Download Class 7 Science Chapter 18 Revision Notes PDF Free - Full Version
Download Class 7 Science Chapter 18 Revision Notes by ['Amandeep Chohan'] in PDF format completely FREE. No registration required, no payment needed. Get instant access to this valuable resource on PDFdrive.to!
About Class 7 Science Chapter 18 Revision Notes
The document discusses wastewater treatment and sewage. It explains that sewage is liquid waste produced by homes, industries, and stormwater runoff that contains bacteria and pollutants. Sewage is collected through sewer pipes and sent to a wastewater treatment plant where it undergoes physical, chemical, and biological processes to remove pollutants before being discharged into water bodies. These treatment processes include screening to remove large objects, settling solids, and using aerobic bacteria to break down unwanted matter. The document also discusses the importance of sanitation and proper sewage disposal to prevent the spread of diseases and pollution of water sources.
Detailed Information
| Author: | ['Amandeep Chohan'] |
|---|---|
| Publication Year: | 2023 |
| Pages: | 3 |
| Language: | English |
| Format: | |
| Price: | FREE |
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