Fig. 2
Cumulative biogas, hydrogen, methane, and carbon dioxide yields of the acidogenic duckweed reactors over 21Â days. Reactors were operated under: a acidic mesophilic; b acidic thermophilic; c basic mesophilic; d basic thermophilic conditions. Blank (no inoculum) reactors are represented as empty bullets whereas active (with inoculum) reactors are represented as solid bullets