Enkambisweni yokwelashwa kwamanzi amdaka, kudingeka kudlule uchungechunge lwezinyathelo zokusebenza, futhi ngemva kokuhlolwa ukuze kuhlangatshezwane nezinga lokukhishwa, kuyakhishwa. Kulolu chungechunge lwezinqubo, i-flocculant idlala indima ebalulekile.I-Flocculantingathulula udaba olulengayo lwama-molecule amancane emanzini. Ukuhlala, okwenza kube lula ukuhlunga. Izinhlobo zama-flocculant nazo zicebile kakhulu. Indlela yokukhetha i-flocculant ekufanele nayo ibalulekile futhi ibalulekile. Ngokuphathelene nokukhetha ama-flocculant, abakhiqizi be-PAM kanye ne-PAC baneziphakamiso ezilandelayo:
Indlela yokukhetha i-flocculant ekuhlanzweni kwamanzi amdaka kufanele ikhethwe ngokwezici zamanzi amdaka embonini ethile. Ngesikhathi esifanayo, kuncike ekutheni i-flocculant ifakwe kuphi nokuthi isetshenziselwani. Ngokuvamile, lapho ukhetha i-flocculant engaphili, kufanele kucatshangelwe ukwakheka kwamanzi amdaka, bese ukhetha efanelekile (usawoti wensimbi, usawoti we-aluminium noma usawoti we-iron-aluminium, usawoti we-silicon-aluminium, usawoti we-silicon-ferric, njll.); ama-flocculant e-polymer angaphili afaka:i-polyaluminum chloride (I-PAC), i-polyaluminum sulfate (I-PAS), i-polyaluminum sulfochloride (I-PACS) kanyei-polyferric sulfate (I-PFS), njll. Phakathi kwazo, i-PAC ne-PAS ezimele kakhulu zinezici zokuzivumelanisa kahle nezinguquko zekhwalithi yamanzi ephathwa ngamakhemikhali okwelapha amanzi angavuthiwe, imiphumela emihle yokujiya kanye nokuhlanza, kanye nezindleko eziphansi zamakhemikhali.
Uma ukhetha i-flocculant ephilayo (njenge:i-polyacrylamide PAM), kuncike kakhulu ekutheni kusetshenziswa i-anionic polyacrylamide, i-cationic polyacrylamide noma i-nonionic polyacrylamide. Ama-anionic polyacrylamide asekelwe ezingeni le-hydrolysis. Ukukhethwa kwama-cation ngokuvamile kusetshenziswa ekususeni amanzi kodaka. Ukukhethwa kwe-cationic polyacrylamide kubaluleke kakhulu. Izitshalo zokuhlanza indle zasemadolobheni ngokuvamile zisebenzisa i-cationic polyacrylamide enamandla aphakathi nendawo. Ama-cation abuthakathaka ngokuvamile asetshenziselwa ukuphelelwa amanzi kodaka ekwenziweni kwephepha nokunyathelisa nokudaya izitshalo, futhi amanzi angcolile emithi asetshenziswa kakhulu. Khetha ama-cation aqinile njalo njalo. Uhlobo ngalunye lwamanzi angcolile lunezici zalo. I-non-ionic polyacrylamide isetshenziswa kakhulu ngaphansi kwezimo ezibuthakathaka ze-asidi, kanti i-non-ionic PAM isetshenziswa kakhulu ezimbonini zokunyathelisa nokudaya.
Abahlinzeki be-ejenti yokwelapha amanziSiphakamisa ukuthi ukukhethwa kwazo zonke lezi zinto ezikhipha amanzi kufanele kunqunywe ngokuya ngokuhlolwa. Esivivinyweni, nquma inani elilinganiselwe lokulinganisa, qaphela isivinini sokukhuhla kanye nokwehliswa kwenhlabathi, bala izindleko zokwelashwa, bese ukhetha i-ejenti yokukhuhla amanzi engabizi futhi esebenzayo.
Isikhathi sokuthunyelwe: Disemba 19-2022