Izizathu kunye nezisombululo zeReverse Osmosis Membrane Fouling

1. Izizathu eziphambili ze-RO Membrane Fouling

Ngokuxhomekeke kwiifouli, i-RO membrane fouling yahlulwe ngokubanzi kwiindidi ezine:

• Ukulinganisa Okungaphiliyo (Ukungcola Kwekhemikhali): Ngexesha lenkqubo yoxinzelelo lwe-RO, iityuwa ezinyibilikayo kancinci ezifana ne-calcium, i-magnesium, i-carbonates, i-sulfates, kunye ne-silicates emanzini okutya zidlula umda wazo wokunyibilika. Ziyanyibilika kwaye zibeke phezu komphezulu we-membrane, zenze umaleko oqinileyo.
• Ukungcola okungokwemvelo kunye neColloidal (Ukungcola okukrakra): Izinto zendalo eziphilayo (umz., i-humic acid), iioyile, izinto ezibangela ukudumba, okanye amasuntswana asuswe ngokupheleleyo kunye nee-colloids emanzini okutya zinamathela kumphezulu we-membrane. Oku kwenza umaleko ongcolileyo oqinileyo ongagcini nje ngokuvala ii-pores ze-membrane kodwa ufunxa nezinye izinto ezingcolileyo.
• Ukungcola Kwebhayoloji (Ukungcola Kokuzala): Xa ukubulala iintsholongwane emanzini okutya kunganeli, iintsholongwane ezifana neebhaktheriya, iifungi, kunye ne-algae ziphindaphindeka ngokukhawuleza kumphezulu we-membrane. Zenza i-biofilm eqinileyo kwaye zikhuphe ii-metabolites ezinokonakalisa izinto ze-membrane.
• Ukungcolisa iinxalenye (Ukungcolisa umzimba): Amasuntswana aqinileyo axhonyiweyo njengesanti kunye nomhlwa emanzini okutya adla ngokungena kwinkqubo ngenxa yokungonelanga okanye ukungasebenzi kakuhle kwangaphambili. Ahlala kumphezulu we-membrane okanye kwiindawo ezinqamlezileyo zeendawo zokutya.

2. Indlela Yokufumanisa Ukuba Ukucoca Kuyafuneka

Ukucoca ngokuqhelekileyo kuyadingeka xa inkqubo inezi meko zilandelayo:

• Ukuncipha Kokuhamba Komhlaba: Ukuhamba kwamanzi angena emzimbeni ngendlela eqhelekileyo kwehla nge-10% ~ 15% xa kuthelekiswa nesiseko sokuqala.
• Ukwehla koxinzelelo okwandileyo: Ukwehla koxinzelelo phakathi kwamanqanaba kuyanda kakhulu (umz., ngaphezulu kwe-15%, okanye ukwehla koxinzelelo kwinqanaba lokuqala kudlula i-0.25 MPa).
• Ukuncipha kokulahlwa kwetyuwa: Umgangatho wamanzi angena uyawohloka, kunye nokuhamba kwetyuwa okuqhelekileyo kuyanda nge-10% ~ 15%.

3. Izisombululo kunye neMigqaliselo yokucoca

Isisombululo esiphambili sokungcolisa i-membrane yi Ukucoca-Kwindawo (i-CIP), equka ukucoca ngokwasemzimbeni nangokweekhemikhali.

Ukucoca umzimba

Isetyenziswa kakhulu ukususa izinto ezingcolisayo kumphezulu we-membrane (umz., ukungcola okuncinci kwe-particles). Ibandakanya ukuhlamba ngamanzi acocekileyo aphantsi koxinzelelo, ahamba ngokukhawuleza, kusetyenziswa amandla okusika amanzi ukuze kuhlanjwe izinto ezingcolisayo. Ukucoca okuxutyiweyo ngamanzi anomoya nako kungasetyenziselwa ukuphucula umphumo.

