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प्रश्न
BOD of waste water is estimated by measuring the amount of ______.
पर्याय
total organic matter
biodegradable organic matter
oxygen evolution
oxygen consumption
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उत्तर
BOD of waste water is estimated by measuring the amount of oxygen consumption.
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संबंधित प्रश्न
Explain the role of microbes in sewage treatment.
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?
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?
Answer the following question.
What are 'flocs', formed during secondary treatment of sewage?
One of the free-living anaerobic nitrogen-fixer is _________.
Small part of activated sludge is passed back into primary sedimentation tank.
If the above statement is correct then rewrite as it is and in case it is incorrect then reframe it.
Rearrange the names of tanks used in sewage treatment as per the flow of the procedure.
- Settling tank
- Grit Chamber
- Aeration tanks
- Primary sedimentation tank.
After which of the following process effluents from anaerobic sludge digesters are released in natural water bodies?
Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.
Which of the following occurs during secondary treatment?
During sewage, treatment biogas is produced wits which include:
Methanogenic bacteria are not found in ______.
In a sewage treatment plant, all of the following processes belong to secondary treatment except:
Ganga has recently been declared the national river. Discuss the implication with respect to pollution of this river.
In what way anaerobic sludge digestion is important in sewage treatments?
Given below is the flowchart of sewage treatment. Identify A, B, C, D and E and select the correct option.

Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from ______.
Which of the following statement is correct for Sewage Treatment Plants (STPs)?
During primary sewage treatment, floating debris is separated by which physical process?
