Consider a well-mixed aeration lagoon to remove BOD from a waste stream flowing at 5 MGD. The lagoon is 100-m long, 30-m wide and 3-m deep. Given the default microbial kinetic parameters (Ks = 60 mg BOD5/L, μm = 3 day-1 , kd = 0.06 day-1 ) calculate the concentration of BOD5 in the waste stream leaving the lagoon.

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Q: A municipality plans to treat 2.7 ML/d of a groundwater that contains 85 µg/L of…

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A: width of tank=2.1m=210cmdepth of tank=1.6m=160cmdiameter of particles = 120 μm = 0.12 mm = 0.012…

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A: Step 1: The approximate alkalinity of the water sample in mg/L as CaCO3 can be calculated from the…

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Q: A container of Atrazine (500 g) is dumped into a river 2.3 km upstream of a municipal water intake…

A: Given, M = 500 gm or 0.5 kg L = 2.3 km or 2300 m  A = 5.7 m2  Q = 8.25 m3/s D = 0.1 m2/s

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Q: 300 mL of wastewater was collected, aerated and seeded with bacteria. The dissolved oxygen content…

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Q: Domestic wastewater has a reaction rate coefficient of 0.3 1/d at 20° C.  The ultimate BOD of the…

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Q: Using Rihet equation, estimate aeration tank Volume (V) based on the following conditions:…

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A: A bio-tower composed of a modular plastic medium of 6 m is used as a secondary treatment component…

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Q: 9. Improperly stored industrial waste results in the discharge of chlorobenzene (C6H5CI) into…

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A: Step 1: Step 2: Step 3: Step 4:

Q: A municipality plans to treat 2.7 ML/d of a groundwater that contains 85 µg/L of…

A: Given, Q=2.7MLD D=3.66 m W=9000 kg γb=450 kg/m3 K=470(μg/g)(L/μg)1/n 1n=0.515 Influent…

Q: A bio-tower composed of a modular plastic medium of 6 m is used as secondary treatment component in…

A: A bio-tower composed of a modular plastic medium of 6 m is used as a secondary treatment component…

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Q: A complete-mixed activated sludge process is to be designed to treat 5.0 MGD of primary effluent…

A: Flow rate= 5 MGD  Primary effluent BOD5 = 180 mg/ L

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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.