Experimental Study on Anaerobic Digestion of Rice Straw for Biogas and Organic Fertilizer Co-production

Ben-lin DAI, An-feng ZHU, Ning XU, Ji-ming XU


The effect of fermentation conditions on biogas production and constituents of fermentation residue was discussed during the anaerobic digestion of rice straw waste. A self-designed laboratory-scale continuous anaerobic biogas digester was used in this study. The results showed that the peak value of biogas production was attained on the 16th day in C group substrates. However, the highest CH4 content was 60.8% on the 24th day in B group substrates. The cumulative biogas production of C group substrates was the highest, about 18 720 mL, which was followed by D (15 057 mL), B (12 103 mL), and A group substrates (10 754 mL).


Anaerobic digestion, Biogas, Organic fertilizer, Rice straw



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