This Advisory leaflet prepared by the ATV-DVWK Specialist Committee AK-2 and its Working Group AK-2.1 deals with the biological stabilisation of sewage sludge and the effort to reduce stabilisation volume and time.
ATV-DVWK (2003): Biological Stabilisation of Sewage Sludge. Advisory Leaflet ATV-DVWK-M368E. Hennef: German Association for Water, Wastewater and Waste (DWA) URL [Accessed: 17.04.2015]