Ib qho kev kho dej UV yuav tsum raug xaiv rau cov koob tshuaj uas nws tuaj yeem xa tuaj raws li qhov nws yuav ua haujlwm. Hluav taws xob wattage muaj txiaj ntsig zoo rau kev npaj cov khoom siv hluav taws xob thiab cov nqi khiav, tab sis nws tsis tuaj yeem tsim kom muaj microbial kev ua tau zoo ntawm nws tus kheej. Rau cov neeg xa khoom, OEM hom thiab cov kev kho dej sib xyaw ua ke, sib piv cov reactor mus rau qhov siab tshaj plaws, dej zoo thiab lub hom phiaj kho yog qhov pib txhim khu kev qha.

Tshaj tawm cov kev ntsuam xyuas lub tshuab hluav taws xob thiab cov ntaub ntawv tswj xyuas cov koob tshuaj piav qhia vim li cas. Tib cov cuab yeej tuaj yeem xa cov txiaj ntsig sib txawv raws li kev ua haujlwm hloov pauv, thaum cov kab mob sib txawv yuav tsum tau txhaj tshuaj sib txawv. Cov piv txwv hauv qab no cais cov kev ntsuas keeb kwm, kev tswj hwm qhov tseem ceeb thiab cov lus piav qhia suav kom txheeb xyuas txhua qhov kev txiav txim siab.

Nkag siab qhov watage piav qhia

Ua ntej sib piv ob nqe lus, tsim kom pom seb cov watts tau hais qhia txog kev siv hluav taws xob tag nrho, teeb pom kev zoo lossis emission UV optical zog. Cov no yog qhov sib txawv. Kev ntsuas hluav taws xob siab dua tsis qhia tus neeg yuav khoom ntau npaum li cas cov teeb pom kev zoo mus txog cov kab mob thoob plaws hauv lub reactor.

UV koob tshuaj sib xyaw ua ke raug siv thiab lub sijhawm. Nyob rau hauv tas li, tsis xwm yeem raug, 2 mW / cm² rau 20 vib nas this muab 40 mJ / cm². Qhov no yog kev qhia suav, tsis yog kev ua haujlwm ntawm cov reactor. Cov dej tiag tiag ua raws txoj kev sib txawv los ntawm cov cheeb tsam ntawm qhov sib txawv ntawm qhov sib txawv, ua rau kev faib cov koob tshuaj. Reactor geometry thiab hydraulics yog li tseem ceeb nrog rau lub teeb ci.

Wattage tseem ceeb: ntxiv cov khoom siv UV tuaj yeem ua kom muaj peev xwm kho tau. Kev yuav khoom yuam kev yog kho cov khoom siv hluav taws xob los hloov cov pov thawj ntawm kev xa khoom.

Flow hloov kev ua tau zoo ntawm tib lub zog teeb tsa

Cov ntawv xeem uas tau sau tseg hauv US EPA's UV Disinfection Guide Guide Manual muab ib qho piv txwv zoo. Nrog yim lub teeb ua haujlwm ntawm 60% lub zog teeb tsa, ntws ntawm 9.7, 4.9 thiab 2.0 lab US nkas loos ib hnub ua tau ntsuas MS2 txo qhov sib npaug ntawm 39.4, 58.4 thiab 112.7 mJ / cm², feem. UVT zoo ib yam, tab sis tsis zoo ib yam: 87.4%, 87.8% thiab 88.0%.

Qhov qis tshaj plaws sib raug mus rau kwv yees li 2.86 npaug ntawm qhov ntsuas ntsuas ntawm qhov ntws siab tshaj plaws. Kev teeb tsa hluav taws xob ib leeg yog li tsis tau piav qhia txog kev ua haujlwm. Cov txiaj ntsig keeb kwm no qhia txog qhov tseem ceeb ntawm kev sib txuam ntws mus rau lub reactor; lawv tsis yog universal sizing nkhaus.

MS2 yog qhov kuaj kab mob, thiab txo qhov sib npaug koob tshuaj tsis yog koob tshuaj zaum kawg. Cov kev ntsuam xyuas ua ntej qhov kev taw qhia zaum kawg, uas sau tseg qhov sib txawv ntawm cov ntaub ntawv txheeb xyuas thiab kev siv tau zoo. Siv cov txiaj ntsig kom nkag siab txog kev sib raug zoo, tsis txhob muab lub peev xwm rau lwm qhov system.

