Engineering tsim thiab kev ua tau zoo ntawm Pure Biofilm MBBR txheej txheem rau Advanced Nitrogen tshem tawm
Nrog rau kev nce qib ntawm Tuam Tshoj txoj kev tsim kho kev lag luam ecological, cov qauv tso tawm rau cov chaw kho dej khib nyiab (WWTPs) tau dhau los ua nruj. Qib A tus qauv ntawm "Txoj Cai Tswj Xyuas Cov Kabmob Rau Cov Kev Kho Dej Hauv Lub Nroog" (GB 18918-2002) xav kom TN Tsawg dua lossis sib npaug li 15 mg / L, thaum cov qauv hauv zos hauv cheeb tsam xws li Beijing thiab Shandong qhia meej txog qhov txwv ntawm TN Less dua lossis sib npaug rau 1. Cov qauv kev siab siab no txuas ntxiv dhau qhov kev txwv dej tsis zoo, tso cov kev xav tau nruj dua ntawm cov dej ntws tawm. Yog li ntawd, nws yog ib qho tsim nyog yuav tsum tau ua kom muaj peev xwm tshem tawm nitrogen tshem tawm ntawm cov txheej txheem kho. Ib txoj hauv kev yog txhawm rau nce cov pa roj carbon ntau npaum li cas hauv cov txheej txheem uas twb muaj lawm los txhim kho denitrification, tab sis qhov no ua rau cov nqi ua haujlwm siab thiab nce carbon emissions. Xwb, ntxiv cov chaw tshem tawm nitrogen siab heev, feem ntau siv cov txheej txheem biofilm kom muaj txiaj ntsig zoo ntawm cov kab mob denitrifying, tuaj yeem txhim kho TN tshem tawm, txo qhov xav tau ntawm cov pa roj carbon monoxide, thiab txo qis carbon emissions. Lub Moving Bed Biofilm Reactor (MBBR), nrog rau nws qhov zoo ntawm cov kab mob muaj zog ua kom muaj zog ntxiv, hneev taw me me, thiab kev ua haujlwm yooj yim thiab kev saib xyuas, tau siv dav hauv kev tsim kho, nthuav dav, thiab kho dua tshiab ntawm WWTPs. Nws tuaj yeem ua tiav cov qauv tso tawm zoo dua li quasi-Class IV nto dej zoo thiab tuav cov peev txheej tseem ceeb thiab qhov zoo rau kev tshem tawm nitrogen siab hauv WWTPs. Tsab ntawv xov xwm no yuav siv WWTP hauv Shandong raws li cov ntaub ntawv tshawb fawb los tshuaj xyuas qhov tsim qauv tsim thiab kev ua haujlwm ntawm kev siv cov txheej txheem biofilm MBBR ntshiab rau kev tshem tawm nitrogen siab heev, aiming muab cov ntaub ntawv siv rau cov dej khib nyiab zoo.
1. Qhov project Overview
1.1 Project Introduction
Lub WWTP hauv Shandong tau tsim nyob rau hauv ob theem. Thawj theem, siv cov txheej txheem BIOLAK, tau ua haujlwm rau lub Kaum Ib Hlis 2003 nrog kev kho mob ntawm 40,000 m³ / d. Cov txheej txheem ntawm BIOLAK txheej txheem thiab thaj chaw muaj rau kev txhim kho tau pom hauvDaim duab 1. Thaum xub thawj, cov dej ntws zoo tau raws li Qib B tus qauv ntawm GB 18918-2002. Thaum xyoo 2020, los ntawm kev siv cov pa roj carbon zoo dua thiab ntxiv cov kev kho mob siab heev, cov dej ntws zoo tau raug txhim kho rau qib A tus qauv. Los ntawm 2023, tom qab peb xyoos ntawm kev ua haujlwm, tag nrho cov dej ntws zoo tuaj yeem ua tau raws li Qib A tus qauv, tab sis nws tau ntsib ob qhov teeb meem loj txog kev tshem tawm nitrogen:
High Carbon Source Dosage: Yuav kom ua tiav lub hom phiaj ntawm TN Tsawg dua lossis sib npaug li 15 mg / L, yuav tsum muaj cov pa roj carbon ntau ntxiv. Kev xam raws li cov txheej txheem cov ntu tau pom qhov sib piv C / N siab li 5.9, thaum AAO txheej txheem hauv cov nroj tsuag theem ob yuav tsum tsuas yog C / N ntawm 4.5–5.0 kom ntseeg tau tias kev ua raws li TN ruaj khov. Cov pa roj carbon ntau ntxiv kuj tseem cuam tshuam rau cov txheej txheem aerobic nitrification, ua kom cov pa oxygen xav tau hauv thaj chaw aerobic.
