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Indlela i-PolyDADMAC Ethuthukisa Ngayo Ukwelashwa Kwangaphambi Kokwelashwa Ngaphambi Kokususwa Kwe-PFAS Technologies

Ukwelashwa Kwangaphambi Kwesitshalo Sokwelapha Amanzi Okuthuthukisiwe

Izinto ze-Per- kanye ne-polyfluoroalkyl (PFAS), ezaziwa kakhulu ngokuthi “amakhemikhali angunaphakade,” ziye zaba ngenye yezinkinga ezibaluleke kakhulu zomthetho zokwelashwa kwamanzi okuphuza kulo lonke elaseYurophu. Ngenxa yokuphikelela kwazo endaweni ezungezile kanye nokumelana nezinqubo zokwelashwa ezivamile, i-PFAS ikhuthaze izidingo zokuqapha eziqinile kanye nokutshalwa kwezimali okwandisiwe kubuchwepheshe obuthuthukisiwe bokwelashwa kwamanzi kulo lonke i-European Union.

Izinyathelo Ezibalulekile Zokulawula ze-PFAS eFrance nase-European Union

  • 12 Januwari 2021
    Isiqondiso (EU) 2020/2184 ngekhwalithi yamanzi ahloselwe ukusetshenziswa ngabantu saqala ukusebenza, sethula i-PFAS ohlakeni lokulawula amanzi okuphuza lwe-EU okokuqala. Isiqondiso sasungula amanani ayisisekelo kokubili "i-PFAS Total" kanye "ne-Sum of PFAS", esidinga ukuthi amazwe angamalungu afake ukuqapha kwe-PFAS ekuphathweni kwamanzi okuphuza.
  • 12 Januwari 2023
    Amazwe Angamalungu e-EU, okuhlanganisa neFrance, kwakudingeka ukuthi aguqule i-Directive (EU) 2020/2184 ibe ngumthetho kazwelonke, aqale ukusetshenziswa kwezimfuneko ezintsha zokuqapha kanye nokuthobela imithetho ye-PFAS.
  • 4 Ephreli 2024
    Uhulumeni waseFrance wethule uhlelo lokusebenza lwe-Interministerial PFAS Action Plan (2024–2027), olubeka isu likazwelonke lokuqinisa ukuqapha kwe-PFAS, ukunciphisa ukukhishwa kwegesi ezimbonini, ukuthuthukisa ukuqapha amanzi okuphuza, ukusheshisa ucwaningo lwesayensi, kanye nokuthuthukisa ukucaca komphakathi.
  • 12 Januwari 2026
    Amanani e-PFAS parametric asungulwe ngaphansi kwe-Directive (EU) 2020/2184 asebenza ngokugcwele kulo lonke i-European Union. Abahlinzeki bamanzi kulindeleke ukuthi bahambisane nemikhawulo ephoqelekile ye-PFAS emanzini okuphuza, okwenza ukwelashwa kwangaphambi kokwelashwa kanye nokwenza ngcono ukwelashwa okuthuthukisiwe kubaluleke kakhulu.

Nakuba ubuchwepheshe obufana ne-granular activated carbon (GAC), i-ion exchange, i-nanofiltration (NF), kanye ne-reverse osmosis (RO) busetshenziswa kabanzi ekunciphiseni i-PFAS, ukusebenza kahle kwabo kuncike kakhulu kwikhwalithi yamanzi angenayo. Ukugxila okuphezulu kwezinto eziqinile ezimisiwe, izinhlayiya ze-colloidal, i-turbidity, kanye nezinto zemvelo eziphilayo (NOM) kungasheshisa ukungcola kwe-membrane, kwandise umthwalo we-activated carbon, futhi kukhuphule izindleko zokusebenza.

Kulesi simo, ukuqina kwegazi okusebenzayo kanye nokucacisa kuye kwaba okubaluleke kakhulu.I-PolyDADMACkufaneleakufanele ibhekwe njengekhemikhali yokususa i-PFAS ngqo. Esikhundleni salokho, isebenza njenge-cationic coagulant eshaja kakhulu ethuthukisa ukwelashwa kwangaphambi kokwelashwa ngokuthuthukisa ukusebenza kahle kwe-coagulation, ukunciphisa izinto eziqinile ezimisiwe, nokudala izimo zokusebenza ezinhle kakhulu zobuchwepheshe bokwelapha be-PFAS obungezansi.

