1. Acid-Alkaline Cov dej khib nyiab
Cov yam ntxwv tseem ceeb:
Cov dej khib nyiab feem ntau yog los ntawm kev lag luam xws li cov nroj tsuag hlau, cov nroj tsuag tshuaj, tshuaj pleev xim, cov chaw electroplating, thiab cov mines. Nws muaj ntau yam teeb meem tshuaj los yog ntsev hlau hnyav, nrog rau qhov loj ntawm cov kua qaub sib txawv heev - nws tuaj yeem tsawg dua 1% lossis ntau dua 10%.
Alkaline khib nyiab tsuas yog los ntawm kev luam ntawv thiab dyeing mills, tanneries, ntawv mills, thiab roj refineries, muaj cov organic lossis inorganic alkalis. Cov ntsiab lus alkali nyob ntawm qis dua 1% mus rau ntau dua 5%.
Dhau li ntawm cov kua qaub thiab alkalis, hom dej khib nyiab no tseem muaj cov ntsev ntsev, cov ntsev yooj yim, thiab lwm yam tsis muaj kuab lom thiab cov organic ua paug, nthuav tawm muaj zog corrosiveness.
Txoj kev kho mob:
High-concentration acid-alkaline wastewater yuav tsum yog qhov tseem ceeb rau kev rov qab los thiab rov siv dua. Tsawg- cov dej khib nyiab tsis tshua muaj siab, xws li cov dej yaug los ntawm cov dej khib nyiab los yog cov alkali ntxuav tank, yuav tsum tau kho qhov nruab nrab. Lub hauv paus ntsiab lus ntawm "kev tswj cov khib nyiab pov tseg" yuav tsum tau siv ua ntej- piv txwv li, neutralizing acidic thiab alkaline khib nyiab rau ib leeg, lossis siv cov khib nyiab alkali (slag) los kho cov dej khib nyiab thiab cov kua qaub los kho cov dej khib nyiab alkaline. Yog tias tsis muaj cov kev xaiv zoo li no, cov neeg ua haujlwm nruab nrab yuav tsum tau siv.
2. Mineral ua dej khib nyiab
Cov yam ntxwv tseem ceeb:
Mineral processing dej khib nyiab yog tus cwj pwm los ntawm cov ntim loj thiab cov ntsiab lus siab tshem tawm cov khib nyiab. Nws muaj ntau cov hlau hnyav ions (xws li tooj liab, zinc, lead, npib tsib xee, barium, cadmium, arsenic) thiab cov txiaj ntsig zoo, ua rau muaj kev sib xyaw ua ke nrog ntau yam teeb meem.
Txoj kev kho mob:
Hnyav hlau ions tuaj yeem raug tshem tawm los ntawm kev siv cov kua qaub neutralization los yog ci dolomite adsorption. Rau flotation reagents, ore adsorption lossis activated carbon adsorption txoj kev tuaj yeem ua haujlwm. Cyanide- muaj cov dej khib nyiab yog tsim nyog rau kev kho mob los ntawm cov tshuaj oxidation.