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प्रश्न
The purpose of biological treatment of waste water is to ______.
विकल्प
Reduce BOD
Increase BOD
Reduce sedimentation
Increase sedimentation
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उत्तर
The purpose of biological treatment of waste water is to Reduce BOD.
संबंधित प्रश्न
Explain the process of sewage water treatment before it can be discharged into natural water bodies.
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?
After which of the following process effluents from anaerobic sludge digesters are released in natural water bodies?
Study the following statements regarding tertiary treatment of sewage and choose the correct option.
i. It produces methane gas.
ii. The effluents formed from these plants undergo chlorination.
iii. BOD is significantly increased at this step.
iv. It includes screening and passage of effluent through grit chamber.
Methanogenic bacteria are not found in ______.
In which of the following step large and small particles are removed from sewage through sequential filtration and sedimentation?
Why do we prefer to call secondary waste water treatment as biological treatment?
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
Which one is wrongly matched?
What is the primary purpose of chlorination in the tertiary treatment of wastewater?
