatment Plant Table 2.1: Definition of Solids Found in Wastewater Test Description The residue remaining after a wastewater Total Solids (TS) Total Volatile Solids(TVS) sample has been evaporated and dried at a specified temperature (103-105oC). Those solids that can be volatilized and burned off when the TS are ignited (500 ±50 oC). oTotal Fixed Solids (TFS) The residue that remains after TS are ignited (500 ±50 C). Portion of the TS retained on a filter with a specified pore size, measured after being dried at a specified temperature (105oC). The Total Suspended Solids (TSS) Volatile Suspended Solids (VSS) Settle able Solids filter used most commonly for the determination of TSS is Whatman glass fiber filter which has a nominal pore size of about 1.58 µm. Those solids that can be volatilized and burned off when the TSS are ignited (500 ±50 oC). Suspended solids, expressed as mL/L, that will settle out of suspension with in a specified period of time. Sahradaya College Of Engineering Technology, Kodakara 7 Design Of Wastewater Treatment Plant CHAPTER 3 STAGES OF WASTEWATER TREATMENT 3.1 STAGES OF WASTEWATER TREATMENT 1) Preliminary Treatment: Removal of wastewater constituents such as rags, sticks, floatable grit and grease that may cause maintenance or operational problems with treatment operations, process and ancillary systems. 2) Primary treatment: Removal of a portion of suspended solids and organic matter from the wastewater. 3) Advanced Primary: Enhanced removal of suspended solids and organic matter from the wastewater typically accomplished by chemical addition to wastewater. 4) Secondary treatment : Removal of biodegradable organic matter (in solution or suspension) 5) Secondary with nutrient removal: Removal of biodegradable organics, suspended solids and nutrients. (N2, P or both N2 and P). 6) Tertiary treatment: Removal of residual suspended solids (after secondary treatment) usually by granular medium filtration or micro screens. Disinfection is also typically a part of tertiary treatment. Nutrient removal is often included in this definition. 7) Advanced Tertiary: Removal of dissolved and suspended materials remaining after normal biological treatment when required for various water reuse applications. 3.2TREATMENT PROCESS FLOWSHEET: Depending on the contaminants to be removed, an almost limitless number of process combinations can develop using the unit operations and process. The term flow sheet is used to describe particular combinations of unit operations and process used to achieve a specific treatment objective. Apart from the analysis of the technical feasibility of the individual treatment methods, the exact flow-sheets configuration will depend on factors such as (1) the needs of the of the clients needs, (2) the designers past experience, (3) regulatory agency policies on the application of specific treatment methods, (4) the availability of equipment suppliers, (5) what use can be made of existing facilities, (6) the availability of qualified operating personnel, (7) initial construction costs and (8) future operation and maintenance costs. Sahradaya College Of Engineering Technology, Kodakara 8 Design Of Wastewater Treatment Plant The Process Flow Sheet proposed in this project for the wastewater treatment is as shown below : Figure 3.1: Process Flow Sheet Table 3.1: LEVELS OF WASTEWATER TREATMENT TREATMENT LEVEL DESCRIPTION Removal of wastewater constituents Such as Preliminary rags,sticks, floatables,grit and grease that may cause maintenance or operational problems with the treatment operations. Primary Removal of apportion of the suspended solids and organic matters from wastewater. Enhanced removal of suspended solids and Advanced Primary organic matters from wastewater typically accomplished by chemical addition or filtration. Secondary Removal of biodegradable matters and suspended solids Secondary with Nutrient removal Removal of biodegradable organics and nutrients. Tertiary Removal of residual suspended solids usually by granular medium filtration or micro screen Sahradaya College Of Engineering Technology, Kodakara 9 Design Of Wastewater Treatment Plant CHAPTER 4 LITERATURE REVIEW 4.1 SCREENING The first unit operation generally encountered in wastewater is screening. A screen is a device with opening, generally of uniform size, that is used to retain solids found in the influent wastewater to the treatment plant. The principle role of screening is to remove coarse material from the flow stream that could damage subsequent process equipment, reduce overall treatment process reliability and effectiveness and contaminate waterways. Fine screens are sometimes used in place of or following coarse screens where greater removal of solids are required to protect process equipment and eliminate materials that may inhibit the beneficial reuse of bio-solids. All aspects of screening, removal, transport and disposal must be considered in the application of screening devices including 1. The degree of screening removal required, because of potential effects of downstream processes 2. Health and safety of operators as screenings contain pathogenic organism that attract insects 3. Odour potential 4. Requirements for handling transport and disposal 5. Disposal options Two general types of screens, coarse screens and fine screens are used in preliminary treatment of wastewater. Coarse screens have clear opening ranging from 6 -150mm, Fine screens have openings ranging less than 6mm. Micro screens will generally have screen opening less than 50 µ m, are used principally in removing fine solids from treated effluents. Bar rack for the removal of coarse solids. 