Scale-up of anaerobic digestion of the biowaste fraction from domestic wastes

In the City of Karlsruhe/Germany anaerobic digestion of 7200 t a−1 of separately collected biowaste has proven its feasibility at an organic loading rate (OLR) of up to 8.5 kg COD m−3 d−1. An extension of biowaste collection over the whole city area would increase the amount of biowaste to 12,000 t a−1, leading to an OLR of the existing anaerobic reactor of up to 15 kg COD m−3 d−1. To test, whether the increased amount of biowaste could be...