Cov txheej txheem ntawm Kev Siv Tshuaj Kho Dej Siv Tshuaj
May 18, 2022
Cov txheej txheem kev kho mob ntawm cov dej khib nyiab tuaj yeem muab faib ua pawg hauv qab no: kev kho mob physicochemical, kev kho tshuaj lom neeg, kev kho biochemical thiab kev kho ua ke ntawm ntau txoj kev, thiab lwm yam. Txhua txoj kev kho mob muaj nws qhov zoo thiab qhov tsis zoo.
Kev kho lub cev thiab tshuaj
Raws li cov yam ntxwv dej zoo ntawm cov dej phwj tuaj, kev kho physicochemical yuav tsum tau siv los ua cov txheej txheem ua ntej lossis tom qab kho cov txheej txheem biochemical hauv nws cov txheej txheem kho. Tam sim no siv physicochemical kev kho mob feem ntau suav nrog coagulation, huab cua flotation, adsorption, ammonia stripping, electrolysis, ionization pauv thiab membrane sib cais.
Coagulation
Cov thev naus laus zis no yog txoj kev kho dej zoo uas feem ntau siv hauv tsev thiab txawv teb chaws. Nws yog dav siv nyob rau hauv pretreatment thiab tom qab kho cov dej phwj tshuaj, xws li txhuas sulfate thiab polyferric sulfate, uas yog siv nyob rau hauv tsoos suav tshuaj dej phwj. Tus yuam sij rau kev kho coagulation kom zoo yog nyob rau hauv kev xaiv kom raug thiab noj cov coagulants nrog kev ua tau zoo. Nyob rau hauv xyoo tas los no, txoj kev loj hlob ntawm coagulants yog los ntawm qis-molecular mus rau polymeric macromolecules, thiab los ntawm ib hom kev tivthaiv muaj nuj nqi mus rau ib tug puas hom. Liu Minghua et al. tsim kom muaj kev ua tau zoo sib xyaw flocculant F-1 los kho cov dej phwj tuaj uas tsim los ntawm cov kab mob syrup. Thaum lub pH yog 6.5 thiab tus nqi ntawm flocculant yog 300 mg / L, qhov tshem tawm tus nqi ntawm COD, SS thiab chromaticity ntawm cov kua khib nyiab yog lawv mus txog 69.7 feem pua, 96.4 feem pua thiab 87.5 feem pua, raws li, thiab lawv cov kev ua tau zoo yog ho zoo dua. uas ntawm ib leeg flocculants xws li PAC (cov hmoov activated carbon) thiab polyacrylamide (PAM).
Huab cua Flotation
Huab cua flotation feem ntau suav nrog huab cua flotation, yaj huab cua flotation, tshuaj cua flotation thiab electrolytic cua flotation. Xinchang Pharmaceutical Factory siv CAF concave air flotation ntaus ntawv los ua kom cov dej phwj tuaj ua ntej. Qhov nruab nrab tshem tawm tus nqi yog nyob ib ncig ntawm 25 feem pua.
Txoj kev Adsorption
Feem ntau siv cov adsorbents yog activated carbon, activated thee, humic acids, adsorption resins, thiab lwm yam. Wuhan Jianmin Pharmaceutical Factory siv thee ash adsorption-ob-theem aerobic biological treatment txheej txheem los kho nws cov dej phwj tuaj. Cov txiaj ntsig tau pom tias COD tshem tawm tus nqi ntawm cov dej khib nyiab los ntawm adsorption pretreatment yog 41.1 feem pua, thiab tus nqi BOD5 / COD tau nce.
Kev sib cais ntawm Membrane
Membrane technologies suav nrog thim rov qab osmosis, nanofiltration daim nyias nyias thiab fiber ntau daim nyias nyias, uas tuaj yeem rov qab tau cov khoom muaj txiaj ntsig thiab txo tag nrho cov emission ntawm cov organic teeb meem. Cov yam ntxwv tseem ceeb ntawm cov thev naus laus zis no yog cov cuab yeej siv yooj yim, kev ua haujlwm yooj yim, tsis muaj theem hloov pauv thiab tshuaj lom neeg hloov pauv, kev ua haujlwm siab thiab txuag hluav taws xob. Zhuan et al. siv nanofiltration membranes cais cov tshuaj tua kab mob los ntawm cov dej phwj tuaj, thiab pom tias nws tsis tsuas yog txo cov nyhuv inhibitory ntawm cov tshuaj tua kab mob ntawm cov kab mob hauv cov dej phwj tuaj, tab sis kuj tau rov qab tshuaj tua kab mob.
Electrolysis
Txoj kev no muaj qhov zoo ntawm kev ua haujlwm siab thiab kev ua haujlwm yooj yim, thiab tau nyiam cov neeg nyiam. Nyob rau tib lub sijhawm, txoj kev electrolysis muaj cov nyhuv decolorization zoo. Lub riboflavin supernatant tau pretreated los ntawm electrolysis, thiab tshem tawm cov nqi ntawm COD, SS thiab chroma mus txog 71 feem pua, 83 feem pua thiab 67 feem pua.
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