4.2 GRIT REMOVAL Removal of grit from wastewater may be accomplished in grit chambers or by the centrifugal separation of solids. Grit chambers are designed to remove grit, consisting of sand, gravels, cinders or other heavy solid materials that have subsiding velocities of specific gravities substantially greater than those of the organic putrescible solids in wastewater. Grit chamber are most commonly located after the bar screen and before the primary sedimentation tanks. Sahradaya College Of Engineering Technology, Kodakara 10 Design Of Wastewater Treatment Plant Locating grit chamber ahead of wastewater pump when desirable, would involve placing them at considerable depth at added expense. It is therefore deem more economical to pump the wastewater, including the grit to grot chamber located at a convenient position ahead of the treatment plant units, recognising that pumps may require greater maintenance. 4.2.1 Why Grit is removed?  · Prevent wear on pumps  · Accumulation in clarifiers  · Accumulation in aeration tank  · Accumulation in digesters  · Clogging of sludge piping 4.2.2 TYPES OF GRIT CHAMBERS Grit chambers are provided to (1) Reduce formation of heavy deposits in pipelines, channels and conduits (2) reduce the frequency of digester cleaning caused by excessive accumulation of grit (3) Protect moving mechanical equipment from abrasion and accompanying abnormal wear. There are three general type of grit chamber: Horizontal flow either rectangular or square configuration; aerated or vortex type. The aeration type consists of a spiral flow aeration tank where the spiral velocity is induced and controlled by the tank dimension in and quantity if air supplied to the unit. The vortex type consists of cylindrical tank, in which the flow enter tangentially vortex flow pattern; centrifugal and gravitational forces causes the grit to separate. Design of grit chamber is commonly based on removal of grit particles having a specific gravity of 2.65 and wastewater temperature 15.5oC. However analysis of grit removal data indicates the specific gravity ranges from 1.3-2.7. Horizontal Flow Grit Chambers In the horizontal flow type the flow passes through the chamber in a horizontal direction and the straight line velocity of flow is controlled by the dimension of the unit, an effluent distribution gate and a weir at the effluent end. Rectangular and square Horizontal flow grit chambers have been used for many years. Sahradaya College Of Engineering Technology, Kodakara 11 Design Of Wastewater Treatment Plant Typical Design Information for Horizontal Flow Grit Chamber Table 4.1 Item Detention time Horizontal velocity Settling velocity for removal of .21mm material Settling velocity for removal of .15mm material SI Unit Range Typical s 45-90 60 m/s .25-.4 .3 m/min 1-1.3 1.15 m/min .6-.9 .75 % 30-40 36 % 25-50 30 Head loss in a control section as % depth in channel Added length allowance for inlet and outlet turbulence Horizontal- Velocity Grit Chambers: They are controlled by either a  · Parshall flume  · Proportional weir Parshall fume is used more widely due to less head loss than the weir. The flume and weir are also used to measure flow rates. In the chamber, a constant horizontal velocities is maintained by proper cross-sectional geometry of the chamber.  · Horizontal velocity must be adequate to keep the organic matter in suspension.  · Horizontal velocities should be sufficient so as to prevent scouring of settled grit along the bottom of the channel. Values of .23-.38m/s are common. 4.3 FLOW EQUALIZATION Process for water treatment works best with uniform conditions. Shock to the bioprocesses in the form of sudden change in the concentration of nutrients can upsets. If the concentrations or flow rates of the waste vary greatly, dosages for treatment must be constantly be readjusted. Flow equalization is a method used to overcome the operational problems caused by flow rate variation, to improve the performance of downstream process, and to reduce the size and cost of t downstream treatment facilities. Flow equalisation is damping of flow rate variations to achieve a constant or nearly constant flow rate and can be applied in a number of different situations depending on characteristics of collection system. There may be aeration both to keep the fluid from becoming anaerobic and smelly and to biodegrade some of the organic compound present. Sahradaya College Of Engineering Technology, Kodakara 12 Design Of Wastewater Treatment Plant The principle applications are for the equalisation of: 1. Dry weather flow to reduce the peak flow and loads. 