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प्रश्न
Methanogenic bacteria are not found in ______.
विकल्प
rumen of cattle
gobar gas plant
bottom of water-logged paddy fields
activated sludge
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उत्तर
Methanogenic bacteria are not found in activated sludge.
Explanation:
Methanogenic bacteria are not found in activated sludge because they can survive and function only under anaerobic (oxygen-free) conditions.
Activated sludge is an aerobic process, where oxygen is supplied for the breakdown of organic matter, so methanogens cannot grow there; they are instead found in anaerobic digesters used for sludge treatment.
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संबंधित प्रश्न
Explain the process of secondary treatment given to the primary effluent up to the point it shows significant change in the level of biological oxygen demand (BOD) it.
Explain the function of “anaerobic sludge digester” in a sewage treatment plant.
What is the key difference between primary and secondary sewage treatment?
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?
What is primary treatment of sewage?
Answer the following question.
What are 'flocs', formed during secondary treatment of sewage?
Why is this sewage water treatment essential?
Name the tank to which the sewage water is passed after the preliminary treatment?
What are flocs with respect to sewage treatment?
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.
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.
Which of the following is TRUE about primary treatment?
Which of the following is/are found in discharge from industrial waste?
Into which of the following the sewage water is pumped after preliminary treatment?
After which of the following treatment BOD of the effluent is significantly reduced?
The primary treatment of waste water involves the removal of ______.
BOD of waste water is estimated by measuring the amount of ______.
What would happen if oxygen availability to activated sludge flocs is reduced?
Activated sludge should have the ability to settle quickly so that it can ______.
Why do we prefer to call secondary waste water treatment as biological treatment?
Name the states involved in Ganga action plan.
What is the group of bacteria found in both the rumen of cattle and shidge of sewage treatment?
Ganga has recently been declared the national river. Discuss the implication with respect to pollution of this river.
Which one is wrongly matched?
Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from ______.
Explain the steps involved in preliminary treatment of sewage.
