Yuav ua li cas Ob-Stage Anaerobic-Aerobic MBBR kho cov dej phwj tuaj nyob deb nroog ntawm 8℃- Thiab Tseem Ua Raws Li Cov Qauv A
Kev tshawb fawb los ntawm Changzhou, Jiangsu Province, Suav teb qhia tau hais tias nrog rau cov khoom siv xov xwm zoo, kev rov ua dua tshiab, thiab cov txheej txheem tsim, MBBR tshuab tuaj yeem ua tiav ntau dua 80% tshem tawm COD, ammonia nitrogen, TN, thiab TP hauv lub caij ntuj no - qhov twg cov txheej txheem ua haujlwm tsis tu ncua.
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83.8%
COD tshem tawm
173.7 → 28.1 mg/L
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84.9%
NH₃-N tshem tawm
28.6 → 4.3 mg/L
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80.1%
TN tshem tawm
49.5 → 9.9 mg/L
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85.7%
TP tshem tawm
2.73 → 0.39 mg/L
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Qhov kev sib tw
Yog vim li cas lub caij ntuj no Kills Pas dej nyob deb nroog kev kho mob
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Tuam Tshoj cov chaw nyob deb nroog tau tso tawm 33.71 billion tons ntawm cov dej phwj hauv tsev hauv xyoo 2022. Ntau qhov chaw kho mob decentralized - tsim thiab sim nyob rau hauv qhov kub thiab txias - tsis ua raws li cov qauv tso tawm thaum lub caij ntuj no, ncaj qha ua paug rau cov pas dej, thaj av, thiab cov khoom siv dej hauv zos. Lub hauv paus ua rau lom: cov kab mob nitrifying ua tau zoo ntawm 25-30 degree. Hauv qab 15 degree, lawv lub peev xwm metabolic poob qis heev. Hauv qab 5 degree, kev ua si yuav luag nres. Qhov tshwm sim yog cascading tsis ua hauj lwm - COD tshem tawm qeeb, nitrification stalks, denitrification poob nws cov pa roj carbon, thiab phosphorus tshem tawm collapses nrog rau PAO (polyphosphate- accumulating organism). Txoj kev tshawb no, ua txij lub Cuaj Hlis 2022 txog Lub Plaub Hlis 2023 hauv Luoyang Town, Wujin District, Changzhou City, tau sim seb puas muaj kev tsim kho tshwj xeeb ob-theem anaerobic-aerobic MBBR txheej txheem tuaj yeem kov yeej cov kev txwv ntawm cov dej kub ntawm 8-10 degree. |
Cov dej zoo
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Txheej txheem tsim
Peb Qhov Kev Hloov Kho Uas Ua Qhov Sib Txawv
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Huab cua Stripping Recirculation
Nitrified kua rov qab los ntawm sedimentation tank mus rau equalization tank A1 ntawm ib tug recirculation ratio ntawm200–400%. Qhov no ntxiv cov pa roj carbon monoxide rau denitrification - lub fwj loj tshaj plaws nyob rau hauv txias - huab cua nitrogen tshem tawm.
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MBBR Biofilm Carriers
Ua ntej-cultured thiab acclimated MBBR cov cab kuj ntxiv rau txhua theem reactor. Cov neeg nqa khoom nce kev sib cuag thaj chaw tshwj xeeb thiab biomass, hosting qis -kub- yoog cov kab mob nitrifying uas tswj kev ua haujlwm ntawm 8℃qhov twg cov sludge tsis tuaj yeem.
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Aeration -Txhim kho Phosphorus tshem tawm
Tshaj sludge tshem tawm los ntawm aeration stirring thiab cua stripping. Qhov no txhim kho phosphorus tso tawm thiab txhawb nqa kev caij tsheb kauj vab los ntawm PAOs thiab tiv thaiv lub hnub nyoog sludge los ntawm kev dhau - ib qho tseem ceeb hauv kev tswj PAO kev muaj peev xwm ntawm qhov kub thiab txias.
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| Theem | HRT | UA lub hom phiaj | Muaj nuj nqi |
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| Anaerobic A1 | 3 h | < 0.5 mg/L | Phosphorus tso tawm, denitrification nrog rov qab nitrified kua |
| Aerobic O1 | 2 h | 2.0–4.0 mg/L | COD degradation, nitrification, phosphorus uptake |
| Anaerobic A2 | 2 h | < 0.5 mg/L | Ntxiv denitrification, theem nrab phosphorus tso tawm |
| Aerobic O2 | 1 h | 2.0–4.0 mg/L | Thaum kawg nitrification, phosphorus uptake, effluent polishing |
| Total HRT | 8 h | - | Recirculation piv: 200-400% |
Kev kho mob tshwm sim
Theem-los ntawm-Theem Tshem Tawm Kev Ua Haujlwm ntawm 8–10 degree
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COD Tshem Tawm - 83.80% tag nrho
Txawm tias qhov kub thiab txias, COD tshem tawm ntau tshaj 80% - qhia tau hais tias ob- txheej txheem theem tswj cov organic degradation los ntawm ob qho tib si anaerobic transformation (PAOs, denitrifying bacteria) thiab aerobic microbial degradation. MBBR cov cab kuj muab cov biomass txaus los them rau qhov txo qis ntawm -cell metabolic tus nqi ntawm 8℃.