2. Wet weather flow in sanitary collection systems experiencing inflow and infiltration. 3. Combined storm water and sanitary system flows. In the line arrangement all of flow passes through equalisation basin. This arrangement can be used to achieve considerable amount of concentration and limits its divert into equalisation basin. Although the pumping requirements are reduced in this arrangement, the amount of constituents concentration damping is considerably reduced. The principle benefits that are cited as derived from application of flow equalisation are: 1. Biological treatment is enhanced, because shock loadings are eliminated or minimised, inhibiting substances can be diluted and pH can be stabilised. 2. The effluent quality and thickening performance of secondary sediment tank following biological treatment is improved consistency in solid loading. 3. Effluent filtration surface area requirements are reduced, filtered performance is improved and more uniform filter back wash cycles are possible by lower hydraulic loading. 4. In chemical treatment, damping of mass loading improves chemical feed control and process reliability. 5. Often the rest of the plant designed with a smaller equipment( less capital investment) because of this improvement in performance. Disadvantage of flow equalisation include  · Relatively large land areas are required.  · Equalisation facilities may have to be covered for odour control near residential area.  · Additional operation and maintenance required  · Capital cost is increased. 4.4 PRIMARY SEDIMENTATION The objective of treatment by sedimentation is to remove readily settle able solids and floating materials and thus reduce the suspended solids content. Primary sedimentation is used as a preliminary step in the further processing of the waste water. Efficiently designed and operated primary sedimentation tanks should remove from 50-70% of the suspended solids and from 25-40% of the BOD. Sedimentation tanks have also been used as storm water retention tanks which are designed to provide a moderate detention period (10-30mins) for overflows from either combined sewers and storms sewers. The purpose of sedimentation is to remove a substantial portion of organic solids that otherwise would be discharged directly to the receiving waters. Sedimentation tanks have also been used to provide detention periods sufficient for effective disinfection of such overflows. Sahradaya College Of Engineering Technology, Kodakara 13 Design Of Wastewater Treatment Plant 4.4.1DESCRIPTION Almost all treatment plants are mechanically cleaned sedimentation tanks of standardized circular or rectangular design. The selection of the type of sedimentation unit for a given application is governed by the size of the installation, by rules and regulations of local control authorities, by local site conditions and by the experience and judgment of the engineer. Two or more tanks have to be provided so that the process may remain in operation when one tank is out of service for maintenance and repair work. RECTANGULAR TANKS Rectangular sedimentation tanks may use either chain and flight solids collectors or travelling bridge type collectors. The solids settling in the tank are scraped solids hoppers in small tanks and transfers troughs in large tanks. In every long unit two collection mechanisms can be used to scrape solids to collection points near the middle of the tank length. Where possible, it is desirable to locate solids pumping facilities close to the collection hoppers. 4.4.2 SEDIMENTATION TANK PERFORMANCE The efficiency of sedimentation basins with respect to removal of BOD and TSS is reduced by 1. Eddy currents formed by inertia of incoming fluid 2. Wind induced circulation cells formed in uncovered tanks 3. Thermal convection currents BOD AND TSS REMOVAL R= Where R expected removal efficiency t- detention time a, b empirical constants 4.4.3 DETENTION TIME The bulk of finely divided solids reaching primary sedimentation tanks is incompletely flocculated but is susceptible to flocculation. Flocculation is aided by eddying motion of the fluid within tanks and proceeds through the coalescence of fine particles at a rate that is a function of their concentration and of the natural ability of the particles to coalesce upon collision. Coalescence of a suspension of solids becomes more complete as time elapses, thus detention time is a consideration in the design of sedimentation tank. Normally primary sedimentation tanks are designed, to provide 1.5-2.5hrs of detention based on the average rate of waste water. Sahradaya College Of Engineering Technology, Kodakara 14 Design Of Wastewater Treatment Plant 4.4.4 SCOUR VELOCITY To avoid the resuspension or stirring of resuspended particles horizontal velocity through the tank should be kept considerably low. The following equation gives critical velocity. ( ) VH=[ ] Where VH Horizontal velocity that will just produce scour, LT-1 (m/s) K Constant that depends on type of material being scoured s Specific Gravit

