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प्रश्न
Explain the role of microbes in sewage treatment.
उत्तर
Microbes play a significant role during secondary and tertiary sewage treatment.
- During secondary treatment, primary effluent is continuously agitated in a large tank due to which vigorous growth of useful aerobic microbes into flocs takes place. These microbes consume major part of the organic matter in the effluent as they grow. Due to this, BOD of the effluent is significantly reduced.
- During tertiary treatment, bacterial flocs are allowed to sediment. Small part of it is passed back into the aeration tank and a large part is pumped into large tanks called anaerobic sludge digesters. These anaerobic bacteria digest the bacteria and fungi in sludge.
- Thus, use of microbes in sewage treatment helps to remove organic matter from waste water before it is discharged in water bodies like rivers.
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संबंधित प्रश्न
One of the free-living anaerobic nitrogen-fixer is _________.
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.
In which of the following microbial digestion of organic wastes of sewage takes place?
Which of the following is TRUE about primary treatment?
After which of the following treatment BOD of the effluent is significantly reduced?
In the process of sewage treatment, the activated sludge is digested by ______
Which of the following is put into Anaerobic sludge disaster for further sewage treatment?
What would happen if a large volume of untreated sewage is discharged into a river?
Given below is the flowchart of sewage treatment. Identify A, B, C, D and E and select the correct option.
Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from ______.
