Help pls The following data were reported on the operation of primary settling tank andactivated sludge system of Wastewater Treatment Plant:(c)Primary Settling Tank:Influent186 mg/L275 mg/LRemoval Efficiency35%60%BODSuspended Solid (SS)Activated Sludge System:: 0.08 m³/s: 7.5 wide, 30m long, 4m deep(2 tanks are operated in series): 3,000 mg/L: 25 mg/L: 40 mg/LFlowAeration Tank DimensionMixed Liquor Suspended SolidEffluent BODSuspended SolidsDetermine:(i)Hydraulic Retention Time(ii)F/M ratio(iii)Suspended solids and BOD removal efficiencies(iv)Provide justification on the efficiency of the wastewater treatment plant basedon above results.Given:F QS,M VX

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The following data were reported on the operation of primary settling tank and activated sludge system of Wastewater Treatment Plant: (c) Primary Settling Tank: Influent 186 mg/L 275 mg/L Removal Efficiency 35% 60% BOD Suspended Solid (SS) Activated Sludge System: Flow :0.08 m'/s : 7.5 wide, 30m long, 4m deep (2 tanks are operated in series) : 3,000 mg/L : 25 mg/L : 40 mg/L Aeration Tank Dimension Mixed Liquor Suspended Solid Effluent BOD Suspended Solids Determine: (i) Hydraulic Retention Time (ii) F/M ratio (iii) Suspended solids and BOD removal efficiencies

The following data were reported on the operation of primary settling tank and activated sludge system of Wastewater Treatment Plant: (c) Primary Settling Tank: Influent 186 mg/L 275 mg/L Removal Efficiency 35% 60% BOD Suspended Solid (SS) Activated Sludge System: Flow :0.08 m'/s : 7.5 wide, 30m long, 4m deep (2 tanks are operated in series) : 3,000 mg/L : 25 mg/L : 40 mg/L Aeration Tank Dimension Mixed Liquor Suspended Solid Effluent BOD Suspended Solids Determine: (i) Hydraulic Retention Time (ii) F/M ratio (iii) Suspended solids and BOD removal efficiencies

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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The 750-bed Associated Center of Medical Excellence (ACME) Hospital has a small activated sludge plant to treat its wastewater. The average daily Medical Center discharge is 1,250 L per day per bed, and the average soluble BOD5 after primary settling is 450 mg/L. The aeration tank has effective liquid dimensions of 10.0 m wide by 25.0 m long by 3.5 m deep. The plant operating parameters are as follows: MLVSS = 2,750 mg/L MLSS = 1.25 (MLVSS) Settled sludge volume after 30 min = 250 mL/LDetermine the following: aeration period, F/M ratio, SVI, solids concentration in return sludge.
The 550-bed Atlanta Hospital has a small, activated sludge plant to treat wastewater from the hospital. The average daily hospital discharge is 1.50 m3 per day per bed, and the average soluble BOD5 after primary settling is 450 mg/L. The aeration tank effective liguid dimensions of 10 m x 10 m x 5 m. The plant operating parameters are as follows: MLVSS - 2,600 mg/L; MLSS - 1.20 (MLVSS); Settling sludge volume after 30 min. = 200 mL/L. The F/M ratio is nearly?
The 550-bed Atlanta Hospital has a small, activated sludge plant to treat wastewater from the hospital. The average daily hospital discharge is 1.50 m3 per day per bed, and the average soluble BOD5 after primary settling is 450 mg/L. The aeration tank effective liguid dimensions of 10 m x 10 m x 5 m. The plant operating parameters are as follows: MLVSS - 2,600 mg/L; MLSS - 1.20 (MLVSS); Settling sludge volume after 30 min. = 200 mL/L. The aeration time is nearly?
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An activated sludge plant with recycle is evaluating its secondary clarification system. Settling column tests are conducted and analyzed for settling velocities at different initial solids concentrations. The data are provided below. The plant flow rate is 10,000 m3/d, with a recirculation ratio of 0.5. The MLSS in the reactor is 4000 mg/L. The desired underflow concentration is 17,000 mg/L. Solids concentration mg/L Settling velocity m/h 1500 6.5 3000 5.1 4500 4 6000 2.95 7500 2 9000 1.4 12,000 0.5 15,000 0.27 17,000 0.2 a. Calculate the required surface area if one clarifier is used. b. Calculate underflow rate, underflow velocity, and overflow rate for single clarifier design. Clearly state your assumptions. c. Calculate the required surface area if two clarifiers are used
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