采用全生命周期方法评价以市政污泥为原料的水泥的环境影响

Using whole life cycle method to evaluate environmental impact of cement with municipal sludge as one of raw materials

采用生命周期评价(LCA)方法对以市政污泥为原料的水泥整个生产过程的环境影响进行了评价和对比分析。选定了气候变化(GWP)、环境酸化(AP)、非生物资源消耗(ADP)、富营养化(EP)、可吸入无机物(RI)以及光化学臭氧合成(POFP)6种环境影响类型作为评价指标。经过LCA计算得出,水泥熟料生产中掺入5%的市政污泥,可以使水泥生产过程的六种环境影响得到不同程度的降低,GWP、ADP、AP、EP、RI和POFP分别降低0.75%,14.45%,9.04%,0.44%,3.23%,6.47%。

Life cycle assessment(LCA)method was used to evaluate and compare the environmental impact of the whole production process of cement using sludge as raw material.Six environmental impact types including Global Warming Potential(GWP),Acidification Potential(AP),Abiotic Depletion Potential(ADP),Eutrophication Potential(EP),Respirable Inorganic material(RI),and Photochemical Ozone Formation Potential(POFP)were selected as evaluation indicator.LCA calculates shows that applying 5%municipal sludge to cement clinker production can reduce the six environmental impacts of the cement production process to varying degrees.GWP,ADP,AP,EP,RI,POFP decreased by 0.75%,14.45%,9.04%,0.44%,3.23%,6.47%respectively.