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प्रश्न
The purpose of biological treatment of waste water is to ______.
पर्याय
Reduce BOD
Increase BOD
Reduce sedimentation
Increase sedimentation
उत्तर
The purpose of biological treatment of waste water is to Reduce BOD.
संबंधित प्रश्न
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 20mg/L, 8mg/L and 400mg/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?
What is primary treatment of sewage?
Removal of large pieces of floating debris, oily substances, etc. during sewage treatment is called _______________.
Name the chamber in which the suspended objects are filtered and removed during sewage treatment?
After which of the following process effluents from anaerobic sludge digesters are released in natural water bodies?
Which of the following is/are found in discharge from industrial waste?
Into which of the following the sewage water is pumped after preliminary treatment?
Identify the INCORRECT statement with respect to sewage treatment.
What happens during the course of sewage decomposition?
______ refers to the organic matter which settles down after physical treatment of sewage.
During tertiary treatment, the bacterial floes sediment in the sedimentation tank, this sediment is called ____________.
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.
After which of the following treatment BOD of the effluent is significantly reduced?
Which of the following is TRUE regarding 'Flocs'?
In the process of sewage treatment, the activated sludge is digested by ______
Activated sludge should have the ability to settle quickly so that it can ______.
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?
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".
Which one is wrongly matched?
Biochemical Oxygen Demand (BOD) may not be good index for pollution for water bodies receiving effluents from ______.
The aeration tank of a sewage treatment plant is not functioning properly. Explain in detail the impact of this on the treatment of sewage and BOD of the effluent.
Explain the steps involved in preliminary treatment of sewage.
