Hauv cov txheej txheem kev kho dej tam sim no, cov lim dej lom neeg aerated (BAF) tau dhau los ua ib qho kev xaiv tseem ceeb rau kev kho cov dej phwj hauv nroog thiab qee cov dej khib nyiab vim lawv kev koom ua ke ntawm biodegradation thiab lub cev pom. Piv nrog rau cov txheej txheem activated sludge, cov txheej txheem BAF muaj cov hneev taw me me, kev kho mob siab, thiab ruaj khov effluent zoo. Txawm li cas los xij, kev tswj xyuas kev tshawb fawb ntawm nws cov kev ua haujlwm ncaj qha txiav txim siab txog kev kho mob thiab cov nqi khiav haujlwm. Kab lus no, sib txuas cov ntawv thov engineering thiab cov ntaub ntawv sim, tshawb xyuas cov ntsiab lus tseem ceeb ntawm BAF cov txheej txheem kev ua haujlwm thiab kev tswj hwm, tshwj xeeb tshaj yog cov ntsiab lus tseem ceeb ntawm kev thauj khoom, dej - huab cua piv, rov qab ua haujlwm, thiab kev tswj xyuas kev ua haujlwm, thiab muab cov ntaub ntawv - tsav cov ntaub ntawv los pab cov kws kho dej kom nkag siab zoo dua thiab siv cov txheej txheem no.
I. Core Parameter ntawm BAF Txheej Txheem Ua Haujlwm - Load
Hauv BAF tsim thiab kev ua haujlwm, kev thauj khoom yog qhov tseem ceeb tshaj plaws ntawm kev tswj xyuas. Ob qhov ntsuas qhov ntsuas muaj xws li hydraulic load thiab volumetric load. Volumetric load feem ntau yog BOD₅, NH₃-N, los yog NO₃-N, thiab cov hom phiaj kev khiav hauj lwm sib txawv yuav tsum muaj qhov sib txawv.
Carbonized BAFs tso cai rau qhov siab tshaj plaws ntim loading tus nqi thiab tuaj yeem tiv taus cov teeb meem organic ntau dua; nitrifying BAFs muaj cov nqi thauj khoom qis dua, thiab kev tshem tawm ammonia nitrogen cia siab rau lub sijhawm khaws cia ntev dua thiab cov khoom siv oxygen ruaj khov dua; denitrifying BAFs xav tau ntau dua hydraulic loading nqi kom tswj tau nitrogen tshem tawm efficiency. Cov txheej txheem optimization yuav tsum tau ua raws li lub hom phiaj effluent hauv engineering tej yaam num. Piv txwv li, kev ua haujlwm siab -load carbonization tuaj yeem siv rau cov dej khib nyiab feem ntau rau kev tshem tawm cov organic, thaum tshem tawm ammonia nitrogen los ntawm cov dej khib nyiab hauv nroog yuav tsum tau txo qhov ntim ntim. Tsis tas li ntawd, downflow BAFs feem ntau siv cov nqi qis dua, thaum nce BAFs tuaj yeem siv cov nqi thauj khoom ntau dua.
II. Huab cua-rau- Dej piv - Ib qho tseem ceeb cuam tshuam rau kev tshem tawm Nitrogen Efficiency
Piv nrog rau cov txheej txheem activated sludge, BAFs muaj kev hloov pauv huab cua zoo dua thiab siv cov pa oxygen ntau dua, yog li tso cai rau huab cua qis dua - rau - dej piv. Cov kev tshawb fawb pom tau hais tias tshem tawm 1 kg BOD₅ yuav tsum muaj cov pa oxygen ntawm 0.42-0.8 kg O₂. Qhov nruab nrab cov pa oxygen ntawm BAF yog kwv yees li 0.51 kg O₂ / kg BOD, deb tshaj li ntawm 1.0-1.2 kg O₂ / kg BOD ntawm cov txheej txheem activated sludge.
Rau kev ua haujlwm carbonized BAF, cov pa pa - rau - dej piv yog (3–7): 1. Yog tias kev tshem tawm ammonia nitrogen yog lub hom phiaj tseem ceeb, cov cua yuav tsum tau tshem tawm 1 kg NH₃-N yog kwv yees li 70 m³. Qhov no txhais tau hais tias BAF tuaj yeem txo qis kev siv lub zog aeration thaum ua kom muaj cov pa oxygen txaus, uas yog qhov zoo dua. Txawm li cas los xij, hauv engineering, nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias huab cua tsawg heev- rau- dej piv tuaj yeem ua rau tsis muaj oxygen hauv lub txaj lim thiab txo qis nitrification efficiency; huab cua siab heev- rau- dej piv yuav ua rau kom muaj zog noj thiab tej zaum yuav cuam tshuam rau kev ruaj ntseg ntawm lim xov xwm thiab biofilm.
