Case Study of Brewery Wastewater Treatment -
CIRCOX txheej txheem ntawm lub tuam txhab Shanghai
Qhov no brewery wastewater kho system muaj peev xwm ntawm4,800 m³ / hnub, nrog cov txheej txheem ntws qhia hauvDaim duab 1-1.
Cov Tsev Kho Mob Tseem Ceeb
1. IC (Internal Circulation) Reactor
Tsim nyob rau hauv 1980s los ntawmPaques (Netherlands)Raws li UASB cov ntsiab lus, IC reactor muaj:
- Kev sib xyaw ua ke
- Sludge expansion txaj
- Polishing cheeb tsam
- Recirculation system
Qhov zoo tshaj cov txheej txheem anaerobic:
✔ Compact tsim(Qhov siab / txoj kab uas hla: 16-25 m siab, me hneev taw)
✔ Tsawg sludge ntau lawm(~ 1% ntawm COD influent, yooj yim dewatering)
✔ Zog -nrawm(Tus kheej- ncig ntawm biogas nqa, tsis muaj lwm lub zog sib xyaw)
✔ kaw qhov system(Controls VOC emissions; biogas: 70–80% CH₄, 20–30% CO₂)
2. CIRCOX(Closed Internal ReCirculation Oxidation) Reactor
A ntsug dual-lub tog raj kheej aerobic biofilm reactor:
- Pem hauv ntej riser tube: Dej + compressed cua ntws mus rau pem hauv ntej, tsim biofilm ntawm cov khoom siv thauj khoom (cov xuab zeb zoo{1}}zoo li cov khoom siv).
- Outer downcomer: Settled sludge rov qab mus rau lub reactor puag.
- "Caap-zoo li" sab saum toj(inch nthuav dav los ntawm ~ 1/3)rau peb -theem sib cais(biogas / dej / sludge).
Cov yam ntxwv tseem ceeb:
- Zoo heev sludge settling zog (tsawg kawg biomass washout)
- High kev kho efficiency nrog15-25 g / L VSSconcentration
Txheej Txheem Flow (Saib rau daim duab. 1-1)
- Cov dej khib nyiab→ Inlet zoo → Pump → Rotary screen (nrogonline pH / ntsuas kub).
- Tsis tank(submersible tov khoom rau homogenization) →Ua ntej -acidification tank(3h HRT; ib nrab VFA hloov dua siab tshiab + pH / nutrient hloov).
- IC reactor(2h HRT; COD load:15 kg / m³·d)) → CIRCOX reactor(1.5h HRT; COD thauj khoom:6 kg/m³·d.).
- Lamella clarifier(Flocculant dosing) →Cov dej tank(ib nrab rov siv dua / tso tawm).
- Sludge→ Dewatering system.
- Kev kho cua sov: Centrifugal ntxuam → Scrubber ntauwd (siv cov tshuaj tua kab mob + dilute alkali).
Tsim Parameters
| Table 1-1 Main Treatment Unit Design Parameters | ||||
| Chav tsev | Qhov ntev | HRT | COD Loading | Sau ntawv |
| Ua ntej -acidification | Ø6m × H21m | 3h | - | Kev hloov pauv pH / nutrient |
| IC reactor | Ø5m × H20.5m | 2h | 15 kg / m³·d) | Biogas tawm los: 0.35 m³ / kg CODₜₕ |
| CIRCOX reactor | Ø5m (hauv paus) – Ø8m (saum) × H18.5m | 1.5h | 6 kg/m³·d. | Qhov hnyav: 15-25 g / L |
Kev ua tau zoo
- Cov dej tsis zoo(Table 1-2): Ua tau raws li tag nrho cov qauv tso tawm.
- Automation: Tag nrho automated tswj (IC / CIRCOX core Cheebtsam imported los ntawm Netherlands).
| Table 1-2 Kev Kho Mob Kev Ua Haujlwm ntawm Lub Chaw Tsim Khoom Cov dej khib nyiab hauv Shanghai |
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| Parameter | Muaj hwj chim | Cov dej ntws tawm | ||
| Nruab nrab | Ntau yam | Nruab nrab | Ntau yam | |
| COD (mg / L) | 2000 | 1000-3000 | 78 | 50-100 |
| BOD₅ (mg / L) | 1250 | 600-1875 | Tsawg dua los yog sib npaug li 30 | - |
| SS / (mg / L) qhov hnyav | 500 | 100-600 | 50 | 10-100 |
| NH₄⁺-N (mg/L) | 30 | 12-45 | 10 | 5-15 |
| Phosphate (mg / L) | - | 10-30 | - | - |
| pH | 7.5 | 4-10 | 7.5 | 6-9 |
| Kub (degree) | 37 | 30-50 | ＜40 | - |
Qhov zoo ntawm IC + CIRCOX combo:
- Compact hneev taw
- Cov ntxhiab tsw - ua haujlwm dawb
- Tsawg sludge tawm los
- Kev kho mob siab