Industrial Wastewater Treatment: Cov txheej txheem thiab kev cia siab

Cov dej num hauv kev lag luam tsim cov dej khib nyiab loj uas muaj ntau hom pa phem. Tsis kho, cov dej khib nyiab no ua rau muaj kev phom sij rau ib puag ncig, kev noj qab haus huv pej xeem, thiab cov peev txheej dej. Yog li, kev kho mob zoo yog qhov tseem ceeb. Kab lus no qhia txog cov kev kho mob tam sim no thiab cov kev cia siab yav tom ntej.

Txoj kev kho uas twb muaj lawm

Kev kho lub cev

 

• Kev tso siab: Ib txoj hauv kev yooj yim, nws siv lub ntiajteb txawj nqus los ua kom hnyav dua cov khib nyiab hauv cov dej khib nyiab mus rau hauv qab ntawm lub tank. Piv txwv li, hauv cov dej khib nyiab, cov pob zeb loj thiab cov xuab zeb tuaj yeem raug tshem tawm li no. Ntxiv coagulants tuaj yeem ua kom cov txheej txheem los ntawm kev sib sau cov khoom zoo.
• pom: Lim nrog ntau qhov pore loj cais cov khoom uas raug tshem tawm. Xuab zeb lim yog feem ntau rau pretreatment, tshem tawm cov khib nyiab loj. Advanced membrane filtration zoo li microfiltration (tshem tawm 0.1 - 10 micrometer hais), ultrafiltration (capturing me me particles and macromolecules), thiab nanofiltration (separating me molecules and divalent ions) muab siab dua - theem purification.
• Kev Centrifugation: Txoj kev no siv lub zog centrifugal los cais cov khoom los ntawm qhov ceev. Hauv kev lag luam zaub mov thiab dej haus, nws cais cov khoom ntawm cov khoom pov tseg, xws li pulp thiab cov noob los ntawm cov kua txiv hmab txiv ntoo.

Tshuaj kho mob

 

• Qhov Tsis Muaj: Cov dej khib nyiab feem ntau muaj pH siab heev. Cov tshuaj alkaline xws li txiv qaub lossis sodium hydroxide tau ntxiv rau cov dej khib nyiab, raws li pom hauv cov hlau - plating industries. Cov tshuaj tiv thaiv kho pH thiab precipitates ib co hnyav hlau ions.
• Oxidation - Txo cov tshuaj tiv thaiv: Cov tshuaj oxidizing xws li ozone, hydrogen peroxide, thiab chlorine rhuav tshem cov pa phem. Ozone, muaj zog oxidizer, tuaj yeem decompose complex organics hauv cov dej khib nyiab. Kev txo qis, xws li siv ferrous sulfate los txo hexavalent chromium, kuj tseem ceeb heev.
• Tshuaj los nag: Ntxiv cov tshuaj precipitants tsim cov tshuaj insoluble nrog cov pa phem. Rau cov dej khib nyiab nrog cov hlau hnyav ( lead, cadmium, mercury), cov khoom siv xws li sodium sulfide lossis calcium hydroxide. Tom qab ntawd cov hlau sulfides lossis hydroxides insoluble tau raug cais tawm.

 

 

 

 

Kev kho mob lom

• Cov txheej txheem activated sludge: Ib txoj hauv kev zoo tshaj plaws, nws sib tov dej khib nyiab nrog cov kab mob (activated sludge) hauv lub tank aeration. Cov kab mob microorganisms rhuav tshem cov pa phem organic los ntawm kev ua pa aerobic. Oxygen tau muab, thiab cov dej khib nyiab kho tau mus rau lub tank sedimentation. Cov activated sludge tuaj yeem rov ua dua. Cov txheej txheem no yog siv dav hauv zaub mov, textile, thiab ntawv - ua kev lag luam.
• Txheej Txheem Txheej Txheem Txheej Txheem: Cov kab mob kis mus rau ib qho khoom nruab nrab los ua ib qho biofilm. Raws li cov dej khib nyiab ntws hla nws, biofilm decomposes pollutants. Biofilters, rau cov dej khib nyiab uas tsis tshua muaj zog, thiab txav mus los - txaj biofilm reactors, uas tuaj yeem tswj tau siab dua - cov dej khib nyiab, yog cov piv txwv.

