Kev Tshawb Fawb Txog Kev Txuag Zog thiab Kev Txo Carbon ntawm Aeration Systems hauv Kev Kho Dej Nroj Tsuag
Txog thaum kawg ntawm 2020, Tuam Tshoj muaj 4,326 lub nroog- theem thiab siab dua cov chaw kho dej khib nyiab (WWTPs), kho 65.59 billion cubic meters ntawm cov dej khib nyiab txhua xyoo, nrog rau kev siv hluav taws xob txhua xyoo ntawm 33.77 billion kWh, suav txog 0.45% ntawm kev siv hluav taws xob hauv teb chaws. Xyoo 2020, chav tsev hluav taws xob siv ib lub cubic meter ntawm cov dej kho yog 0.405 kWh / m³ rau WWTPs ua raws qib A tus qauv lossis siab dua ntawm "Tshem Tawm Ntawm Cov Khoom Siv Hluav Taws Xob rau Kev Kho Dej Hauv Nroog" (GB 18918-2002), thiab 0.375 Grade A cov qauv hauv qab no ho siab dua qhov nruab nrab hauv cov teb chaws tsim kho. Txawm hais tias qhov nruab nrab muaj kuab paug nyob rau hauv Suav WWTPs tsawg dua 50% ntawm cov uas nyob rau hauv cov teb chaws tsim, chav tsev hluav taws xob noj ib pa paug tawm yog tsawg kawg yog 100% siab dua. Yog li ntawd, tseem muaj peev xwm tseem ceeb rau kev txuag hluav taws xob thiab txo cov pa roj carbon monoxide hauv Tuam Tshoj WWTPs.
Cov pa roj carbon emissions los ntawm WWTPs suav nrog kev tso tawm ncaj qha thiab tsis ncaj. Raws li "Technical Specification for Low-Carbon Operation Evaluation of Wastewater Treatment Plants" (T/CAEPI 49-2022), direct carbon emissions feem ntau muaj CH₄, N₂O, thiab CO₂ los ntawm fossil fuel combustion. Indirect emissions suav nrog cov khoom siv hluav taws xob, hluav taws xob, thiab tshuaj lom neeg. Raws li tau hais los ntawm Intergovernmental Panel on Climate Change (IPCC), CO₂ emissions from the biological degradation process in wastewater treatment is not include in the carbon emission accounting. Ntawm ntau cov pa roj carbon emissions hauv WWTPs, kev siv hluav taws xob muaj txiaj ntsig zoo tshaj plaws. Jiang Fuhai li al., raws li tus qauv ntawm 10 WWTPs, pom tias qhov hnyav ntawm kev siv hluav taws xob rau cov pa roj carbon emissions li ntawm 31% mus rau 64%. Hu Xiang li al., txheeb xyuas 22 WWTPs nyob rau hauv Chaohu Lake phiab, qhia tias carbon emissions los ntawm hluav taws xob noj accounting rau 61.55% mus rau 73.56%. Qhov qis dua qhov muaj zog concentration thiab siab dua tus qauv effluent, qhov ntau dua ntawm cov pa roj carbon emissions ncaj qha, tshwj xeeb tshaj yog los ntawm kev siv hluav taws xob. Aeration systems siv ntau dua 50% ntawm WWTP tag nrho cov hluav taws xob. Kev ua haujlwm zoo ntawm cov tshuab aeration ncaj qha cuam tshuam rau kev tshem tawm nitrogen thiab phosphorus. Ntau dhau aeration ua rau tsis tsim nyog noj cov pa roj carbon monoxide hauv cov dej khib nyiab, txo cov kev ua haujlwm ntawm cov roj ntsha nitrogen thiab phosphorus tshem tawm, yog li ua kom cov pa roj carbon ntau ntxiv thiab cov tshuaj phosphorus tshem tawm, uas ua rau cov pa roj carbon emissions los ntawm kev siv tshuaj lom neeg. Yog li ntawd, kev txuag hluav taws xob hauv cov tshuab aeration yog qhov tseem ceeb rau kev txo cov pa roj carbon monoxide hauv WWTPs, ua kev tshawb fawb txog kev siv hluav taws xob txuag hluav taws xob tseem ceeb heev.
