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The biochemical treatment of sewage effluents is essentially a process of
Which of the following processes is involved in the biochemical treatment of sewage effluents?
Statement : Drinking water supply to New Bombay has been suspended till further orders from Maharashtra Pollution Control Board following pollution of Patalganga river, caused by discharge of effluents from some chemical industries.

Courses of Action :
I. The industries responsible for discharging effluents into the river should be asked to close down immediately.
II. The river water should immediately be treated chemically before resuming supply.
III. The Pollution Control Board should check the nature of effluents being discharged into the river by industries at regular intervals.
Which of the following characterizes biochemical treatments of sewage effluents?
Which of the following represents biochemical treatments of sewage effluents?
During sewage treatment, the sewage is subjected to __________ treatment in Imhoff tank.
In the question below is given a statement followed by two courses of action numbered I and II. You have to assume everything in the statement to be true and on the basis of the information given in the statement, decide which of the suggested course of action logically follow(s) for pursuing. Statement: Bacteria is very helpful in sewage treatment. Courses of Action: I: The people should avoid adding bacteria during sewage treatment. II: Anaerobic bacteria break down sludge and they produce methane gas.
The pH of water sample collected from a river was found to be acidic in the range of 3.5 – 4.5. On the banks of the river were several factories that were discharging effluents into the river. The effluents of which one of the following factories is the most likely cause for lowering the pH of river water?
Fine grit present in sewage is removed in the __________ during sewage treatment.
__________ substances present in sewage are removed in grit chamber during sewage treatment.