水力停留时间对厌氧折流式反应器处理印染废水运行效果影响的研究
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2020-04-17 12:30:51
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环境污染与防治第32卷第4期2010年4月水力停留时问对厌氧折流式反应器处理印染废水运行效果影响的研究*喻学敏。许明。周军李小进。吴海锁李爱民#(1.南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏南京210093;2.江苏省环境科学研究院,江苏南京210036;3.南京理工大学化工学院,江苏南京210094)摘要采用厌氧折流式反应器(ABR)处理印染废水。结果表明,在水力停留时间(HRT)为14~32h时,ABR各格室出水COD逐渐降低,HRT越长,COD去除率越高;进水色度为300~500倍,ABR对色度去除效果显著,在HRT为32h时,色度去除率高达75.0;ABR各格室出水NHa—N均比进水高,第1格室的NH3一N较进水增幅最大;ABR各格室pH呈上升趋势;氧化还原电位(ORP)随ABR格室依次下降;在HRT为14~32h时,BOD5/COD由进水的0.23分别提高到出水的0.31、0.36、0.42、0.4O。从运行管理的经济性和提高出水的可生化性考虑,处理印染废水的HRT选择24h为佳。关键词厌氧折流式反应器印染废水水力停留时间EffectofHRTonperformanceofanaerobicbaffledreactorforprintinganddyeingwastewaterYuXuemin,XuMing,ZhouJun,LiXiaojin。,WuHaisuo,LiAimin.(1.StateKeyLaboratoryofPollutantControlandRe~sourcesReuse,SchooloftheEnvironment,NanjingUniversity,NanjingJiangsu210093;2.JiangsuProvincialA~cademyofEnvironmentalScience,NanjingJiangsu210036;3.SchoolofChemicalEngineering,NanjingUniversi~tyofScienceandTechnology,NanjingJiangsu210094)Abstract:Ananaerobicbaffledreactor(ABR)wasemployedforthetreatmentofprintinganddyeingwastewater,andtheeffectofhydraulicretentiontime(HRT)onthetreatmentperformancewasinvestigated.TheresultsshowedthatCODdecreasedgraduallyinthe5compartmentsofABR,andtheCODremovalefficiencyin—creasedwithincreasingtheHRT.ABRpresentedperfectperformanceonchromaremoval,undertheHRTof14h,18h,24hand32h,thecorrelatedchromaremovalratewas50.5,60.9,68.8and75.0respectively.Am—monianitrogenineffluentofeachcompartmentwashigherthanthatininfluent,andthehighestincreasewasfoundinthefirstcompartment.ThepHofwastewaterincreasedduringthetreatmentprocess,whiletheORPinABRpresen—teddifferenttendency.Thebiodegradab.1ityofthetreatedprintinganddyeingwastewaterwaslargelyraised,forthesignificantincreaseofBOD5/CODvalueofwastewater.Consideringthemanagementeconomicandtreatmentefficien-cy,thisstudyrecommended24hassuitableHRT.Keywords:anaerobicbaffledreactor;printinganddyeingwastewater;hydraulicretentiontime厌氧折流式反应器(ABR)是20世纪8O年代中期由BACHMANN等]从厌氧生物转盘工艺发展而来的一种新型高效厌氧反应器,其结构简单、污泥截留能力强、水力流态良好、稳定性高,适用于中、低浓度有机废水的处理_2_4l。近年来,关于ABR处理废水的报道越来越多,实践表明,ABR能够
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