Cov khoom siv rov qab osmosis tshem tawm cov kab mob li cas?

Rov qab osmosis (RO) thev naus laus zis tau hloov pauv cov txheej txheem dej huv thoob plaws ntau yam kev lag luam. A rov qab osmosis cog tshem tawm ntau yam kab mob ntawm cov dej, ua rau cov dej huv zoo rau ntau yam kev siv. Txoj kev lim dej siab heev no siv cov khoom siv semi-permeable membranes kom tshem tawm cov khoom tsis huv, cov khoom khov uas yaj, thiab cov pa phem los ntawm cov dej. Cov txheej txheem no suav nrog kev siv lub zog los yuam cov dej molecules hla cov qhov me me hauv daim nyias nyias, thaum cov khoom loj dua raug tso tseg. Hauv ib qho kev cai rov qab osmosis system, dej raug kho ua ntej kom tshem tawm cov khoom loj dua thiab tiv thaiv cov khoom me me ro cevs. Cov dej uas tau kho ua ntej lawm ces raug nias thiab yuam kom dhau los ntawm cov ntaub so semi-permeable, uas ua haujlwm ua lub molecular sieve. Cov txheej txheem no tshem tawm tau txog li 99% ntawm cov khoom khov uas yaj, cov organic compounds, thiab lwm yam tsis huv. Cov dej huv, hu ua permeate, raug sau rau kev siv lossis kev kho ntxiv, thaum cov dej khib nyiab uas muaj concentrated, lossis reject, raug tso tawm lossis rov ua dua nyob ntawm tus qauv tsim ntawm lub kaw lus.

Kev tshawb fawb tom qab kev tsis lees paub cov kab mob hauv RO

Rov qab osmosis systems zoo tshem tawm cov kab mob vim yog cov qauv tshwj xeeb ntawm lawv daim nyias nyias, uas yog tsim los lim tawm txawm tias qhov me me tshaj plaws. Cov daim nyias nyias no feem ntau yog ua los ntawm cov ntaub ntawv nyias nyias, muaj cov pores me me uas lawv tuaj yeem thaiv cov kab mob me me li ib tus neeg ions. Kev tsis lees paub cov kab mob no yog nyob ntawm ntau lub hauv paus ntsiab lus tseem ceeb:

Qhov loj cais tawm yog thawj txoj hauv kev ntawm kev tshem tawm cov kab mob. Lub membrane lub qhov hws yog me me txaus los thaiv cov khoom loj, xws li cov khib nyiab pov tseg thiab cov kab mob, tiv thaiv lawv los ntawm cov kab ke.

Charge repulsion plays lub luag haujlwm tseem ceeb thiab. Ntau RO daim nyias nyias muaj tus nqi tsis zoo, uas ua rau cov kab mob sib kis zoo sib xws xws li cov ntsev yaj thiab cov zaub mov. Qhov kev sib cuam tshuam electrostatic no ntxiv txhim kho cov txheej txheem pom, txhim kho daim nyias nyias lub peev xwm los tsis lees txais cov kab mob.

Thaum kawg, diffusion tswj cuam tshuam rau kev ua haujlwm ntawm qhov system. Cov dej molecules, ua me me thiab ntau lub xov tooj ntawm tes, dhau los ntawm daim nyias nyias yooj yim dua li cov molecules loj lossis cov kab mob. Qhov sib txawv ntawm qhov sib txawv no ua rau RO cov tshuab xaiv xaiv tso dej kom dhau thaum thaiv cov kab mob.

Ua ke, cov txheej txheem no xyuas kom meej tias cov txheej txheem rov qab osmosis muaj txiaj ntsig zoo ntawm kev lim dej los ntawm kev tshem tawm ntau yam kab mob.

BWRO cov nroj tsuag piv rau cov qauv RO li cas rau kev tshem tawm cov kab mob?

BWRO cov nroj tsuag, los yog Brackish Water Reverse Osmosis nroj tsuag, tshwj xeeb rov qab osmosis systems tsim los kho cov dej uas muaj qhov nruab nrab salinity. Thaum ob tus qauv RO thiab BWRO cov nroj tsuag siv cov qauv zoo sib xws, muaj qee qhov sib txawv tseem ceeb hauv lawv cov peev xwm tshem tawm cov kab mob:

Salinity kam rau ua

BWRO cov nroj tsuag tau kho kom zoo los daws cov dej nrog cov khoom sib xyaw ua kom siab dua piv rau cov qauv RO. Qhov no ua rau lawv muaj txiaj ntsig tshwj xeeb rau kev kho cov dej hauv av lossis cov dej hauv av nrog cov qib salinity siab.

Zog efficiency

Vim tias qhov qis qis ntawm cov dej pub, BWRO cov nroj tsuag feem ntau ua haujlwm ntawm qhov qis dua li cov dej hiav txwv RO. Qhov no txhais tau hais tias txo qis kev siv hluav taws xob thiab cov nqi khiav lag luam thaum tswj kom muaj cov kab mob sib kis tau zoo.

Membrane configuration

BWRO cov nroj tsuag feem ntau siv cov txheej txheem tshwj xeeb thiab cov khoom siv kho kom haum rau kev kho dej brackish. Cov kev hloov pauv no tuaj yeem txhim kho kev tshem tawm cov kab mob paug thiab kev ua haujlwm ntev ntawm daim nyias nyias hauv cov dej nyuaj.

Rov qab osmosis system filtration: dissolves solids vs. microorganisms

thaum rov qab osmosis systems muaj txiaj ntsig zoo ntawm kev tshem tawm qhov dav dav ntawm cov kab mob, lawv qhov kev ua tau zoo tuaj yeem sib txawv nyob ntawm seb hom impurity. Kev nkag siab txog qhov sib txawv ntawm kev ua kom pom kev zoo rau cov khoom tawg thiab cov kab mob me me yog qhov tseem ceeb rau kev txhim kho RO system tsim thiab kev ua haujlwm.

