MBBR Biofilm Kev Txhim Kho: 30-Hnub Microbial Loj hlob ncua sij hawm
Nkag siab Microbial Colonization ntawm MBBR Carriers
MBBR cov txheej txheem kev kho dej khib nyiab tso siab ntau rau kev tsim kho biofilm ua tiav ntawm MBBR cov khoom siv xov xwm. Raws li cov kws tshaj lij hauv MBBR thev naus laus zis, peb tau sau cov qauv kev loj hlob ntawm cov kab mob microbial uas txiav txim siab qhov ua haujlwm tau zoo. Cov txheej txheem txav txaj biofilm reactor yuav tsum tau ua tib zoo saib xyuas thaum lub sijhawm pib colonization, uas cov kab mob maj mam ua raws MBBR biofilm nqa thiab tsim cov zej zog lom neeg ruaj khov.
Cov txheej txheem MBBR pib nrog microbial txuas mus rau qhov chaw tiv thaiv ntawm MBBR lim xov xwm. Hauv thawj 48 teev, cov kab mob pioneer suav nrog Pseudomonas thiab Acinetobacter hom pib ua kom txias. Cov colonizers thaum ntxov no secrete extracellular polymeric tshuaj (EPS) uas tsim ib tug nplaum matrix rau tom ntej microbial txuas. MBBR kev tsim qauv ua kom muaj kev txav mus los tsis tu ncua tiv thaiv cov tuab tuab thaum txhawb nqa kev loj hlob zoo ib yam thoob plaws tag nrho cov cab kuj MBBR.
Lub Limtiam 1: Theem Pib Colonization (Hnub 1-7)
Lub sijhawm pib 7-hnub tsim lub hauv paus rau kev kho kom zoo hauv MBBR cov txheej txheem dej khib nyiab. Txij hnub 1-3, kwv yees li 15-20% ntawm MBBR cov chaw nqa khoom pom pom pom cov kab mob sib txuas hauv qab kev tshuaj xyuas microscopic. Los ntawm hnub 4-5, lub colonization accelerates, npog 40-50% ntawm thaj chaw muaj. Thaum lub sij hawm hnub 6-7, lub biofilm thickness nce mus txog 50-80 micrometers, cim qhov kev hloov ntawm thawj zaug txuas mus rau active kev loj hlob theem nyob rau hauv lub MBBR bioreactor.
MBBR thev naus laus zis thev naus laus zis pib lub lim tiam no los tsim kom muaj ntau haiv neeg microbial. Qhov kub thiab txias cuam tshuam rau theem no, nrog rau kev loj hlob zoo tshwm sim ntawm 20-35 degree. MBBR hauv daim ntawv thov kev kho dej khib nyiab yuav tsum tau saib xyuas lub sijhawm no kom paub meej tias qhov kev ua kom zoo thiab cov khoom noj muaj txiaj ntsig txhawb kev ua kom muaj zog tsis muaj cov neeg nqa khoom ntau dhau.
Lub Limtiam 2-4: Maturation thiab Stabilization (Hnub 8-30)
Nyob nruab nrab ntawm hnub 8-14, biofilm nkag mus rau theem kev loj hlob sai, ncav cuag 150-300 micrometers tuab. Lub txaj txav chaw lom neeg tam sim no qhia tau tias ntsuas tau BOD thiab COD txo qis raws li microbial ntau haiv neeg nce. Txij hnub tim 15-21, kev paub tab ntawm biofilm architecture tsim, muaj thaj chaw aerobic nyob ze ntawm tus neeg nqa khoom thiab thaj chaw anoxic / anaerobic tob hauv cov qauv. Lub sijhawm no tsim kom muaj peev xwm kho MBBR tiav nrog cov kab mob nitrifying cov neeg tsim.
Qhov kawg stabilization theem (hnub 22-30) ua tiav qhov kev ua tau zoo hauv MBBR system rau kev kho dej khib nyiab. Lub biofilm thickness stabilizes ntawm 400-600 micrometers los ntawm ntuj sloughing thiab regrowth cycles. Lub zej zog microbial tam sim no suav nrog cov neeg tshwj xeeb rau kev tshem tawm cov pa roj carbon, nitrification, thiab denitrification, ua rau MBBR hauv STP daim ntawv thov ua haujlwm tag nrho.
Table: MBBR Biofilm Txhim Kho Lub Sijhawm thiab Kev Kho Kom Zoo
| Lub Sijhawm Sijhawm | Biofilm Thickness | Kev Pabcuam Ntog | Kev kho mob zoo |
|---|---|---|---|
| Hnub 1-3 | 10-30 μm | 15-20% | <10% |
| Hnub 4-7 | 50-80 μm | 40-50% | 25-40% |
| Hnub 8-14 | 150-300 μm | 70-85% | 60-75% |
| Hnub 15-21 | 300-500 μm | 90-95% | 85-92% |
| Hnub 22-30 | 400-600 μm | 95-98% | 93-98% |
Optimizing MBBR Kev Ua Haujlwm Los Ntawm Kev Tswj Microbial
Kev ua tiav MBBR kev kho dej khib nyiab nyob ntawm kev nkag siab cov sijhawm loj hlob no. MBBR dej kho tshuab los ntawm JUNTAI suav nrog tshwj xeeb biochip MBBR cov neeg nqa khoom uas ua kom cov colonization los ntawm kev hloov kho saum npoo. Peb txoj kev tsim kho engineering rau MBBR tso tsheb hlau luam tsim ua kom pom cov hydraulics uas txhawb nqa microbial txoj kev loj hlob thaum tiv thaiv cov shear ntau dhau.
Cov txheej txheem txav txaj bioreactor ua tiav qhov ua tau zoo tshaj plaws thaum kev loj hlob ntawm microbial raug tswj kom zoo thoob plaws hauv 30- hnub tsim. Cov yam tseem ceeb suav nrog cov khoom thauj khoom sib piv, kev siv aeration, thiab kev sib npaug ntawm cov khoom noj yuav tsum tau ua tib zoo tswj los txhawb cov txheej txheem kev colonization. Los ntawm kev ua kom zoo MBBR thev naus laus zis hauv kev kho cov dej khib nyiab, cov chaw tuaj yeem ua tiav kev kho mob zoo ib yam thaum txo qis lub sijhawm pib.