A pilot study of biohythane production from cornstalk via two-stage anaerobic fermentation. (13th November 2020)

• Record Type: Journal Article
• Authors: Li, Jiaming; He, Jianwei; Si, Buchun; Liu, Zhidan; Zhang, Chong; Wang, Yuxin; Xing, Xin-hui
• Is Part Of: International journal of hydrogen energy. Volume 45:Number 56(2020)
• Page Start: 31719
• Page End: 31731
• Publication Date: 2020-11-13
• Subjects: Two-stage anaerobic fermentation -- Biohythane -- Biohydrogen -- Cornstalk -- Pilot study -- Biorefinery; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2020.08.253
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: This study aimed to study the feasibility and stability of biohythane production from cornstalk via two-stage anaerobic fermentation without hydrolysis step in a semi-continuous pilot scale system. The present study applied a 1 m 3 continuous stirred tank reactor for biohydrogen production and a 0.5 m 3 up-flow anaerobic sludge bed for biomethane production. During the entire operation, a hydrogen production yield of 25.02 L/kg TS and hydrogen production rate of 0.46 L/L/d was achieved in first-stage. In addition, a methane yield of 95.38 L/kg TS and methane production rate of 4.06 L/L/d was achieved in second-stage by using the liquid effluent after first-stage. The percentage of hydrogen in the biohythane gas was 18.47% which suitable for vehicle fuel. Moreover, it was feasible to use the solid residue as a growth medium in seedlings to improve energy and carbon recovery. The results suggest that biohythane production from cornstalk could be a promising biofuel avenue. Highlights: Pilot two-stage anaerobic fermentation system to produce biohythane from cornstalk. The system consisted of 1 m 3 bioH2 CSTR and 0.5 m 3 bioCH4 UASB reactors. Hydrogen and methane production rates reached 0.46 and 4.06 L/L/d, respectively. Fermentation residue was developed as growth medium in vegetable seedlings. Co-production of biohythane and seedling substrate from cornstalk were achieved.