酸析与超声波-超重力-臭氧氧化法联合预处理二硝基甲苯废水  

Pretreatment of DNT Wastewater by Acid Precipitation and Ultrasonic-High Gravity-Ozone Oxidation Process

作　　者：焦纬洲[1] 刘有智[1] 侯晓婷[1] 申红艳[1] 白梅[1] 冯国琳[1] 

机构地区：[1]中北大学山西省超重力化工工程技术研究中心,山西太原030051

出　　处：《化工环保》2011年第3期239-243,共5页Environmental Protection of Chemical Industry

基　　金：火炸药青年创新基金资助项目(HZY06020301-11)

摘　　要：将二硝基甲苯废水(简称废水)酸析后进行超声波-超重力-臭氧氧化处理,考察了酸的种类及废水pH对酸析效果的影响。实验结果表明:加入质量分数98%的H2SO4溶液调节废水pH为1.0时,酸析效果较好,酸析后废水COD去除率为38.50%,硝基化合物的去除率为45.26%,酸析析出物为一硝基甲苯磺酸;酸析后废水经超声波-超重力-臭氧氧化处理5h后,COD去除率为94.04%,硝基化合物去除率为98.60%,BOD5/COD从无酸析时的0.21提高到0.68,酸析能够显著改善废水的可生化性。Dinitrotoluene （DNT） wastewater was treated by acid precipitation and ultrasonic-high gravity-ozone oxidation process. The effects of different acids and wastewater pH on acid precipitation were studied. The experimental results show that： When the wastewater pH is adjusted to 1.0 by adding H2SO4 solution with 98% of mass fraction, the effect of acid precipitation is better with 38.50% of COD removal rate and 45.26% of nitro compound removal rate, and the precipitate is mononitrotoluene sulfonic acid; After the acid-precipitated wastewater was treated by ultrasonic-high gravity-ozone oxidation process for 5 h, the removal rates of COD and nitro compounds are 94.04% and 98. 60% respectively, and comparing with the no-precipitation process, the BOD5/COD is increased from 0.21 to 0.68. It indicates that the biodegradability of the gypsum wastewater can be improved significantly by acid precipitation.

关 键 词：酸析 二硝基甲苯 超声波 超重力 臭氧氧化 生化法 废水处理 

分 类 号：TQ560.9[化学工程—炸药化工]