Biology · Sewage Treatment
Which of the following statements is true for Activated sludge?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1It absorbs colloidal organic matter directly without microbial action
- 2It can be discarded and aerobically digested completely
- 3It absorbs pathogenic bacteria present in wastewater while sinking to the bottom of the settling tank
- 4A part of it is pumped back from the settling tank to the aeration tank✓
Correct answer
A part of it is pumped back from the settling tank to the aeration tank
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