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Secondary sewage treatment is mainly a...

Secondary sewage treatment is mainly a

A

mechanical process

B

chemical process

C

biological process

D

physical process

Text Solution

Verified by Experts

The correct Answer is:
C
In secondary or biological treatment of municipal waste, the organic matter is decomposed with the help of microbes. Decomposition of organic matter occurs by one of the three methods-water hyacinth pond, trickling filter method and activated sludge method. After decomposition the treated water is sterilized through chlorination and recycled.
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Study the following statements and select the incorrect ones. (i) Physical removal of large and small particles through filtration and sedimentation is called primary sewage treatment. (ii) Secondary sewage treatment is mainly a mechanical process. (iii) Activated sludge sediment in a sewage treatment plant is a rich source of aeroic bacteria. (iv) Biogas, commonly called as gobar gas, is pure methane.

Study the following statements and select the incorrect ones (i) Physical removeal of large and small particles through filtration and sedimentation is called primary sewage treamtent. (ii) Secondry sewage treatment is mainly a mechanical process (iii) Activated sludge sediment is a sewage treatement plant is a rich soruce of aerobic bactria.

Sewage is mainly a

What are flocs used in secondary sewage treatment?

Secondary treatment of sewage

Which of the following statement about sewage treatment is false?

Assertion : Secondary treatement of sewage is also called biological treatment while primary treatment is called physical treatment. Reason : Primary sewae treatment depends only upon sedimentation properies of materials present in sewage and filtration.

Filtration and Sedimentation are the sewage treatment steps involved in

Secondary treatment or biological treatment of waste or sewage is done by the :-

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