Flocculation - Aluminium sulphate vs Poly aluminium chloride

Flocculation ndi njira imene zoipa mlandu inaimitsidwa particles kupezeka mu khola kuyimitsidwa m'madzi ndi destabilized. Izi zimatheka powonjezera coagulant yabwino. The zabwino mlandu mu coagulant neutralizes zoipa mlandu alipo m'madzi (ie destabilizes izo). Pamene particles ali destabilized kapena neutralized, ndi flocculation ndondomeko zimachitika. Tinthu tating'onoting'ono tating'onoting'ono timaphatikizana kukhala tinthu tating'onoting'ono tokulirapo mpaka titalemera mokwanira kuti titha kukhazikika ndi matope kapena zazikulu zokwanira kutsekera thovu la mpweya ndikuyandama.

Lero tiyang'ana mwatsatanetsatane za flocculation katundu awiri wamba flocculants: poly aluminium kolorayidi ndi aluminium sulphate.

Aluminium Sulfate: Aluminium Sulfate ndi acidic m'chilengedwe. Mfundo ntchito zitsulo zotayidwa sulphate ndi motere: zotayidwa sulphate umabala zotayidwa hydroxide, Al (0H) 3. Aluminiyamu hydroxides ndi malire pH osiyanasiyana, pamwamba amene sadzakhala mogwira hydrolysis kapena , hydrolyzated zotayidwa hydroxides anakhazikika mwamsanga pH mkulu (ie pH pamwamba 8.5), kotero ntchito pH ayenera mosamala ankalamulira kusunga mu osiyanasiyana 5.8-8.5 . alkalinity m'madzi iyenera kukhala yokwanira pa nthawi ya flocculation kuti iwonetsetse kuti insoluble hydroxide imapangidwa bwino komanso imawombedwa. Imachotsa mitundu ndi zida za colloidal kudzera pakuphatikiza kwa adsorption ndi hydrolysis pa/muzitsulo zachitsulo. Choncho, ntchito pH zenera za zotayidwa sulphate ndi mosamalitsa 5.8-8.5, choncho n'kofunika kwambiri kuonetsetsa zabwino pH kulamulira lonse ndondomeko ntchito zotayidwa sulphate.

Polyaluminium kloride(PAC) ndi imodzi mwamankhwala othandiza kwambiri oyeretsa madzi omwe amagwiritsidwa ntchito masiku ano. Amagwiritsidwa ntchito kwambiri pochiza madzi akumwa ndi madzi otayira chifukwa champhamvu kwambiri yolumikizirana komanso kusiyanasiyana kwa pH ndi kutentha kumagwiritsidwa ntchito poyerekeza ndi mankhwala ena opangira madzi. PAC imapezeka m'makalasi angapo osiyanasiyana okhala ndi alumina kuyambira 28% mpaka 30%. Kukhazikika kwa alumina sikungoganizira kokha posankha giredi ya PAC yoti mugwiritse ntchito.

PAC ikhoza kuwonedwa ngati pre-hydrolysis coagulant. The pre-hydrolysis aluminiyamu masango ndi mkulu kwambiri zabwino mlandu kachulukidwe, zomwe zimapangitsa PAC kwambiri cationic kuposa alum.making izo amphamvu destabilizer kwa zoipa mlandu inaimitsidwa zonyansa m'madzi.

PAC ili ndi zabwino zotsatirazi kuposa aluminiyamu sulphate

1. Imagwira ntchito m'malo otsika kwambiri. Monga lamulo, mlingo wa PAC ndi pafupifupi gawo limodzi mwa magawo atatu a mlingo wofunikira kwa alum.

2. Imasiya aluminiyamu yotsalira m'madzi oyeretsedwa

3. Zimatulutsa matope ochepa

4. Imagwira ntchito pa pH yochuluka

Pali mitundu yambiri ya flocculants, ndipo nkhaniyi imangoyambitsa ziwiri za izo. Posankha coagulant, muyenera kuganizira za madzi omwe mukuchiza komanso bajeti yanu. Ndikukhulupirira kuti muli ndi chidziwitso chabwino choyeretsera madzi. Monga wothandizira mankhwala ochizira madzi omwe ali ndi zaka 28. Ndine wokondwa kuthetsa mavuto anu onse (zamankhwala opangira madzi).