Raws li lub caij nyoog muag khoom hauv kev tsim kho dej, Kuv zoo siab heev rau kev kho lub txaj biofilm reactor (MBBR) Technology, yog cov khoom siv pov tseg kom zoo, kev ua haujlwm yooj yim. Hauv tsab xov xwm no, peb yuav delve mus rau vim li cas biofilm qee zaum tsis ua rau ntawm MBRB media, xav ntau yam xws li lub hauv paus kev ua haujlwm thiab yam ua haujlwm rau biofilm tsim.
Lub hauv paus ntsiab lus ntawm MBBR cov txheej txheem
MBBR MBR Media kom cov kab mob me los txuas mus rau saum npoo ntawm cov cab kuj thiab ua ib lub biofilm. Thaum cov dej khib nyiab ntws hla cov chaw nplooj ntoo, organic teeb meem thiab yaj oxygen nyob rau hauv diffuse rau hauv biofilm. Cov kab mob me tsis pub dhau lub biofilm metabolize thiab assimilate cov organic teeb meem nyob rau hauv muaj cov pa oxygen. Lub decomposition cov khoom ces diffuse rov qab rau hauv cov dej theem thiab huab cua, ua rau muaj kuab paug organic nyob hauv cov neeg muaj kuab lom.
Raws li Characklis, liu, thiab lwm tus, kev tsim ntawm cov yeeb yaj kiab microbial, cov cab kuj txuas, thiab tsim biofilm. Tus txheej txheem no tuaj yeem faib ua ob theem loj: microbial adsorption thiab exctreteration loj hlob tuaj.
Qhov cuam tshuam rau Biofilm tsim hauv MBRBR
1. Cov khoom thauj khoom saum cov khoom
Tus nqi sib txawv, roughness, particle loj, thiab concentration ntawm MBRR CRARIER ncaj qha cuam tshuam ncaj qha cuam tshuam thiab tsim. Cov kab mob me me feem ntau muaj qhov tsis zoo ntawm lawv cov chaw nyob hauv qab txoj kev loj hlob. Cov cab kuj ntxig saum npoo ntawm cov kab mob txuas thiab immobilization.
♦ Qhov chaw loj dua ntawm cov cab kuj tau txais thaj chaw sib cuag zoo ntawm cov kab mob thiab cov cab kuj piv rau txoj kev du.
♦ Rothe ntxhib ntawm cov cab kuj, xws li lub qhov thiab tawg, ua raws li cov ntaub thaiv thaiv kom tiv thaiv cov kab mob uas yog cov khoom siv.
Cov Particle Cov Hluav Taws Xob Me Tshaj yog cov yuav tsim cov biofils vim lawv qhov kev sib nrig sib sib leeg tsawg thiab thaj chaw loj. Cov nroj tsuag muaj cov tseem ceeb rau kev tsim biofilm. Wagner pom tias cov cab kuj qis heev, txawm tias muaj cov nqi tshem tawm tuab, tus nqi tshem tawm tsis tuaj yeem ua tiav thaum kho cov refractory wastewater. Txawm li cas los xij, ntawm cov cab kuj concier concentration ntawm 20-30 g / l, tus reactor yuav ua tiav qhov chaw ruaj ntseg txawm tias tsuas yog 20% ntawm cov cab kuj muaj ib tug biofilm.
2. Tshem tawm microbial concentration
Feem ntau, raws li cov concentration ntawm cov kab mob sib cais nce ntxiv, muaj feem tiv thaiv cov kab mob me me thiab cov cab kuj kuj nce ntxiv. Muaj kev xav tseem ceeb ntawm cov kab mob me thaum lub sij hawm cov microbial txuas. Ua ntej tus nqi tseem ceeb no, microbial thauj thiab diffusion los ntawm cov kua theem rau cov cab kuj yog cov txheej txheem tswj. Thaum tus nqi no tau dhau, microbial txuas thiab imbobilization ntawm cov chaw nplooj ntoo muaj txwv los ntawm cov chaw nres nkoj zoo thiab tsis yog nyob ntawm kev teeb meem ntawm cov kab mob sib cais.
3.Txoj kev ntawm cov kab mob me me
Microbial kev ua si, piav qhia los ntawm kev loj hlob tshwj xeeb (μ), yog qhov tseem ceeb thaum kawm thawj theem ntawm biofilm tsim. Tus nqi thiab thawj tus nqi ntawm kev txuas thiab kho cov kab mob nitrify ntawm cov chaw nplooj ntoo muaj sib npaug rau cov kev ua ub no ncua cov kab mob nitrify.
