For each of the following constituents that might be found in water or wastewater, provide two examples of a unit operation that would be useful in removing that consitutent. a. Giardia lamblia (protozoan) b. Arsenic c. Bentonite (clay)
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- Describe the lime soda process for removing the hardness of water. Calculate the amountof lime and soda required for treatment of 10,000 liters of water containing the followingsalts in ppm.Al2(SO4)3 = 34.2 HCl = 7.3MgCl2= 19.0 NaCl= 58.5A water with low alkalinity of 15 mg/L as CaCO3 will be treated with the ferrous sulphate-lime coagulation. FeSO4 dosage is 18 mg/L. (CaCO3 = 100 g/mol, Ca(HCO3)2 = 162 g/mol, Ca(OH)2 = 74 g/mol, FeSO4.7H₂O = 278 g/mol, Fe(OH)2 = 90 g/mol). a. Determine the lime dosage needed to react with the ferrous sulphate for sweep coagulation. b. If dissolved oxygen (DO) concentration is 5 mg/L before coagulation, what is concentration of DO after coagulation?“construction of gravity-driven oil and water emulsion separator system in sinks using zeolite” Answer both • Significance of the research in local setting • edge of the product from other product
- A cement factory in Teluk Sepanggar, Kota Kinabalu Sabah has produced a particular brand of Portland cement using limestone, kaolinite and sand. The three raw materials are pre-calcined at 950°C, which drives off any carbon dioxide and water chemically with the minerals. The bulk oxide composition of the calcined materials is as follows: Limestone Kaolinite Sand Сао 100% SIO2 45%; SiO2 80%; Al203 : 55% Fe,03 : 20% The bulk oxide composition of the resulting clinker is: Oxide Сао Table 1.0 Bulk oxide composition % mass 66.4 Molecular weight 56 SiO2 Al2O3 Fe2O3 23.1 60 5.3 4.0 102 160 The free lime content of the clinker is 1.2% (molecular weight = 80), and if gypsum has not yet been added, what proportions of the four main cement compounds are potentially present? Your answer should be given to one decimal place. а. b. How much sand is used as a percentage of the total mass calcined raw materials?True or False: As the cations are removed from the soil colloids, they are replaced with acid-forming hydrogen and aluminum. Select one: O True O Falsed) Calculate total hardness in ppm of a solution of both 55 mg/L Al2(SO4)3 and 45 mg/L Mg(NO3)2.
- Problems arise if the contaminant concen- tration in the influent to the manufacturing step rises above a critical acceptable level (ca). Again, assuming that the contaminant con- centration in the municipal water is zero and that the UPW system does not remove any of this contaminant, solve for the recycle ra- tio (RR = R/Q) as a function of the other known quantities, Q, ca, and W. NOTE: for the purpose of answering this question, use "ca" to denote Ca.A cement factory In Teluk Sepanggar, Kota Kinabalu Sabah has produced a particular brand of Portland cement using limestone, kaolinite and sand. The three raw materials are pre-caldned at 950°C, which drives off any carbon diaxkde and water chemically with the minerals, The bulk oxide composition of the caldned materials is as follows: Limestone CaO 100% Kaolinite Sand 45%; Al:O1 SiOz :55% SIO2 80%; FezO3 20% The bulk oxide composition of the resulting dinker is: Table 1.0 Bulk oxide composition 第 mass Oxide Molecular weight CaO 66.4 56 23.1 60 Al,0, Fe,0, 102 160 5.3 4.0 CS Scanned with CamScannerCa+2 = 36.8mg/L Mg+2 = 2.9mg/L HCO3 = 98mg/L pH = 7.53 Temp = 9C Calculate the following: a. Hardness in units of mg/L as CaCO3 b. Ionic strength (be sure to include H++ and OH--) c. PCO2 in equilibrium with the sample d. Saturation index with respect to calcite (SIC) e. Saturation index with respect to dolomite (SID)
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