Phosphate additives promote humic acid carbon and nitrogen skeleton formation by regulating precursors and composting bacterial communities

文献类型： 外文期刊

第一作者： Su, Jing

作者： Su, Jing;Zhan, Yabin;Chang, Yuan;Chang, Su;Luo, Yan;Xu, Ting;Qiao, Yuhui;Li, Ji;Wei, Yuquan;Su, Jing;Zhan, Yabin;Chang, Yuan;Xu, Ting;Qiao, Yuhui;Li, Ji;Wei, Yuquan;Zhan, Yabin;Chen, Yunfeng;Yang, Li;Chen, Peizhen

作者机构：

关键词： Food waste; Humification; Superphosphate; Struvite; Nitrogen retention; Ammonium

期刊名称：BIORESOURCE TECHNOLOGY （ 影响因子：11.4； 五年影响因子：10.6 ）

ISSN： 0960-8524

年卷期： 2024 年 399 卷

页码：

收录情况： SCI

摘要： This study aimed to compare the effect of different phosphate additives including superphosphate (CP) and MP [Mg(OH) 2 + H 3 PO 4 ] on nitrogen conversion, humus fractions formation and bacterial community in food waste compost. The results showed the ratio of humic acid nitrogen in total nitrogen (HA-N/TN) in CP increased by 49 %. Ammonium nitrogen accumulation was increased by 75 % (CP) and 44 % (MP). Spectroscopic techniques proved that phosphate addition facilitated the formation of complex structures in HA. CP enhanced the dominance of Saccharomonospora , while Thermobifida and Bacillus were improved in MP. Structural equation modeling and network analysis demonstrated that ammonium nitrogen can be converted to HA -N and has positive effects on bacterial composition, reducing sugars and amino acids, especially in CP with more clustered network and synergic bacterial interactions. Therefore, the addition of phosphate provides a new idea to regulate the retained nitrogen toward humification in composting.

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