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Primary vs Activated Sludge...

Primary vs Activated Sludge

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Activated sludge contains

Activated sludge contains

What is activated sludge ?

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 required aeration"),((iv)"A lot of decomposition occurs during formation of primary sludge","Very little decomposition occurs during formation of activated sludge"):}

Assertion (A): Activated sludge should have the ability to settle quickly. Reason (R): To absorb pathogenic bacteria present in waste water while sinking to the bottom of the settling tank.

Small part of activated sludge is passed back into primary sedimentation tank. If the above statement is correct then rewrite as it is and in case it is incorrect then reframe it.

After secondary treatment, a part of activated sludge is passes back to aeration tank as inoculum while most of the part of activated sludge passed to

Which of the following is True/false A small part of activated sludge is pumped into large tank called anaerobic sludge digesters.

Describes how biogas is generated from activated sludge. List the components of biogas.

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