Los ntawm lub chaw soj nstuam mus rau loj- nplai daim ntawv thov ntawm 300,000 m³ / d, lub tshuab no yuav daws qhov teeb meem ntawm denitrification hauv cov dej khib nyiab li cas nrog cov pa roj carbon tsawg- rau- nitrogen ratio?
Rau cov neeg ua haujlwm hauv kev lag luam kho dej khib nyiab, tam sim no muaj kev sib tw dual: ntawm ib sab, cov qauv kev tso dej pov tseg hauv nroog tau nrawm nrawm, nrog rau ib txwm muaj - yuav tsum tau nce ntxiv rau kev tshem tawm tag nrho cov nitrogen thiab phosphorus tag nrho, ua rau kev denitrification heev yog qhov tsim nyog rau kev lag luam; Ntawm qhov tod tes, cov pa roj carbon tsawg- rau- nitrogen piv yog muaj nyob rau hauv nroog cov dej khib nyiab hauv Suav teb. Cov txheej txheem ib txwm cia siab rau sab nraud cov pa roj carbon monoxide los xyuas kom meej qhov ua tau zoo ntawm denitrification, uas tsis yog tsuas yog ua rau cov nqi khiav lag luam tab sis kuj ua rau cov pa roj carbon emission siab ntxiv, uas cuam tshuam rau "dual-carbon" lub hom phiaj ntawm lub hom phiaj.
Hauv cov txheej txheem AAO ib txwm muaj, feem ntau ntawm cov organic carbon hauv cov dej khib nyiab pov tseg los ntawm aeration thiab oxidation nyob rau hauv aerobic theem, tawm hauv cov pa roj carbon tsis txaus rau denitrification, ua rau nws nyuaj rau kev ua kom tau raws li kev lag luam kev hloov pauv kev xav tau ntawm "kev txhim kho zoo thiab kev ua haujlwm + txo cov pa phem thiab carbon emissions." Cov txheej txheem Anaerobic -Oxic-Anoxic (AOA) sai sai, nrog nws lub zog tseem ceeb ntawm kev ua tiav cov nitrogen thiab phosphorus sib sib zog nqus tshem tawm yam tsis muaj lwm cov pa roj carbon monoxide, tau maj mam txav los ntawm kev tshawb fawb hauv chav kuaj mus rau qhov loj -scale engineering xyaum, dhau los ua qhov zoo tshaj plaws "dub nees" hauv kev lag luam kho dej khib nyiab.
Core Decryption: Tsuas yog Kev Hloov Hauv Kev Txiav Txim Siab, Dab tsi yog Khawv koob ntawm AOA?
Ntau tus neeg xav tsis thoob vim li cas AOA, piv rau cov txheej txheem AAO ib txwm muaj, tsuas yog thim rov qab qhov kev txiav txim ntawm "aerobic" thiab "anoxic," ua tiav qhov kev ua tau zoo. Cov lus teb yog nyob rau hauv nws qhov tshwj xeeb "thawj lub khw, tom qab ntawd siv" cov pa roj carbon monoxide -tsav nitrogen thiab phosphorus tshem tawm mechanism.
Ib txwm AAO (Anaerobically-Anaerobic-Aerobic) cov txheej txheem siv anaerobic-anoxic-aerobic ntws. Feem ntau ntawm biodegradable organic carbon qhov chaw nyob rau hauv cov dej khib nyiab yog indiscriminately oxidized thiab decomposed thaum lub sij hawm aeration nyob rau hauv lub aerobic theem. Cov pa roj carbon tsawg heev yog muaj rau denitrification nyob rau theem anoxic, yuam kom ntxiv cov pa roj carbon monoxide xws li sodium acetate los ua qhov sib txawv, tsim kom muaj lub voj voog tsis zoo ntawm "cov pa roj carbon ntau tsawg, qhov ntau lawv ntxiv; tus nqi siab dua, cov pa roj carbon ntau dua."
Nyob rau hauv sib piv, cov txheej txheem AAO, nrog nws peb -theem anaerobic-aerobic-anoxic layout, tag nrho restructures cov pa roj carbon qhov chaw siv txoj kev, kom ntseeg tau tias txhua txhua carbon qhov chaw siv tau zoo:
1. Theem Anaerobic: Tau qhov twg los-Based Carbon Locking
Lub biodegradable COD nyob rau hauv lub zog yog qhov zoo dua hloov mus rau hauv cov pa roj carbon monoxide xws li PHA thiab khaws cia hauv cov kab mob. Qhov no tseem ceeb npaj "cov mos txwv denitrification" rau cov kab mob ua ntej, tiv thaiv cov pa roj carbon pov tseg los ntawm qhov chaw.