1. Qhov laj thawj rau kev siv hluav taws xob siab hauv Aeration Systems ntawm Suav WWTPs
1.1 Qhov tseeb Load yog qis dua tsim Load
Tsawg influent load muaj xws li ob qho tib si qis tus nqi thiab cov pa phem concentration tsawg. Nws yog ib qho tseem ceeb ua rau ntau dhau aeration. Tshaj - aeration tsis tsuas yog nce hluav taws xob xwb tab sis kuj ua rau ntau dhau depletes endogenous carbon qhov chaw nyob rau hauv cov dej khib nyiab thiab elevates yaj oxygen concentrations nyob rau hauv anaerobic thiab anoxic tso tsheb hlau luam, impairing nitrogen thiab phosphorus tshem tawm. Qhov no yuav tsum tau ntau npaum li cas ntawm cov pa roj carbon thiab phosphorus tshem tawm cov tshuaj, tsa cov pa roj carbon emissions.
1.1.1 Tsawg Flow Rate
Feem ntau, hauv thawj xyoo tom qab WWTP kev tsim kho, cov dej ntws feem ntau tsis tuaj yeem ncav cuag lub peev xwm tsim vim kev lag luam hauv nroog loj lossis kev tsim kho cov kav dej. Tsis tas li ntawd, nyob rau hauv cov kav dej ua ke los yog cov cheeb tsam uas muaj cov dej nag cua hnyav thiab cov dej phwj tuaj sib xyaw, qhuav - huab cua ntws qis dua ntub - huab cua ntws, ua rau muaj kev hloov pauv loj. Qhov no xav tau kev tswj kom meej dua thiab tswj cov nqi aeration; txwv tsis pub, dhau- aeration thaum lub sij hawm qis - lub sij hawm ntws yog qhov tshwm sim, cuam tshuam rau carbon, nitrogen, thiab phosphorus tshem tawm efficiency thiab ua kom muaj hluav taws xob thiab tshuaj noj.Daim duab 1qhia txog qhov sib txawv ntawm kev kho dej khib nyiab hauv Changsha City ntawm lub caij qhuav thiab ntub dej. Kev ntub dej - lub caij kho mob yog 30% -40% siab dua thaum lub caij qhuav. Kev hloov pauv raws caij nyoog hauv kev kho ntim yuav tsum muaj kev tswj hwm lub tshuab aeration.
1.1.2 Tsawg Influent Concentration
Qhov tseeb muaj kuab paug nyob rau hauv Tuam Tshoj lub nroog WWTPs feem ntau qis dua tus nqi tsim. Hauv WWTP tsim, kev ua tau zoo yog feem ntau yog nyob ntawm nruab nrab - mus rau -ntev- lub sijhawm kwv yees nrog cov kav dej ua tiav. Raws li "Standard for Design of Outdoor Wastewater Engineering" (GB 50014-2021), tsib-hnub biochemical oxygen xav tau (BOD₅) rau cov dej khib nyiab hauv tsev yog xam ntawm 40–60 g/(person·d), feem ntau noj 40 g/(person·d). Nrog rau ib tus neeg cov dej khib nyiab tawm ntawm 200-350 L / (tus neeg·d) hauv ntau lub nroog, qhov tsim BOD₅ concentration feem ntau yog li ntawm 110 txog 200 mg / L. Kev txheeb xyuas qhia tau tias 68% ntawm WWTPs hauv Suav teb muaj qhov tseeb txhua xyoo nruab nrab muaj peev xwm BOD₅ qis dua 100 mg / L, nrog 40% muaj qhov nruab nrab txhua xyoo qis dua 50 mg / L. Los ntawm qhov kev xav ntawm qhov muaj zog concentration piv rau qhov xav tau aeration, feem ntau Suav WWTPs muaj cov tshuab aeration tsim nrog "tswj lub cev muaj zog rau lub laub me" qhov xwm txheej - teeb tsa nrog siab - muaj peev xwm blowers thaum qhov kev xav tau huab cua tsawg. Qhov kev teeb tsa no yooj yim ua rau dhau aeration thiab siv zog ntau ntxiv.
