Influence of Biochar on Physico-Chemical, Microbial Community and Maturity during Biogas Residue Aerobic Composting Process
Youpei Qu,
Jingbo Qu,
Wencong Yan,
Tian Yue,
Quanguo Zhang,
Weiming Yi,
Xiaofeng Liu,
Yong Sun
Affiliations
Youpei Qu
College of Engineering, Northeast Agricultural University, Harbin 150030, China
Jingbo Qu
College of Engineering, Northeast Agricultural University, Harbin 150030, China
Wencong Yan
College of Engineering, Northeast Agricultural University, Harbin 150030, China
Tian Yue
College of Engineering, Northeast Agricultural University, Harbin 150030, China
Quanguo Zhang
Key Laboratory of New Materials and Facilities for Rural Renewable Energy of Ministry of Agriculture and Rural Affairs, Henan Agricultural University, Zhengzhou 450002, China
Weiming Yi
College of Agricultural Engineering and Food Science, Shandong University of Technology, Zibo 255000, China
Xiaofeng Liu
Key Laboratory of Environmental and Applied Microbiology, Environmental Microbiology Key Laboratory of Sichuan Province, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
Yong Sun
College of Engineering, Northeast Agricultural University, Harbin 150030, China
With the rapid development of large and medium-sized biogas projects, the high-value utilization of anaerobic fermentation residues has become a hot spot in recent years. In this study, biogas residue from biogas engineering was used as composting raw material, and 0 (CK), 2.5% (T1), 5.0% (T2), 7.5% (T3), and 10.0% (T4) biochar was added to investigate its effects on physico-chemical properties, microbial populations, and maturity degree during the aerobic composting process. Results show that the addition of biochar shortens the time (3 days) to reach the high-temperature period, increases the composting temperature (63.8 °C) and germination index (GI), decreases the electrical conductivity (EC), reduces the loss of C and N elements, and increases the microbial population during composting. These results suggest that biochar can improve the maturity and fertility of compost products, and significantly regulate the structure and function of microbial communities during the composting process.
