Fig. 8From: Exploring the potential role of decentralised biogas plants in meeting energy needs in sub-Saharan African countries: a techno-economic systems analysisCO2 emission saved using the digested slurry produced in the brick reactor, where A is only cow dung, B is the co-digestion of CD/HF, C is the co-digestion of CD/grass, and D is the co-digestion of CD/maizeBack to article page