Effect of aeration/micro-aeration on lignocellulosic decomposition, maturity and seedling phytotoxicity during full-scale biogas residues composting

Xingyao Meng; Qingping Wang; Xixi Zhao; Yafan Cai; Jingyi Fu; Mingcheng Zhu; Xuguang Ma; Pan Wang; Rufei Liu; Yongjing Wang; Wei Liu; Lianhai Ren

doi:10.1016/j.wasman.2023.06.007

Effect of aeration/micro-aeration on lignocellulosic decomposition, maturity and seedling phytotoxicity during full-scale biogas residues composting

Waste Manag. 2023 Aug 1:168:246-255. doi: 10.1016/j.wasman.2023.06.007. Epub 2023 Jun 14.

Authors

Xingyao Meng¹, Qingping Wang¹, Xixi Zhao², Yafan Cai³, Jingyi Fu¹, Mingcheng Zhu¹, Xuguang Ma⁴, Pan Wang¹, Rufei Liu⁵, Yongjing Wang⁶, Wei Liu⁷, Lianhai Ren⁸

Affiliations

¹ Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China; School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China.
² China IPPR International Engineering Co., Ltd, Logistics and Industrial Engineering Research Institute, Beijing 100083, China.
³ School of Chemical Engineering, Zhengzhou University, Zhengzhou, 450001, China.
⁴ School of New Energy Materials and Chemistry, Leshan Normal University, Leshan 614000, China.
⁵ Cucde Environmental Technology Co., Ltd, Beijing 100120, China.
⁶ Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China; School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China. Electronic address: wangyongjing@btbu.edu.cn.
⁷ Key Laboratory of Fertilization from Agricultural Wastes, Ministry of Agriculture and Rural Affairs /Institute of Plant Protection and Soil Fertilizer, Hubei Academy of Agricultural Science, Wuhan, 430064, China.
⁸ Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry, Beijing Technology and Business University, Beijing 100048, China; School of Ecology and Environment, Beijing Technology and Business University, Beijing 100048, China. Electronic address: renlh@th.btbu.edu.cn.

PMID: 37327518
DOI: 10.1016/j.wasman.2023.06.007

Abstract

With the accelerated construction of biogas plants, the amount of biogas residues are expanding. Composting has been widely implemented to deal with biogas residues. Aeration regulation is the main factor affecting the post-composting treatment of biogas residues as high-quality fertilizer or soil amendment. Therefore, this study aimed to investigate the impact of different aeration regulations on full-scale biogas residues compost maturity by controlling oxygen concentration under micro-aeration and aeration conditions. Results showed that micro-aerobic extended the thermophilic stage of 17 days at above 55 ℃ and facilitated the mineralization process of organic nitrogen into nitrate nitrogen to retain higher N nutrition levels compared to aerobic treatment. For biogas residues with high moisture, aeration should be regulated at different full-scale composting stages. Total organic carbon (TOC), NH₄⁺-N, NO₃^--N, total potassium (TK), total phosphorus (TP) and the germination index (GI) could be used to evaluate stabilization, fertilizer efficiency and phytotoxicity of compost with frequent monitoring times. However, seedling growth trials were still necessary in full-scale composting plants when changing of composting process or biogas residues feedstock.

Keywords: Biogas residues; Compost; Full-scale; Maturity; Micro-aeration.

MeSH terms

Biofuels
Composting*
Fertilizers
Nitrogen / analysis
Seedlings / chemistry
Soil / chemistry

Substances

Biofuels
Fertilizers
lignocellulose
Soil
Nitrogen