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Design a CSTR to provide pretreatment for an industrial wastewater that flows at a rate of 1,000 fpm with a phenol concentration of 200 mg/L. Phenol undergoes a first-order decay reaction in the CSTR with a rate constant, k=0.50 hr^(-1). The current industrial pretreatment permit limitation for phenol is 20 mg/L. The permit limitation may be changed, either higher or lower, in the future. 1. Determine the required CSTR volume, V (in gallons), and hydraulic residence time, in V/Q (hours), to comply with the current industrial pretreatment permit limitation for phenol. 2. Plot a graph with CSTR effluent phenol concentration in mg/L along the vertical axis as a function of CSTR hydraulic residence time in hours, on the horizontal axis for assessing the impact of changes in the permit limitation. Use a spreadsheet to perform the repetitive calculations and then use the spreadsheet's graphing tools to plot the graph. Comment on a type of "Law of Diminishing Returns" on effluent phenol concentration versus the V/Q that applies to CSTR design for first-order decay reactions.
A stock solution is prepared by adding 22 mL of 1 M Na3PO4 to enough water to make 73 mL. What is the PO43- concentration of 30 mL of the stock solution?
Develop a hypothesis relating to the amount of dissolved oxygen measured in the water sample and the number of fish observed in the body of water.
Calculate the approximate SO 2 mass emission in lb/day.
The molecular weight of the protein is 3.4e4 grams per mole. What is the molar concentration of the protein?
Which one of the following reactions occurring at 25 ?°C is the formation reaction of H2SO4(l) a. H2(g) + S(s) + 2O2(g) => H2SO4(l) b. H2SO4(l) => H2(g) + S(s) + 2O2(g) c. H2(g) + S(g) + 2O2(g) => H2SO4(l) d. H2SO4(l) => 2H(g) + S(s) + 4O(g) e. 2H..
How do you find the ratio of the cis and trans isomers from the H NMR spectrum?
what are some difference or similarity in the type of inhibition caused by heat, acid or base and heavy metal ions on enzyme activity.
A rectangular block has dimensions 2.9 cm 4.0 cm 10.0 cm. The mass of the block is 625.0 g. What is the volume of the block?
A volume of 25.0 mL of .100 M HCl is titrated against a .100 M NH3 solution added to it from a buret. Calculate the pH value of solution (a) after 10.0 mL of NH3 solution have been added and
Calculate the standard cell potential for each of the following cells then write the overall reaction. (These rxns are given in reduction order for each half-cell.)
A saturated solution of nickel(II) sulfide contains approximately 3.6 multiplied by 10-4 g of dissolved NiS per liter at 20°C. Calculate the solubility product Ksp for NiS at 20°C.
2NOCl(g) → 2NO(g) + Cl2(g) ,At 450 K the rate constant is 15.4 atm-1s-1. How much time (in s) is needed for NOCl originally at a partial pressure of 46 torr to decay to 25.8 torr.
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