Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, and the Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, China.
Hebei Key Laboratory of Heavy Metal Deep-Remediation in Water and Resource Reuse, and the Laboratory of Applied Chemistry, Yanshan University, Qinhuangdao 066004, China.
Bioresour Technol. 2022 Aug;358:127380. doi: 10.1016/j.biortech.2022.127380. Epub 2022 May 26.
The polyphenol humification pathway is essential for soil-forming and compost maturing processes. This study explored the effects of adding different proportions of polyphenol-rich wine grape pomace (WGP) on humification performance and microbial dynamics during pig manure (PM) composting. The results demonstrated that WGP effectively prolonged the duration of the thermophilic period, and improved humification production and compost maturity by enhancing beneficial interactions among microorganisms. Moreover, adding 40% WGP was optimal for nitrogen conservation, and the corresponding germination index (GI) reached 95%. Excitation-emission matrix (EEM) fluorescence spectroscopy analysis suggested that optimizing the WGP content was conducive to the conversion of protein-like substances, which improved the humification of organic matter. In addition, structural equation modelling (SEM) demonstrated that polyphenol content and temperature were the key parameters affecting the humification products. The results showed that WGP holds great promise to improve composting progress and fertilizer quality for biowaste utilization.
多酚腐殖化途径对于土壤形成和堆肥成熟过程至关重要。本研究探讨了添加不同比例富含多酚的葡萄酒葡萄渣（WGP）对猪粪（PM）堆肥过程中腐殖化性能和微生物动态的影响。结果表明，WGP 通过增强微生物之间的有益相互作用，有效地延长了高温期的持续时间，并提高了腐殖化产物和堆肥成熟度。此外，添加 40%的 WGP 有利于氮素的保存，相应的发芽指数（GI）达到 95%。激发-发射矩阵（EEM）荧光光谱分析表明，优化 WGP 含量有利于蛋白质类物质的转化，从而提高了有机质的腐殖化程度。此外，结构方程模型（SEM）表明，多酚含量和温度是影响腐殖化产物的关键参数。结果表明，WGP 有望改善生物废物利用过程中的堆肥进度和肥料质量。
