Textile wastewater yog cov dej khib nyiab uas muaj cov khoom tsis zoo, cov rog, cov hmoov txhuv nplej siab thiab lwm yam khoom siv organic tsim thaum lub sij hawm ua cov khoom siv raw, yaug, tshuaj dawb, sizing, thiab lwm yam. sizing, thiab lwm yam, thiab muaj ib tug loj npaum li cas ntawm cov organic tshuaj xws li dyes, starch, cellulose, lignin, detergents, raws li zoo raws li inorganic tshuaj xws li alkali, sulfide, thiab ntau yam ntsev, uas yog heev polluting.
Cov yam ntxwv ntawm kev luam ntawv thiab dyeing dej khib nyiab
Kev lag luam textile printing thiab dyeing kev lag luam yog ib tug loj discharger ntawm industrial khib nyiab. Cov dej khib nyiab feem ntau muaj cov av, roj, ntsev ntawm textile fibers, thiab ntau yam slurries, dyes, surfactants, additives, acids thiab alkalis ntxiv thaum lub sij hawm ua cov txheej txheem.
Cov yam ntxwv ntawm cov dej khib nyiab yog cov organic concentration siab, complex muaj pes tsawg leeg, sib sib zog nqus thiab sib txawv chromaticity, loj pH hloov, loj hloov nyob rau hauv dej ntim thiab dej zoo, thiab nws yog ib qho nyuaj rau kho cov dej khib nyiab. Nrog rau txoj kev loj hlob ntawm cov tshuaj fiber ntau fabrics, qhov nce ntawm imitation txhob lo lo ntxhuav thiab kev txhim kho tom qab luam ntawv thiab dyeing xov tag, ib tug loj npaum li cas ntawm refractory organic teeb meem xws li PVA slurry, rayon alkaline hydrolyzate, tshiab dyes, thiab auxiliaries tau nkag mus rau hauv textile. luam ntawv thiab dyeing dej khib nyiab, ua rau muaj teeb meem loj rau cov txheej txheem kev kho dej khib nyiab. COD concentration kuj tau nce los ntawm ntau pua milligrams ib liter mus rau 3000-5000 mg / l.
Cov slurry thiab dyeing cov dej khib nyiab muaj siab chroma thiab siab COD, tshwj xeeb tshaj yog cov luam ntawv thiab dyeing txheej txheem xws li mercerized xiav, mercerized dub, ntxiv tsaus xiav, thiab ntxiv tsaus nti dub tsim raws li kev lag luam txawv teb chaws. Hom kev luam ntawv thiab dyeing no siv ntau cov sulfur dyes thiab luam ntawv thiab dyeing auxiliaries xws li sodium sulfide. Yog li ntawd, cov dej khib nyiab muaj ntau ntawm sulfide. Hom dej khib nyiab no yuav tsum tau kho ua ntej nrog cov tshuaj thiab tom qab ntawd raug rau kev kho serial kom ruaj khov raws li cov qauv tso tawm. Cov tshuaj dawb thiab dyeing cov dej khib nyiab muaj cov dyes, slurries, surfactants thiab lwm yam auxiliaries. Tus nqi ntawm hom dej khib nyiab no loj, thiab qhov concentration thiab chromaticity yog ob qho tib si tsawg. Yog tias kev kho lub cev thiab tshuaj siv ib leeg, cov dej ntws tawm kuj tseem nyob nruab nrab ntawm 100 thiab 200 mg / l, thiab chromaticity tuaj yeem ua tau raws li qhov yuav tsum tau tso tawm, tab sis tus nqi ntawm cov pa phem tau nce ntau, tus nqi ntawm sludge kho yog siab, thiab nws yog yooj yim ua rau muaj kuab paug thib ob. Raws li qhov xwm txheej ntawm kev tiv thaiv ib puag ncig nruj, cov txheej txheem kho biochemical yuav tsum tau txiav txim siab tag nrho. Cov txheej txheem kho cov txheej txheem kho mob zoo li qub tuaj yeem ua tau raws li kev kho mob.
