How is sludge useful after its treatment
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Answer:
it is used as a fertilizer to grow crop
Explanation:
after sludge dries it is useful as fertilizer to grow crop the gas of this sludge is called global gas
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Explanation:Sewage sludge treatment describes the processes used to manage and dispose of sewage sludge produced during sewage treatment. Sludge is mostly water with lesser amounts of solid material removed from liquid sewage. ... Reducing sludge volume may increase the concentration of some of these toxic chemicals in the sludge.
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