Vim li cas koj lub MBBR Media tsis tuaj yeem Biofilm hauv ob lub lis piam thiab yuav ua li cas kom peb Biomedia sai Biofilm?

Vim li cas koj MBBR Media tsis tuaj yeem Biofilm hauv ob lub lis piam

thiab Yuav Ua Li Cas Peb Biomedia Ceev Biofilm?

Los ntawm: Cody Aquasust

Hnub Kawg Ua Ntawv Thov: Plaub Hlis 29, 2022

Post tag:

MBBR lossis MBBR Technology yog dab tsi? MBBR yog ib txoj hauv kev zoo rau kev kho cov dej khib nyiab nrog cov sludge tsawg thiab kev ua haujlwm yooj yim thiab kev tswj xyuas. Kab lus no feem ntau qhia txog vim li cas Biomedia fsometimes tsis tuaj yeem Biofilm los ntawm ntau yam xws li lub hauv paus ntsiab lus ntawm MBBR system thiab cov kev cuam tshuam ntawm kev tsim.

MBBR Media yog ua kom cov kab mob txuas mus rau qhov chaw ntawm MBBR cov cab kuj thiab tsim ib lub biofilm. Thaum cov dej khib nyiab ntws los ntawm qhov chaw nqa khoom, cov organic teeb meem thiab cov pa oxygen yaj hauv cov dej khib nyiab diffuse mus rau sab hauv ntawm biofilm. Cov microorganisms nyob rau hauv daim nyias nyias nqa tawm decomposition metabolism thiab organism anabolism ntawm cov organic teeb meem nyob rau hauv lub xub ntiag ntawm oxygen, thaum lub decomposition metabolites diffuse los ntawm biofilm mus rau aqueous theem thiab huab cua, yog li degrading cov organic teeb meem nyob rau hauv cov dej khib nyiab.

Kab lus piav qhia

● Cov txheej txheem ntawm MBBR (cov txheej txheem dai)

● Cov xwm txheej cuam tshuam rau MBBR biofilmed

1. MBBR Bio Carrier nto khoom

2. Suspended microbial concentration

3. Kev ua haujlwm ntawm cov kab mob uas raug tshem tawm

● Muaj feem cuam tshuam rau hauv cov txheej txheem ntawm MBBR biofilmed

1. Kev quab yuam hauv cov txheej txheem ntawm bio-carrier zaj duab xis dai

2. Cov nyhuv ntawm cov cab kuj nto hydrophilicity

3. Qhov kub thiab txias ntawm cov yeeb yaj kiab dai tus cwj pwm

4. Cov nyhuv ntawm MBBR cov neeg nqa khoom tshwj xeeb thaj chaw thiab qhov chaw roughness ntawm biofilm adhesion kev ua tau zoo.

Nyob rau hauv MBBR media, organic pollutants, yaj oxygen thiab ntau yam tseem ceeb cov as-ham yuav tsum ua ntej diffuse los ntawm cov kua theem mus rau saum npoo ntawm biofilm, thiab ces mus rau sab hauv ntawm lub biofilm, thiab tsuas yog cov pa phem diffused rau saum npoo los yog nyob rau hauv lub biofilm. tau decomposed thiab hloov los ntawm cov kab mob nyob rau hauv lub biofilm, thiab thaum kawg tsim ntau yam metabolites. Tsis tas li ntawd, hauv MBBR cov xov xwm, cov kab mob kis tau immobilized ntawm cov cab kuj, yog li ua tiav qhov kev sib cais ntawm SRT thiab HRT (lub sijhawm hydraulic retention), uas ua rau kev loj hlob thiab kev loj hlob ntawm cov kab mob nrog qeeb proliferation. Yog li, MBBR media yog qhov ruaj khov thiab muaj ntau hom kab mob microbial.

 

◆ Aquasust MBBR Process Flow Diagram

Lub hauv paus ntsiab lus ntawm MBBR txheej txheem (duab Membrance txheej txheem)

Raws li Characklis, Liu et al. Kev tsim ntawm microbial zaj duab xis feem ntau mus txog plaub theem:MBBR carrier nto hloov kho,reversible txuas, irreversible txuas, thiab biofilm tsim.

Cov lus piav qhia tshwj xeeb yog raws li hauv qab no: microbial zaj duab xis dai ntawm MBBR cov cab kuj tuaj yeem muab faib ua ob theem:microbial adsorptionthiabsequestration kev loj hlob.

