A lagoon with a volume of 1200 m3 has been receiving a steady flow Q = 100 m3/day of a non-conservative pollutant with a reaction rate constant k1 = 0.2 day-1 for a long enough time to assume that steady state conditions apply (there is an effluent stream flowing out that needs to satisfy steady state conditions). The waste entering the lagoon has a concentration of 10 mg/L.Assuming complete mixing conditions, what would the concentration of the pollutant be in the effluent leaving the lagoon?

Q: The treated domestic sewage of a town is to be discharged in the natural stream in whic minimum flow…

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Q: Suppose a wastewater has a BOD5 equal to 180 mg/L and a reaction rate (k) equal to 0.22/day. Find…

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Q: A municipal wastewater flow of 1,000 m³/d contains 400 mg/L BOD5 and is treated to be in a trickling…

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Q: 10.13 m3/s and a BOD of its own equal to 5.5 mg/l. The deoxygenation constant, Kd, is…

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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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Q: A river has ultimate BOD of 60 mg/L, a width of 20 m, a depth of 5 m and a flow rate of 9 m3/s. A…

A: The given data is shown below: BOD=60 mg/LWidth=20 mDepth=5mFlow rate=9 m3/sTemperature=20°CUltimate…

Q: An existing single-stage rock trickling filter treats a wastewater flow of 3785 m/d ("raw" influent…

A: Consider the given data Q=3785 m3/dBOD5i=240 mg/LBOD5e=65 mg/LR=0,  F=1 1.} E1=1001+0.532W1V1F1…

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: A pollutant entered into a confined aquifer of 5 m thick and porosity 25%. If the seepage discharge…

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Q: A factory with a wastewater flow of 0.011 m/s and a BODS of 590 mg/L discharges into a small stream.…

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Q: problem 4: A wastewater treatment plant with an average daily flow of 0.25 m³/s must meet 30 mg/L of…

A: Part e) is not in your question but if you want it then only write otherwise leave that.

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: (a) Using a clearly annotated diagram, describe the major processes in a tertiary level wastewater…

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Q: A conventional activated-sludge system treats 11,000 m3/day of wastewaterin an aeration tank with a…

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

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Q: (a) What is the maximum contaminant concentration that is expected at a location 2 km downstream of…

A: a) - Discharge(Q) = 2m3/s B= 5m    D= 1m  Velocity = QB*D V= 25*1 = 0.4m/s Time taken to travel…

Q: 250 lbs. of contaminated soil containing 0.500 g of a pollutant per kilogram of soil will be treated…

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Q: The saturation DO concentration of a stream is 9.1 mg/L. At a sewage outfall, the DO of the stream…

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Q: A lagoon with a volume of 1500 m3 reieves an industrial wastewater flow of 100 m3/day containing a…

A: Volume = 1500 m3 Waste water flow = 100m3/day Concentation =  mg/l

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

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Q: Assume that the primary sedimentation process in this treatment facility removes 60% of the…

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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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Q: A river before its entry into a town had a discharge of 200 litres per second and 30 mg/las the…

A: Discharge = 200 l/sconcentration = 30 mg/lwastewater discharge = 250 mg/lconcentration = 75 mg/lTo…

Q: Wastewater that has a volumetric flow rate of 0.4 m3 /s and an ultimate BOD of 25.0 mg/L is flowing…

A: wastewater that has a volumetric flow rate of 0.4 m3 /sultimate BOD of 25.0 mg/L flowing into a…

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

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

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Q: Assume that DLSUD lake is 100m2 and its average height is 5ft. Wastewater that flows into the lake…

A: Given :

Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.