Txoj kev kho tshuaj
Txoj kev coagulation
Muaj cov txheej txheem sib xyaw sedimentation thiab cov txheej txheem sib xyaw flotation. Cov coagulants siv feem ntau yog txhuas ntsev los yog hlau ntsev. Ntawm lawv, qhov yooj yim aluminium chloride (PAC) tau zoo dua bridging adsorption kev ua tau zoo, thiab tus nqi ntawm ferrous sulfate yog qhov qis tshaj. Tus naj npawb ntawm cov neeg siv polymer coagulants txawv teb chaws yog nce, thiab muaj ib qho kev hloov ntawm inorganic coagulants, tab sis nyob rau hauv Tuam Tshoj, vim hais tias ntawm tus nqi, kev siv ntawm polymer coagulants tseem tsawg. Nws tau tshaj tawm tias tsis muaj zog anionic polymer coagulants muaj qhov dav tshaj plaws ntawm kev siv. Yog tias siv ua ke nrog txhuas sulfate, lawv tuaj yeem ua tau zoo dua. Cov txiaj ntsig tseem ceeb ntawm cov txheej txheem sib xyaw yog cov txheej txheem yooj yim ntws, kev ua haujlwm yooj yim thiab kev tswj hwm, cov cuab yeej siv qis qis, me me hneev taw, thiab kev ua haujlwm siab decolorization rau hydrophobic dyes; Qhov tsis zoo yog cov nqi khiav lag luam siab, ntau cov sludge thiab nyuaj rau lub cev qhuav dej, thiab kev kho mob tsis zoo ntawm hydrophilic dyes.
Txoj kev oxidation
Ozone oxidation txoj kev yog dav siv txawv teb chaws. Zima SV et al. summarized tus qauv lej ntawm ozone decolorization ntawm luam ntawv thiab dyeing dej khib nyiab. Cov kev tshawb fawb tau pom tias thaum lub ozone ntau npaum li cas yog 0.886gO3 / g dye, tus decolorization tus nqi ntawm lub teeb xim av dye dej khib nyiab mus txog 80%; txoj kev tshawb no kuj pom tau hais tias tus nqi ntawm ozone yuav tsum tau rau kev ua hauj lwm tas mus li yog siab tshaj qhov yuav tsum tau rau kev ua hauj lwm sib tshuam, thiab cov installation ntawm partitions nyob rau hauv lub reactor yuav txo tau tus nqi ntawm ozone los ntawm 16.7%. Yog li ntawd, thaum siv ozone oxidation decolorization, nws yog ib qho tsim nyog los tsim ib qho kev sib tshuam reactor thiab xav txog kev txhim kho cov partitions hauv nws. Ozone oxidation txoj kev tuaj yeem ua tiav cov nyhuv decolorization zoo rau feem ntau cov dyes, tab sis cov nyhuv decolorization tsis zoo rau cov dej-insoluble dyes xws li sulfide, txo, thiab coatings. Kev txiav txim siab los ntawm kev ua haujlwm thiab cov txiaj ntsig hauv tsev thiab txawv teb chaws, txoj kev no muaj cov txiaj ntsig zoo decolorization, tab sis nws siv hluav taws xob ntau, thiab nws nyuaj rau kev txhawb nqa thiab siv rau ntawm qhov loj. Cov txheej txheem photooxidation muaj kev ua haujlwm siab decolorization rau kev kho cov luam ntawv thiab dyeing cov dej khib nyiab, tab sis cov cuab yeej siv peev thiab kev siv hluav taws xob yuav tsum tau txo qis ntxiv.
Txoj kev electrolysis
Electrolysis muaj txiaj ntsig zoo rau kev kho cov ntawv luam tawm thiab dyeing cov dej khib nyiab uas muaj cov kua qaub dyes, nrog rau decolorization tus nqi ntawm 50% mus rau 70%, tab sis kev kho cov dej khib nyiab nrog cov xim tsaus thiab siab CODcr tsis zoo. Cov kev tshawb fawb ntawm cov khoom siv hluav taws xob ntawm cov dyes qhia tau hais tias qhov kev txiav txim ntawm CODcr tshem tawm tus nqi ntawm ntau yam dyes thaum kho electrolytic yog: sulfur dyes, txo dyes> acid dyes, active dyes> nruab nrab dyes, direct dyes> cationic dyes, thiab txoj kev no yog nce. thiab siv.
Cov ntsuas dab tsi yuav tsum tau sim rau kev luam ntawv thiab dyeing dej khib nyiab
1. COD nrhiav pom
COD yog cov ntawv luv ntawm cov tshuaj oxygen xav tau hauv kev luam ntawv thiab dyeing cov dej khib nyiab, uas qhia txog cov tshuaj oxygen xav tau rau oxidation thiab decomposition ntawm cov organic thiab inorganic teeb meem hauv cov dej khib nyiab. Kev kuaj COD tuaj yeem cuam tshuam cov ntsiab lus ntawm cov organic teeb meem hauv cov dej khib nyiab, uas yog qhov tseem ceeb rau kev kuaj xyuas cov ntsiab lus ntawm cov organic teeb meem hauv kev luam ntawv thiab dyeing dej khib nyiab.
