城市生活垃圾焚烧发电对于减少和再利用固体废物具有重要意义。该研究对中国城市生活垃圾焚烧的环境和经济进行了综合评估,从“从摇篮到坟墓”的角度来看,以1吨城市固体废物焚烧为功能单元。还计算了每个月的环境影响,以分析一年中的动态变化。结果表明,环境影响主要集中在海洋生态毒性,淡水生态毒性,人类致癌毒性,和人类非致癌毒性。烟气净化,垃圾焚烧和运输是关键流程,占65.61%,18.50%,以及整体环境影响的11.93%,分别。尿素,活性炭,螯合剂(EDTA)和柴油运输是关键因素。寿命周期成本(LCC)为132.26元/吨废物,其中初始资本造成最大的经济成本。当考虑城市生活垃圾焚烧发电以替代电网供电时,取得显著的环境效益,归一化环境影响值由0.85变为-12.19。研究结果为城市生活垃圾处理在整个生命周期内减轻环境影响和减轻经济负担提供了参考。
Municipal solid waste
incineration for power generation is significant for reducing and reusing solid waste. The study conducted an integrated assessment of environment and economy on municipal solid waste
incineration in China, from a \"cradle to grave\" perspective using 1 tonne of municipal solid waste
incineration as the functional unit. The environmental impacts of each month are also calculated to analyze the dynamic change throughout one year. The results indicate that the environmental impacts are mainly concentrated in marine ecotoxicity, freshwater ecotoxicity, human carcinogenic toxicity, and human non-carcinogenic toxicity. Flue gas purification, waste
incineration and transportation are the key processes, which account for 65.61 %, 18.50 %, and 11.93 % of the overall environmental impact, respectively. Urea, activated carbon, chelating agent (EDTA) and diesel fuel for transportation are key factors. The life cycle cost (LCC) is 132.26 RMB/t of waste, of which the initial capital causes the largest economic cost. When considering power generated from municipal solid waste
incineration to replace electricity supply from the power grid, it achieves significant environmental benefits and the normalized environmental impact value changes from 0.85 to -12.19. The findings provide references for municipal solid waste treatment to mitigate the environmental impact and reduce the economic burden across the entire life cycle.