Enhanced polylactic acid plastic biodegradation during aerobic composting of cattle manure and wheat straw by nanobubble water

文献类型： 外文期刊

第一作者： Wang, Tianfeng

作者： Wang, Tianfeng;Zhang, Yuqian;Zhang, Yu;Peng, Cheng;Chen, Jianghe;Zhang, Yuxin;Xu, Ziying;Luo, Dan;Zhang, Jining

作者机构：

关键词： N 2 -nanobubble; CO 2 -nanobubble; Urease activity; Pseudomonadota; Hydrolysis

期刊名称：JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING （ 影响因子：7.2； 五年影响因子：7.6 ）

ISSN： 2213-2929

年卷期： 2025 年 13 卷 3 期

页码：

收录情况： SCI

摘要： Biodegradable plastics (BPs) degrade slowly in the natural environment, which is potentially threatening to human health and ecosystem security. Among these, polylactic acid plastics (PLA-Ps) are the most widely used BPs. This study investigated the promotion of PLA-Ps degradation during aerobic composting of cattle manure and wheat straw by the addition of N2 or CO2 nanobubble water (NBW). NBW increased the peak temperature by 1.0-1.8 degrees C, advanced the peak temperature by 3 days, and increased urease activity on day 10 and day 57 by 14.5 %-80.6 % and 37.6 %-158.1 %. The contents of total nitrogen and total phosphorus increased by 6.2 %- 8.6 % and 7.2 %-7.6 %, respectively, which enhanced the fertilizer efficiency of compost products. The & sdot;OH produced by NBW attacks the ester bonds in PLA-Ps and increases the relative abundance of Pseudomonadota, which promotes the hydrolysis of C & boxH;O, resulting in more pronounced erosion and cracking on plastic surfaces. The thermal stability of the PLA-Ps was improved, while their structural stability was compromised. Meanwhile, NBW decreased the number-average molecular weight of PLA-Ps, broadening the molecular weight distribution. These findings suggest that the addition of NBW to the composting process of cattle manure and wheat straw can enhance the degradation of PLA-Ps and improve the composting effect.

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