Ukucwiliswa kwe-Flocculation - I-Aluminium sulphate vs I-Poly aluminium chloride

Ukugoqeka kwe-flocculation inqubo lapho izinhlayiya ezilengayo ezifakwe i-negative charge ezikhona ekumisweni okuzinzile emanzini zigoqeka khona. Lokhu kufezwa ngokufaka i-coagulant efakwe i-positive charge. I-positive charge ku-coagulant igoqeka i-negative charge ekhona emanzini (okungukuthi iyayigoqeka). Uma izinhlayiya sezigoqeka noma zigoqeka, inqubo yokugoqeka iyenzeka. Izinhlayiya ezigoqeka zihlangana zibe izinhlayiya ezinkulu nezinkulu kuze kube yilapho zisinda ngokwanele ukuthi zihlale ngokuthuthwa kwenhlabathi noma ezinkulu ngokwanele ukubamba amabhamuza omoya bese zintanta.

Namuhla sizobheka ngokujulile izakhiwo ze-flocculant ezimbili ezivamile: i-poly aluminium chloride kanye ne-aluminium sulfate.

I-Aluminium Sulfate: I-Aluminium Sulfate ine-asidi ngokwemvelo. Umgomo wokusebenza we-aluminium sulfate umi kanje: i-aluminium sulfate ikhiqiza i-aluminium hydroxide, i-Al(0H)3. Ama-aluminium hydroxides anobubanzi be-pH obulinganiselwe, ngaphezu kwalokho ngeke asebenzise i-hydrolysis noma i-hydrolyzated aluminium hydroxides ngokushesha ku-pH ephezulu (okungukuthi i-pH engaphezu kuka-8.5), ngakho-ke i-pH esebenzayo kumele ilawulwe ngokucophelela ukuze igcinwe kububanzi obungu-5.8-8.5. I-alkalinity emanzini kumele yanele ngesikhathi senqubo yokucwilisa ukuqinisekisa ukuthi i-hydroxide enganyibiliki yakheke ngokuphelele futhi ivuvukala. Isusa izinto zombala kanye ne-colloidal ngokuhlanganiswa kwe-adsorption kanye ne-hydrolysis ku-/ku-hydroxides yensimbi. Ngakho-ke, ifasitela le-pH lokusebenza le-aluminium sulfate lingu-5.8-8.5 kuphela, ngakho-ke kubaluleke kakhulu ukuqinisekisa ukulawula okuhle kwe-pH kuyo yonke inqubo lapho usebenzisa i-aluminium sulfate.

I-Polyaluminum chloride(PAC) ingenye yamakhemikhali okwelapha amanzi asebenza kahle kakhulu asetshenziswa namuhla. Isetshenziswa kabanzi ekuphuzeni nasekuphatheni amanzi angcolile ngenxa yokusebenza kwayo kahle kakhulu kokubopha kanye nobubanzi obukhulu be-pH kanye nokusetshenziswa kwezinga lokushisa uma kuqhathaniswa namanye amakhemikhali okwelapha amanzi. I-PAC itholakala ngamagremu amaningana ahlukene anamazinga e-alumina asukela ku-28% kuya ku-30%. Ukuhlushwa kwe-alumina akuyona yodwa into okufanele uyicabangele lapho ukhetha ukuthi yiliphi ibanga le-PAC ozolisebenzisa.

I-PAC ingabhekwa njenge-coagulant yangaphambi kwe-hydrolysis. Amaqoqo e-aluminium angaphambi kwe-hydrolysis ane-chaji ephezulu kakhulu, okwenza i-PAC ibe yi-cationic kakhulu kune-alum. Okwenza ibe yi-destabilizer enamandla yokungcola okulengayo okune-charge embi emanzini.

I-PAC inezinzuzo ezilandelayo kune-aluminium sulfate

1. Isebenza ngamanani aphansi kakhulu. Njengomthetho, umthamo we-PAC cishe uyingxenye eyodwa kwezintathu yomthamo odingekayo ku-alum.

2. Kushiya i-aluminium encane emanzini alungisiwe

3. Ikhiqiza udaka oluncane

4. Isebenza kububanzi be-pH

Kunezinhlobo eziningi zama-flocculant, futhi lesi sihloko sethula ezimbili kuphela zazo. Lapho ukhetha i-coagulant, kufanele ucabangele ikhwalithi yamanzi owaphathayo kanye nesabelomali sakho sezindleko. Ngithemba ukuthi unesipiliyoni esihle sokwelapha amanzi. Njengomhlinzeki wamakhemikhali okwelapha amanzi oneminyaka engu-28 yesipiliyoni. Ngiyajabula ukuxazulula zonke izinkinga zakho (mayelana namakhemikhali okwelapha amanzi).