good filtration system is important for removal of pathogens using chlorine.
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- 6. Backwashing is used in A. Filtration processes B. Ion-exchange processes C. Membrane processes D. All of the above(c) Distinguish between UV and chlorine disinfection method for water treatment and then choose the best to be in terms of pH dependence and safety.Q-ASP is used to treat a waste water flow of 2MLD having BOD5 of 250 mg/lit. The biomass concentration in the aeration tank is 2500 mg/lit and the concentration of biomass leaving the system is 80 mg/lit, the aeration tank has a volume of 200m³. Find the sludge age.
- A 1,200 gpm WTP is being designed for treating iron and manganese. The influent manganese concentration is 80 mg/L and the iron concentration is 90 mg/L. How much oxygen (mg/L DO) from aeration is needed for design? Assuming that aeration only removes 85% of Fe and Mn, how much potassium permanganate is needed (mg/L)? Design standards require 30 days of chemicals onsite. Assuming that the chemicals onside are dry, how many lbs of potassium permanganate are required? If the treatment plant is to operate two filter cells at a time, what is the required SA of each cell, assuming SOR of 2.5 gpm/sqft?Exercise Module 8a (to be submitted into the droppbox Module 8a before Sunday Feb. 20): Describe why parameters such as pH, conductivity, sodium, chlorides, fluorides, sulfates, hardness, silica need to be controlled to prevent corrosion or scale build up in water containers/lines.It is also known as the vadose zone. Select the correct response: O Aeration zone O Capillary Fringe Soil water zone Saturated zone
- Prepare a step-by-step calculation procedure for design of a fabric filtration system.4. Problem 5-16 (modified), Davis and Cornwell, Introduction to Environmental Engineering, 5th Ed.: Determine the concentration (mol/L) of hydroxide that must be added to an aqueous solution to produce a concentration of 0.50 mg/L copper if the starting concentration is 3.5 mg/L copper. The solubility product for copper hydroxide (Cu(OH)2) is 2.2 x 10-20 mol/L. What is the resulting solution pH?Design a trickling filter system for BOD removal without the nitrification requirement, to treat municipal wastewater with an average flow of 200 m3/d (Qin) and influent BOD of 200 mg/L and Ammonium (NH4-N) of 42 mg/L. Make appropriate assumptions and use the design indicators for plastic media filters as given below. What are the possible effects of the peak flow of 1.5 times occurring once in a month? Volumetric loading rate (Bv)= 0.5 kgBOD/m3.d Volumetric loading rate for NH4-N (Bv, NH4-N)= 0.2 kgNH4-N/m3.d Hydraulic loading rate (qh= Q/AR)= 1.2 m/h Recirculation ratio (Qr/Qin) = 0.5
- The purpose of heat treatmentConsider that water aeration does not result in calcium carbonate precipitation, which of the compounds listed would not be removed by aeration: hydrogen sulfide, carbon dioxide, odorous and volatile bacterial metabolites, alkalinity and iron?Q3) There are suspended solids in produced fluids such as scale deposits, corrosion products, sand and fines. There are several types of processes that have been developed for solids removal. Describe each of the following processes each in a separate paragraph: Diatomaceous Earth (DE) Filters. Cartridge Filters.