Sewage sludge and fat rich materials co-digestion - Performance and energy potential

As shown the energy balance, as the ratio of biogas-derived energy to energy consumed, after co-substrate introduction of the co-substrate improved by about 30%. Furthermore, implementation of the co-digestion process at the wastewater treatment plant may lead to an increased recovery degree of wastewater treatment plant energy consumption via electric energy supplied by methane combustion, even up to 100% in comparison to anaerobic digestion of sewage sludge alone.