A lagoon with volume of 1200m3 has been receiving a steady flow of a  conservative waste at a rate of 100m3/d for a long enogh time to assume steady state conditions. The waste entering the lagoon has concentration of 10.0mg/l. Assume completly mixed conditions. a) What is the concentration of the pollutant in the efluent? b) The input was concentration of is suddenly increased to 100mg/l. Using sprreadsheet, compute and graph the concentration in the effluent over time. Show hand calculation for the effluent concentration 7 days after the change inpute waste concentration

Q: Consider a well-mixed aeration lagoon to remove BOD from a waste stream flowing at 5 MGD. The lagoon…

A: Data given: Discharge = 5 MGD Dimensions of lagoon Length (L) = 100 m Width (B) = 30 m Depth (D) = 3…

Q: It is estimated that the BOD of raw sewage received at a treatment plant serving a population 20,000…

A:

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: A dog food processing plant generates 0.015 m3/s of wastewater, which is treated using an activated…

A: A dog food processing plant generates 0.015 m3/s of wastewater, which is treated using an activated…

Q: 10 ml of wastewater is diluted to 1 liter, aerated, and sealed. The initial dissolved oxygen level…

A: Given that,Volume of waste water,Vs = 10 mlIt is diluted to 1 liter aerated and sealed.Initial…

Q: (h) If F/M is high, then i) Longer SRT iii) Better effluent quality ii) High yield iv) Microbes are…

A: (h)  (i)   (j)

Q: A trickling filter plant treats 1500 cum per day of sewage with a BOD5 of 220 mg/L and a suspended…

A:

Q: 12.60 The aeration tank for a completely mixed aeration process is being sized for a design waste-…

A: The objective of the question is to calculate the volume of the aeration tank, aeration period, food…

Q: A WWTP with activated sludge secondary treatment receives 0.290 m / s of flow from the primary…

A: Answer  We are given flow rate Qo = 0.290 m3/s  microbes concentration the aeration basin X = 2500…

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: 1. The influent suspended solids concentration to a primary settling tank is 435 mg/L. The average…

A: A primary settling tank (PST)-Influent suspended solids concentrations MLSS (Xt)=435 mg/L=435…

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: 2. The average wastewater flow from a community of 20,000 is 125 gpcd. The 5 day, 20 deg C BOD is…

A:

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: P to a secondary plant that The town of Gatesville has been directed to upgrade its primary" can…

A: Flow = 0.150m3.s-1BOD5 = 84.0mg.L-1 =100 mg.L-1Kd = 0.050day-1

Q: A flowing stream has a temperature of 14°C, flow rate of 3.0 m}sec, saturated dissolved oxygen…

A: since the given question has multiple sub parts therefore as per guidelines only first three parts…

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…

Thermal Processes

Some of the key areas where thermal processes find their application are: