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

文献类型： 外文期刊

第一作者： Meng, Xingyao

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

作者机构：

关键词： Micro -aeration; Compost; Maturity; Biogas residues; Full-scale

期刊名称：WASTE MANAGEMENT （ 影响因子：8.1； 五年影响因子：8.7 ）

ISSN： 0956-053X

年卷期： 2023 年 168 卷

页码：

收录情况： SCI

摘要： 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 celcius 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.

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