Effect of auxiliary materials on the formation of humic acid carbon and nitrogen and bacterial dynamics in kitchen waste composting
文献类型： 外文期刊
作者： Zhan, Yabin 1 ; Chang, Su 2 ; Chen, Yanting 2 ; Chang, Yuan 2 ; Chen, Peizhen 4 ; Chen, Yunfeng 1 ; Zhang, Longli 5 ; Yang, Li 1 ; Xia, Xiange 1 ; Li, Ji 2 ; Wei, Yuquan 2 ;
作者机构： 1.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Minist Agr & Rural Affairs, Key Lab Fertilizat Agr Wastes, Wuhan 430064, Hubei, Peoples R China
2.China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Biodivers & Organ Farming, Beijing 100193, Peoples R China
3.China Agr Univ, Organ Recycling Inst Suzhou, Suzhou 215128, Peoples R China
4.Minist Agr & Rural Affairs, Agroenvironm Protect Inst, Tianjin 300191, Peoples R China
5.Beijing Voto Sky & Land Biotechnol Ltd Co, Beijing 100193, Peoples R China
关键词： Composting; Bulking agent; Humification process; Lignocellulose fractions; Microbial community
期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 2023影响因子：7.4； 五年影响因子：7.3 ）
ISSN： 2213-2929
年卷期： 2024 年 12 卷 4 期
收录情况： SCI
摘要： This study investigated the impacts of different types of auxiliary materials on the humification process and bacterial dynamics during kitchen waste composting. Five types of auxiliary materials, including sawdust (SD), garden waste (GW), aquatic plants (AP), rice straw (RS), and rice husk (RH), were compared. The relationship between humic acid carbon and nitrogen components as well as bacterial community was analyzed by structural equation model and redundancy analysis. The results dindicated that SD and RS exhibited better thermophilic stage duration, germination index, and organic fractions degradation than other groups, which had higher degree of polymerization and the humification index of kitchen waste composting. AP, SD and RS had higher total nitrogen (TN) content and ammonia nitrogen accumulation, and RS had more humic acid nitrogen in TN with more amino acids and polyphenols precursors compared to other groups. High-throughput sequencing indicated that sawdust affected the variation of community structure and bacterial genera associated with lignocellulose degradation more than others. Redundancy analysis showed that Pseudoxanthomonas helped to the NH4+-N conversion to humic acid nitrogen for TN preservation. Structural equation modelling suggested that the conversion and utilization efficiency of microbes directly influenced the accumulation of humic acid carbon and nitrogen based on the types of intermediate metabolites. This study highlighted the role of auxiliary materials on improving the humification process of rapid kitchen waste composting.
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