1.2 Kev teeb tsa tsis tsim nyog ntawm Aeration Equipment Quantity
Ntau WWTPs tau teeb tsa tsis tsim nyog rau tus lej ntawm cov cuab yeej siv aeration vim tsis suav nrog qhov tsis tshua muaj - thauj khoom ua haujlwm. Piv txwv li, ntau qhov me me thiab nruab nrab- loj WWTPs feem ntau teeb tsa lub tshuab ua haujlwm hauv "2 lub luag haujlwm + 1 standby" (tag nrho 3) teeb tsa hauv chav tshuab blower, uas yog qhov zoo nyob rau hauv cov qauv tsim thiab cov xwm txheej zoo. Txawm li cas los xij, nyob rau hauv cov xwm txheej qis qis, kev khiav hauj lwm txawm tias ib lub tshuab hluav taws xob ntawm nws qhov kev tso tawm yam tsawg kawg nkaus yuav ua rau ntau tshaj - aeration thiab nce zog noj. Thaum txhim kho qhov sib txawv zaus tsav (VFDs) lossis lwm txoj kev los txo cov pa cua tuaj yeem zam dhau - aeration, cov kev ntsuas no tuaj yeem hloov lub tshuab ua haujlwm kom deb ntawm nws qhov siab - cheeb tsam ua haujlwm, txo kev ua haujlwm thiab nkim zog. Muab qhov feem ntau muaj kev cuam tshuam tsis zoo, cov tswv yim xws li nce tus naj npawb ntawm cov tshuab cua thaum txo tus kheej lub peev xwm yuav tsum raug txiav txim siab kom ua tau raws li cov kev xav tau ntawm huab cua hauv lub sijhawm qis - lub sijhawm thauj khoom. Raws li keeb kwm, kev siv nyiaj tsawg thiab tus nqi siab ntawm cov khoom tuaj txawv teb chaws siab - cov tshuab ua haujlwm tau ua rau tsawg dua - units configurations. Nrog rau kev loj hlob ntawm domestic high{17}}kev ua tau zoo tshuab tshuab thiab txo cov nqi, cov kev mob tam sim no tau txais txiaj ntsig zoo rau kev txhim kho lub tshuab blower kom ua tiav lub zog txuag thiab txo qis carbon.
1.3 Tsawg Efficiency ntawm Aeration Equipment
Qee qhov qub WWTPs, ua nrog cov thev naus laus zis ntawm lawv lub sijhawm, siv tsawg-kev ua tau zoo, siab-zog- cov khoom siv aeration. Los ntawm cov qauv siv thev naus laus zis thiab kev siv hluav taws xob tam sim no, cov cuab yeej zoo li Roots blowers, multi-theem qis-ceev centrifugal blowers, disc aerators, thiab txhuam aerators raug suav hais tias qis-kev ua tau zoo, feem ntau yog li ntawm 40% mus rau 65% efficiency-15}gal fugal tshuab tam sim no 40% {10% qis dua. Tsis tas li ntawd, hauv WWTPs siv cov txheej txheem zoo- npuas diffused aeration hauv Anaerobic-Anoxic-Oxic (A₂/O) lossis Anoxic-Oxic (A/O) cov txheej txheem, kev laus lossis txhaws ntawm cov diffusers txo cov pa xa mus rau kev ua haujlwm thiab ua kom lub zog ua haujlwm, yog li nce lub zog noj.
