What are the various constituents of domestic sewage? Discuss the effects of sewage discharge on a river.

Explanation

### Step-by-Step Text Solution

**Step 1: Understanding Domestic Sewage**
Domestic sewage refers to wastewater generated from households, which includes water from toilets, sinks, showers, and washing machines. It is a mixture of various substances that can be harmful to the environment if not treated properly.

**Step 2: Identifying the Constituents of Domestic Sewage**
Domestic sewage consists of four main types of impurities:

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