Los ntawm: Kate
Email:kate@aquasust.com
Hnub tim: 21 Lub Ib Hlis 2025
1. Lub ntsiab lus ntawm membrane fouling
Membrane fouling feem ntau yog hais txog cov txheej txheem uas cov tshuaj nyob rau hauv membrane pores (sab nraud) thiab nyob rau hauv membrane pores mus thaiv thiab lub porosity kom tsawg, ua rau Kev ua kom tsis txhob muaj kev ua kom zoo thiab ua kom pom kev lim.
Thaum lub sijhawm ua haujlwm ntawm Membrane Filtration, cov dej lwg thiab cov tshuaj yeeb zoo txuas ntxiv los ntawm daim nyias nyias thiab tso nyiaj rau ntawm daim nyias nyias lossis tso nyiaj rau ntawm qhov chaw ntawm membrane, ua rau membrane fouling. Nws tuaj yeem hais tias Membrane kev cuam tshuam ua rau Membrane fouling.Kev ua ncaj qha ntawm daim nyias nyias fouling yog qhov txo qis hauv membrane Flux lossis qhov nce hauv kev ua haujlwm siab.
2. Hom tshuaj dawb huv
(1) Kev faib tawm los ntawm Puruels Composition
Organic paug
Feem ntau yog los ntawm macromolecular cov teeb meem organic (polysaccharides (polysacchar, thiab lwm yam), fluic acid, microbial flocs, thiab lwm yam hauv cov kua sib xyaw. Ntawm lawv, txawm hais tias qhov sib faib ntawm disport organic teeb meem SMSPL thiab EPS yog qhov tsawg heev piv rau MLSS, daim ntaub ua qias tuaj ua si tau piv rau MLSS, cov tshuaj lom mem tes rau ntawm lawv cov nyiaj rau 26% {%. Kev loj hlob thiab adsorganism ntawm membrane pores thiab nyob rau hauv daim nyias qab hau kuj tseem yog qhov tseem ceeb hauv kev ua pa membrane.
Inorganic pa paug
Tsim los ntawm cov kav hlau hlau thiab inorganic ntsev ion. Cov pa tsis huv ntawm cov membranes feem ntau yog cov tshuaj calcium, cov pa roj carbonate, cov roj ntsha, thiab cov roj ntsha li cas.
(2) kev faib tawm los ntawm cov kev ua qias tuaj
Reversible muaj kuab paug (qias neeg ib ntus): Membrane muaj kuab paug tuaj yeem raug tshem tawm ntawm qee cov kev ntsuas hauv cov khoom lag luam hauv cov khoom lag luam hauv cov khoom lag luam rau cov khoom hauv kev ua haujlwm hauv cov khoom lag luam rau cov khoom hauv kev ua haujlwm rau cov khoom hauv kev ua haujlwm rau cov khoom hauv kev ua haujlwm rau cov khoom hauv kev ua haujlwm hauv cov khoom lag luam rau cov khoom hauv kev ua haujlwm hauv cov khoom lag luam rau cov khoom hauv kev ua haujlwm hauv cov khoom lag luam rau cov khoom ntev; xws li backwashing nrog dej huv thiab kev npau taws co.
Kev qias neeg tsis huv (kev ua qias tuaj ntev): Membrane muaj kuab paug tau raug tshem tawm los ntawm kev tu nrog oxidants, acids, txo cov neeg sawv cev, thiab lwm yam.
Ob leeg reversible thiab tsis muaj kuab lom tuaj yeem ntxuav tawm. Cov pa phem uas tsis tuaj yeem ntxuav tawm los ntawm kev ntxuav tes txhais tau tias yog hu ua qias tuaj.
(3) Kev faib tawm los ntawm qhov chaw muaj kuab paug
Kev muaj kuab paug sab hauv yog tsim los ntawm adsorption, concentration, crystallization thiab kev sib sau ua ke hauv cov kua sib xyaw ua ke hauv daim nyias nyias; Kev ua paug dawb yog tsim los ntawm kev sib sau ua ke thiab kev tso nyiaj ntawm daim nyias nyias.
3Cov. Kev tswj kev ntsuas rau membrane pa paug
Qhov tseem ceeb rau membrane pa kom muaj kuab lom yog: muaj cov khoom siv ntawm daim nyias nyias, cov khoom ntawm cov kua thiab cov txheej txheem kev ua haujlwm. Kev ntsuas kev ntsuas yuav tsum tau muab los ntawm peb yam no kom tswj thiab daws cov tshuaj dawb huv.