Tom qab tus cab kuj ntxiv rau lub cev dej,ua ntejnkag mus rau lub sijhawm adsorption. Qee cov kab mob thiab cov ntaub ntawv filamentous tau txuas mus rau saum npoo ntawm cov cab kuj, thiab qhov chaw uas muaj cov ntaub ntawv ntau ntxiv yog feem ntau yog qhov concave ntawm cov cab kuj, uas tsis yooj yim sheared los ntawm cov dej ntws.Lub sijhawm no, cov kab mob nyob rau hauv ncua kev loj hlob nyob rau hauv loj qhov ntau thiab ib tug ntau pom tseeb sludge txheej tshwm.

Tom qab qhov kev sib txuas tsis tuaj yeem rov qab tau, cov kab mob tau txais ib puag ncig kev loj hlob zoo nyob rau saum npoo ntawm cov cab kuj, thiab cov kab mob hauv cov sludge adsorbed ntawm cov cab kuj sai sai pib loj hlob nyob rau hauv cov xwm txheej ntawm txaus oxygen mov thiab substrate.

Nrog rau kev loj hlob ntawm kab lis kev cai domestication lub sij hawm, lub biofilm loj hlob nyob rau saum npoo ntawm cov cab kuj loj hlob sai heev, maj mam npog tag nrho cov cab kuj nto thiab pib thicken. Txawm li cas los xij, txoj kev loj hlob ntawm biofilm tsis zoo ib yam, nyob rau hauv qhov tseem ceeb ntawm cov cab kuj, biofilm yog thinner, thaum lub concave qhov chaw loj hlob heev colony, uas qhia tau hais tias lub hydrodynamic shear muaj ib qho tseem ceeb ntawm kev loj hlob ntawm biofilm. Raws li ntau thiab ntau biofilms txuas nrog rau cov nqa khoom, qhov pom tseeb ntawm cov cab kuj maj mam txo qis thiab ua kom sib zog thiab yooj yim dua rau cov kua dej, thaum cov khoom thauj hauv thaj tsam poob qis qis dua.

 

MBBR Media Biofilm tom qab 14 hnub hauv Aeration Tank

Cov xwm txheej cuam tshuam rau MBBR biofilmed

Nws hais txogqhov xwm ntawm tus cab kuj nto(carrier nto hydrophilicity, tus nqi nto, tshuaj lom neeg muaj pes tsawg leeg thiab nto roughness),qhov xwm ntawm microorganisms(cov kab mob kab mob, kab lis kev cai, kev ua ub no thiab concentration) thiabib puag ncig yam(pH, lub zog ionic, hydraulic shear, kub, cov khoom noj khoom haus thiab lub sijhawm sib cuag ntawm cov kab mob thiab cov cab kuj).

1. MBBR Carrier surface properties

Tus cab kuj nto tsub cov cuab yeej, roughness, particle loj thiab carrier concentration ncaj qha cuam tshuam qhov txuas thiab tsim ntawm biofilm ntawm nws nto. Nyob rau hauv ib puag ncig kev loj hlob, cov kab mob microorganisms muaj qhov tsis zoo rau lawv qhov chaw. Qhov roughness ntawm cov cab kuj ua kom yooj yim rau kev txuas thiab immobilization ntawm cov kab mob ntawm nws qhov chaw.

① Qhov chaw saum npoo ntawm cov cab kuj nce qhov chaw sib cuag zoo ntawm cov kab mob thiab cov cab kuj piv rau qhov chaw du.

② Rough qhov chaw ntawm cov cab kuj nto, xws li qhov thiab cov kab nrib pleb, ua raws li cov ntaub thaiv npog los tiv thaiv cov kab mob adhered los ntawm hydraulic shear rog.

Nws tau txiav txim siab tias cov khoom me me me me yog yooj yim dua los tsim cov khoom siv biofilms vim tias lawv qhov kev sib txhuam tsis tshua muaj kev sib txhuam thiab qhov loj ntawm thaj chaw tshwj xeeb piv rau cov khoom loj me me. Tsis tas li ntawd, cov cab kuj tseem ceeb heev rau MBBR biofilmed.

