AAO Oxidation Ditch + MBBR Hloov Kho: Yuav ua li cas 40,000 m³ / d Guangdong Cog Ntaus Chav Kawm 1A ntawm 0.219 RMB / m³

Kev txhim kho cov dej khib nyiab hauv nroog los ntawm Chav Kawm 1B mus rau Chav Kawm 1A tsis yog cov ntaub ntawv ua haujlwm - nws yog qhov teeb meem hydraulic, lom, thiab nyiaj txiag dov rau hauv ib qho. Thaum 40,000 m³ / d tsob nroj hauv Guangdong ntsib txoj haujlwm no, nws qhov AAO oxidation ditch uas twb muaj lawm twb muaj peev xwm puv. Cov cheeb tsam anoxic thiab aerobic tsis muaj kev sib cais ntawm lub cev. Cov khoom sib tov ua tsis tiav. Diffusers tau txhaws. Thiab qhov cuam tshuam C / N piv tau qis dhau los tsav denitrification ntseeg tau. Cov ntaub ntawv kawm no taug kev los ntawm seb pawg neeg ua haujlwm tau soj ntsuam MBBR tiv thaiv BAF, xaiv txoj hauv kev rov ua haujlwm dua, thiab xa cov khoom siv hauv chav kawm 1A ntawm tus nqi ua haujlwm ntxiv ntawm 0.219 RMB ib cubic meter.

Kev Sib Tw

Ib qho Overloaded Oxidation Ditch ntawm Tag Nrho Peev Xwm

Cov nroj tsuag, nrog lub peev xwm tsim ntawm 40,000 m³ / d, tau khiav ze ntawm - tag nrho cov hydraulic load thaum lub sij hawm tso tawm tuaj txog. Cov txheej txheem qub yog ib qho A/A/O oxidation ditch tawm ntawm Chav Kawm 1B cov qauv - txaus rau nws lub sijhawm, tab sis undersized thiab hauv qab - teeb tsa rau cov kev txwv nruj dua tom ntej.

Pab pawg ua haujlwm tau txheeb xyuas tsib qhov tsis txaus ntseeg thaum lub sijhawm kuaj mob:

Lub sijhawm khaws cia tsis txaus.Lub tank ntim uas twb muaj lawm tsis tuaj yeem txhawb nqa lub sijhawm tuav hydraulic uas yuav tsum tau muaj rau kev txhim khu kev qha nitrification thiab denitrification raws li Chav Kawm 1A chaw thau khoom.

Kev sib cais tsis zoo.Tsis muaj kev faib phab ntsa nyob nruab nrab ntawm thaj chaw anoxic thiab aerobic, thiab tsis muaj nitrate recirculation tswj rooj vag. Cov cawv sib xyaw rov qab-kev sib xyaw tsis muaj kev tswj hwm, diluting thaj chaw anoxic nrog cov pa oxygen yaj thiab ua kom tsis muaj zog denitrification efficiency.

Mixer ua tsis tiav.Cov khoom siv submersible uas twb muaj lawm tau undersized rau txoj hauj lwm thiab tau ua tsis tiav nyob rau hauv siab sludge concentrations mus txog 10 g / L, tawm hauv qhov chaw tuag qhov twg cov khib nyiab sau thiab tig septic.

Tshaj DO hauv thaj chaw anoxic.Tsis muaj kev sib cais ntawm lub cev thiab nrog cov khoom sib xyaw ua tsis tiav, cov pa oxygen yaj los ntawm thaj chaw aerobic los mus rau hauv thaj chaw anoxic, tshem tawm cov kab mob denitrifying thiab nkim cov pa roj carbon tsawg.

Clogged aeration diffusers thiab qis C / N piv.Ntau xyoo ntawm kev ua haujlwm tau ua phem rau qhov zoo - npuas diffusers, txo cov pa oxygen hloov pauv. Cov dej khib nyiab tuaj tau muaj cov pa roj carbon tsawg hauv qhov tseeb- rau- nitrogen piv, tawm hauv cov organic substrate tsis txaus rau roj denitrification txawm tias lwm yam kev mob zoo.

