Tubular Membrane Cov Khoom Siv Ntsuas Me Me

Tubular Membrane Small Test Device yog ib qho chaw kho dej hauv ib qho uas siv cov thev naus laus zis los ua kom dej huv. Cov thev naus laus zis no ua haujlwm los ntawm kev lim dej los ntawm cov khoom siv ceramic uas muaj zog heev thiab muaj peev xwm tiv taus qhov kub thiab txias, tshuaj corrosive, thiab siab. Nws yooj yim, durability, thiab lub zog efficiency ua rau nws yog ib qho kev xaiv zoo heev rau ntau yam kev kho dej. Cov cuab yeej tuaj yeem hloov kho raws li kev siv scenarios.

Ib qho txiaj ntsig tseem ceeb ntawm JMFILTEC tubular membrane kuaj cov cuab yeej yog tias nws tuaj yeem tshem tawm cov impurities zoo, xws li tshem tawm cov khib nyiab, cov kab mob, kab mob, thiab lwm yam kab mob phem, los tsim cov dej haus huv thiab nyab xeeb. Tsis tas li ntawd, nws tuaj yeem siv los kho cov dej khib nyiab los ntawm kev lag luam thiab kev ua liaj ua teb, ua rau kev daws teeb meem ib puag ncig.

Lwm qhov txiaj ntsig ntawm cov khoom no yog tias lawv yooj yim rau nruab thiab tswj. Lawv feem ntau yog tsim los ua ib chav tsev compact nrog tag nrho cov khoom tsim nyog rau kev kho dej. Qhov no ua rau nws yooj yim rau kev thauj mus los thiab teeb tsa hauv txhua qhov av yam tsis tas yuav tsum tau tshwj xeeb infrastructure.

Tsis tas li ntawd, cov tshuab no muaj zog-npaum piv rau lwm cov kev kho dej ib txwm siv, yog li txuag cov nqi hauv lub sijhawm ntev. Tsis tas li ntawd, lawv muaj cov nqi khiav lag luam uas tsis tshua muaj nqi vim tias cov khoom siv ceramics muaj kev tiv thaiv zoo rau fouling thiab kev ntxuav ntawm daim nyias nyias yog yooj yim thiab ceev.

Nrog rau txoj kev loj hlob sai ntawm kev tshawb fawb thiab thev naus laus zis, ntau qhov chaw dej ntawm cov nroj tsuag dej uas twb muaj lawm muaj cov dej tsis zoo hauv cov dej vim kev hloov pauv ntawm cov dej tsis zoo vim kev nyab xeeb ib puag ncig, uas ua rau kev kho dej hauv cov nroj tsuag dej nyuaj dua thiab yuav tsum tau ua cov txheej txheem dej tob. Micro-polluted water sources yog xa mus rau cov dej uas nws lub cev, tshuaj thiab microbiological ntsuas tsis tuaj yeem ua tau raws li qhov xav tau ntawm cov dej zoo rau cov dej haus hauv "Surface Water Environmental Quality Standard" GB 3838-2002. Muaj ntau hom kev ua qias tuaj, suav nrog cov khoom uas ua rau turbidity, xim thiab tsw, inorganic tshuaj xws li sulfur thiab nitrogen oxides, ntau yam teeb meem thiab lom organic tshuaj, hnyav hlau xws li mercury, manganese, chromium, lead, arsenic, thiab lwm yam. radioactive thiab pathogenic microorganisms, thiab lwm yam. Thaum cov pa kev kho mob (coagulation, sedimentation los yog clarification, pom, disinfection) yog qhov nyuaj ua kom cov dej tsis huv hauv cov dej tsis zoo raws li cov qauv dej haus, pretreatment, sib sib zog nqus kev kho mob, thiab cov txheej txheem kho membrane tuaj yeem muab ntxiv raws li kev kho mob ib txwm ua kom lub Hoobkas dej ua tau raws li cov qauv dej haus. Cov hauv qab no yog cov lus qhia ntxaws ntxaws rau cov txheej txheem kho dej rau micro-polluted dej:

I. Pretreatment

1. Biological pretreatment technology: Siv cov metabolism hauv microorganisms kom tshem tawm cov pa phem xws li cov organic teeb meem thiab ammonia nitrogen hauv dej, txo cov load ntawm cov txheej txheem kho tom ntej. Cov txheej txheem lom neeg pretreatment muaj xws li cov av ntub dej, tshuaj lom neeg sib cuag oxidation, aerated biological filters, thiab lwm yam. Kev tshem tawm tus nqi ntawm ammonia nitrogen thiab nitrite nitrogen hauv cov av ntub dej tuaj yeem ncav cuag 35% ~ 40%, thaum kev sib cuag oxidation thiab aerated biological lim tau dav siv hauv tej yaam num.