Wagner pom tias nyob rau ntawm cov cab kuj tsawg heev, txawm tias biofilm tuab ntawm 295 μm, qhov kev tshem tawm ruaj khov tsis tuaj yeem ua tiav thaum kho cov dej khib nyiab refractory nrog lub tshuab nqa huab cua. Txawm li cas los xij, ntawm cov neeg nqa khoom siab ntawm 20-30 g / L, txawm tias tsuas yog 20% ​​ntawm cov neeg nqa khoom muaj 75 μn tuab biofilms, lub reactor tseem tuaj yeem ua tiav qhov ruaj khov (98%) tshem tawm tus nqi nrog COD load. mus txog 58 kg/(m{7}}d).

 

2. Suspended Microbial Concentration

Feem ntau, raws li qhov concentration ntawm cov kab mob raug tshem tawm nce, lub caij nyoog ntawm kev sib cuag ntawm cov kab mob thiab cov cab kuj nce. Cov txiaj ntsig ntawm ntau qhov kev tshawb fawb tau pom tias muaj qhov tseem ceeb ntawm kev tshem tawm cov kab mob thaum lub sij hawm txuas cov kab mob microbial; Raws li cov microbial concentration nce, microbial thauj los ntawm txoj kev concentration gradients yog txhim kho.

Ua ntej tus nqi tseem ceeb, kev thauj mus los ntawm microbial thiab diffusion los ntawm cov kua theem mus rau qhov chaw nqa khoom yog cov kauj ruam tswj; Thaum tus nqi tseem ceeb no dhau lawm, kev txuas microbial thiab immobilization ntawm cov cab kuj raug txwv los ntawm thaj chaw zoo ntawm cov cab kuj thiab tsis nyob ntawm qhov concentration ntawm cov kab mob uas raug tshem tawm lawm. Txawm li cas los xij, tom qab qhov sib npaug ntawm kev sib txuas thiab immobilization, tus nqi ntawm cov kab mob ntawm cov kab mob hauv lub cev yog txiav txim siab los ntawm cov kab mob thiab cov kab mob ntawm lub cev.

3. Kev ua haujlwm ntawm cov kab mob uas raug tshem tawm

Kev ua haujlwm ntawm cov kab mob microbial feem ntau yog piav qhia los ntawm qhov tshwj xeeb kev loj hlob (μ) ntawm cov kab mob, piv txwv li, tus nqi ntawm kev loj hlob thiab kev loj hlob ntawm cov kab mob hauv ib chav tsev loj. Yog li ntawd, thaum kawm txog cov nyhuv ntawm microbial kev ua ub no nyob rau hauv thawj theem ntawm biofilm tsim, nws yog ib qho tseem ceeb los tswj cov kev loj hlob ntawm cov kab mob uas raug tshem tawm.Cov txiaj ntsig ntawm kev tshawb fawb txog kev tsim cov heterotrophic biofilms los ntawm Bryers li al. qhia tau hais tias tus nqi thiab thawj tus nqi ntawm kev txuas thiab kho cov kab mob nitrifying rau saum npoo ntawm cov cab kuj yog proportional rau cov kev ua ntawm cov kab mob tshem tawm nitrifying.

① Thaum cov tshuaj lom neeg ntawm cov kab mob tshem tawm tau siab, lawv lub peev xwm los zais cov kab mob polymorphs ntau dua.

② Lub zog theem ntawm cov kab mob muaj sia nyob yog cuam tshuam ncaj qha rau lawv qhov kev loj hlob.

③ Cov qauv saum npoo ntawm cov kab mob sib txawv raws li lawv cov haujlwm.

④ Microbial tiv tauj lub sijhawm nrog tus cab kuj.

⑤ Hydraulic tuav lub sij hawm (HRT).

⑥ Ua kua theem pH.

⑦ Hydrodynamic shear quab yuam.

Kev cuam tshuam rau cov txheej txheem ntawm MBBR biofilmed

1. Kev quab yuam hauv MBBR Biofilmed txheej txheem

Nws ncaj qha ua rau muaj kev cuam tshuam ncaj qha ntawm cov kab mob thiab cov kab mob ntawm cov kab mob, thiab ua lub luag haujlwm tseem ceeb hauv tag nrho cov txheej txheem MBBR biofilmed.

2. Cov nyhuv ntawm cov cab kuj nto hydrophilicity

Qhov saum npoo ntawm GPUC cab kuj muaj cov pab pawg hydrophilic xws li -OH thiab amide pawg, thiab feem ntau cov kab mob lawv tus kheej muaj hydrophilicity zoo, thiab cov cab kuj thiab cov kab mob saum npoo tuaj yeem tsim hydrogen bonding qauv; Lub caij no, lub zog dawb ntawm hydrophilic carrier nto yog qis dua li ntawm hydrophobic carrier nto, thiab cov kab mob hauv dej muaj feem ntau mus rau qhov chaw hydrophilic carrier nto rau adsorption thiab kev loj hlob.

