Kunshan Jianbei WWTP MBBR Hloov Kho: 196,000 m³ / hnub Case Study

Nyob rau hauv Kunshan, Jiangsu Province, Jianbei North District Wastewater Treatment Plant sawv ua ib qho ntawm Tuam Tshoj qhov loj tshaj plaws ib nrab -cov chaw kho dej khib nyiab hauv nroog. Nrog rau tag nrho cov kev kho mob muaj peev xwm ntawm196,000 tons / hnubUa haujlwm kwv yees li ntawm 560,000 tus neeg nyob hauv, cov nroj tsuag tau ua tiav ib qho chaw MBBR (tsav txaj Biofilm Reactor) txhim kho nyob rau plaub theem kev tsim kho 16 xyoo. Qhov kev tshawb fawb no tshuaj xyuas cov tswv yim rov qab ua dua tshiab, kev teeb tsa txheej txheem, thiab cov txiaj ntsig kev ua haujlwm uas ua kom cov dej ntws zoo los ntawmChav Kawm Amus rau qhov nrujClass IV Surface Water Standard.

Tsob Ntoo Txheej Txheem

Lub Kunshan Jianbei North District Wastewater Treatment Plant kho tshwj xeebmunicipal wastewater thiab dej phwj hauv tsev, ua rau nws yog ib qho tseem ceeb ntawm lub cheeb tsam ib puag ncig infrastructure. Lub chaw occupies ib thaj av tag nrho ntawm kwv yees li115km wbnyob rau hauv Kunshan lub nroog catchment. Cov txheej txheem kho tseem ceeb ua kepretreatment + hloov kho AAO (Anaerobic-Anoxic-Oxic) Txheej txheem nrog MBBR + siab-efficiency sedimentation + V- hom pom + UV tshuaj tua kab mob, sawv cev rau ntau-txoj kev mus kom ze rau kev ua kom huv cov dej khib nyiab siab heev.

Kev kho effluent yog tawm mus rau anatural txais dej lub cev (dej), uas ua rau nruj ecological yuav tsum tau tshem tawm cov as-ham - tshwj xeeb tshaj yog rau ammonia nitrogen thiab tag nrho phosphorus - los tiv thaiv eutrophication nyob rau hauv downstream dej ib puag ncig.

Kunshan Jianbei North District WWTP - ib qho ntawm Tuam Tshoj qhov loj tshaj plaws semi-cov chaw kho mob hauv nroog

Plaub -Phase Expansion History

Cov nroj tsuag txoj kev loj hlob nthuav dav tshaj plaub theem kev tsim kho loj, txhua qhov kev nthuav dav ntxiv thaum sib txuas nrog cov thev naus laus zis kho tshiab:

Theem I - Thawj Tswj Hwm (2005)

Thawj theem tsim ib50,000 tons / hnublub hauv paus muaj peev xwm. Kev tsim kho tau ua tiav thaum Lub Ib Hlis 2005, nrog kev lag luam pib thaum Lub Yim Hli ntawm tib lub xyoo. Cov theem no tau tsim cov hauv paus ntsiab lus nrog cov chav kho mob ib txwm tsim los ua kom tau raws li- cov qauv kev tso tawm Class A.

Theem II - Kev nthuav dav thiab kev kho mob siab heev nrog MBBR (2009)

Phase II ntxiv ntxiv50,000 tons / hnubntawm lub peev xwm thiab, tseem ceeb, qhiaMBBR technologytxhawm rau txhim kho cov khoom noj khoom haus lom neeg tshem tawm. Kev lag luam pib thaum Lub Yim Hli 2009, kos npe rau cov nroj tsuag thawj zaug xa cov khoom siv biofilm - raws li kev kho mob. Cov theem no tau pom tias muaj kev lees paub thaum ntxov uas tau tshem tawm - kev loj hlob activated sludge ib leeg yuav tsis txaus kom ua tau raws li cov kev xav tau ntawm kev hloov pauv.

