treatment of seafood processing wastewater

... values of Vietnamese Standards (Department of Natural resources and environment of Hochiminh City) Therefore, with given reasons, using constructed wetlands for treatment of wastewater in seafood processing ... Review of the literature The most common treatment process consists of chemical physical treatment step, and biological treatment step depending on the composition of the wastewater Biological wastewater ... optimization of the pretreatment system The pre -treatment system had the volume of 250L, and operated continuously, it needed a large volume of wastewater Thus, artificial wastewater was made of squid...

Ngày tải lên: 09/01/2015, 08:53

... Society of Civil Engineers, a member of the American Institute of Chemical Engineers, a member of the Water Environment Federation, a member of the American Association of University Professors, ... This book is titled Physical–Chemical Treatment of Water and Wastewater This chapter begins by defining wastewater and physical–chemical treatment of water and wastewater and treats briefly the coverage ... mandates construction of wastewater treatment facilities that, at least, must produce the secondary level of treatment The Safe Water Drinking Water Act also requires performance of treatment plants...

Ngày tải lên: 11/08/2014, 10:22

... concentrations of 250 mg/L are objectionable, however, would depend upon the degree of acclimation of the user to the water In Antipolo, a barrio of Cebu in the Philippines, the normal source of water of ... Constituents of Water and Wastewater 131 freedom from toxic materials, favorable pH and osmotic pressure conditions, optimal amount of nutrients, and the presence of significant amount of population of ... Physical–Chemical Treatment of Water and Wastewater 2.1.26 PRIORITY POLLUTANTS Before the 1970s, control of discharges to receiving bodies of water were not very strict During those times, discharge of partially...

Ngày tải lên: 11/08/2014, 10:22

... Projected area of paddle blade Sum of projected areas of paddle blades Length of paddle blade Coefficient of drag Width of paddle blade The diameter of the impeller Diameter of vessel Distance of impeller ... length of the paddle blades of the longest compartment to that of the length of the paddle blades of the middle compartment is 2.6:2, and the ratio of the length of the paddle blades of the middle ... velocity of bubbles Average rise velocity of water Tangential velocity of paddle Paddle tip velocity Volume of tank Volume of bubble Average volume of bubbles in tank Average volume of bubble...

Ngày tải lên: 11/08/2014, 10:22

... of the cylindrical element of fluid; Fg is the weight of the fluid in the element; Fsh is the shear force acting on the fluid along the surface areas of the grains; dV is the volume of element of ... the temperature of filtration The value of c may be determined by performing an experiment of the particular type of sludge To determine α o , take the logarithms of both sides of Equation (7.67), ... filter sand of sieve analysis of Problem 7.10 is used to construct (a) a slow-sand filter of average porosity of 0.39 operated at 9.33 m /m ⋅ d and (b) a rapid-sand filter of average porosity of 0.42...

Ngày tải lên: 11/08/2014, 10:22

... function of the size of the solute molecule • Percentage removal increases as the percent dissociation of the solute molecule increases The degree of dissociation of a molecule is a function of pH, ... exhaustion The total volume of wastewater treated at exhaustion is designated by Vx Determination of the length of the active zone The length of the active zone represents a portion of bed that is no ... rate of application of the influent be recorded, as the length of δ is dependent upon this flow rate The faster the rate of application, the longer the length of δ, and the slower the rate of application,...

Ngày tải lên: 11/08/2014, 10:22

... amount of calcium carbonate that precipitates is simply the equivalent of the calcium ion that precipitates, Cappt Because the number of moles of Cappt is equal to the number of moles of the ... 2:27 PM 534 Physical–Chemical Treatment of Water and Wastewater a distribution main at a rate of 0.22 m /s Determine the length of time it takes to clog a section of the distribution main km in ... complex of calcium ion [∆carb] Moles of carbon dioxide per unit volume of flow required to bring the pH of water to the saturation pH o CaSO Sulfate complex of calcium ion [∆Decarb] Moles of base...

Ngày tải lên: 11/08/2014, 10:22

... concentrations of each of these complex ions are determined by the pH of the solution In the application of the above equations in an actual coagulation treatment of water as in all applications of coagulants, ... that the concentrations of each of these complex ions are determined by the pH of the solution In the application of the above equations in an actual coagulation treatment of water, conditions must ... means that the concentrations of each of these complex ions are determined by the pH of the solution In the application of the previous equations in coagulation treatment of water, conditions must...

Ngày tải lên: 11/08/2014, 10:22

... means that the concentrations of each of these complex ions are determined by the pH of the solution In the application of the previous equations in an actual treatment of water, conditions must ... in terms of equivalents of the bicarbonate ion, or in terms of the equivalents of the hydroxide ion The number of equivalents of the hydroxide ion is equal to its number of moles, so it is convenient ... Reduction—The addition of electrons to the valence shell of an atom Reference species—The number of moles of electrons involved or the number of positive (or negative) moles of charges or oxidation...

Ngày tải lên: 11/08/2014, 10:22

... liter of suspended solids in raw water Cubic meters of water treated Water of hydration of alum Activity coefficient of the calcium ion Activity coefficient of the hydrogen ion Activity coefficient of ... phosphate phosphorus of the raw water The p orbital of the valence shell Fractional purity of alum Fractional purity of lime Fractional purity of ferric chloride Fractional purity of ferric sulfate ... removal of original suspended of raw water K HPO Equilibrium constant of the hydrogen phosphate ion K H2 PO4 Equilibrium constant of the dihydrogen phosphate ion K H3 PO4 Equilibrium constant of phosphoric...

