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<p>To evaluate the environmental impacts of typical manure management methods in China and provide support for manure management optimization, this study conducted a life cycle assessment of four manure management systems (membrane-covered aerobic fermentation (MCF), static aerobic fermentation (SF), hot air drying (HAD), and a bedding recovery unit (BRU)) at a dairy farm in Beijing (&gt; 1000 cows). Calculating the values for seven impact categories (global warming potential, water use, acidification potential, eutrophication potential, primary energy demand, human health damage, and photochemical ozone creation potential) and the comprehensive environmental impacts were compared. Results displayed the comprehensive environmental impacts increased in the order SF &lt; MCF &lt; BRU &lt; HAD. The MCF system exhibited the lowest global warming potential due to reduced greenhouse gas emissions, which were 13.18%, 46.34%, and 33.23% lower than those of the SF, HAD, and BRU systems, respectively. However, the values for other impact categories were slightly higher for the MCF system compared to the static aerobic fermentation system. Therefore, if the energy consumption of the MCF system could be decreased, the system would offer more comprehensive advantages over the other systems for treating manure produced on dairy farms, decreasing dairy industry carbon emissions and improving the sustainability of the dairy industry.</p> Graphical Abstract <p></p>

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Comparison on Environmental Impacts of Dairy Manure Management Methods in China: A Life Cycle Assessment

  • 期刊论文

  • 发表日期：

    2025年3月7日

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  • Ya Su,
  • Yuying Liang,
  • Qianting Zhuo,
  • Hongjie Yin,
  • Chen Fang,
  • Lujia Han,
  • Guangqun Huang

摘要

To evaluate the environmental impacts of typical manure management methods in China and provide support for manure management optimization, this study conducted a life cycle assessment of four manure management systems (membrane-covered aerobic fermentation (MCF), static aerobic fermentation (SF), hot air drying (HAD), and a bedding recovery unit (BRU)) at a dairy farm in Beijing (> 1000 cows). Calculating the values for seven impact categories (global warming potential, water use, acidification potential, eutrophication potential, primary energy demand, human health damage, and photochemical ozone creation potential) and the comprehensive environmental impacts were compared. Results displayed the comprehensive environmental impacts increased in the order SF < MCF < BRU < HAD. The MCF system exhibited the lowest global warming potential due to reduced greenhouse gas emissions, which were 13.18%, 46.34%, and 33.23% lower than those of the SF, HAD, and BRU systems, respectively. However, the values for other impact categories were slightly higher for the MCF system compared to the static aerobic fermentation system. Therefore, if the energy consumption of the MCF system could be decreased, the system would offer more comprehensive advantages over the other systems for treating manure produced on dairy farms, decreasing dairy industry carbon emissions and improving the sustainability of the dairy industry.

Graphical Abstract