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- Title
Research on the electrochemistry synergied cellulase enzymes strengthens the anaerobic fermentation of cow dung.
- Authors
Cai, Yingying; Li, Heng; Qu, Guangfei; Li, Junyan; Ren, Nanqi; Zou, Hongmei; Hu, Yinghui; Zeng, Jinhua
- Abstract
Lignocellulose degradation (LCD) was the key factor limiting the development of anaerobic fermentation (AF) by the cow dung (CD). In the research, the effects of cellulase pretreatment (CP) and microvoltage (MV) alone and combination on the gas production and LCD during the AF were investigated. The results showed that both CP and MV had an significant effect on the AF, though the synergistic reaction was more pronounced. The total biogas yield (TBY) could reach 11521 mL, and the highest methane production rate was 73% in the synergistic reactions, which was increased by 18.7% and 10.0% compared to CP and MV alone respectively. Meanwhile, the degradation rates of cellulose and lignin could be increased by 33.44% and 22.23%, respectively. The results of SEM, FT-IR and excitation emission matrix demonstrated that CP and MV played an important role in improving the fermentation efficiency. The microbial biomass change results indicated that the synergistic effect of CP and 0.8 V MV on the LCD was achieved by promoting the growth of lignocellulose-degrading bacteria. Moreover, the electricity could not only accelerate the movement of microorganisms and enzymes, but also promoted and enhanced the activity of enzymes, which provided an important reference for further development of the AF technology and the biogas industry.
- Subjects
MICROBIAL enzymes; MANURES; FERMENTATION; ENZYMES; BIOGAS industry; CELLULASE; LIGNOCELLULOSE; LIGNIN structure
- Publication
Environmental Science & Pollution Research, 2022, Vol 29, Issue 36, p55174
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-022-19802-x