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Determine the number of sand filters needed to treat a total flowrate of 100,000 m3/day if...
2. A sanitation district is to install rapid sand filters downstream of the clarifiers. The design-...
2. A sanitation district is to install rapid sand filters downstream of the clarifiers. The design- loading rate is selected at 190 m/m per day. The design capacity of the waterworks is 0.30 m/sec. The maximum surface per filter is limited to 50 m² • a.) Design the number and size of filters (Assume the cross section of filters is square, determine the length of side); calculate the normal filtration rate base on your design. b.) A sieve analysis curve...
QUESTION 6 [14 MARKS] A slow sand filter treats 4 MI/day at a rate of 0.1 m/hour. a. Determine the area and number o...
QUESTION 6 [14 MARKS] A slow sand filter treats 4 MI/day at a rate of 0.1 m/hour. a. Determine the area and number of units required if the rate of must not exceed 0.18 m/hour when one filter is backwashed, and 0.25 m/hour when one filter is out of service and another is being backwashed. (10) b. Explain what would happen if the maximum rate of treatment is exceeded. (4)
QUESTION 6 [14 MARKS] A slow sand filter treats 4...
Daily samples of 150 sand filters are removed from Pentair Corporation's assembly line and inspected for...
Daily samples of 150 sand filters are removed from Pentair Corporation's assembly line and inspected for defects. Over the past 22 days, the following information has been gathered. Develop a (95.45% confidence level) p-chart. Day Number of Defective Filters Day Number of Defective Filters 1 7 12 9 2 15 13 11 3 11 14 20 4 17 15 21 5 12 16 12 6 4 17 6 7 5 18 13 8 10 19 4 9 6 20 6...
A city in the eastern part of US utilizes conventional water treatment process to treat 30...
A city in the eastern part of US utilizes conventional water treatment process to treat 30 million gallons of water per day. Following the flash mix, coagulation/flocculation and sedimentation processes, nine (9) dual sand media filters, each with a surface area of 20’ by 40’, are utilized. One filter, at a time, is taken out of service for backwash. It is estimated that each filter is backwashed once in every 24-hour period, for 10 minutes, at a backwash rate of...
10-2 (15 pts) Determine the land area and water depth needed for a free water surface...
10-2 (15 pts) Determine the land area and water depth needed for a free water surface and a subsurface flow wetland to treat 200 m3/day of 200 mg/L BOD. FWS SSF Criteria Detention Time (days) Loading Rate (kg ha-1d-1) Depth (m) 110 0.1 -0.5 110 0.3-0.6
Primary clarifier is to be designed for a municipal wastewater treatment plant with a flow of 416...
primary clarifier is to be designed for a municipal wastewater treatment plant with a flow of 4160 m/d and peak flow during the day of 3.10 times the average hourly flow. Pertinent data are: peak overflow rate 73.3 m/d.-m2, maximum peak weir loading 373 m3/d-m, and minimum tank depth 2.13 m. Determine: A. The clarifier diameter B. The side water deptlh C. The peak weir loading. Is it acceptable? D. The percent suspended solids removal on the basis of the...
\The flow rate to treat is 5.6 MGD and the BOD concentration is 150 mg/L. The...
\The flow rate to treat is 5.6 MGD and the BOD concentration is 150 mg/L. The design solids concentration (X) at steady-state is 2,000 mg/L. The design MCRT is 7 days. The kinetic coefficients are as follows: k = 2 g BOD/g cells*day; Ks = 25 mg BOD/L; kd = 0.06 1/day; Y = 0.5 g cells/g BOD. The influent ammonia concentration is 40 mg/L and nitrification is needed. It takes 1400 ft3 of air per pound of BOD. Use...
early start early finish Timo - - - ---- A 20 late finish Number of workers...
early start early finish Timo - - - ---- A 20 late finish Number of workers C 20 required daily for D 5 each activity E 10 F 10 G 15 E ---- FE G ------- - DH Activities GA 1 2 3 4 5 6 7 8 (a) On this diagram, show the total daily workers required (loading) assuming early start times for all activities. Show what portion of the total labor loading each day comes from each activity....
4. Determine the number of filter bags required for an 8-compartment baghouse that uses pulse-jetting as...
4. Determine the number of filter bags required for an 8-compartment baghouse that uses pulse-jetting as the method to remove particulate matter from the bags. The process gas exhaust rate is 100,000 ft/min and the recommended air-to-cloth ratio is 4 ft/min. The bags specified by the manufacturer have a diameter of 6 inches and height of 10 ft. (a) what is the total required fabric area? (ft)? (b) What number of bags is required? (c) How many bags are in...
2. A sanitation district is to install rapid sand filters downstream of the clarifiers. The design- loading rate is selected at 190 m/m per day. The design capacity of the waterworks is 0.30 m/sec. The maximum surface per filter is limited to 50 m² • a.) Design the number and size of filters (Assume the cross section of filters is square, determine the length of side); calculate the normal filtration rate base on your design. b.) A sieve analysis curve...
QUESTION 6 [14 MARKS] A slow sand filter treats 4 MI/day at a rate of 0.1 m/hour. a. Determine the area and number of units required if the rate of must not exceed 0.18 m/hour when one filter is backwashed, and 0.25 m/hour when one filter is out of service and another is being backwashed. (10) b. Explain what would happen if the maximum rate of treatment is exceeded. (4)
QUESTION 6 [14 MARKS] A slow sand filter treats 4...
10-2 (15 pts) Determine the land area and water depth needed for a free water surface and a subsurface flow wetland to treat 200 m3/day of 200 mg/L BOD. FWS SSF Criteria Detention Time (days) Loading Rate (kg ha-1d-1) Depth (m) 110 0.1 -0.5 110 0.3-0.6
primary clarifier is to be designed for a municipal wastewater treatment plant with a flow of 4160 m/d and peak flow during the day of 3.10 times the average hourly flow. Pertinent data are: peak overflow rate 73.3 m/d.-m2, maximum peak weir loading 373 m3/d-m, and minimum tank depth 2.13 m. Determine: A. The clarifier diameter B. The side water deptlh C. The peak weir loading. Is it acceptable? D. The percent suspended solids removal on the basis of the...
early start early finish Timo - - - ---- A 20 late finish Number of workers C 20 required daily for D 5 each activity E 10 F 10 G 15 E ---- FE G ------- - DH Activities GA 1 2 3 4 5 6 7 8 (a) On this diagram, show the total daily workers required (loading) assuming early start times for all activities. Show what portion of the total labor loading each day comes from each activity....
4. Determine the number of filter bags required for an 8-compartment baghouse that uses pulse-jetting as the method to remove particulate matter from the bags. The process gas exhaust rate is 100,000 ft/min and the recommended air-to-cloth ratio is 4 ft/min. The bags specified by the manufacturer have a diameter of 6 inches and height of 10 ft. (a) what is the total required fabric area? (ft)? (b) What number of bags is required? (c) How many bags are in...
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