Kev xaiv txheej txheem

MBBR vs. BAF: Ib qho piv txwv

Pab pawg ua haujlwm tau tshuaj xyuas ob lub biofilm-raws li txoj hauv kev txhim kho: Moving Bed Biofilm Reactor (MBBR) thiab Biological Aerated Filter (BAF). Ob leeg tuaj yeem ua tau raws li qhov xav tau ntawm Chav Kawm 1A effluent, tab sis kev ua lag luam tawm tswv yim - tawm hauv cov ntsiab lus retrofit tau txiav txim siab.

Qhov kev ntsuam xyuas tau xaus lus txiav txim siab rauMBBR. Kev muaj peev xwm rov ua dua tshiab rau hauv qhov oxidation ditch uas twb muaj lawm yam tsis tau txais av ntxiv yog tus tsav tsheb, kev txhawb nqa los ntawm cov peev nyiaj qis thiab cov nqi khiav lag luam thiab kev ua haujlwm yooj yim uas pab pawg cog hauv nroog tuaj yeem tswj hwm nrog tsawg retraining.

Tsim Parameters

Cov yam ntxwv muaj zog thiab tso tawm cov hom phiaj

Tus tsim muaj peev xwm thiab lub hom phiaj effluent zoo tau raug ntsuas tawm tsam qhov kev txwv nruj dua ntawm DB 44/26-2001 (Guangdong Provincial Standard) thiab GB 18918-2002 Chav Kawm 1A (National Standard). Tag nrho cov nqi hauv mg / L tshwj tsis yog sau tseg.

Txheej Txheem Flow

Kev kho tsheb ciav hlau kho dua tshiab

Cov txheej txheem kev hloov kho tshiab txuas nrog cov retrofitted AAO-MBBR oxidation ditch nrog cov chav kho mob tshiab kom tau raws li qhov nruj SS thiab TP txwv ntawm Chav Kawm 1A:

Inlet → Fine Screen (3 hli) → AAO-MBBR Oxidation Ditch → Secondary Clarifier → Lift chaw nres tsheb → High -Efficiency Sedimentation Tank → Fiber Disc Filter → UV Disinfection → Qhov hluav taws xob

AAO-MBBR Retrofit Paub meej

Ob Txoj Kev Sib Tw, Txhua qhov ntawm 20,000 m³ / d

Lub retrofit tsom ob qho tib si oxidation ditches nyob rau hauv parallel, txhua tus tuav ib nrab ntawm tus tsim ntws. Cov kev hloov pauv tseem ceeb tau raws li hauv qab no.

Anoxic cheeb tsam (6,792 m³).Rebuilt internal guide walls are installed to create a physically cais anoxic compartment, tiv thaiv DO rov qab -sib tov los ntawm aerobic cheeb tsam. Tshiab submersible mixers tau qhov loj me los tswj cov khib nyiab tshem tawm ntawm cov cawv sib xyaw ua ke txog li 10 g / L, tshem tawm cov chaw tuag uas plagued cov txheej txheem qub.

Aerobic cheeb tsam nrog MBBR nqa (14,297 m³).Cov seem aerobic tau muab faib ua ib qho chaw ua haujlwm sludge thiab thaj chaw MBBR siab ntawm 4,980 m³. Cov neeg nqa khoom biofilm muab tag nrho thaj chaw zoo ntawm 4.987 x 10&sup5; m² rau txuas microbial kev loj hlob, ua rau kom cov khoom lag luam biomass tsis tau nthuav dav tank ntim.

