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प्रश्न
Activated sludge should have the ability to settle quickly so that it can ______.
पर्याय
be rapidly pumped back from sedimentation tank to aeration tank
absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank
be discarded and anaerobically digested
absorb colloidal organic matter
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उत्तर
Activated sludge should have the ability to settle quickly so that it can be rapidly pumped back from sedimentation tank to aeration tank.
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संबंधित प्रश्न
Explain the role of microbes in sewage treatment.
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.
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?
Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.
Answer the following question.
What are ‘flocs’, formed during secondary treatment of sewage?
Which of the following is/are found in discharge from industrial waste?
During tertiary treatment, the bacterial floes sediment in the sedimentation tank, this sediment is called ____________.
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
Why are flocs important in biological treatment of waste water?
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
Discuss about the major programs that the Ministry of Environment and Forests, Government of India, has initiated for saving major Indian rivers from pollution.
Explain the steps involved in preliminary treatment of sewage.
In a sewage treatment plant, grit comprising soil and small pebbles is removed during which stage and process?
What are 'flocs' in the context of biological wastewater treatment?
What is the primary purpose of chlorination in the tertiary treatment of wastewater?
By what percentage does the decomposition of organic matter by aerobic bacteria in aeration tanks typically lower the BOD during secondary treatment?
