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Study the following statements and selec...

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.

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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.

Physical removal of large and small particle from the sewage through filtration and sedimentation is called

Physical removal of large and small particle from the sewage through filtration and sedimentation is called

Physical removal of large and small particles from the sewage through filtration and sedimentation is called

The step which incolves removal of small and large particles through giltration and sedimentation. I. Primary treatement II. Secondary treatment III. Biological treatment IV. Tertiary treatment

The primary treatment basically involves the physical removal of particles from the sewage through (A) filtration (B) sedimentation (C) microbial treatment (D) Both (A) and (B)

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.

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.

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.