Ngày tải lên: 11/08/2014, 10:22

... Yc, Ydn, and Ydc The units of Yc and Ydc are in terms of moles of organisms per unit mole of sewage The units of Ydn are in terms of moles of organism per unit mole of nitrate nitrogen The units ... rate of increase of the concentration of the organisms The first term on the right-hand side of Equation (15.71) is the rate of increase of microorganism that corresponds to the rate of decrease of ... mg/L of TKN, 25 mg/L of ammonia nitrogen, and 200 mg/L of BOD5 The effluent from the tank contains 2.0 mg/L of dissolved oxygen, 0.5 mg/L of NO2−N, 2.0 mg/L of ammonia nitrogen, and 10 mg/L of BOD5...

Ngày tải lên: 11/08/2014, 10:22

... 16.1 Unit operations of ion exchange of ions takes place This exchange of ions is the chemical reaction of the unit process of ion exchange; the mere physical passing through of the water with the ... DESIGN OF ION EXCHANGERS Generally, designs of ion exchangers should include the following: quantity of exchange materials and regenerants; dimension of the bed (volume of bed); interval of bed ... 0.0035 m For an interval of regeneration of h and assuming a rate of flow for the water treated of 75 m /d, the volume of water treated is 75/24(8) = 25 m Thus, the wastewater produced is 0.0035/25...

Ngày tải lên: 11/08/2014, 10:22

... the unit of disinfecting power of NaOCl is NaOCl/2 = 37.24 Therefore, the available chlorine of NaOCl is the ratio of the mass of chlorine to the mass of NaOCl that has the same unit of oxidizing ... system to be used for a wastewater treatment plant processing an average of 25,000 m /d of wastewater The peaking factor is 3.0 and the regulatory agency requires a dosage of 20.0 mg/L Solution: ... system to be used for a wastewater treatment plant processing an average of 800 m /d of wastewater The peaking factor is 3.0 and the regulatory agency requires a dosage of 20.0 mg/L 17.30 The...

Ngày tải lên: 11/08/2014, 10:22

... minutes Fig Effect of backflush pressure on the flux, MLSS of 8700 mg/l, TMP of 0.4 bar, CFV of 0.88 m/s, backflushing pressure of 1.5 bar and backflushing interval of s Fig Effect of backflush interval ... amount of nitrogen and phosphorous were added to the wastewater to achieve COD : N : P ratio of 100 : : The pH of wastewater was also neutralized Experimental Setup A schematic diagram of the ... MINUTES Fig Effect of TMP on the membrane flux, MLSS of 9300 mg/L, CVF (v) of 0.79 m/s, without backflush Fig Effect of CFV (v) on the membrane flux, MLSS of 9300 mg/L, TMP of 0.4 bar, without...

Ngày tải lên: 05/09/2013, 09:08

... activities of nitrite oxidizing bacteria - 31 - Journal of Water and Environment Technology, Vol.5, No.1, 2007 Figure Behavior of nitrate and nitrite at the end of the aerobic tank Behavior of Nitrobacter ... with ethanol at a final concentration of 10%, then transported to the laboratory of UT at 4oCstored Then, each of the samples were divided into two One of them was for DNA extraction and was ... implementation of QP-PCR was applied, and the condition was optimized In general, the higher concentration of primers can lead to the formation of primer dimers Also, the cost of the chemicals...

Ngày tải lên: 05/09/2013, 09:38

... concentration of 6.0 g/L and a sludge volume index (SVI) of 90.5 mL/g - 84 - Journal of Water and Environment Technology, Vol 7, No 2, 2009 Table - Composition of the Municipal Wastewater Component ... (%) Effect of HRT of the regeneration tank Fig illustrates the effect of HRT of the regeneration tank on the CARS system performance The COD removal increased with an increase in HRT of the regeneration ... diagram of CARS system Seed sludge The reactors were inoculated with activated sludge taken from the Wangxiaoying Wastewater Treatment Plant, Hefei, China The seeding sludge had a sludge age of 15...

Ngày tải lên: 05/09/2013, 09:38

... from Ingestion of Water Sources of Contaminant in Drinking Water ~ Bromate as of as of 1101/02: D1/01/02: zero 0.010 as of as of as of Chloramines (as C1J as of Increased risk of Cancer Eyehose ... risk of cancer 01/01/02: 01/01/02: nla6 0.060 Trihalomethanes _ - central nervous as of as of none' 0.10 as of as of Liver, kidney or Byproduct of drinkin$ water disinfection Byproduct of ... with all of the subtleties of this piece of complex environmental legislation Tables through are derived from EPA Web site - www gov/safauter epa AN OVERVIEW OF WATER AND WASTEWATER TREATMENT...

Ngày tải lên: 16/03/2014, 18:11

... determination of the suitable content of polymer A101 with the circulation time, the speed of the stir to the effect of the treatment processing Propose the suitable factors for the treatment processing of ... impact of pH to the effect of the treatment processing 100,0 E ffect (% ) 95,0 90,0 85,0 80,0 pH Fig The impact of pH to the effect of the treatment processing 10 N.B Tien, T.V Quy / VNU Journal of ... the treatment processing The effect of the processing is about 97.3 – 98.9 % So we chose the pH value of for subsequent experiments Table The impact of PAC content to the effect of treatment processing...

Ngày tải lên: 28/03/2014, 15:20

... Detention Time in Minutes Wastewater Sources and Characteristics 18.5.1 Wastewater Sources 18.5.1.1 Generation of Wastewater 18.5.2 ClassiÞcation of Wastewater 18.5.3 Wastewater Characteristics ... purpose of wastewater treatment has been to protect the health and well being of our communities Water and wastewater treatment operations have accomplished this goal by (1) prevention of disease ... expanded the role of the federal government in water pollution control and significantly increased federal funding for construction of wastewater treatment plants Many of the wastewater treatment plants...

Ngày tải lên: 01/04/2014, 11:46