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प्रश्न
Explain the role of microbes in sewage treatment.
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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 _________.
Why is this sewage water treatment essential?
The purpose of biological treatment of waste water is to ______.
Why do we prefer to call secondary waste water treatment as biological treatment?
What is the group of bacteria found in both the rumen of cattle and shidge of sewage treatment?
Why are flocs important in biological treatment of waste water?
Which of the following statement is correct for Sewage Treatment Plants (STPs)?
Explain the steps involved in preliminary treatment of sewage.
Biochemical Oxygen Demand (BOD) serves as an indirect measure of which water quality parameter?
Which mixture of gases is collectively produced as biogas during anaerobic sludge digestion?
