Qhov pib txoj kev kho kom tau siv ntau yam kev txhais tau tias cais, tshem tawm thiab rov qab ua kom tsis muaj dej los ntxuav cov dej.
Muaj ntau txoj hauv kev los kho dej phwj tuaj, uas feem ntau tuaj yeem raug kho kom raug rau plaub pawg, kev kho mob ntawm lub cev, tshuaj lom neeg thiab kev kho mob ntuj.
1. Kev Kho Mob Txheeb Xyuas
Los ntawm cov metabolism ntawm cov microorganisms, organic pollutants nyob rau hauv daim ntawv ntawm cov kev daws teeb meem, kev ncua kev ncua ntawv hloov mus rau hauv cov khoom ruaj khov thiab kev tsis zoo. Raws li cov kab mob sib txawv, kev kho mob muaj kuab lom tuaj yeem faib ua ob hom: kev kho mob aerobic roj ntsha thiab kev kho mob anaerobic.
Lub aerobic roj ntsha ua tau siv dav hauv kev kho roj ntsha hauv cov khoom noj khoom haus roj ntsha roj biological ntawm wastewater. Raws li cov txheej txheem sib txawv, txoj kev kho mob berobic roj ntsha tau muab faib ua ob hom: Ua kom tiav sludge txoj kev thiab biofilm txoj kev. Ua kom cov txheej txheem sludge nws tus kheej yog chav kho mob, nws muaj ntau hom kev ua haujlwm. Cov cuab yeej kho ntawm biofilm cov qauv suav nrog biofilter, biological oxidation txaj tank thiab lwm yam biological oxidation pas dej kuj tseem hu ua kev kho mob muaj roj ntsha. Kev kho mob ntawm lub cev muaj roj ntsha, tseem hu ua kev kho roj ntsha, feem ntau yog siv los kho cov tshuaj organic ntau thiab sludge.
2. Kev Kho Mob Lub Cev
Cov hau kev sib cais thiab rov ua cov pa paug dawb paug (suav nrog roj yeeb yaj kiab thiab cov roj tov) hauv kev sib cais ua ke, centrifugal sib cais qauv thiab sab cib Kev Kawm Retication. Cov kev kho mob uas zwm rau txoj kev nqus sib txig sib cais nrog cov khoom siv kom haum, thiab cov khoom siv roj ua kom huv si, thiab cov khoom siv cua sov thiab lwm yam.; Centrifugal sib cais nws tus kheej yog hom kev kho mob, cov cuab yeej siv tau siv nrog cov khoom siv thiab hydrocychlone, thiab lwm yam; Qhov screen tuav txoj cai muaj ob txoj kev ua tiav: Daim phiaj screen tuav thiab pom kev. The former uses grids and screens, while the latter uses sand Filters and microporous filters, etc. The treatment method based on the principle of heat exchange is also a physical treatment method, and its treatment units include evaporation and crystallization.
3. Kev kho tshuaj lom neeg
Kev kho kom huv uas cais tawm thiab tshem tawm cov pa paug yaj thiab cov tshuaj tsw qab los ntawm cov tshuaj tsis zoo los ntawm cov tshuaj lom neeg los ntawm kev siv tshuaj lom neeg. Nyob rau hauv txoj kev kho tshuaj lom neeg siv tshuaj, kev ua cov chav ua haujlwm raws li cov tshuaj lom neeg ntawm kev txhaj tshuaj yog: coagulation, neutralization, redox, thiab lwm yam; Thaum cov chav ua haujlwm nyob ntawm huab hwm coj yog: Extraction, Stripping, ion pauv, kos duab Osmoslysis thiab rov qab raug xa mus ua cov tshuab sib cais ua ke. Ntawm lawv, chav kho cov kev kho mob loj hloov tau ob qho tshuaj lom neeg thiab ua lwm yam kev kho mob lub cev, yog li nws tseem tuaj yeem ua lwm hom kev kho mob, hu ua kev kho mob lub cev.
