铁炭微电解-Fenton组合工艺深度处理焦化废水  

Advanced treatment of coking wastewater by combined process of iron-carbon micro-electrolysis and Fenton

作　　者：李思敏[1] 刘建胜[1] 徐明[2] 缪保芬 

机构地区：[1]河北工程大学城市建设学院,河北邯郸056038 [2]西安市政设计研究院有限公司,西安710000 [3]东营经济技术开发区城市管理局,山东东营257300

出　　处：《工业用水与废水》2016年第3期22-27,共6页Industrial Water & Wastewater

基　　金：国家水体污染控制与治理科技重大专项(2012ZX07203-003);河北省应用基础研究计划重点基础研究项目(12966738D);河北省应用基础研究计划重点基础研究项目(16964213D)

摘　　要：采用铁炭微电解-Irenton组合工艺对焦化废水进行深度处理，考察初始pH值、铁炭质量比、铁炭微电解反应时间、铁炭投加量、H2O2投加量和Fenton反应时间等因素对处理效果的影响。结果表明，铁炭微电解的最佳运行条件为：初始pH值为2，反应时间为90min，铁炭投加量为80∥L，铁炭质量比为3：1。Fenton氧化的最优运行条件为：H2O2的投加量为2mL／L，反应时间为30min。当试验原水CODCr的质量浓度为237～248mg／L，色度为250～270倍时，在最佳运行工况条件下，经组合工艺处理后其出水COD。的质量浓度为108～114mg／L，去除率在51．9％以上，达到GB16171—2012《炼焦化学工业污染物排放标准》中间接排放标准的要求。出水色度为20～25倍．去除率在90．0％以上。达到GB8978—1996（（污水综合排放标准》中一级排放标准的要求。Iron-carbon micro-electrolysis-Fenton combined process was used to treat coking wastewater, the influence of pH value, mass ratio of iron to carbon, reaction time of iron-carbon micro-electrolysis, dosage of iron-carbon and H2O2, Fenton reaction time and some other factors on treatment effect was investigated. The re- sults showed that, the optimal operating condition for iron-carbon micro-electrolysis was： the initial pH value was 2, the reaction time was 90 min, the The optimal operating condition for dosage of iron-carbon was 80 g/L, the mass ratio of iron to carbon was 3 ： 1 Fenton oxidation was： the H202 dosage was 2 mg/L, the reaction time was 30 min. Using the said combined process to treat raw water with 237-248 mg/L of CODcr and 250-270 times of chroma under the optimal condition, the mass concentration of CODCr in the effluent water was 108-114 mg/L, the removal rate reached above 51.9%, which met the specification for indirect discharge standard of GB 16171-2012 Emission Standard of Pollutants for Coking Chemical Industry. Besides, the effluent chroma was 20-25 times, the removal rate was above 90.0%, which met the requirement of grade 1 in GB 8978--1996 Inte- gated W astewater Discharge Standard.

关 键 词：焦化废水 微电解 FENTON 深度处理 

分 类 号：X703.1[环境科学与工程—环境工程] X784