Tshaj li 30 xyoo dhau los, kev siv tshuab membrane tau maj mam dhau los ua tus qauv rau kev ua kom huv hauv dej thiab kev kho dej haus. Txawm li cas los xij, ib lo lus nug tseem ceeb tau ua rau muaj kev txiav txim siab tsis tu ncua ntawm cov nroj tsuag dej- cov neeg tsim khoom: ceramics los yog cov organic membranes? Organic hollow fiber ntau ultrafiltration/microfiltration membranes (PVDF, PES cov ntaub ntawv) tau ntev dominated txij li thaum lawv daim ntawv thov nyob rau hauv thawj Fabkis cov dej cog nyob rau hauv 1988. Thaum ceramic membranes pib ua ntej, nws tsis yog mus txog rau thaum lub xyoo caum kawg, vim hais tias tus nqi txo thiab kev loj hlob ntawm technology, uas lawv tiag tiag pib cam lub dominance ntawm organic membranes. Cov ntsiab lus tsis sib xws nyob rau hauv qhov no: ceramic membranes muaj kev nqis peev siab pib tab sis lub neej ntev; organic membranes pheej yig dua tab sis ntsib cov nqi zais xws li kev laus, fiber ntau tawg, thiab flux poob. Kab lus no yog txhawm rau qhia meej qhov kev txiav txim siab- ua lub hauv paus uas txiav txim siab tus nqi hauv lub sijhawm luv thiab tag nrho cov nqi hauv lub sijhawm ntev.
I. Kev Sib Piv Kev Ua Haujlwm: Cov ntaub ntawv tsis sib haum xeeb hauv chav kuaj, tiag -Cov txiaj ntsig ntiaj teb
1. Flux Performance: Tsis muaj tus yeej
Kev tshawb fawb thaum ntxov (1990s) feem ntau ntseeg tias cov organic membranes muaj ntau dua flux, tab sis qhov teeb meem yog tias cov kev sim no tsis tswj cov hydraulic.
Qhov ntim - rau - thaj tsam piv (V/A) ntawm cov membrane modules cuam tshuam rau Reynolds tus naj npawb thiab permeability. Thaum cov kws tshawb fawb tau ntsuas cov txheej txheem hydraulic, lawv pom tias: qhov sib txawv ntawm qhov sib txawv ntawm cov ceramic thiab cov organic yog tsawg; ceramic membranes muaj ntau dua backwashing efficiency; tshuaj ntxuav kev ua tau zoo yog piv rau ob qho tib si; thiab nyob rau hauv cov dej uas muaj cov ntsiab lus calcium siab, ceramics tau pom muaj zog tiv thaiv kom tsis txhob muaj fouling.
Cov ntsiab lus tseem ceeb: luv luv- lub sij hawm xeem lub rooj zaum tsis tuaj yeem cuam tshuam qhov sib txawv tiag tiag; engineering tsim yog qhov tseem ceeb tshaj li cov khoom siv membrane nws tus kheej.
2. Teeb meem Kev laus: Lub pob taws ntawm Achilles ntawm cov organic membranes. Qhov no yog qhov kev sib tw tseem ceeb ntawm cov khoom siv ceramic, tab sis kuj yog qhov yooj yim tshaj plaws underestimated ntev - nqi.
Tus nqi tseeb ntawm kev kho daim nyias nyias: Txhua daim nyias nyias yuav tsum tau kwv yees li 1.5 tus txiv neej- teev; Cov nroj tsuag dej loj tuaj yeem ntsib 10-80 qhov tawg ntawm daim nyias nyias ib lab litres ntawm txhua hnub muaj peev xwm hauv ib xyoos. Rau cov nroj tsuag dej me me, tus nqi zog ntawm kev kho cov membrane puas tuaj yeem suav txog 40% ntawm cov nqi khiav haujlwm (OPEX).
II. Kev txiav txim siab-Ua lub moj khaum: Plaub kauj ruam los xaiv txoj cai Membrane Technology
Raws li kev txheeb xyuas, peb pom zoo kom txiav txim siab cog tsob ntoo dej- cov neeg tsim tshuaj ntsuam xyuas raws li cov txheej txheem hauv qab no:
Step 1: Water Source Characteristics Assessment High organic matter/high turbidity surface water → Ceramic membrane advantages extended to low turbidity groundwater → Organic membranes may be sufficient
Kauj Ruam 2: Economies of Scale Assessment Me me dej nroj tsuag (<5 MLD) → Ceramic membranes' labor-saving value amplified to large water plants → Requires precise calculation of CFL ratio
Kauj Ruam 3: Kev Xaiv Tus Qauv Nyiaj Txiag Tso Cai rau CAPEX-OPEX kev lag luam-offs (xws li, PPP qauv) → Ceramic membranes nyiam qis- nqi twv → Organic membranes muaj luv luv -lub sij hawm kom zoo dua
Kauj Ruam 4: Risk Tolerance Aversion to Operational Uncertainty → Ceramic membranes txais lub caij nyoog hloov pauv thiab tu → Organic membranes
