Sau! Aeration Tank Kev khiav hauj lwm thiab kev saib xyuas(Part 4)
Sau los ntawm: Jasmine
Contact email: Jasmine@juntaiplastic.com
1. Tsib yam tseem ceeb ntawm kev niaj hnub saib xyuas ntawm aeration tank dej kom tsawg
1.1 Kub
1.2 PH nqi
1.3 COD thiab BOD5
1.4 Ammonia nitrogen thiab phosphate
1.5 Cov tshuaj lom
2. niaj hnub saib xyuas qhov project ntawm cov kua sib xyaw hauv aeration tank
2.1 Yuav ua li cas tswj MLSS lossis MLVSS tus nqi ntawm lub tank aeration?
2.2 Dab tsi yog qhov sludge settling ratio (SV) ntawm aeration tank sib tov? Lub luag haujlwm yog dab tsi?
2.3 Dab tsi txawv txav tshwm sim tshwm sim thaum ntsuas tus nqi SV? Vim li cas?
2.4 Sludge Volume Index (SVI) yog dab tsi?
2.5 Dab tsi yog vim li cas rau qhov nce ntawm SVI tus nqi ntawm cov aeration tank sib tov?
3. Kev tswj hwm ntawm aeration tank - ua npuas ncauj teeb meem
3.1 Brown-daj ua npuas ncauj
3.2 grey-dub ua npuas ncauj
3.3 Dawb ua npuas ncauj
3.4 Xim ua npuas ncauj
4. Kev tswj hwm ntawm aeration tank - sludge expansion
4.1 Cov xwm txheej ib puag ncig uas ua rau kev nthuav dav ntawm cov kab mob filamentous nyob rau hauv activated sludge yog:
4.2 Cov xwm txheej thiab ua rau muaj kev nthuav dav ntawm cov kab mob uas tsis yog-filamentous
4.3 Kev ntsuas los tswj cov sludge bulking hauv aeration tank
Sau los ntawm: Jasmine
Contact email: Jasmine@juntaiplastic.com
4. Kev tswj hwm ntawm aeration tank - sludge expansion
4.1 Cov xwm txheej ib puag ncig uas ua rau kev nthuav dav ntawm cov kab mob filamentous nyob rau hauv activated sludge yog:
4.1.1 Cov organic teeb meem tsawg dhau ntawm cov dej muaj txiaj ntsig thiab qis F / M hauv lub tank aeration, ua rau cov khoom noj microbial tsis txaus.
4.1.2 Cov nitrogen, phosphorus thiab lwm yam as-ham nyob rau hauv lub influent dej yog tsis txaus.
4.1.3 PH tsawg dhau, uas tsis tsim nyog rau kev loj hlob ntawm cov kab mob.
4.1.4 Cov pa oxygen yaj hauv cov kua sib xyaw ntawm lub aeration tank tsawg dhau los ua kom tau raws li qhov xav tau ntawm cov kab mob.
4.1.5 Cov dej tsis zoo los yog qhov ntau ntawm cov dej tuaj yeem hloov pauv ntau dhau, uas yuav cuam tshuam rau cov kab mob.
4.1.6 Thaum cov dej phwj nkag mus rau hauv lub aeration tank tsim ntau H2S (dhau 1-2} mg/l) vim "kev ua tsis ncaj", nws tseem yuav ua rau cov kab mob filamentous sulfur ntau ntxiv, uas yuav nthuav cov sludge. ntawm cov kab mob filamentous sulfur.
4.1.7 Qhov ntsuas kub kom haum rau cov kab mob filamentous kom ntau yog 25 degree -30 degree, yog li cov kab mob filamentous sludge bulking yog ib qho yooj yim tshwm sim rau lub caij ntuj sov.
Sau los ntawm: Jasmine
Contact email: Jasmine@juntaiplastic.com
4.2 Cov xwm txheej thiab ua rau muaj kev nthuav dav ntawm cov kab mob uas tsis yog-filamentous
Kev nthuav dav ntawm cov kab mob uas tsis yog-filamentous yog vim qhov txawv txav ntawm lub cev kev ua haujlwm ntawm cov kab mob hauv cov kab mob micelles, uas ua rau muaj kev cuam tshuam ntawm kev ua haujlwm ntawm cov activated sludge.
Muaj ob hom.
