Ntau tus neeg tshiab rau kev kho dej phwj tuaj pib tsis meej pem los ntawm ob lub ntsiab lus Askiv no. Nyob rau ntawm lub rooj sau ntawv khiav, nws tau sau txhua hnub, tab sis yog tias tam sim ntawd nug:
MLSS sawv cev li cas?
MLVSS saib dua yog dab tsi?
Ntau tus neeg yuav teb:
MLSS yog sludge concentration, MLVSS yog organic sludge. "
Cov lus no tsis tuaj yeem yuam kev, tab sis qhov tseeb, nws tsuas yog ib nrab xwb.
Yog tias koj tsuas nco qab lub ntsiab lus ntawm cov ntawv no, nws yog qhov nyuaj rau kev nkag siab tiag tiag lawv cov nqi hauv kev ua haujlwm tiag tiag. Yuav kom nkag siab txog ob qhov ntsuas no, peb yuav tsum xub qhia meej ib lo lus nug:
Dab tsi yog qhov muaj pes tsawg leeg ntawm "sludge" hauv aeration tank.
" av nkos" nyob rau hauv lub aeration tank tsis yog tag nrho ntawm cov kab mob
Muaj coob tus neeg xav tias cov sludge nyob rau hauv lub activated sludge tank yog cov kab mob.
Tab sis qhov xwm txheej tiag tiag tsis yog li ntawd.
Cov kua sib xyaw hauv lub aeration tank yog qhov ua tau zoo ntawm kev ncua kev kawm, uas tuaj yeem faib ua peb hom tshuaj.
Ib hom yog microorganisms lawv tus kheej.
Xws li cov kab mob, protozoa, thiab protozoa, cov no yog qhov tseeb "cov neeg ua haujlwm" ntawm lub tshuab ua kom cov sludge, lub luag haujlwm rau decomposing organic teeb meem, nitrification denitrification, thiab phosphorus uptake tshwm sim.
Lwm hom yog cov khoom tsim los ntawm microbial metabolism.
Piv txwv li, extracellular polymeric substances (EPS), microbial khib nyiab, colloidal tshuaj, thiab lwm yam. Txawm hais tias cov no tsis muaj sia nyob cell, lawv tseem yog cov organic teeb meem.
Lwm hom yog inorganic hais.
Piv txwv li, xuab zeb hais, hlau ntsev los nag, ntxhia hais, thiab lwm yam coj los ntawm dej ntws. Cov no tsis koom nrog cov tshuaj biochemical, tab sis yuav muaj nyob rau hauv lub cev rau lub sijhawm ntev.
Yog li, cov sludge nyob rau hauv lub aeration tank yog tiag tiag sib tov ntawm cov organic teeb meem thiab inorganic teeb meem.
Qhov sib txawv ntawm MLSS thiab MLVSS tseem ceeb nyob rau hauv qhov txawv ntawm ob qhov chaw.
MLSS: Ntau npaum li cas "mav" nyob rau hauv lub system
Lub npe tag nrho ntawm MLSS yog Mixed Liquor Suspended Solids, uas txhais tau tias:
Concentration ntawm suspended solids nyob rau hauv lub mix tov.
Yooj yim muab, nws teb cov lus nug ncaj qha:
Muaj pes tsawg cov khib nyiab uas muaj nyob rau hauv lub aeration tank.
Qhov no suav nrog:
kab mob
Organic residue
Cov tshuaj colloidal
inorganic hais
Sediments thiab sediments
Txhua yam khoom raug tshem tawm hauv dej yuav raug suav hauv MLSS.
Qhov ntawd yog hais tias: MLSS=organic solids + inorganic solids
Nws zoo li 'tag nrho tus kav' siv los ntsuas cov av nkos hauv qhov system.
Hauv kev ua haujlwm zoo, MLSS yog ib qho ntawm feem ntau siv cov ntsuas ntsuas. Qhov ntau yam ntawm MLSS hauv cov txheej txheem sib txawv yog kwv yees li hauv qab no:
Tsoos activated sludge system: 2000-4000 mg / L
A ² O system: 3000-5000 mg / L
MBR system: 6000-12000 mg / L
MLSS tsawg dhau lawm, qhia tau hais tias cov pej xeem microbial nyob rau hauv lub cev tsis txaus, thiab lub peev xwm ua haujlwm yuav tsis tuaj yeem ua raws li cov khoom thauj.