(1) Muaj cov khoom ntawm daim nyias nyias
Lub cev nqaij daim tawv thiab tshuaj lom neeg ntawm daim nyias nyias yog txiav txim los ntawm cov khoom siv membrane. Cov anti-kev muaj kuab paug muaj peev xwm ntawm daim nyias nyias nyob hauv cov kua sib xyaw ua ke nrog nws cov khoom. Cov kev tshawb fawb tau pom tias lub hydrophilicity ntawm daim nyias nyias muaj qhov tseem ceeb heev rau kev tiv thaiv kev muaj kuab paug. Ntawm organic membrane cov ntaub ntawv, qee cov ntaub ntawv Hydrophilic xws li PVDSF, PE, thiab lwm yam. Hydrophibic cov khoom siv yuav tsum yog hydrophilic thaum siv. Vim muaj kev sib txawv hauv kev hloov kho cov txheej txheem, qhov ploj ntawm hydrophilicity thaum siv muaj ntau nrawm.
Tsis tas li ntawd, kev tawm tsam kev ua qias tuaj ntawm daim nyias nyias, thiab lwm tus tuaj yeem hais txog qhov quav, thiab lwm yam. raug txhim kho los ntawm kev xaiv cov khoom siv ua kom zoo dua hydrophilicity, kev txhim kho cov khoom siv ntxhib, xaiv cov khoom siv sib xyaw nrog cov khoom siv sib xyaw thiab cov khoom haum membrane pore loj.
Inorganic cov dej ntxhua khaub ncaws xws li Ceramic Las: Ua los ntawm Alumina, sicteron carntulages nyob rau hauv cov nqe lus ntawm flux, lub zog, thiab tshuaj ruaj khov.
(2) cov khoom ntawm cov cawv sib xyaw
Membrane fouling yog qhov tshwm sim ntawm kev sib cuam tshuam ntawm daim nyias nyias thiab cawv sib xyaw. Cov yam ntxwv ntawm cov cawv cawv muaj xws li sludge concentration thiab viscosity faib, deatolved organic teeb meem kev xav tau, thiab microbial meolical concentration.
Thaum lub sludge concentration yog tsawg, qhov sludge muaj peev xwm adsorb thiab demrade organic muaj teeb meem yog tsis txaus. Cov organic teeb meem muaj teeb meem hauv cov cawv cawv muaj zog, thiab cov txheej txheem gel ntau dua, uas tau yooj yim cov txheej txheem gel thiab ua kom cov kev ua kom tsis kam. Thaum lub sludge concentration yog siab dua li qee tus nqi, EPC concentration nce, thiab sludge viscosity nce nrawm. Lub viscosity cuam tshuam rau cov membrane flux thiab qhov loj ntawm npuas hauv cov cawv sib xyaw. Qhov sludge yog yooj yim tso rau ntawm daim nyias nyias chaw, sib sau ua ib txheej sludge tuab. Nws yog feem ntau ntseeg hais tias muaj tus nqi tseem ceeb rau sludge concentration. Thaum lub sludge concentration yog siab dua tus nqi no, nws yuav muaj cov kev tsis txaus siab ntawm daim duab membrane Flux. Yog li ntawd, qhov sludge concentration tuaj yeem tswj tau nyob rau hauv ib qho kev tsim nyog ntau rau kev tswj kom muaj kuab paug kom zoo. Sludge nthuav dav thiab sludge frandmentation tuaj yeem yooj yim ua rau cov tshuaj muaj kuab paug hnyav.
Ntxiv rau, cov dej tsis zoo ntawm MBR cov txheej txheem kuj tseem muaj tus yam ntxwv zoo rau cov khoom siv ntawm cov cawv sib xyaw, thiab ib co lej ntawm kev ua ntej yog qhov yuav tsum tau ua. Piv txwv li, cov plaub hau thiab cov khib nyiab yuav ua rau cov qauv, ua rau sludge txuam nrog hauv membrane kev sib dhos thiab yog li ntawv nyeem qias neeg. Cov kev sib txawv ntawm daim phiaj yuav tsum tau siv los tshem tawm lawv ua ntej nkag mus rau hauv lub aerobic biochemical cov txheej txheem; hais nrog siab tawv xws li av thiab xuab zeb yuav ua rau lub membrane puas, thiab lub turn drling tank yog xav tau tshem lawv; Roj ua rau muaj kuab paug rau daim nyias nyias nyias uas tsis tuaj yeem raug ntxuav tawm, thiab yog tias cov kev xav tau raug tshem tawm cov roj sib cais, thiab lwm yam .; Inorganic teeb meem: Tej zaum yuav precipition thiab teev rau ntawm daim nyias nyias ib sab, thaiv cov membrane pores. Nws tuaj yeem tswj tau los ntawm flocculation nag lossis ua kom haum rau kev tiv thaiv nag lossis daus. Lwm cov kev coj txawv txawv uas cuam tshuam rau daim nyias nyias, xws li cov organic, surfactants, zoo nkauj, yuav tsum tau them nyiaj tshwj xeeb rau hauv cov xwm txheej tshwj xeeb.