Kulesi Sihloko

Kulesi sihloko, uzofunda:

Kungani Ukwelashwa Kwangaphambi Kokusebenza Kubaluleke Kakhulu Ekwelapheni Amanzi Kwanamuhla

Njengoba izindinganiso zokwelashwa kwamanzi ziqhubeka nokuguquka, izinsizakusebenza kulindeleke ukuthi zisuse hhayi nje kuphela ukungcola okuvamile kodwa futhi nokungcola okuvelayo ngenkathi zigcina imisebenzi ephumelelayo nengabizi kakhulu. Ubuchwepheshe bokwelapha obuthuthukisiwe njenge-granular activated carbon (GAC), i-ion exchange, i-nanofiltration (NF), kanye ne-reverse osmosis (RO) sebuvame kakhulu, kodwa ukusebenza kwazo kwesikhathi eside kuncike kakhulu ekwelashweni okuphumelelayo kwangaphambi kwesikhathi.

Ukwelashwa okungekuhle kusengaphambili kuvumela izinto eziqinile ezimisiwe, izinhlayiya ze-colloidal, ukungcoliswa, kanye nezinto zemvelo eziphilayo (NOM) ukuthi zingene ezinhlelweni zokwelapha ezingezansi. Lokhu kungcola kungasheshisa ukungcola kwe-membrane, kwandise umthwalo we-activated carbon, kunciphise ukusebenza kahle kwenqubo, futhi kukhuphule izindleko zokulungisa nezokusebenza.

Kuyasebenza ukujiya kanye nokucaciswa kusiza ukususa lezi zinto ezingcolile ezingahlosiwe ngaphambi kokuba ukwelashwa okuthuthukisiwe kuqale. Ngokuthuthukisa ikhwalithi yamanzi esigabeni sangaphambi kokwelashwa, izitshalo zamanzi zingathuthukisa ukuthembeka nokusebenza kahle kwezinqubo ezingezansi ngenkathi zandisa impilo yesevisi yemishini yokwelapha.

Ezinhlelweni zokwelapha ezibhekana nokungcola okufana ne-PFAS, ukwelashwa kwangaphambi kwesikhathi akususi ngqo ama-compounds aqondiwe, kodwa kunikeza ithonya elihlanzekile elisiza ubuchwepheshe obuthuthukisiwe ukuthi busebenze kahle futhi ngokungaguquguquki.

Isigaba Sokulungisa Amanzi Ezimboni

Indlela i-PolyDADMAC Ethuthukisa Ngayo Ukusebenza Kokubumbana

I-PolyDADMACiyi-high charge-densityi-polymer ye-cationicisetshenziswa kabanzi njenge-coagulant eyinhloko noma usizo lwe-coagulant emanzini okuphuza kanye nokwelashwa kwamanzi ezimboni. Ngokungafani nama-coagulant angaphili athembele kakhulu ekufakweni kukasawoti wensimbi, i-PolyDAMAC isebenza ngokuyinhloko ngokususa i-charge, iqeda ngokushesha izinhlayiya ezilengayo ezishajelwe kabi kanye nama-colloid ukuze kukhuthazwe ukwakheka kwama-floc amakhulu, aminyene.

Lokhu kwakheka kwe-floc okuthuthukisiwe kuthuthukisa ukuhlukaniswa koketshezi oluqinile ngesikhathi sokuthungwa kanye nokuhlunga, okuholela ekungcoleni okuphansi kanye nokunciphisa izinto eziqinile ezilengisiwe emanzini aphathwe. Ngokukhiqiza ama-floc aqinile futhi aqinile, i-PolyDADMAC ingathuthukisa nokusebenza kahle kokucacisa ngaphansi kwezimo zamanzi aluhlaza ahlukahlukene, isize izitshalo zokwelapha zigcine ukusebenza okuzinzile.

Ezinhlelweni zokwelashwa kwamanzi zanamuhla, ukuqina okusebenzayo kungaphezu kwesinyathelo esivamile sokwelashwa kwangaphambi kwesikhathi—kubeka isisekelo sezinqubo ezingezansi. Amayunithi okwelashwa ahlanzekile angena ngama-unit okwelashwa athuthukile angasiza ekunciphiseni ukulayisha okungadingekile kwezinhlayiya, athuthukise ukuzinza kokusebenza, futhi asekele ukusebenza kahle kobuchwepheshe obufana nokumuncwa kwekhabhoni okusebenzayo kanye nokuhlunga kwe-membrane.