Tsis muaj kev ruaj ntseg ntawm Nitrogen tshem tawm: Txij li thaum nitrification thiab denitrification tshwm sim nyob rau hauv tib lub tank raws li qhov sib txawv qhov yuav tsum tau ua, kev ua haujlwm tsis zoo yuav tsum tau hloov kho raws li kev hloov pauv muaj txiaj ntsig. Kev tswj hwm NH₃-N thiab TN yog qhov tsis sib xws, ua rau nws nyuaj rau kev tswj hwm qhov sib npaug ntawm nitrification thiab denitrification. Lub kaw lus poob siab load kuj yog qhov nruab nrab, ua rau tsis zoo effluent stability.
Yog li, kev hloov kho tshiab ntawm cov txheej txheem BIOLAK thawj zaug yog qhov tsim nyog, nrog rau lub hom phiaj tseem ceeb ntawm kev daws qhov tsis sib haum xeeb ntawm nitrification thiab denitrification, txo qis nitrogen tshem tawm cov nqi ua haujlwm, thiab txhim kho kev ruaj ntseg effluent.
1.2 Txhim kho cov kev sib tw
Raws li cov txheej txheem BIOLAK tsis tsim nyog rau hauv - hloov pauv lub tank los txhim kho kev ua tau zoo, lub hom phiaj yog los txhawb kev kho mob los ntawm kev tsim cov chav tshem tawm nitrogen siab tshiab. Thawj txheej txheem BIOLAK tsom feem ntau ntawm nitrification nrog denitrification ua theem nrab, thaum cov txheej txheem tshiab yuav tsom mus rau denitrification. Muab qhov xav tau kev kho dua tshiab, qhov project tau ntsib ob qhov teeb meem loj: txwv tsis pub muaj av rau cov txheej txheem tshiab thiab kev ua haujlwm siab ua haujlwm.
Tsuas Muaj Av rau Cov Txheej Txheem Tshiab: Kev tsim kho tshiab yuav tsum ua kom tiav nyob rau hauv qhov chaw cog qoob loo uas twb muaj lawm, uas tsis muaj av tshwj xeeb. Kev tsim kho tsuas yog ua tau ntawm ib txoj hlua khi uas nyob ib sab ntawm BIOLAK tso tsheb hlau luam, nrog thaj tsam ntawm 400 m². Qhov no txhais tau tias qhov project tshiab tus hneev taw rau ib chav dej kho yuav tsum tsawg dua lossis sib npaug li 0.01 m² / (m³·d).
Cov kev xav tau ntawm kev ua haujlwm siab: Qhov no tsis yog qhov hloov kho yooj yim tab sis kev ua kom zoo ntxiv ntawm thaj chaw biochemical ua haujlwm. Chav tsev tshiab tau xav tias yuav tswj tau cov khoom tshem tawm nitrogen ntawm 20 mg / L. Cov txheej txheem no tsis tsuas yog yuav tsum tau ua kom tiav ntawm thaj av txwv tab sis tseem yuav tsum tau txo qis cov pa roj carbon ntau npaum li cas piv rau thawj BIOLAK denitrification thaum ua kom ruaj khov denitrification kev ua tau zoo. Yog li, kev xav tau siab tau muab tso rau ntawm ob qho tib si nitrogen tshem tawm efficiency thiab carbon qhov chaw siv efficiency.
