Three streams are mixing at a junction. The flow rate and total dissolved solids (TDS, a conservative pollutant) for each is presented in the table below. An industry is discharging 800 cfs downstream of the junction. If the TDS concentration in the stream cannot exceed 250 mg/L, calculate the maximum concentration (in mg/L TDS) allowable in the industry effluent if steadystate conditions apply. Stream    Flow (cfs)     TDS (mg/L) 1                500                  60 2                700                  50 3              1,000                 75

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

A:

Q: P.C. V, X, S S.C. Qs Xg, Sp Act. Sludge Basin RAS Q, S, Xp WAS Qw, Sun Xw

A: 1. V=5222 m3   2. Qw=121.8 m3/day   3. Qe=25798.2 m3/day   4. t=4.8 hours

Q: In a certain situation, waste water having dissolved oxygen of 2.36 mg/lt is discharged at 1.25…

A:

Q: A river with a flowrate (Q) of 850 cfs (cubic feet per second) has a total dissolved solids (TDS,…

A: Given, Flow rate of river, Q = 850 cfc= 850 ft3/sec TDS of river, say C =55 mg/L   TDS of discharge…

Q: For an activated sludge basin with a flow rate of 500 L/s if the influent BOD5 = 100 mg/L, the MLVSS…

A: Given data: Flow rate of the sludge basin = 500 L/s Influent BOD5 = 100 mg/L MLVSS (X) = 3000 mg/L…

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: A storm sewer is mixed into a small streams. the stream before the mixing point has a NaCl…

A:

Q: If a contaminant is spilled in the area where an aquifer refills/receives its water from then the…

A: Whenever man-made substances like chemicals, oil, road salts, and gasoline contaminate groundwater,…

Q: A completely mixed activated sludge process is being designed for a wastewater flow of 3 MGD using…

A: Q=3 MGD Influent soluble BOD=180 mg/L Effluent soluble BOD=10 mg/L The mean cell residence time () =…

Q: Raw water from Lake Limpid is treated via direct filtration and disinfection to supply 0.26 m³/s (5…

A: In order to render raw water or wastewater safe for human consumption or to safeguard the…

Q: The chloride concentration in a brine waste flow of 6.3 L/s is 15000 mg/L. The river flow upstream…

A: step 1-

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: Hydraulic conductivity K= 100 ft/day, Aquifer thickness B = 50ft, Hydraulic gradient J = 0.001 Plume…

A: Co-efficient of Permeability , K=100ft/d Aquifer Thickness , B=50 ft Hydraulic Gradient , j=0.001

Q: Wastewater with DO concentration of 2 mg/L is discharged to a river. The temperature of the river is…

A:

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…

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

Q: A manufacturing facility that manufactures printed circuit boards puts wash water that was used to…

A:

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

A:

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: 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: A complete mixed activated sludge process (CMAS) is to be designed to treat 5MGD of primary effluent…

A: To determine the minimum MCRT, we can use the following equation: MCRTmin = 1 / kd MCRTmin = 1 /…

Q: A primary wastewater treatment uses centrifugation for dewatering of primary sedimentation sludge.…

A: Given :- Average daily flow to the treatment plant = 5000 m3/d Total suspended solids in raw waste…

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.