Effects of magnetic ion-exchange resin addition during coagulation on floc properties and membrane filtration.
The application of magnetic ion-exchange resin (MIEX) during chemical coagulation was investigated for the removal of organic matters responsible for fouling in membrane processes. Two different coagulants were used-polyaluminium chloride (PAC1) and polyaluminum chloride silicate (PACS). The MIEX addition during coagulation with both PAC1 and PACS considerably enhanced removal of dissolved organic carbon. Coagulation with MIEX treatment substantially removed all portions of natural organic matter (NOM), while the MIEX treatment alone effectively removed the hydrophobic and transphilic portions of NOM. The enhanced NOM removal by PAC1 coagulation with the addition of MIEX had positive effects on membrane flux at moderate transmembrane pressure conditions. However, the almost identical flux patterns were reported in the experiments of coagulation with PACS and PACS with MIEX addition. The results of the specific cake resistances indicated that the MIEX addition substantially decreased the resistances. The larger size distributions of PAC1 with MIEX corresponded well with the flux improvement.
Choi
Yang Hun
YH
Department of Environmental Engineering, College of Engineering, Konkuk University, Seoul, Korea.
Kweon
Ji Hyang
JH
Jeong
Young Mi
YM
Kwon
Soonbuhm
S
Kim
Hyung-Soo
HS
D000536:Aluminum Hydroxide / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry*; D005374:Filtration; D007475:Ion Exchange Resins / Q000737:chemistry*; D008280:Magnetics; D018505:Waste Management / Q000379:methods*
D000538:Aluminum Silicates; D007475:Ion Exchange Resins; C533809:polyaluminum silicate chloride; C016213:aluminum oxychloride; D000536:Aluminum Hydroxide