Full chain carbon footprint analysis of garbage disposal process before and after food waste in-situ reduction treatment in Shanghai pilot communities
ZHAN Yong1,, HUANG Jialiang1, LUO Wei2, DONG Bin3,,, XU Haibin4, HUANG Yangdong1 1.School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China 2.Beijing Jinghuan Intelligence Environmental Protection Technology Co. Ltd., Beijing 100101, China 3.School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China 4.Pangang Group Xichang Steel and Vanadium Co. Ltd., Xichang 615000, China
Abstract:In July 2019, Shanghai took the lead in implementing garbage classification. The classification and treatment of food waste is a serious problem in garbage sorting. At the garbage sorting station in community, solid-liquid separation for the food waste by the disposer is a pilot measure to achieve the food waste source reduction. In order to further compare the carbon emissions between two different modes, namely, traditional mixed garbage treatment mode and the food waste in-situ reduction treatment mode, 2006 IPCC Guidelines for National Greenhouse Gas Inventories, developed by the United Nations Intergovernmental Panel on Climate Change (IPCC) and life cycle method were used to perform the corresponding assessment and analysis on the data collected from the one-year investigation of pilot communities located in Ganquan Street, Putuo District, Shanghai, with 2 365 households. The results showed that, compared with the traditional mixed garbage treatment mode, the food waste in-situ reduction treatment mode could generate 7.8 kWh more electricity, reduce the solid transportation volume by 0.3 t and the net carbon emissions by 1.4×10?2 t CO2 when treating 1t raw garbage. According to Shanghai’s daily garbage production of 2.1×104 t, it could generate 1.64×105 kWh more electricity per day, reduce the solid transportation volume by 6 300 t per day and the net carbon emissions by 294 t CO2 per day. The food waste in-situ reduction treatment mode based on solid-liquid separation played an important role in reducing the carbon emissions of domestic garbage treatment and disposal. And the research results would provide necessary data support for the classification and treatment of garbage in China. Key words:garbage classification/ food waste source reduction/ solid-liquid separation/ full chain carbon footprint.
图1传统混收混运处理模式清单边界 Figure1.Boundary list of traditional waste disposal mode
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1.School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai 200093, China 2.Beijing Jinghuan Intelligence Environmental Protection Technology Co. Ltd., Beijing 100101, China 3.School of Environmental Science and Engineering, Tongji University, Shanghai 200092, China 4.Pangang Group Xichang Steel and Vanadium Co. Ltd., Xichang 615000, China Received Date: 2019-08-26 Accepted Date: 2019-11-01 Available Online: 2020-05-06 Keywords:garbage classification/ food waste source reduction/ solid-liquid separation/ full chain carbon footprint Abstract:In July 2019, Shanghai took the lead in implementing garbage classification. The classification and treatment of food waste is a serious problem in garbage sorting. At the garbage sorting station in community, solid-liquid separation for the food waste by the disposer is a pilot measure to achieve the food waste source reduction. In order to further compare the carbon emissions between two different modes, namely, traditional mixed garbage treatment mode and the food waste in-situ reduction treatment mode, 2006 IPCC Guidelines for National Greenhouse Gas Inventories, developed by the United Nations Intergovernmental Panel on Climate Change (IPCC) and life cycle method were used to perform the corresponding assessment and analysis on the data collected from the one-year investigation of pilot communities located in Ganquan Street, Putuo District, Shanghai, with 2 365 households. The results showed that, compared with the traditional mixed garbage treatment mode, the food waste in-situ reduction treatment mode could generate 7.8 kWh more electricity, reduce the solid transportation volume by 0.3 t and the net carbon emissions by 1.4×10?2 t CO2 when treating 1t raw garbage. According to Shanghai’s daily garbage production of 2.1×104 t, it could generate 1.64×105 kWh more electricity per day, reduce the solid transportation volume by 6 300 t per day and the net carbon emissions by 294 t CO2 per day. The food waste in-situ reduction treatment mode based on solid-liquid separation played an important role in reducing the carbon emissions of domestic garbage treatment and disposal. And the research results would provide necessary data support for the classification and treatment of garbage in China.
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