Kuchiza kwamadzi onyansa: kusankha pakati pa polyaluminium chloride ndi aluminium sulphate

M'munda wamankhwala amadzi onyansa, onse polyaluminium chloride (PAC) ndi aluminium sulphate amagwiritsidwa ntchito kwambiri ngaticoagulants. Pali kusiyana kwa kapangidwe ka mankhwala a othandizira awiriwa, zomwe zimapangitsa kuti azigwira ntchito komanso kugwiritsa ntchito kwawo. M'zaka zaposachedwa, PAC yakondedwa pang'onopang'ono chifukwa chakuchita bwino kwamankhwala komanso kuthamanga. M'nkhaniyi, tikambirana za kusiyana pakati pa PAC ndi aluminiyamu sulphate pamankhwala amadzi onyansa kuti zikuthandizeni kusankha mwanzeru.

Choyamba, tiyeni tiphunzire za polyaluminium chloride (PAC). Monga inorganic polymer coagulant, PAC imakhala ndi kusungunuka kwabwino kwambiri ndipo imatha kupanga ma flocs mwachangu. Imagwira ntchito yolumikizirana kudzera mu kusalowerera kwa magetsi komanso kukokera maukonde, ndipo imagwiritsidwa ntchito molumikizana ndi flocculant PAM kuti ichotse bwino zonyansa m'madzi oyipa. Poyerekeza ndi aluminiyamu sulphate, PAC ili ndi mphamvu zogwirira ntchito komanso madzi abwinoko akayeretsedwa. Panthawiyi, mtengo woyeretsa madzi wa PAC ndi 15% -30% wotsika kuposa aluminium sulphate. Pankhani ya kumwa zamchere m'madzi, PAC imakhala yochepa kwambiri ndipo imatha kuchepetsa kapena kuletsa jekeseni wa alkaline.

Chotsatira ndi aluminium sulphate. Monga coagulant yachikhalidwe, aluminiyamu sulphate amadsorbs ndi coagulates zoipitsa kudzera aluminium hydroxide colloids opangidwa ndi hydrolysis. Kusungunuka kwake kumakhala kocheperako, koma ndikoyenera kuyeretsa madzi otayika ndi pH ya 6.0-7.5. Poyerekeza ndi PAC, aluminiyamu sulphate ali ndi mphamvu zochepa zochizira komanso madzi oyeretsedwa, ndipo mtengo woyeretsa madzi ndi wokwera kwambiri.

Ponena za kukula kwa ntchito, PAC ndi aluminiyamu sulphate ali ndi ntchito zosiyana pang'ono; PAC nthawi zambiri imakhala yosavuta kugwira ndipo imapanga ma flocs mwachangu, zomwe zimapangitsa kuti chithandizo chikhale bwino. Aluminiyamu sulphate, kumbali ina, imachedwa kusungunuka ndipo imatha kutenga nthawi yayitali kuti iundane.

Aluminium sulphateidzachepetsa pH ndi alkanility ya madzi oyeretsedwa, kotero soda kapena laimu amafunika kuti athetse vutoli. Yankho la PAC lili pafupi ndi kusalowerera ndale ndipo palibe chofunikira kwa wothandizira aliyense wosalowerera (soda kapena laimu).

Pankhani yosungira, PAC ndi aluminium sulfate nthawi zambiri zimakhala zokhazikika komanso zosavuta kusunga ndi kunyamula. Pomwe PAC iyenera kusindikizidwa kuti isatengeke ndi chinyezi komanso kukhudzidwa ndi kuwala kwa dzuwa.

Kuphatikiza apo, pakuwona kwa corrosivity, aluminium sulphate ndi yosavuta kugwiritsa ntchito koma yowononga kwambiri. Posankha ma coagulants, zomwe zingachitike pazida zamankhwala ziyenera kuganiziridwa mokwanira.

Powombetsa mkota,Polyaluminium Chloride(PAC) ndi aluminiyamu sulphate ali ndi ubwino ndi kuipa kwawo pa zimbudzi. Ponseponse, PAC pang'onopang'ono ikukhala coagulant yodziwika bwino chifukwa chakuchita bwino kwambiri, kutha kwa madzi akuwonongeka mwachangu komanso kusinthasintha kwa pH. Komabe, aluminium sulphate akadali ndi zabwino zosasinthika nthawi zina. Choncho, posankha coagulant, zinthu monga kufunikira kwenikweni, zotsatira za mankhwala ndi mtengo wake ziyenera kuganiziridwa. Kusankha coagulant yoyenera kumathandizira kukonza magwiridwe antchito amadzi oyipa.