Wheat straw biochar as an additive in swine manure Composting: An in-depth analysis of mixed material particle characteristics and interface interactions

文献类型： 外文期刊

第一作者： He, Xueqin

作者： He, Xueqin;Peng, Zhihao;Chen, Yufeng;Huang, Yuanping;Xiong, Jingpeng;Fang, Chen;Huang, Guangqun;Han, Lujia;Zhu, Yuxiong;Du, Shurong;Wang, Long;Zhou, Ling;He, Xueqin

作者机构：

关键词： Biochar; Microscale characterization; Particle-size distribution; FTIRM; Composting

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： 2024 年 176 卷

页码：

收录情况： SCI

摘要： In recent research, biochar has been proven to reduce the greenhouse gases and promote organic matter during the composting. However, gas degradation may be related to the microstructure of compost. To investigate the mechanism of biochar additive, composting was performed using swine manure, wheat straw and biochar and representative solid compost samples were analyzed to characterize the mixed biochar and compost particles. We focused on the microscale, such as the particle size distributions, surface morphologies, aerobic layer thicknesses and the functional groups. The biochar and compost particle agglomerations gradually became weaker and the predominant particle size in the experiment group was < 200 mu m. The aerobic layer thickness (Lp) was determined by infrared spectroscopy using the wavenumbers 2856 and 1568 cm-1, which was 0-50 mu m increased as composting proceeded in both groups. The biochar increased Lp and facilitated oxygen penetrating the compost particle cores. Besides, in the biochar-swine manure particle interface, the aliphatic compound in the organic components degraded and the content of aromaticity increased with the composting process, which was indicated by the absorption intensity at 2856 cm-1 decreasing trend and the absorption intensity at 1568 cm-1 increasing trend. In summary, biochar performed well in the microscale of compost pile.

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