1.4 Kev teeb tsa tsis tsim nyog ntawm cov khoom sib xyaw hauv cov tank lom neeg
Nyob rau hauv oxidation ditches nrog nto aerators, cov cuab yeej pab ob qho tib si aeration thiab sib tov / thawb lub zog. Qhov no yog ib tug tsim nyog tsim nyob rau hauv tsim load tej yam kev mob. Txawm li cas los xij, nyob rau hauv qis - load tej yam kev mob, txo los yog nres aeration tej zaum yuav tsim nyog, tab sis yuav tsum tau tiv thaiv sludge nyob los yog kua- sib cais, txaus khiav ceev yuav tsum tau tswj, yuam mus txuas ntxiv ua hauj lwm ntawm aerators thiab ua rau over- aeration, tsis zoo nutrient tshem tawm, thiab lub zog pov tseg. Rau ntau lub zog- ua haujlwm tau zoo ntawm cov khoom qis, oxidation ditches yuav tsum tau nruab nrog cov khoom sib xyaw submersible zoo.
Hauv A₂/O thiab A/O cov txheej txheem, cov tso tsheb hlau luam aerobic feem ntau yog them tag nrho nrog zoo - npuas diffusers yam tsis muaj kev sib xyaw ua ke, tso siab rau kev ua kom txaus los tiv thaiv kev daws teeb meem. Nyob rau hauv qis loads, txo aeration los yog siv ib ntus aeration kom tsis txhob over- aeration yuav yooj yim ua rau sludge nyob, cuam tshuam rau kev kho mob. Txhawm rau ua haujlwm tau zoo dua ntawm cov khoom qis, A₂ / O thiab A / O aerobic tso tsheb hlau luam yuav tsum xav txog kev ntxiv cov khoom sib xyaw kom haum.
2. Kev Siv Hluav Taws Xob rau Kev txuag hluav taws xob thiab txo qis carbon hauv WWTP Aeration Systems
2.1 Hloov nrog High -Efficiency Aeration Equipment
WWTPs tseem siv tsawg- cov cuab yeej siv tau zoo xws li cov hauv paus tshuab tshuab, ntau- theem qis-ceev centrifugal blowers, disc aerators, los yog txhuam aerators, los yog cov uas muaj hnub nyoog hnyav thiab cov khoom siv tsis tau zoo, yuav tsum ua cov kev ntsuas kev siv hluav taws xob los ntawm lub zog -txuag thiab carbon{5}} hloov pauv raws sijhawm, kev ua tau zoo dua qub qauv. Tam sim no, siab -ceev blowers zoo li ib zaug -theem siab-ceev centrifugal blowers, sib nqus bearing blowers, thiab cua bearing blowers siv nyob rau hauv loj WWTPs feem ntau khav tau zoo ntawm 80% thiab 85%. Txawm li cas los xij, kev ua lag luam tam sim no tsis muaj me me - muaj peev xwm siab -ceev centrifugal blower khoom. WWTPs nrog lub peev xwm qis dua 2,000 m³ / d tseem cia siab rau cov cuab yeej siv tsawg dua li cov hauv paus tshuab, nrog cov txiaj ntsig feem ntau ntawm 40% thiab 65%, qhia tias muaj peev xwm txhim kho. Yog li ntawd, tsim kom muaj txiaj ntsig zoo me me - cov cuab yeej aeration yog qhov muaj txiaj ntsig rau kev txuag hluav taws xob thiab txo cov pa roj carbon tsawg hauv WWTPs me.
2.2 Kev hloov pauv los ntawm Nto Aeration mus rau Fine-Bubble Diffused Aeration
Muab cov dej tob kom haum, zoo - npuas diffused aeration yog lub zog ntau dua -ntau tshaj qhov aeration. Hloov oxidation ditches los ntawm qhov chaw kom zoo- npuas diffused aeration tuaj yeem ua rau lub zog zoo- txuag tau. Los ntawm kev siv retrofit tej yaam num, xws li kev hloov pauv tsis tau tsuas yog ua tiav kev txuag hluav taws xob tseem ceeb tab sis kuj txhim kho kev tshem tawm cov khoom noj lom lom. Chen Chao txoj kev tshawb fawb tau sau tseg tias tom qab ib qho WWTP hloov dua siab tshiab, tag nrho cov hluav taws xob siv tau txo los ntawm 24.7%, thaum tshem tawm cov nqi ammonia nitrogen, COD, thiab tag nrho phosphorus nce 30.39%, 5.39%, thiab 2.09%, feem. Xie Jici et al. qhia txog kev txuag hluav taws xob ntawm 0.09-0.12 kWh / m³ tom qab kev hloov pauv zoo sib xws, nrog kev txhim kho tseem ceeb hauv kev tshem tawm cov khoom noj lom lom. Hauv kev ua kom zoo- npuas aeration, oxygen hloov pauv kev ua tau zoo yog linearly zoo correlated nrog dej tob. Hauv qab ib qho tseem ceeb qhov tob, nws qhov kev ua tau zoo tuaj yeem qis dua qhov chaw aeration. Feem ntau, qhov dej tob tshaj 4 m yog qhov tsim nyog rau kev hloov oxidation ditches kom zoo - npuas diffused aeration.
