MOVING BED BIOFILM REACTOR (MBBR) BIOFILM MEDIA
Cov ntaub ntawv Version: 1.0
Hnub tim:Aug 29, 2025
Kawm Subject:Simplified Comparison: MBBR vs. Cov Txheej Txheem Ua Kom Ua Tau Zoo Sludge (CAS).
MBBR Moving Bed Biofilm Reactoryog ib qho kev siv tshuab siv dej khib nyiab zoo. Nws lub hauv paus ntsiab lus ntawm kev siv cov tshuaj lom neeg tshwj xeeb raug tshem tawm hauv lub reactor ua qhov nruab nrab rau cov kab mob kom txuas thiab loj hlob, tsim kom muaj lub zog biofilm. Cov txheej txheem no innovatively combines cov kev zoo ntawm cov tsoos activated sludge txheej txheem thiab cov txheej txheem biofilm. Los ntawm txoj kev aeration lossis mechanical agitation, cov cab kuj tseem ntws hauv lub reactor, ua kom muaj kev sib cuag ntawm biofilm thiab dej khib nyiab. Qhov no tseem ceeb txhim kho cov pa phem degradation efficiency thiab kev ua haujlwm ruaj khov ntawm qhov system.
MBBR txheej txheem nta me me hneev taw, muaj zog poob siab load kuj, tsis tshua muaj sludge tawm los, yooj yim lag luam thiab tswj, thiab tsis xav tau sludge recirculation. Tam sim no, nws tau siv dav hauv kev kho cov dej phwj hauv nroog thiab cov dej khib nyiab, xws li tshem tawm cov teeb meem organic thiab nitrification / denitrification.
Cov ntu hauv qab no muab kev sib piv ntawm MBBR thiab cov txheej txheem ua kom cov sludge cov pa:
I.Dab tsi yog qhov ntau ntawm cov khoom thauj khoom organic (OLR) uas MBBR system tuaj yeem txhawb nqa, qhia hauv g BOD / m² (Cov cheeb tsam zoo)?
Organic Loading Rate (OLR) ntau yog5-20 kg COD / (m³·hnub).
Qhov ntau yam no yog nyob ntawm lub hom phiaj kho mob (carbon oxidation nkaus xwb, lossis suav nrog nitrification).
Rau Carbon Oxidation (BOD tshem tawm): Kev thauj khoom ntau dua tuaj yeem siv tau, feem ntau nyob rau hauv qhov ntau ntawm10 - 20 g BOD/m²·d.
Rau Nitrification (Ammonia tshem tawm): Lub load qis yog qhov yuav tsum tau ua, feem ntau yuav tsum tau< 5 g BOD/m²·d.
Qhov no yog vim cov kab mob nitrifying loj hlob qeeb. Lub siab BOD load yuav ua rau cov kab mob heterotrophic proliferate ntau heev, sib tw rau biofilm chaw thiab oxygen, yog li inhibiting nitrifying kab mob.
II. Dab tsi yog qhov tsawg kawg nkaus kev siv cov pa oxygen (%) uas MBBR media yuav tsum ua tiav rau kev xa cov pa oxygen los ntawm huab cua mus rau hauv cov txheej txheem kho dej khib nyiab?
Tsis tas li ntawd, qhov tsawg kawg nkaus txuag hluav taws xob xav tau, qhia hauv kWh / m³?
Yam tsawg kawg nkaus OTE & Kev txuag hluav taws xob
OTE txuas nrog rau lub tshuab aeration. Hauv MBBR system siv cov tshiab, siab -diffusers zoo, Oxygen Transfer Efficiency (OTE) hauv cov dej khib nyiab tiag tiag yuav tsum yogtsis pub tsawg tshaj 15-20%.
Cov impurities hauv cov dej khib nyiab yuav txo qhov ua tau zoo.
Hais txog qhov ntsuas "kWh/m³":
"kWh / m³" tsis yog dav siv los ua tus qauv kev ua haujlwm tseem ceeb vim nws tsis suav nrog cov pa phem concentration.
(lub zog xav tau los kho ib lub cubic meter ntawm cov dej huv piv rau ib lub cubic meter siab - lub zog dej khib nyiab yog qhov sib txawv heev).
Qhov feem ntau scientific thiab universal unit rau lub zog efficiency yogkWh/kg O₂(lub zog siv ib kg ntawm oxygen xa).
Rau qhov kwv yees kwv yees: Piv txwv tias kev kho cov dej khib nyiab hauv nroog loj (muaj zog BOD=500} mg / L, ~ 1 kg O₂ yuav tsum tau tshem tawm 1 kg BOD, thiab lub zog ua haujlwm ntawm 2.5 kWh / kg O₂),
lub zog noj ib cubic meter yuav yog kwv yees li:
0.5 kg BOD/m³ * 1 kg O₂/kg BOD * 2.5 kWh/kg O₂=**1.25 kWh/m³**
Thov nco ntsoov qhov no yog atheoretical kwv yees; Cov txiaj ntsig tseeb hloov pauv raws li dej zoo, qib kev kho mob, thiab lwm yam.
Ⅲ.Lub MBBR biofilm carrier yuav tsum tsim cov sludge tsawg dua li cov pa activated sludge system.
Qhov tsawg kawg nkaus txo qhov feem pua (%) yog dab tsi, thiab dab tsi yog qhov raug sludge tawm los, qhia nyob rau hauv kg qhuav sludge / kg BOD tshem tawm?
Raws li tau hais ua ntej, kev tsim cov sludge tsawg yog qhov tseem ceeb ntawm cov txheej txheem MBBR.
Sludge txo feem pua: Muab piv rau cov txheej txheem activated sludge (CAS), MBBR systems feem ntau ua tiav20% - 40% txonyob rau hauv sludge ntau lawm.
Sludge Yield:
Hom MBBR Sludge Yield: 0.3 - 0.6 kg Qhuav Sludge / kg BOD tshem tawm.
CAS Yield (rau kev sib piv): 0.8 - 1.2 kg Qhuav Sludge / kg BOD tshem tawm.
Yog vim li cas: Cov kab mob nyob hauv MBBR biofilm muaj lub sijhawm ntev Sludge Retention (SRT) thiab cov saw zaub mov ntev dua, ua rau muaj kev ua pa ntau dua.
(cov kab mob siv lawv tus kheej cov khoom siv ntawm tes rau kev saib xyuas). Qhov no hloov ntau cov organic teeb meem thaum kawg rau hauv CO₂ thiab dej, tsis yog mus rau hauv cov cell tshiab (sludge).
MBBR biofilm media yuav tsum muaj kev hloov pauv oxygen tsis pub tsawg dua pes tsawg grams O₂/hnub (g O₂/d)?
Kev qhia meej: "Oxygen hloov efficiency" yog inherently aratio los yog feem pua (%), tsis yogTus nqi tag nrho (g O₂/d). Covtag nrho oxygen hloov peev xwm (g O₂ / d)ntawm txhua qhov aeration system nyob ntawm nws qhov ntsuas
(piv txwv li, tus naj npawb ntawm diffusers, tank ntim, lub peev xwm ntawm lub tshuab), thaum "efficiency" yog hais txog qhov zoo ntawm nws hloov oxygen (OTE %). Thov xa mus rau cov lus teb rau nqe lus nug 2 (OTE> 15-20%).
Yog tias koj cov lus nug cuam tshuam nrogoxygen hloov peev xwmntawm MBBR system, qhov no feem ntau txiav txim siab los ntawm kev tsim thiab teev ntawm covaeration system (blowers + diffusers), tsis yog los ntawm biofilm nqa lawv tus kheej.
Lub luag haujlwm tseem ceeb ntawm kev tshaj tawm yog los muab ib qho chaw rau microbial txuas; nws tsis yog nws tus kheej tsim lossis hloov cov pa oxygen, txawm hais tias nws lub xub ntiag cuam tshuam rau txoj hauv kev npuas thiab kev hloov pauv loj.
Tsis lees paub:Cov txheej txheem tsis muaj nyob rau hauv daim ntawv no yog ua raws li cov xwm txheej thiab kev lag luam kev paub, tsuas yog siv rau kev siv xwb. Cov qauv tsim tshwj xeeb hauv kev siv tswv yim yuav tsum tau muab xam kom zoo thiab siv tau raws li qhov tseeb ntawm qhov project (cov dej zoo, cov qauv dej ntws tawm, qhov kub thiab txias, thiab lwm yam).