Solid-Liquid Separation and Its Environmental Impact on Manure Treatment in Scaled Pig Farms-Evidence Based on Life Cycle Assessment

文献类型： 外文期刊

第一作者： Zhang, Yijia

作者： Zhang, Yijia;Ma, Xintian;Du, Yating;Du, Xinyi;Yang, Yadong;Bo, Qinqing;Xu, Liyang

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关键词： manure treatment; life cycle assessment; solid-liquid separation; anaerobic digestion

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.6； 五年影响因子：3.6 ）

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年卷期： 2023 年 13 卷 12 期

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收录情况： SCI

摘要： Recently, there has been a significant focus on the issue of pollution caused by livestock and poultry rearing, which is recognized as a prominent contributor to nonpoint source pollution in the agricultural sector. This study employed the life cycle assessment (LCA) methodology to evaluate the environmental impact of several pig manure processing scenarios with the aim of determining the appropriate solid-liquid separation tool for large-scale pig farms. The findings indicate that the utilization of a screw extruder for solid-liquid separation in Scenario 2 has a lower environmental impact. In contrast to Scenario 1, Scenario 2 exhibits reduced environmental potential in the areas of global warming, human toxicity, acidification, and eutrophication. Specifically, the global warming, human toxicity, acidification, and eutrophication impacts decreased by 56%, 81%, 83%, and 273%, respectively, due to the implementation of solid-liquid separation. The type of solid-liquid separation equipment used during the processing of swine manure, as well as the subsequent treatment, have a significant impact on environmental emissions. Compared to Scenario 2, Scenario 3, which utilizes a centrifugal microfilter for solid-liquid separation, exhibits a lower environmental impact in terms of human toxicity, resulting in a reduction of 0.736 kg DCB-eq. In general, solid-liquid separation is a viable and environmentally friendly method for the disposal of waste from large-scale pig farms. The adoption of this method is highly recommended. During its implementation, careful consideration should be given to factors such as separation efficiency and pollution emissions. It is crucial to select appropriate equipment for solid-liquid separation to effectively process the waste.

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