2. Txheej txheem sib piv thiab xaiv
Tom qab kev kho mob los ntawm cov txheej txheem BIOLAK, TN effluent feem ntau yog nitrate nitrogen. Tam sim no, paub tab cov txheej txheem tshem tawm nitrogen siab tshaj plaws feem ntau siv cov txheej txheem biofilm, uas muaj cov kab mob ua kom muaj txiaj ntsig zoo ntawm cov kab mob hauv lub xeev txuas, muab cov kab mob ua kom muaj txiaj ntsig zoo dua li cov txheej txheem activated sludge. Cov txheej txheem Biofilm tuaj yeem muab faib ntxiv rau hauv qhov ruaj khov - txaj thiab txav chaw - hom txaj raws li tus neeg nqa khoom fluidization, raws li qhia hauvDaim duab 2.Denitrifying filters, ib txwm tsau -txoj kev biofilm txaj, siv cov khoom siv lim dej ruaj khov raws li cov cab loj hlob microbial. Los ntawm kev ntxiv cov pa roj carbon monoxide sab nraud, lawv leverage lub denitrification ntawm biofilm thiab kev pom ntawm cov xov xwm kom ua tiav ib txhij tshem tawm NO₃--N, SS, thiab lwm yam kuab paug. Cov txiaj ntsig muaj xws li kev kho dej ruaj khov, tsis tas yuav muaj cov lus qhia ntxiv, thiab cov txheej txheem sib cog lus, ua rau lawv tau siv dav hauv WWTP kev hloov kho tshiab raws li chav kho mob siab heev los txhawb nqa TN tshem tawm ntawm cov dej ntws thib ob. Txawm li cas los xij, kev ua haujlwm ua kom pom tseeb yuav tsum yog ntawm qhov cuam tshuam ntawm C / N ntawm kev ua haujlwm siab tshaj denitrification. Lub Pingtang WWTP Phase I upgrade project, kuj muaj peev xwm ntawm 40,000 m³ / d, siv lub denitrifying lim + siab -efficiency dissolved air flotation (DAF) raws li cov txheej txheem kev kho siab heev los tsa TN effluent mus rau quasi-Class IV nto dej qauv, ua tiav ib hneev taw ntawm 0.5m³ / 0. Kev kho mob zoo, tab sis nrog C / N siab txog 18.34. Txhawm rau ua kom tau raws li cov qauv tshiab hauv zos rau cov dej ntws tawm TN, Chengdu No. 9 Dej Reclamation Plant tau txais kev siab siab -cov dej ntws tawm thiab denitrifying sib sib zog nqus{13}} txaj lim raws li cov txheej txheem kev txhim kho, nrog C / N ntawm 5.7, ua tiav kev kho mob raws li cov qauv siab. Lub Dingqiao WWTP hauv Haining tsis tuaj yeem ua tau raws li Qib A cov qauv kev tso tawm uas xav tau rau Qiantang River Basin. Gao Feiya et al. siv lub denitrifying sib sib zog nqus- txaj lim rau kev kho TN siab, ib txhij tshem tawm SS thiab TP, nqa cov dej ntws zoo ze rau quasi-Class IV cov qauv, tab sis nrog C / N siab ntawm 15.68, ua rau cov nqi tshem tawm nitrogen siab. Tsis tas li ntawd, cov txheej txheem lim dej yuav tsum tau ua kom rov qab ua haujlwm tsis tu ncua, feem ntau yog siv huab cua - dej scouring, uas tuaj yeem cuam tshuam kev ua haujlwm ruaj khov.