III. Backwashing Intensity and Frequency - Ua kom lub txaj lim dej
Tom qab lub sijhawm ua haujlwm, lub txaj lim yuav tuaj yeem txhaws vim yog cov khib nyiab tshem tawm thiab biofilm thickening. Yog li ntawd, kev rov qab siv dua yog qhov tseem ceeb ntawm kev ua haujlwm. Tam sim no, txoj kev siv feem ntau yog ua ke cua - dej rov qab.
IV. Lwm cov teeb meem yuav tsum xav txog thaum ua haujlwm
1. SS Tswj
Txhawm rau tiv thaiv cov khib nyiab los ntawm clogging lub txaj lim, qhov muaj zog SS yuav tsum tau tswj qis dua 60-100 mg / L. Kev ntsuas ua ntej ua ntej muaj xws li sedimentation lossis flotation. Txwv tsis pub, nws yuav tsis tsuas yog ua rau kom nce siab poob rau hauv lub txaj lim tab sis kuj ua rau kom lub nra rov qab.
2. Shock Load ntawm Backwash Effluent Rov qab
Vim lub voj voog luv luv thiab kev siv rov qab siv dua, yog tias cov dej rov qab ncaj qha nkag mus rau pem hauv ntej -kawg kho, nws tuaj yeem ua rau poob siab yooj yim. Cov kev daws teeb meem muaj xws li: teeb tsa lub tank sib npaug (intermediate buffer tank) kom tsis txhob ntim dej thiab dej tsis zoo; thiab tsim nyog teem caij rov qab ntxuav lub sij hawm kom tsis txhob overlapping nrog peak influent flow.
3. Synergistic teeb meem ntawm Phosphorus tshem tawm thiab tua kab mob
Hauv kev kho mob siab heev lossis rov qab siv cov dej rov qab, BAF feem ntau siv hauv cov tshuaj phosphorus tshem tawm thiab tshuaj tua kab mob. Kev saib xyuas tshwj xeeb yuav tsum tau them rau: qhov cuam tshuam ntawm cov tshuaj lom neeg ntawm biofilm, xws li muaj peev xwm ua kom cov hlau ntau dhau los yog txhuas ntsev tuaj yeem cuam tshuam kev ua haujlwm lom neeg; thiab kev sib txuas ntawm cov txheej txheem rov qab thiab cov tshuaj tua kab mob kom tsis txhob muaj kuab paug thib ob.
Nyob rau hauv xaus, BAF (Lub Cev Fluidization) yog ib tug txheej txheem uas combines high efficiency thiab compactness, thiab tau dav siv nyob rau hauv advanced municipal wastewater kho mob, industrial wastewater kho mob, thiab reclaimed dej siv. Txawm li cas los xij, nws tsis yog "panacea." Nws qhov kev ua tau zoo tshaj plaws tsuas yog tuaj yeem ua tiav los ntawm qhov chaw- kev tswj tshwj xeeb thiab ua kom zoo hauv kev ua haujlwm thiab kev tswj hwm. Load tswj txiav txim seb cov hom phiaj kho puas tuaj yeem ua tiav; huab cua-rau- kev hloov pauv dej muaj feem xyuam rau kev siv zog thiab kev tshem tawm nitrogen; backwashing yog lub hauv paus ntawm kev tswj xyuas ntev - lub sijhawm ua haujlwm ruaj khov; thiab SS (suspended solids) thiab kev tswj dej xa rov qab yog "cov xwm txheej zais cia" los ua kom muaj kev noj qab haus huv ntawm lub cev. Nyob rau hauv lub neej yav tom ntej, nrog rau kev txhim kho ntawm ntse dej tswj thiab automated tswj technologies, kev khiav hauj lwm thiab kev tswj ntawm BAF yuav ua kom zoo dua thiab txawj ntse, thiab nws lub luag hauj lwm nyob rau hauv ntsuab thiab qis - cov pa roj carbon dej kho tshuab yuav ua ib qho tseem ceeb zuj zus.
