Los ntawm: Kate
Email:Kate@aquasust.com
Hnub tim: 7 Kaum Ib Hlis 2024
Nyob rau hauv MBBR (Moving Bed Biofilm Reactor) txheej txheem, tsim kom muaj lub tshuab aeration yog qhov tseem ceeb rau kev tshem tawm cov pa phem. Kev teeb tsa tsim nyog ntawm MBBR media thiab aeration cov cuab yeej (xws li disc diffusers) tuaj yeem txhim kho cov pa oxygen hloov pauv tau zoo. Hauv qab no yog cov qauv tsim tseem ceeb rau kev ua haujlwm zoo MBBR aeration tank, suav nrog cov piv txwv suav tshwj xeeb los pab koj sai sai rau kev tsim qauv.
1. Oxygen Demand xam xam: Ua raws li qhov xav tau ntawm cov pa phem
Cov pa oxygen thov tus nqi (ODR) txiav txim siab qhov tsawg kawg nkaus cov pa oxygen xav tau nyob rau hauv lub aeration tank thiab tuaj yeem kwv yees raws li COD load ntawm cov neeg muaj zog:
ODR=COD × Q × 1.5
Qhov twg:
- COD: Chemical Oxygen Demand of influent (mg/L)
- Q: Tus nqi dej khib nyiab (m³ / h)
- 1.5: Oxygen demand coefficient
Case xam
Piv txwv tias COD yog 300 mg / L thiab cov dej khib nyiab yog 100 m³ / h:
ODR=300 × 100 × 1.5=45000 mg/h=45 kg/h
Qhov txiaj ntsig no txhais tau hais tias lub tank aeration yuav tsum tau muab 45 kg ntawm oxygen ib teev kom tau raws li kev kho mob.
2. Oxygen Transfer Efficiency (OTE) thiab xav tau huab cua ntim
Oxygen transfer efficiency (OTE) feem ntau yog txiav txim siab los ntawm hom khoom siv aeration thiab dej tob. Feem ntau, zoo npuas disc diffusers ua tiav 15%-25% OTE. Cov mis rau qhov xav tau huab cua ntim yog:
Q{{0}}air=ODR / (OTE × 0.233)
Case xam
Piv txwv li OTE ntawm 20%:
Q{0}air=45 / (0.20 × 0.233) ≈ 967 m³/h
Qhov kev suav no qhia tau hais tias nyob rau hauv cov xwm txheej no, kwv yees li 967 m³ / h ntawm huab cua xav tau.
3. MBBR Media Flow Design: Ua kom lub cev tsis zoo
Hauv MBBR system, kev txav mus los ntawm MBBR media yog qhov tseem ceeb. Media yuav tsum tau muab faib ua tusyees yam tsis muaj clogging nyob rau hauv lub aeration tank, uas yuav ua tau tiav los ntawm kev tso diffuser kom zoo. Siv cov npuas zoo nkauj diffusers tuaj yeem tsim cov microbubbles, txhim kho cov pa oxygen hloov pauv thiab txhawb nqa txawm tias ntws tawm ntawm cov xov xwm, uas tiv thaiv qhov tsis sib xws biofilm thickness.
4. Dynamic Airflow hloov kho: Txo kev siv zog
Thaum cov dej khib nyiab concentration thiab ntws hloov pauv, kho airflow nrog kev tswj tsis siv neeg tuaj yeem ua kom zoo dua kev siv zog. Ntxiv aeration thaum lub sij hawm loads ntau dua thiab txo nws thaum lub sij hawm qis loads xyuas kom meej tias oxygen mov raws li kev kho mob xav tau thaum txo kev siv zog.
5. Kev tswj qhov tob: Ua kom zoo dua Oxygen Hloov thiab siv zog
Dej qhov tob cuam tshuam ob qho tib si aeration efficiency thiab kev siv zog. Feem ntau, kev tuav cov aeration tank qhov tob ntawm 3-5 meters tuaj yeem txhim kho cov pa oxygen dissolution, tab sis qhov tob tob ua rau muaj zog noj. Xaiv qhov tob kom tsim nyog sib npaug oxygen hloov nrog cov nqi ua haujlwm.
6. Tiv thaiv ua npuas ncauj thiab Media Clogging
Txhawm rau tiv thaiv kev ua npuas dej thiab xov xwm clogging, defoaming cov cuab yeej tuaj yeem ntsia tau rau saum lub aeration tank, thiab kev tu cov disc diffusers tsis tu ncua. Optimized aeration cov cuab yeej thiab cov tswv yim kev tso kawm pab txo cov npuas tsim thiab tswj kom ua haujlwm tau zoo.