Thermophilic Sludge Digestion System Brochure

The treatment of WWTP sludge represents a considerable cost for a sewage purification plant. In case the sludge amount is lowered the associated costs can be reduced. An efficient way for the reduction of the sludge amount is thermophilic sludge digestion. When compared with conventional mesophilic digestion thermophilic conditions take care of degradation of an much higher amount of the organic fraction (10-25% more conversion). The (additional) amount of biogas thus produced can be utilised (after S-removal using Bidox®) for the production of electricity and heat using a CHP (combined heat & power) installation. This has a direct positive impact on the energy balance of the sewage purification plant.