|Sludge treament |
Aerobic stabilisation can be performed simultaneously in an activated sludge plant whereby primary and secondary sludges are continuously aerated for long periods of time. In aerobic digestion the microorganisms extend into a respiration phase where materials previously stored by the cell are oxidized, resulting in a reduction of the biologically degradable organic matter. Thus, aerobic stabilisation of the entire excess sludge (including primary sludge) is energy consuming. Additionally, it calls for extra reactor volume.
Digesters (source: klaerwerk-online.de)
More information about sludge treatment and reduction are on the following pages: