类Fenton氧化_好氧移动床生物膜法处理抗生素发酵废水_邢子鹏

第一作者:邢子鹏,男,1981年生,博士研究生,主要从事水污染控制研究。#通讯作者。＊国家“973计划”项目(No.2004CB418505)。类Fenton氧化—好氧移动床生物膜法处理抗生素发酵废水＊邢子鹏商佳吉孙德智#(哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150090)摘要采用类Fenton氧化—好氧移动床生物膜(MBBR)法处理难降解抗生素发酵废水,探讨了H2O2和草酸投加量对类Fenton氧化工艺以及HRT和曝气量对好氧MBBR反应器的影响。实验结果表明,当类Fenton氧化工艺的最佳操作参数为反应溶液H2O2和草酸初始质量浓度分别为150、45mg/L、30W/154nm紫外灯照射1h、pH为3.0,在曝气搅拌条件下,COD平均去除率为80.9%。当类Fenton氧化工艺出水pH在7.0时,废水中的污染物还可以进一步被混凝去除。好氧MBBR反应器的最佳工艺参数为HRT12h、曝气量0.10m3/h以及填料填充比(体积比)30%,最终废水COD平均去除率为99.1%,达到《污水综合排放标准》(GB8978—1996)三级标准要求。关键词抗生素发酵废水类Fenton氧化好氧移动床生物膜CODEnhancedFentonoxidationandbiodegradationinaerobicmovingbedbiofilmreactorfortreatmentofantibioticfermenta-tionwastewaterXingZipeng,ShangJiaji,SunDezhi.(SchoolofMunicipal&EnvironmentalEngineering,Har-binInstituteofTechnology,HarbinHeilongjiang150090)Abstract:TheenhancedFentonoxidationandbiodegradationinanaerobicmovingbedbiofilmreactor(MBBR)wasemployedforthetreatmentofahighconcentrationrefractoryantibioticfermentationwastewater.Therawwastewaterwaspretreatedbycoagulationandsedimentationusingpolymericironsulfate(PFS)asthecoagulanttoremoveabout50%oforganicloadingandtoprovidetheessentialFe2+forthesubsequentFentonoxidation,whichwasenhancedbyUVirradiationandtheadditionofoxalicacidtoachievefurtherorganicremovalandtoimprovebio-degradabilityoftheresidualorganicconstituentsfortheirfinalremovalintheMBBR.TheeffectsofH2O2andoxalicaciddosesontheFentontreatmentandHRTandaerationrateontheMBBRperformancearepresented.Employing150mg/LofH2O2,45mg/Lofoxalicacid,theFentonoxidationunderUVilluminationfor1hatpH3.0withaera-tiontosupplytheDO,removed80.9%ofCOD.AfterthesecondstageofsedimentationatpHof7.0,thesuperna-tantwasbiotreatedintheMBBR(30%filledwiththebiofilmcarrier)operatingataHRTof12handanaerationrateof0.10m3/h.Thehighlyeffectivecombinedtreatmentconsistentlyremoved>99%COD;thefinaleffluentmetthedischargelimitsofthepharmaceuticalindustry.Keywords:antibioticfermentationwastewater;enhancedFentonoxidation;movingbedbiofilmreactor(MBBR);COD抗生素发酵废水含有难降解物质和有抑菌作用的抗生素等毒性物质,而且由于药物生产过程中药物品种和生产工艺的不同,产生的废