Hauv txoj kev ua kom tsis muaj kab noj ntawm cov zaub mov kev lag luam dej, cov txheej txheem ib txwm yog siv cov tshuaj tua kab mob uas muaj cov tshuaj tua kab mob thiab ua kom sov kom tsis muaj menyuam. Ntxiv rau, cov txheej txheem xws li kev kho mob ozone, ultraviolet hluav taws xob, thiab membrane (UF / MF) kev kho kuj tseem siv. Cov hau kev no lawv muaj lawv qhov zoo thiab qhov tsis zoo. Tom qab kawm txog lawv qhov, qhov dav ntawm daim ntawv thov thiab kev ceev faj, lawv tuaj yeem siv tau ywj pheej raws li cov xwm txheej tshwj xeeb.
Ozone sterilization
1. Ozone disinfection mechanism thiab kev ua kom zoo rau cov yam ntxwv.
Kev txiav txim siab ntawm cov pa roj tau tsim cov pa tshiab thiab cov pa oxygen. Cov pa oxygen tshiab tuaj yeem ua rau cov phab ntsa thiab xovtooj ntawm tes, xws li cov kab mob thiab kab mob, thiab hnov mob nrog qhov sib txuas ob zaug ntawm lipids (lipid compounds). Nyob rau hauv txoj kev no, lub cell membrane yuav raug rhuav tshem, thiab cov enzyme kuj tseem yuav raug rhuav tshem, uas ua rau cov kab mob bactericidal ua haujlwm.
Cov tshuaj hu ua ozone fungicide nrog qhov siab ntawm 0.3 ~ 0.5mg / L yog siv los ua kom tsis muaj kab spores ntawm Bacillus. Cov kab mob lactic acid muaj cov tsis muaj zog tiv taus ozone. Cov ntawv tshaj tawm qhia tias feem ntau ntawm cov kab mob hauv qhov pib 2.3 ~ 5.6 × 109 / mL, hauv 30 vib nas this ntawm kev kho mob ozone, tuag.
Cov nyhuv bactericidal ntawm ozone nws txawv heev nyob ntawm cov xovtooj ntawm phab ntsa lossis cell daim nyias nyias, thiab hom microorganisms.
Nws siv sijhawm ntev los kho cov noob kab mob thiab cov poov xab ntawm Bacillus nrog ozone, tab sis yog tias ozone cov tshuaj lom neeg ntau ntxiv, lub sijhawm cov tshuaj tiv thaiv tuaj yeem txo qis dua kom tsim nyog. Qhov tseeb, lub ozone concentration thiab hu rau lub sijhawm tiv thaiv lub sijhawm tuaj yeem txiav txim siab raws li hom kab mob, thiab tseem tuaj yeem xaiv ua haujlwm yam tsim nyog.
Nqa tawm ozone sterilization raws li cov qauv dej haus, lub sijhawm tiv thaiv kev sib cuag tuaj yeem ncav cuag 5 ~ 8 feeb, qhov kub siab ntawm ozone qhov hluav taws xob ntawm qhov hluav taws xob tawm ntawm lub tshuab hluav taws xob tso siab dua li 0.4mg / L (txhaj tshuaj npaum li cas 2 ~ 3mg / L), feem ntau Cov xwm txheej saum toj saud yog siv ua kev ntsuas kev tswj hwm kev ua haujlwm. Nyob rau hauv tib txoj kev, tus nqi txhaj tshuaj ozone yuav tsum tau nce rau 5mg / L, thiab hauv cov dej kho hauv txoj kev no, cov kab mob feem ntau tsis tuaj yeem muaj sia nyob.
2. Lub ozone sterilization method hauv dej tsis yog tsuas siv cov khoom siv kom tsis muaj menyuam, tab sis txheej txheem kom tsis muaj menyuam.
Txhawm rau tsim txoj kab ke no, cov ntsiab lus hauv qab no yuav tsum raug sau tseg.