Theem III - Ib nrab-Kev nthuav dav hauv av (2016)

Ntxiv48,000 tons / hnub, Phase III saws asemi- kev tsim kho hauv avtsim - ib txoj hauv kev uas txo qhov pom kev cuam tshuam, txo cov ntxhiab tsw emissions, thiab txuag thaj av rau hauv zej zog siv. Lub sijhawm dhau los lees paub rau lub Kaum Ob Hlis 13, 2016.

Theem IV - Kunshan Thawj Ib Ntu -Underground WWTP (2019)

Qhov thib plaub thiab zaum kawg nthuav ntxiv ntxiv48,000 tons / hnub, nqa cov nroj tsuag mus rau nws tam sim no tag nrho ntawm196,000 tons / hnub. Raws li Kunshan thawj zaug tag nrho ib nrab- WWTP ntu hauv av, nws dhau qhov kev lees paub thaum lub Tsib Hlis 23, 2019, ua qhov ua ntej rau yav tom ntej hauv nroog cov dej khib nyiab hauv cheeb tsam Yangtze River Delta.

Cog layout daim duab qhia txog ntau-phase expansion thiab txheej txheem chav tsev

Kev Txhim Kho & Rov Kho Dua: Chav Kawm A rau Chav Kawm IV Nto Dej Txheem (2020-2021)

Qhov kev hloov pauv tseem ceeb tshaj plaws tau pib hauvCuaj hlis 2020thiab mus txog ua tiav hauvLub Ib Hlis 2021. Txoj kev txhim kho thiab kho kom zoo dua qub tau txhawb nqa cov nroj tsuag tus qauv tso tawm los ntawmClass A ntawm Nroog WWTP Standardmus rau qhov xav tau ntau duaQuasi-Class IV Surface Water Standard. Ua kom tiav qhov no yuav tsum muaj kev rov ua haujlwm dua -kev tsim kho ntawm cov txheej txheem biochemical kho mob - AAO-MBBR reactors.

MBBR Biochemical Tank: Xya qhov kev txhim kho tseem ceeb

Lub tank biochemical rectangular yog lub focal point ntawm retrofit. Nrog rau qhov muaj txiaj ntsig COD feem ntau dhau100 mg / L, qhov kev hloov kho tshiab tau ua tiav COD cov dej ntws tsis tu ncua hauv qab no20 mg/l- kev tshem tawm tau tshaj 80%. Xya lub hom phiaj txhim kho tau ua tiav:

1. MBBR19 Biofilm Carrier Media

Cov nroj tsuag xaivMBBR19carriers, tsim los ntawm100% nkauj xwb HDPEhauv dub. Lub cylindrical carrier geometry nta ib tug ntoo khaub lig sab hauv - qauv thiab tiv thaiv thaj chaw optimized rau biofilm txuas thaum tuav tswj zoo heev fluidization yam ntxwv. Virgin HDPE ua kom cov tshuaj inertness, UV tsis kam, thiab kev pabcuam lub neej ntev tshaj 10 xyoo nyob rau hauv kev ua haujlwm tas mus li - qhov tseem ceeb rau qhov chaw ntawm qhov ntsuas no uas hloov xov xwm yuav cuam tshuam nrog kev poob qis thiab tus nqi.

MBBR19 carrier media - 100% nkauj xwb HDPE, engineered rau siab biofilm ntom thiab ntev kev pab cuam lub neej

2. Inlet Flow Distribution Optimization

Ib qho tseem ceeb hydraulic hloov pauv hloov lub inlet configuration los ntawm adav -sab yeeb nkab inletrau antev - sab overflow weir inlet. Qhov kev hloov pauv me me no ua rau muaj txiaj ntsig zoo rau kev ua haujlwm: nws ua kom zoo tshaj qhov kev faib tawm thoob plaws lub tank hla -section, tshem tawm luv luv -circuiting thiab tuag aav, txhim kho MBBR cov cab kuj fluidization uniformity, thiab txhim kho lub tank tiv thaiv hydraulic thiab organic shock loads. Uniform flow tis yog ib qho yuav tsum tau ua ua ntej rau kev ua tau zoo ntawm biofilm - qhov chaw tuag ua rau cov khoom thauj mus los thiab txo cov khoom siv hluav taws xob zoo.

