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水泥窑共处置废白土的环境效益分析
引用本文:李璐,黄启飞,蔡木林,闫大海.水泥窑共处置废白土的环境效益分析[J].中国环境科学,2010,30(6):808-815.
作者姓名:李璐  黄启飞  蔡木林  闫大海
作者单位:中国环境科学研究院固体废物污染控制技术研究所,北京,100012
基金项目:"十一五"国家科技支撑计划 
摘    要:以废白土为研究对象,应用生命周期评价法(LCA)对水泥窑共处置和焚烧炉处置系统3个类别的环境影响人类健康(HH)、生态系统质量(EQ)和资源(R)]进行研究和对比分析.结果表明,水泥窑共处置废白土有利于环境的可持续发展,焚烧炉处置对环境的影响较大.水泥窑共处置和焚烧炉处置功能单位废白土的总环境负荷分别为-1.03,0.273Pt,前者的环境负荷比后者减少了477%,相应各指标的减少率为:HH 413%, EQ 479%, R 36.9%. EQ在2种处置方式的LCA中均为最敏感的影响指标.水泥窑系统中,避免了贡献率占97%以上的矿山开采阶段的环境影响,是降低整个系统环境影响的关键环节;焚烧炉系统中,电力消耗是造成环境破坏的重要阶段,对各影响指标都有很高的贡献率.二 、苯、重金属的排放是水泥窑共处置废白土的主要影响因子;粉尘和重金属排放对焚烧处置系统的影响较大.

关 键 词:水泥窑共处置  焚烧炉  废白土  生命周期评价  环境效益  
收稿时间:2009-08-24;

Environmental benefits of co-processing spent bleaching clay in cement kiln based on life cycle assessment
LI Lu,HUANG Qi-fei,CAI Mu-lin,YAN Da-hai.Environmental benefits of co-processing spent bleaching clay in cement kiln based on life cycle assessment[J].China Environmental Science,2010,30(6):808-815.
Authors:LI Lu  HUANG Qi-fei  CAI Mu-lin  YAN Da-hai
Abstract:Life cycle assessment was used to compare the environmental impact of two disposal ways for spent bleaching clay: co-processing in a cement kiln and incineration in common hazardous waste incinerator. Three environmental impact categories, human health (HH), ecosystem quality (EQ) and resource (R) were quantified. Co-processing in cement kiln was more beneficial for sustainable development of environment than common incineration. The environment burdens were -1.03, 0.273Pt for co-processing and incinerating system, respectively. The whole burden in co-processing system was reduced by a factor of 479%, compared to that in incinerating system. The reduction rates for HH, EQ and R were 413%, 479% and 36.9%, respectively. EQ was the most sensitive impact category for both LCA of co-processing and incinerating systems. It contributed greatly for the reduction of environmental burden in co-processing system that raw material mining, which account for 97% of total environmental burden. In the incinerating system, electricity consumption made the greatest contribution for all the 3 environmental impact categories. Dioxin, benzene and heavy metals were the most important factors for co-processing spent bleaching clay in cement kilns, while dust and heavy metals were the most important ones to the incinerating system.
Keywords:co-processing in cement kiln  incinerator  spent bleaching clay  life cycle assessment  environmental benefits
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