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प्रश्न
What is sewage? In which way can sewage be harmful to us?
उत्तर
Sewage is a collective word for municipal waste water (both liquid and solid wastes) generated in cities and towns and taken away in sewers. Chemically, sewage is made up of around 99% water and 1% solid waste, which includes both inorganic and organic stuff. Sewage contains bacteria (coliforms, streptococci, clostridia, lactobacilli), microfungi, protozoa, and microalgae. Proper sewage disposal is critical because untreated sewage in rivers and other bodies of water can be hazardous in the following ways:
- It leads to the spread of waterborne diseases caused by bacteria.
- It could reduce the dissolved oxygen (DO) in water. Reduced oxygen availability has the potential to kill aerobic aquatic bacteria.
- Untreated sewage generates an unpleasant smell.
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संबंधित प्रश्न
Explain the different steps involved during primary treatment phase of sewage.
What is the key difference between primary and secondary sewage treatment?
Describe how do 'flocs' and 'activated sludge' help in Sewage Treatment.
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.
The purpose of biological treatment of waste water is to ______.
After which of the following process effluents from anaerobic sludge digesters are released in natural water bodies?
Small part of activated sludge is passed back into ______ and major part is pumped into large tanks called ______.
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 ______
Which of the following is put into Anaerobic sludge disaster for further sewage treatment?
BOD of waste water is estimated by measuring the amount of ______.
What is the group of bacteria found in both the rumen of cattle and shidge of sewage treatment?
Why is aerobic degradation more important than anaerobic degradation for the treatment of large volumes of waste waters rich in organic matter. Discuss.
Discuss about the major programs that the Ministry of Environment and Forests, Government of India, has initiated for saving major Indian rivers from pollution.
In what way anaerobic sludge digestion is important in sewage treatments?
Given below is the flowchart of sewage treatment. Identify A, B, C, D and E and select the correct option.