instability nyob rau hauv denitrifying lim, kev tshawb fawb ntawm kev siv sulfur -raws li autotrophic denitrification (SAD) rau denitrifying lim tau txais kev saib xyuas. SAD siv cov tshuaj sulfur los yog sulfur compounds raws li cov khoom siv hluav taws xob nyob rau hauv anaerobic lossis anoxic mob los txo NO₃--N rau N₂. Nws muaj cov txiaj ntsig zoo xws li kev ua haujlwm zoo denitrification, tsis tas yuav muaj cov pa roj carbon monoxide, cov nqi ua haujlwm qis, thiab cov sludge tsawg. Song Qingyuan et al. tau kawm txog cov txiaj ntsig ntawm kev tshem tawm nitrogen ntawm SAD lim ntawm cov dej ntws thib ob. Tom qab ua kom zoo rau kev tsav tsheb, kev tshem tawm nitrate tseem nyob ruaj khov siab dua 95%, tab sis kev siv xov xwm tau nce mus txog 20% txhua xyoo, nrog rau kev nce ntxiv ntawm sulfate concentration thiab txo pH. Txhawm rau kom tsis txhob muaj kev phom sij txaus ntshai los ntawm SAD, Li Tianxin et al. npaj tawm los ntawm pelletizing ib tug sib tov ntawm sulfur thiab limestone hmoov. Ntxiv ib qho kev faib ua feem ntawm limestone rau lub txaj lim neutralized lub generated acidity thiab ua CaSO₄ precipitate, txo cov dej sulfate concentration thiab zoo daws teeb meem ntawm acid ntau lawm thiab siab sulfate ntau ntau. Txawm li cas los xij, lub limestone nyob hauv qhov chaw txhais tau tias rau cov khoom siv hluav taws xob hluav taws xob hauv lub cev, ua kom tsis muaj zog denitrification muaj peev xwm, ua kom cov dej tsis zoo, thiab nce nqi ua haujlwm. Kev tshawb fawb tam sim no ntawm SAD thev naus laus zis feem ntau yog nyob rau hauv chav kuaj thiab ntsuas ntsuas, nrog rau kev siv tshuab tsis txaus rau kev siv. Kev tshawb fawb ntxiv yog xav tau ua ntej kev lag luam- nplai nce qib.
MBBR yog ib tug neeg sawv cev ntawm fluidized -txoj kev biofilm txaj thiab cov cuab yeej tshiab kho dej khib nyiab uas tau txais kev saib xyuas zoo nyob rau xyoo tas los no. It uses suspended carriers with a density close to water to specifically enrich microorganisms, forming a biofilm to achieve advanced nitrogen removal. Fluidized- cov txheej txheem biofilm txaj kuj zam cov teeb meem ntawm kev tawm xov xwm clogging thiab rov qab ntxuav. Tam sim no, ntshiab biofilm MBBR rau qib siab WWTP denitrification muaj ntau tshaj 20 xyoo ntawm kev ua haujlwm tau zoo nyob txawv teb chaws thiab tau pom ntau daim ntawv thov hauv Suav teb. Zheng Zhijia et al. siv ob -theem ntshiab biofilm MBBR txheej txheem rau kev ua kom zoo tshaj plaws. Ntawm C / N =4.0, lub kaw lus effluent nitrate nitrogen stabilized ntawm (1.87 ± 1.07) mg / L, nrog qhov nruab nrab TN tshem tawm tus nqi ntawm 93.3%. Ib cheeb tsam kev loj hlob WWTP hauv ib lub nroog tau tsim kho MBBR bio- tank tshiab raws li kev kho mob qib siab rau kev txhim kho denitrification. Lub TN tshem tawm load nyob rau hauv anoxic seem ntawm cov ntshiab biofilm MBBR yog 1.1 g / (m²·d), txhim kho qhov system denitrification kev ntseeg tau. Gao Yanbo li al., aiming mus nce tus thawj cog lub peev xwm, tsim ib tug tshiab ob-theem AO ntshiab biofilm MBBR bio-tank, ua kom tiav effluent TN qis dua 5 mg/L nrog high denitrification efficiency. Yog li, cov txheej txheem ntshiab biofilm MBBR qhia tau hais tias muaj peev xwm zoo tshaj plaws rau kev tshem tawm nitrogen siab hauv WWTPs, sib txuas cov txiaj ntsig zoo li kev siv cov pa roj carbon ntau, kev kho mob siab, thiab hneev taw me me. Txawm li cas los xij, nws tseem tso cov kev xav tau ntau dua ntawm cov cuab yeej siv, xav tau cov cuab yeej txhim khu kev qha los txhawb kev ua haujlwm ruaj khov. Ib qho kev sib piv ntawm cov txheej txheem kev tshem tawm nitrogen ntau tshaj yog qhia hauvTable 1.
