O-3-H-2O-2深度处理煤气化废水的实验研究-王兰
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2020-02-28 10:45:16
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O3/H2O2深度处理煤气化废水的实验研究王兰1,2,乔瑞平1,2,3,俞彬2,3,徐大伟2,3,魏祥甲1,2,耿翠玉1,2,于丰玮2,3,曾华湘2,3(1.博天环境研发中心,北京101500;2.博天环境集团股份有限公司,北京100082;3.博天(北京)环境设计研究院有限公司,北京100051)[摘要]采用臭氧高级氧化技术对煤气化废水进行了处理,考察各影响因子对其处理效果的影响。实验结果表明:在反应时间为40min、pH为8.78、臭氧和H2O2投加量分别为126.2、57mg/L的条件下,废水COD降到44.9mg/L,去除率达64.42%;色度降到6倍,去除率达99.00%;浊度降到0.34NTU,去除率达68.81%;B/C由0.04提高到0.34。O3/H2O2技术处理效果优于单独臭氧氧化技术,且最佳pH有所降低。保持H2O2总投量相同,多次投加的去除效果明显优于一次性投加,且逐渐增大的投加方式下COD去除率最高。[关键词]煤气化废水;臭氧氧化;高级氧化[中图分类号]X703.1[文献标识码]A[文章编号]1005-829X(2015)08-0026-05ExperimentalresearchontheadvancedtreatmentofcoalgasificationwastewaterbyO3/H2O2processWangLan1,2,QiaoRuiping1,2,3,YuBin2,3,XuDawei2,3,WeiXiangjia1,2,GengCuiyu1,2,YuFengwei2,3,ZengHuaxiang2,3(1.PotenEnvironmentResearch&DevelopmentCenter,Beijing101500,China;2.PotenEnvironmentGroupCo.,Ltd.,Beijing100082,China;3.Poten(Beijing)EnvironmentDesign&ResearchInstituteCo.,Ltd.,Beijing100051,China)Abstract:Advancedozoneoxidationprocesshasbeenusedfortreatingcoalgasificationwastewater.Theeffectsofvariousinfluencingfactorsonitstreatmenteffectivenessareinvestigated.Theexperimentalresultsshowthatunderthefollowingconditions:reactiontime40min,pH=8.78,andtheozoneandhydrogenperoxidedosageare126.2mg/Land57mg/L,respectively,theCODisdecreasedto44.9mg/L,theremovingratereaches64.42%,thechromaisde-creasedto6times,theremovingratereaches99%.Andtheturbidityisdecreasedto0.34NTU,theremovingratereaches68.81%.Meanwhile,theB/Cisincreasedfrom0.04to0.34.ThetreatmenteffectofO3/H2O2processisbetterthanthatofindividualO3oxidationprocess.Inaddition,theoptimumpHisdecreased.Experimentalresultsdemon-stratethatwiththesametotaldosageofhydrogenperoxide,theremovingeffectivenessobtainedbymultiple-dosingofhydrogenperoxideismuchhigherthanthatobtainedbyone-timedosing.ThehighestremovingrateofCODisachievedwhenthedosingamountofthehydrogenperoxideisincreasedgradually.Keywords:coalgasificationwastewater;ozonation;advancedoxidation煤气化废水主要来源于煤气洗涤、冷凝以及净化等过程,该种废水成分复杂,含有大量芳香烃类、酚类、杂环类、长链烷烃类、氰和氨氮等有毒有害物质,是一种典型的高毒性、高浓度、难生物降解的工业废水〔1〕。一般传统处理工艺对煤气化废水的处理效
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