For WABAG, sludge treatment is an integral part of efficient wastewater treatment. In addition, the anaerobic stabilization of sewage sludge can secure an ecologically and economically advantageous supply of energy through the use of biogas.

Large wastewater treatment plants are thus able to cover up to 100 per cent of their power requirements. By innovation in sludge management, WABAG also helps cities across the globe cope with the issue of sludge management due to land scarcity.