a2o工艺污水处理厂毕业设计

Abstract 4 3.2.1格栅 12 英文原文与文献..................................................42摘要五日生化需氧量(BOD5)：140mg/L；悬浮物(SS)：200mg/L；r3BOD5≤20mg/L；SS≤20mg/L；r3根据设计要求和求新的思想，该污水处理工程进水中氮含量均偏高，在去除BOD5A/O工艺由于不同环境条件，不同功能的微生物群落的有机配合，加之厌氧、缺氧条2本设计采用了A/O为主体工艺，工艺流程相对简单，省去了污泥消化系统，节省22Abstract55rft5s2第一章设计概论1.1设计依据和任务:6万m3/d城镇污水推流式曝气池处理工程设计mdSS=200mg/lNH3-N=30mg/lBOD5<20mg/lCOD<60mg/SS<20mg/lNH3-N<15mg/l1)文献获取：充分利用现有文献资源，获取充分的国内外相关文献。2)工艺方案比选：对文献认真阅读后，就课题内容进行酝酿和思考，确定设计方3)工艺及主要构筑物计算：对计算确定各构筑物主要尺寸及工艺流程主要运行参4)设计图纸：详见设计要求。5)设计说明书的编制：包括单元构筑物的设计、附属设备的设计、设备选型与运6)撰写论文：按照毕业论文的要求与规范完成论文。会查阅科技文献资料了解城市污水处理技术的国内外现状、发展趋势。2)对所查阅科技文献资料进行归纳、运用，写出文献综述。3)弄清设计思路，掌握工艺设计的程序并进行该项目的工艺设计，包括：确定工艺流程、设计计算、编制说明书及绘制工程设计图纸等。实际成果及③设计图纸(6~8张)，即：b.污水处理站高程布置图(兼做工艺流程图)1张；4)毕业论文撰写要规范。5)论文期间，同学们要按照学院要求遵守各项规定，听从老师指导。1.2设计目的5参数等。为他们进一步深造和学习打下基础。第二章工艺流程的确定2.1工艺流程的比较5→处理水1)流入工序：废水注入，注满后进行反应，方式有单纯注水，曝气，缓速搅拌三2)曝气反应工序：当污水注满后即开始曝气操作，这是最重要的工序，根据污水3)沉淀工艺：使混合液泥水分离，相当于二沉池，4)排放工序：排除曝气沉淀后产生的上清液，作为处理水排放，一直到最低水位，5)待机工序：工处理水排放后，反应器处于停滞状态等待一个周期。CA/A/O法②在厌氧的好氧交替运行条件下，丝状菌得不到大量增殖，无污泥膨胀之虞，SVI③污泥中含磷浓度高，具有很高的肥效。④运行中勿需投药，两个A段只用轻缓搅拌，以不啬溶解氧浓度，运行费低。QD一体化反应池(一体化氧化沟又称合建式氧化沟)沉池。基本运行方式大体分六个阶段(包括两个过程)。5在85％以上，并且硝化和脱氮作用明显。较技术指经济指标*运行情况法法法法法法法法 去除85~9585~9585~9585~9085~9185~9585~9080~9085~95费负动应水厂水厂用AB法AO90~9590~9985~9590~<100>100<100100<100<100>100>100<100<1002.2约约适应适应适应般适应工艺流程的选择重金属及其他难以生物降解的有毒有害污染物一般不超标；②污水中主要污染物指标为经济。由于将来可能要求出水回用，处理工艺尚应硝化，考虑到NH-N出水浓度排放3要求较低，不必完全脱氮。根据国内外已运行的中、小型污水处理厂的调查，要达到确定的治理目标，可采用“A2/O活性污泥法”。砂砂水分离泥饼脱水间初沉污泥消毒剂进水放第三章工艺流程设计计算3.1设计流量的计算a==aZaZ=smaxZa3.2设备设计计算12(1(1)确定栅前水深B=1maxv1B则h=1=0.82m2LL则进水渠渐宽部分长度L=BB1=1.731.61=0.33m12tana2tan2022m12tan60(8)每日栅渣量103单33H3F40.3集水池长度取10m，则宽度B===4.03mF40.3l10潜水电泵直接置于集水池内，电泵检修采用移动吊架设计流量Q=3275m3/d=0.910m3/d，设计水力停留时间t=40smaxv0.82Z(5)每个沉砂斗得容积(V)0V==0.9m32h'b=3+b=1.65m2tg60o1SSmm13312123设采用重力排砂，池底坡度i＝6％，坡向砂斗，则33232123Q36000.9103600A=max==1638m3q22(3)沉淀部分有效容积V'(7)校核长宽比L21.62>4b5(符合要求)0Z(9)每格池污泥所需容积V'422122242(12)污泥斗和梯形部分容积12123444、设计计算，采用A2/O生物除磷工艺55(4)混合液悬浮固体浓度V====20000V====20000(6)反应池总水力停留时间t==24=8.0hQ60000(7)各段水力停留时间和容积thVm3厌厌缺缺thVm好好V10000单组有效面积S=单==2000m3单h5.0S2000单组反应池长度L=单==53.3mB57.5L/bL/b==7.1(满足L/b=5~10)(9)反应池进、出水系统计算单组反应池进水管设计流量Q=Q=0.347m3/d124A40.44管径d===0.75m3.14校核管道流速v=Q=0.347=0.7m/s2回流污泥渠道。单组反应池回流污泥渠道设计流量QRR2d222AQmv0.6333内2H=()2=0.2143孔口过水断面积A===v0.653管道过水断面积A=Q5=0.694=0.87m2v0.8管径d===1.05m管径d===1.05m校核管道流速v=Q5=0.694=0.7m/sA(1.1)2几2333R。eVr3RmaxR。