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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
Distinguish between the roles of flocs and anaerobic sludge digesters in sewage treatments.
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.
What is primary treatment of sewage?
Removal of large pieces of floating debris, oily substances, etc. during sewage treatment is called _______________.
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.
The purpose of biological treatment of waste water is to ______.
In which of the following microbial digestion of organic wastes of sewage takes place?
Identify the type of microorganisms involved in floe formation during sewage treatment.
During sewage, treatment biogas is produced wits which include:
Which of the following is put into Anaerobic sludge disaster for further sewage treatment?
Wastewater treatment generates a large quantity of sludge, which can be treated by ______.
BOD of waste water is estimated by measuring the amount of ______.
Activated sludge should have the ability to settle quickly so that it can ______.
Why are flocs important in biological treatment of waste water?
Discuss about the major programs that the Ministry of Environment and Forests, Government of India, has initiated for saving major Indian rivers from pollution.
Which one is wrongly matched?
Explain the steps involved in preliminary treatment of sewage.
Which action plans were initiated by the Ministry of Environment and Forests to construct sewage treatment plants and protect major Indian rivers from pollution?
By what percentage does the decomposition of organic matter by aerobic bacteria in aeration tanks typically lower the BOD during secondary treatment?