2. BOD nrhiav pom
BOD yog lub ntsiab lus ntawm biochemical oxygen xav tau, uas qhia txog cov pa oxygen xav tau thaum cov organic teeb meem hauv cov dej khib nyiab decomposed los ntawm cov kab mob. Kev kuaj BOD tuaj yeem cuam tshuam cov ntsiab lus ntawm cov organic teeb meem hauv kev luam ntawv thiab dyeing cov dej khib nyiab uas tuaj yeem degraded los ntawm cov kab mob, thiab ua kom pom tseeb cov ntsiab lus ntawm cov organic teeb meem hauv cov dej khib nyiab.
3. Chroma nrhiav pom
Cov xim ntawm kev luam ntawv thiab dyeing cov dej khib nyiab muaj qee yam stimulation rau tib neeg lub qhov muag. Kev kuaj pom chroma tuaj yeem cuam tshuam txog qib chroma hauv cov dej khib nyiab thiab muaj qee lub hom phiaj piav qhia txog qib ntawm cov pa phem hauv kev luam ntawv thiab dyeing dej khib nyiab.
4. pH tus nqi ntsuas
pH tus nqi yog ib qho tseem ceeb qhia txog cov acidity thiab alkalinity ntawm cov dej khib nyiab. Rau kev kho mob lom, tus nqi pH muaj kev cuam tshuam ntau dua. Feem ntau hais lus, tus nqi pH yuav tsum tau tswj ntawm 6.5-8.5. Siab dhau lossis qis dhau yuav cuam tshuam rau kev loj hlob thiab kev ua haujlwm metabolic ntawm cov kab mob.
5. Ammonia nitrogen nrhiav tau
Ammonia nitrogen yog ib qho taw qhia hauv kev luam ntawv thiab dyeing dej khib nyiab, thiab nws kuj yog ib qho tseem ceeb ntawm cov organic nitrogen ntsuas. Nws yog cov khoom ntawm decomposition ntawm cov organic nitrogen thiab inorganic nitrogen rau hauv ammonia hauv luam ntawv thiab dyeing dej khib nyiab. Cov ammonia nitrogen ntau dhau yuav ua rau cov khoom sib xyaw ntawm nitrogen hauv dej, uas yooj yim ua rau eutrophication ntawm lub cev dej.
6. Tag nrho cov phosphorus nrhiav tau
Tag nrho phosphorus yog ib qho tseem ceeb ntawm cov ntsev ntsev hauv luam ntawv thiab dyeing dej khib nyiab. Tag nrho cov phosphorus ntau dhau yuav ua rau eutrophication ntawm lub cev dej thiab cuam tshuam rau kev noj qab haus huv ntawm cov dej. Tag nrho cov phosphorus hauv kev luam ntawv thiab dyeing cov dej khib nyiab feem ntau yog los ntawm dyes, auxiliaries thiab lwm yam tshuaj uas siv rau hauv cov txheej txheem luam ntawv thiab dyeing.
Hauv cov ntsiab lus, cov ntsuas ntsuas ntawm kev luam ntawv thiab dyeing cov dej khib nyiab tsuas yog npog COD, BOD, chromaticity, pH tus nqi, ammonia nitrogen, tag nrho phosphorus thiab lwm yam. Tsuas yog los ntawm kev ntsuam xyuas cov ntsuas no thiab kho lawv kom zoo tuaj yeem tswj tau cov pa phem ntawm kev luam ntawv thiab dyeing cov dej khib nyiab zoo.
Lianhua yog lub chaw tsim khoom nrog 40 xyoo ntawm kev tsim cov khoom siv ntsuas dej zoo. Nws tshwj xeeb hauv kev muab chav kuajCOD, ammonia nitrogen, tag nrho phosphorus, tag nrho nitrogen,BOD, hnyav hlau, inorganic tshuaj thiab lwm yam kev ntsuas ntsuas. Cov cuab yeej tuaj yeem tsim cov txiaj ntsig sai, yooj yim rau kev khiav lag luam, thiab muaj cov txiaj ntsig raug. Lawv tau siv dav hauv ntau lub tuam txhab nrog kev tso dej pov tseg.
Post lub sij hawm: Oct-24-2024