Carrier specifications.High-cov neeg nqa khoom ntom ntom polyethylene (HDPE) nrog thaj chaw tshwj xeeb ntawm Ntau dua lossis sib npaug li 800 m² / m³ raug xaiv. Tag nrho cov neeg nqa khoom ntim yog 209 m³, yielding ib qho piv txwv ntawm kwv yees li 12.5% ​​- tshwj xeeb, pab pawg ua haujlwm tau hais tias qhov sib piv tsis yog thawj qhov qauv tsim; qhov yuav tsum tau biofilm nto cheeb tsam dictated cov cab kuj kom muaj nuj nqis, thiab 12.5% ​​yog tus nqi tshwm sim.

Retention screens.Stainless hlau wedge-cov ntxaij vab tshaus hlau tau teeb tsa ntawm ob lub qhov nkag thiab qhov hluav taws xob ntawm MBBR cheeb tsam kom khaws cov neeg nqa khoom nyob rau hauv qhov chaw xaiv thaum tso cai pub dawb ntawm cov cawv sib xyaw thiab cov khib nyiab tshem tawm.

Nitrate recirculation twj tso kua mis.Tshiab recirculation twj tso kua mis ntsuas ntawm Q=833.4 m³ / h rov qab nitrate-nplua nuj sib xyaw cawv los ntawm thaj chaw aerobic rov qab mus rau thaj chaw anoxic, tsav tsheb denitrification ntawm kev tswj kev rov ua haujlwm.

Aeration upgrade.Thawj lub tshuab tshuab tau hloov nrog ob lub zog 152 kW, txhua qhov xa tawm 115 m³ / min ntawm lub tshuab cua tsim - rau - dej piv ntawm 7:1 - ib qho tseem ceeb nce los ntawm qhov piv ntawm 5: 1, uas qhia txog qhov xav tau oxygen siab dua ntawm nitrifying biofilm system.

New Tertiary Treatment Units

Polishing rau Chav Kawm 1A SS thiab TP Ua Raws Cai

Kev kho mob lom neeg ib leeg tsis tuaj yeem ntseeg siab ua tiav 10 mg / L SS thiab 0.5 mg / L TP txwv ntawm Chav Kawm 1A. Peb downstream polishing units tau ntxiv.

High -Efficiency Sedimentation Tank.Ob chav nyob sib npaug, txhua qhov ntsuas ntawm 833.34 m³ / h, nrog rau qhov chaw thauj khoom ntawm 8.17 m³ / m²·h. PAC (polyaluminum chloride) thiab PAM (polyacrylamide) yog txhaj rau tshuaj phosphorus tshem tawm thiab flocculation, tsom rau TP thiab seem SS.

Fiber Disc Filter.Ob chav nyob, txhua qhov muaj 12 discs ntawm 3,000 mm txoj kab uas hla, muab qhov pom ntawm 5.6 txog 7.8 m³ / h·m². Plaub lub twj tso kua mis rov qab tau teeb tsa rau kev siv xov xwm tsis siv neeg. Lub disc lim yog qhov kawg ntawm lub cev thaiv rau cov khoom raug tshem tawm ua ntej tshuaj tua kab mob.

UV Disinfection.33.22 kW ultraviolet system nrog 96 teeb ntawm 320W txhua, tsim los rau lub ncov ntws ntawm 56,400 m³ / d. UV raug xaiv dhau chlorination kom tsis txhob muaj tshuaj tua kab mob los ntawm cov khoom tsim thiab cov tshuaj chlorine residual toxicity hauv cov dej tau txais.

