Question

sewage after processing
4 points in small

Answer 1

1. save water

2. use of salary as fertilize

3. used in biogas plant

4. cleaning

I hope it may help you

Answer 2

For most cities, the sewer system will also carry a proportion of industrial effluent to the sewage treatment plant which has usually received pre-treatment at the factories themselves to reduce the pollutant load. If the sewer system is a combined sewer then it will also carry urban runoff (stormwater) to the sewage treatment plant. Sewage treatment is the process of removing contaminants from municipal wastewater, containing mainly household sewage plus some industrial wastewater. ...

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