What is sewage mostly made of?

Answer 1

Liquid waste, with dissolved solids and undissolved solids.

Sewage is transported to the treatment plant by underground pipeline(sewers).

At the sewerage plant, the undissolved solids are first filtered out. So the whole is now a liquid solution.

This solution is then treated with various chemical ions to remove the dissolved solids.

Then it is filtered through filter beds to 'clean' the water.

Finally, chlorine gas is bubbled through as a bacteriocide, so that the water can be used for drinking.

Then as clean fresh pure water , it is pumped back to consumers/houses etc., for consumption.

The solid materials collected at the sewerage plant are treated with enzymes and more bacteria, to make it into a suitable fertiliser, for agricultural use.

Answer 2

Sewage is mostly composed of human waste, including urine and feces, as well as water from toilets, sinks, and showers. It can also include other household waste, such as food scraps, soap, and cleaning products, as well as industrial waste and other pollutants that may have entered the sewage system.

Answer 3

Human Waste