城市生活垃圾焚烧飞灰与矿山废水共处置技术研究与工程应用

Co-disposoal research and engineering application of municipal solid waste incineration( MSWI) fly ash and acid mine drianage

以城市生活垃圾焚烧飞灰和矿山酸性废水无害化处理为研究对象,设计了一条城市生活垃圾焚烧飞灰与矿山酸性废水共处置技术路线,利用焚烧飞灰和矿山酸性废水的酸碱性,加入重金属稳定化药剂,经处理可实现矿山酸性废水和垃圾焚烧飞灰中重金属的有效去除和稳定。矿山酸性废水的p H由2.33升至中性,废水中重金属Cu、Pb、Zn、Cd、Mn、Fe和As等浓度均有下降,可满足国家《污水综合排放标准》(GB 8978-1996)相关标准;垃圾焚烧飞灰中重金属Pb、Zn和Cd浸出浓度分别降低了92.1%、73.4%和95.2%,满足危险废物鉴别标准(GB 5085.3-2007)。

This study examined municipal solid waste incineration（ MSWI） fly ash and acid mine drainage（ AMD） and designed a co-disposal route for both. The removal and stability were achieved by acid alkaline regulation and the addition of a heavy metal stabilization agent. Post-treatment results showed that the p H of AMD increased from 2. 33 to neutral. The leaching concentrations of the heavy metals Cu,Pb,Zn,Cd,Mn,Fe,and As met the national Integrated Wastewater Discharge Standards（ GB 8978-1996）. The leaching concentrations of the heavy metals Pb,Zn,and Cd in MSWI fly ash were reduced 92. 1%,73. 4%,and 95. 2%,respectively,and met the Identification Standards for Hazardous Wastes（ GB 5085. 3-2007）.