The Birthmark by Nathaniel Hawthorne Essays -- English Literature

First Paper - The Birthmark by Nathaniel Hawthorne As human beings, we are NOT perfect! It is part of our nature to be flawed one way or another. But there are some who choose to believe the opposing view. The theme of Nathaniel Hawthorne's short story "The Birthmark" is how humans fight forcefully against Nature for perfection. It is those humans who, eventually, learn that Nature cannot be changed or revised. Aylmer was a famous scientist and philosopher who achieved great wonders. All his life, he has made remarkable discoveries and won numerous awards. His life revolved around two deep passions - the love for Nature [perfection] and the love for his wife, Georgiana [imperfection]. He believes the world is perfect, but little does he realize his life is rather imperfect. Georgiana is a very beautiful woman who loved her husband dearly. She was indeed beautiful with the exception of one flaw - her birthmark. This single mark lied on her left white cheek that resembled the shape of a hand. This mark is known as the "crimson hand". Her beauty is imperfect because of this "fatal mark". Although this beauty mark hindered Georgiana's beauty in Aylmer's eyes, others don't see this point. Other people, such as Aminadab, feel that she is beautiful with or without the "fatal birthmark". Aylmer was always bothered by her birthmark. Everyday, he goes hysterical over his wife's birthmark. As a successful scientist who has accomplished anything and everything, he decides to remove Georgiana's "fatal mark". He mixes up a concoction which will remove her birthmark. He realizes that the concoction is dangerous, yet he proceeds with his task in hope to remove her "fatal mark". His potion, known as the "elixir o... ...is wife's life. Knowing that the concoction is dangerous, he proceeds with it instead of accepting his wife's beauty. He took his wife's beauty for granted and he paid for his consequences. In a sense, Nature is just like fate. It has been already set up and there is no point to try to change it. Nature cannot be changed and shouldn't be attempted to be changed. Of course, there are always consequences in trying to change something that has already been set up. The more one tries to alter Nature, the more they will hurt themselves and others around them. In another sense, Nature is like God. Nature is similar to God because it is a concept one must comprehend. Nobody can take the place of God and the same mentality should be understood for Nature as well. Nature cannot be changed nor can God be replaced. Nature and God are things one can just accept.

Eulogy for Father :: Eulogies Eulogy

Eulogy for Father On behalf of my entire family, I want to thank all of you for your compassion and for being present here today. For those of you who don't know me, my name is Mauri-Lynne, and I'm Lionel's daughter. Dad was devoted to every one of you. We all hope that you'll share your memories of him with us, if not today then in the weeks and months to come. My father was committed to the practice and preservation of Jewish life. His religious beliefs informed everything he did. Particularly fond of traditional music, he and I spent many hours listening to the treasured recordings he'd collected over the years. We spoke regularly about our spiritual and communal responsibility as Jews, particularly our responsibilities to G-d. Jewish mystics explain that before manifest creation, everything that ever would be was contained within the Creator as pure potentiality. This field without end created vessels through which its divine energy could pass and differentiate, each representing a specific attribute, such as wisdom, compassion, kindness and strength. The energy being transmitted was so powerful that the vessels shattered. It is said that some of these shattered pieces of divine energy fell to earth as sparks where they have remained all these eons. He and I believe that one of our primary responsibilities to G-d is to repair the world. In Hebrew, we call this process tikkun olam. We accomplish this by performing prescribed mitzvot or good works. We believe that every mitzvah or honorable act, raises those divine sparks. Traditional teachings state that when the repair is complete, we usher in the Messianic Age. Of the many mitzvot, performing acts of loving-kindness, or chesed, is considered one of the most important. No one understood this religious obligation more clearly than my father; it was one of his primary life directives. Each of you is here today because you've experienced my father's kindness, concern and generosity in some way. Several months ago, when I couldn't sleep, I turned on late-night TV and watched the songwriter/singer, Billy Joel, entertaining a college audience. Someone asked about a particular song, and he answered it was written in response to a question his young daughter had asked about death. She wanted to know where people went when they died. He answered that they go into the hearts of the people who loved them. Just look into the eyes of the people sitting all around you.

