西北生态脆弱区城市生活垃圾处理厂适用性评价

针对西北生态脆弱区城市生活垃圾处理技术选择、处理厂选址和工程设计中存在的主观性较强、科学性和客观性不足的问题，将生命周期评价法与层次分析法相耦合，综合考虑环境影响、处置技术、地理气候与实际工程4个方面因素建立综合评价体系，并以兰州市城市生活垃圾处理现状为例，分别对9个生活垃圾处理厂进行技术适用性综合评价.结果表明：①兰州市城市生活垃圾处理厂适用性综合得分前3名分别为餐厨垃圾资源化堆肥厂（73.91分）、韩家咀村生活垃圾填埋场（72.93分）、中铺子垃圾焚烧厂（72.44分）；②城市生活垃圾处理技术评价体系中，各影响因素权重排序为环境影响因素（0.347）>实际工程因素（0.309）>处置技术因素（0.228）>地理气候因素（0.116）；③3种处理技术的环境影响潜值比较结果为：垃圾卫生填埋（0.3872）>垃圾焚烧（0.0330）>垃圾堆肥（0.0242）.

The optimization of municipal solid waste treatment technology in the ecological fragile areas of northwest China

In order to solve the problems of strong subjectivity, less scientificity and objectivity in the selection process of municipal solid waste treatment technologies, municipal solid waste treatment plants, and engineering design in the ecologically fragile northwestern area, the life cycle assessment method has been combined with the analytic hierarchy process, and the factors of four aspects including the environmental impact, treatment technology, geographic climate and actual engineering are considered to establish a comprehensive evaluation system. Taking the status of municipal solid waste treatment in Lanzhou as an example, a comprehensive evaluation of the applicability of nine municipal solid waste treatment facilities was carried out. The results showed that: (1)The comprehensive scores for the applicability of the top three treatment facilities in the descending order were the kitchen waste resource composting plant (73.91 points), the Hanjiazui village municipal solid waste landfill plant (72.93 points), and the Zhongpuzi waste incineration plant (72.44 points); (2)In the evaluation system of municipal solid waste treatment technology, the ranking of the weights of the influencing factors from the most important to the least was environmental impact (0.347), actual engineering (0.309), disposal technology (0.228), and geographic climate (0.116); (3) The comparison results of the potential environmental impact values of these three treatment technologies were sanitary landfill (0.3872), waste incineration (0.0330), and waste composting (0.0242),respectively.