3. Kev Siv Hluav Taws Xob rau Kev txuag hluav taws xob thiab txo cov pa roj carbon monoxide hauv WWTP Aeration Systems
3.1 Hloov nrog High -Efficiency Aeration Equipment
WWTPs tseem siv tsawg- cov cuab yeej siv tau zoo xws li cov hauv paus tshuab tshuab, ntau- theem qis-ceev centrifugal blowers, disc aerators, los yog txhuam aerators, los yog cov uas muaj hnub nyoog hnyav thiab cov khoom siv tsis tau zoo, yuav tsum ua cov kev ntsuas kev siv hluav taws xob los ntawm lub zog -txuag thiab carbon{5}} hloov pauv raws sijhawm, kev ua tau zoo dua qub qauv. Tam sim no, siab -ceev blowers zoo li ib zaug -theem siab-ceev centrifugal blowers, sib nqus bearing blowers, thiab cua bearing blowers siv nyob rau hauv loj WWTPs feem ntau khav tau zoo ntawm 80% thiab 85%. Txawm li cas los xij, kev ua lag luam tam sim no tsis muaj me me - muaj peev xwm siab -ceev centrifugal blower khoom. WWTPs nrog lub peev xwm qis dua 2,000 m³ / d tseem cia siab rau cov cuab yeej siv tsawg dua li cov hauv paus tshuab, nrog cov txiaj ntsig feem ntau ntawm 40% thiab 65%, qhia tias muaj peev xwm txhim kho. Yog li ntawd, tsim kom muaj txiaj ntsig zoo me me - cov cuab yeej aeration yog qhov muaj txiaj ntsig rau kev txuag hluav taws xob thiab txo cov pa roj carbon tsawg hauv WWTPs me.
3.2 Kev hloov pauv los ntawm Nto Aeration mus rau Fine-Bubble Diffused Aeration
Muab cov dej tob kom haum, zoo - npuas diffused aeration yog lub zog ntau dua -ntau tshaj qhov aeration. Hloov oxidation ditches los ntawm qhov chaw kom zoo- npuas diffused aeration tuaj yeem ua rau lub zog zoo- txuag tau. Los ntawm kev siv retrofit tej yaam num, xws li kev hloov pauv tsis tau tsuas yog ua tiav kev txuag hluav taws xob tseem ceeb tab sis kuj txhim kho kev tshem tawm cov khoom noj lom lom. Chen Chao txoj kev tshawb fawb tau sau tseg tias tom qab ib qho WWTP hloov dua siab tshiab, tag nrho cov hluav taws xob siv tau txo los ntawm 24.7%, thaum tshem tawm cov nqi ammonia nitrogen, COD, thiab tag nrho phosphorus nce 30.39%, 5.39%, thiab 2.09%, feem. Xie Jici et al. qhia txog kev txuag hluav taws xob ntawm 0.09-0.12 kWh / m³ tom qab kev hloov pauv zoo sib xws, nrog kev txhim kho tseem ceeb hauv kev tshem tawm cov khoom noj lom lom. Hauv kev ua kom zoo- npuas aeration, oxygen hloov pauv kev ua tau zoo yog linearly zoo correlated nrog dej tob. Hauv qab ib qho tseem ceeb qhov tob, nws qhov kev ua tau zoo tuaj yeem qis dua qhov chaw aeration. Feem ntau, qhov dej tob tshaj 4 m yog qhov tsim nyog rau kev hloov oxidation ditches kom zoo - npuas diffused aeration.