Ntev - sab overflow weir inlet hloov kho - tshem tawm cov chaw tuag thiab txhim kho cov kua dej ua kua

3. Outlet Media Retention Screens

Muab siab rauMBBR tuav cov ntxaij vab tshaustau nruab rau ntawm lub qhov hluav taws xob reactor los tiv thaiv cov neeg nqa khoom tawm ntawm kev khiav mus rau cov chaw kho mob hauv qab. Kev tsim qauv yog qhov tseem ceeb: kev txhaws ntau dhau ua rau lub taub hau poob thiab kev saib xyuas zaus, thaum kev tshuaj ntsuam tsis txaus tso cai rau kev tawm xov xwm uas txo cov khoom lag luam biomass zoo thiab muaj kev pheej hmoo txhaws cov khoom siv hauv qab. Stainless hlau wedge-cov ntxaij vab tshaus ntawm Kunshan yog qhov loj los khaws MBBR19 cov neeg nqa khoom thaum tuav cov khoom siv hydraulic.

Stainless hlau MBBR qhov hluav taws xob tuav cov ntxaij vab tshaus - tiv thaiv cov khoom thauj khoom poob

4. Carrier Fill Ratio

Lub retrofit ua hauj lwm a10-15% kev sib piv(carrier ntim raws li feem pua ​​​​ntawm cov reactor zoo ntim), uas yog qhov tshwj xeeb rau kev saib xyuas rau MBBR retrofit. Nyob rau hauv greenfield MBBR designs, sau piv ntawm 30-55% yog ntau, tab sis retrofit tej yaam num yuav tsum sib npaug zog kho peev xwm tiv thaiv uas twb muaj lawm tank geometry, aeration muaj peev xwm, thiab sib tov zog. Qhov 10-15% sau piv ntawm Kunshan tau ua tiav qhov kev txhim kho effluent uas yuav tsum tau ua kom tsis pub dhau lub hydraulic thiab aeration txwv ntawm cov txheej txheem uas twb muaj lawm - pragmatic, nqi-txoj kev zoo rau brownfield MBBR kev koom ua ke.

5. Ua ke Fine thiab ntxhib npuas Aeration

Lub aeration system ntiav adual{0}}mode configurationcombining zoo npuas disc diffusers thiab ntxhib npuas aeration hose:

Fine npuas aeration(disc diffusers) ua hauj lwm ob lub hom phiaj ntawm MBBR cov cab kuj fluidization thiab yaj oxygen mov rau microbial metabolism. Cov npuas zoo muab cov pa oxygen ntau dua (OTE), feem ntau yog 4.5–6.5% ib meter ntawm submergence, ua rau lawv lub zog -cov pob txha zoo ntawm kev kho mob lom.

Coarse npuas aeration(aeration hose) pab cov neeg nqa khoom fluidization nyob rau hauv cov cheeb tsam uas zoo npuas lub zog ib leeg tej zaum yuav tsis txaus los tswj cov txheej txheem kev ncua. Cov npuas npuas ua rau muaj zog turbulence thiab sib tov qauv, tiv thaiv cov cab kuj stratification thiab kom ntseeg tau tias zoo ib yam biofilm - dej khib nyiab sib cuag thoob plaws hauv lub reactor ntim. Qhov no hybrid aeration lub tswv yim sib npaug cov pa oxygen hloov mus rau qhov kev xav tau ntawm cov neeg nqa khoom ncua sij hawm - ib qho tseem ceeb tsim kev txiav txim siab rau loj - tank MBBR systems uas cov kua dej tsis sib xws yog qhov nyuaj dua li hauv cov reactors compact.

Hybrid nplua thiab ntxhib npuas aeration system - ntsuas cov pa xa mus nrog cov kua dej ua kua

6. Ua npuas ncauj tswj raws tu qauv

Lub teeb nto ua npuas ncauj tau lees paub tias yog ib qhoib txwm biochemical phenomenonua los ntawm microbial metabolism thiab extracellular polymeric khoom (EPS) ntau lawm hauv biofilm. Cov nroj tsuag ua haujlwm nrog cov txheej txheem kev soj ntsuam ua npuas ncauj: lub teeb, ua npuas ncauj tsis tas yuav tsum muaj kev cuam tshuam los ntawm phau ntawv. Kev tshawb nrhiav thiab kev kho kom raug tsuas yog tshwm sim thaumua npuas ncauj ntau dhau, dhau lawm, los yog ntxhiab tsw txawv txavtau soj ntsuam - cov cim qhia txog qhov muaj peev xwm ua rau muaj kev cuam tshuam kev poob siab, sludge aging, lossis organic overload tej yam kev mob uas lav kev ua haujlwm hloov.

