Biogas production can reduce the pollution potential in wastewater by reducing the oxygen levels required by the organic matter. Nutrients like nitrogen and phosphorous are conserved in the digestate, which is the material remaining after the anaerobic digestion.

This installation is technically simple, capable of receiving biogas from municipal wastewater sewage.


Source: https://www.veolia.com/anz/our-services/our-services/energy-services/waste-energy/biogas/biogas-wastewater-treatment-plants