Secondary sewage treatment is mainly a:...

Secondary sewage treatment is mainly a:

physical process

mechanical process

chemical process

biological process

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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.

Why do we prefer to call secondary waste water treatment as biological treatment?

Study the given differences between primary sludge and activated sludge and select the incorrect ones. Primary Sludge Activated sludge (i) It is sludge formed during primary sewage treatment. It is sludge formed during secondary sewage treatment. (ii) It possesses flocs of decomposer microbes. It does not possess flocs of decomposer microbes. (iii) It does not require aeration. Formation of activated sludge requires aeration. (iv) A lot of decomposition occurs during formation of primary sludge. Very little decomposition occurs during formation of activated sludge.

Secondary treatment of sewage

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

in which stage of sewage treatment is desallination and chlorination of water done ?

Secondary treatment in sewage treatment is Physical Chemical Biological None of these

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

What is the key difference between primary and secondary sewage treatment?

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