Ukucoca iikhemikhali

Kufuneka kukhethwe iikhemikhali ezifanelekileyo zokujikeleza nokumanzisa ngokusekwe kuhlobo oluthile lokungcolisa:

• Kwi-Inorganic Scaling: Sebenzisa izicoci ze-asidi (umz., i-0.2% ~ 1% ye-citric acid okanye i-hydrochloric acid, i-pH elawulwa kwi-2-3) ukuze inyibilikise ngempumelelo ii-carbonates kunye nee-metal oxides.
• Kwizinto eziphilayo, iiColloids, kunye neBiological Fouling: Sebenzisa izicoci ze-alkaline (umz., i-0.1% ~ 0.5% ye-sodium hydroxide idityaniswe nee-surfactants okanye i-EDTA, i-pH elawulwayo kwi-10-12) ukunyibilikisa ukungcola okuxineneyo kunye nokususa ii-biofilms.
• Ungcoliso oluDibeneyo: Ukucoca i-alkaline kudla ngokwenziwa kuqala ukuze kususwe ukungcola kwezinto eziphilayo/eziphilayo, kulandele ukucoca okune-asidi ukuze kususwe ukungcola okungenazinto eziphilayo.

Inkqubo yokucoca eqhelekileyo

1. Hlamba ngaphambi kokuba uhlambe: Cima inkqubo uze uyihlambe ngoxinzelelo oluphantsi nge-RO permeate ukuze ukhuphe amanzi okutya aseleyo kwi-membrane modules.
2. Ukulungiselela Isisombululo kunye nokujikeleziswa kwaso: Lungisa isisombululo sokucoca ngokwesilinganiso esichaziweyo. Sipompe kwinkqubo ngoxinzelelo oluphantsi (ngesiqhelo ≤0.2~0.3 MPa) kwaye kwisiqingatha sesantya sokuhamba kokucoca esiqhelekileyo. Sijikeleze imizuzu engama-30-60.
3. Ukuntywila: Yeka ukujikeleza kwegazi kwaye uvumele isisombululo sokucoca singene ngaphakathi kwi-membrane kangangexesha elithile (umz., sijikeleze imizuzu eli-10, uze umise kwaye usintywilisele imizuzu emi-5) ukuvumela iarhente ukuba ingene ngokupheleleyo kumaleko ongcolisayo.
4. Emva kokuhlamba: Khupha isicoci sokucoca uze uhlambe kakuhle inkqubo nge-permeate de i-pH emdaka ingabi nagwebu okanye ivumba.
5. Ukuqinisekiswa kokusebenza: Qala kwakhona inkqubo ukuze uvavanyo oluphantsi luqhutywe ukuze kubonwe ukuba ukuhamba kwamanzi kunye nokwaliwa kwetyuwa kubuyele kwi-90% yamaxabiso okuqala.

4. Iingcebiso zokuthintela kunye nokugcinwa rhoqo

• Lungiselela unyango lwangaphambi konyango: Phucula iinkqubo zangaphambi konyango ezifana nokujiya, ukucoca, kunye nokuthambisa ukuqinisekisa ukuba amanzi okutya aphantsi kweSilt Density Index (SDI) ingaphantsi kwe-5, nto leyo enciphisa ukungcoliswa komthombo.
• Ukuhlanjwa rhoqo emzimbeni: Ukuba iimeko ziyavuma, hlamba yonke imihla ngoxinzelelo oluphantsi, oluhamba ngesantya esiphezulu. Oku kusebenza ngakumbi kunokulinda ukuba kuqokeleleke ukungcola ngaphambi kokuba ucoce iikhemikhali.
• Umlinganiselo ofanelekileyo weekhemikhali: Tosa ubungakanani obufanelekileyo bezinto ezithintela ukubola, izinto ezisasaza izinambuzane, kunye nezinto ezibulala iintsholongwane ezikhethekileyo ngokusekelwe kumgangatho wamanzi okutya ukuze kuthintelwe ukukhula kweentsholongwane.
• Ukusebenza okuMiselweyo: Kuphephe ukugqithisa kakhulu inkqubo. Soloko uhlamba inkqubo ngaphambi kokuba uyivale ukuze uthintele ukuba izinto ezingcolisayo zingami phezu komphezulu we-membrane.

⚠️ Ukulumkela: Ungaze usebenzise ngokungaboniyo ubuninzi obuphezulu bee-asidi okanye ii-alkali ezinamandla, okanye wandise amaxesha okucoca, njengoko oku kuya kubangela umonakalo ongenakuguqulwa kumaleko osebenzayo we-membrane. Ukuba ukucoca kwi-intanethi akusebenzi okanye ukungcolisa kukhulu kakhulu, cinga ngokususa izinto ze-membrane ukuze uzicoce ngobuchwephesha ngaphandle kwe-intanethi okanye uzitshintshe ngokupheleleyo.