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प्रश्न
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
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उत्तर
Organic matter in wastewater consumes a lot of oxygen to carry on various biological processes. It results in reduction of oxygen level. In the surrounding air and thus can Increase air pollution. Consumption of oxygen by organic matter in wastewater is measured by BOD (Biochemical Oxygen Demand). A higher level of BOD indicates a higher polluting potential of wastewater. It is important to reduce the BOD so that pollution can be reduced. Hence, aerobic degradation is more important than anaerobic degradation for the treatment of large volumes of wastewaters rich in organic matter. BOD level is reduced by aerobic degradation which is carried out by floc. Flocs are associations of bacteria and fungi which form mesh-like structures. Flocs eat away most of the organic matter in wastewater and thus help in reducing BOD. Once BOD Is pulled down below a threshold level the sludge is ready for anaerobic degradation.
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संबंधित प्रश्न
Explain the different steps involved during primary treatment phase of sewage.
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 process of sewage water treatment before it can be discharged into natural water bodies.
Why is this sewage water treatment essential?
Name the tank to which the sewage water is passed after the preliminary treatment?
Which of the following is TRUE about primary treatment?
Which of the following occurs during tertiary treatment?
In the process of biogas production which of the following anaerobic bacteria are used?
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.
In the process of sewage treatment, the activated sludge is digested by ______
During sewage, treatment biogas is produced wits which include:
In a sewage treatment plant, all of the following processes belong to secondary treatment except:
In which of the following step large and small particles are removed from sewage through sequential filtration and sedimentation?
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
Why do we prefer to call secondary waste water treatment as biological treatment?
Discuss about the major programs that the Ministry of Environment and Forests, Government of India, has initiated for saving major Indian rivers from pollution.
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.
After a significant reduction in the BOD of wastewater, it is passed into a settling tank where bacterial flocs are allowed to sediment. This sediment is called ______.
