Heat treatment involves heating of the sludge. The supernatant from the heat treatment system is rich in ___________

Heat treatment involves heating of the sludge. The supernatant from the heat treatment system is rich in ___________ Correct Answer BOD

The supernatant is rich in BOD. Thus this requires to be recycled to the treatment plant in order to be treated again. Heat treatment of the sludge is done in order to condition the sludge.

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