Kev kho cov dej khib nyiab hauv tsev kho mob yog ib txoj haujlwm xav tau tshaj plaws hauv dej engineering. Tshaj li cov pa phem ib puag ncig, cov kwj deg nqa cov kab mob, tshuaj tua kab mob, tshuaj tua kab mob los ntawm cov khoom, thiab cov tshuaj residues uas thawb tawm cov kev txwv rau lawv cov qib nruj tshaj plaws. Ua raws li cov kev txwv no tau ib txwm coj tus nqi ib puag ncig hnyav - txog tam sim no. Qhov no tiag tiag -kev tshawb fawb ntiaj teb no los ntawm Qib 3A tsev kho mob hauv Yichang, Tuam Tshoj, qhia tias A/O-MBBR system ua txhaum kev lag luam-tawm: cov pa roj carbon ntau ntawm tsuas yog0.50 kg CO2-eq/m³, kwv yees66% qis duadua li qhov sib npaug membrane bioreactor (MBR) tshuab kho cov dej khib nyiab tib yam.
Vim li cas Tsev Kho Mob Wastewater yog Carbon teeb meem
Cov dej khib nyiab hauv tsev kho mob sib txawv ntawm cov dej phwj hauv nroog. Nws sib txuas cov organic loads siab nrog cov tshuaj lom neeg lom neeg uas yuav tsum raug rhuav tshem ua ntej tso tawm. Cov qauv nruj tshaj plaws ua rau cov neeg ua haujlwm kho mob tsis muaj qhov cuam tshuam rau qhov yuam kev, uas yav dhau los thawb cov neeg tsim qauv mus rau lub zog- tshaib plab thiab tshuaj lom neeg- cov txheej txheem hnyav. Qhov tshwm sim: kev kho nws tus kheej tau dhau los ua qhov tseem ceeb ntawm cov pa hluav taws xob (GHG) emissions.
Qhov kev pom ntawm qhov kev tshawb fawb no yog qhov ntawdkev xaiv cov txheej txheem, tsis yog kev kho mob nkaus xwb, txiav txim siab cov txiaj ntsig carbon. Los ntawm kev txheeb xyuas txhua qhov emissions dhau ib xyoos ua haujlwm - hluav taws xob, txheej txheem methane (CH₄), nitrous oxide (N₂O), chemicals, thiab sludge thauj - kev tshuaj xyuas ua raws IPCC 2019 cov lus qhia thiab tsim kom tiav, auditable carbon ledger. Cov lej qhia raws nraim qhov twg cov emissions nkaum thiab qhov levers xa qhov kev txo qis tshaj plaws.
Kev cog thiab txheej txheem nyob rau hauv kev kawm
A/O-MBBR Configuration ntawm 1,200 m³/d Tsev Kho Mob Chaw Nres Tsheb
Qhov chaw kho mob tau commissioned hauv 2020 nrog lub peev xwm tsim ntawm1,200 m³/d. Nws cov txheej txheem tsheb ciav hlau yog compact thiab robust: ib tug anoxic tank ua raws li ib tug aerobic / MBBR tank, ib tug thib ob clarifier, thiab zaum kawg tshuaj tua kab mob. Lub txaj txaj biofilm reactor ntim cov khoom siv biofilm siab rau hauv thaj chaw aerobic, yog li lub kaw lus tswj xyuas cov khoom siv biomass loj hauv qhov me me - qhov tseem ceeb ntawm cov tsev kho mob cov tsev kawm ntawv uas tsis muaj av.
Table 1 piav qhia txog 2023 cov ntaub ntawv kev ua haujlwm txhua xyoo uas pub cov nyiaj siv nyiaj carbon. Nco ntsoov qhov kev ua tau zoo ntawm nitrogen: influent TN ntawm 55 mg / L yog txo kom tsuas yog 15 mg / L, thaum CODCr poob los ntawm 420 mus rau 38 mg / L - pov thawj tias cov txheej txheem muab kev kho kom ruaj khov, ua raws li kev kho mob thoob plaws xyoo.
| Qeb | Yam khoom | Chav tsev | Tus nqi |
| Dej | Ib xyoo ntim | m³/a | 365,000 |
| Dej | Influent CODCr | mg/L | 420 |
| Dej | Effluent CODCr | mg/L | 38 |
| Dej | Influent / Effluent TN | mg/L | 55 / 15 |
| Zog | hluav taws xob txhua xyoo | kWh/a | 255,000 |
| Zog | Unit zog | kWh/m³ | 0.70 |
| Tshuaj | NaClO (10%) | t/a | 75 |
| Tshuaj | PAC | t/a | 3.0 |
| Sludge | Wet sludge rau incineration | t/a | 220 |
Ib daim duab zoo tshaj plaws hauv lub rooj no yog chav siv hluav taws xob sivPEB 0.70 kWh/m³. Vim tias cov khoom siv biofilm hloov ib feem ntawm cov biomass raug tshem tawm, lub tshuab aeration tsis tas yuav ua kom muaj kev sib xyaw ua ke loj heev - cov khoom lag luam cawv raug tshem tawm, thiab tsis muaj daim nyias nyias scouring aeration txhua. Ib qho kev xaiv tsim ripples los ntawm tag nrho cov pa roj carbon tshuav.
