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प्रश्न
What would happen if a large volume of untreated sewage is discharged into a river?
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उत्तर
It untreated sewage is discharged directly into rivers it will lead to serious pollution of the waters with organic matter and pathogenic bacteria, Protozoa and many other diseases. This water, if used will cause outbreaks of water-borne diseases.
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संबंधित प्रश्न
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.
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.
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.
Which of the following is TRUE about primary treatment?
______ refers to the organic matter which settles down after physical treatment of sewage.
In the process of sewage treatment, the activated sludge is digested by ______
During sewage, treatment biogas is produced wits which include:
Which of the following is put into Anaerobic sludge disaster for further sewage treatment?
Methanogenic bacteria are not found in ______.
In a sewage treatment plant, all of the following processes belong to secondary treatment except:
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
Activated sludge should have the ability to settle quickly so that it can ______.
Name the states involved in Ganga action plan.
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
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 ______.
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.
