Vim li cas Kev Saib Xyuas Kev Ua Kom Tsis Zoo Oxygen (DO) yog qhov tseem ceeb nyob rau niaj hnub no Environmental Landscape
Kev ua raws li ib puag ncig yog nruj thoob plaws ntiaj teb - los ntawm California thiab kev lag luam Midwest mus rau Ruhr hauv lub teb chaws Yelemees thiab Northern Ltalis. Nrog rau cov qauv nruj dua, cov phiaj xwm tau hloov kho kom tau raws li cov kev cai niaj hnub ib puag ncig. Kev tsis ua raws cai tuaj yeem ua rau raug nplua hnyav lossis raug yuam kaw los ntawm cov tub ceev xwm ib puag ncig. Hauv kev ua lag luam niaj hnub no, kev saib xyuas lub sijhawm ntawm qhov tseem ceeb xws li pH, DO (Dissolved Oxygen), thiab COD (Chemical Oxygen Demand) tsis yog xaiv tab sis yuav tsum tau ua.
Dissolved Oxygen (DO) yog dab tsi?
Dissolved Oxygen (DO) yog hais txog cov pa oxygen uas muaj nyob hauv dej, feem ntau ntsuas hauv mg/L lossis ppm. DO yog qhov tseem ceeb parameter vim tias:
- Cov kab mob aerobic xav tau cov pa oxygen los rhuav tshem cov pa phem.
- Thaum DO qib poob qis dhau lawm, cov kab mob anaerobic tau dhau mus, ua rau muaj kev puas tsuaj, dej dub, ntxhiab tsw phem, thiab txo qis kev ua kom huv ntawm tus kheej.
Hauv luv luv, DO yog qhov taw qhia tseem ceeb ntawm lub cev dej kev noj qab haus huv. Kev rov qab sai sai hauv DO tom qab depletion qhia txog kev noj qab haus huv, qhov kev rov qab qeeb qeeb yog tus chij liab rau cov pa phem hnyav thiab tsis muaj zog ecological resilience.
Tej yam cuam tshuam rau DO qib
- Oxygen ib nrab siab hauv huab cua
- Atmospheric siab
- Dej kub
- Dej zoo
Kev nkag siab txog cov xwm txheej no yog qhov tseem ceeb rau kev txhais DO nyeem ntawv thiab ua kom muaj kev ntsuas dej kom raug.
Cov ntawv thov siv rau kev soj ntsuam cov pa oxygen
Aquaculture
Lub hom phiaj:Xyuas kom cov ntses thiab cov tsiaj nyob hauv dej tau txais oxygen txaus.
Cov txiaj ntsig:Ua kom muaj kev ceeb toom ntawm lub sijhawm tiag tiag thiab kev siv lub tshuab aeration los txhawb kev noj qab haus huv ecosystem.
Environmental Water Monitoring
Lub hom phiaj:Ntsuas cov pa phem thiab kev noj qab haus huv ntawm cov pas dej, cov dej ntws, thiab cov ntug dej hiav txwv.
Cov txiaj ntsig:Pab tiv thaiv eutrophication thiab coj kev kho mob.
Wastewater Treatment Plants (WWTPs)
Lub hom phiaj:DO yog qhov tseem ceeb ntawm kev tswj hwm qhov sib txawv hauv aerobic, anaerobic, thiab aeration tanks.
Cov txiaj ntsig:Txhawb nqa microbial tshuav nyiaj li cas thiab kev kho kom zoo los ntawm kev ua haujlwm nrog rau cov tsis xws li BOD / COD.
Corrosion Control nyob rau hauv Industrial Water Systems
Lub hom phiaj:Kev soj ntsuam ultra-low DO qib (hauv ppb / μg / L) tiv thaiv cov pa oxygen-induced corrosion hauv steel pipelines.
Cov txiaj ntsig:Qhov tseem ceeb rau cov nroj tsuag hluav taws xob thiab lub tshuab boiler qhov twg corrosion tuaj yeem ua rau raug nqi kho.