(a) Xaiv cov khoom siv ozone uas tuaj yeem tsim cov ozone ruaj khov thiab ua nws puv ntawm qhov tseem ceeb. Xyoo tsis ntev los no, cov kev tshawb fawb tau nce qib thiab theem kev ntawm nws cov kev ua haujlwm lom neeg ozone tau zoo dua. Muaj cov ozone generators rau ntawm kev ua lag luam, thiab ntau hom qauv muaj, xws li ntsiag to paug tawm hom, homopolar phaj hom, ceramic nto paug hom thiab lwm yam. Los ntawm cov tshuab me me ntawm 15g / h mus rau lub cav loj ntawm 40kg / h, PSA oxygenator tuaj yeem siv los ua cov kab ke.
(b) Kev ua kom zoo dua ntawm ozone raw cov khoom siv: Ntxiv rau cov khoom siv ozone me me siv los tsim cov ozone lossis txias cia, kev lag luam huab cua ozone biomass kuj tseem yuav tsum tau huab cua ntshiab thiab siv los ua ozone raw cov ntaub ntawv kom ua tiav cov hmoov av tshem tawm thiab dehumidification. Feem ntau hais lus, lub suab ntawm ozone tsim tawm los ntawm kev siv hluav taws xob tso kua hluav taws xob tso rau huab cua yog 1 mus rau 3% thaum huab cua siv los ua cov khoom siv raw, thiab 2 mus rau 6% thaum oxygen siv los ua cov khoom siv raw. Yog hais tias txheej txheem ntxuav lub cev tsis zoo tag nrho, nws tsis yog tsuas yog kev tsim ua ozone xwb. Qhov kev ua tau zoo yog tsawg, thiab qhov tsis txaus qhia ntawm cov ntaub ntawv raw nkag mus rau hauv qhov dej tshuaj kho dej thiab ua cov pa nitrogen.
Lub ozone sterilization method siv nyob rau hauv cov zaub mov tsim tawm dej, thiab cov khoom siv ozone yuav tsum yog cov pa oxygen lossis PSA cov tshuab hluav taws xob.
(c) Hu rau lub sijhawm tiv thaiv nyob nruab nrab ntawm dej thiab dej hiav txwv: Tus nqi ntawm cov tshuaj ozone thiab lub sijhawm tiv thaiv lub sij hawm tiv thaiv tau txiav txim siab los ntawm hom kab mob me me uas yuav tsis muaj kab mob thiab hom phiaj kom tsis muaj menyuam. Cov xwm txheej no suav nrog cov nqi tsim kho.
(d) tswj kev tswj hwm Ozone: Txhawm rau ua kom nws ua kom tsis txhob ua paug ua paug, nws yuav tsum tau saib xyuas nws thiab kev txhim kho huab cua kom nws nyob rau ib qho chaw uas tsim nyog. Ntxiv rau qhov ntsuas qhov siab txog kev ntsuas kub dhau mus txog ozone concentration meter, ib qho ntsuas pheej yig ntawm tes ntsuas kub ozone concentration kuj tau tsim. Yog li, nws yog qhov yuav tsum tau saib xyuas lub ozone siab tsis tu ncua thiab kho nws. Hauv cov txheej txheem kev faib tawm, dej hiav txwv nyob rau hauv dej yuav zam dhau txoj kev tawm ntawm lub kaw lus, yog li nws yuav tsum raug kho nrog kev ua kom raug mob kom ua rau nws cov pa pov tseg tsawg dua li qhov xav tau.
2. Txoj kev siv tshuaj tua kab mob ultraviolet hluav taws xob.
UV kom tsis muaj menyuam tshuab thiab cov yam ntxwv ntawm kev siv thev naus laus zis thev naus laus zis.
Cov duab xaim hluav taws xob nrog lub ntsej muag ntev txog 200 ~ 290 hli tuaj yeem tiv thaiv tau los ntawm cov kab mob cell ntawm cov kab mob los yog kab mob, ua rau kev puas tsuaj rau kev tswj hwm qhov tshwm sim thiab kev ua haujlwm ntawm nucleic acid (DNA), ua rau nws poob lub peev xwm rau kev yug me nyuam, yog li ua tiav kev ua kom tsis muaj menyuam.
