Life cycle assessment of co-processing of obsolete pesticides in a cement kiln using EI 99 method
基于生命周期评价EI 99法的水泥窑共处置废弃农药分析

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.