Ob Txoj Haujlwm Ua Haujlwm DO Sensing Technologies
1. Electrochemical (Membrane-raws li) Sensors
Lawv ua haujlwm li cas:Kuj tseem hu ua polarographic lossis Clark-type sensors, cov khoom siv no siv cov khoom siv semi-permeable los cais cov chav electrolyte los ntawm dej. Oxygen diffuses los ntawm daim nyias nyias, txo ntawm platinum cathode, thiab ua kom muaj qhov sib npaug tam sim no rau qib DO.
Pros:Pov thawj technology nrog zoo rhiab heev.
Cons:Yuav tsum tau lub sij hawm sov so (15-30 feeb), haus cov pa oxygen, thiab xav tau kev saib xyuas tsis tu ncua (electrolyte refill, membrane hloov, nquag recalibration).
2. Optical (Luminescent) Sensors
Lawv ua haujlwm li cas:Cov sensors siv lub teeb pom kev hauv lub teeb kom emit xiav lub teeb, zoo siab rau cov xim luminescent. Cov xim emits liab; Txawm li cas los xij, oxygen quenches no fluorescence (dynamic quenching). Lub sensor ntsuas cov theem hloov lossis lwj hauv lub teeb siv los xam DO concentration.
Pros:Tsis muaj kev sov so, tsis muaj oxygen, kev saib xyuas tsawg (feem ntau 1-2 xyoos siv tas li), muaj tseeb thiab ruaj khov, thiab tsis muaj kev cuam tshuam.
Cons:Tus nqi siab dua (feem ntau yog $ 1,200– $ 3,000 USD vs. $ 300– $ 800 USD rau cov membrane sensors).
Kev Taw Qhia Kev Xaiv Sensor
Membrane-raws li Sensors
Qhov zoo tshaj plaws rau:Cov ntawv thov uas tus nqi pib yog qhov tseem ceeb thiab kev ntsuas lub sij hawm luv luv tau txais.
Kev sib tw:Yuav tsum tau nplawm kom zoo los yog ntws kom tsis txhob muaj oxygen depletion; rhiab heev rau npuas thiab yuav tsum tau saib xyuas tsis tu ncua.
Optical Sensors
Qhov zoo tshaj plaws rau:Lub sij hawm ntev, kev saib xyuas siab nyob rau hauv qhov xav tau ib puag ncig.
Kev txiav txim siab:Thaum lawv kim dua ua ntej, lawv txo qis qis qis, muaj lub luag haujlwm qis dua, thiab muab qhov tseeb dua thiab ruaj khov nyob rau lub sijhawm.
Rau feem ntau kev lag luam niaj hnub no-qhov kev ntseeg siab, kev ruaj ntseg, thiab kev saib xyuas tsawg tsawg yog qhov tseem ceeb-optical DO sensors yog qhov ntse dua kev nqis peev mus sij hawm ntev.
Lo Lus Kawg: Kev nqis peev hauv Kev Tswj Xyuas Zoo
Nyob rau hauv lub ntsej muag ntawm ib puag ncig kev cai nruj, kev saib xyuas kom raug DO tsis yog ib qho kev cai lij choj nkaus xwb - nws yog ib qho tseem ceeb ntawm kev noj qab haus huv ecosystem thiab kev lag luam muaj txiaj ntsig.
Yog tias koj tab tom nrhiav kev ntseeg siab ntev, kev saib xyuas tsis zoo, thiab cov ntaub ntawv zoo dua, xav txog qhov kho qhov muag DO meters txawm tias lawv cov nqi pib dua. Lawv muab cov kev daws teeb meem zoo dua los ntawm kev xa cov kev ua tau zoo ib yam, txo qis kev ntsuas zaus, thiab muab kev ntseeg siab dua hauv koj cov ntaub ntawv ib puag ncig.
Npaj los txhim kho koj qhov DO Monitoring System?
Post lub sij hawm: Apr-14-2025