3.3 Intermittent Aeration Technology
Rau WWTPs uas muaj kev cuam tshuam tsis zoo, tsis tu ncua-flow intermittent aeration zoo daws teeb meem ntawm kev tshem tawm cov zaub mov tsis zoo thiab kev siv hluav taws xob ntau dhau los ntawm ntau tshaj - aeration. Nws koom nrog kev ua haujlwm tsis tu ncua thiab cov dej ntws tawm thaum lub tshuab aeration ua haujlwm hauv cov voj voog ntawm aeration on / off. Tom qab ARAKI li al.'s 1986 kev tshawb fawb ntawm kev sib tshuam aeration rau nitrogen tshem tawm hauv oxidation ditches, ntau tus kws tshawb fawb tau ua cov kev tshawb fawb sim. Hou Hongxun et al. tau ua tiav - ntsuas ntsuas hauv 100,000 m³ / d WWTP siv tas li- ntws sib quas ntus aeration nyob rau hauv oxidation ditch, ua tiav 20% nce nyob rau hauv tag nrho cov nitrogen tshem tawm, ib tug 49% nce nyob rau hauv tag nrho phosphorus tshem tawm, thiab ib tug 21% zog noj ntawm tag nrho cov nroj tsuag. He Quan li al., nyob rau hauv 40,000 m³ / d WWTP oxidation ditch sim siv 2-teev rau / 2- teev tawm lub voj voog, pom tias piv rau kev ua kom tsis tu ncua, kev sib cuam tshuam aeration txuag 42% hauv aeration zog, nce tag nrho cov nitrogen horus tshem tawm los ntawm 9% phos. lub caij ntuj no qis- qhov kub thiab txias. Zheng Wanlin li al., nyob rau hauv 40,000 m³/d WWTP A₂/O txheej txheem sim siv 3- teev nyob rau / 3-teev tawm lub voj voog, tuav ruaj khov tus qauv-ua raws li cov dej ntws zoo thaum txuag 18.3% hauv kev siv hluav taws xob. Tam sim no, daim ntawv thov tag nrho ntawm kev ua haujlwm tsis tu ncua ntawm aeration tseem txwv, nrog rau ntau qhov kev sib tw tseem tshuav.
Rau cov txheej txheem A₂/O siv zoo - npuas aeration, ob yam txwv tsis pub siv dav ntawm kev sib tshuam aeration. Ua ntej, siab -ceev centrifugal blowers tsim siab -decibel, suab nrov nrov thaum pib; nquag caij tsheb kauj vab rau kev ua haujlwm tsis tu ncua ua rau muaj suab nrov. Thib ob, nquag pib- nres voj voog rau cov hlau nplaum / cov kabmob cua tshuab ua rau cov kabmob uas tsis yog-cov kabmob tiv tauj mus rau lub tsev, yooj yim ua rau cov kabmob puas tsuaj, nce qhov tsis ua haujlwm, thiab txo lub neej.
Thaum siv cov aeration sib quas ntus rau oxidation ditches lossis A₂/O cov txheej txheem, kev sib xyaw kom txaus thaum lub sij hawm tsis yog - aeration lub sij hawm yuav tsum tau ua kom ntseeg tau, muaj peev xwm xav tau cov khoom sib tov ntxiv los tiv thaiv cov sludge. Ammonia nitrogen concentrations tuaj yeem nce sai heev thaum lub sij hawm tsis yog - aeration, pheej hmoo siab tshaj tam sim ntawd. Yog li, kev tshawb fawb ntxiv yog xav tau los tsim kev tshawb fawb thiab kho lub voj voog aeration, zoo dua txhim kho kev txuag hluav taws xob thiab kev tshem tawm cov pa phem thaum tsis txhob muaj ammonia nitrogen ntau dhau.
