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प्रश्न
The primary treatment of waste water involves the removal of ______.
पर्याय
dissolved impurities
stable particles
toxic substances
harmful bacteria
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उत्तर
The primary treatment of waste water involves the removal of stable particles.
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संबंधित प्रश्न
Explain the role of microbes in sewage treatment.
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.
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?
Answer the following question.
Secondary treatment of the sewage is also called Biological treatment. Justify this statement and explain the process.
Due to which of the following reason/s sewage water cannot be discharged directly into river?
Which of the following is TRUE about primary treatment?
Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.
Into which of the following the sewage water is pumped after preliminary treatment?
Identify the INCORRECT statement with respect to sewage treatment.
After which of the following treatment BOD of the effluent is significantly reduced?
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?
Study the given diagram of the Sewage Treatment Plant (S.T.P.) and answer the question that follows:
- Which one of the two 'S.T.P.' (A) or (B) will be more effective in treating the human excreta in municipal waste?
- Write the steps followed in carrying the treatment of the sewage in step (Z), once the BOD of sewage is reduced significantly till it is passed on to the "anaerobic sludge digesters".
Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from ______.
Explain the steps involved in preliminary treatment of sewage.
What are 'flocs' in the context of biological wastewater treatment?
Which mixture of gases is collectively produced as biogas during anaerobic sludge digestion?
