Dab tsi yog vim li cas rau cov dej daj thiab cov sludge zoo nyob rau hauv cov effluent ntawm lub tank thib ob (secondary sedimentation tank) thaum lub sij hawm kho dej phwj? Nov yog kuv qhov kev xav ntawm qhov teeb meem no:
Kev ua haujlwm ntawm lub tank thib ob yog lub luag haujlwm tseem ceeb rau cov av nkos thiab dej sib cais kom paub meej cov dej ntws tawm. Txawm li cas los xij, hauv kev ua haujlwm tiag tiag, peb feem ntau ntsib teeb meem xws li cov dej daj daj thiab cov sludge zoo tawm nrog cov effluent, uas tsis yog tsuas yog cuam tshuam rau cov effluent zoo, tab sis kuj tseem cuam tshuam rau cov txheej txheem tom ntej.
Ua rau kev tsom xam
1. Kev tswj tsis raug ntawm sludge rov qab piv thiab sludge tawm
Cov sludge xa rov qab ntau dhau ua rau lub sijhawm hydraulic tsis txaus, thiab tsis txaus cov sludge tso tawm yuav ua rau cov sludge concentration thiab cov av nkos ntau dhau, uas dhau lub peev xwm ntawm cov sedimentation tank thib ob, yog li ua rau ntab sludge.
Kho cov sludge rov qab piv rau qhov tsim nyog los xyuas kom meej tias cov seem sludge tawm sib tw rau lub cev sludge load kom tswj tau cov sludge concentration ntawm qhov tsim nyog.
2 Txo qhov kev daws teeb meem ntawm kev ua haujlwm sludge
Kev loj hlob ntau dhau ntawm cov kab mob filamentous thiab nce cov ntsiab lus ntawm extracellular polymers (EPS) nyob rau hauv sludge tuaj yeem ua rau xoob sludge qauv thiab txo qis kev ua haujlwm.
Los ntawm kev kho cov aeration ntim thiab cov khoom noj sib piv, kev loj hlob ntawm cov kab mob filamentous tuaj yeem tswj tau, cov ntsiab lus EPS tuaj yeem raug txo, thiab kev daws teeb meem ntawm sludge tuaj yeem txhim kho.
3 Kev tsim tsis tsim nyog thiab kev teeb tsa lossis kev ua haujlwm tsis zoo
Lub peev xwm tank tsis txaus, cov dej ntws tsis sib xws lossis cov khoom siv tsis ua haujlwm yuav cuam tshuam rau sludge daws.
Ua ib qho kev tshuaj xyuas ntawm lub tank thib ob kom paub meej tias tus qauv tsim tsim nyog thiab cov dej ntws tau sib npaug. Nyob rau tib lub sijhawm, tsis tu ncua xyuas thiab tswj cov cuab yeej siv tshuab xws li scrapers kom ntseeg tau tias lawv ua haujlwm li qub.
4 Sudden nce nyob rau hauv influent dej ntim thiab cuam tshuam los ntawm fluctuations
Tam sim ntawd nce nyob rau hauv cov dej ntim yuav ua rau cov av-dej tshuav nyiaj li cas nyob rau hauv lub thib ob sedimentation tank, ua rau nws tsis yooj yim sua rau sludge nyob rau hauv lub sij hawm.
Los ntawm kev teeb tsa cov chaw ua ntej xws li tswj cov tso tsheb hlau luam, cov dej ntim dej zoo thiab cov dej zoo tau hloov kho kom txo tau qhov cuam tshuam ntawm cov dej xau thib ob.
5. High effluent ammonia nitrogen: ammonia nitrogen tsis tau kho tag nrho hauv AO system, thiab cov effluent tshwm daj. Tswj lub nra hnyav: Tsim nyog tswj lub ntim ntim kom tsis txhob muaj kev cuam tshuam ntawm kev poob siab ntawm lub cev.
6. Lub effluent nqa me me ntawm activated sludge: ua rau lub teeb yuav refracted thiab yellowed.
7. Cov hlau ntau dhau los yog chromium ions: ua rau cov ions ua kom muaj xim zoo nkauj.
8. Shock load: Lub sludge load cuam tshuam los yog nto load yog siab dhau, ua rau tsis zoo flocculation ntawm activated sludge hais, thiab me me unflocculated activated sludge hais ntws tawm nrog dej.
9. Activated sludge aging: Activated sludge aging leads to loose floc structure and produces a lot of fine particles, uas nyuaj rau zoo nyob rau hauv lub thib ob sedimentation tank.
10. Activated sludge poisoning: Activated sludge poisoning ua rau txo qis cov kab mob microbial, thiab cov kab mob tuag taus thiab cov kab mob activated sludge yuav ntws tawm nrog dej.
11. Denitrification phenomenon thaum lub sij hawm sedimentation: Nyob rau hauv anoxic los yog anaerobic tej yam kev mob, denitrifying kab mob nyob rau hauv cov sludge txo nitrates rau nitrogen gas, nqa zoo sludge mus rau saum npoo ntawm dej.
Kev daws
Tswj cov dej inlet load: tsim nyog tswj cov dej inlet ntim kom tsis txhob muaj kev cuam tshuam ntawm kev poob siab ntawm qhov system.
Ua kom cov sludge rov qab: nce cov sludge rov qab, ua kom lub sijhawm nyob hauv cov sludge nyob rau hauv lub tank thib ob, thiab tiv thaiv sludge aging.
Kho lub ntim aeration: kom tsim nyog txo lub ntim aeration kom tsis txhob muaj ntau dhau aeration ua rau lub disintegration ntawm activated sludge.
Txhim khu kev tswj cov sludge: raws sij hawm tso cov sludge seem kom tiv thaiv cov sludge kom nyob twj ywm hauv lub tank thib ob ntev dhau.
Kev kho tshuaj: xws li siv lub decolorizer, los daws qhov teeb meem ntawm cov hlau ions ntau dhau los yog chromium ions