Domestic Violence Essay

Domestic Violence is one of the many social issues that society is faced with. Research has it that the female group is the one that becomes victimized the most and there are several strategies that have been put into place to culminate this issue of violence at home, more especially against women. One of the strategies that have been introduced in fighting domestic violence in South Africa is the Domestic Violence Act of 1998. Although this Act is one of the good moves by the government, it has many shortcomings. This essay will therefore discuss critically domestic violence and how the Domestic Violence Act is not sufficient to protect women in South Africa from violence at the hands of their abusers To begin with, South African government refers domestic violence to any incident of threatening behaviour, violence or abuse (psychological, physical, sexual, financial or emotional) between adults who are or have been intimate partners or family members, regardless of gender or sexual ity; and in the (South Africa) constitution enacted is an Act which aims â€Å"to provide for the issuing of protection orders with regard to domestic violence; and for matters connected therewith† which is the Domestic Violence Act, 1998 (Act No. 116 of 1998). There are several good points about this Act, and primary to those is that people (especially women and children) to some extent are protected from the deliberate abuse at home. However, many are the shortcomings of this Act. For instance, the exact statistics concerning domestic violence are extremely difficult to obtain hence it becomes difficult to know how much the Act is working. Domestic violence is not a crime as such, and police statistics reflect only reported crimes, such as assault, rape or malicious damage to property, and so forth. In some instances, domestic violence is not reported by the victims because of several reasons. There are many actions that constitute domestic violence that are not defined as crimes, such as forced isolation, verbal abuse, stalking and economic abuse. Domestic violence is often not just a one-off event, but a series of events, or a continuous pattern of abuse. Domestic violence may also exist as a continuum with one serious violent incident at one end, to ongoing and multiple abuses at the other. This pattern of abuse is not recognized in South African criminal law, which tends to isolate individual incidents. In addition, as outlined by Bollen et.al (1999).most crimes of domestic  violence are not reported to the police for fear of intimation, shame, and fear of not being believed, self-blame, or fear of retaliation. Furthermore, it appears from studies and work by organizations offering support to victims that the incidence of domestic violence is very high in South Africa. Community based studies have revealed that in some areas almost a quarter of women report having being abused in their life times by a current or ex-partner, and that up to a half are affected by emotional or financial (Jewkes et.al, 1999). A survey of 269 women who had contacted helping agencies in three major cities found emotional or physical abuse to be the most prevalent form of domestic violence experienced by women, with 90 percent of the sample having experienced this abuse (Bollen et al, 1999). The Domestic Violence Act (Act 116) was introduced in 1998 with the aim of affording women protection from domestic violence by creating obligations on law enforcement bodies to protect women (victims) as far as is possible. The Act sets out a broad range of behaviours that constitute domestic violence; including physical, sexual, verbal, emotional and psychological abuse, stalking, intimidation, harassment, malicious damage to property, unauthorized access to the complainant’s property, as well as other forms of controlling behaviour which may cause harm to the safety, health or wellbeing of the complainant. The Act also extends the notion of ‘domestic relationship’, affording to protection to married couples; same-sex relationships; couples who are (or were) in a dating, engagement or customary relationship, including an actual or perceived relationship; any person in an intimate relationship; parents of a child; and people who do or have recently shared a residence. The Domestic Violence Act allows a complainant to apply to court for a protection order asking for relief or protection. An interim order may be granted, and after an enquiry, a final order may be granted against a respondent. The protection order may prohibit the respondent from committing any act of domestic violence; from entering a specified place; or from committing an act set out in the order. A warrant of arrest is issued simultaneously with the order, and brought into effect if the complainant reports that the respondent has breached any provision of the order. If he or she is found guilty of a contravention, then the court may convict the respondent and sentence him or her to a fine or a term of imprisonment. In terms of the Act, no prosecutor is permitted to refuse to  institute an action, or to withdraw a charge unless authorized by the Director of public prosecution (Dissel & Ngubeni, 2003). Another of the other very serious shortcoming of this Act is that, while the Act criminalizes the breach of an order, it does not create an offence of domestic violence (Dissel & Ngubeni). Where the offender commits an act that is recognized by the criminal law as a criminal offence, a woman can report the case to the police, and it may proceed to a criminal trial but if it is not recognized, then there is nothing to be done. In conclusion, the Act is an indication of the seriousness with which domestic violence is now viewed in South Africa. It offers one form of protection to women who are the victims of domestic violence, but it does not necessarily offer remedies to the problem. The essay has outlined that sometimes the reason why domestic violence is so prevalent is due to the fear of shame and not being believed. The