Nucleic acid (DNA) yog qhov yooj yim tshwj xeeb rau nqus hauv qab ultraviolet hluav taws xob ntawm 250 ~ 260mm wavelength. Yog li, ultraviolet rays ntawm lub yoj yoj no muaj cov kab mob ua kom muaj zog. Kev kom tsis muaj menyuam yog ua tiav raws li qhov ntau ntawm cov xaim hluav taws xob uas yuav tsum tua cov kab mob me me, tsis muaj kev hloov pauv hauv cov dej tsis huv, thiab ua kom tsis muaj menyuam sai sai nyob rau lub sijhawm luv luv, uas muaj cov teebmeem zoo. Tsis tas li ntawd, txoj kev kho mob ua tiav rau ntawm kev ncaj ncaj raj lub tshuab.
Raws li kev tua kab mob ultraviolet, qhov sib piv ntawm qhov muaj peev xwm tua kab mob rau ultraviolet hluav taws xob hauv cov dej kho yog mw · s / cm ^ 2 (kev siv tshuaj tua kab mob ultraviolet sib xyaw [mw / cm ^ 2 × sij hawm]). Tus nqi ntawm cov hluav taws xob ultraviolet muaj feem xyuam nrog kev ua kom tsis muaj menyuam.
Qhov rhiab ntawm ntau yam kab mob sib kis mus rau ultraviolet rays txawv ntawm hom mus rau hom. Raws li lub Hoobkas ntsuas cov qhab nia ntawm Bacillus (suav nrog B.subtlis), hauv qab qhov tsis muaj ntawm D10=12.5mw · s / cm ^ 2, cov nyhuv bactericidal tuaj yeem ncav cuag 99.5%. Yog li ntawd, kev tsim hluav taws xob teeb pom kev ntawm lub cuab yeej tiag tiag yog sib npaug rau D10 × 4, uas yog, 50mw · s / cm ^ 2.
Siv qee lub sijhawm thiab kev ceev faj txog kev ua kom tsis muaj kab mob ultraviolet
1. Kev xaiv cov khoom siv tua kab mob ultraviolet: Thaum xaiv cov khoom siv tua kab mob ultraviolet, tus nqi ntawm cov pa roj tso tawm yuav tsum siv raws li tus qauv, thiab thaum xaiv cov khoom siv tua kab mob ultraviolet, tus nqi dej kho yuav tsum siv raws li tus qauv. Lub teeb pom kev siv ntawm lub teeb pom kev zoo tshem tawm cov kab mob ntxiv nrog kev txuas ntxiv ntawm kev siv sijhawm. Yog li, qhov kev xaiv ntawm qhov xav tau ntawm cov hluav taws xob ultraviolet yuav tsum yog nyob ntawm kev pab lub neej ntawm cov teeb.
2. Cov yam ntxwv ntawm cov dej uas yuav tsum tau kho: siv cov txheej txheem ultraviolet sterilization, raws li tus nqi ntawm ultraviolet hluav taws xob xav tau los ntawm cov kab mob hauv cov dej los kho, nws tuaj yeem ua nws lub luag haujlwm thaum pib. Yog li, nws yog qhov teeb meem nyuaj los kho qhov transmittance hauv dej nrog lub teeb ci ultraviolet. Tshwj xeeb tshaj yog rau dej los yog qab zib kua uas muaj qhov sib xyaw, thaum xaiv qhov yuav tsum muaj ntawm cov hluav taws xob tiv thaiv ultraviolet hluav taws xob, yuav tsum muaj kev cuam tshuam los ntawm dej ultraviolet.
3. Qhov ntsuas kub ntawm qhov kub: feem ntau, cov ntsuas pa hluav taws xob qis me me siv. Hauv qab qhov kub ntawm huab cua sov txog 40 ~ 50 ℃, lub teeb ci ultraviolet muaj qhov zoo tshaj plaws ua haujlwm siab. Thaum cov dej kub tsis tshua dhau, qhov ua kom tsis muaj menyuam yog qhov tsis zoo, uas yuav tsum tau suav hais tias yog.
