Kev hloov pauv huab cua muaj txiaj ntsig cuam tshuam rau cov ntsiab lus thiab cov yam ntxwv ntawm NOM hauv cov dej saum npoo av los ntawm ntau cov txheej txheem nyuaj, ua rau NOM ua cov pa phem hauv kev kho dej haus. Siab -NOM cov dej feem ntau pom muaj xim siab thiab siab DOC (cov koob tshuaj rau ib cheeb tsam). NOM tsis tsuas yog ua rau muaj teeb meem xim thiab tsw hauv lub cev dej tab sis kuj ua rau cov tshuaj tua kab mob los tsim cov khoom carcinogenic.
Cov txheej txheem kev kho dej haus ib txwm muaj txwv NOM tshem tawm kev ua tau zoo, thaum cov txheej txheem cov txheej txheem organic membrane raug kev txom nyem los ntawm qhov tsis zoo xws li kev cuam tshuam rau fouling thiab tsis zoo corrosion kuj. Ceramic membrane txuas nrog coagulation muab lub tswv yim tshiab, qis-zog-siv, compact, thiab ruaj khov heev rau purifying siab -NOM dej nto.
Peb Txoj Kev Pretreatment: Los ntawm ib txwm mus rau qhov kawg Compactness
Ib pab neeg tshawb fawb nyob sab Europe tsim thiab muab piv rau peb tus qauv rau coagulation thiab flocculation pretreatment, ua tiav kev ua kom zoo dua qub ntawm cov txheej txheem ntws thaum ua kom muaj txiaj ntsig kev kho mob:
1. Ib txwm Ob -Tank Coagulation/Flocculation
Raws li hom kev kho mob classic, cov txheej txheem no siv ob - theem tsim qauv: lub tank sib xyaw nrawm thiab lub tank qeeb. Cov dej nyoos thiab cov coagulant tau sib xyaw ua ke hauv lub tank nrawm ua ntej nkag mus rau hauv lub tank flocculation kom tiav floc kev loj hlob, nrog rau tag nrho cov hydraulic tuav lub sij hawm (HRT) ntawm 21 feeb. Hom no muab cov tshuaj tiv thaiv zoo tab sis yuav tsum tau hneev taw loj thiab muaj nqi tsim kho siab.
2. Kev sib xyaw nrawm nrawm
Hom no ua kom yooj yim rau cov txheej txheem ntws, tshem tawm qhov qeeb flocculation tank thiab khaws cia tsuas yog lub tshuab sib tov nrawm. Cov coagulant thiab cov dej nyoos yog tov thiab ncaj qha nkag mus rau hauv daim nyias nyias, txo cov hydraulic tuav lub sij hawm mus rau 7 feeb. Thaum tuav tswj kev kho mob yooj yim, nws ua kom yooj yim rau kev teeb tsa cov cuab yeej.
3. Online Tubular Flocculation hom
Qhov no yog qhov kev daws teeb meem tshiab tshaj plaws hauv txoj kev tshawb no. Cov txheej txheem ntws raws li hauv qab no: dej nyoos + coagulant → membrane pub twj tso kua mis sib tov → tubular flocculant → ceramic membrane → permeate. Tsis muaj cov tshuaj tiv thaiv tank thoob plaws hauv cov txheej txheem; sib tov thiab flocculation yog ua tiav los ntawm cov kav dej. Lub sij hawm tuav hydraulic (HRT) tsuas yog 45 vib nas this, thiab G- tus nqi yog tswj ntawm 330 s⁻¹. Nws muaj qhov tsawg tshaj plaws hneev taw ntawm peb hom.
Core Parameters: Ceramic Membrane Hardware Support
Qhov kev sim siv cov khoom siv ceramic, uas, vim nws cov khoom siv tsis zoo ntawm cov tshuaj tiv thaiv thiab cov neeg kho tshuab siab, tau los ua cov khoom siv tseem ceeb rau kev ua haujlwm ruaj khov.
Cov txiaj ntsig kev sim: Siab-Kev Tshem Tawm Ua Haujlwm + Tsawg- Kev Ua Kom Zoo Dua Ob Qhov Zoo
Txoj kev tshawb no siv DOC, xim, thiab UV₂₅₄ raws li NOM ntsuas ntsuas thiab transmembrane siab sib txawv (TMP) raws li daim nyias nyias fouling ntsuas ntsuas, optimizing hom, ntau npaum, thiab pH nqi ntawm coagulants.
Qhov kev sim muab piv rau polyaluminium chloride thiab ferric chloride, thiab cov txiaj ntsig tau ua kom pom tseeb:
Kev tshem tawm DOC:
Aluminium ntsev tau ua tiav qhov kev tshem tawm ntawm 50% -85% ntawm pH 5.5, nce ntxiv nrog ntau npaum li cas.
Hlau ntsev ua tiav qhov kev tshem tawm siab tshaj plaws ntawm 87% ntawm pH 4.5 thiab 10 mg / L.
Kev tshem tawm xim:
Aluminum salts were optimally removed at pH 5.5, with a dosage as low as 2 mg/L achieving a removal rate >90%.