Yog tias MLSS siab dhau lawm, nws yuav ua rau muaj teeb meem xws li cov av tsis zoo, tsis yooj yim rau cov pa oxygen, thiab cov khoom hnyav ntxiv rau ntawm lub tank thib ob.
Yog li ntawd, cov neeg ua haujlwm saib xyuas MLSS txhua hnub, qhov tseem ceeb ntawm kev soj ntsuam cov kab ke "sav ntim hloov pauv".
MLVSS: Ib feem uas koom nrog cov tshuaj tiv thaiv tiag tiag
Lub npe tag nrho ntawm MLVSS yog Mixed Liquor Volatile Suspended Solids, uas txhais tau tias:
Concentration ntawm volatile suspended solids nyob rau hauv cov tov tov.
Lo lus tseem ceeb tshaj plaws ntawm no yog 'volatility'.
Nyob rau hauv siab -kub kub kub hauv chav kuaj:
Organic teeb meem yuav hlawv,
Inorganic tshuaj yuav nyob twj ywm nyob rau hauv daim ntawv ntawm tshauv.
Cov ntsiab lus ntawm cov organic teeb meem hauv cov qauv tuaj yeem kwv yees los ntawm qhov hnyav hloov ua ntej thiab tom qab hlawv.
Nyob rau hauv lub activated sludge system, feem ntau ntawm cov organic solids yog tiag tiag:
kab mob
Microbial metabolites
Organic residue
Yog li, MLVSS feem ntau suav hais tias yog sawv cev rau biomass hauv lub cev.
Yog tias MLSS tab tom saib ntau npaum li cas av nkos nyob rau hauv lub system, ces MLVSS yog ze rau saib:
Ntau npaum li cas ntawm nws tau koom nrog hauv cov tshuaj lom neeg lom neeg.
Vim li no, MLVSS feem ntau muab cov ntaub ntawv tseem ceeb dua thaum lub sij hawm kev debugging lossis kev kuaj mob.
Kev sib raug zoo ntawm MLSS thiab MLVSS
Los ntawm cov ntsiab lus txhais, ob qho tib si yog kev sib raug zoo.
Yooj yim muab, MLSS suav nrog MLVSS.
Cov organic hauv MLSS yog MLVSS, thaum seem seem yog cov khoom tsis muaj zog.
Nyob rau hauv activated sludge systems, ob qho no feem ntau muaj ib tug kuj ruaj khov piv:
MLVSS / MLSS ≈ 0.65 – 0.8
Qhov ntawd yog hais, feem ntau, txog 65% mus rau 80% ntawm cov khib nyiab tshem tawm hauv lub tank aeration yog cov organic teeb meem.
Yog hais tias qhov kev faib ua feem ntawm ib qho kev txo qis, xws li qis dua 0.5, nws feem ntau qhia tau tias muaj feem ntau ntawm cov khoom tsis zoo hauv lub cev.
Qhov xwm txheej no yuav tshwm sim hauv cov xwm txheej hauv qab no:
Cov dej nkag los muaj cov xuab zeb siab
Cov dej khib nyiab hauv kev lag luam nqa ntau cov khoom tsis zoo
Tus nqi ntawm cov tshuaj phosphorus tshem tawm ntxiv yog qhov loj
Lub hnub nyoog av nkos ntev dhau lawm
Lub sijhawm no, qhov xwm txheej yuav tshwm sim qhov twg MLSS zoo li siab, tab sis qhov system biomass tsis siab.
Uas yog hais tias, 'muaj av nkos ntau, tab sis tsawg microorganisms'.
MLSS thiab MLVSS ntsuas li cas
Kev txiav txim siab ntawm ob qhov ntsuas no yeej yog los ntawm tib txoj kev sim.
Qhov kev sim yog kwv yees muab faib ua peb kauj ruam.
Thawj kauj ruam yog lim cov qauv.
Siv ib lub ntim ntawm cov tshuaj tov, lim nws los ntawm lub lim membrane, tshem tawm cov dej, thiab tsuas yog tshem tawm cov khib nyiab.
Cov kauj ruam thib ob yog ziab ntawm 105 degree.
Qhuav lub lim membrane hauv qhov cub kom qhov hnyav tas li, thiab cov khoom hnyav tau txais hauv cov kauj ruam no yog MLSS.
Qhov thib peb theem yog siab - kub kub ntawm 550℃.