recommendation therefore is that there should be trained personnel who understand clearly the domestic violence issue, persons who understand of such related issue s and that will enable the victims to talk freely so as to reveal everything. References Bollen, S., Artz, L., Vetten, L., Louw, A. (1999). Violence Against Women in Metropolitan South Africa: A study on impact and service delivery. Institute for Security StudiesMonograph Series No 41, September 1999. http://www.iss.co.za/Pubs/Monographs/No41/Contents.html. Retrieved 8 October 2013 Dissel, A & Ngubeni, K. (2003).Giving Women their voice: Domestic Violence and Restorative Justice in South Africa. CSR: Paper presented at the XIth International Symposium on Victimology, Stellenbosch, July 2003. Jewkes, R., Penn-Kekana, L., Levin, J., Ratsaka, M., Schreiber, M. (1999). â€Å"He must giveme money, he mustn’t beat me†: Violence against women in three South African provinces. Pretoria: CERSA (Women’s Health) Medical Research Council

Impact of Social Network on the Language Essay

The impact of social network in language English to teenagers Nowadays, social network is very popular especially to teenagers. It makes communication faster and more convenient. Examples for social networks are facebook, twitter, MSN, Xanga and so on. People communicate through languages, and there are good and bad impacts on language English that caused by social networks. I will explain my views in my presentation later on. First of all I would like to talk about the good impacts first. Teenagers tend to have more chance to communicate in English through using social networks. It is because typing or texting in English is much more easier and faster than in Chinese. Therefore, teenagers prefer to type in English. And that will definitely improve their writing and reading skill when they get more chance to communicate in English. Moreover, due to the problem that some teenagers are not confident enough to talk in English, so that communicate more in English through social media will not only develop teenager’s writing and reading skill it will also make teenagers have more confident to talk to people face to face in English when they have developed skills. However, there are still some bad impacts. Some people might claim that chatting through social networks or online might reduce teenager’s ability to write. It is because teenagers might develop some short forms when communicating through social network. For example, they prefer using letter c, u and tmr to represents see you tomorrow, or use letter b and number 4 to represents the word before. I agree that the use of those short forms is really convenient and can communicate faster, but if teenagers used to communicate by those short forms, and they might accidentally use it in their school works or other formal writings, which is not acceptable. In addition, some teenagers think that using those short forms to communicate are a symbol of â€Å"young generation† and its cool which makes them prefer to use those short forms to communicate rather than the old and formal one. Lastly, after talking about both good and bad impacts of social networks to language English of teenagers, we can see that, to have bad or good impact is depend on the teenagers. It is because there are both good and bad consequences, when teenagers communicate through social networks it will improve their ability of writing and reading. However, if they rely or used to communicate in the way they communicate through social networks it will then reduce the ability of writing formal works. Therefore, teenagers should learn to balance the use of social network and try not to cause bad consequences.

Qualitative Study of Reasons for (Non) Participation in Physical Recreation Essay

The objective of this qualitative study is to investigate and compare the responses of single and married women that do not participate in physical recreation. Lack of physical activity from married and single women has been studied less extensively than men’s physical activity. (Vehoef, Love & Rose 2003) The issue of non-participation in physical activity can affect the quality of life and health of women globally. It is important to address this issue and understand why some women do not participate in leisure activities. The qualitative research in this report discusses the major themes or reasons for non-participation from women and compares these themes between married and single women. Firstly this report will give a brief review of some previous research in this field mainly the reasons for not participating in physical activity. Secondly this report will give a short description of the research method used to gather the data for the quantitative research and thirdly it will discuss and describe the major reason for the non-participation in physical recreation of married and single women. Part 1b) Literature Review There has been some research on the topic of non-participation of women in physical recreation. Married women have less time to participate in physical activity due to work are childbearing responsibilities. (Nomaguchi & Bianchi 2004) These days there are a lot more women working full time. Furthermore these women are working longer hours per day. (Nomaguchi & Bianchi 2004) With longer working days women are spending less time doing recreational activity. Women are not motivated to spend their only free time exercising a lot would much prefer to relax and forget about work. Work and study along with other issues like family responsibilities are the main reasons that some married and single women are not involved in physical activity. (Erickson & Gillespie 2000) One of the main reason for non-participation for married women is family and their role in the family. (Nomaguchi & Bianchi 2004) The majority of married women are working full time and caring for children. (Nomaguchi & Bianchi 2004) Having a full time job and being a mother takes up a very large amount of time in ones day. After finishing a long work