Nakuba i-PolyDADMAC ingaklanyelwe ukususa i-PFAS ngqo, ikhono layo lokwenza ngcono ukuqina nokukhanya liyenza ibe yikhemikhali yokwelapha ewusizo ezitimeleni zokwelapha lapho kusetshenziswa khona ubuchwepheshe obuthuthukisiwe bokususa i-PFAS. Ngokuthuthukisa ikhwalithi yamanzi ngaphambi kokuba ifinyelele kulezi zinqubo ezingezansi, i-PolyDADMAC inegalelo ohlelweni lokwelapha oluthembekile nolusebenza kahle kakhulu.

Ukunciphisa Izinto Eziqinile Ezimisiwe Ngaphambi Kokwelashwa Okuthuthukisiwe

Izinto eziqinile ezilengayo zingenye yezinto eziyinhloko ezithinta ukusebenza kwezinqubo zokwelashwa kwamanzi ezithuthukisiwe. Izinhlayiya ezincane, ama-colloid, nezinye izinto ezingancibiliki zingadlula ekunakekelweni okunganele kwangaphambi kokwelashwa, okwandisa umthwalo kumayunithi okwelashwa angaphansi komfula futhi kuholele ezindleleni eziphezulu zokusebenza nokulungisa.

Ngokuthuthukisa ukuqina nokwakheka kwe-floc, i-PolyDADMAC isiza ukususa izinto eziqinile ezimisiwe ngempumelelo enkulu ngesikhathi sokucwengwa kanye nokuthungwa. Ama-floc amakhulu, aminyene ahlala kalula, okuholela emanzini acwebezelayo angena ezigabeni zokwelashwa ezilandelayo.

Ukunciphisa izinto eziqinile ezilenga ngaphambi kokwelashwa okuthuthukile kunikeza izinzuzo eziningana zokusebenza, okuhlanganisa:

  • Ukulayisha okuphansi kwezinhlayiya ezinhlelweni zokwelapha ezingezansi komfula
  • Ukucaciswa okuthuthukisiwe kanye nokusebenza kahle kokuhlunga
  • Ukusebenza okuzinzile ngaphansi kwezimo zamanzi aluhlaza ezishintshayo
  • Izidingo zokunakekelwa ezincishisiwe zezinqubo zokwelapha ezilandelayo

Nakuba izinto eziqinile ezilengayo zingeyona i-PFAS, ukunciphisa ukuba khona kwazo ngesikhathi sokwelashwa kwangaphambi kokwelashwa kudala izimo zokusebenza ezinhle kakhulu zobuchwepheshe obuthuthukisiwe njengokuhlunga kwekhabhoni esebenzayo kanye ne-membrane. Lokhu kuvumela lezi zinhlelo ukuthi zigxile ekususeni izinto ezingcolisayo eziqondiwe kunokusingatha izinto ezingcolisayo ngokweqile, okusiza ekuthuthukiseni ukusebenza kahle kokwelashwa kanye nokuthembeka kokusebenza.

Ukwelashwa Kwangaphambi Kwekhabhoni Esebenzisa I-Granular

Ukusekela Ukusebenza Kwekhabhoni Esebenzayo

1. I-granular activated carbon (GAC) isetshenziswa kabanzi ekwelashweni kwamanzi okuthuthukisiwe ukususa ukungcola okungokwemvelo, okuhlanganisa ne-PFAS. I-GAC isusa kakhulu ama-PFAS ngokusebenzisana kwe-hydrophobic, ukusebenza kwayo kungathinteka yikhwalithi yamanzi angenayo. Amazinga aphezulu ezinto eziqinile ezimisiwe, izinhlayiya ze-colloidal, kanye nezinto zemvelo eziphilayo (NOM) zingase zithathe izindawo zokumunca, zandise ukulahlekelwa yikhanda, futhi zifinyeze impilo yokusebenza esebenzayo yombhede wekhabhoni.

Ukusebenzisana kwe-electrostatic namaqembu e-polyDADMAC e-quaternary ammonium functional kusize ukubopha ama-ion e-organic kanye ne-inorganic kanye neqembu eliyinhloko lama-PFAS amafushane, okuvumela ukususwa kwe-PFAS okuphelele yi-GAC. Kuleso simo, ukumuncwa kwama-PFAS e-anionic kungathuthukiswa ngokwengeza ama-polymer e-cationic njenge-poly diallyldimethylammonium chloride (polyDADMAC).