Ib qho yog tias cov dej muaj txiaj ntsig muaj ntau cov organic yaj, uas ua rau cov sludge load F / M siab dhau, thaum cov dej muaj zog tsis txaus nitrogen, phosphorus thiab lwm cov as-ham, lossis cov pa oxygen hauv cov kua sib xyaw tsis txaus. Thaum F / M siab, cov kab mob yuav nqus tau cov organic ntau ntau rau hauv lub cev, thiab vim tsis muaj nitrogen, phosphorus lossis tsis txaus cov pa oxygen, cov catabolism tsis tuaj yeem nqa tawm hauv lub cev.
Lub sijhawm no, cov kab mob yuav tso cov polysaccharides ntau dhau rau hauv lub cev. Cov tshuaj no muaj zog hydrophilicity vim muaj ntau pawg hydroxyl hauv cov mis molecular. Cov dej ua ke ntawm cov sludge activated yog siab li 400 feem pua (ib txwm sludge ua ke dej yog li 100 feem pua).
Nws yog nkig thiab gelatinous, yog li cov activated sludge tsis tuaj yeem sib cais zoo thiab muaj zog nyob rau hauv lub tank thib ob sedimentation. Qhov sludge bulking no hu ua viscous bulking.
Lwm cov kab mob uas tsis yog-filamentous o yog vim muaj ntau cov tshuaj lom neeg muaj nyob rau hauv cov dej muaj zog, ua rau muaj sludge lom. Cov kab mob tsis tuaj yeem zais cov khoom viscous txaus los tsim cov flocs, yog li nws tsis tuaj yeem sib cais thiab mloog zoo rau cov av nkos thiab dej hauv lub tank thib ob. Cov sludge bulking no qee zaum hu ua non-viscous bulking lossis discrete bulking.
Sau los ntawm: Jasmine
Contact email: Jasmine@juntaiplastic.com
4.3 Kev ntsuas los tswj cov sludge bulking hauv aeration tank
Cov kev ntsuas los tswj cov sludge bulking nyob rau hauv aeration tanks yuav roughly muab faib ua peb pawg. Ib qeb yog kev tswj xyuas ib ntus, qeb thib ob yog cov txheej txheem kev tswj xyuas kev ua haujlwm, thiab qeb thib peb yog kev tswj xyuas mus tas li.
4.3.1 Kev tswj ib ntus los tswj cov sludge bulking hauv aeration tanks
Kev tswj xyuas ib ntus feem ntau yog siv los tswj cov sludge bulking vim yog vim li cas ib ntus thiab tiv thaiv sludge poob, ua rau SS ntau dhau ntawm cov dej ntws los yog ntau qhov sludge poob.
Kev tswj xyuas ib ntus suav nrog flocculant-pab sedimentation thiab fungicide sterilization. Txoj kev flocculant-pab sedimentation feem ntau yog siv rau sludge bulking tshwm sim los ntawm cov kab mob uas tsis yog-filamentous, thaum txoj kev ua kom tsis muaj menyuam yog tsim rau sludge bulking los ntawm cov kab mob filamentous.
A) Txoj kev flocculant-pab sedimentation yog hais txog kev ntxiv flocculant rau lub aeration tank qhov twg sludge expansion tshwm sim los txhim kho cov coagulation kev ua tau zoo ntawm cov activated sludge thiab ua kom nws yooj yim mus cuag sludge-dej sib cais nyob rau hauv lub thib ob sedimentation tank.
Cov flocculants hauv kev kho coagulation feem ntau tuaj yeem siv rau lub sijhawm no. Feem ntau siv flocculants suav nrog inorganic flocculants xws li polyaluminum chloride thiab polyferric chloride, thiab organic polymer flocculants xws li polyacrylamide. Cov flocculant tuaj yeem ntxiv rau ntawm qhov nkag ntawm lub tank aeration lossis ntawm qhov hluav taws xob ntawm lub tank aeration, tab sis qhov ntau npaum li cas yuav tsum tsis txhob ntau dhau, txwv tsis pub nws tuaj yeem rhuav tshem cov kab mob lom thiab txo cov kev kho mob. Thaum siv flocculant, qhov ntau npaum ntawm tus neeg sawv cev sib xyaw nrog txhuas oxide tuaj yeem yog li 10mg / l.
B) Txoj kev ua kom tsis muaj menyuam yog hais txog kev ntxiv cov tshuaj rau hauv lub tank aeration uas nthuav dav tshwm sim los tua lossis inhibit qhov kev loj hlob ntawm cov kab mob filamentous. Yog li kom ua tiav lub hom phiaj ntawm kev tswj cov bulking ntawm cov kab mob filamentous sludge.