daim duab
Cov Khoom Siv Dej Phom Nyom Nyom
1. Degreasing Wastewater
Cov ntsuas muaj kuab paug xws li cov roj av cov ntsiab lus, codcr thiab bod5 nyob rau hauv kev pov tseg cov kua yog heev. Txoj kev kho mob suav nrog acid extraction, centrifugation lossis cov kuab tshuaj extraction. Cov txheej txheem kua qaub yog siv dav siv, ntxiv H2so4 los kho cov ntsev, thiab nplawm thiab cov roj maj mam ya mus rau cov roj txheej. Qhov rov qab ntawm cov roj muaj peev xwm ncav cuag 96%, thiab tshem tawm cov cim codcr yog ntau dua li 92%. Feem ntau, cov roj ntau puag ntawm cov roj hauv dej inlet yog 8-10G / l, thiab cov roj ntau convanced ntawm cov roj hauv qhov hluav taws xob tsawg dua 0.1 g / l. Cov roj zoo dua yog cov txheej txheem ntxiv thiab hloov pauv mus ua cov fatty acids uas tuaj yeem siv los ntxuav tes.
2. Liming thiab plaub hau tshem tawm dej khib nyiab
Liming thiab plaub hau tshem dej muaj protein, kua qaub, tshem tawm cov khib nyiab, 92% ntawm tag nrho cov s2-, thiab 75% ntawm tag nrho cov SS. Txoj kev kho mob muaj cov acidification, tshuaj nag los nag thiab oxidation.
Cov txheej txheem acidification feem ntau siv hauv kev tsim khoom. Nyob rau hauv cov xwm txheej ntawm kev ua tsis zoo, ntxiv h2s4 los kho tus nqi hauv rau 4-4.5, Tsim kom muaj cov tshuaj naoh, thiab tsim kom muaj sulfurized alkali rau rov siv dua. Cov soluble protein precipitated nyob rau hauv lub pov tseg yog lim, ntxuav, thiab qhuav. ua ib yam khoom. Tus nqi tshem tawm sulfide tuaj yeem ncav cuag ntau dua 90%, thiab cov cim codcr thiab SS yog txo los ntawm 85% thiab 95% feem. Nws cov nqi qis, kev ua haujlwm ntau lawm, yooj yim los tswj, thiab kev tsim khoom yog luv. Luv.
3. Chrome Termiing Wastewater
Cov pa dej siab loj ntawm chrome tanning quav dev yog hnyav hlau CR3 +, qhov loj heev yog li 3-4G / u, thiab pH tus nqi yog li tsis muaj zog acidic. Txoj kev kho mob muaj xws li alkali daus thiab kev ua haujlwm ncaj qha. 90% ntawm cov tanneries siv alkali daus nag lossis siv cov roj ntsha, siv cov roj ntsha, thiab cov roj ntsha Cov.
Thaum lub sij hawm cov tshuaj tiv thaiv, tus nqi pH yog 8.2-8.5, thiab nag lossis daus zoo tshaj plaws ntawm 40 ° C. Lub alkali precipitant yog magnesium oxide, cov chromium rov qab cov tshuaj chromium hauv effluent yog tsawg dua 1 mg / l. Txawm li cas los xij, hom no yog qhov tsim nyog rau cov tannneries loj, thiab impurities xws li cov roj soluble thiab protein hauv kev rov ua haujlwm Chrome av yuav cuam tshuam rau cov nyhuv chrome.
4. Cov dej khib nyiab
4.1. Pretreatment System: Nws tsuas yog suav nrog cov chaw kho mob xws li Grille, tswj lub tank tswj, tenimentation tank thiab cua flotation tank. Cov concentration ntawm cov organic teeb meem thiab cov khib nyiab hauv tannery wastewater yog siab. Lub pretreplectment system yog siv los kho cov dej ntim thiab dej kom zoo; Tshem cov SS thiab cov khib nyiab; Txo qhov tshuaj tiv thaiv cov kuab paug hauv kev ua kom zoo thiab tsim cov kev mob zoo rau kev kho muaj roj ntsha tom ntej.
4.2. Kev Kho Mob Biological: ρ (Codcr) ntawm Tannery Wastewater yog feem ntau 3000mg / L, I CE (BOD5) / M (Codcr) tus nqi Nws yog 0.3-0.6, uas haum rau kev kho mob biological. Nyob rau tam sim no, oxidation ditch, sbr thiab lom neeg sib chwv muaj ntau dua nyob rau hauv Suav teb, thaum lub txaj me me hauv Suav teb, thaum lub txaj biofil), lub txaj bifabm thiab upflow anaerobic sludge txaj (uasb).
Lub Sijhawm Post: Jan-17-2023