2. Ukwelashwa okuphumelelayo ngaphambi kwesikhathi nge-PolyDADMAC kusiza ukuthuthukisa ukujiya nokucaca, kunciphisa inani lezinhlayiya kanye nomthwalo wezinto eziphilayo ongena ohlelweni lwe-GAC. I-Cleaner influent ivumela i-activated carbon ukuthi isebenze ngaphansi kwezimo ezizinzile, isiza ekugcineni ukusebenza kahle kokumuncwa futhi inciphise imvamisa yokugeza ngemuva noma ukushintshwa kwe-carbon.

Njengengxenye yesitimela sokwelapha esiklanywe kahle, ukwelashwa kwangaphambili okulungiselelwe kungasiza ekusebenzeni okuthembekile kakhulu kanye nokusebenza kahle kwezindleko kwezinqubo ze-GAC ezingezansi.

Nciphisa Ukungcola Kwe-Membrane Ngokucacisa Okungcono

Ubuchwepheshe be-membrane njenge-ultrafiltration (UF), i-nanofiltration (NF), kanye ne-reverse osmosis (RO) buyasetshenziswa kakhulu ekuphathweni kwamanzi kwanamuhla ngenxa yokusebenza kahle kakhulu kokuhlukaniswa. Kodwa-ke, ukusebenza kwe-membrane kuncike kakhulu ekwelashweni okuphumelelayo kwangaphambi kokwelashwa. Izinto eziqinile ezilengisiwe, izinhlayiya ze-colloidal, kanye nezinto zemvelo eziphilayo (NOM) ezingasuswanga ngokwanele zinganqwabelana ezindaweni ze-membrane, okuholela ekungcoleni, ekunciphiseni ukugeleza kwamanzi, kanye nokuhlanza njalo.

Ngokuthuthukisa ukuqina nokucaca, i-PolyDADMAC isiza ekunciphiseni umthwalo wezinhlayiya ezingena ezinhlelweni ze-membrane. Ukususwa okuphumelelayo kwezinhlayiya ezincane nama-colloid phezulu kunegalelo ekuhlanzekeni okuhlanzekile, okuvumela izinhlayiya ukuthi zisebenze ngaphansi kwezimo ezizinzile.

Nakuba i-PolyDADMAC ingavimbeli ukungcoliswa kwe-membrane ngqo, ukwenza ngcono ukwelashwa kwangaphambi kwesikhathi kungasiza ekunciphiseni ingozi yokungcoliswa kwe-particulate, kunciphise imvamisa yokuhlanza, futhi kusekele imijikelezo yokusebenza emide. Njengengxenye yenqubo yokwelapha ehlanganisiwe, ukucaciswa okuphumelelayo kusiza ekuthuthukiseni ukusebenza kahle kanye nokuthembeka kwezinhlelo zokuhlunga i-membrane ezingezansi.

Izicelo ze-PolyDADMAC ku-Mainstream Water Treatment kanye ne-Industrial Water Treatment

I-PolyDADMAC isetshenziswa kabanzi kokubili ekuphathweni kwamanzi kamasipala nasezimbonini ngenxa yokuminyana kwayo okukhulu kwe-cationic charge, ukusebenza kwayo okusheshayo kokujiya, kanye nokuhambisana nezinqubo ezahlukene zokwelapha. Ingasetshenziswa njenge-coagulant eyinhloko noma njengesiza se-coagulant ukuthuthukisa ukusebenza kahle kokucacisa ngaphansi kwezimo ezahlukene zamanzi aluhlaza.

Ekuhlanzweni kwamanzi okuphuza kamasipala, i-PolyDADMAC ivame ukusetshenziswa ukunciphisa ukungcoliswa kwamanzi, izinto eziqinile ezilengisiwe, kanye nezinhlayiya ze-colloidal ngaphambi kokuhlunga nokubulala amagciwane. Ukwelashwa kwangaphambi kwesikhathi okuphumelelayo kusiza ekuqiniseni ikhwalithi yamanzi futhi kuthuthukise ukusebenza kwezinqubo zokwelashwa ezingezansi, ikakhulukazi emithonjeni yamanzi angaphezulu lapho ukushintshashintsha kwezinkathi kungathinta kakhulu ikhwalithi enethonya.

Ekuphathweni kwamanzi ezimbonini, i-PolyDADMAC isetshenziswa emikhakheni eyahlukahlukene, okuhlanganisa ukudla neziphuzo, i-pulp nephepha, izindwangu, ukukhiqizwa kwamakhemikhali, ukumbiwa kwezimayini, kanye nokusetshenziswa kabusha kwamanzi amdaka. Ngokuthuthukisa ukuhlukaniswa koketshezi oluqinile kanye nokusebenza kahle kokucacisa, kusiza ukuthuthukisa ukusebenza kokwelashwa ngenkathi kusekela ukusebenza kwesitshalo okuzinzile kakhudlwana.