(3) Kev ua haujlwm ua haujlwm ib puag ncig
Subcritical flux
Lub ntsiab lus ntawm flux tseem ceeb yog tias muaj cov flux uas thaum flux yog ntau dua tus nqi no, TMP nce ntau; Thaum Flux tsawg dua li tus nqi no, TMP tseem ruaj khov. Cov tswvyim no tuaj yeem pab peb nrhiav cov lus qhia txog kev ua kom siab tshaj plaws ntawm Membrane Flux thiab tswj hwm Membrane fouling. Hauv kev ua haujlwm tiag tiag ntawm Membrane Compules, thaum cov kev ua haujlwm flux yog siab dua qhov kev ua haujlwm flux tseem ceeb, nws yog hu ua flux tseem ceeb, nws hu ua kev ua haujlwm flucitical flucitical. Hauv kev siv cov kev siv, cov flux tsim nyog yuav tsum raug xaiv. Qhov no ua haujlwm flux tus nqi yog nyob rau hauv cov kev ua subcritical ntau, thiab qee zaum kev ua haujlwm flux tsuas yog li 50% ntawm qhov tseem ceeb flux. Ntawm chav kawm, nyob rau hauv ib lub sij hawm mbr ntev, txawm tias kev ua haujlwm flucitical flucitical Flucitical tau saws, TMP ntawm daim nyias nyias.
Tsim Nyias Aeration
Hauv MBR, lub hom phiaj ntawm aeration tsis yog tsuas yog muab cov pa oxygen rau cov kab mob loj, tab sis kuj ua kom muaj kev sib cav sib ceg Nyob rau tib lub sijhawm, cov nyhuv tshee los ntawm kev sib tsoo ntawm npuas thiab ua kom nrawm nrawm ntawm membrane nto txwv thiab pab txo cov pa phem kom huv si. Thaum aeration loj dhau lawm, qhov me me ntawm cov khoom tso rau ntawm lub lim ncuav mog qab zib ntau dua, yog li nce ntawm membrane faltration kuj; Ntawm qhov tsis sib xws, thaum lub sij hawm lub nruab rau me me dhau, kev ntxhov siab yuav ua rau muaj zog thiab cov pa phem yuav tsim nyog yuav muaj kev txwv tsis pub muaj aeration.
Hloov chaw ua haujlwm thiab nres
Raws li peb-theem kev xav tau ntawm daim duab ua paug rau daim ntaub ua qias tuaj ua si, kev tsim ntawm Membrane cov pa phem yuav tsum muaj cov txheej txheem. Ua ntej, cov pa phem yuav raug adsorbed, tso nyiaj, thiab sau rau ntawm daim nyias nyias. Cov Txheej Txheem Sib Koom Tes Ua Haujlwm Xub Ua Haujlwm Hom Phiaj Chaw Ua Haujlwm Tsis Ncaj Ncees hauv lub cev tsis tu ncua, yog li cov dej ntws tawm hauv lub cev tsis tu ncua thiab dej ntws tawm ntawm daim nyias nyias tuaj yeem rov qab los. Feem ntau, lub sijhawm ntev dua, ntau dua kev sib txuam ntawm cov khib nyiab tshem tawm ntawm daim nyias xis; Ntev lub sijhawm nres, cov neeg swb ntxiv tso rau ntawm daim nyias nyias uas poob haujlwm, thiab cov membrane fundration kev ua tau tuaj yeem rov qab los. Hauv txoj ntsiab cai, kev ua haujlwm thiab nres lwm txoj kev uas ua tau raws li nws cov yam ntxwv yuav tsum tau txiav txim siab raws cov kev pom zoo ntawm Daim Ntawv Tso Cai ntawm Daim Ntawv Tso Cai Tso Cai thiab ua haujlwm ntawm qhov project tiag tiag.