2. Aerobic Theem: Precision Nitrification
Cov theem no ua tiav tag nrho cov txheej txheem nitrification rau ammonia nitrogen. Nyob rau tib lub sijhawm, los ntawm kev tswj hwm lub sijhawm aeration thiab yaj cov pa oxygen concentration, nws tiv thaiv oxidation ntau dhau ntawm cov pa roj carbon monoxide uas khaws cia hauv cov kab mob, ua kom muaj peev xwm txaus rau cov denitrification tom ntej.
3. Tshaj tawm -Anoxic Theem: Endogenous Denitrification
Cov kab mob no siv lawv cov khoom ua ntej- khaws cia hauv cov pa roj carbon monoxide los ua kom tiav qhov denitrification ntawm nitrate nitrogen. Tag nrho cov txheej txheem tsis cia siab rau cov pa roj carbon monoxide sab nraud, hauv paus daws qhov kev mob ntawm kev lag luam ntawm cov pa roj carbon tsis txaus nyob rau hauv qis -carbon- rau -nitrogen piv cov dej khib nyiab.
Hardcore Verification: Los ntawm 100,000 mus rau 300,000 m³ / d, cov haujlwm no tau ua tiav thiab tab tom qhia cov txiaj ntsig.
Kev ua tau zoo ntawm kev siv thev naus laus zis tau ua pov thawj los ntawm kev coj ua engineering. Tam sim no, cov txheej txheem AOA tau siv rau hauv qhov loj hauv cov chaw kho dej khib nyiab hauv ntau lub nroog thoob plaws Suav teb, suav nrog ntau yam xwm txheej xws li cov haujlwm tshiab, hloov kho dua tshiab, cuam tshuam rau lub caij los nag, thiab kev ua haujlwm kub tsawg, ua rau muaj kev ntseeg siab heev.
Cov txiaj ntsig kev tsim khoom pom tau hais tias txawm tias nyob rau hauv huab cua huab cua nrog cov dej ntim ntau tshaj 202%, cov dej ntws zoo ntawm cov txheej txheem AOA tsis muaj qhov cuam tshuam loj heev: tshem tawm cov nqi ntawm ammonia nitrogen, tag nrho cov nitrogen, thiab phosphorus tag nrho tsuas yog ntsib me me, tswj tau qhov hloov pauv, thiab cov effluent concentrations tseem nyob hauv cov qauv. Los ntawm kev kho cov thawj sludge rov qab piv, huab cua - mus rau - dej piv, thiab sludge concentration, lub kaw lus tuaj yeem rov qab mus rau qhov kev ua haujlwm ruaj khov, zoo kawg nkaus hloov mus rau qhov nyuaj ntawm cov dej ntim loj hloov pauv thaum lub caij los nag.
Tag Nrho-Scenario Adaptability: Tau tshaj nrog Retrofits, Kov Tsawg-Tsuas Ua Haujlwm Kub
Dhau li ntawm cov haujlwm tshiab, AOA cov txheej txheem tseem qhia tau tias muaj kev sib raug zoo hauv kev txhim kho cov dej khib nyiab uas twb muaj lawm. Tom qab ua tiav 1500 m³ / d ORBAL oxidation ditch- AOA txheej txheem retrofit ntawm lub chaw kho dej khib nyiab hauv Chongqing, tag nrho cov nitrogen tshem tawm tau nce los ntawm 71.52% ntawm cov txheej txheem AAO qub rau 83.01% yam tsis tas yuav tsum muaj cov pa roj carbon monoxide sab nraud, thiab kev tshem tawm cov teebmeem ntawm COD, tag nrho cov pa nitrogen, thiab amm zoo dua. cov txheej txheem ib txwm ua.
