Poly Aluminium Chloride(PAC) yog ib yam tshuaj lom neeg uas siv dav hauv kev kho dej thiab dej khib vim nws muaj txiaj ntsig zoo hauv kev tshem tawm cov pa phem. Nws txoj kev ua haujlwm suav nrog ntau kauj ruam tseem ceeb uas pab txhawb rau kev ntxuav dej.
Ua ntej, PAC ua haujlwm ua cov coagulant hauv cov txheej txheem kho dej. Coagulation yog cov txheej txheem ntawm kev ua kom cov khoom me me thiab cov khoom ncua hauv dej tsis ruaj khov, ua rau lawv sib sau ua ke thiab tsim cov khoom loj dua hu ua flocs. PAC ua tiav qhov no los ntawm kev ua kom cov nqi tsis zoo ntawm qhov chaw ntawm cov khoom me me colloidal tsis sib haum, uas tso cai rau lawv los ua ke thiab tsim cov flocs los ntawm cov txheej txheem hu ua charge neutralization. Cov flocs no yooj yim dua rau kev tshem tawm los ntawm cov txheej txheem lim dej tom qab.
Kev tsim cov flocs yog qhov tseem ceeb rau kev tshem tawm ntau yam kev ua qias tuaj ntawm dej. PAC tshem tawm cov khoom khov uas raug tshem tawm, xws li cov av nplaum, cov xuab zeb, thiab cov organic matter, los ntawm kev muab tso rau hauv cov flocs. Cov khoom khov uas raug tshem tawm no tuaj yeem ua rau muaj qhov turbidity hauv dej, ua rau nws zoo li cloudy lossis virky. Los ntawm kev sib sau ua ke cov khoom me me no rau hauv cov flocs loj dua, PAC pab txhawb lawv txoj kev tshem tawm thaum lub sijhawm sedimentation thiab lim dej, ua rau dej ntshiab dua.
Tsis tas li ntawd xwb, PAC pab tshem tawm cov organic uas yaj thiab cov tshuaj ua rau muaj xim ntawm dej. Cov organic uas yaj, xws li humic thiab fulvic acids, tuaj yeem ua rau cov dej saj tsis zoo thiab tsw ntxhiab thiab tej zaum yuav ua rau cov tshuaj tua kab mob ua rau cov khoom siv tua kab mob tsis zoo. PAC pab ua kom cov organic sib xyaw ua ke thiab nqus tau rau ntawm qhov chaw ntawm cov flocs uas tsim, yog li txo lawv cov concentration hauv cov dej kho.
Ntxiv rau cov organic matter, PAC kuj tseem tuaj yeem tshem tawm ntau yam inorganic contaminations ntawm dej. Cov contaminations no yuav suav nrog cov hlau hnyav, xws li arsenic, lead, thiab chromium, nrog rau qee cov anions xws li phosphate thiab fluoride. PAC ua haujlwm los ntawm kev tsim cov hlau hydroxide uas tsis yaj lossis los ntawm kev nqus cov hlau ions rau ntawm nws qhov chaw, yog li txo lawv cov concentration hauv cov dej kho kom txog rau qib uas ua tau raws li cov qauv kev cai.
Ntxiv mus, PAC muaj qhov zoo dua li lwm cov tshuaj coagulants uas feem ntau siv rau hauv kev kho dej, xws li txhuas sulfate (alum). Tsis zoo li alum, PAC tsis hloov pauv pH ntawm dej thaum lub sijhawm coagulation, uas pab txo qhov xav tau cov tshuaj kho pH thiab txo cov nqi kho tag nrho. Tsis tas li ntawd, PAC tsim cov sludges tsawg dua piv rau alum, ua rau cov nqi pov tseg qis dua thiab kev cuam tshuam rau ib puag ncig.
Zuag qhia tag nrho, Poly Aluminium Chloride (PAC) yog cov tshuaj coagulant zoo heev uas ua lub luag haujlwm tseem ceeb hauv kev tshem tawm ntau yam kab mob ntawm dej. Nws lub peev xwm los txhawb kev coagulation, flocculation, sedimentation, thiab adsorption ua rau nws yog ib qho tseem ceeb hauv cov txheej txheem kho dej thoob ntiaj teb. Los ntawm kev pab txhawb kev tshem tawm cov khoom seem, cov organic matter yaj, cov xim ua rau muaj xim, thiab cov kab mob inorganic, PAC pab tsim cov dej haus huv, ntshiab, thiab muaj kev nyab xeeb uas ua tau raws li cov qauv kev cai. Nws cov nqi-zoo, yooj yim siv, thiab qhov cuam tshuam tsawg kawg nkaus rau pH dej ua rau nws yog qhov kev xaiv zoo rau cov chaw kho dej nrhiav kev daws teeb meem txhim khu kev qha thiab ruaj khov rau kev ntxuav dej.
Lub sijhawm tshaj tawm: Lub Peb Hlis-18-2024