Enhanced anaerobic digestion of corn stover using magnetized cellulase combined with Ni-graphite coating. (1st January 2023)

• Record Type: Journal Article
• Authors: Sha, Hao; Zhao, Bo; Yang, Yuyi; Zhang, Yanhui; Zheng, Pengfei; Cao, Shengxian; Wang, Qing; Wang, Gong
• Is Part Of: Energy. Volume 262:Part B(2023)
• Publication Date: 2023-01-01
• Subjects: Anaerobic digestion -- Methane -- Corn stover -- Magnetized cellulase -- Ni-graphite coating material -- Microbial community; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2022.125532
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: The effects of combining magnetized cellulase (MC) with Ni-graphite (NG) coated materials on the anaerobic digestion of corn stover were investigated. In pretreatment of the corn stover, cellulase showed higher glycosylation efficiency in a 30 mT magnetic field environment than in other magnetic fields, and the reducing sugar content reached 0.182 mg/L. Treatment with the combination of magnetized cellulase and Ni-graphite coated material resulted in a 74.35% increase in cumulative CH4 yield. Analysis of the composition of the microbial community showed that the addition of Ni-graphite coating significantly influenced the composition of the microbial community. The electrically active microorganisms Bacteroidota (46.98%) and Methanomicrobiales (6.08%) became the dominant bacteria and archaea when the corn stover was treated with the NG+MC combination. Carbon balance calculations showed that the combination treatment resulted in carbon flow distributions that differed from other treatments, and the energy conversion efficiency (ECE) reached 57.1%. Graphical abstract: Image 1 Highlights: Cellulase hydrolysis activity enhanced by 30 mT magnetic field. Adding Ni-graphite coating material significantly increased CH4 yield. Electroactive microorganisms become the dominant bacterial community. Composite strengthening resulted in different carbon flow distributions. The energy conversion efficiency (ECE) reached 57.1%.