Nws yuav tsum tau hais tias txhua qhov chaw hauv ntiaj teb uas tib neeg nyob thiab qhov chaw muaj cov tuam txhab tsim khoom, muaj cov dej phwj hauv tsev thiab cov teeb meem kev kho dej khib nyiab.
Tam sim no, txoj hauv kev tseem ceeb ntawm kev tshem tawm cov organic teeb meem hauv cov dej phwj tuaj yog kev kho mob lom, uas muaj kev tshem tawm siab thiab txo nqi kho mob. Txawm li cas los xij, cov pa phem tshem tawm los ntawm txoj kev kho kab mob lom tau yooj yim biodegradable (lossis biodegradable) cov tshuaj hauv dej, thiab yuav luag tsis muaj kev cuam tshuam rau kev tshem tawm cov tshuaj biodegradable. Qee cov organic tshuaj lom rau cov kab mob. Hauv cov xwm txheej no, cov txheej txheem lom neeg tsis haum.
Electrolysis yog ib txoj kev kho mob uas siv cov tshuaj tiv thaiv electrochemical ntawm cov txheej txheem electrolysis kom tshem tawm cov teeb meem impurities hauv ntau cov dej phwj tuaj. Nws tseem hu ua electrocatalytic oxidation method, lossis electrochemical method. Nws kho cov dej, suav nrog cov dej phwj hauv tsev thiab cov dej khib nyiab hauv tsev. Vim Nws tsis ua rau cov pa phem thib ob thiab yog li ntawd hu ua environmentally friendly water treatment technology, los yog ntsuab dej kho tshuab.
Los ntawm txoj kev xav, lub npe hu ua electrochemical dej kho tshuab siv hluav taws xob sab nraud kom ua tiav qhov kev xav tau tshem tawm cov pa phem hauv cov dej khib nyiab los ntawm kev tsim cov tshuaj tiv thaiv, cov txheej txheem electrochemical lossis cov txheej txheem ntawm lub cev hauv ib lub tshuab hluav taws xob tshwj xeeb. los yog lub hom phiaj ntawm kev rov ua dua cov ntaub ntawv tseem ceeb.
Raws li thaum ntxov xyoo 1930 thiab 1940s, cov kws tshawb fawb txawv teb chaws tau npaj siv electrolysis los kho cov dej khib nyiab. Lub sijhawm ntawd, nws yog siv los kho cov hlau hnyav ions hauv cov dej khib nyiab. Txawm li cas los xij, vim muaj kev siv hluav taws xob ntau, tsis muaj hluav taws xob thiab kev txwv ntawm electrochemical txoj kev xav, txoj kev loj hlob ntawm txoj kev no qeeb. Hauv xyoo 1960 thiab 1970s, kev lag luam hluav taws xob hluav taws xob tau tsim sai heev. Kev tshawb fawb ntawm coated titanium anodes tau ua tiav thiab industrialized. Kev tshawb fawb txuas ntxiv ntawm electrochemical theoretical tau lees paub tias cov tshuaj tiv thaiv redox, cov tshuaj tiv thaiv ntxiv lossis cov tshuaj tiv thaiv decomposition ntawm ntau cov organic tebchaw tuaj yeem ua los ntawm electrodes, qhov no muab lub hauv paus theoretical rau degradation ntawm organic pollutants los ntawm electrocatalytic oxidation, yog li txhawb kev siv tshuab electrolysis. hauv kev kho dej.
Qhov zoo ntawm electrochemical dej kho tshuab yog:
1.Kev hloov hluav taws xob tsuas yog ua los ntawm cov khoom siv hluav taws xob thiab cov dej khib nyiab, tsis tas yuav tsum tau ntxiv cov tshuaj redox ntxiv, tsis txhob muaj teeb meem kev ua qias tuaj los ntawm cov khoom siv ntxiv.
2.Cov kev mob tshwm sim tuaj yeem hloov kho txhua lub sijhawm los ntawm kev hloov pauv tam sim no thiab qhov hluav taws xob, thiab kev tswj hwm muaj zog.
3.Cov dawb radicals uas yuav raug generated thaum lub sij hawm tus txheej txheem ncaj qha react nrog cov organic pa phem nyob rau hauv cov dej khib nyiab indiscriminately, degrading lawv mus rau hauv carbon dioxide, dej thiab yooj yim organic teeb meem, tsis muaj los yog me ntsis cov pa phem thib ob.