Hais txog qhov mob ntawm kev lag luam ntawm kev txo qis denitrification kev ua haujlwm vim qhov kub ntawm lub caij ntuj no nyob rau sab qaum teb / toj siab, 40,000 m³ / d AOA txheej txheem dej khib nyiab hauv Guiyang, ua haujlwm rau 430 hnub nyob rau hauv cov xwm txheej ntawm cov dej kub qis li 11 degree, tseem ua tiav 40% nitrogen tshem tawm cov txiaj ntsig hauv nws qhov chaw ruaj khov ntawm tag nrho cov khoom siv hluav taws xob nrog cov khoom siv hluav taws xob hauv qab no: 4.13 mg/l. Piv nrog rau AAO txheej txheem dej khib nyiab kho cov nroj tsuag nrog tib qhov muaj txiaj ntsig, effluent tag nrho cov nitrogen raug txo los ntawm 54.62%, kev siv roj ntsha roj ntsha tau txo los ntawm 24%, kev siv tshuaj lom neeg los ntawm 39%, thiab sludge ntau lawm los ntawm 7%.
Tshaj li Cov Qauv Sib Tham: Kev Txhim Kho Yav Tom Ntej ntawm Cov Txheej Txheem AOA
Tam sim no, cov txheej txheem AOA tau tsim cov txheej txheem kev ua tiav, tab sis nws lub peev xwm nthuav dav dhau qhov ntawd. Txhawm rau ua kom tau raws li kev lag luam kev kho dej khib nyiab txoj kev loj hlob xav tau rau kev siv hluav taws xob qis thiab qis carbon emissions, kev lag luam tau pib tshawb nrhiav kev koom ua ke ntawm AOA txheej txheem nrog cov thev naus laus zis tshem tawm nitrogen tshiab txhawm rau tshawb nrhiav kev txhim kho thev naus laus zis.
Ntau qhov kev tshawb fawb tau pom tias qhov kev sib txuas ntawm AOA (Automatic Aeration) thev naus laus zis nrog luv luv - txiav nitrification thiab anaerobic ammonium oxidation (ANAO) technologies nthuav tawm tshwj xeeb nitrogen tshem tawm kev ua haujlwm hauv nroog kev kho dej khib nyiab nrog qis COD / TN ratios: luv luv - txiav nitrification- kev ua haujlwm ruaj khov ntawm ANAO, tom qab kev ua haujlwm ruaj khov effluent tag nrho nitrogen concentration tsawg li 2.3 mg / L, nrog tag nrho cov nitrogen tshem tawm tus nqi siab li 95.8%; Kev hloov kho AOA txuas ntxiv mus, nyob rau hauv cov xwm txheej uas qhov muaj txiaj ntsig COD / TN piv yog qis li 3.2, ua tiav cov txiaj ntsig kev kho mob siab heev nrog TN (4.6 ± 1.5) mg / L thiab tag nrho phosphorus (0.2 ± 0.2) mg / L, nrog ANAO-coupled nitrogen tshem tawm% {1} accounting rau tshaj nitrogen.
Cov kev tshawb fawb no muab qhov tsis muaj kev txwv rau yav tom ntej kev paub txog zero -zero carbon qhov chaw thiab zero -zero zog siv cov dej khib nyiab siv cov txheej txheem AOA, thiab tseem muab kev txhawb nqa thev naus laus zis rau qis - carbon transformation ntawm kuv lub teb chaws txoj kev kho dej khib nyiab.
Xaus
Los ntawm kev daws qhov teeb meem ntawm lub fwj ntawm nitrogen tshem tawm ntawm cov dej khib nyiab nrog cov pa roj carbon tsawg - mus rau - nitrogen piv rau kev hloov mus rau kev lag luam kev hloov pauv xav tau ntawm "kev txhim kho kev ua haujlwm zoo los ntawm kev txo cov pa phem thiab txo qis," AOA txheej txheem tau qhia nws cov txiaj ntsig tseem ceeb hauv kev kho dej khib nyiab los ntawm cov txiaj ntsig engineering. Nrog kev siv thev naus laus zis tsis tu ncua thiab loj- kev txhawb nqa loj, cov txheej txheem AOA tau dhau los ua cov kev daws teeb meem zoo tshaj plaws rau kev tsim kho thiab txhim kho cov chaw kho dej khib nyiab hauv nroog hauv kuv lub tebchaws, ua rau kev lag luam hloov pauv tsis tu ncua los ntawm "kev sib ntsib cov qauv emission" mus rau qib siab - kev txhim kho zoo ntawm "ntsuab, qis- carbon, thiab txhim kho kev ua haujlwm zoo.