Question

0.17) Explain the process of sewage treatment before it can be discharged in to natural
bodies ? Add a note on biofortification​

Answer 1

Answer:

Primary treatment: These treatment steps involve physical removal of particles from the sewage through filtration and sedimentation. These are removed in stages; initially, floating debris is removed by sequential filtration. Then the grit (soil and small pebbles) are removed by sedimentation. All solids that settle form the primary sludge,and the supernatant forms the effluent. The effluent from the primary settling tank is taken for secondary treatment. During secondary treatment, the primary effluent is passed into large aeration tanks

Explanation:

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