ORs(20)=AORORs(20)=sm(T)LkgOdkgOh相应的2最大标准需氧量OR=1.4OR=815.71.4=1142.0kg/hmaxsA最大时的供气量G=1.4G=1.413595=19033m3/hsmaxs需空气压力p34h+h=0.2m——供凤管到沿程与局部阻力之和34n=maxn=max=＝4079(个)csv vQ＝maxS单326s管径d=S取支管管径为DN400mmS双S单管径d=7格厌R单泵流量Q=Q=2500=1250m/R单2R23(12)混合液回流设备(1)混合液回流比内R内R单2246内2管道过水断面积A=管道过水断面积A=6==0.694m2d===3.14s14d6管道过水断面积A=Q7=0.694=0.58m2v1.24A40.58管径d===0.86m3.14、进出水配水更均匀、存排泥更方便，常采用圆形辐流式Q0.6943600A===842.8m2N•q21.5A8D===32.57m1rh二沉池污泥区所需存泥容积VwT(1+R)QX4225002700V=w==666.7m2wX+X2700+5400r采用机械刮吸泥机连续排泥，设泥斗的高度H为0.5m。2(4)二沉池缓冲区高度H=0.5m，超高为H=0.3m，沉淀池坡度落差H=0.63m345m234D2.6二沉池直径与水深比为==8.7(介于612之间D2.6H3.75单22单22v=0.61m/s进水竖井采用D=1.5m，流速为0.1~0.2m/s2出水口尺寸0.5×1.5m²,共6个，沿井壁均匀分布。vvmsssA23.1m24A423.1稳流筒直径D=D2+=1.52+=5.63m323.14单池设计流量Q=Q=0.694=0.347m3/s单2222起终21三角堰中心距(单侧进水)nn2121(4)排泥部分设计nn2121(4)排泥部分设计总污泥量为回流污泥量加剩余污泥量RS总RS设计泥量为q=Q单=638.1m3/d=0.177m3/d212表面积A=表面积A===312.3m2h2L30长宽比==L30b3.5设计最大加氯量为物的计算二沉池活性污泥由吸泥管吸入，由池中心落泥管及排泥管排入池外套筒RR(2)剩余污泥泵房二沉池产生的剩余活性污泥及其它处理构筑物排出污泥由地下管道自流入集泥井，剩余污泥泵(地下式)将其提升至污泥浓缩池中。w缩后含水率97%2.浓缩池的尺寸M304A4512直径：D===25.5m3.14高度：工作高度h=TQw=182560=3.75m2323ww3设贮泥时间为4h，则贮泥池的容积V==Q=6.4m3/d27，选择DY15型带式压滤脱水机3.3构建筑物和设备一览表123456房L×B=L×B×H=L×B×H=L×B×H=数量设计参数d隙d=20.0mm22螺旋压榨机(Φ300)1台螺纹输送机(Φ300)1台钢闸门(2.0X1.7m)4扇手动启闭机(5t)4台螺旋泵(Φ1500mm,N60kw)5钢闸门(2.0mX2.0m)5扇手动启闭机(5t)5台手动单梁悬挂式起重机(2t，砂水分离器(Φ0.5m)2台罗茨鼓风机(TSO-150，L×B×H=7注水泵(Q3~6m3/h)2台9L×B=剩泵房(合L×B=套筒阀DN800mm,Φ1500mm2个电动启闭机(1.0t)2台手动启闭机(5.0t)2台无堵塞潜水式剩余污泥泵3台第四章平面布置4.1污水处理厂平面布置项目总规模控制，并作出分期建设的安排，合理确定近期规模，近期工程投入运行一年内水量宜达到近期设计规模的60％。2、污水厂的总体布置应根据厂内各建筑物和构筑物的功能和流程要求，结合厂址3、污水厂厂区内各建筑物造型应简洁美观，节省材料，选材适当，并应使建筑物和构筑物群体的效果与周围环境协调。4、生产管理建筑物和生活设施宜集中布置，其位置和朝向应力求合理，并应与处持一定距离。5、污水和污泥的处理构筑物宜根据情况尽可能分别集中布置。处理构筑物的间距装7、厂区消防的设计和消化池、贮气罐、污泥气压缩机房、污泥气发电机房、污泥8、污水厂内可根据需要，在适当地点设置堆放材料、备件、燃料和废渣等物料及9、污水厂应设置通向各构筑物和附属建筑物的必要通道，通道的设计应符合下列2)车行道的转弯半径宜为6.0~10.0m；3)人行道的宽度宜为1.5~2.0m；5)天桥宽度不宜小于1.0m；6)车道、通道的布置应符合国家现行有关防火规范要求，并应符合当地有关部门。2、构(建)筑物平面布置1)污水处理区，由各项污水处理设施组成，呈直线型布置。包括：污水总泵站、2)污泥处理区，位于厂区主导风向的下风向，由污泥处理构筑物组成，呈直线型，该区是将办公室、宿舍、食堂、锅炉房、浴房等建筑物组合的一个区，1)污水厂工艺管道2)污泥工艺管道3)厂区排水管道溢6)厂区该水管道和消火栓布置1)主厂道路布置厂区内各主要构(建)筑物布置车行道，道宽4.0m呈环状布置。3)步行道布置5、计算水头损失时，一般应以近期最大流量作为构筑物和管渠的设计流量；计算6、设置终点泵站的污水厂，水力计算常以接受处理后污水水体的最高水位作为起8、协调好高程布置与平面布置的关系，做到既减少占地，又有利于污水、污泥输资和运行成本。H=h+h+h31h—局部水头损失2h—构筑物水头损失3h=ili—坡度i=0.0051211h=h×50%=0.10m213Hhhh+0.10+0.45=0.75m2123沉淀池相对地面标高1h=h×50%=0.15m2133123A2/O反应池池相对地面标高hil=0.005×10=0.05m1h=h×50%=0.025213H=h+h+h=0.05+0.025+0.30=0.375m4123平流式沉砂池相对地面标高1h=h×50%=0.15m213Hhhh+0.15+0.30=0.75m5123细格栅相对地面标高h=il=0.005×8=0.04m1h=h×50%=0.02m213Hhhh0=0.44m6123污水提升泵相对地面标高 (2)详细计算过程在污水处理工程中，为简化计算一般认为水流是均匀流。管渠水头损失主要=fh——为沿程水头损失，m；f2g2gL=iL(1)、构筑物水头损失。