Sewage Treatment | Microbes in Human Welfare | Biology | Khan Academy
Channel: Khan Academy India - English
Date: 2022-08-30

In this video, we find out what really happens after you flush down last night's dinner. We discover the importance of microbes in sewage treatment and how we have shaped a critical process around it.

Timestamps:
00:00 Introduction
00:51 Primary treatment
03:32 Secondary treatment and BOD
09:11 Sludge digestion

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