Wasteage of treatment wastewater:

Like precipitation, treated wastewater can be used for low-grade purposes in buildings.The treated water can be retained in reservoirs or ponds. As the inflow of treated water is relatively constant (as is the inflow of wastewater), less buffering volume need be created in the reservoir.

In the Netherlands, all buildings are required by law to be connected to the sewer system. Reusing water treated in decentralised facilities requires dispensation from the mandatory mains connection.

What is Biogas?

Animal manure, food scraps, wastewater, and sewage are all examples of organic matter that can produce biogas.