Feem ntau siv fungicides xws li kua chlorine, chlorine dioxide, sodium hypochlorite, bleaching hmoov, hydrogen peroxide, thiab lwm yam. Nyob rau hauv cov txheej txheem chlorination tiag tiag, nws yuav tsum tau maj mam nqa tawm los ntawm cov koob tshuaj me me mus rau koob tshuaj loj, thiab cov theem lom yuav tsum tau soj ntsuam thiab ntsuas tus nqi SVI txhua lub sijhawm. Feem ntau, cov tshuaj chlorination yog {{0}}.3 feem pua rau 0.6 feem pua ntawm cov khoom hnyav qhuav ntawm cov sludge. Thaum tus nqi SVI tau pom tias qis dua qhov siab tshaj plaws Dissolving ntawm filamentous fungus hyphae yog pom nyob rau hauv tus nqi tso cai los yog kuaj microscopic, thiab cov koob tshuaj yuav tsum tau nres tam sim ntawd. Ntxiv hydrogen peroxide (H2O2) muaj qhov cuam tshuam tsis tu ncua ntawm cov kab mob filamentous, qis dhau yuav tsis ua haujlwm, thiab siab dhau yuav ua rau sludge oxidation thiab tawg.
Sau los ntawm: Jasmine
Contact email: Jasmine@juntaiplastic.com
4.3.2 Kho cov txheej txheem ua haujlwm ntsuas los tswj cov sludge bulking
Kho cov txheej txheem kev tswj xyuas kev ua haujlwm tau zoo heev rau sludge bulking los ntawm kev tswj tsis raug ntawm cov txheej txheem. Cov txheej txheem tshwj xeeb yog:
A) Ntxiv av nplaum, slaked txiv qaub, nyoos sludge los yog digested sludge nyob rau hauv lub inlet ntawm lub aeration tank los txhim kho kev daws teeb meem thiab compactness ntawm lub activated sludge.
B) Ua kom cov dej phwj nkag mus rau hauv lub tank aeration hauv lub xeev tshiab, xws li kev ntsuas ua ntej aeration, kom cov dej phwj tuaj rau hauv lub xeev aerobic kom sai li sai tau kom tsis txhob tsim lub xeev anaerobic, thiab tib lub sijhawm tshuab tawm cov pa phem xws li hydrogen sulfide.
C) Ua kom muaj zog aeration siv, ua kom cov pa oxygen concentration ntawm cov tshuaj tov, thiab tiv thaiv lub zos hypoxia los yog anaerobicity ntawm cov tshuaj tov.
D) Ntxiv nitrogen, phosphorus thiab lwm cov as-ham kom muaj kev sib npaug ntawm cov pa roj carbon, nitrogen, phosphorus thiab lwm cov as-ham hauv kev sib xyaw. Ntawm qhov chaw uas tsis txo cov dej phwj tuaj kho, F/M yuav tsum tau nce kom tsim nyog.
E) Ua kom cov sludge rov qab piv, txo lub sij hawm nyob ntawm sludge nyob rau hauv lub thib ob sedimentation tank, thiab zam anaerobic lub xeev nyob rau hauv lub thib ob sedimentation tank.
F) Thaum tus nqi pH qis, nws yuav tsum tau hloov kho los ntawm kev ntxiv cov tshuaj alkaline kom nce pH tus nqi ntawm cov dej nkag ntawm lub tank aeration.
G) Txhim kho thiab txhim kho lub sijhawm ntawm kev soj ntsuam hauv chav kuaj los ntawm kev siv cov cuab yeej online, muab kev ua si tag nrho rau lub luag haujlwm ntawm pretreatment system, thiab xyuas kom meej tias cov sludge load nyob rau hauv lub aeration tank yog ruaj khov.
Sau los ntawm: Jasmine
Contact email: Jasmine@juntaiplastic.com
4.3.3 Kev tswj xyuas tas mus li los tswj cov sludge bulking
Kev tswj xyuas tas mus li hais txog kev saib xyuas tag nrho ntawm kev kho dua tshiab lossis tsim kev nthuav dav lossis kev tsim kho tshiab ntawm cov chaw uas twb muaj lawm. Yog li ntawd sludge bulking tsis tshwm sim, los yog muaj cov chaw tiv thaiv thaum sludge bulking tshwm sim. Ib qho kev ntsuas mus tas li yog txhawm rau nruab ib qho kev xaiv lom neeg nyob rau pem hauv ntej ntawm lub aeration tank.