水头损失(水头损失(m)水头损失(m)二沉池至接触池有一个突然扩大和突然缩小及两个90弯头，局部阻力系数为：好氧池至集配水井有一个突然扩大、一个90弯头和一个突然缩小，局部阻力系数缺氧池至厌氧池有两个突然扩大和突然缩小，局部阻力系数取为沿程局部合计0.300.1380.307750.060.1140.176I(‰)v(ms)2.050.9(Ls)220.180.37460.010.15270.100.26800.040.30700.100.18380.010.2294622式中C——污泥浓度系数；HHH(Ls)面标高(m)(m)标高(m)标高(m)12345第五章供电仪表与供热系统设计(1)污水和污泥两部分分别集中设置显示记录仪，污水部分设置单独的仪表(3)仪表自动控制设计，要掌握适当的设计标准，在工程实效的前提下，考虑技术(1)污水泵房：集水池液位应集中显示，并设上下限报警；指示记录，PH值指示记录；(3)沉砂池：水温指示记录，PH；(8)污泥脱水机房：污泥流量指示记录，加药量指示记录。第六章劳动定员第七章参考文献[7]张智.给水排水工程毕业设计(论文)指南.北京：水利水电出版社，20007谢英文原文与文献Summary:ThistextexpatiatedprimarilytheCarrouseloxidizestheconstruction,craftmechanismoftheditchandcirculatetheproblemexsitedintheprocesswiththehomologousthemethodofsolution.Finally,introducetheCarrouseloxidizethelatestresearchdirection.Keyphrase:TheCarrouseloxidizestheditchdividedsbythephosphortakesoffthenitrogenconstructionmechanismApplicationandDevelopmentofCarrouselOxidationDitchinrunningandtheircorrespondingresolventarealsopointed.AtheKeywords:Carrousel;oxidationditch;nitrogenandphosphorOxidizetheditch(oxidationditch)againacontinuouscirculationakindoftotransform.Oxidizingthedirtywaterinditchhandlesthewaterfluidmattergood,circulatethestabilityandmanageconvenienceetc.techniquecharacteristics,alreadyatdomesticandinternationalandextensiveapplicationinlivethedirtywatertoisCurrentapplicationthanoxidizeextensivelytheditchtypeinclude:The(Pasveer)oxidizestheditch,the(Carrousel)oxidizestheditch,(Orbal)oxidizestheditch,thetypeofToxidizesthetheditchbecauseofthedifferenceofesseinconstructionwithcirculating,thereforeeachcharacteristics[2].Thistextwillintroduceconstruction,mechanism,existentproblemanditslatestseloxidizeditchesprimarilyTheCarrouseloxidizetheditchtoberesearchedtomanufacturebyDutchDHVcompanydevelopmentin1967.OxidizethelastthethelivingcreatureofthehigherrequesttakesoffthenitrogenwithFromdiagramtherefore,theCarrouseloxidizestheditchtheusagethespiritofthatdefinitedirectioncontrolwithshakeupthedevice,facetomixwiththeliquiddeliverthelevelspeed,frombutmakedrivetheliquidofadmixturethatshakeupisinoxidizeditchshutmatchoutletcirculateflow.Thereforeoxidizetheditchhavethespecialhydraulicsflowsthe,currentcompletemixwiththetheflowtypereactoragain,theditchinsideexsitsobviouslyofdeliquescenceoxygendensitystepsdegree.Oxidizingtheditchcrosssectionisrectangleortrapezoids,theflatsurfaceshapeismanyforoval,theditchinternalwaterisdeepgeneralfor2.5~4.5m,the7msof,ditchinsideaveragespeedinwatercurrentis0.3ms/s.Oxidizeditchspiritadmixtureequipmentscontainsurfacespiritoftypespiritmachineetc.,matchwithinrecentyearsusagestill3.1TheCarrouseloxidizestheditchhandlesdirtyandaqueousprincipleTheatthebeginningditchdirectwithdirtymireinrefluxtogetherenteroxidizetheditchsystem.ThesurfacespiritmachinemakesfuseintheliquidofsmgetstheenoughdeliquescenceoxygencomesandgotodividedbytheBOD;Atthesametime,theammoniatheliquidbeplacedintheoxygenappearance.Inthespiritmachinedownstream,afterwatercurrentbebecomebytheswiftflowappearanceofthespiritDistrictofevenflowtheappearance,thewatercurrentmaintainsintheminimumcurrentvelocity,guaranteeingtheliveanddirtymirebeplacedinthefloatstheofDOdeclinesforzero,mixingwiththeliquidreporttheanoxiaappearance.Versanitricthatturnthefunctionthroughanoxiaarea,mixwiththeliquidentertohavetheoxygenarea,completingoncecirculating.Thatsysteminside,theBODdeclinesthesolutionisasanitricthefunctiontakeplaceinsamepond.Becauseofstructuralrestrict,thiskindofoxidizetheditchalthoughcanthenvalidForthesakeoftheacquisitionbetterdividedbythephosphorustakeoffthenitrogenousresult,Carrousel2000systemsincreasedaarea)ThedirtymireinallrefluxesenterstheanaerobicDistrictwithtermcompleteremainingofdirtymireinrefluxinsidenitricacidhereafteruniqueoxygenterm.Atthesametime,anaerobicDistrictthegermacquiretheVFAitsassimilationPHB,theenergysourceneededsolvesinthephosphoricwaterandcausephosphatictheuniqueoxygenareathathavethemixer,theso-calleduniqueoxygenisapondinsidetomixwithliquidsincehavenothenumeratoroxygen,alsohavenothecompoundoxygen(nitricacidroot),thehereuniqueoxygenenvironmentisnext,70-90%dirtywatercanprovidetheenoughwiththeliquidtransferthedirtymireinsideinoxidizeditchenrichoxygenareaeject,whileenrichingtheoxygenenvironmentgermephosphorusSynthesizingandDirtywaterintheriverCity,longsandCitydecontaminationcenter[softhedirtythefactoryofwaterinthefirstinKunmingofadoptionthatcraftshandlesthemovementresultofthefactorytherefore:ThroughCarrousel2000systemafterhandling,theBOD,ratetoalsocometoa90%.3.2TheCarrouseloxidizestheditchdividedsbythephosphorusnitrogenousinfluencefactorAffectingtheCarrouseloxidizestheditchdividedsbythesnotreachthebiggestdividedingbytheresultofphosphorusonthethedirtymire(forexample20ds,25ds,30ds)istohavenonecessary,properchoosetousewithinthescopeof8~15d.AttheAffectingtheCarrouseloxidizestheditchtakesoffthedensities.Theresearchexpresses,oxidizingtheditchinsideexsitsdeliquescenceoxygendensitystepsdegreenamelythegoodoxygencsturnthereaction.Atthesametime,amplecarbonsourceandhigher4.TheCarrouseloxidizesproblemandsolutionmethodsoftheditchesse.ThoughtheCarrouseloxidizestheditchhasawaterfluidmattergood,theanti-poundsattheburthenabilitystrong,dividedbythephosphorustakeoffthenitrogenefficiency.But,inphysicallyofmovementprocess,stillexsitsaseriesofproblem.DirtymireinflationproblemWhendiscardtheaquaticcarbohydratemore,theN,Pcontainsrenotetc.causeseasilydirtymireingerminforminsilkinflation;Notislowerbutthedirtymirecarrieshigherhour.Themicrobialburthenishigh,thegermsabsorbedthelargequantitynourishmentslower,accumulatingtheriseslargequantityishightogluesexualandmanysugarmaterials,makingthesurfaceoftheliveanddirtymireadheretothewatertoincreaseconsumedly,SVIthevalueisveryhigh,becomingthedirtymireinflation.ntraturehighresultinof,canenlargementtoleranceorlowerintothewatermeasurestoalleviateburthen,ortheadequacylowerstheMLSS(controldirtymirerefluxmeasure),makingneedtheoxygenStoadjusttheburthen,necessitythehourcanstopintothewater,stuffyaperiodoftime;Canpassthehurladdthenitrogenfertilizer,phosphorusfatty,adjusttheadmixturenourishmentintheliquidrepressthesilkformgermbreed,controlingthedirtymireintheoxygenagitation,creationlargequantityfoam;Themireiskerosene,theoilofsilicon,throwdealas0.5~1.5mgs/L.Passtopondinspiritinthewastewatermore,separatewiththefoameasilyandinenhancemostimportantlytheheadwatersmanage,reducingtontaintheoiloverthehighwastewaterandotherpoisonouswasteWhencontaininthewastewatertheoilmeasuresbig,wholesystemmirequalitybecomelight,can'tliketocontrolverymuchinoperateprocessitsattwosinkthepondstopovertime,resultingintheanoxiaeasily,producingthecorruptanddirtymireascendtonitricturnthefunction,makingnitratedensityhigh,attwosinktheversanitricineasyoccurrenceinpondturnthefunction,creationwater,brokeoffordirtymireinclearance,judgetheclearreason,adjusttheoperationThedirtymiresinkstodeclinethesexbad,canthrowtoaddofoagulateorslothmaterials,theimprovementwatermeasuresortheenlargementrefluxmeasures;Suchastherowthemiremeasures;Ifdiscoverthedirtymireiscorrupt,shouldenlargementtolerance,theclearanceaccumulatesthemire,andtry4.4Currentvelocityisnotallandthedirtymiresinkstocurrentvelocityfor,doingnottakeplacesinkingaccumulatingtoturntobrushforthespiritoftoturnthedishwiththespiritof,only1/7,thereforeresultintooxidizetheditchupperpartcurrentvelocitybigger(roughly0.8~1.2ms,evenlarger),butthebottombelow,mixwiththeliquidhasnocurrentvelocityalmost),causingditchbottomlargequantityaccumulatethemire(sometimesAddingthetop,downstreamleadstoflowtheplankisavalidmethodthatameliorativecurrentvelocitydistribute,increasestheoxygenabilitywiththemostconvenientmeasure.Theupperstreamleadstoflowtheplankinstallsatbeapartfromtoturnthe4.0highdegreeasthedeep1/5~inwater1/6,combinetheperpendicularityinstallinthesurface;Thedownstreamleadstoflowsflowknotholematerialcanusemetalsorglasssteelsbutregardglasssteelasgood.Leadtoflowtheplankcompareswithotherameliorativemeasurecantnotonlyincreasethemotiveconsumeswithrevolvescost,butalsocanstillthansignificantlyexaltationoxygenabilitywiththeoriesmotiveefficiency[13].Moreover,passinthespiritonboardswimtoestablishtheunderwaterpushmachinecanalsoturntothespiritoftheliquidofthatlowanddirtymireincurrentvelocityinbottominditchsinkaccumulates.Establishtheunderwaterpushmachineusedsforthatoxidizetheditchmuchmorevivid,thisforeconomyenergy,liftg5.ConclusionTheCarrouseloxidizestheditchbecauseofhavingthegoodaabilitywithcirculatetomanagetheconvenienceetctheadvantage,havinggottheextensiveapplication.Butbecauseoftechnologicaldevelopmentwithsocialadvance,thatcraftisnecessarilywillexaltationgettingfurther.Theauthorthinks:TheCarrouseloxidizesthefutureresearchdirectionoftheditchwillnowofmainbelowseveralaspects.1Combinationlivingcreaturemethod,researchwithdevelopuresfrombutincreasestheorganismcarries,butalsolivingcreatureactivityininsideinditch.ForexamplethrowtoaddtheEMinoxidizeditchwithsinglemindthegermgrow,throwsinthatthesaltofironregimentandincreasestobearthetoxicitypoundatetc..machine,underwaterpropeller,reducetomaintainthecontrolthetechniqueandchangesthetechniqueofisfromnowontoxicitycan,reducetocovertheareatobuildthepricewiththeengineering.Theoreticalapplication,deeppondinwaterpowertermwiththeresearchofthecraftfunctionistolowerstheengineeringbuildsthepriceandincreasesresistanttocoldbearthetoxicitycanwaittoprovidethepossibledirection.氧化沟工艺在污水处理中的应用与发展ApplicationandDevelopmentofCarrouselOxidationDitchProcessonWastewaterTreatmentAbstract:Thestructureandthetechniquesofcarrouseloxidationditchprocessonnitrogenandphosphorremovalareintroducedinthispaper.Theproblemsinrunningandtheircorrespondingresolventarealsopointed.Atlast,Theauthorshowedtheuptodateresearchimprovementandthemainlyfutureresearchdirection.Keywords:Carrousel;oxidationditch;nitrogenandphosphorremoval;structure；techniques氧化沟(oxidationditch)又名连续循环曝气池(Continuousloopreactor)，是活成功的。自从1954年在荷兰的首次投入使用以来。由于其出水水质好、运行稳定、管理方便等技术特点，已经在国内外广泛的应用于生活污水和工业污水的治理[1]。目前应用较为广泛的氧化沟类型包括：帕斯韦尔(Pasveer)氧化沟、卡鲁塞尔(Carrousel)氧化沟、奥尔伯(Orbal)氧化沟、T型氧化沟(三沟式氧化沟)、DE型氧化沟和一体化氧化沟。这些氧化沟由于在结构和运行上存在差异，因此各具特点[2]。本文将主要介arrouselDHV的专利特许公司EIMCO又发明了Carrousel2000系统(见图1)，l从而使被搅动的混合液在氧化沟闭合渠道内循环流动。因此氧化沟具有特殊的水力学流态，。氧化沟断面为矩形或梯形，平面形状多为椭圆形，沟内水深一般为2.5~4.5m，宽深比为2:水下推动器