类Fenton氧化—好氧移动床生物膜法处理抗生素发酵废水
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2020-04-05 17:53:38
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邢子鹏等类Fenton氧化一好氧移动床生物膜法处理抗生素发酵废水类Fenton氧化一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氧化一好氧移动床生物膜(MBBR)法处理难降解抗生素发酵废水,探讨了HzO2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H202和草酸初始质量浓度分别为150、45rag/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8O.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0.10ma/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b(GB8978-1996)~.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cODEnhancedFentonoxidationandbi0degradati0ninaerobicmovingbedbiofiImreactorfortreatmentofantibioticfermenta-tionwastewaterXingZipeng,ShangJiaji,SunDezhi.(SchoolofMunicipal&EnvironmentalEngineering,Har—binInstituteofTechnology,HarbinHeilongjiang150090)Abstract:TheenhancedFentonoxidationandbiodegradationinanaerobicmovingbedbiofilmreactor(MBBR)wasemployedforthetreatmentofahighconcentrationrefractoryantibioticfermentationwastewater.Therawwastewaterwaspretreatedbycoagulationandsedimentationusingpolymericironsulfate(PFS)asthecoagulanttOremoveabout50oforganicloadingandtoprovidetheessentialFeforthesubsequentFentonoxidation,whichwasenhancedbvUVirradiationandtheadditionofoxalicacidtOachievefurtherorganicremovalandtOimprovebio-degradabilityoftheresidualorganicconstituentsfortheirfinalremovalintheMBBR.TheeffectsofH2O2andoxalicaciddosesontheFentontreatmentandHRTandaerationrateontheMBBRperformancearepresented.Employing150mg/LofH2O2,45mg/Lofoxalicacid,theFentonoxidationunderUVilluminationfor1hatpH3.0withaera—tiontOsupplytheDO,removed8O.9ofCOD.AfterthesecondstageofsedimentationatpHof7.0,thesuperna—tantwasbiotreatedintheMBBR(30filledwiththebiofilmcarrier)operatingataHRTof12handanaerationrateof0.10m。/h.Thehighlyeffectivecombinedtreatmentconsistentlyremoved>99COD;thefinaleffluentmetthedischarge1imitsofthepharmaceuticalindustry.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,产生的废水水质和水量存在着较大的差异,极不稳定,成为现代工业废水治理难题之一_1]。国内外对抗生素发酵
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