Hungry bacteria extract energy from sewage
In domestic sewage, there are various organic substances, mainly from toilets and kitchens, containing lots of energy. Dr. Francis Meerburg of CMET developed a fast variation of the contact-stabilization process, in which he starves the bacteria periodically as a 'fasting regimen'. Afterwards, wastewater is briefly brought into contact with the bacteria, so the hungry creatures gobble the organic matter without digesting. This allows to reap the undigested materials for energy recovery (biogas) and high quality materials.