Cov txiaj ntsig Carbon Accounting
Tag Nrho Txhua Xyoo Emissions: 182.15 t CO2-eq
Table 2 rhuav tshem cov khoom siv hauv tsev cog khoom los ntawm qhov chaw thiab thaj chaw. Cov pa roj carbon ntau ua haujlwm rau0.50 kg CO2-eq/m³- ib daim duab piv rau kev kho dej khib nyiab hauv nroog, uas yog qhov zoo tshaj plaws vim tias muaj kev phom sij ntau dua ntawm cov kwj dej.
| Qeb | Qhov chaw | CO2-eq (t/a) | Qhia tawm (%) |
| Ncaj qha | Txheej txheem CH4 | 22.68 | 12.45 |
| Ncaj qha | Process N2O | 10.60 | 5.82 |
| Tsis ncaj | Hluav taws xob | 145.43 | 79.85 |
| Tsis ncaj | Tshuaj | 1.30 | 0.71 |
| Tsis ncaj | Sludge thauj | 1.14 | 0.63 |
| Tsis ncaj | Lwm yam indirect | 1.00 | 0.54 |
| Tag nrho | Tag nrho txhua xyoo emission | 182.15 | 100.0 |
Daim ntawv qhia muaj pes tsawg leeg hauv qab no ua rau zaj dab neeg pom: ib qhov chaw dominates, thiab nws yog cov tswv lag luam tuaj yeem tswj tau.
Cov ntsiab lus tseem ceeb ntawm Cov Khoom Muag
1. Hluav Taws Xob Dominates ntawm 79.85%
NtawmPEB 0.70 kWh/m³, lub zog lub zog ntawm lub cev yog qhov pom tseeb qis dua li cov tshuab membrane, uas yuav tsum tau siv lub zog ntxiv rau cov membrane scouring aeration. Qhov concentration ntawm emissions nyob rau hauv ib zaug, zoo- nkag siab qeb txhais tau hais tias kev txhim kho aeration efficiency tawm tsam qhov loj tshaj plaws ncaj qha - txhua kilowatt-teev khaws tseg muaj txiaj ntsig sai, ntsuas cov pa roj carbon monoxide.
2. Direct GHG Emissions yog Thib Ob -Qhov loj tshaj ntawm 18.27%
Cov txheej txheem CH₄ (12.45%) thiab N₂O (5.82%) muaj peev xwm ua kom lub ntiaj teb sov siab siab - N₂O yog kwv yees li 273 npaug CO₂ tshaj 100 xyoo. Cov no yog tsim nyob rau hauv cov txheej txheem lom nws tus kheej. Qhov kev tshawb pom yog qhov ua tau: kev ua kom zoo tshaj plaws uas sib npaug ntawm cov pa oxygen thiab cov nqi rov ua haujlwm tuaj yeem txhim kho kev tshem tawm nitrogen thiab txo qis N₂O tiam, txiav cov pa phem thiab cov pa roj carbon hneev taw.
3. Chemical Carbon Footprint Nyob ze -Xoom ntawm 0.71%
Lub kaw lus tsuas yog siv sodium hypochlorite rau kev tua kab mob thiab PAC rau coagulation. Muajtsis muaj membrane tu tshuaj thovntawm tag nrho - qhov zoo ntawm cov khoom siv biofilm hla cov membranes. Qhov no ua rau cov tshuaj carbon footprint dhau11 npaug qistshaj qhov sib npaug MBR system.
4. Sludge pov tseg yog me me ntawm 1.17%
Cov sludge ntub xa mus rau incineration tsuas yog 1.17% ntawm tag nrho cov pa roj carbon. Qhov qis sludge tawm los ntawm MBBR cov tshuab, uas tau tsav los ntawm qhov qeeb - loj hlob biofilm feem, ua rau cov nqi qis qis thiab cov pa tawm.
