Effect of temperature and storage methods on liquid digestate: Focusing on the stability, phytotoxicity, and microbial community

文献类型： 外文期刊

第一作者： Yan, Jing

作者： Yan, Jing;Chen, Xiaotian;Wang, Ziyu;Zhang, ChaoJun;Zhu, Wanbin;Cui, Zongjun;Yuan, Xufeng;Yan, Jing;Meng, Xingyao;Zhao, Xiaoling;Ma, Xuguang

作者机构：

关键词： Liquid digestate; Stability; Phytotoxicity; Microbial community evolution; Structural equation model

期刊名称：WASTE MANAGEMENT （ 影响因子：8.1； 五年影响因子：8.7 ）

ISSN： 0956-053X

年卷期： 2023 年 159 卷

页码：

收录情况： SCI

摘要： Identifying the stability and phytotoxicity of liquid digestate (LD) is necessary for safe agricultural utilization. Storage temperature, method, and time are critical factors that affect the stability and phytotoxicity of LD. This study therefore aimed to explore the dynamics of stability, phytotoxicity, and microbial community of LD in cattle farms under different storage conditions. The results showed that the contents of solids, organic matter, nitrogen, and phosphorous decreased during storage and exhibited temperature dependency. Conversely, the seed germination index increased, which was negatively correlated with dissolved organic carbon and ammo-nium nitrogen and positively correlated with certain bacteria (Thermovirga and Fastidiosipila). Open storage and/ or higher temperature were found to contribute to the stabilization efficiency and phytotoxicity disappearance of LD. Open storage of LD at 30 degrees C for 60 days and 20 degrees C for 90 days was safe for its agricultural utilization, while hermetic storage of LD at 30 degrees C for 120 days and 20 degrees C for 150 days was safe. However, for storage at 10 degrees C for 180 days, additional post-treatment is required.

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