Izinto Ezibalulekile Okufanele Uzicabangele Lapho Ukhetha I-PolyDADMAC

Uma uhlola i-PolyDADMAC yokwelashwa kwamanzi kamasipala noma ezimbonini, cabangela lezi zici ezilandelayo:

  • Ubuningi beshaja:Ubuningi bamashaja aphezulu ngokuvamile buhlinzeka ngokunciphisa amandla okushaja, okwenza kufaneleke emanzini anezinga eliphezulu lama-colloid ashaja kabi kanye nezinhlayiya ezilengayo.
  • Ukugxila Komkhiqizo:I-Liquid PolyDADMAC itholakala ngokuqukethwe okusebenzayo okuhlukahlukene. Ukukhetha ukuhlushwa okufanele kungasiza ekulinganiseni ukunemba komthamo, umthamo wokugcina, kanye nokusebenza kahle kokuthutha.
  • Ikhwalithi Yamanzi Aluhlaza:Amapharamitha anjengokugcwala kwamanzi, izinto eziqinile ezimisiwe, izinto zemvelo eziphilayo (NOM), i-pH, kanye nokushintshashintsha kwesizini konke kuthinta ukusebenza kokuqina kwamanzi futhi kufanele kucatshangelwe ngesikhathi sokukhethwa komkhiqizo.
  • Ukuhambisana Nezinqubo Zokwelapha Ezikhona:I-PolyDADMAC kufanele ihlolwe kanye nama-coagulant akhona, ama-flocculant, izinhlelo zokulinganisa, kanye nobuchwepheshe bokwelapha obuphansi ukuqinisekisa ukuhlanganiswa kwenqubo okuzinzile.
  • Ukuhlolwa Kwezimbiza Nokuhlolwa Kokuhlola:Ukuhlolwa kwebhodlela lelabhorethri kanye nokuhlolwa kokuhlola endaweni kuseyizindlela ezithembeke kakhulu zokunquma umthamo ofanele kanye nokuqinisekisa ukusebenza kokwelashwa ngaphansi kwezimo zokusebenza zangempela.

Ukukhetha ibanga elifanele le-PolyDADMAC kudinga ukuhlolwa ngokucophelela kwekhwalithi yamanzi akho, izinhloso zokwelashwa, kanye nemininingwane yomkhiqizo. Uma ungathanda ukubuka konke okuphelele kwezindlela zokukhetha ezibalulekile, hlola isihloko sethu esihlobene:Indlela Yokukhetha I-PolyDADMAC Efanele: Umhlahlandlela Wokukhetha Osebenzayo.Ihlanganisa izici ezibalulekile njengesisindo sama-molecule, ubuningi beshaja, i-viscosity, okuqukethwe okusebenzayo, kanye nezincomo eziqondene nohlelo lokusebenza.

Isiphetho

Nakuba i-PolyDADMAC ingaklanyelwe ukususa i-PFAS ngqo, idlala indima ebalulekile yokusekela ngokuthuthukisa ukujiya nokucaca, ukunciphisa izinto eziqinile ezilengisiwe, nokudala ithonya elihlanzekile lezinhlelo zokwelapha ezingezansi. Lezi zinzuzo zingasiza ekusekeleni ukusebenza kwekhabhoni esebenzayo, ukunciphisa ingozi yokungcola kwe-membrane, futhi kufake isandla ekusebenzeni kwesitshalo okuzinzile nokungabizi kakhulu.

Njengoba iFrance ne-European Union ziqhubeka nokuqinisa imithetho ye-PFAS, izikhungo zokwelashwa kwamanzi zigcizelela kakhulu ekuthuthukiseni ukusebenza kahle nokuthembeka kwezinqubo zazo zokwelashwa. Ezikhungweni zamanzi zikamasipala nezezimboni ngokufanayo, ukwenza ngcono ukwelashwa kwangaphambi kwesikhathi sekuba isu elibalulekile lokuhlangabezana nezidingo zekhwalithi yamanzi eziqinile. Ukukhetha i-PolyDADMAC efanele nokwenza ngcono ukusetshenziswa kwayo ngokuhlola okufanele kungasiza ekukhuliseni ukusebenza kahle kokwelashwa okuphelele futhi kusekele ukusebenza kwesikhathi eside kwezinqubo zokwelashwa kwamanzi ezithuthukisiwe.

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