WWTPs 'kev txhawj xeeb txog qhov muaj peev xwm instantaneous ammonia nitrogen ntau dhau yog qhov teeb meem loj rau kev siv dav dav ntawm kev sib tshuam aeration. Thaum Lub Ib Hlis Ntuj xyoo 2022, Ministry of Ecology thiab Ib puag ncig tau tshaj tawm kev sib tham txog kev hloov kho rau GB 18918-2002, feem ntau hais kom ntxiv cov kev txwv siab tshaj plaws rau kev ntsuas ib zaug. Cov kev txwv ib qho kev ntsuas no tau nce siab dua li qhov kev txwv nruab nrab txhua hnub, thaum qhov nruab nrab txhua hnub tseem tsis hloov pauv. Piv txwv li, rau Qib A, ib qho kev ntsuas qis dua 10 mg / L (15 mg / L qis dua 12 degree) yuav ua tau yog tias qhov nruab nrab txhua hnub tseem qis dua 5 mg / L (8 mg / L qis dua 12 degree). Yog tias siv tau, qhov kev hloov kho no tuaj yeem pab daws cov teeb meem kev cai lij choj hais txog kev tshaj tawm tam sim ntawd los ntawm kev sib tshuam aeration, ua kom yooj yim rau nws daim ntawv thov hauv cov txheej txheem oxidation ditch.
3.4 Precise Aeration Technology
WWTP tus nqi ntws thiab cov ntsiab lus muaj txiaj ntsig tau hloov pauv ntau, txawm tias nyob rau ib hnub, ua rau huab cua sib txawv. Kev cia siab ib leeg los ntawm kev paub txog kev siv phau ntawv-raws li kev hloov kho ua rau kev tswj hwm nyuaj thiab tuaj yeem cuam tshuam cov dej ntws zoo. Nrog rau kev nce qib hauv cov ntaub ntawv loj thiab kev txawj ntse, lub tswv yim ntawm kev ua kom lub cev muaj zog tau tshwm sim. Kev siv thev naus laus zis thev naus laus zis tau raug siv hauv qee qhov WWTPs, feem ntau ua tiav 10% -20% kev txuag hluav taws xob hauv cov tshuab aeration. Kev sib xyaw kom haum aeration nrog rau lwm cov txheej txheem hloov kho tuaj yeem ua tau zoo dua. Zhu Li et al. tau siv qhov tseeb aeration retrofitting hauv ntau-theem A/O txheej txheem WWTP, ua tiav 49.8% kev txuag hluav taws xob hauv lub tshuab aeration. Precise thiab ntse aeration sawv cev rau cov lus qhia tseem ceeb yav tom ntej rau kev txuag hluav taws xob thiab txo cov pa roj carbon. Cov kev txwv tam sim no muaj nyob rau hauv qhov tiag - lub sijhawm muaj peev xwm thiab qhov tseeb ntawm kev tau txais cov ntaub ntawv thiab kev tshuaj xyuas rau cov tshuab no. Xav paub ntau ntxiv txog kev siv technology hauv lub sijhawm tiag tiag - tswj lub tshuab blowers thiab li qub thiab cov pa xa tawm kom raug.
4. Cov lus xaus
Kev txuag hluav taws xob hauv cov tshuab aeration yog qhov tseem ceeb rau kev txo qis hauv WWTPs. Lub hauv paus yog vim li cas rau kev siv hluav taws xob siab hauv Suav WWTP aeration systems yog cov khoom siv hluav taws xob tsawg, uas yooj yim ua rau dhau - aeration, nkim hluav taws xob thiab nce carbon emissions los ntawm ob lub zog thiab tshuaj. Lwm cov laj thawj suav nrog kev laus / qis- cov cuab yeej ua haujlwm tau zoo thiab tsis tsim nyog teeb tsa ntawm aeration thiab cov khoom sib xyaw. Kev siv tau zoo txhais tau tias ua kom tau txais kev txuag hluav taws xob thiab txo cov pa roj carbon monoxide xws li hloov qis - ua haujlwm tau zoo nrog cov khoom siv aeration siab - ua haujlwm zoo, hloov qhov saum npoo kom zoo- npuas diffused aeration, thiab siv cov thev naus laus zis xws li txuas ntxiv -flow intermittent aeration thiab precise aeration.