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Microbes in Human Welfare — BIOLOGY STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceBIOLOGYMicrobes in Human Welfare2 Marks
Question
Explain the different steps involved during primary treatment phase of sewage.
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Answer

Physical removal of particles (large and small), mutualism by filtration and sedimentation, forming primary sludge/sedimented solids, forming effluent (supernatant) for secondary treatment.

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