day and then tending to the needs of children such as transportation and hunger it does not leave very much time for a woman to exercise. A busy schedule like this can be very mentally tiring and motivation to perform physical activity can decrease. Research shows that after all her work and family responsibilities are finished it is usually too late to start to exercise or they are simply too exhausted. This can affect the health and quality of life for a woman. (Nomaguchi & Bianchi 2004) Single women have issues finding time to participate in physical activity. They may not have kids to look after in some cases but work and study issues can limit their time for exercise. Middle aged single women are slightly more active than married women the same age but the overall participation rate is small. (Vehoef, Love & Rose 2003) This small participation rate of married and single women is a concern for society with health issues such as obesity and depression increasing. Part 2) Research Methods The research methods used in this study were In-depth interviews. A number of interview were conducted with married and single women. In-depth interviews are primarily used when the number of subjects is rather small. The advantage of using a in-depth interview in a quantitative study is that it is an unstructured process that allows the interviewer to gain more depth of answers when compared to a questionnaire. The informal structure gives the freedom of the interviewer to change the direction of the interview and engage with the interviewee much more personally, this allows more extensive and detailed data. (Kwek 2011) It is important when conducting a in-depth interview to not lead the interviewee but to probe them for more information. The person conducting the interview must not agree with of disagree with the interviewee this is vital so the interviewee does not feel induced into to answering a question in a certain way. The interviewer must use more open questions to gain more in-depth information from the interviewee and then confirm this in-depth by using closed questions to ensure the data being collected is on track. The open, axial and reflective coding method was used to analyse the data. Open coding is the first coding method used in analysing the in-depth interview data. Open coding helps to make sense of the process and identify the root of the issue. The interviews were evenly split between married and single women. Some of the issues for married women in the open coding stage were things such as; * Age – feeling too old * Body image – being embarrassed by their body * Housework – having to cook and cleaning the house. * Kids – transporting and caring for children * Work – working long hours and irregular hours * No motivation – finding it hard to feel motivated to exercise * No friends to exercise with – not having a partner or group to exercise with * Poor knowledge of physical activities – not knowing the best methods to participate in physical activity * Low energy levels – feeling exhausted * No time – having no spare time to partake in regular physical recreation Some of the issues for single women were; * No time. * Lack of funds – not having the money to be able to pay for and travel to physical activities of their interest * No friends to exercise with – not having a partner or group to exercise with * Low energy levels – feeling exhausted * Poor location of facilities – not having the transport options available to get to recreation facilities * Poor knowledge of physical activities – not knowing the best methods to participate in physical activity * Other social activities – wanting to spend time socialising with friends going to the movies or eating together. For the axial coding stage the data was analysed to find a more whole view of the issues for non-participation of married and single women. Axial coding minimalises the number of statements made by the interviewees and identifies the more common themes. Common themes for married women in the axial coding stage were; * Family and housework * No energy and poor body image * No motivation due to lack of friends to exercise with and poor knowledge * No time due to work Common themes for single women in the axial coding stage were; * Money * No time due to work and study commitments * No motivation due to lack of friends to exercise with and poor knowledge * Relaxation and socialising. At this stage of the coding process some common themes are visible for both married and single women. The majority of married and single women stated that time commitments was a major issues for not exercising. The reasons for the lack of time may vary from the married to the single women. This takes us into the third stage of the coding process, reflective coding. Reflective coding aims to seek any inter-relationship that may exist in the major themes. (Kwek 2011) This stage of the coding process paints an overall picture of the data collected and the major themes. The main themes in this research for married women are; * Lack of time * Family commitment * Lack of motivation Due to family and work commitments married women in this study seem to have insufficient time to participate in physical activity. The main themes in this research for single women are; * Lack of time * Lack of motivation * Lack of funds Like married women most single women in this study believe they do not have enough time to regularly partake in physical activity. A lack of motivation is also a common theme amongst married and single women. Single women in this interview process also claim that a lack of sufficient funding to engage in physical recreation is a big factor in their non-participation. Part 3) Discussion of Findings It is important to note that all the interviewees are non-participant in physical exercise. The reason for this study is to find out why these ladies are not exercising on a regular basis. The main issue that this qualitative research has found is time. Examination of the respondents both the married and single