Hlau ntsev tau pom zoo tshem tawm ntawm pH 5.0, yuav tsum tau 6... Ua kom tiav cov txiaj ntsig sib npaug yuav tsum muaj ntau dua mg / L.
Qhov kev tshawb pom tseem ceeb ntawm txoj kev tshawb fawb yog tias ntau coagulant tsis tas yuav zoo dua.
Ntawm 2 mg / L txhuas ntsev: tsis txaus nqi neutralization, me me flocs, thiab yooj yim clogging ntawm daim nyias nyias pores.
Ntawm 5 mg / L txhuas ntsev: kev them nyiaj rov qab tuaj yeem tshwm sim, lossis cov khoom ntim ntawm daim nyias nyias yuav siab dhau.
Ntawm 3 mg / L txhuas ntsev: membrane fouling qis tshaj, thiab kev ua haujlwm ruaj khov tshaj plaws.
Qhov no txhais tau hais tias optimizing qhov ntau npaum yog qhov tseem ceeb tshaj qhov muag tsis pom kev.
Hais txog daim nyias nyias fouling, nws pom muaj zog heev stability, nrog tsawg heev irreversible membrane fouling. Ntawm ib qho txhuas ntsev ntau npaum li cas ntawm 3 mg Al / L, daim nyias nyias fouling tus nqi nce mus txog qib zoo, nrog rau ib qho - lub voj voog siab ntawm tsuas yog 40 mbar. Ua ke nrog kev rov qab ua haujlwm tsis tu ncua, kev ua haujlwm ntev - tuaj yeem tswj tau.
Nws yog ib nqi sau cia hais tias cov residual hlau concentration nyob rau hauv lub effluent yog ib tug tseem ceeb limiting qhia rau cov txheej txheem kev khiav hauj lwm. Nyob rau hauv qhov zoo pH ntau ntawm 4.5-5.5 rau NOM tshem tawm, seem seem ntawm txhuas thiab hlau yooj yim tshaj 150 ug / L (qhov txwv rau txhuas hauv "Standards for Drinking Water Quality GB5749-2022" yog 200 ug/L thiab hlau, 300 ug/L). Hauv kev tsim kho vaj tsev, nws yog ib qho tsim nyog yuav tsum sib npaug pH tus nqi thiab coagulant ntau npaum li cas, coj mus rau hauv tus account ob qho tib si tshem tawm kev ua tau zoo thiab kev nyab xeeb effluent.
Online tubular flocculation hom yog qhov kev xaiv zoo dua
Kev sib piv ntawm peb hom pretreatment tau nthuav tawm:
Xim thiab DOC tshem tawm tus nqi yog ob qho tib si nyob ib ncig ntawm 80%, nrog qhov sib txawv tsis txaus ntseeg.
Irreversible membrane fouling npaum li cas (0.06-0.10 mbar / h).
Cov dej turbidity tsis tu ncua nyob hauv qab 0.1 NTU.
Peb hom tsis pom qhov sib txawv tseem ceeb hauv NOM kev tshem tawm kev ua tau zoo, tab sis online tubular flocculation hom, nrog nws ultra- lub sijhawm hydraulic luv ntawm 45 vib nas this thiab cov qauv tsim tsawg yam tsis muaj cov tshuaj tiv thaiv tank, tau los ua qhov kev xaiv zoo.
Txoj kev tshawb no tau lees paub tias cov txheej txheem coagulation -flocculation + ceramic membrane siv tau rau kev ua kom huv ntawm cov dej saum npoo av nrog siab NOM (Nquag Oxygen Cov ntsiab lus): qis coagulant ntau npaum li cas ua tau raws li kev kho mob; ceramic membrane yog ntxuav thiab muaj lub neej ntev; thiab nws txoj kev siv hluav taws xob siv hluav taws xob tsawg dua li cov txheej txheem ib txwm muaj. Lub online tubular flocculation hom rhuav tshem cov kev txwv ntawm cov hneev taw loj uas muaj nyob hauv cov txheej txheem kev kho dej ib txwm muaj, muab kev txhawb nqa rau kev tsim kho ntawm cov cog cog, ntse dej haus.
Xaus
Tau ntsib nrog cov qauv kev haus dej nruj zuj zus ntxiv thiab cov teeb meem ntawm cov dej paug hauv qhov chaw, cov txheej txheem coagulation -ceramic membrane pretreatment sib npaug kev kho cov txiaj ntsig nrog txo cov nqi hluav taws xob engineering. Nrog nws cov txiaj ntsig tseem ceeb ntawm kev ua haujlwm siab - tshem tawm kev ua haujlwm tau zoo, muaj kuab paug tsawg, tsim qauv tsim, thiab kev siv hluav taws xob tsawg, nws muab txoj hauv kev tshiab rau cov nroj tsuag dej uas cuam tshuam nrog siab -organic- cov ntsiab lus dej (xws li cov dej hauv qab teb thiab qee qhov dej ntws nyob rau sab qaum teb).