臭氧-生物活性炭工艺去除工业废水中难降解有机物的试验  

Experimental research on removing refractory organics from industrial waste water with ozone-BAC processes

作　　者：李瑞瑞[1] 姜琪[1] 余耀宏[1] 毛进[1] 王璟[1] 李文涛[1] 蒲平[2] 郭维忠[2] 

机构地区：[1]西安热工研究院有限公司,陕西西安710032 [2]华能新疆能源开发有限公司,新疆乌鲁木齐830017

出　　处：《热力发电》2016年第1期99-104,共6页Thermal Power Generation

基　　金：中国华能集团公司总部科技项目(HNKJ13-H12)

摘　　要：某电厂工业废水中有机物含量较高,而BOD5/COD(B/C)很低,直接生物处理效果不佳。对此,本文通过臭氧氧化提高废水中难降解有机物的可生化性,再联合生物活性炭(BAC)工艺处理该废水,同时对臭氧接触氧化时间、原水pH值及臭氧投加量对氧化效果的影响,以及对臭氧-生物活性炭工艺(O3-BAC)的整体性能进行了分析研究。结果表明:臭氧氧化最佳工艺条件为臭氧接触氧化时间15min、原水pH值约为8.00、按O_3/TOC质量比为3.0投加臭氧;臭氧氧化后原水B/C值可提高到0.21左右,总有机碳(TOC)的去除率为33.95%,化学需氧量(COD)的去除率为47.69%;O3-BAC工艺在进水流量为0.60L/h时对有机物的去除效果最优,产水TOC质量浓度平均约为11.30 mg/L,对TOC的去除率高达70%;产水COD质量浓度平均约为42.00mg/L,对COD的去除率约为68%;原水浊度平均降低87.08%。O3-BAC工艺运行期间,产水温度、pH值、溶解氧量在正常范围内,表明O3-BAC工艺运行稳定。The organic content was high in the industrial waste water of a power plant,but the BOD5/COD（B/C）was low,so it had a poor effect to treat the waste water in biological treatment method.To promote the biodegradability of the refractory organics,the waste water was treated by ozone oxidation combined with biological active carbon（O3-BAC）.Then the effects of ozone oxidation time,the pH value of raw water and the dosage of ozone in ozone oxidation test were researched,and the overall performance of O3-BAC was analyzed.The results showed that the ozone contract time was in 15 minutes,the pH value of raw water was in 8.0,the dosage of ozone was according to mass ratio of O3/TOC 3.0,which was the optimal technological condition.After ozone oxidation the B/C of raw water can be promoted to 0.21,and the removal efficiency of TOC was 33.95%,as well as the COD was 47.69%.In O3-BAC processes,when the water flow was in 0.60L/h,the average mass concentration of TOC was 11.30mg/L,the removal rate can be promoted to 70%,and the removal rate of COD can reach to 68%.Under different working condition,raw water was reduced to 87.08%.O3-BAC processes ran stably.

关 键 词：臭氧 生物活性炭 工业废水 循环水排污水 难降解有机物 去除率 

分 类 号：X703.1[环境科学与工程—环境工程]