焦化废水驯化的EGSB反应器内颗粒污泥产甲烷活性_董春娟

焦化废水驯化的EGSB反应器内颗粒污泥产甲烷活性董春娟1,冯美荣2,王海会3,陈素云1,汪艳霞1(1.太原大学环境工程系,山西太原030009;2.太原市科技局科技交流中心,山西太原030009;3.中北大学化工与环境学院,山西太原030051)摘要:为了确定处理焦化废水的EGSB反应器快速启动和高效稳定运行的可行性,在22～27℃的环境温度下,稳定进水COD为2200mg/L左右,通过逐渐提高焦化废水的添加比例来驯化EGSB反应器内的颗粒污泥,待进水完全为焦化废水后开始微氧曝气,对驯化过程中以及微量曝气后污泥产甲烷活性的变化进行了研究。结果表明:焦化废水会对EGSB反应器内颗粒污泥产生毒性抑制作用,使其产甲烷活性明显降低,与未添加焦化废水时相比,添加比例为100%时产甲烷活性降幅达75.8%。但颗粒污泥真正的产甲烷活性却几乎没有被抑制,当以乙酸钙为基质时产甲烷活性的降幅仅为6.23%。焦化废水对污泥产甲烷活性的抑制是可逆的,随着微生物菌群逐渐适应焦化废水的水质,颗粒污泥的活性又开始恢复。微氧曝气能够明显提高颗粒污泥的产甲烷活性。微氧时污泥的产甲烷活性比厌氧时提高了32.2%,对COD的去除率也由58%提高到了87.4%。关键词:EGSB反应器;焦化废水;驯化;产甲烷活性;微氧中图分类号:X703文献标识码:A文章编号:1000-4602(2010)01-0024-04基金项目:太原市科技发展计划项目(07021003、091008)ChangesinMethanogenicActivityofGranularSludgeAcclimatedbyCokingWastewaterinEGSBReactorDONGChun-juan1,FENGMei-rong2,WANGHai-hui3,CHENSu-yun1,WANGYan-xia1(1.DepartmentofEnvironmentEngineering,TaiyuanUniversity,Taiyuan030009,China;2.ScienceandTechnologyCommunicationCenter,TaiyuanScienceandTechnologyDepartment,Taiyuan030009,China;3.SchoolofChemicalEngineeringandEnvironment,NorthUniversityofChina,Taiyuan030051,China)Abstract:Atambienttemperature(22to27℃),andwiththeinfluentCODconcentrationofa-bout2200mg/L,thegranularsludgeintheexpandedgranularsludgebed(EGSB)reactorwasacclima-tedthroughgraduallyincreasingcokingwastewatersupplementratiostodeterminethefeasibilityofrapidstart-up,efficientandstableoperationoftheEGSBreactorinthetreatmentofactualcokingwastewater.Whentheinfluentistotallycokingwastewater,themicro-aerobictreatmentbegan.Themethanogenicac-tivityofgranularsludgeattheacclimationstageandmicro-aerobicstagewasstudied.Theresultsindicatethatthecokingwastewatercandistinctlyrestrainthegranularsludgeandreduceitsmethanogenicactivity.Butthemethanogenicactivityofthegranularsludgeisnotreallyrestrained.Whenusing100%cokingwastewaterinsteadof0%cokingwastewater,thedecreaseofmethanogenicactivityis75.8%whenusingcokingwastewaterassubstrate,butonly6.23%whenusingcalciumacetateassubstrate.Moreover,the·24·第26卷第1期2010年1月中国给水排水CHINAWATER＆WASTEWATERVol.26No.1Jan.2010inhibitioneff