Flow rate:  1.5 m3/s Pollution: pesticide permethrin Lake size: 100m x100m x 2.5m Steady state concentration of permethrin leaving the lake is 1.4 ppm Average cross-sectional area of the river is 2.7 m2. Half-life of permethrin in this environment is 19 hrs. What is the concentration of permethrin entering the lake and what distance downstream of the outlet would the concentration be less than 1 ppm?

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A: The critical concentration according to Streeter-Phelps equation is given by:…

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Q: The facultative pond at USM's sewage treatment plant is designed with the following data; Aerial…

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Q: A creek is flowing at an average rate of 0.4 m^3/s. A corporation is importing 30% of the creek…

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Q: A stream containing no biochemical O2 demand (obviously a hypothetical situation) has a DO of 5.00…

A: Given  DO = 5.00mg/l Flow Rate =  8.7m3/s Temperature = 15oC Avg Velocity =  0.174 m/s Avg Depth =…

Q: ENVIRONMENTAL ENGINEERING (Practice Questions) a). State the Ultimate Carbonaceous Oxygen Demand…

A: ii)

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Q: anaerobic digester at 35°C

A: Given: Average flow rate of industrial wastewater = 1000 m3/day Total quantity of organic substance…

Q: Specific energy for this flow is...........

A:

Q: A wastewater treatment plant discharges an effluent containing 2 mg/L of dissolved oxygen to a river…

A:

Q: Fifty kilograms of toxic material is spilled uniformly across a canal. The canal is trapezoidal with…

A: Velocity, V = Q/A. V = 16/12.325 = 1.3 m/s  For after t= 2 hours of spill, t= 2*60*60 sec length of…

Q: (e) A large stream has a reoxygenation constant of 0.4 per day (on base 10). At a velocity of 0.85…

A:

Q: A stream has a cross-sectional area of ​​A= 85 m2, length L = 1000 m, velocity U=185 m/hour,…

A: Given area of the stream  A=85 m2 Area of the stream  A=85 m2and velocity of the stream U=185 m/hour…

Q: A 0.5 ppm concentration of copper sulfate is to be applied to a lake to control the growth of algae.…

A: The copper sulfate of both forms granulated and pulverized is used to control the algae. This…

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Q: a flow rate of 8.7 m3/s an ous mixing, estimate the c

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Q: A salt lake doesn't have an outflow since evaporation totally balances the intake flow.  This is…

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Q: A small industrial plant discharges wastewater into a stream. The plant discharge has a flow rate of…

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Q: river and the slaughterhouse wastewater is 28°C. Calculate the initial ultimate BOD after mixing.…

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Q: outfall diffuser that discharges treated wastewater into the Pacific ocean is 5,000 m from a public…

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Q: Fifteen kilograms of contaminant is spilled into a stream 5 m wide and 1 m deep. The flow in the…

A: Given, Width (b) = 5m  Depth (d) = 1 m Flow rate (Q) = 2 m3/s KL = 3 m2/s k = 50/day

Q: The herbicide atrazine is accidentally spilled into a river, resulting in 80 μg/L atrazine…

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Q: A municipal wastewater treatment plant processes an average flow of 5000 m³/d. A primary clarifier…

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Q: A waste water stream (flow = 2 m3/s), ultimate BOD = 90 mg/l is joining a small river (flow = 12…

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.