基于生命周期评价EI99法的水泥窑共处置废弃农药分析

以废弃农药为研究对象,应用生命周期评价法从人类健康(HH)、生态系统质量(EQ)和资源(R)3个角度对水泥窑共处置和焚烧炉处置的环境影响做出定性和定量评估.结果表明,废弃农药在水泥窑中共处置更具环境合理性.在水泥窑共处置和焚烧炉处置中,功能单位(1t)废弃农药总环境负荷(也称为环境影响潜值)分别为-27.5和0.379Pt,前者的环境负荷比后者减少了7360%,人类健康(HH)、生态系统质量(EQ)和资源(R)等各指标分别减少372%、5840%、-40.0%.废弃农药水泥窑共处置在原/燃料的获取阶段可避免57.4%的环境负荷,是降低水泥窑共处置环境影响的关键环节.焚烧和电力生产阶段的污染排放对焚烧炉处置中各指标都有很高的贡献率.二英、苯、重金属是水泥窑共处置废弃农药的主要影响因子;NOx和粉尘对焚烧系统的影响较大.

Life cycle assessment of co-processing of obsolete pesticides in a cement kiln using EI99 method

A project test was processed to analyze the environmental benefits of co-processing obsoleted pesticide in a cement kiln of plant A. By using Life Cycle Assessment method, three environmental impact categories were qualified and quantified, namely, human health (HH), ecosystem quality (EQ) and resource (R), then compared to that of treatment in common incinerator. The results showed that co-processing obsoleted pesticide in cement kilns were more beneficial to sustainable development of environment, by contraries, incinerators treatment system were impact to environment. The environment burden of functional unit in co-processing system and incinerating system were -27.5 and 0.379 yr.p respectively. The whole burden of the former was reduced by 7.36×103% comparing with the later. Each impact index reduced as: HH: 372%, EQ: 5.84×103%, and R: -40.0%. Totality, EQ was the most sensitive impact category for both systems. In the co-processing system, mining was the most important phase to environment that reached for 97% of total avoidable burden. However, in incinerating system, both incinerating process and electricity production were the main phase contributed to all impact items. After identifying the impact factors, it indicated that dioxin, benzene and heavy metals were the most important reason to co-processing obsoleted pesticide in cement kilns, while NOx and dust were more sensitive to incinerating system.