Dissolved solids tshem tawm

RO membranes ua tau zoo ntawm kev tshem tawm cov khoom tawg ntawm dej. Cov no suav nrog:

Inorganic ions (xws li sodium, chloride, calcium, magnesium)
Cov hlau hnyav (piv txwv li, lead, arsenic, mercury)
Dissolved organic tebchaw

Tus nqi tsis lees paub rau cov khoom tawg hauv cov txheej txheem RO uas tsim tau zoo tuaj yeem tshaj 99%, ua qhov kev xaiv zoo tshaj plaws rau cov ntawv thov uas xav tau cov dej ntshiab huv, xws li hauv kev lag luam tshuaj lossis semiconductor.

Microorganism filtration

RO membranes kuj muaj txiaj ntsig zoo ntawm kev tshem tawm cov kab mob, suav nrog:

Cov kab mob
kab mob
protozoa

Qhov pore loj ntawm RO daim nyias nyias yog feem ntau me dua qhov loj ntawm cov kab mob feem ntau, ua kom lawv lub cev tshem tawm ntawm cov dej ntws. Txawm li cas los xij, nws tseem ceeb heev uas yuav tsum nco ntsoov tias RO systems tsis yog tsim los ua cov txheej txheem tshuaj tua kab mob, thiab cov txheej txheem kho mob ntxiv yuav tsim nyog los xyuas kom meej cov kab mob microbial tiav.

Synergistic pom

Kev sib xyaw ua ke ntawm cov khoom tawg thiab tshem tawm cov kab mob hauv RO ua rau muaj kev sib koom ua ke. Los ntawm kev tshem tawm cov khoom noj uas yaj thiab cov organic tebchaw, RO pom kuj txo cov peev xwm loj hlob microbial hauv cov dej kho, ntxiv dag zog rau nws qhov zoo thiab ruaj khov.

Hauv kev xaus, thim rov qab osmosis thev naus laus zis muab cov kev daws teeb meem muaj zog thiab ntau yam rau kev tshem tawm cov kab mob hauv cov ntawv kho dej. Los ntawm cov txheej txheem RO mus rau tshwj xeeb rov qab osmosis cog, cov thev naus laus zis no txuas ntxiv mus ntxiv, ua tau raws li kev xav tau ntawm ntau yam kev lag luam xws li kev kho dej hauv nroog mus rau cov txheej txheem kev lag luam siab.

Koj puas tab tom nrhiav kev daws teeb meem osmosis rov qab txhim khu kev qha thiab ua haujlwm tau zoo rau koj cov kev xav tau kev kho dej? Guangdong Morui Environmental Technology Co., Ltd. tshwj xeeb hauv kev siv cov thev naus laus zis kho dej tshiab, suav nrog kev kho cov dej khib nyiab hauv kev lag luam, kev kho cov dej phwj hauv tsev, kev tshem dej hiav txwv, thiab kev tsim dej haus. Peb pab neeg kws tshaj lij muab cov kev pabcuam dav dav, txij li kev muab cov khoom siv mus rau kev teeb tsa, kev ua haujlwm, thiab kev txhawb nqa tom qab muag.

Nrog peb lub chaw tsim khoom siv membrane zoo tshaj plaws thiab cov chaw ua khoom siv, peb muab cov kev daws teeb meem tshwj xeeb rau koj cov kev xav tau tshwj xeeb. Txawm hais tias koj xav tau lub kaw lus RO me me lossis lub Hoobkas BWRO loj, peb cov khoom siv xa cov kev ua tau zoo tshaj plaws thiab kev ntseeg siab. Tsis txhob cia cov teeb meem zoo ntawm dej cuam tshuam koj txoj kev lag luam. Tiv tauj peb hnub no ntawm yog benson@guangdongmorui.com kom pom tias peb cov kev daws teeb meem rov qab osmosis zoo li cas tuaj yeem hloov koj cov txheej txheem kho dej.

References

1. Greenlee, LF, et al. (2009). Rov qab osmosis desalination: Cov peev txheej dej, thev naus laus zis, thiab cov teeb meem niaj hnub no. Kev Tshawb Fawb Dej, 43(9), 2317-2348.

2. Fritzmann, C., et al. (2007). Lub xeev-ntawm-tus-kos duab ntawm thim rov qab osmosis desalination. Desalination, 216(1-3), 1-76.

3. Lee, KP, et al. (2011). Kev tshuaj xyuas ntawm cov ntaub ntawv rov qab osmosis membrane rau desalination-Kev txhim kho rau hnub tim thiab yav tom ntej muaj peev xwm. Phau ntawv Journal of Membrane Science, 370(1-2), 1-22.

4. Malaeb, L., & Ayoub, GM (2011). Rov qab osmosis thev naus laus zis rau kev kho dej: Kev tshuaj xyuas lub xeev. Desalination, 267(1), 1-8.

5. Qasim, M., et al. (2019). Rov qab osmosis desalination: Kev tshuaj xyuas lub xeev-ntawm-tus-kos duab. Desalination, 459, 59-104.

6. Shahid, MK, & Choi, YG (2018). Txoj kev tshawb fawb sib piv rau kev ntsuas ntsuas ntawm qhov chaw ntawm RO daim nyias nyias hauv cov dej khib nyiab rov qab: CO2 purging piv rau peb qhov sib txawv antiscalants. Phau ntawv Journal of Membrane Science, 546, 61-69.