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Phosphorus transformation behavior and phosphorus cycling genes expression in food waste composting with hydroxyapatite enhanced by phosphate-solubilizing bacteria

文献类型：外文期刊

第一作者： Xu, Shaoqi

作者： Xu, Shaoqi;Jia, Kaixue;Zheng, Yi;Chen, Wenjie;Sun, Baoru;Li, Ji;Wei, Yuquan;Zheng, Yi;Chen, Wenjie;Fan, Beibei;Li, Ji;Wei, Yuquan;Wang, Zhigang;Wei, Dan;Cheng, Meidi

作者机构：

关键词： Hydroxyapatite; P transformation; Bacillus; 31P NMR; P cycle genes

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： 2023 年 376 卷

页码：

收录情况： SCI

摘要： This study aimed to explore the effect of phosphate-solubilizing bacteria (PSB) Bacillus inoculation in the cooling stage on hydroxyapatite dissolution, phosphorus (P) forms transformation, and bacterial P cycling genes in food waste composting with hydroxyapatite. Results indicated that PSB inoculation promoted the dissolution of hy-droxyapatite, increased P availability of compost by 8.1% and decreased the ratio of organic P to inorganic P by 10.2% based on sequential fractionation and 31P nuclear magnetic resonance spectroscopy. Illumina sequencing indicated Bacillus relative abundance after inoculation increased up to one time higher than control after the cooling stage. Network analysis and metabolic function of bacterial community analysis suggested inorganic P solubilizing genes of Bacillus and organic P mineralization genes of other genera were improved after inoculation in the core module. Therefore, bioaugmentation of PSB in the cooling stage may be a potential way to improve P bioavailability of bone and food waste in composting.

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