only activated sludge process
How is activated sludge process carried out for the treatment of waste water? Explain with flow sheet diagram.
What is activated sludge? How is the process carried out for treatment of waste water? Explain with a flow sheet diagram.
20 ml sample of waste water was refluxed with 30 ml of potassium dichromate solution and after refluxing the excess unreacted dichromate required 11 ml of 0.1 N FAS solution . Blank of 20 ml of distilled water on refluxing with 30 ml of dichromate solution required 14 ml of 0.1 N FAS solution . Calculate the COD value of waste water .