Raws li kev sib piv, txawm hais tias tus txheej txheem SAD yuav tsum tsis muaj cov pa roj carbon ntxiv, nws daim ntawv thov tam sim no tseem tsis tau paub tab thiab muaj kev pheej hmoo ntawm kev ua qias tuaj, yog li nws tsis tau txiav txim siab rau qhov kev txhim kho no. Txawm hais tias cov lim dej denitrifying tau siv dav, lawv feem ntau ua haujlwm hauv WWTP kev hloov kho tshiab qhov twg tus qauv tsim muaj txiaj ntsig / cov dej tawm TN feem ntau yog 15/12 mg / L, tuav ib qho me me TN tshem tawm. Txij li qhov project no xav tau kev sib ntsib ntev -lub sij hawm, siab TN tshem tawm xav tau, kev ua haujlwm yuav ua rau lub lim dej rov qab ua haujlwm, ua rau muaj kev ua haujlwm nyuaj thiab tsis ruaj khov. Cov txheej txheem ntshiab biofilm MBBR muab cov txiaj ntsig zoo xws li kev siv cov pa roj carbon ntau, tsis xav tau rov qab ntxuav, daim ntawv thov paub tab, thiab tsis muaj kuab paug thib ob. Xav txog cov txheej txheem kev cov nyom thiab kev kho dua tshiab, qhov project thaum kawg tau xaiv qhov kev tsim kho tshiab ntawm biofilm MBBR bio- tank (tom qab no hu ua MBBR tank) ua cov tshuaj nitrogen siab tshaj tawm rau thawj theem, tsim nrog C / N=4.5, thiab npaj peev nyiaj rov qab lub sijhawm ntawm 7.37 xyoo.
3. Kev Tsim Kho Tshiab
3.1 Txheej txheem Flow
Cov txheej txheem kho dej khib nyiab ntws tom qab kho dua tshiab tau qhia hauvDaim duab 3. Cov nroj tsuag muaj kev cuam tshuam dhau los ntawm cov ntxaij vab tshaus zoo, vortex grit chambers, thiab thawj cov dej khib nyiab ua ntej nkag mus rau BIOLAK bio- tank rau kev tshem tawm cov organic teeb meem, ammonia nitrogen, thiab lwm yam. Nws yog tom qab ntawd nqa los ntawm cov twj tso rau hauv MBBR tank rau kev tshem tawm TN siab heev. MBBR tank yog tsim los rau ib qho kev muaj zog TN ntawm 35 mg / L thiab TN effluent tsawg dua lossis sib npaug li 15 mg / L. MBBR effluent yog nqa los ntawm cov twj tso kua mis thib ob rau cov nroj tsuag uas twb muaj lawm kev kho mob siab heev rau cov khoom-kua sib cais thiab sludge nkim. Qhov kawg effluent yog disinfected ua ntej tawm mus rau tus dej txais. Cov sludge ntau dhau yog thickened, dewatered, thiab thauj tawm ntawm - qhov chaw pov tseg.
