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ICSE Class 7 Answered

What is sludge? Explain how it is treated
Asked by reddy.ruthvik1 | 18 Apr, 2021, 02:34: PM
Expert Answer
Solid faecal matter which is generated after the water treatment plant is known as sludge.
 
The sludge is transferred to a separate tank where it is decomposed by anaerobic bacteria. The biogas produced can be used as a fuel and the dried sludge is used as a manure for replenishing the nutrients of the soil.
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