I-Flocculation - I-Aluminium sulphate vs i-Poly aluminium chloride

I-Flocculation inqubo lapho izinhlayiya ezimisiwe ezikhokhiswa kabi ezikhona ekumisweni okuzinzile emanzini zingasebenzi kahle. Lokhu kufezwa ngokungeza i-coagulant ene-positively charged. Ukushaja okuphozithivu ku-coagulant kwenza ukushajwa okunegethivu okukhona emanzini kungabi namandla (okungukuthi kuyawaqeda amandla). Uma izinhlayiya zingasebenzi kahle noma zingathathi hlangothi, inqubo ye-flocculation iyenzeka. Izinhlayiya ezingasebenzi kahle zihlangana zibe izinhlayiya ezinkulu nezikhudlwana kuze kube yilapho sezisinda ngokwanele ukuba zihlale ngokuthula noma zibe zikhulu ngokwanele ukubamba amabhamuza omoya futhi zintante.

Namuhla sizobheka ngokucophelela izakhiwo ze-flocculation ze-flocculants ezimbili ezivamile: i-poly aluminium chloride ne-aluminium sulfate.

I-aluminium sulfate: I-Aluminium Sulfate ine-acidic ngokwemvelo. Isimiso sokusebenza se-aluminium sulfate simi kanje: i-aluminium sulfate ikhiqiza i-aluminium hydroxide, i-Al(0H)3. I-Aluminium hydroxides inobubanzi obulinganiselwe be-pH, ngaphezu kwalokho ngeke isebenze kahle i-hydrolysis noma, i-hydrolyzated aluminium hydroxides ixazululwe ngokushesha ku-pH ephezulu (okungukuthi i-pH engaphezu kuka-8.5), ngakho-ke i-pH yokusebenza kufanele ilawulwe ngokucophelela ukuze igcinwe kububanzi obungu-5.8-8.5 . i-alkalinity emanzini kufanele ibe yanele ngesikhathi senqubo ye-flocculation ukuze kuqinisekiswe ukuthi i-hydroxide engenakuqhathaniswa yakhiwe ngokugcwele futhi iyancipha. Isusa izinto ezinemibala ne-colloidal ngenhlanganisela ye-adsorption kanye ne-hydrolysis ku-metal hydroxides. Ngakho-ke, iwindi le-pH elisebenzayo le-aluminium sulfate liqinile ku-5.8-8.5, ngakho-ke kubaluleke kakhulu ukuqinisekisa ukulawula okuhle kwe-pH kuyo yonke inqubo lapho usebenzisa i-aluminium sulfate.

I-Polyaluminium chloride(PAC) ingelinye lamakhemikhali okwelapha amanzi asebenza kahle kakhulu asetshenziswa namuhla. Isetshenziswa kakhulu ekwelashweni kwamanzi okuphuza kanye namanzi angcolile ngenxa yokusebenza kwayo okuphezulu kokuqina kanye nohlu olubanzi kakhulu lwe-pH nezisetshenziswa zokushisa uma kuqhathaniswa namanye amakhemikhali okuhlanza amanzi. I-PAC itholakala kumabanga amaningana ahlukene ngokugxila kwe-alumina kusuka ku-28% kuya ku-30%. Ukugxila kwe-Alumina akukhona kuphela okucatshangelwayo lapho ukhetha ukuthi yiliphi ibanga le-PAC ozolisebenzisa.

I-PAC ingathathwa njenge-pre-hydrolysis coagulant. Amaqoqo e-aluminiyamu angaphambi kwe-hydrolysis anomthamo wokushaja ophozithivu ophezulu kakhulu, okwenza i-PAC iqine kakhulu kune-alum.okuyenza ibe isiqeda amandla esinamandla sokungcola okulengisiwe okunecala elibi emanzini.

I-PAC inezinzuzo ezilandelayo kune-aluminium sulfate

1. Isebenza ezindaweni eziphansi kakhulu. Njengomthetho wesithupha, umthamo we-PAC cishe uyingxenye eyodwa kwezintathu yomthamo odingekayo ku-alum.

2. Ishiya i-aluminium encane eyinsalela emanzini ahlanzekile

3. Ikhiqiza udaka oluncane

4. Isebenza nge-pH ebanzi

Kunezinhlobo eziningi ze-flocculants, futhi lesi sihloko sethula ezimbili zazo kuphela. Lapho ukhetha i-coagulant, kufanele ucabangele izinga lamanzi owelaphayo kanye nesabelomali sakho sezindleko. Ngithemba ukuthi unolwazi oluhle lokuhlanza amanzi. Njengomhlinzeki wamakhemikhali wokwelashwa kwamanzi onolwazi lweminyaka engama-28. Ngiyajabula ukuxazulula zonke izinkinga zakho (mayelana namakhemikhali okuhlanza amanzi).