Bio-immobilization of dark fermentative bacteria for enhancing continuous hydrogen production from cornstalk hydrolysate. (November 2017)

• Record Type: Journal Article
• Authors: Zhao, Lei; Cao, Guang-Li; Sheng, Tao; Ren, Hong-Yu; Wang, Ai-Jie; Zhang, Jian; Zhong, Ying-Juan; Ren, Nan-Qi
• Is Part Of: Bioresource technology. Volume 243(2017)
• Page Start: 548
• Page End: 555
• Publication Date: 2017-11
• Subjects: Continuous H2 production -- Cornstalk hydrolysate -- Immobilization -- Biological carrier -- Mycelia pellets; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2017.06.161
• Languages: English
• ISSNs: 0960-8524

Abstract

Highlights: Mycelia pellets were employed to improve H2 production from cornstalk hydrolysate. Continuous process demonstrated the immobilization efficiency of mycelia pellets. Mycelia pellets immobilized CSTR gave a high energy conversion efficiency. This study provides an efficient way for H2 production from cornstalk hydrolysate. Abstract: Mycelia pellets were employed as biological carrier in a continuous stirred tank reactor to reduce biomass washout and enhance hydrogen production from cornstalk hydrolysate. Hydraulic retention time (HRT) and influent substrate concentration played critical roles on hydrogen production of the bioreactor. The maximum hydrogen production rate of 14.2 mmol H2 L −1 h −1 was obtained at optimized HRT of 6 h and influent concentration of 20 g/L, 2.6 times higher than the counterpart without mycelia pellets. With excellent immobilization ability, biomass accumulated in the reactor and reached 1.6 g/L under the optimum conditions. Upon further energy conversion analysis, continuous hydrogen production with mycelia pellets gave the maximum energy conversion efficiency of 17.8%. These results indicate mycelia pellet is an ideal biological carrier to improve biomass retention capacity of the reactor and enhance hydrogen recovery efficiency from lignocellulosic biomass, and meanwhile provides a new direction for economic and efficient hydrogen production process.