Muab cov qauv qhuav rau hauv lub qhov cub muffle thiab hlawv nws ntawm qhov kub thiab txias. Organic teeb meem yuav oxidized thiab decomposed, tsuas yog inorganic tshauv.
Qhov hnyav sib txawv ua ntej thiab tom qab hlawv yog MLVSS.
Yooj yim muab, nws txhais tau tias:
Qhov hlawv yog cov organic.
Qhov seem yog cov khoom siv inorganic.
Los ntawm txoj kev no, ob qhov ntsuas MLSS thiab MLVSS tuaj yeem tau txais ib txhij.
Yuav ua li cas nkag siab txog ob qhov ntsuas no thaum ua haujlwm
Rau cov neeg ua haujlwm cog dej phwj tuaj, ob cov ntaub ntawv no tuaj yeem nkag siab los ntawm ntau qhov kev xav.
Thaum MLSS txo qis, nws feem ntau txhais tau hais tias lub kaw lus sludge ntim tau txo qis, thiab tej zaum yuav muaj cov sludge tawm ntau dhau los yog cov sludge to los ntawm cov dej khib nyiab thib ob.
Thaum MLSS tseem nce ntxiv, nws yuav qhia tau tias tsis txaus sludge tawm thiab maj mam nce hauv lub hnub nyoog sludge.
Qhov kev hloov pauv hauv MLVSS / MLSS piv tuaj yeem cuam tshuam cov kev hloov pauv hauv cov kab ke.
Yog hais tias qhov kev faib ua feem maj mam txo qis, nws feem ntau qhia tau hais tias qhov tsub zuj zuj ntawm inorganic tshuaj nyob rau hauv lub system thiab ib tug txo nyob rau hauv feem pua ntawm cov kab mob.
Yog tias qhov kev faib ua feem tseem nyob ruaj khov nyob rau hauv qhov tsim nyog, nws qhia tau hais tias cov qauv ntawm lub cev muaj kev noj qab haus huv.
Tau kawg, hauv kev ua haujlwm tiag tiag, MLSS thiab MLVSS feem ntau yuav tsum tau txiav txim siab ua ke nrog lwm cov ntsuas, xws li:
SWV 30
Sludge settling ratio
yaj oxygen
Kev kuaj xyuas microscopic ntawm cov kab mob
Tsuas yog los ntawm kev sib txuas cov ntaub ntawv no tuaj yeem ua rau cov xwm txheej hauv lub cev muaj kev cuam tshuam ntau dua.
Hauv kev xaus
Hauv cov tshuab hluav taws xob sludge, MLSS thiab MLVSS feem ntau siv ua ke ua ob qhov ntsuas.
MLSS qhia peb tias muaj pes tsawg cov khoom raug tshem tawm hauv lub cev.
MLVSS piav qhia ntxiv tias ntau npaum li cas ntawm cov khib nyiab no yog cov organic teeb meem, uas yog, biomass.
Ntau zaus, tsuas yog saib MLSS txaus los ua kom tiav kev tswj hwm kev ua haujlwm txhua hnub. Tab sis thaum lub kaw lus ntsib qhov txawv txav, xws li kev txo qis hauv kev kho mob lossis kev puas tsuaj ntawm cov khoom sludge, MLVSS feem ntau muab ntau ntxiv hauv - cov ntaub ntawv tob.
Piv txwv li, qee lub tshuab yuav ntsib qhov xwm txheej uas MLSS yuav tsis tshwm sim qis, tab sis nws lub zog ua haujlwm poob qis.
Nyob rau ntawm lub sijhawm no, yog tias MLVSS raug kuaj pom, nws feem ntau pom tias qhov feem pua ntawm cov teeb meem organic tau txo qis, cov teeb meem inorganic maj mam tsub zuj zuj hauv lub cev, thiab cov kab mob uas koom nrog cov tshuaj tiv thaiv tiag tiag tau poob qis.
Kev nkag siab MLSS thiab MLVSS yog qhov tseeb nkag siab ib yam:
Cov sludge nyob rau hauv lub aeration tank tsis yog ib tug kab mob, tab sis ib tug complex sib tov ntawm organic thiab inorganic tshuaj.
Thaum peb tsom mus rau ob qho kev ntsuas ib txhij, peb tuaj yeem pom meej dua qhov kev hloov pauv tau tshwm sim hauv qhov system.
