Effect of Biochar Addition on the Microbial Community and Methane Production in the Rapid Degradation Process of Corn Straw

Zhi Wang; Ying Guo; Weiwei Wang; Liumeng Chen; Yongming Sun; Tao Xing; Xiaoying Kong

LAPSE

Living Archive for Process Systems Engineering

LAPSE:2023.31696

Published Article

LAPSE:2023.31696

Effect of Biochar Addition on the Microbial Community and Methane Production in the Rapid Degradation Process of Corn Straw

Zhi Wang, Ying Guo, Weiwei Wang, Liumeng Chen, Yongming Sun, Tao Xing, Xiaoying Kong

April 19, 2023

Anaerobic digestion with corn straw faces the problems of difficult degradation, long fermentation time and acid accumulation in the high concentration of feedstocks. In order to speed up the process of methane production, corn straw treated with sodium hydroxide was used in thermophilic (50 °C) anaerobic digestion, and the effects of biochar addition on the performance of methane production and the microbial community were analyzed. The results showed that the cumulative methane production of all treatment groups reached over 75% of the theoretical methane yield in 7 days and the addition of 4% biochar increased the cumulative methane production by 6.75% compared to the control group. The addition of biochar also decreased the number of biogas and methane production peaks from 2 to 1, and had a positive effect on shortening the digestion start-up period and reducing the fluctuation of biogas production during the digestion process. The addition of 4% biochar increased the abundance of the bacterial family Peptococcaceae throughout the digestion period, promoting the hydrolysis rate of corn straw. The dominant archaeal genus Methanosarcina was significantly more abundant at the peak stage and the end of methane production with 4% biochar added compared to the control group.

Record ID

LAPSE:2023.31696

Keywords

anaerobic digestion, biochar, corn straw, methane, microbial community

Subject

Biosystems

Suggested Citation

Wang Z, Guo Y, Wang W, Chen L, Sun Y, Xing T, Kong X. Effect of Biochar Addition on the Microbial Community and Methane Production in the Rapid Degradation Process of Corn Straw. (2023). LAPSE:2023.31696

Author Affiliations

Wang Z: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guan
Guo Y: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guan
Wang W: Academy of Chemistry and Materials Engineering, University of Science and Technology of China, Hefei 230026, China
Chen L: Institute of Applied Agricultural Microorganism, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China
Sun Y: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guan
Xing T: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guan
Kong X: Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China; CAS Key Laboratory of Renewable Energy, Guangzhou 510640, China; Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guan

Journal Name

Energies

Volume

14

Issue

8

First Page

2223

Year

2021

Publication Date

2021-04-16