Advertisements
Advertisements
Question
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
Advertisements
Solution
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.
APPEARS IN
RELATED QUESTIONS
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 function of “anaerobic sludge digester” in a sewage treatment plant.
Distinguish between the roles of flocs and anaerobic sludge digesters in sewage treatments.
Explain the process of sewage water treatment before it can be discharged into natural water bodies.
What is the key difference between primary and secondary sewage treatment?
Answer the following question.
Secondary treatment of the sewage is also called Biological treatment. Justify this statement and explain the process.
Why is this sewage water treatment essential?
After which of the following process effluents from anaerobic sludge digesters are released in natural water bodies?
In the process of biogas production which of the following anaerobic bacteria are used?
Identify the INCORRECT statement with respect to sewage treatment.
What happens during the course of sewage decomposition?
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?
Methanogenic bacteria are not found in ______.
The primary treatment of waste water involves the removal of ______.
What would happen if oxygen availability to activated sludge flocs is reduced?
In a sewage treatment plant, grit comprising soil and small pebbles is removed during which stage and process?
Which mixture of gases is collectively produced as biogas during anaerobic sludge digestion?
Which bacterium is an example of a methanogen commonly found in anaerobic sludge during sewage treatment?