Yav tom ntej zeem muag

Kev Tsim Kho thev Naus Laus Zis

•  Advanced Oxidation Processes (AOPs): AOPs zoo li photocatalytic oxidation, sonochemical oxidation, thiab Fenton - zoo li cov txheej txheem tsim cov reactive dawb radicals kom degrade tsis tu ncua organic pollutants. Photocatalytic oxidation siv cov ntaub ntawv semiconductor nyob rau hauv UV lub teeb los tsim hydroxyl radicals, muab ib tug ntau npaum thiab eco-phooj ywg lwm txoj rau ib txwm oxidation.
•  Nanotechnology - raws li kev kho mob: Nanomaterials, xws li activated carbon nanotubes thiab zeolite nanocomposites, nrog siab nto - cheeb tsam - rau - ntim ratios, qhia muaj peev xwm nyob rau hauv adsorbing pa phem. Nanoparticles kuj tseem tuaj yeem ua raws li cov catalysts. Txawm hais tias tseem nyob rau theem pib, nanotechnology tuav cov lus cog tseg zoo rau kev kho mob zoo dua.

Kev Tshawb Fawb Txog Kev Lag Luam thiab Kev Lag Luam Kev Lag Luam

• Rov qab cov khoom muaj txiaj ntsig zoo: Cov dej khib nyiab feem ntau muaj cov hlau muaj txiaj ntsig. Cov thev naus laus zis tshiab xws li kev tshem tawm cov kuab tshuaj, ion - pauv resins, thiab daim nyias nyias - raws li kev sib cais yog tsim los kom rov qab tau cov hlau no. Piv txwv li, hauv kev lag luam hluav taws xob, cov hlau muaj txiaj ntsig tuaj yeem xaiv tau los ntawm cov dej khib nyiab.
• Rov qab siv cov dej khib nyiab kho: Rov siv cov dej khib nyiab rov qab rau cov hom phiaj tsis muaj peev xwm xws li kev ua kom txias thiab dej yog qhov tseem ceeb rau kev tswj dej kom ruaj khov. Kev kho cov thev naus laus zis yog xav tau los xyuas kom meej cov dej zoo rau cov ntawv thov rov siv dua.

Kev tswj hwm thiab txoj cai - tsav kev loj hlob

• Kev cai nruj ib puag ncig: Tsoom fwv thoob ntiaj teb tab tom siv cov kev cai nruj dua rau kev tso dej pov tseg. Piv txwv li, European Union's Water Framework Directive tau teeb tsa kev txwv tsis pub muaj kuab paug, yuam kev lag luam los txhim kho cov chaw kho mob.
• Incentives rau Sustainable Practices: Tsoom fwv muab kev txhawb siab zoo li kev so se thiab kev pab nyiaj rau kev txhim kho cov cuab yeej kho mob siab heev thiab siv cov peev txheej - rov ua haujlwm, txhawb nqa ntau dua eco - tus phooj ywg thiab nqi - kev daws teeb meem zoo.

Hauv kev xaus, txoj kev kho tam sim no tau ua haujlwm tau zoo, tab sis nrog rau qhov nyuaj ntawm cov dej khib nyiab thiab kev xav tau kev tswj xyuas dej kom ruaj khov, yuav tsum muaj kev hloov tshiab tas li. Lub neej yav tom ntej ntawm kev kho dej khib nyiab yog nyob rau hauv cov thev naus laus zis siab, cov peev txheej rov qab, thiab kev tswj hwm kev tswj hwm, uas yuav pab tiv thaiv ib puag ncig thiab txhawb kev lag luam ncig.