♦ Thaum kev ua haujlwm ntawm roj ntsha ntawm cov kab mob sib cais yog qhov siab, lawv lub peev xwm los zais cov tshuaj polymellular kuj tseem siab dua.
♦ Lub zog ntawm cov kab mob uas muaj cov kab mob sib piv yog nyob ncaj qha rau lawv txoj kev loj hlob.
♦ Cov qauv deg ntawm cov kab mob sib txawv nrog lawv cov haujlwm.
Ass Cov neeg tau sib cuag nrog cov cab kuj muaj micrrobial nrog cov cab kuj, hydt), kua theem phe, thiab hydrodynamic shear zog kuj ua lub luag haujlwm.
Cuam tshuam cov yam ntxwv thaum lub sij hawm MBRR Biofilm tsim txheej txheem
1.Txhua hauv cov txheej txheem biofilm
Cov rog no ncaj qha txhawb rau kev sib cuam tshuam ntawm cov kab mob me thiab cov chaw muaj tsheb thauj khoom hauv cov txheej txheem biofilm.
2. tso tawm ntawm cov cab kuj txawv hydrophilicity
Qhov saum npoo ntawm GPU Carrier muaj cov pab pawg hydrophilic xws li -oh thiab cov pab pawg. Feem ntau cov microorganisms muaj cov kab mob hydrophilicity zoo, thiab cov chaw nqa khoom nto thiab cov kab mob sib luag tuaj yeem tsim cov qauv hydrogen. Lub zog dawb ntawm cov cab hlau hydrophilic cov chaw nres tsheb yog qis dua uas ntawm hydrophobic ib, ua rau nws yooj yim rau kev mus kom ze thiab adsorb mus rau hydrophilic cov cab kuj kev loj hlob.
3.ffect ntawm qhov kub ntawm Biofilm tsim
Qhov ntsuas kub haum rau ntau rau cov kab mob aerobic yog 10 ~ 35 degree. Dej kub cuam tshuam kev kev loj hlob ntawm nitrify cov kab mob thiab nitration. Qhov kev loj hlob zoo tshaj plaws rau feem ntau nitrifififififugified yog 25 ~ 30 degree. Thaum qhov kub nyob hauv qab 25 degree lossis siab dua 30 degree, kev loj hlob ntawm nitrifying bacteria qeeb, thiab qis dua 10 degree, lawv txoj kev loj hlob thiab nitrification yog ho retarded.
Kev ntsuam xyuas nyob rau ntawm 10 degree, 20 degree, thiab 35 degree tau pom thaum muaj 10 hnub, nrog kev pom tseeb tom qab 7 hnub, nrog qhov siab tshaj plaws ntawm 2.1 G / L. Ntawm 35 degree, Biofilm tau pib ua tom qab 4 hnub thiab matured tom qab txog 19 hnub, nrog ib tug lej txuas ntawm biofilm tus nqi ntawm 3.5 g / l. Ntawm 20 degree, Biofilm tau pib tsim tom qab 2 hnub thiab mus txog qhov siab tshaj plaws ntawm biofilm tus nqi ntawm 5.7 g / l tom qab li 10 hnub. Nws yog pom tseeb tias qhov kub muaj qhov cuam tshuam loj ntawm biofilm tsim, nrog kev pib nrawm ntawm {{}} degree.
Qhov kub thiab txias yog qhov cuam tshuam tseem ceeb cuam tshuam rau kev ua haujlwm thiab muaj peev xwm ntawm cov kab mob nitricification feem ntau los ntawm cov qauv kev loj hlob thiab kev ua haujlwm ntawm nitrify. Nws cuam tshuam cov kev coj noj coj ua biochemical thiab cov pa oxygen.
4.Effect ntawm Carrier tshwj xeeb thaj chaw thiab nto rougness ntawm biofilm adhesion kev ua haujlwm
Ib thaj chaw loj ntawm thaj chaw muaj tseeb thiab roughness txhim kho cov cab kuj muaj peev xwm ntes cov microorganisms. Cov neeg nqa khoom muaj cov peev xwm loj los ua kom muaj zog dua los daws teeb meem thiab muab cov tshuaj zoo rau kev sib xyaw thiab kev sib cuag ntawm cov kab mob thiab substrate. Qhov chaw ntxhib muaj cov kab ciam av tuab dua li ib puag ncig zoo nkauj hydrodamic thiab zam qhov kev cuam tshuam zoo li qub ntawm cov dej ntws tawm ntawm kev loj hlob ntawm cov kab mob sib txuas.