In a certain situation, wastewater discharged into a river,mixes with the river water instantaneously and completely. Following is the data available: Wastewater: DO = 2.00 mg/L Discharge rate = 1.10 m³/s River water DO = 8.3 mg/L Flow rate = 8.70 m³/s Temperature = 20°C nitial amount of DO in the mixture of waste and river shall be

Q: A sewage has a suspended solid contents as 250 mg/litre. The sedimentation tank removes 55% of the…

A: Suspended solid content =250 mg/litre The sedimentation tank removes 55% of the suspended solids and…

Q: A wastewater sample contains two nitrogen species, namely ammonia and nitrate. Consider the atomic…

A: Given, The atonic weight of N, H, and O as 14 g/mol, 1 g/mol and 16 g/mol respectively Concentration…

Q: A wastewater treatment plant must disinfect its effluent before discharging the wastewater to a…

A: Given data: Initial concentration of California colony (Co) = 5.5 x 105 CFU/L. Maximum California…

Q: One litre of sewage, when allowed to settle for 30 minutes gives a sludge volume of 27 cm³. If the…

A: Given data: The settled sludge volume, Vab=27 cm3lit=27 mllit Dry weight = 3 gm The concentration of…

Q: The wastewater having an organic concentration of 54 mg/l is flowing at a steady rate of 0.8 m³/day…

A: Given data- Organic concentration- Lo=54 mg/L,Q=0.8 m3/day,dimension 2 m×4 m×2 m.decay constant…

Q: A reactive chemical disposed of by dilution in a river dissipates at a uniform rate of 0.15 mg/l per…

A: The distance downstream in chemical residual persist is calculated by the following procedure.…

Q: If the BOD of a municipal wastewater at the end of 7 days is 60 mg/liter and the ultimate BOD is 85…

A:

Q: If the BOD3 of a wastewater sample is 75 mg/l and reaction rate constantk (base e) is 0.345 per day,…

A:

Q: A BOD test is run using 100 ml of treated waste H20 mixed with 200ml of pure water. The initial DO…

A: given volume of waste water(undiluted volume) =100 mL volume of pure/distilled water=200 ml Initial…

Q: A stream carries a flow of 700 m3 /day with TDS concentration of 650 mg/l. At a point, 35 m3 /day of…

A:

Q: rcent, suspended solids concentration in digested sludge fed to the centrifuge = 5.0 percent by…

A: Introduction- Diffusive thickening and dewatering is a high velocity process that utilizes the power…

Q: Meskhenet Stream has a negligible BOD and the initial deficit after the river and wastewater have…

A: The actual concentration of dissolved oxygen = 4.0 mg/Lsaturation concentration of dissolved oxygen…

Q: The 5-day, 20°C BOD of a wastewater (Ke = 0.23/day, 0 = 1.047) is 185 mg/L. What is the…

A:

Biological Processes

Biological solid waste includes bacterial and contaminated waste produced by living individuals. Its treatment is essential to prevent the spread of any air-borne or water-borne diseases or diseases transmitted from one organism to another in a food chain. There are many benefits of the biological solid waste treatment and some of them are: the minimized quantity of waste substance, waste control, eradicating any disease-causing pathogens, generation of biogas, composting, anaerobic digestion, bio drying, mechanical biological treatment, microbial fuel cell, phytoremediation, and biofiltration. The final products of the biological solid waste treatment may be recycled to obtain organic fertilizers or disposed of in SWDS (Solid Waste Disposal Site) after proper treatment.