Ungakhetha kanjani i-flocculant efanelekile ekwelashweni kwamanzi angcolile

Enqubweni yokwelashwa kwamanzi angcolile, idinga ukudlula uchungechunge lwezinyathelo zokusebenza, futhi ngemva kokuhlolwa ukuze ihlangabezane nezinga lokukhishwa, iyakhishwa.Kulolu chungechunge lwezinqubo, i-flocculant idlala indima ebalulekile.II-Flocculantingakwazi ukuntanta indaba emisiwe yama-molecule amancane emanzini.Ukuzinza, okwenza kube lula ukuhlunga.Izinhlobo ze-flocculants nazo zicebile kakhulu.Indlela yokukhetha i-flocculant evumelana nawe nayo ibalulekile futhi ibalulekile.Mayelana nokukhethwa kwama-flocculants, abakhiqizi be-PAM ne-PAC banalezi ziphakamiso ezilandelayo:

Indlela yokukhetha i-flocculant ekwelapheni kwamanzi angcolile kufanele kukhethwe ngokuvumelana nezici zamanzi angcolile embonini ethile.Ngesikhathi esifanayo, kubuye kuncike ekutheni i-flocculant yengezwe kuphi nokuthi isetshenziselwa ini.Ngokuvamile, lapho ukhetha i-flocculant ye-inorganic, ukwakheka kwamanzi angcolile kufanele kucatshangelwe, bese ukhetha okufanelekile (usawoti wensimbi, usawoti we-aluminium noma usawoti we-iron-aluminium, usawoti we-silicon-aluminium, usawoti we-silicon-ferric, njll.);I-inorganic polymer flocculants ihlanganisa:i-polyaluminium chloride (I-PAC), i-polyaluminium sulfate (I-PAS), i-polyaluminium sulfochloride (I-PACS) kanyei-polyferric sulfate (PFS), njll. Phakathi kwazo, i-PAC ne-PAS emele kakhudlwana inezici zokuvumelana nezimo ezinhle ezinguqukweni zekhwalithi yamanzi eziphathwa ngamakhemikhali okuhlanza amanzi aluhlaza, imiphumela emihle yokuhlangana nokuhlanzwa, kanye nezindleko eziphansi zamakhemikhali.

Lapho ukhetha i-flocculant ephilayo (njenge:polyacrylamide PAM), kuncike kakhulu ekutheni i-anionic polyacrylamide, i-cationic polyacrylamide noma i-nonionic polyacrylamide iyasetshenziswa.I-Anionic polyacrylamides isuselwa kuzinga le-hydrolysis.Ukukhethwa kwama-cations ngokuvamile kusetshenziselwa ukususa amanzi odaka.Ukukhethwa kwe-cationic polyacrylamide kubaluleke kakhulu.Izitshalo zasemadolobheni zokuhlanza indle ngokuvamile zisebenzisa i-cationic polyacrylamide eqinile emaphakathi.Ama-cations abuthakathaka ngokuvamile asetshenziselwa ukuphelelwa amandla kwamanzi e-sludge ekwenzeni iphepha kanye nokuphrinta nokudaya izitshalo, futhi amanzi angcolile emithi ngokuvamile asetshenziswa.Khetha ama-cation aqinile nokunye.Uhlobo ngalunye lwamanzi angcolile lunezici zalo.I-polyacrylamide engeyona i-ionic isetshenziswa kakhulu ngaphansi kwezimo ze-asidi ezibuthakathaka, futhi i-PAM engeyona i-ionic isetshenziswa kakhulu ezimbonini zokunyathelisa nezokudaya.

Abahlinzeki be-ejenti yokuhlanza amanzibasikisela ukuthi ukukhethwa kwawo wonke lawa ma-flocculants kufanele kunqunywe ngokuvumelana nokuhlolwa.Esivivinyweni, thola inani lesilinganiso sokudosa, bheka isivinini sokugeleza kanye ne-sedimentation, ubale izindleko zokwelashwa, bese ukhetha i-ejenti eyongayo nesebenzayo ye-flocculation.