化工学报2013，Vol.64Issue(4)：1396-1402,7.DOI:10.3969/j.issn.0438-1157.2013.04.037
电化学氧化法处理垃圾焚烧发电厂沥滤液生化出水
Electrochemical oxidation of biologically treated leachate from municipal solid waste incineration plant
摘要
Abstract
Incineration is an effective technology for municipal solid waste (MSW) disposal. However, the MSW leachate after bio-treatment still contains recalcitrant organic compounds, higher concentration of chloride ions and biogenic colloids. Their electrochemical oxidation was conducted in a newly designed filter-press electrochemical reactor. In the electrochemical oxidation process, NH3-N could be easily removed by means of electro-generated chlorine/hypochlorite. The effects of major process parameters on the removal of organic pollutants were investigated systematically. Under experimental conditions, the optimum operation parameters are current density 65.35 mA · cm-2, flow velocity 2.72 cm · s-1 in electrode gap, initial chloride ion concentration 5000 mg · L-1 The COD in the leachate could be reduced below 100 mg · L-1 after 1 h of treatment. The kinetics and mechanism of COD removal were investigated by simultaneously monitoring the COD change and chlorine/hypochlorite production. The kinetics exhibits a two-stage kinetic model and the decrease of electro-generated chlorine/hypochlorite production is the major factor for slowing down of COD removal rate in the second stage. 50% of reduction in electrode gap can result in saving more than 25% of energy consumption. A compact multi-channel bipolar structure should be taken in the design of industrial electrochemical reactors for wastewater treatment.关键词
城市固体废弃物沥滤液/垃圾焚烧/电化学氧化Key words
municipal solid waste leachate/ refuse incineration/ electrochemical oxidation分类
资源环境引用本文复制引用
陈波,全学军,程治良,朱新才,张树汉..电化学氧化法处理垃圾焚烧发电厂沥滤液生化出水[J].化工学报,2013,64(4):1396-1402,7.基金项目
重庆市节能减排科技"接力"行动科技专项(CSTC2010AA7060). （CSTC2010AA7060）
