Figure 5. Effect of mixing ratio of CH (cowpea hull) to waste activated sludge (WAS) on cumulative biogas production

From

Feasibility of Biogas Production from Cowpea Hull Anaerobic Digestion: Effect of Co-digestion with Waste-activated Sludge and Rice Straw

Christian Toochukwu Ogbonna, Ondiba Hesborn Andole, Zhenya Zhang

Sustainable Energy. 2022, 10(1), 21-28 doi:10.12691/rse-10-1-2