2. Tshuaj lom neeg ua ntej oxidation: Los ntawm kev ntxiv cov tshuaj oxidants xws li ozone, poov tshuaj permanganate, thiab lwm yam, organic pollutants nyob rau hauv dej yog degraded los txhim kho efficiency ntawm kev kho mob tom ntej. Piv txwv li, ozone pre-oxidation tuaj yeem txhim kho qhov kev tshem tawm ntawm CODMn.

II. Kev kho mob

1. Coagulation thiab sedimentation: Ntxiv coagulants rau hauv dej, tshem tawm cov teeb meem tshem tawm, colloids thiab qee cov organic teeb meem los ntawm kev sib xyaw, coagulation thiab sedimentation txheej txheem, thiab txo lub nra ntawm cov lim tom ntej. Coagulation thiab sedimentation yog ib feem tseem ceeb ntawm kev kho dej ib txwm siv tshuab thiab tuaj yeem txhim kho cov dej zoo.

2. Kev lim dej: siv cov lim lim xuab zeb lossis lim dej kom tiv thaiv kom tsis txhob muaj teeb meem zoo ntxiv rau lawv kom tiv thaiv cov txheej txheem kev kho mob tom ntej lossis cov khoom siv dej. Kev lim dej tuaj yeem tsis tsuas yog txhim kho pob tshab ntawm cov dej zoo, tab sis kuj txo cov concentration ntawm qee cov pa phem.

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tiaj daim ntawv membrane

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III. Kev kho mob tob

1. Cov pa roj carbon activated adsorption: Siv cov pa roj carbon lim dej ua kom cov pa roj carbon monoxide adsorb cov organic teeb meem thiab cov ntxhiab tsw hauv dej, txhim kho cov saj thiab kev nyab xeeb ntawm dej.

2. Membrane filtration technology: suav nrog microfiltration, ultrafiltration, nanofiltration thiab thim rov qab osmosis, thiab lwm yam, xaiv cov txheej txheem membrane tsim nyog raws li kev kho mob sib txawv. Membrane filtration tuaj yeem tshem tawm cov kab mob, kab mob thiab qee qhov nyuaj-rau-degrade organic teeb meem hauv dej.

3. Ozone-bioactivated carbon technology: Muab ozone oxidation thiab bioactivated carbon adsorption technology los txhim kho cov nyhuv tshem tawm ntawm cov organic teeb meem nyuaj, thaum ua tiav cov tshuaj tua kab mob thiab txhim kho saj.

IV. Oxidation technology

1. Ozone / hydrogen peroxide ua ke nrog lub teeb ultraviolet: Los ntawm kev tsim cov hydroxyl radicals, feem ntau cov organic teeb meem yog oxidized thiab decomposed, DBPs precursors raug txo, thiab haus dej kev nyab xeeb yog zoo dua.

2. Photocatalytic oxidation: Siv photocatalysts xws li titanium dioxide los tsim cov dawb radicals nyob rau hauv lub teeb, uas tsis yog-selectively mineralize ntau yam organic teeb meem, thiab tsis txhob muaj cov pa phem thib ob.

Hauv cov ntsiab lus, cov txheej txheem kev kho dej rau micro-polluted dej npog ntau cov kauj ruam xws li pretreatment, pa kev kho mob, sib sib zog nqus kev kho mob thiab advanced oxidation technology. Txhua kauj ruam muaj kev ua haujlwm siab hauv kev tshem tawm cov pa phem tshwj xeeb. Hauv kev siv tswv yim, cov thev naus laus zis sib txawv yuav tsum raug xaiv kom tsim nyog thiab ua ke raws li cov yam ntxwv ntawm cov dej hauv dej zoo thiab cov hom phiaj kev kho mob kom ntseeg tau tias kev nyab xeeb thiab kev nyiam huv ntawm cov dej haus.

Lub hauv paus ntsiab lus ntawm coagulation yog lub ntsiab lus tseem ceeb hauv kev kho dej thiab dej khib nyiab. Nws koom nrog cov txheej txheem ntawm kev sib sau cov colloidal hais thiab cov khib nyiab me me hauv dej los ntawm cov txheej txheem tshwj xeeb (xws li ntxiv cov tshuaj tua kab mob). Cov txheej txheem coagulation feem ntau suav nrog ob txheej txheej txheej txheem: coagulation thiab flocculation, thiab coagulants yog tus yuam sij rau kev ua tiav cov txheej txheem no. Cov hauv qab no yog cov ncauj lus kom ntxaws tsom xam ntawm txoj cai coagulation:

I. Txheej txheem cej luam ntawm cov txheej txheem coagulation

Coagulation yog hais txog cov txheej txheem ntawm kev ntxiv cov coagulants rau hauv dej kom tsis txhob muaj cov colloidal hais thiab cov khib nyiab me me hauv dej thiab sib sau ua ke rau hauv cov khoom loj los yog floccules, thiab tom qab ntawd cais lawv ntawm dej. Cov txheej txheem no yog ib qho tseem ceeb hauv kev ua haujlwm hauv dej thiab dej khib nyiab thiab siv dav hauv kev kho dej haus, kev kho dej khib nyiab thiab lwm yam haujlwm.