Kev nqis peev thiab kev ua haujlwm

Capital Breakdown thiab Nqi ib Cubic Meter

Tag nrho qhov project peev yog32.14 lab RMB, faib raws li hauv qab no:

Tus nqi ua haujlwm nce ntxiv ntawm kev txhim kho tau suav nrog0.219 RMB/m³, txhais mus rau kwv yees li 3.20 lab RMB ib xyoo ntawm kev tsim ntws. Kev tawg yog raws li nram no:

Ntsiab Cai

Tsib Zaj Lus Qhia rau Oxidation Ditch Retrofits

1. MBBR haum rau oxidation ditches uas twb muaj lawm nrog kev ua haujlwm tsawg tsawg.Lub Guangdong retrofit yuav tsum tsis muaj kev tsim kho lub tank tshiab rau cov theem lom neeg - cov cab kuj, cov ntxaij vab tshaus, cov khoom sib tov, thiab cov tshuab tshuab tau nruab rau hauv cov ko taw uas twb muaj lawm. Qhov no ib leeg ua rau MBBR qhov kev xaiv nyiaj txiag zoo tshaj BAF.

2. Fill ratio yog ib qho kev tso zis, tsis yog kev tawm tswv yim.Pab neeg tsim qauv tau hais txog qhov no: qhov xav tau ntawm thaj chaw biofilm - suav los ntawm kev thauj khoom nitrogen thiab lub hom phiaj nitrification tus nqi - txiav txim siab yuav tsum muaj pes tsawg tus neeg nqa khoom. Qhov sib piv sau (12.5% ​​hauv qhov no) yog dab tsi uas tus neeg nqa khoom ntim ua haujlwm tawm. Tsis txhob pib nrog ib tug arbitrary sau feem pua.

3. Downstream polishing yog qhov tseem ceeb rau Chav Kawm 1A.Txawm tias ib lub qhov dej -tsim MBBR tuaj yeem tso siab tau 10 mg / L SS thiab 0.5 mg / L TP yam tsis muaj kev kho mob tertiary. Lub siab -efficiency sedimentation tank thiab fiber ntau disc lim tsis muaj kev xaiv ntxiv - lawv yog qhov sib txawv ntawm kev ua raws cai thiab tsis ua haujlwm ntawm SS thiab phosphorus.

4. Tus nqi ntxiv yog me ntsis txheeb ze rau kev hloov kho tus qauv.Ntawm 0.219 RMB/m³, tus nqi ua haujlwm nce ntxiv ntawm Chav Kawm 1B-rau-1A hloov dua siab tshiab sawv cev rau tus nqi tsim nyog. Cov nqi tshuaj (0.048 RMB / m³) thiab sludge tuav (0.041 RMB / m³) yog cov khoom tseem ceeb, thiab ob qho tib si kuj kwv yees.

5. Aeration hloov dua tshiab feem ntau tsim nyog.Kev hloov ntawm 5: 1 mus rau 7: 1 huab cua- mus rau - dej piv qhia txog qhov xav tau oxygen ntxiv ntawm nitrifying biofilm system. Cov nroj tsuag xav txog MBBR retrofits yuav tsum tau siv nyiaj rau kev hloov pauv los yog augmentation - lub tshuab aeration uas twb muaj lawm yuav tsis zoo txaus.

Xaus

Cov ntaub ntawv Guangdong qhia tau hais tias kev sib xyaw ua ke ntawmAAO-MBBR nrog siab-kev ua haujlwm zoo sedimentation thiab fiber ntau disc pommuab kev ua haujlwm tau zoo, muaj txiaj ntsig zoo, thiab ua haujlwm tau zoo txhim kho txoj hauv kev los ntawm Chav Kawm 1B mus rau Chav Kawm 1A. Txoj kev rov kho dua tshiab - rov siv lub tank ntim uas twb muaj lawm, ntxiv cov nqa khoom es tsis yog cov pob zeb, thiab txheej txheej txheej txheej txheej polishing downstream - muab cov khoom pov tseg uas yuav tsum tau muaj ntawm tus nqi nce ntxiv uas cov peev nyiaj hauv nroog tuaj yeem nqus tau. Rau kev loj hlob ntawm Suav cov nroj tsuag hauv nroog ntsib tib 1B- rau-1A txoj haujlwm, tus qauv no lav qhov kev txiav txim siab loj.