Rural Domestic Waste Processing Method Study Based On Life Cycle Assessment In Jianchang County Guzhangzi Township As An Example

With the rapid development of the rural economic and social society and the continuous improvement of the level of urban and rural integration,many uncoordinated and inadequate phenomena in the process of development in rural areas are very prominent,and the problem of rural domestic waste disposal is one of them.Because of the late start of environmental protection work in rural areas,a large number of rural domestic wastes is in the state of "three noes" without collection,transport and treatment,causing serious pollution to the living environment and the ecological environment.Therefore,it is of great theoretical and practical significance to carry out the research on the treatment of rural domestic waste,and to implement the construction of new socialist countryside and the implementation of the strategy of Rural Revitalization.In this paper,the sampling survey method was used to investigate the domestic waste status of 160 households in 8 administrative villages of Guzhangzi Township,Jianchang County for 1 year.The effects of season,population,economy and traffic factors on the output of garbage were discussed.On this basis,the life cycle assessment model was used for sanitary landfill,high temperature composting,incineration and treatment.Comprehensive treatment of 4 treatment methods to evaluate the environmental impact of global warming,acidification,eutrophication,photochemical pollution and ecotoxicity respectively.The environmental impact potential and the total environmental impact load of different treatments were calculated,and the economic,environmental,technical and social factors were analyzed by the fuzzy comprehensive evaluation method.The main conclusions are as follows:?1?The output of rural domestic waste is affected by different factors.Summer and winter are the peak of production.Population and production have positive correlation(r_{normal farmer}=0.645?r_{poor farmer}=0.860**).The economic level is positively related to production(r_{normal farmer}=0.646?r_{poor farmer}=0.809*),and the distance from the nearest market is negatively related to the output(r_{normal farmer}=-0.897**?r_{poor farmer}=-0.846**).?2?The contribution rate of different treatment methods to environmental impact potential is different.The potential contribution rate of the sanitary landfill to theenvironmental impact of photochemical pollution?89.71%?was the largest;the potential contribution rate of the high temperature composting to the environmental impact of eutrophication?38.18%?was the largest;the greatest contribution rate?51.21%?of the environmental impact potential of the incineration treatment to global warming?51.21%?;the maximum contribution rate of the comprehensive treatment to the environmental impact of the whole ball warming?36.44%?.?3?The environmental impact load?EIL?of different treatments is different.According to the LCA model,the environmental impact load of sanitary landfill?0.2497?>comprehensive treatment?0.0343?> incineration treatment?0.0291?> high temperature composting?0.0260?,and can be found.It can be seen that the value of high temperature composting is the smallest and the environmental impact is the smallest.?4?In the fuzzy comprehensive evaluation,the highest value of the high temperature composting for the economic factors;the highest value of the environmental factors in the sanitary landfill;the highest value of the technical factors in the sanitary landfill and the highest value for the social factors in the incineration treatment.If the total impact of various factors is considered,the value of sanitary landfill is the highest.Considering the economic,environmental,technical and social factors of Guzhangzi Township of Jianchang County,sanitary landfill treatment is still the main way to deal with the local development of domestic waste.