I. Simultaneous Nitrogen thiab Phosphorus Tshem Tawm hauv SBR txheej txheem
Thaum lub sijhawm ua haujlwm, cov txheej txheem SBR tuaj yeem ua tiav ib txhij tshem tawm nitrogen thiab phosphorus hauv tib lub tank los ntawm kev kho lub sijhawm faib thiab ib puag ncig (xws li aeration rate thiab stirring status) ntawm txhua theem. Tshwj xeeb, nws tsim kev hloov pauv aerobic, anoxic, thiab anaerobic ib puag ncig ntawm cov haujlwm sib txawv kom tau raws li cov kev xav tau ntawm cov kab mob sib txawv ntawm cov zej zog microbial.
Kev khiav hauj lwm hom: Anaerobic → Aerobic → Anoxic (los yog flexibly ua ke raws li kev xav tau)
Los ntawm lub sij hawm -series tswj, phosphorus tso tawm yog tiav nyob rau hauv lub anaerobic theem, nitrification thiab tshaj phosphorus uptake yog ua tiav nyob rau hauv lub aerobic theem, thiab denitrification yog tiav nyob rau hauv lub anoxic theem.
II. Qhov tseem ceeb cuam tshuam txog kev tshem tawm ib txhij Nitrogen thiab Phosphorus
1. Influent Organic Matter Concentration
Organic teeb meem nyob rau hauv lub influent yog ib qho tseem ceeb carbon qhov chaw rau polyphosphate -accumulating kab mob thiab denitrifying kab mob. Muaj cov pa roj carbon kev sib tw ntawm polyphosphate- cov kab mob sib xyaw thiab cov kab mob denitrifying. Yog hais tias lub influent organic teeb meem concentration tsis txaus, nws yuav ncaj qha cuam tshuam rau cov nitrogen thiab phosphorus tshem tawm efficiency. Yog li, qhov tsim nyog carbon qhov piv yog qhov tseem ceeb rau kev ua tiav ntawm kev tshem tawm nitrogen thiab phosphorus ib txhij.
2. Aeration Rate thiab Dissolved Oxygen (DO)
Dissolved oxygen concentration ncaj qha cuam tshuam rau nitrogen thiab phosphorus tshem tawm efficiency. Denitrification yuav tsum muaj cov kab mob anoxic nrog DO <0.5 mg / L; Cov pa oxygen ntau dhau ua rau muaj kev ua haujlwm ntawm cov kab mob denitrifying. Nyob rau tib lub sijhawm, cov pa oxygen txaus yuav tsum tau khaws cia thaum lub sij hawm aerobic kom ntseeg tau tias kev ua tiav tag nrho ntawm nitrification. Yog li ntawd, kev tswj kom meej ntawm aeration tus nqi thiab yaj cov pa oxygen yog qhov tseem ceeb heev.
3. Tus nqi pH
Lub cev pH tus nqi cuam tshuam cuam tshuam rau lom phosphorus tshem tawm efficiency. Cov kev tshawb fawb tau pom tias thaum pH > 8, phosphorus tso tawm los ntawm polyphosphate- cov kab mob sib sau ua ke (PAOs) txo qis, cuam tshuam rau cov phosphorus uptake ntau dhau hauv cov theem tom ntej aerobic. Yog li ntawd, tus nqi pH yuav tsum tau tswj nyob rau hauv ib qho chaw tsim nyog thaum ua haujlwm.
4. Sludge Retention Time (SRT)
Nitrifying kab mob muaj lub voj voog ntev thiab xav tau lub sijhawm khaws cia ntev ntev; thaum PAOs xav tau lub sijhawm luv dua sludge tuav kom ua tiav cov phosphorus zoo dua. Muaj kev lag luam - tawm ntawm nitrification thiab phosphorus tshem tawm; Feem ntau, SRT yuav tsum tau tswj xyuas nyob ib ncig ntawm 10 hnub txhawm rau nrhiav qhov pom kev sib npaug ntawm ob.
