Any help or direction that can be given would be fantastic. Will upvote!!!

[answerhappygod]

Any help or direction that can be given would be fantastic. Will
upvote!!!

Any Help Or Direction That Can Be Given Would Be Fantastic Will Upvote 1 (129.47 KiB) Viewed 34 times

Design the following units for a design flow rate of 20 med. Assume the water temperature is 10°C in all your calculations. Clearly state the assumptions that you made and the source of assumptions once designing each unit. Present the layout of all the units in a flow chart and highlight the dimensions and retention times of each unit. State the quantity of chemicals required in a tabulated format. and pH 8. After filtration, the water is chlorinated in a complete-mixed storage tank and then pumped to the first customer in two miles of 24-inch diameter pipe. Assume free chlorine residual is disappeared with a first-order rate of 0.2 min-1 in the storage tank and pipe. Determine how many pounds of Nagct required to be added to the input of storage tank to maintain a 0.4 mg/1 residual chlorine concentration at the first customer. Assume the mean residence time for the storage tank is 150 min and t10 is 80 min. Determine the dimension of storage tank. Determine whether the required C-t value to inactivate Giardia lamblia, viruses and Cryptosporidium has been met. Required Design Units 1 • Rapid Mixing unit: Use typical design parameters (G and tt) to determine the volume (and dimensions) of fast mixing tank(s) and the power required for the mixer(s). Assume the mechanical mixer is 65% efficient in transferring power to the water. • Flocculation unit: Use typical design parameters (G and tt) to determine the volume (and dimensions) of flocculation tank(s) and the power required for the paddle flocculator motor(s), assuming it operates at 60% efficiency. Based on the calculated dimensions and the power, design appropriate paddle flocculator (including number of shafts, number of compartments, number of arms of each paddle, number of blades and their locations and size). Select a filtration rate (in a typical range of 2-10 gpm/ft2 to determine the required surface area (and dimensions) for square rapid sand filter(s) with a total depth of 1 m. If the initial head loss through the clean filter is limited to 1 m, design a dual-media consisting of a layer of uniform anthracite and a layer of uniform sand. • Coagulation Unit: . Assume from the jar test you found that the optimum dosage for alum as coagulant is 20 mg/l and the same dosage of lime required to keep the pH in the acceptable range. Calculate (a) How many pounds of alum are needed? (b) How many pounds of quicklime are required, assuming a purity of 60% Cao? (c) How many pounds of ALOH)3 sludge are produced? • Sedimentation unit: Use typical design parameters (overflow rate, depth, horizontal velocity, detention time, weir loading, etc.) to determine the volume (and dimensions) of rectangular clarifier(s), and the length of effluent weir(s) • Softening Unit: Assuming the following water quality parameters were analyzed in laboratory. Using excess- Time treatment the water is to be softened. Sketch a meg/l bar graph and list the hypothetical combinations of chemical compounds in the raw water. Calculate the quantity of softening chemicals required in pounds and the theoretical quantity of carbon dioxide needed to provide a finished water with 60% of the alkalinity converted to bicarbonate ion. Draw a bar a graph for the softened water after recarbonation and filtration. CO2 = 11 mg/l as CO2 Ca2+ = 40 mg/ Mg2+ = 27 mg/ Na+ = 9 mg/ HCO3- = 105 mg/ SO42- = 121 mg/ Cl- = 13 mg/ Disinfection Unit • Assume the effluent from the filtration unit has a turbidity less than 0.3 NTU