Kev xaiv cultivation ntawm cov kab mob los ntawm cov selector txhais tau hais tias tsuas yog kev loj hlob thiab kev loj hlob ntawm cov kab mob nyob rau hauv lub micellar pab pawg neeg yog siv nyob rau hauv lub system, uas yog tsis conducive rau loj hlob thiab loj hlob ntawm filamentous fungi. Yog li kom tsis txhob muaj qhov tshwm sim ntawm cov kab mob filamentous sludge bulking nyob rau hauv kev kho mob lom. Muaj peb lub selectors, aerobic selector, anaerobic selector, anoxic selector.
A) Lub tshuab ntawm aerobic selector yog muab qhov chaw siab tshaj plaws uas muaj cov pa oxygen txaus thiab cov zaub mov txaus, kom cov kab mob micelles tuaj yeem ua cov hmoov txhuas hauv preempting cov organic teeb meem, thiab tsis txhob muab cov kab mob filamentous kom loj hlob. ntau dhau.
Piv txwv li, tus selector nyob rau hauv cov txheej txheem activated sludge yog nqa tawm regenerative aeration ua ntej lub rov qab sludge nkag mus rau hauv lub aeration tank los txo cov ntsiab lus ntawm cohesive tshuaj nyob rau hauv lub rov qab sludge, thiaj li hais tias cov microorganisms nkag mus rau hauv endogenous respiration seem thiab nce cov kab mob. kua nplaum. Lub peev xwm ntawm cov kab mob agglomerated nqus cov organic teeb meem thiab muaj peev xwm sib tw nrog cov kab mob filamentous, kom ob qho tib si filamentous thiab non-filamentous expansion yuav inhibited. Txhawm rau txhim kho cov txiaj ntsig ntawm microbial selector, muaj peev xwm txaus ntawm nitrogen, phosphorus thiab lwm yam khoom noj tuaj yeem ntxiv thaum lub sijhawm rov ua kom rov ua kom zoo dua qub los txhim kho cov haujlwm ntawm cov sludge.
B) Lub hauv paus ntsiab lus uas tus neeg xaiv anoxic tswj cov sludge bulking yog: feem ntau ntawm cov kab mob micellar cov kab mob tuaj yeem siv cov pa sib xyaw ua ke hauv cov nitrate hauv cov khoom siv los ua cov pa oxygen los nqa tawm cov kab mob lom, thaum cov kab mob filamentous (Chlamydia) tsis ua. muaj qhov no Yog li ntawd, nws yog inhibited nyob rau hauv lub selector, thiab cov proliferation lags qab cov kab mob micelle hom, uas zoo heev txo tau cov kab mob filamentous o.
C) Lub hauv paus ntsiab lus ntawm anaerobic selector los tswj cov sludge bulking yog tias feem ntau ntawm cov kab mob filamentous (Chlamydia) yog aerobic thiab yuav inhibited nyob rau hauv anaerobic tej yam kev mob. Txawm li cas los xij, feem ntau ntawm cov kab mob hauv cov kab mob micelles yog cov kab mob facultative, uas tau txais cov metabolism hauv anaerobic hauv lub sijhawm luv luv nyob rau hauv cov xwm txheej anaerobic thiab txuas ntxiv mus. Txawm li cas los xij, qhov teeb tsa ntawm tus neeg xaiv anaerobic yuav ua rau muaj qhov tshwm sim ntawm qhov o ntawm cov kab mob filamentous hauv cov kab mob filamentous, vim tias cov metabolism hauv anaerobic ntawm cov kab mob micelles yuav tsim cov tshuaj hydrogen sulfide, uas muab cov xwm txheej rau kev loj hlob ntawm cov kab mob filamentous. Yog li ntawd, lub sij hawm tuav hydraulic ntawm lub anaerobic selector yuav tsum tsis txhob ntev dhau.
Hauv kev ua haujlwm tiag tiag, nrog rau peb txoj hauv kev saum toj no, kev tswj xyuas ib ntus yuav tsum tau muab qhov tseem ceeb raws li qhov xwm txheej tiag tiag los tiv thaiv lub kaw lus tsis ua haujlwm vim qhov poob loj ntawm sludge. Nyob rau tib lub sijhawm, qhov ua rau sludge bulking yuav tsum tau ua tib zoo txheeb xyuas, pib los ntawm cov hauv paus hauv paus, thiab siv cov txheej txheem kev hloov kho cov txheej txheem los tswj qhov tshwm sim ntawm bulking. Rau cov nroj tsuag kev kho mob nrog ntau dua thiab hnyav sludge bulking, kev ntsuas mus tas li yuav tsum tau coj los hloov lawv nyob rau lub sijhawm kom tsis txhob dhau mus ntev.
Sau los ntawm: Jasmine
Contact email: Jasmine@juntaiplastic.com