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प्रश्न
In what way anaerobic sludge digestion is important in sewage treatments?
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उत्तर
In anaerobic sludge digestion, anaerobic bacteria, digest the aerobic bacteria and the fungi in the sludge and the remaining organic matter. During this digestion, bacteria produce a mixture of gases such as methane, hydrogen sulphide and carbon dioxide. These gases (biogas) can be used as a source of energy as it is inflammable.
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संबंधित प्रश्न
Explain the different steps involved during primary treatment phase of sewage.
Explain the function of “anaerobic sludge digester” in a sewage treatment plant.
Distinguish between the roles of flocs and anaerobic sludge digesters in sewage treatments.
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 _________.
Rearrange the names of tanks used in sewage treatment as per the flow of the procedure.
- Settling tank
- Grit Chamber
- Aeration tanks
- Primary sedimentation tank.
Due to which of the following reason/s sewage water cannot be discharged directly into river?
Which of the following is TRUE about primary treatment?
Which of the following is/are found in discharge from industrial waste?
Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.
Identify the INCORRECT statement with respect to sewage treatment.
______ refers to the organic matter which settles down after physical treatment of sewage.
Which of the following is TRUE regarding 'Flocs'?
Methanogenic bacteria are not found in ______.
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
Activated sludge should have the ability to settle quickly so that it can ______.
Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from ______.
Which of the following statement is correct for Sewage Treatment Plants (STPs)?
