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The sediment of ……………… is called activat...

The sediment of ……………… is called activated sludge.

A

aeration tank

B

anaerobic slude digesters

C

settling tank

D

aerobic sludge digesters

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What is activated sludge ?

Select the correct statement regarding activated sludge formed during secondary sewage 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.

What is activated complex ?

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.

What would happen if oxygen availability to activated sludges flocs is reduced ?

The energy needed to form the intermediate called activated complex is known as activation energy. (State True/False)