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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.
APPEARS IN
संबंधित प्रश्न
Explain the role of microbes in sewage treatment.
Explain the different steps involved during primary treatment phase of sewage.
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?
Which of the following occurs during secondary treatment?
Identify the INCORRECT statement with respect to sewage treatment.
______ refers to the organic matter which settles down after physical treatment of sewage.
After which of the following treatment BOD of the effluent is significantly reduced?
In the process of sewage treatment, the activated sludge is digested by ______
During sewage, treatment biogas is produced wits which include:
In which of the following step large and small particles are removed from sewage through sequential filtration and sedimentation?
What would happen if oxygen availability to activated sludge flocs is reduced?
Name the states involved in Ganga action plan.
What is the group of bacteria found in both the rumen of cattle and shidge of sewage treatment?
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?
