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प्रश्न
Small part of activated sludge is passed back into primary sedimentation tank.
If the above statement is correct then rewrite as it is and in case it is incorrect then reframe it.
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उत्तर
Small part of activated sludge is passed back into the aeration tank.
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संबंधित प्रश्न
Three water samples namely river water, untreated sewage water and secondary effluent discharged from a sewage treatment plant were subjected to BOD test. The samples were labelled A, B and C; but the laboratory attendant did not note which was which. The BOD values of the three samples A, B and C were recorded as 20 mg/L, 8 mg/L and 400 mg/L, respectively. Which sample of the water is most polluted? Can you assign the correct label to each, assuming the river water is relatively clean?
One of the free-living anaerobic nitrogen-fixer is _________.
Name the tank to which the sewage water is passed after the preliminary treatment?
In which of the following microbial digestion of organic wastes of sewage takes place?
Which of the following is TRUE about primary treatment?
Which of the following is/are found in discharge from industrial waste?
Which of the following occurs during secondary treatment?
______ refers to the organic matter which settles down after physical treatment of sewage.
In what way anaerobic sludge digestion is important in sewage treatments?
Study the given diagram of the Sewage Treatment Plant (S.T.P.) and answer the question that follows:
- Which one of the two 'S.T.P.' (A) or (B) will be more effective in treating the human excreta in municipal waste?
- Write the steps followed in carrying the treatment of the sewage in step (Z), once the BOD of sewage is reduced significantly till it is passed on to the "anaerobic sludge digesters".