felt that lack of time is the main reason for the not to doing physical activity on a regular basis. There are some similar themes for both married and single women in relation to time constraints. One reason for lack of time that is evident in both groups is work or study commitments. For example, one respondent (Worker) noted that â€Å"I work five days a week and I have three children to look after so there isn’t usually much time left over for myself†. One single woman stated that â€Å"If I had more time I would be much more likely to do something active† (Kylie) It is clear here that both married and single women if they had more time would be more inclined to participate in physical activity. Another common reason for non-participation is lack of motivation. The majority of married and single women in this study feel no motivation to exercise. One similar reason for married and single women to hove low motivation is the lack of company to perform the physical activity with. Jane a married woman claims that she would be â€Å"more inclined to go if someone came with me, it would keep me motivated† Kylie a single woman also states that she would be â€Å"more inclined to do something like that if I had someone to go with†. Sheree feels the same, â€Å"I feel if I work less hours I would feel less exhausted and therefore more motivated to exercise† Working less and having a friend or friends to exercise with are big factors in motivating both married and single women to engage in physical activity on a regular basis. Married women in this study believe that their family commitments are a large contributing factor for them not to participate in physical activity. Most married women in this research both worked and had children. With work and family comes a very busy life in which women are finding it hard to find time to exercise. â€Å"When I had my first child my priorities changed from looking after myself to looking after my family† This from Shazza who now is more interested in looking after the needs of her family than looking after her own health and quality of life. Married women with kids have a hard time to allocate any time to exercise because family is a full time job. What little time they do get they often would rather spend it with their husbands or just relaxing in general â€Å"my weekends are made up of transporting my kids to sport, spending time with my husband and doing work around the house†. (Shazza) Single women in this qualitative study are shown to have issues with money in relation to the funding of physical activities. It is hard to find an activity that is fun and motivating without having to pay something. Even walking will cost a participant in the form of correct shoes. A Large portion of the single women that were interviewed for this study claim that they do not have enough money or cannot justify spending a large amount of money on physical activity. â€Å"Joining a gym is so expensive these days and sometime I can’t justify paying that much†. (Kylie) It is easy to understand that Kat who is aged only eighteen has not enough money to invest in her physical recreation. Eighteen is such a young age where a girl is trying to find her feel and begin a independent life away from school and possible family. Although some of the time constraint and motivational reasons for non-participation are similar between married and single women it is also apparent that other issues such as family and funding can be found for both married and single women but generally in the bulk of cases family was an issue for married woman and funding was an issue for single woman. It is important to understand that the major issues discussed can be related and compound one another. Part 4) Conclusion In summary the research suggests that the major reasons for single and married women involved in this study are time and motivation. The vast majority of all the women interviewed found that motivation and time constraints were the biggest issues stopping them from being involved in physical activity on a regular basis. A number of respondents specifically noted that if they had more spare time they would in fact be involved in exercise of some description. Another stand out problem for married women was family commitments. Looking after a family took up a lot of the interviewees time and drained them of motivation linking the issues together. It is similar for the single women that also had lack of financing as a stumbling block to physical activity. Not having enough money deprives the respondent of motivation to regularly exercise. Although the major issues are very similar for both married and single women it is the finer details that make them different. For more women to begin and continue to partake in regular physical activity there needs to be some change in society. This research shows that women need more time and motivation for this to become a reality. One way to gain more time for future women would be to reduce the hours of a normal working week. Another would be to introduce some government funded recreational activities targeting women in their communities. It is important that more research is done in this field to further understand these major issues and work towards an increase in exercise from all women. Part 5) Reference List Erickson, J. & Gillespie, C. (2000) Reasons women discontinued participation in an exercise and wellness program. The physical educator, 57 (1), 2-7. Retrieved from Google Scholar Kwek, A. (2011). 1002HSL Week 4 Lecture: Qualitative research methods. Retrieved from Griffith University, Department of Tourism, Leisure, Hotel & Sport Management, Learning@Griffith Website. Nomaguchi, K. & Bianchi, S. (2004) Exercise time: Gender differences in the effects of marriage, parenthood, and employment. Journal of marriage and family, 66, 413-430. Retrieved from ABI/Inform Global. Verhoef, M. , Love, E. & Rose, S. (2003) Women’s social rules and their exercise participation. Women & Health, 19 (4), 15-29. Retrieved from ABI/Inform Global.