Daim duab 1. Keeb kwm ntsuas MS2 txo cov koob tshuaj sib npaug ntawm qhov teeb tsa hluav taws xob ruaj khov. Source: US EPA, 2006, Table F.4.

Muab cov koob tshuaj rau lub hom phiaj microbial

Ib daim ntawv thov xws li "99.99% inactivation" tsis tiav tshwj tsis yog nws txheeb xyuas cov kab mob thiab cov kev sim. Plaub lub log inactivation sawv cev rau 99.99%, tab sis ua tiav qhov kev txo qis tsis sib npaug rau txhua lub hom phiaj microbial.

Teb Chaws Asmeskas cov lus tswj hwm hauv 40 CFR 141.720(d)(1) teev plaub qhov kev kho mob credit koob tshuaj ntawm 22 mJ / cm² rau Cryptosporidium, 22 mJ / cm² rau Giardia lamblia thiab 186 mJ / cm² rau tus kab mob. Tus kab mob tus nqi yog kwv yees li 8.45 npaug ntawm tus nqi protozoan.

Cov txiaj ntsig no siv nyob rau hauv cov kev cai tswj hwm dej haus pej xeem uas tau teev tseg thiab ua raws li 254 nm lub teeb los ntawm cov teeb hluav taws xob tsis tshua muaj mercury. Lawv tsis yog universal sizing thresholds rau txhua daim ntawv thov lossis LED wavelength. Lwm hom teeb yuav tsum tau ua qauv qhia ntawm qhov sib npaug ntawm cov tshuaj tua kab mob los ntawm reactor validation nyob rau hauv lub moj khaum ntawd. A 40 mJ / cm² specification yog li ntawd tsis tau txais kev txhawb nqa plaub teev tus kab mob credit.

Daim duab 2. Kev cai koob tshuaj rau plaub lub log inactivation credit. Source: 40 CFR 141.720.

Cov dej zoo hloov pauv npaum li cas UV mus deb

UV transmittance, los yog UVT, piav qhia txog qhov feem ntawm lub teeb hla dej ntawm qhov teev wavelength thiab txoj kev ntev. Rau kev kho dej UV cov pa, nws feem ntau tshaj tawm ntawm 254 nm txog 1 cm. Ib qho piv txwv pom tseeb tsis yog qhov hloov pauv rau qhov ntsuas no.

Ib qho piv txwv Beer-Lambert suav ua rau pom cov nyhuv. Rau homogeneous absorbing dej, kis thoob plaws tsib centimeters sib npaug rau tsib lub zog ntawm ib centimeter kis tau tus mob. Dej ntsuas 95%, 85% thiab 75% UVT yog li kis kwv yees li 77.4%, 44.4% thiab 23.7% hla qhov kev ncua deb, feem.

Daim duab 3 yog suav cov piv txwv kho qhov muag, tsis ntsuas qhov kev ua haujlwm ntawm lub tshuab hluav taws xob. Nws tsis suav nrog kev tawg thiab kev xav, thiab nws cov feem pua ​​​​tsis tuaj yeem hloov pauv ncaj qha mus rau hauv microbial txo lossis xa cov koob tshuaj. Nws cov lus siv tau yog tias qhov ntsuas tau tsim nrog cov dej UVT siab yuav tsum tsis txhob raug xa mus rau qis UVT dej yam tsis muaj kev txhawb nqa cov ntaub ntawv ua haujlwm.

Daim duab 3. xam lub teeb kis tau tus mob siv Beer-Lambert attenuation. UVT yog txhais ntawm 254 nm tshaj 1 cm.

Tig qhov sib txuam rau hauv kev yuav khoom specification

Pib qhov kev nug nrog daim ntawv thov, yuav tsum tau txo qis microbial, ncov txaus thiab qis tshaj qhov xav tau UVT. Siv cov kev ua haujlwm tiag tiag es tsis yog qhov nruab nrab ntawm kev noj txhua hnub. Nug seb qhov kev thov yuav ua li cas thaum lub sijhawm xav tau ib txhij, hloov dej raws caij nyoog thiab qhov kawg ntawm lub teeb tau teev tseg lossis lub sijhawm ua haujlwm module.