3.2 Tshiab MBBR Tank
MBBR tank ntiav cov txheej txheem AO, tsim siv Lipp tso tsheb hlau luam rau kev sib dhos ua ke, ua tiav hauv 30 hnub. Tag nrho qhov system hydraulic retention time (HRT) yog 1.43 teev. SPR-III hom tshwj xeeb aerobic thiab anoxic tshem tawm cov cab kuj tau ntxiv rau hauv cov tso tsheb hlau luam, nrog rau 60% sau piv rau hauv thaj chaw aerobic thiab 55% hauv thaj chaw anoxic. Cov neeg nqa khoom yog oblate cylindrical, 25 mm inch thiab 10 mm nyob rau hauv qhov siab, nrog rau ib tug zoo meej cheeb tsam ntawm ntau tshaj los yog sib npaug zos rau 800 m² / m³. Lub cheeb tsam anoxic yog nruab nrog 4 MBBR-mob sib txawv- zaus sib tov (SPR tshuaj fais fab), N=5.5 kW txhua, muab cov dej sib xws thiab txaus rau cov neeg nqa khoom. Tom qab biofilm maturation, 2 mixers yog ib txwm ua, nrog rau lwm 2 li kub standby. Lub aerobic cheeb tsam siv cov ntsia hlau blowers rau aeration. Ib lub tshuab cua muaj peev xwm ntawm 14.50 m³ / min, siab 90 kPa, N=22 kW. Ib txheej ntawm aerobic cheeb tsam nplooj siab perforated yeeb nkab diffusers (SPR hom) yog ntsia. Vim tias qhov xav tau qis qis qis, lub tshuab raj Phaj I uas twb muaj lawm tuaj yeem siv tau, nrog rau lub tshuab tshuab tshiab thiab Phase I blowers ua kev sib koom ua ke. Cov khoom siv tshiab cuam tshuam cov ntxaij vab tshaus (SPR hom), 12 hli tuab, nrog rau kev tsim kev pab cuam lub neej ntawm 30 xyoo, tau nruab rau hauv ob qho tib si aerobic thiab anoxic aav.
3.3 Cov Chaw Pabcuam Tshiab
- Influent System: Cov dej ntws tawm los ntawm BIOLAK bio- lub tank tau nqa mus rau hauv MBBR tank . 4 cov twj tso kua dej nkag (2 lub luag haujlwm, 2 standby), txhua tus nrog Q=840 m³ / h, H=65 kPa, N=30 kW.
- Carbon Source Dosing System: Cov dej ntws los ntawm Theem I BIOLAK bio- tank tsuas muaj COD uas nyuaj rau kev siv. Txhawm rau kom paub meej txog kev denitrification hauv thaj tsam anoxic ntawm MBBR tank, sodium acetate yog siv los ua cov pa roj carbon monoxide sab nraud . 4 metering twj raug teeb tsa (2 lub luag haujlwm, 2 standby), txhua tus nrog Q=300 L / h, H=200 kPa, N=0.37 kW.
