高级氧化工艺处理煤化工浓盐水  

Treatment of reverse osmosis concentrate from coal chemical industry with advanced oxidation processes

作　　者：杨静[1] 王建兵[2] 王亚华[2] 张峰源[2] 何绪文[2] 

机构地区：[1]国家自然科学基金委员会,北京100085 [2]中国矿业大学(北京)化学与环境工程学院,北京100083

出　　处：《环境工程学报》2015年第8期3680-3686,共7页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20907072)

摘　　要：浓盐水处理是一项世界性难题,采用高级氧化工艺能有效去除废水中难降解有机物,从而提高其可处理性。分别采用臭氧氧化、O3/H2O2、GAC/O3和GAC/O3/H2O2等工艺处理煤化工浓盐水,研究了工艺参数对COD去除的影响,探索了有机物去除机理。研究表明,煤化工浓盐水中易被臭氧氧化的有机物大约占55%。增加臭氧投加量和气体流速能提高有机物去除效率。酸性条件下的COD去除率要高于碱性条件下。臭氧氧化、O3/H2O2、GAC/O3和GAC/O3/H2O2工艺中·OH稳定浓度分为4.1、37.7、5.9和41.3×10-14mol/L。O3与H2O2之间存在明显协同作用,GAC与O3协同产生·OH的作用不明显,但GAC对氧化过程中生成的生物抑制物具有较好的吸附去除作用。GAC、O3和H2O2三者之间的协同作用有助于去除煤化工浓盐水中难降解有机物、提高出水可生化性和降低出水水质毒性。The treatment of reverse osmosis concentrate is a worldwide difficult problem. The use of ad- vanced processes can effectively remove refractory organic compounds in the concentrate and improve its treat- ability. Ozonation, O3/H2O2, GAC/O3 and GAC/O3/H2O2 processes were used to treat reverse osmosis concen- trate from coal chemical industry. The effect of operation parameters on COD removal was studied and the mecha- nism for the removal of organic pollutants was investigated. The results show that seventy percent of organic com- pounds in the concentrate are easily oxidized by ozone. The removals of organic compounds increase with the dos- age of ozone and gas velocity. The COD removals obtained under acidic conditions are higher than those obtained under alkaline condition. The steady concentrations of · OH in ozonation, O3/H2O2, GAC/O3, GAC/O3/H2O2 processes are 4. 1, 37.7, 5.9 and 41.3 × 10^-14 mol/L, respectively. There is obvious synergistic effect between 03 and H2O2 for the production of · OH while no synergistic effect between 03 and granular activated carbon （GAC）. GAC shows high adsorption capacity to the biological inhibitors produced in the ozonation processes. The synergistic effect between GAC, ozone and H2O2 is helpful in removing the refractory organic compounds in the concentrate, improving the biodegradability and lowering the toxicity of the effluent.

关 键 词：臭氧氧化 煤化工浓盐水 可生化性 水质毒性 

分 类 号：X703[环境科学与工程—环境工程]