7. Tank Phab Ntsa Hnav Tiv Thaiv

Ntev-Lub sijhawm MBBR kev ua haujlwm cuam tshuam nrog kev sib txuas ua ke ntawm cov kua dej txuas ntxiv thiab kev sib tsoo nrog cov phab ntsa tank - ib qho kev hnav tsoos tsho tshwj xeeb rau MBBR systems. Kunshan cog siv akev soj ntsuam niaj hnubnpog los tiv thaiv- coatings coatings, aeration cov cuab yeej ncaj ncees, thiab tuav cov tshuaj ntsuam xyuas. Kev kho kom ruaj khov thiab teem caij hloov ntawm cov khoom hnav tiv thaiv lub sijhawm tsis tau npaj tseg thiab ua kom muaj kev ncaj ncees. Qhov no yog ib qho kev saib xyuas tsis tu ncua ntawm MBBR kev ua haujlwm uas cuam tshuam ncaj qha rau lub neej ntev - lub neej khoom vaj khoom tsev.

WWTP Configuration Types: A Comparative Perspective

Lub Kunshan cog qhov kev hloov pauv los ntawm cov pa hluav taws xob sludge los ntawm ntau qhov kev teeb tsa muab kev pom muaj txiaj ntsig rau hauv kev npaj kho dej khib nyiab. Lub semi- qauv tsim hauv av tau txais nyob rau hauv Phase III thiab IV sawv cev rau kev loj hlob hauv nroog Tuam Tshoj, qhov chaw av- siv lub siab thiab cov ntxhiab tsw hauv zej zog muaj kev txhawj xeeb ntau ntxiv rau kev xaiv kev tsim vaj tsev.

Kev sib piv ntawm WWTP configuration hom - saum toj no - hauv av, semi- hauv av, thiab hauv av tag nrho

Qhov tseem ceeb Takeaways rau MBBR Retrofit Projects

Lub Kunshan Jianbei North District WWTP qhia tau tiasloj -scale MBBR retrofit yog ob qho tib si technically ua tau thiab kev siv nyiaj txiag, txawm tias muaj peev xwm nce mus txog 200,000 tons / hnub. 16-xyoo, plaub-theem kev txhim kho txoj hauv kev tau tso cai rau cov nroj tsuag tuaj yeem ntxiv cov cuab yeej kho mob siab heev thaum tswj kev ua haujlwm tas mus li - tus qauv tsim nyog rau kev kawm rau hauv nroog ntsib cov teeb meem kev txhim kho zoo sib xws. Qhov kev vam meej nce los ntawm Chav Kawm A mus rau Chav Kawm IV Ntog Dej cov qauv, ua tiav nrog kev saib xyuas 10-15% MBBR sau piv, qhia txog qhov ua tau zoo ntawm kev ua haujlwm zoo ntawm biofilm carrier kev koom ua ke hauv AAO infrastructure uas twb muaj lawm.

Cov ntaub ntawv siv & Cov ntaub ntawv

Daim ntawv qhia txog qhov chaw mus ntsib, Kunshan Jianbei North District Wastewater Treatment Plant, Lub Rau Hli 2026. Cov ntaub ntawv cog lus ua haujlwm thiab cov qauv tsim tau raug txheeb xyuas thaum lub sij hawm ntawm - tshuaj xyuas qhov chaw. Kev sib piv tus qauv pov thawj tau los ntawm Tuam Tshoj Lub Nroog WWTP Cov Khoom Siv Hluav Taws Xob Hluav Taws Xob (GB 18918-2002) thiab Nto Dej Environmental Quality Standard (GB 3838-2002).