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| A Case Study on Life Cycle Assessment of Pig Manure Compost Production in a Pig Farm |
| Received:May 25, 2014 |
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| KeyWord:composting;life cycle assessment;environmental impact;pig manure;intensive pig farming |
| Author Name | Affiliation | E-mail | | LUO Yi-ming | Beijing Monitoring Station of Animal Husbandry Environment, Beijing 102200, China
College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | | | ZHANG Li-li | Beijing Monitoring Station of Animal Husbandry Environment, Beijing 102200, China | | | LI Guo-xue | College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | ligx@cau.edu.cn | | WU Di-mei | Beijing Monitoring Station of Animal Husbandry Environment, Beijing 102200, China | | | YUAN Jing | College of Resource and Environmental Science, China Agricultural University, Beijing 100193, China | | | ZHANG Zhuo-yi | Beijing Monitoring Station of Animal Husbandry Environment, Beijing 102200, China | | | LIU Jia | Beijing Monitoring Station of Animal Husbandry Environment, Beijing 102200, China | |
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| Abstract: |
| We evaluated the environmental burdens of one existing composting system and four alternative composting systems with different turning frequencies in Beijing area using life cycle assessment(LCA). The results showed that resources consumption and atmospheric emissions played important roles in the environmental impacts of pig manure composting process. For these five composting options, fossil energy of 80.8 to 221.5 MJ was needed to compost one ton of pig manure. During composting, ammonia emissions contributed more than 96% to the acidification potential(AP) and eutrophication potential(EP). Carbon dioxide and N2O from the pig farms contributed to about 58% to 88% and 8% to 35% of the total global warming potential, respectively. Of the alternative options, the options with turning frequency of 1 to 2 times per week with diesel-powered turning machine should be recommended for pig manure composting because of the lower environmental impacts. |
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