4. Kev ua haujlwm zoo
Tom qab ua tiav, tag nrho cov hneev taw ntawm qhov chaw tshiab yog 296 m², ua tiav cov hneev taw rau ib chav dej kho ntawm 0.0074 m² / (m³·d), daws cov teeb meem zoo li lub sijhawm siv luv luv thiab qhov chaw txwv. Peb tes num tau raug tso cai ua haujlwm rau lub Cuaj Hlis 2023. Kev ua haujlwm tau zoo tau soj ntsuam tas li mus txog Lub Ib Hlis 2024, nrog cov ntaub ntawv nruab nrab txhua hnub siv rau kev tshuaj xyuas. Kev kho mob ntws yog (38,758.14 ± 783.16) m³ / d, ncav cuag 96.9% ntawm cov qauv tsim. Kev ua haujlwm, BIOLAK bio- tank tsis tas yuav tsum sib npaug ntawm cov kab ke nitrification thiab denitrification, tsom mus rau kev ntxiv dag zog rau kev tshem tawm ammonia, ua rau cov kua dej ammonia tsuas yog (0.77 ± 0.15) mg / L. Tib lub sijhawm, BIOLAK bio- tank ua tiav "zero dosing" ntawm cov pa roj carbon. MBBR tank influent TN mus txog (27.98 ± 2.23) mg / L, nrog TN effluent xwb (10.11 ± 1.67) mg / L, stably zoo dua li tus qauv tso tawm. MBBR tank TN tshem tawm tus nqi yog 63.87%, suav txog 75.37% ntawm tag nrho TN tshem tawm los ntawm cov txheej txheem biochemical. Kev ntsuas ntawm tus nqi denitrification los ntawm cov neeg nqa khoom tau pom tias nyob rau hauv qhov kev pom zoo, tus nqi nce mus txog 1.8 npaug ntawm tus nqi tsim, txhim kho qhov system denitrification efficiency. MBBR tank tseem siv cov tshuaj denitrification. Qhov ntsuas C/N tsuas yog 3.71, qis dua qhov ua ntej- hloov kho tus nqi (C/N=5.9), txo qis ntawm 37.12%. Muab piv rau cov lim dej denitrifying (feem ntau C / N> 5.0), qhov project no tuaj yeem txuag tau 30% -40% hauv cov pa roj carbon ntau npaum li cas, ua tiav lub zog thiab txuag nqi. Tom qab- hloov kho dua tshiab, qhov txo qis hauv cov pa roj carbon monoxide sab nraud kuj ua rau txo qis cov sludge.
Tag nrho cov peev txheej yog 8 lab CNY, nrog rau lub sijhawm them rov qab tsuas yog 3.02 xyoo, 59.02% luv dua li lub sijhawm tsim, ua kom pom tseeb qis - carbon transformation thiab lub zog / nqi txuag rau WWTP. Qhov tseem ceeb, nyob rau hauv cov xwm txheej ntawm kev muaj zog nitrate thiab qis C / N, nitrite nitrogen concentration hauv MBBR anoxic zone effluent mus txog 4.34 mg / L. Nitrite yog ib qho tseem ceeb substrate rau cov txheej txheem anammox thiab ib qho tseem ceeb txwv tsis pub siv rau hauv daim ntawv thov anmmox. Qhov project no tau ua tiav nitrite tsub zuj zuj siv cov txheej txheem biofilm, muab lub hauv paus mob rau yav tom ntej mainstream anmmox txheej txheem debugging.
5. Cov lus xaus
WWTP hauv Shandong tau hloov kho nws cov txheej txheem BIOLAK thawj zaug los ntawm kev tsim lub chaw tshiab biofilm MBBR, ib txhij ntsib kev xav tau rau lub zog / nqi txuag thiab kev tshem tawm nitrogen siab heev. Qhov chaw tshiab tau tsim rau ntawm thaj av marginal, ua tiav qhov hneev taw ntawm 0.0074 m² / (m³·d). Tom qab kev siv, MBBR tank suav txog 75.37% ntawm tag nrho TN tshem tawm los ntawm cov txheej txheem biochemical, nrog rau C / N tsuas yog 3.71. Tus thawj BIOLAK tank ua tiav "zero" carbon qhov chaw noj, txo cov nqi carbon los ntawm 37.29% piv rau ua ntej kev txhim kho. Lub sijhawm peev nyiaj rov qab tsuas yog 3.02 xyoo, 59.02% luv dua tus nqi tsim. Los ntawm kev tsim ib tug ntshiab biofilm MBBR txheej txheem rau siab heev denitrification, qhov kev tsis sib haum xeeb ntawm nitrification thiab denitrification muaj nyob rau hauv cov txheej txheem BIOLAK tau daws, txhim kho qhov system poob siab load kuj thiab zoo heev txhim kho effluent stability. Qhov no muab cov kev daws teeb meem tshiab rau WWTP qhov zoo, txhim kho kev ua tau zoo, thiab txuag hluav taws xob / nqi.