Chapter 10: Wastewater Story

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Wastewater Story

Question:

What is sludge? Explain how it is treated.

Answer:

Sludge is defined as solid waste (like human faeces) that settle at the bottom of the sedimentation tank and are removed by scrapers. Sludge is transferred to a separate tank where it is decomposed by anaerobic bacteria to produce biogas. Biogas is used to fuel or can be used to produce electricity.


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