As an operator of a wastewater treatment facility, you have learned that your plant runs well at an SRT (based on MLVSS (X) in the aeration basin) of 12 days. If today’s MLVSS (X) concentration is 2,700 mg/L and the RAS (Xr) concentration is 5,500 mg/L, how many L of sludge should you waste from the secondary clarifier today? Other design conditions: Average influent flow = 12,000 m3/d Influent soluble BOD = 150 mg/L Required effluent TSS = 30 mg/L Aeration tank Volume = 1,000 m3

Q: An activated sludge treatment system to treat a wastewater flow rate of 0.3 m/s of primary effluent.…

A:

Q: oluble BOD5 = 80 mg/L Assume that the BOD5 of the suspended solids may be estimated as equal to 50%…

A: According to given data  A small town has been directed to upgrade its primary wastewater treatment…

Q: Calculate theoretical oxygen requirement (kg/day) of a complete - mix activated sludge process…

A: To calculate the theoretical oxygen requirement, we need to consider the oxygen demand for carbon…

Q: Design three solids handling unit processes: (a) an anaerobic digester to treat a plant's primary…

A: a) To calculate the mass of sludge wasted that each digester will have to stabilize, we need to…

Q: After primary treatment, a municipal wastewater contains 150 mg/L BOD5. The wastewater flow of 0.44…

A: Given: Influent BOD, S0=150mg/L Discharge through the aeration tank=0.44cumec HRT=6hr…

Q: In activated sludge system, SRT is governed by

A: Activated sludge system:

Q: A complete mix activated sludge secondary treatment plant is wasting from the return sludge line.…

A: Solution: Given Data: Mean cell solids residence time Qc=5 daysV=1000 L=1 m3MLVSS Xt=2000 mg/LWaste…

Q: what aerobic reactor volume and operating SRT are required to treat a 20 MGD domestic wastewater…

A: Activated sludge process Assumptions All the reaction occurred in the aeration tank only The…

Q: b. Find the DO at 12 10. A water treatment plant treats the water at the rate of 33 MGD. Average…

A:

Q: (a) (b) Sludge thickening can be implemented using several methods. Describe TWO (2) differences…

A: Sludge can be defined as the residue that is left after the treatment of sewage. Sludge can be…

Q: How to determine the needed surface area of the secondary clarifier tank given that the flow is…

A: Given, Flow rate, Q = 40,000 m3 /day Recycling ratio = 0.5 Solid concentration = 13,000 mg/L MLSS =…

Q: 5) The town of Camp Verde has been directed to upgrade its primary Wastewater Treatment Plant (WWTP)…

A: Aeration Tank: The aeration tank is the tank in which wastewater is mixed with the sludge and it is…

Q: The City of Marietta has been directed by the City Board to upgrade its primary Wastewater Treatment…

A: Given   Y = 0.5 mg VSS/mg BOD removed  Kd = 0.05 d-1 (Theta)c =SRT= 14.5 days  Effluent BOD, S = 75…

Q: After primary treatment, a municipal wastewater contains 150 mg/L BOD5. The wastewater flow of 0.44…

A: To determine- Aeration volume (m3)

Q: A CMAS treatment system must be designed for a municipal wastewater and the following operating…

A: The given data is: BOD5=0.39m3/s VSS in the aeration tank=4300 mg/L 55 g VSS=100 gm soluble BODs…

Q: After primary treatment, a municipal wastewater contains 150 mg/L BOD5. The wastewater flow of 0.44…

A: To determine- Aeration volume (m3)

Q: An activated sludge tank is 30 m long and 10 m wide and has an SWD of 4 m. The wastewater flow is…

A:

Integrated Solid Waste Management

Integrated Solid Waste Management (ISWM) is a thorough waste suppression, compost, removal and recycling Program. An effective ISWM system considers how to suppress, manage and recycle solid waste in a manner that is most efficiently to protect human health and the surrounding. ISWM system requires evaluation of public wants and demands and then selecting and merging the most effective waste management activities for the proposed demands. The main ISWM activities for solid waste management are Waste prevention, Recycling and Composting, and Combustion and Removal and waste collection in a properly planned, constructed, managed and mitigated landfill areas. Each of these requires careful designing, financing, accumulation, and delivery of activities.