1. Lub hauv paus ntsiab lus thiab cov yam ntxwv ntawm MBBR txheej txheem
1. Lub hauv paus ntsiab lus ntawm MBBR txheej txheem
Lub hauv paus ntsiab lus ntawm MBRBR cov txheej txheem yog txhawm rau nce biomass thiab hom tsiaj hauv cov neeg nqa khoom los ntawm kev ncua cov khoom siv rau cov khoom siv ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua haujlwm ntawm cov kev ua tau zoo ntawm cov reactor. Txij li qhov ceev ntawm cov muab tub lim yog ze rau ntawm cov dej, nws yog nyob rau hauv ib qho kev sib xyaw ua ke nrog dej thaum lub sij hawm aeration, thiab ib puag ncig rau kev loj hlob microbial yog roj, kua, thiab khoom peb-theem. Kev sib tsoo thiab shearing ntawm cov cab kuj nyob rau hauv cov dej ua rau cov pa npuas me me thiab nce kev siv cov pa oxygen. Tsis tas li ntawd, txhua tus cab kuj muaj cov kab mob sib txawv sab hauv thiab sab nraud, qee cov kab mob anaerobic lossis cov kab mob facultative loj hlob sab hauv, thiab sab nraud yog cov kab mob eutrophic, yog li txhua tus cab kuj yog microreactor, kom nitrification cov tshuaj tiv thaiv thiab cov tshuaj tiv thaiv denitrification coexist, yog li txhim kho kev ua haujlwm. nyhuv.
Cov txheej txheem MBBR muab cov txiaj ntsig zoo ntawm lub txaj fluidized ib txwm thiab kev sib cuag lom oxidation. Nws yog txoj kev kho dej phwj tuaj tshiab thiab ua tau zoo. Cia siab rau lub aeration nyob rau hauv lub aeration tank thiab lifting nyhuv ntawm cov dej ntws, cov cab kuj nyob rau hauv ib tug fluidized lub xeev, yog li tsim ib tug ncua kev kawm ntawv. Kev loj hlob activated sludge thiab txuas ntxiv loj hlob biofilm ua rau lub txaj txaj biofilm siv tag nrho qhov chaw reactor, muab kev ua si tag nrho rau qhov zoo ntawm ob theem txuas thiab cov kab mob uas raug tshem tawm, thiab ua rau lawv sib ntxiv. Sib txawv ntawm cov khoom siv yav dhau los, cov khoom ntim tau raug tshem tawm tuaj yeem nkag mus rau hauv cov dej phwj tuaj thiab ntau zaus, yog li lawv hu ua "mobile biofilms".
2. Qhov zoo ntawm MBBR
Piv nrog rau cov txheej txheem activated sludge thiab ruaj khov biofilm txoj kev, MBBR tsis tsuas yog muaj kev ua haujlwm siab thiab ua haujlwm yooj yim ntawm cov txheej txheem activated sludge, tab sis kuj muaj cov yam ntxwv ntawm kev poob siab load tsis kam, sludge hnub nyoog ntev thiab tsawg dua sludge ntawm cov txheej txheem biofilm.
(1) Ntim cov yam ntxwv
Cov fillers feem ntau yog ua los ntawm polyethylene, polypropylene thiab lawv cov ntaub ntawv hloov kho, polyurethane ua npuas ncauj, thiab lwm yam., qhov tshwj xeeb lub ntiajteb txawj nqus yog ze rau dej, feem ntau yog cylindrical thiab kheej kheej, yooj yim rau dai zaj duab xis, tsis muaj agglomeration, tsis muaj clogging, yooj yim rau tso cov zaj duab xis. .
(2) Muaj peev xwm denitrification zoo
Ib puag ncig muaj txiaj ntsig zoo, anoxic thiab anaerobic ib puag ncig yog tsim los ntawm cov muab tub lim, thiab cov tshuaj nitrification thiab denitrification tuaj yeem tshwm sim hauv ib lub reactor, uas muaj txiaj ntsig zoo rau kev tshem tawm ammonia nitrogen.
(3) Cov nyhuv ntawm kev tshem tawm cov organic teeb meem yog qhov zoo
Cov sludge concentration nyob rau hauv lub reactor yog kuj siab. Feem ntau, cov sludge concentration yog 5 mus rau 10 npaug ntawm cov txheej txheem activated sludge, thiab tuaj yeem siab li 30 txog 40 g / L. Kev kho kom zoo ntawm cov organic teeb meem yog txhim kho, thiab kev poob siab load kuj muaj zog.
(4) Yooj yim tswj thiab tswj
Tsis tas yuav teeb tsa cov hlua khi rau hauv lub tank aeration, kev saib xyuas ntawm cov muab tub lim thiab cov khoom siv aeration hauv qab ntawm lub tank yog yooj yim, thiab kev nqis peev thiab hauv pem teb yuav txuag tau.
3. Qhov tsis zoo ntawm MMBR
(1) Cov muab tub lim nyob rau hauv lub reactor yog nyob rau hauv ib tug fluidized lub xeev los ntawm lub lifting nyhuv ntawm aeration thiab dej ntws. Nyob rau hauv qhov tseeb engineering, lub zos muab tub lim accumulation yog nquag tshwm sim. Txhawm rau kom tsis txhob muaj qhov tshwm sim ntawm kev ntim khoom, nws yog ib qho tsim nyog yuav tsum tau txhim kho cov txheej txheem ntawm cov kav dej aeration thiab cov qauv ntawm lub reactor. Cov qauv ntawm lub reactor feem ntau txiav txim siab nws cov khoom hydraulic. Nyob rau hauv kev tsim engineering, thaum qhov ntev-rau-qhov sib piv ntawm ib lub reactor yog hais txog 0.5 thiab qhov ntev tsis ntau tshaj 3m, nws yog qhov zoo rau cov ntim kom txav mus los. Hauv kev tsim engineering tiag tiag, ntau qhov kev sim yuav tsum tau ua kom zoo dua cov qauv thiab cov yam ntxwv hydraulic ntawm lub reactor, txo kev siv hluav taws xob, thiab txhim kho kev lag luam ntawm MBBR.
(2) Lub effluent ntawm lub reactor feem ntau yog teem nrog daim phiaj daim phiaj los yog daim phiaj kom tsis txhob poob ntawm packing, tab sis nws yog ib qho yooj yim ua rau txhaws. Hauv cov phiaj xwm ua tau zoo, cov phiaj xwm txav tau tuaj yeem teeb tsa rau kev tu ib txwm muaj, thiab cov khoom siv cua rov qab tuaj yeem teeb tsa los tiv thaiv kev txhaws.