3. Cov nyhuv kub ntawm MBBR biofilmed

Qhov ntsuas kub tsim nyog rau cov kab mob aerobic yog 10 ~ 35 degree. Cov dej kub muaj kev cuam tshuam ntau dua rau kev loj hlob ntawm cov kab mob nitrifying thiab nitrification tus nqi. Qhov kev loj hlob zoo rau cov kab mob nitrifying feem ntau yog 25 ~ 30 degree, thaum qhov kub qis dua 25 degree lossis siab dua 30 degree kev loj hlob ntawm cov kab mob nitrifying yog qeeb, qis dua 10 degree kev loj hlob ntawm cov kab mob nitrifying thiab nitrification yog qeeb qeeb. .

MBBR biofilmed xeem tau ua tiav ntawm 10 degree, 20 degree thiab 35 degree, thiab tus nqi ntawm cov kab mob uas txuas rau lub muab tub lim kuj tau ntsuas thaum lub sijhawm tag nrho cov txheej txheem dai. Cov txiaj ntsig tau pom tias: ntawm 10 degree, MBBR biofilmed pib maj mam, thiab nws siv 7d kom pom tseeb biofilm txuas, thiab MBBR biofilmed matured tom qab 21d, thiab qhov siab tshaj plaws ntawm biomass txuas yog 2.1 g / L; ntawm 35 degree, MBBR media pib biofilm tom qab 4d, thiab MBBR biofilmed matured Qhov siab tshaj plaws ntawm cov khoom siv biofilm yog 3.5 g / L tom qab txog 19 d. Thaum txog 20 degree, biofilm pib tsim tom qab 2 d, thiab qhov siab tshaj plaws ntawm biofilm txuas yog 5.7 g / L tom qab li 10 d. Nws tuaj yeem pom tias qhov cuam tshuam ntawm qhov kub ntawm cov yeeb yaj kiab dai tsis pom tseeb heev, thiab cov biofilm tuaj yeem tsim rau ntawm qhov chaw muab tub lim nyob rau hauv 15-30 degree , thiab cov yeeb yaj kiab hanging pib sai dua.

Qhov kub thiab txias yog qhov tseem ceeb cuam tshuam rau kev ua haujlwm lom neeg thiab muaj peev xwm metabolic, thiab nws cov kev cuam tshuam ntawm cov txheej txheem nitrification cov tshuaj tiv thaiv feem ntau yog nyob rau hauv cov qauv kev loj hlob thiab kev ua haujlwm lom neeg ntawm cov kab mob nitrifying.

Qhov cuam tshuam ntawm qhov kub thiab txias ntawm kev ua haujlwm lom neeg yog manifested likev cuam tshuam ntawm biochemical cov tshuaj tiv thaiv tus nqithiabkev cuam tshuam ntawm oxygen hloov pauv.

 

Aquasust Biofilm MBBR Carrier Media hauv Aeration Tank hauv Ob Hlis

4. Cov nyhuv ntawm MBBR cov neeg nqa khoom tshwj xeeb thaj chaw thiab qhov chaw roughness ntawm biofilm adhesion kev ua tau zoo

Qhov loj tshwj xeeb nto thiab roughness txhim kho lub peev xwm ntawm cov cab kuj mus ntes cov kab mob. Cov neeg nqa khoom nrog qhov loj ntawm qhov roughness muaj peev xwm rov ua dua tshiab rau cov dej ntws kom cov dej ntws hauv lub reactor muaj tsawg shear quab yuam ntawm biofilm ntawm cov cab kuj, thiab tib lub sij hawm muab ib qho chaw zoo rau kev sib xyaw thiab kev sib cuag ntawm cov kab mob thiab cov substrate. , uas txhawb nqa cov tsub zuj zuj ntawm biofilm rau ntawm qhov chaw ntim khoom. Qhov ntxhib saum npoo muaj txheej txheej ntawm laminar ciam teb ntau dua li qhov chaw du, uas tuaj yeem muab qhov chaw zoo li hydrodynamic ib puag ncig yog li zam qhov tsis zoo ntawm cov dej ntws tawm ntawm kev loj hlob ntawm cov kab mob txuas nrog.