流化床三维电极深度处理煤焦油加工废水及其机理  

Advanced treatment of coal tar wastewater and mechanism by fluid three-dimensional electrode reactor

作　　者：王万鹏[1] 周集体[1] 张劲松[1] 

机构地区：[1]大连理工大学环境与生命学院工业生态与环境工程教育部重点实验室,辽宁大连116024

出　　处：《煤炭学报》2010年第1期122-125,共4页Journal of China Coal Society

基　　金：辽宁省水体污染控制与治理科技重大专项(2008ZD07208-004-2)

摘　　要：采用流化床三维电极反应器对煤焦油加工废水生化出水进行了深度处理,用石墨电极代替传统电Fenton试剂体系中的铁阳极,对电解条件进行了考察,并对其降解机理进行了初步分析。确定最佳电解条件:电场强度为1.5 V/cm,曝气强度为30 m3/(m2.h),pH=2,活性炭粒子电极浓度100 g/L。反应时间60 min,实验获得最大COD去除率为70%,脱色率为84%,同时B/C(BOD5/CODcr)提高了3倍。通过紫外光谱和液相色谱分析表明,部分化合物被彻底降解,电解反应过程中废水组成成分发生改变。电解出水可达国家一级排放标准,无二次污染。Advanced treatment of coal tar wastewater by three-dimensional fluid electrode was studied. Graphite electrodes were used in the reactor instead of iron electrodes which used in traditional electro-fenton process. The excellent process conditions and degradation mechanism were investigated. Optimum operating conditions are that electric field strength is 1.5 V/cm,air flux density is 30 m^3/（ m^2 · h） ,pH is 2 ,and 100 g/L of activated carbon. Under the conditions,the removal rate of CODer and decoloration rate are 70% and 84% respectively within 60 min, and the B/C （ BODs/CODcr） ratio increases three times. The analysis results of UV spectrum and HPLC show that part of chemicals are completely degraded and compositions of the wastewater are changed during the electrolysis reaction. The effluent is able to reach China national discharge standard I without any secondary pollution.

关 键 词：三维流化床电极 煤焦油废水 紫外光谱 

分 类 号：X703[环境科学与工程—环境工程]