Question
Complete the following conceptual picture :
Image

Answer

After sewage is processed using microbial treatment (Biotechnology), it can be utilized in the following four ways:
Biogas Production: Methane gas can be obtained, which is used as a fuel.
Manure: The sludge settled at the bottom can be used as high-quality organic fertilizer for agriculture.
Clean Water: The treated water is environmentally safe and can be released into water bodies or used for irrigation.
Electricity Generation: The biogas produced can be used to generate heat or electrical energy.

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