Unyango lwamanzi amdaka: ukhetho phakathi kwe-polyaluminum chloride kunye ne-aluminium sulfate

Kwicandelo lonyango lwamanzi amdaka, zombini i-polyaluminum chloride (PAC) kunye ne-aluminium sulfate zisetyenziswa kakhulu njengeii-coagulantsKukho umahluko kwisakhiwo seekhemikhali zezi arhente zimbini, nto leyo ebangela ukusebenza kwazo kunye nokusetyenziswa kwazo. Kwiminyaka yakutshanje, i-PAC iye yathandwa kancinci kancinci ngenxa yokusebenza kwayo okuphezulu kunye nesantya sayo sonyango. Kweli nqaku, siza kuxoxa ngomahluko phakathi kwe-PAC kunye ne-aluminium sulfate kunyango lwamanzi amdaka ukuze sikuncede wenze ukhetho olunolwazi ngakumbi.

Okokuqala, makhe sifunde nge-polyaluminum chloride (PAC). Njenge-inorganic polymer coagulant, i-PAC inokunyibilika kakuhle kwaye inokwenza ii-flocs ngokukhawuleza. Idlala indima yokuxinana ngokuthomalalisa ngombane kunye nokubamba i-net, kwaye isetyenziswa kunye ne-flocculant PAM ukususa ngokufanelekileyo ukungcola emanzini amdaka. Xa kuthelekiswa ne-aluminium sulfate, i-PAC inamandla okucubungula kunye nomgangatho ongcono wamanzi emva kokucocwa. Okwangoku, iindleko zokucocwa kwamanzi ze-PAC ziphantsi nge-15%-30% kune-aluminium sulfate. Ngokuphathelele ukusebenzisa i-alkalinity emanzini, i-PAC isetyenziswa kancinci kwaye inokunciphisa okanye irhoxise ukufakwa kwe-alkaline agent.

Okulandelayo yi-aluminium sulfate. Njenge-coagulant yendabuko, i-aluminium sulfate ifunxa kwaye ijije ukungcola ngokusebenzisa ii-aluminium hydroxide colloids eziveliswa yi-hydrolysis. Izinga layo lokunyibilika alikho ngqiqweni, kodwa ifanelekile kunyango lwamanzi amdaka nge-pH eyi-6.0-7.5. Xa ithelekiswa ne-PAC, i-aluminium sulfate inomthamo ophantsi wonyango kunye nomgangatho wamanzi acocekileyo, kwaye iindleko zokucoca amanzi ziphezulu.

Ngokuphathelele ubukhulu bokusebenza, i-PAC kunye ne-aluminium sulfate zinezicelo ezahluke kancinci; i-PAC ngokubanzi kulula ukuyiphatha kwaye yenza ii-flocs ngokukhawuleza, nto leyo ephucula ukusebenza kakuhle konyango. I-aluminium sulfate, kwelinye icala, ayicothi i-hydrolyze kwaye ingathatha ixesha elide ukujiya.

I-aluminium sulfatekuya kunciphisa i-pH kunye nokuguquguquka kwamanzi acociweyo, ngoko ke i-soda okanye ilayimu ziyafuneka ukuze kuncitshiswe isiphumo. Isisombululo se-PAC siphantse sibe singathathi cala kwaye akukho mfuneko yaso nasiphi na isixhobo sokuthomalalisa (isoda okanye ilayimu).

Ngokuphathelele indawo yokugcina, i-PAC kunye ne-aluminium sulfate zihlala zizinzile kwaye kulula ukuzigcina nokuzithutha. Nangona i-PAC kufuneka ivalwe ukuze kuthintelwe ukufunxwa komswakama kunye nokuvezwa lilanga.

Ukongeza, ngokwembono yokubola, i-aluminium sulfate kulula ukuyisebenzisa kodwa ibolisa ngakumbi. Xa ukhetha izinto ezibolisa, impembelelo enokubakho kuzo zombini izixhobo zonyango kufuneka iqwalaselwe ngokupheleleyo.

Isishwankathelo,I-Polyaluminum Chloride(PAC) kunye ne-aluminium sulfate zinezibonelelo kunye neengxaki zazo ekunyangweni kwamanzi amdaka. Ngokubanzi, i-PAC kancinci kancinci iba yi-coagulant eqhelekileyo ngenxa yokusebenza kwayo okuphezulu, amandla okunyanga amanzi amdaka ngokukhawuleza kunye nokuguquguquka kwe-pH ebanzi. Nangona kunjalo, i-aluminium sulfate iseneenzuzo ezingenakutshintshwa phantsi kweemeko ezithile. Ke ngoko, xa ukhetha i-coagulant, izinto ezifana nemfuno yokwenyani, isiphumo sonyango kunye neendleko kufuneka ziqwalaselwe. Ukukhetha i-coagulant efanelekileyo kuya kunceda ukuphucula ukusebenza kakuhle konyango lwamanzi amdaka.