Influence of titanate photocatalyst in biohydrogen yield via photo fermentation from corn stover

• Published in: Bioresource technology 2023-10, Vol.386, p.129544-129544, Article 129544
• Main Authors: Yang, Xudong, Li, Yameng, Zhang, Ningyuan, Zhang, Huan, Liu, Hong, Xiang, Guanning, Zhang, Quanguo
• Format: Article
• Language: English
• Subjects: Biohydrogen production; Corn stover; Photo fermentation; Titanate photocatalysts
• ISSN: 0960-8524; 1873-2976
• DOI: 10.1016/j.biortech.2023.129544

[Display omitted] •The titanate was combined with photo fermentative hydrogen production (PFHP).•Adding titanate significantly improved the efficiency of PFHP.•Adding titanate can shorten the hydrogen production delay period.•The addition of titanate can promote the utilization of Volatile fatty acids.•The cumulative hydrogen production by adding MgTiO3 increased by 48.3%. The effects of three common titanate photocatalysts (TPC) on the photo fermentation biohydrogen production (PFHP) from corn stover were studied in this paper. Compared with CaTiO3 and BaTiO3, the experimental group with the addition of MgTiO3 showed stronger potential for PFHP, the maximum hydrogen yield of 344 mL (68.8 mL/g TS) was obtained at 3 g/L MgTiO3, increased by 48.3%. For CaTiO3, BaTiO3, the optimal amount of addition was 8 and 7 g/L, respectively, in which, the hydrogen yield was 308 and 288 mL (61.6 and 57.6 mL/g TS). TPC addition could shorten the delay period of hydrogen production lower the Oxidation-Reduction Potential (ORP) of fermentation broth, especially MgTiO3 addition, the delayed hydrogen production could be shortened by 33.2% compared with control group, and the ORP could reach the lowest value of −371 mV.