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1、StudyonthetreatmentofdomesticwastewaterbyanaerobicbaffledreactorAbstract:Theexperimentforthetreatmentofsynthesizeddomesticwastewaterbyanaerobicbaffledreactor(ABR)wasconductedatroomtemperature.ThefindingsindicatedthattheARBreachedthebestremovalrateattemp
2、eratureof25℃andhydraulicretentiontime(HRT)of24h.HRT,watertemperature,organicloadingrateandinfluentconcentrationarethemajorfactorsinfluencingtheremovalrateanddecreasingtheHRTandincreasingtheorganicloadingratecausedthedecreasedchemicaloxygendemand(COD).Ke
3、yword:ABR;anaerobictreatment;domesticwastewater;influencefactorIntroductionHigh-rateanaerobictechnology,havingthemeritsofenergy-saving,lowproductionofactivatedsludge,isatypeofsustainabledevelopmentwastewatertreatmenttechnologyandhasbeenwidelyusedinthetr
4、eatmentofhighconcentrationsoforganicwastewater.ARB,forinstance,hasattractedalotofattentionforitssimplestructure,highremovalrate,quicksetupandstabileoperation.ThebiggestcharacterofARBliesinitsupanddownbaffle,withwhichtheinfluencecantravelinbothrooms,maki
5、ngthebacterialiveindifferentlocationandthegasreleaseeasily.ABRset-upexperimentSet-upstyleForARB,thestart-upstylesareasfollows:highloadingrateandlowloadingrateset-up.Thehighloadingrateistakeninthepresentexperiment.ABRset-upprocessTheset-uptimechoseatmid-
6、Aprilwiththeroomtemperatureofabout18℃andthetemperaturekeepsincreaseanditwasprobetosetup.Theset-upstartedatfourthAprilandendsatfifthJuly,aboutamonthittakes.AcclimationofsludgeAcclimationofsludgestage,operatedatlowloadingrate,isaprocesscultivatedtheneeded
7、sludge.Basedonthepreviousstudies,theacclimationofanaerobicsludgetakesmoretime.TheacclimationstagestartsatAprilandthetemperatureisabout15-23℃andkeepsincreasing,goodforthegrowthofsludge.TheCODconcentrationininfluencestaysaroundat900mg/landPhofsome7.Blacks
8、ludgeisfoundinARBaftera-weekoperationandtheoperationkeepsfortwentydaysuntiltheremovalratestaysrelativelyconstant.ResultsanddiscussionFig.4.1.3CODremovalratewithtimeItcanbeseeninFig.4.1.3thatwhenHRTisbetween8hand36h,CODremovalrate