MBBR Vs MBR: A 66% Carbon Advantage
Cov pov thawj tseem ceeb tshaj plaws yog los ntawm kev sib piv ncaj qha. Kev tshawb fawb tsis ntev los no ntawm MBR tsev kho mob systems (He Junqing li al.) tau tshaj tawm cov pa roj carbon ntau rau kev sib piv, thiab qhov sib txawv yog qhov txaus ntshai:
| Qhov taw qhia | MBBR (qhov kev tshawb fawb no) | MBR (cov ntaub ntawv) | Qhov txawv |
| Cov pa roj carbon ntau (kg CO2-eq / m³) | 0.50 | 1.47 ± 0.30 | MBBR ~ 66% qis dua |
| Lub hwj chim (kWh / m³) | 0.70 | 0.93 ± 0.25 | MBBR ~ 25% qis dua |
| Hluav taws xob carbon share (%) | 79.85 | 62.29 | - |
| Chemical carbon share (%) | 0.71 | 7.98 | MBR 11 × siab dua |
| Sludge pov tseg share (%) | 1.17 | 0.51 | - |
Ob lub tshuab piav qhia qhov zoo. Ua ntej,zog efficiency: ntawm 0.70 piv rau 0.93 kWh/m³, MBBR zam qhov siab - siv cov membrane scouring aeration uas MBR systems tsis tuaj yeem nyob yam tsis muaj. Thib ob,tshuaj tshem tawm: daim nyias nyias xav tau tshuaj ntxuav ib ntus nrog cov khoom sib txuam -carbon thiab thauj hneev taw, thaum MBBR muaj xoom membrane tu thov. Ob qho xwm txheej sib xyaw kom xa cov 66% carbon txo.
Txoj Kev Rau Kev Txo Cov Carbon ntxiv
Cov ntawv qhia zaub mov tseem taw qhia txoj hauv kev mus tom ntej. Peb qhov kev hloov kho tshiab tuaj yeem thawb lub kaw lus qis dua:
Aeration upgrades.Hloov cov hauv paus blowers nrog sib nqus levitation blowers, ua ke nrog yaj oxygen (DO) tawm tswv yim tswj, tuaj yeem txiav cov emissions loj tshaj plaws ntawm nws qhov chaw los ntawm kev sib piv cov khoom siv aeration rau tiag tiag - lub sijhawm thov.
Txheej txheem optimization.Fine-tuning DO setpoints thiab recirculation ratios suppresses N₂O tiam, ncaj qha txo tus nqi ntawm 5.82% pab los ntawm lub hwj chim tsev cog khoom roj.
Lub zog tauj dua tshiab.Rooftop hnub ci photovoltaic kev pab them nqi tsuas yog 10% ntawm kev thov yuav txo qis14.5 t CO₂ / xyoo- ib qho ntxim nyiam, pom cov kauj ruam mus rau lub vas -zero tsev kho mob tsev kawm ntawv.
Ntsiab Cai
MBBR yog ib qho khoom siv tsawg tsawg - carbon tov rau cov dej khib nyiab hauv tsev kho mob, xa0.50 kg CO2-eq/m³- piv rau kev kho mob hauv nroog txawm tias muaj kev phom sij ntau dua.
Cov66% carbon zoo dua MBRyog tsav los ntawm kev tshem tawm cov tshuaj membrane thiab qis zog thov, tsis yog los ntawm kev txi kev kho mob.
Hluav taws xob yog lub zog tseem ceeb ntawm 79.85%, yog li kev txhim kho aeration muaj qhov cuam tshuam ncaj qha, muaj nuj nqis.
Qhov ze -zero chemical carbon footprint (0.71%) yog qhov txawv, nyuaj-rau- rov ua kom zoo dua.
Direct GHG emissions (18.27%) tsim nyog tau txais kev saib xyuas tshwj xeeb hauv cov txheej txheem tsim, vim lawv yog cov teb zoo tshaj plaws rau kev ua haujlwm kho.
Xaus
Qhov tseeb no - rooj plaub hauv ntiaj teb no qhia tau tias MBBR tuaj yeem kho cov dej khib nyiab hauv tsev kho mob nyuaj thaum tuav cov pa roj carbon hneev taw66% qis dua qhov sib npaug MBR systems. Kev sib xyaw ua ke ntawm kev siv hluav taws xob qis dua, cov tshuaj xoom membrane, thiab kev kho mob zoo ua rau MBBR yog qhov kev xaiv zoo rau cov dej khib nyiab kho mob - tshwj xeeb tshaj yog rau cov thawj coj hauv tsev thiab cov kws tsim qauv tsim uas yuav tsum ua kom tau raws li kev kho mob thiab cov koom haum carbon- txo cov hom phiaj tib lub sijhawm.
Txiav Tsev Kho Mob Wastewater Carbon Footprint los ntawm 66%
Ib qho A/O-MBBR system kho cov dej khib nyiab hauv tsev kho mob ntawm 0.50 kg CO2-eq/m3 - ob-feem peb qis dua li MBR. Saib yuav ua li cas Juntai MBBR media muab kev kho raws, cov pa roj carbon tsawg rau koj qhov chaw.