II. Coagulation mechanism

Cov txheej txheem coagulation muaj ntau yam txheej txheem, feem ntau suav nrog cov hauv qab no:

Compressed ob txheej txheej mechanism:

• Thaum cov electrolytes ntxiv rau cov tshuaj, cov ion concentration hauv cov tshuaj nce ntxiv thiab cov thickness ntawm cov txheej diffusion txo.
• Thaum ob lub colloid hais txog ib leeg, lub thickness ntawm diffusion txheej txo, lub zeta muaj peev xwm txo, thiab lub zog repulsive txo, yog li cov colloid hais tau sai coagulated.

Adsorption nqi neutralization mechanism:

• Qhov saum npoo ntawm cov khoom colloid muaj qhov muaj zog adsorption ntawm ib feem nrog cov nqi sib txawv.
• Qhov no adsorption neutralizes ib feem ntawm tus nqi ntawm cov colloid hais, txo cov electrostatic repulsion, thiab ua rau nws yooj yim rau cov colloid hais mus cuag thiab adsorb mus rau lwm yam hais.

Adsorption choj mechanism:

• Polymers (xws li polyacrylamide) adsorb rau ib leeg nrog colloid hais.
• Polymers txuas ntau yam colloids zoo li txuas hniav los tsim cov floccules loj.

Sediment Netting Mechanism:

• Thaum cov hlau ntsev los yog hlau oxides thiab hydroxides ntxiv raws li coagulants loj txaus, precipitates yuav tsim sai.
• Cov precipitates yuav net cov colloid hais thiab tshem tawm cov teeb meem nyob rau hauv dej thaum lub sij hawm tsim txheej txheem, cais lawv los ntawm dej.

III. Kev xaiv thiab ntxiv cov coagulants
Kev xaiv thiab ntxiv cov coagulants muaj qhov cuam tshuam tseem ceeb ntawm cov nyhuv coagulation. Feem ntau siv coagulants tuaj yeem muab faib ua ob pawg: inorganic ntsev thiab polymers. Inorganic ntsev coagulants muaj xws li txhuas ntsev (xws li txhuas sulfate, polyaluminium chloride, thiab lwm yam) thiab hlau ntsev (xws li ferric chloride, ferrous sulfate, thiab lwm yam). Polymer coagulants muaj xws li polyacrylamide thiab lwm yam.

Thaum ntxiv coagulants, qhov zoo tshaj plaws npaum li cas thiab kev txiav txim ntawm qhov sib ntxiv yuav tsum tau txiav txim siab raws li qhov xwm ntawm cov dej nyoos, hom thiab concentration ntawm cov pa phem, thiab lwm yam. Qee zaum, txhawm rau kom tau txais cov txiaj ntsig coagulation zoo dua, cov coagulants inorganic yuav tsum tau siv ua ke nrog polymer coagulants.

IV. Kev cuam tshuam ntawm hydraulic tej yam kev mob
Hydraulic tej yam kev mob kuj yog ib tug ntawm cov tseem ceeb yam uas cuam tshuam cov coagulation nyhuv. Thaum lub sij hawm coagulation txheej txheem, lub stirring siv thiab stirring lub sij hawm yuav tsum tau tswj xyuas kom meej tias cov coagulant thiab cov dej khib nyiab yog tag nrho tov thiab tsim floccules zoo. Kev sib xyaw ua ke yuav tsum muaj cov coagulant thiab cov dej khib nyiab sib xyaw kom sai thiab sib npaug, thaum lub sij hawm cov tshuaj tiv thaiv yuav tsum tau tsim kom muaj kev sib tsoo txaus thiab zoo adsorption tej yam kev mob kom cia cov floccules kom muaj kev loj hlob txaus.

V. Summary
Lub hauv paus ntsiab lus ntawm coagulation yog destabilize cov colloidal hais thiab me me tshem tawm cov khib nyiab nyob rau hauv dej thiab aggregate lawv mus rau hauv loj hais los yog floccules los ntawm kev ntxiv coagulants thiab tswj hydraulic tej yam kev mob thiab lwm yam, yog li ua tiav kev sib cais. Cov txheej txheem no muaj kev sib koom ua ke ntawm ntau lub tshuab thiab cuam tshuam los ntawm ntau yam xws li hom coagulant, ntau npaum li cas, thiab hydraulic tej yam kev mob. Hauv kev siv tswv yim, nws yog ib qho tsim nyog los xaiv cov coagulants tsim nyog thiab kev ua haujlwm raws li cov xwm txheej tshwj xeeb kom tau txais txiaj ntsig zoo tshaj plaws coagulation.

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