The greenhouse gas emission potential and phytotoxicity of biogas slurry in static storage under different temperatures

文献类型： 外文期刊

第一作者： Meng, Xingyao

作者： Meng, Xingyao;Zhu, Mingcheng;Wang, Qingping;Ren, Lianhai;Meng, Xingyao;Ren, Lianhai;Cai, Yafan;Liu, Wei

作者机构：

关键词： Biogas slurry; Temperature; Static storage; Nitrogen conversion; Greenhouse gas emission; Phytotoxicity

期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：5.8； 五年影响因子：5.4 ）

ISSN： 0944-1344

年卷期： 2023 年 30 卷 16 期

页码：

收录情况： SCI

摘要： With the booming development of biogas industry to treat organic waste in China, the by-product of biogas slurry was accompanied with a huge amount. Static storage process of biogas slurry was normally operated under different seasons before application to land which would cause nutrition decomposition and greenhouse gas emission. Thus, the aim of this study was to investigate the nutrition decomposition, greenhouse gas emission (CH4 and N2O), and phytotoxicity of biogas slurry under different static temperatures, furthermore to illuminate the network among them and functional microorganism. According to the results, higher temperature at 30 degrees C contributed to fast and complete degradation of COD. In addition, more quantity of NH4+ conversion and NO3- formation appeared at 30 degrees C. These factors resulted in relatively less crop toxicity together. CH4 was the dominant greenhouse gas emission than N2O and was highest in 30 degrees C treatment with total emission of 273.7 L/(m(3)center dot d) and greenhouse gas emission of 20.01 kg CO(2)e (carbon dioxide equivalent). Lower temperature was conductive to N reservation and reduction of greenhouse gas emission, but making against with stabilization of organic matter and crop safety. At the same dilution times (<= 3) of biogas slurry with deionized water, higher temperature at 30 degrees C could reduce 30 days of storage time, but 10 degrees C was still unsafe for crop. Structural equation model was further illustrated the positive effect of temperature on NO3-, CH4, GI, and N2O and negative on COD and NH4+. These results could help to monitor the environmental risk, evaluate the maturity, guide the irrigation scheme, and regulate the static storage condition of biogas slurry under different seasons.

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