III. Sib piv cov txheej txheem SBR thiab Nruam Flow Activated Sludge Process
Qhov zoo ntawm SBR txheej txheem
1. Tsis tas yuav tsum muaj dej sib npaug ntawm lub tank, lub tank thib ob, thiab sludge rov qab twj tso kua mis; yooj yim txheej txheem ntws.
2. Cov dej ntws zoo yog qhov zoo dua li cov txheej txheem activated sludge, thiab cov dej zoo ruaj khov dua.
3. Compact qauv, me me hneev taw.
4. Muaj zog tsis kam thauj khoom hloov pauv, ua tiav cov txiaj ntsig zoo purification.
5. Tsawg infrastructure peev.
6. Yooj yim tswj sludge bulking
Disadvantages ntawm SBR txheej txheem
1. Kev ua haujlwm tsis yooj yim, kev xav tau siab rau automation thiab cov neeg ua haujlwm kev txawj ntse.
2. Cov cuab yeej siv tsawg tsawg, nce cov nqi khoom siv thiab kev teeb tsa muaj peev xwm.
3. Lub voj voog ua haujlwm ntev, lub tank ntim loj thiab cov khoom siv dej.
4. Tsis yooj yim kom ua tau raws li qhov yuav tsum tau ua ntawm kev kho dej tsis tu ncua thiab cov dej ntws tsis tu ncua hauv loj - cov dej khib nyiab loj.
5. Kev hloov pauv ntawm cov dej loj, lub taub hau loj.
IV. Zuag qhia tag nrho cov yam ntxwv ntawm SBR txheej txheem
(1) Kev hloov pauv lom neeg thiab khoom noj khoom haus -Kev sib cais ntawm cov kuab paug hauv cov dej khib nyiab tau ua tiav hauv ib lub tank tshuaj tiv thaiv lossis ntau lub tank sib txuas;
(2) Lub ntim ntawm cov sludge- dej sib tov nyob rau hauv cov tshuaj tiv thaiv tank nce thaum lub sij hawm muaj zog theem thiab maj mam txo thaum lub sij hawm effluent theem, muab ib tug dej ntim tswj muaj nuj nqi;
(3) Lub sijhawm ua haujlwm ntawm txhua theem cov tshuaj tiv thaiv tuaj yeem hloov kho tsis tu ncua, muab kev hloov pauv siab;
(4) Lub sijhawm ua haujlwm thiab lub sijhawm ntawm txhua theem tuaj yeem ua tau zoo thiab hloov kho thiab tswj tau siv cov cuab yeej tswj tsis siv neeg;
(5) Thaum lub peev xwm thauj khoom hloov pauv ntau, kev kho kom zoo tuaj yeem tswj tau los ntawm kev kho lub sijhawm ua haujlwm;
(6) Cov dej kho tau tuaj yeem khaws cia hauv reactor thiab tso tawm tom qab kev ntsuas dej zoo;
(7) Lub zog tawm tswv yim rau lub cev tuaj yeem hloov kho raws li cov dej muaj txiaj ntsig zoo, ua kom zoo dua qhov ntim ntawm txhua lub tank tshuaj tiv thaiv thiab tus naj npawb ntawm cov tso tsheb hlau luam ua haujlwm.
Hauv cov ntsiab lus, cov txheej txheem SBR, nrog rau nws cov kev ua haujlwm tsis sib xws, muaj cov txiaj ntsig zoo hauv thaj chaw me thiab nruab nrab -kev kho dej khib nyiab. Txawm li cas los xij, nws cov kev txwv tsis tuaj yeem raug ignored nyob rau hauv loj -scale ua haujlwm tas mus li scenarios. Yog li, cov kws tshawb fawb tau tsim ntau yam kev txhim kho SBR cov txheej txheem los them nyiaj rau qhov tsis txaus ntawm SBR ib txwm muaj.
