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प्रश्न
Discuss about the major programs that the Ministry of Environment and Forests, Government of India, has initiated for saving major Indian rivers from pollution.
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उत्तर
The untreated sewage is often discharged directly into rivers leading to their pollution and increase in water-borne diseases. The Ministry of Environment and Forests has initiated Ganga Action Plan and Yamuna Action Plan to save these major rivers of our country from pollution. Under these plans, it is proposed to build a large number of sewage treatment plants so that only treated sewage may be discharged into the rivers.
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संबंधित प्रश्न
Explain the role of microbes in 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 _________.
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.
In which of the following microbial digestion of organic wastes of sewage takes place?
After which of the following process effluents from anaerobic sludge digesters are released in natural water bodies?
Which of the following occurs during tertiary treatment?
In the process of biogas production which of the following anaerobic bacteria are used?
Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.
Identify the INCORRECT statement with respect to sewage treatment.
______ refers to the organic matter which settles down after physical treatment of sewage.
Nitrogen fixation by organisms requires conditions that are:
BOD of waste water is estimated by measuring the amount of ______.
Ganga has recently been declared the national river. Discuss the implication with respect to pollution of this river.
What would happen if a large volume of untreated sewage is discharged into a river?
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)?
What happens to the polluting potential of wastewater as its Biochemical Oxygen Demand (BOD) increases?