4.Cov kev mob tshwm sim yog me me, thiab cov txheej txheem electrochemical feem ntau tuaj yeem nqa tawm ntawm chav tsev kub thiab siab.
5.Reactor cov cuab yeej thiab nws cov haujlwm feem ntau yog qhov yooj yim thiab, yog tias tsim kom zoo, tsis kim.
6.Yog qhov ntsuas ntawm cov dej phwj tuaj me me, kev kho ntawm qhov chaw tuaj yeem ua tiav.
7.Thaum cov dej khib nyiab muaj cov hlau ions, cov cathode thiab anode tuaj yeem ua haujlwm tib lub sijhawm (cathode txo cov hlau ions thiab cov anode oxidizes organic teeb meem) kom ua kom zoo tshaj plaws kev kho mob thaum rov qab thiab rov siv cov tshuaj muaj txiaj ntsig lossis hlau.
8.Nws tuaj yeem siv los ua kev kho mob sib cais lossis ua ke nrog lwm yam kev kho mob. Piv txwv li, raws li kev kho ua ntej, nws tuaj yeem txhim kho biodegradability ntawm cov dej khib nyiab.
9.Nws muaj cov haujlwm ntawm huab cua flotation, flocculation thiab tshuaj tua kab mob.
10.Raws li cov txheej txheem tu, nws cov khoom siv nyob hauv ib cheeb tsam me me thiab tshwj xeeb tshaj yog haum rau kev kho dej phwj hauv nroog uas muaj neeg coob.
Cov txheej txheem electrocatalytic oxidation muaj qhov zoo ntawm kev muaj zog oxidation thiab txo cov peev xwm tshaj li cov tshuaj tiv thaiv zoo tib yam, tsawg dua cov tshuaj siv tshuaj, muaj zog yoog raws, rov ua dua cov khoom siv xws li hlau, thiab kev tswj kom yooj yim automation. Yog li ntawd, nws yog tsim nyog rau siv nyob rau hauv daim ntawv thov uas muaj hydrocarbons, aldehydes, thiab cawv Nws yog maj mam siv nyob rau hauv kev kho mob ntawm organic pollutant dej khib nyiab xws li ether, phenol thiab dyes.
Rau cov organic chlorine, phosphorus, sulfur thiab lwm yam khoom siv tshuaj khib nyiab, papermaking thiab luam ntawv cov dej khib nyiab uas nyuaj rau kev kho nrog cov txheej txheem lom neeg, cov txiaj ntsig zoo tuaj yeem tau txais los ntawm kev kho electrochemical.
Cov ntsiab cai ntawm electrochemical wastewater kho
Raws li txoj cai, tag nrho cov organic teeb meem hauv cov kua dej tuaj yeem raug hluav taws xob oxidized ua ntej cov tshuaj tiv thaiv oxygen evolution, tab sis vim yog vim li cas kinetic, qhov ceev qeeb heev, thiab ncaj qha oxidation rau CO2 yog qhov nyuaj dua.
Qhov yooj yim ntawm electrochemical oxidation ntawm cov organic tshuaj tuaj yeem raug soj ntsuam los ntawm qhov hu ua electrochemical oxidizability index (EOI). Qhov loj dua tus nqi, qhov yooj yim dua nws yog oxidize. EOI tseem qhia txog qhov nruab nrab tam sim no kev ua tau zoo uas tuaj yeem ua tiav thaum electrolysis. Lwm qhov kev ntsuas ntsuas yog electrochemical oxygen noj (EOD), uas yog hais txog tus nqi hluav taws xob uas yuav tsum tau siv rau electrochemically oxidize txhua gram ntawm cov organic teeb meem sib npaug rau cov grams ntawm cov pa uas ua thaum electrolysis. EOD tuaj yeem xam los ntawm cov qauv hauv qab no
EOD=Wo2/Worg=(It/4F) (EOI) (32/Worg)(10-1)
Nyob rau hauv cov mis, kuv, t - electrolysis tam sim no thiab electrolysis lub sij hawm (tam sim no, lub instantaneous efficiency poob mus rau xoom);
Worg - qhov hnyav ntawm cov organic teeb meem hloov dua siab tshiab;
F--Faraday qhov tsis tu ncua.
Electrochemical wastewater kho yuav muab faib ua ob pawg: ncaj electrolysis thiab indirect electrolysis.