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NH₃-N Tshem tawm - 84.93% tag nrho
Kev tshem tawm ammonia nitrogen tau tsom mus rau theem aerobic (O1, O2), qhov twg cov kab mob nitrifying ntawm MBBR cov chaw nqa khoom khaws cia muaj peev xwm nitrification siab txawm tias qhov kub ntawm 8-10℃dej. Qhov no yog qhov txiaj ntsig tseem ceeb ntawm cov khoom siv biofilm tshaj cov sludge nyob rau hauv qhov chaw txias: cov neeg nqa khoom biofilm hauv zej zog tuaj yeem ua ntej -acclimated rau qis kub, hosting txias-adapted nitrifier hom uas tsis tuaj nyob rau hauv cov pa activated sludge systems.
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TN Tshem Tawm - 80.06% tag nrho
Huab cua stripping recirculation ntawm 200-400% piv yog qhov txiav txim siab. Los ntawm kev xa cov kua nitrified rov qab rau A1, cov pa roj carbon txaus muaj rau denitrification txawm tias qhov muaj txiaj ntsig COD / N piv qis qis - feem ntau ua rau TN tsis yog - ua raws li qhov txias - huab cua nyob deb nroog kev kho mob.
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TP Tshem Tawm - 85.71% tag nrho
TP tau nce mus rau 6.82 mg / L tom qab A1 - ib qho kev qhia tias PAOs tau nquag tso phosphorus nyob rau hauv thaj tsam anaerobic, paub meej tias lom phosphorus uptake tau ua haujlwm. Cov theem tom ntej aerobic thiab tshaj sludge tshem tawm ntawm huab cua stripping txo TP mus rau 0.39 mg / L.
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Microbial zej zog tsom xam
High Microbial Diversity tuav ntawm qhov kub thiab txias
Siab -throughput sequencing ntawm biofilm cov zej zog los ntawm cov anaerobic thiab aerobic zones qhia tau hais tias microbial ntau haiv neeg tseem nyob siab txawm nyob rau ntawm 8-10℃- ib tug ncaj tshwm sim ntawm MBBR cab kuj muab kev tiv thaiv micro- ib puag ncig uas muaj ntau haiv neeg zej zog tuaj yeem tsim thiab tiv thaiv kev ntxuav tawm.
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Anoxic Zone (A)
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Aerobic Zone (O)
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| Genus | Lub luag haujlwm tseem ceeb hauv qhov system |
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| Lysobacteria | secretes phosphatase kom degrade phosphorus; tseem ceeb hauv aerobic cheeb tsam ntawm 20.3% |
| Acinetobacter | Decomposes organic teeb meem rau hauv cov organic acids raws li substrate rau nitrifiers / denitrifiers; siv nitrate ua electron acceptor |
| Flavobacterium | Hloov cov organic mus rau acids / fatty acids nyob rau hauv anaerobic cheeb tsam; cov khoom pub rau aerobic theem rau ntxiv degradation |
| Acidovorax | Siab- muaj peev xwm degradation ntawm complex organics (proteins, qab zib, rog); txo COD zoo |
| Pseudoxanthomonas | Nitrification: oxidises ammonia nitrogen rau nitrite thiab nitrate |
| Stenotrophomonas | COD degradation + tshuaj tua kab mob inhibiting cov kab mob phem, tiv thaiv cov txiaj ntsig microbial |
| Brevundimonas | Facultative anaerobe nrog ob qho tib si nitrification thiab denitrification zog; degrades macromolecular organics |
Cov lus xaus
Qhov no txhais tau li cas rau cov neeg nyob deb nroog MBBR cog tsim
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1
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MBBR cov cab kuj tseem ceeb rau kev ua raws li huab cua txias -
Cov cab kuj biofilm hosts ua ntej- hloov qis-kub nitrifiers uas tshem tawm cov sludge tsis tuaj yeem tswj tau. Ntawm 8 degree, cov cab kuj-raws li cov tshuab ua tau raws li cov pa activated sludge ua tsis tau.
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2
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High recirculation ratio (200-400%) compensates rau carbon tsis txaus
Nyob rau hauv huab cua txias, qis -C/N influent yog lub hauv paus vim li cas denitrification ua tsis tau. Rov qab nitrified kua ntawm qhov sib piv siab ntxiv cov pa roj carbon monoxide thiab ua kom denitrification ua haujlwm thoob plaws lub caij ntuj no.
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3
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8h HRT txaus thaum tag nrho peb qhov kev hloov kho tau siv ua ke
Kev sib xyaw ua ke - MBBR cov neeg nqa khoom + huab cua stripping recirculation + aeration- txhim kho sludge tshem tawm - ua tiav Class A effluent (GB 18918-2002) thiab Jiangsu DB32 / T 3462-2018 ua raws li hydraulic lub sij hawm tsis pub dhau 8℃decoction tshuab.
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Qhia txog MBBR cov neeg nqa khoom rau txoj haujlwm kho mob nyob deb nroog lossis kev faib tawm?
Juntai muab khoom ua ntej -cultured MBBR biocarriers tsim nyog rau qis- qhov kub thiab txias, suav nrog cov khoom me me - nplai ntim thiab daim ntawv thov kev kho dej phwj hauv nroog. Factory- cov khoom siv ncaj qha, tsis muaj kev txiav txim yam tsawg kawg nkaus. |
→ Hu rau peb pab neeg Saib MBBR cov cab kuj |