Ukucocwa kwamanzi amdaka: ukhetho phakathi kwe-polyaluminium chloride kunye ne-aluminium sulfate

Kwintsimi yokucocwa kwamanzi amdaka, zombini i-polyaluminium chloride (PAC) kunye ne-aluminium sulfate zisetyenziswa ngokubanzi njengeiicoagulants. Kukho iiyantlukwano kulwakhiwo lweekhemikhali zezi arhente zimbini, okukhokelela ekusebenzeni kwazo kunye nokusetyenziswa kwazo. Kwiminyaka yakutsha nje, iPAC iye yathandwa ngokuthe chu ngokusebenza kwayo kunyango oluphezulu kunye nesantya. Kweli nqaku, siza kuxoxa ngomahluko phakathi kwePAC kunye ne-aluminium sulfate kunyango lwamanzi amdaka ukukunceda wenze ukhetho olunolwazi ngakumbi.

Okokuqala, makhe sifunde ngepolyaluminium chloride (PAC). Njenge-inorganic polymer coagulant, iPAC inokunyibilika okugqwesileyo kwaye inokukhawuleza ukwenza iiflocs. Idlala indima ye-coagulation ngokusebenzisa ukungathathi hlangothi kombane kunye nokubanjwa komnatha, kwaye isetyenziswe ngokubambisana ne-flocculant PAM ukususa ngokufanelekileyo ukungcola kumanzi amdaka. Xa kuthelekiswa ne-aluminiyam sulfate, iPAC inamandla okusebenza kunye nomgangatho ongcono wamanzi emva kokucocwa. Okwangoku, iindleko zokucocwa kwamanzi kwePAC yi-15% -30% ngaphantsi kune-aluminium sulfate. Ngokubhekiselele kukutya kwe-alkalinity emanzini, iPAC inosetyenziso oluphantsi kwaye inokunciphisa okanye irhoxise inaliti ye-alkaline.

Okulandelayo yi-aluminium sulfate. Njenge-coagulant yendabuko, i-aluminium sulfate i-adsorbs kwaye idibanisa ukungcola ngokusebenzisa i-aluminium hydroxide colloids eveliswa yi-hydrolysis. Izinga layo lokunyibilika lincinci, kodwa lifanelekile ukunyanga amanzi amdaka kunye ne-pH ye-6.0-7.5. Xa kuthelekiswa nePAC, i-aluminium sulfate inomthamo ophantsi wonyango kunye nomgangatho wamanzi ocociweyo, kwaye ixabiso lokucocwa kwamanzi liphezulu.

Ngokwemilinganiselo yokusebenza, iPAC kunye ne-aluminiyam sulfate zinezicelo ezahlukileyo kancinci; I-PAC ngokuqhelekileyo kulula ukuyiphatha kwaye yenza i-flocs ngokukhawuleza, ephucula unyango olusebenzayo. I-aluminiyam sulfate, kwelinye icala, iyacotha kwi-hydrolyze kwaye inokuthatha ixesha elide ukujiya.

I-aluminium sulfateiya kunciphisa i-pH kunye ne-alkanility yamanzi acociweyo, ngoko ke i-soda okanye i-lime iyafuneka ukuze unciphise umphumo. Isisombululo sePAC sikufutshane nokungathathi hlangothi kwaye akukho mfuneko kuyo nayiphi na i-agent engathathi hlangothi (i-soda okanye i-lime).

Ngokumalunga nokugcinwa, i-PAC kunye ne-aluminium sulfate zihlala zizinzile kwaye kulula ukuzigcina kunye nokuthutha. Ngelixa iPAC kufuneka itywinwe ukuthintela ukufunxa ukufuma kunye nokuchanabeka elangeni.

Ukongeza, ukusuka kwindawo yokujonga ukubola, i-aluminium sulfate kulula ukuyisebenzisa kodwa iyingozi ngakumbi. Xa ukhetha i-coagulants, impembelelo enokubakho kuzo zombini kwizixhobo zonyango kufuneka ziqwalaselwe ngokupheleleyo.

Isishwankathelo,I-Polyaluminium chloride(PAC) kunye ne-aluminiyam sulfate zineenzuzo zazo kunye nezingeloncedo kunyango lwelindle. Lilonke, iPAC ngokuthe ngcembe isiba yeyona nto icoagulant ngenxa yokusebenza kwayo okuphezulu, isakhono sokucocwa kwamanzi amdaka ngokukhawuleza kunye nokuguquguquka kwe-pH ebanzi. Nangona kunjalo, i-aluminiyam sulfate iseneenzuzo ezingenakubuyiselwa phantsi kweemeko ezithile. Ngoko ke, xa ukhetha i-coagulant, izinto ezifana nemfuno yangempela, umphumo wonyango kunye neendleko kufuneka ziqwalaselwe. Ukukhetha i-coagulant efanelekileyo kuya kunceda ukuphucula ukusebenza kakuhle kokunyanga kwamanzi amdaka.