Cov lus piav qhia txog kev yuav khoom yuav thov 3.6 m³ / h ntawm 40 mJ / cm² nrog qhov tsawg kawg nkaus UVT ntawm 85% ntawm 254 nm. Cov lej no piav qhia txog qhov kev thov tsim, tsis yog cov khoom pov thawj muaj peev xwm. Cov lus hais qhia tib yam nkaus xwb ntawm 95% UVT tawm cov lus nug tseem ceeb tsis teb. Tus neeg muag khoom yuav tsum tau muab cov ntaub ntawv pov thawj tsim nyog, hais kom tsim nyog pretreatment lossis kho qhov kev xaiv. Kev nce lub nameplate wattage yam tsis tau kuaj xyuas cov haujlwm ua haujlwm tsis kaw qhov sib txawv ntawm cov pov thawj.

Thov ib daim qauv qhia txog kev ua tau zoo thiab nws cov kev txwv. EPA's UV Treatment Toolkit piav qhia tias validation ntsuam xyuas lub reactor hla kev khiav hauj lwm tej yam kev mob; nws qhov kev ntsuam xyuas koob tshuaj suav nrog qhov muaj txiaj ntsig zoo dua li kev kho txhua qhov kev txo qis qhov sib npaug li qhov koob tshuaj zaum kawg. Qhov kev sib txawv no tseem ceeb thaum sib piv cov txiaj ntsig hauv chav kuaj nrog kev lag luam kev thov.

Rau ib txoj haujlwm OEM, muab cov kev lees paub hauv kev sau ntawv: lub hom phiaj koob tshuaj lossis txo qis microbial, qhov siab tshaj plaws, qhov tsawg kawg nkaus UVT, qhov kub thiab txias, qhov kev xav tau thiab kev saib xyuas yuav tsum tau ua. Paub meej tias cov ntaub ntawv pov thawj npog lub chamber tiag tiag, qhov chaw teeb pom kev zoo thiab tus tswj tau muab. Daim ntawv pov thawj tivthaiv tsis tuaj yeem teb tag nrho cov lus nug txog kev ua haujlwm.

Tshawb xyuas kev tiv thaiv kev ua haujlwm thiab cov ntaub ntawv pov thawj

Kuj txhais tau tias yuav muaj dab tsi tshwm sim thaum cov kev kho mob txav mus sab nraum qhov kev lees paub. Nug seb lub kaw lus puas pom qhov tsis txaus UV siv, ntau dhau los lossis lub teeb tsis ua haujlwm, thiab yuav ua li cas tom qab ntawd. Lub tswb ceeb toom uas ceeb toom rau tus neeg teb xov tooj thiab ib qho kev cuam tshuam uas tso tseg dej ua haujlwm sib txawv. Xaiv cov lus teb nyob ib ncig ntawm daim ntawv thov thiab nws qhov kev pom zoo tsim kho, tom qab ntawd paub meej tias kev teeb tsa, commissioning thiab tu lub luag haujlwm.

Tshawb xyuas daim ntawv qhia ua tiav es tsis yog ib feem pua ​​​​ntawm cov xov xwm. Sau cov kev sim ntws, dej, dej, kab mob, reactor configuration thiab kev pab cuam assumptions. Yog tias ib daim ntawv tshaj tawm tawm ib qho ntawm cov tsis tau teev tseg, thov kom meej meej ua ntej siv nws cov txiaj ntsig los txhawb qhov tshwj xeeb thov kev teeb tsa.

Rau UVC LED cov lus pom zoo, nug txog qhov emission wavelength thiab cov xwm txheej siv hauv kev sim microbial. Tsis txhob hloov cov txiaj ntsig los ntawm qhov sib txawv wavelength, kab mob los yog reactor configuration. Cov ntaub ntawv pov thawj cuam tshuam yog kev ua haujlwm ntawm cov khoom siv hauv nws cov ntaub ntawv ua haujlwm.

Sib piv kev siv hluav taws xob tsuas yog tom qab ob qhov kev pom zoo ua tau raws li lub hom phiaj kev kho mob tib yam raws li qhov sib piv. suav nrog cov khoom hloov pauv, kev pabcuam thiab kev kho ua ntej hauv kev sib piv kev lag luam. Ib chav tsev pheej yig dua lossis qis dua wattage muaj nqis me ntsis yog tias nws cov ntaub ntawv ua haujlwm ntau yam tsis suav nrog kev teeb tsa.

Xaiv los ntawm kev ua tau zoo

Xaiv lub tshuab UV uas ua tau raws li qhov yuav tsum tau txhaj tshuaj ntawm qhov tseeb qhov siab tshaj plaws thiab dej zoo. Sib piv lub zog thiab tus nqi tom qab paub meej tias qhov kev ua tau zoo.