Life cycle assessments of the integrated model for collection,transportation and disposal of food wastes:A case study of Tianjin city
Under the background of the continuous promotion of garbage classification and the construction of"zero-free city"in China,the integration of collection,transportation,disposal and utilization for food wastes has become an important link in the industry chain of urban solid waste recycling.Taking Tianjin City as an example,this study used Geographic information System(ArcGIS)to analyze the characteristics of food wastes production and discharge in Tianjin City,obtained the information of collection and transportation mode through field investigation,and summarized four treatment technical routes,which are high-temperature fermentation,incineration power generation,anaerobic and co-anaerobic digestion.Life cycle assessment(LCA)was used to evaluate the environmental impacts of the integrated mode of collection,transportation and disposal for food wastes.The results indicated that all four routes had environmental benefits,and the value of net environmental impact potential from low to high were high-temperature fermentation route(-0.030 8),co-anaerobic route(-0.029 9),mono-anaerobic route(-0.024 5)and incineration route(-0.005 7),respectively.The sensitivity analysis indicatesd that increasing the oil extraction rate from food wastes and reducing the transportation distance could both reduce the environmental impact potential.Besides,optimizing the three-phase separation technology to enhance the oil extraction rate is identified as a more feasible and efficient approach to reduce the environmental impact potential.
life cycle assessmentfood wasteenvironmental impactsensitivity analysis
国家科技期刊平台
NSTL
万方数据
