Wastewater with DO concentration of 2 mg/L is discharged to a river. The temperature of the river is 10°C and the river is saturated with oxygen (11.33 mg/L). The flow rate of the river is 3.0 m³/s. The temperature and flow rate of the wastewater are 20°C and 0.3 m³/s, respectively. The temperature of the river after mixing is 11°C. The oxygen saturation level at that temperature is 11.08 mg/L.

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: 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 wastewater contains 7.5 x 105 fecal CFU per liter. The maximum permissible fecal coliform…

A: Given: Initial coliform concentration, Co = 7.5 x 105 CFU/L Maximum permissible coliform…

Q: At the point of mixing of a river and a wastewater point discharge, DO is 5.5 mg/L and DOs is 10.1…

A: It is required to find critical deficit of DO and minimum DO. Critical time of DO deficit and…

Q: A factory is discharging its wastewater into a slowly moving stream that has a mean velocity of 3…

A: Dissolved oxygen sag curve

Q: The stream shown below has a flow of 28,000 m³/d, and a cross-sectional area of 35 m². The stream is…

A: k1=0.18/day for BOD assimilation in the riverk3=0.01/day for BOD sedimentation in the…

Q: Three streams are mixing at a junction. The flow rate and total dissolved solids (TDS, a…

A:

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: You have a DAF with wastewater flow of 650 L/min, with a solids concentration of 15 g/L. Density of…

A: Given: Wastewater flow rate, Q = 650L/min Solids concentration = 15g/L Density of the wastewater =…

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

A:

Q: 2. A lake has a volume of 9 million m³ and an average depth of 3 m. There is an influent stream…

A:

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: The City of Smyrna discharges 0.16 m3/s of treated wastewater into Chattahoochee River. The BOD5 for…

A: Discharge of sewage Qs=0.16 m3/s Discharge of river, QR=0.16 m3/s BOD5 of sewage, =30 mg/L BOD5 of…

Q: Drainage from a former pesticide manufacturing site enters Bear River at river kilometer 240. The…

A: Cin = 5 μgm/L P = 15000  t1/2 = 70 days V = 5 cm/s or 0.05m/s

Q: A treatment plant treats water at an average daily flowrate of 2.7 m3/s. The water is chlorinated…

A: Given data,average daily flowrate of 2.7 m3/sChlorine concentration = 3 mg/LChlorine decays at a…

Q: - An aerobic digester with a total capacity of 50,000 ft³ stabilize waste-activated sludge from an…

A:

Q: You are building a wastewater lagoon with an inlet/outlet flow rate of 3,100 m3/day. The BOD inlet…

A: Answer ) To determine the volume of the lagoon required, we can use the following formula:      V =…

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.