改性粉煤灰吸附-高级氧化法处理奥里油废水  

Treatment of Orimulsion Wastewater by Modified Fly Ash Adsorption-Advanced Oxidation Process

作　　者：陈英[1] 谢文玉[1] 潘向君[1] 

机构地区：[1]茂名学院化工与环境工程学院,广东茂名525000

出　　处：《化工环保》2008年第5期437-442,共6页Environmental Protection of Chemical Industry

基　　金：广东省自然科学基金资助项目(7301284);茂名市科技计划项目(2006018)

摘　　要：将氯化铁改性粉煤灰(简称改性粉煤灰)吸附处理与高级氧化和生物处理等技术进行优化组合,以期得到简便而有效的处理奥里油废水(简称废水)的组合工艺。研究结果表明:在废水 COD 平均为4 600 mg/L、改性粉煤灰加入量为50g/L、废水 pH 为7～9、吸附时间为1 h 的条件下,COD 去除率达30%。采用"改性粉煤灰一次吸附—湿式均相催化氧化—厌氧生物过程—改性粉煤灰二次吸附"组合工艺处理废水时,改性粉煤灰不但具有较好的预处理效果,且还有较好的后处理能力;湿式均相催化氧化的催化剂用量少(Cu(NO_3)_2为2.0g/L)、操作条件温和(2.5 MPa,180℃,pH 5～7,1 h);厌氧生物过程中不需特殊筛选的菌种,易操作控制;经该组合工艺处理后,废水 COD 从4 600 mg/L降至55 mg/L,COD 去除率为98.4%,达到 GB8978—1996《污水综合排放标准》的一级排放标准。Orimulsion wastewater was treated by ferric chloride modified fly ash adsorption -advanced oxidation process. In the modified fly ash adsorption, when the influent COD is 4 600 mg/L, the modified fly ash dosage is 50 g/L, the wastewater pH is 7 -9, and the adsorption time is 1 h, the removal rate of COD is 30%. When the combined process is consisted of modified fly ash primary adsorption-wet air homogeneous catalytic oxidation-anaerobic biological treatment-modified fly ash secondary adsorption, the modified fly ash has not only a better pretreatment effect, but also a better aftertreatment effect. Under the conditions of catalyst Cu （NO3 ）2 dosage 2.0 g/L, pressure 2.5 MPa, temperature 180℃, wastewater pH 5 -7, reaction time 1 h, the wastewater COD is reduced from 4 600 mg/L to 55 mg/L with 98.4% of COD removal, which can meet the national first grade wastewater discharge standard of GB8978 - 1996. The process is characterized by less dosage of catalyst, moderate operating conditions, not requiring special strains in anaerobic treatment, and easy operating and controlling.

关 键 词：奥里油废水 改性粉煤灰 高级氧化 生物处理 化学需氧量 

分 类 号：X703.1[环境科学与工程—环境工程]