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Sukanyah Shanmuganathan,Tien Vinh Nguyen,W.G. Shim,Jaya Kandasamy,Andrzej Listowski,Saravanamuthu Vigneswaran 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.6
Applying pre-treatments to remove dissolved organic matter from reverse osmosis (RO) feed can help toreduce organic fouling of the RO membrane. In this study the performance of granular activated carbon(GAC), a popular adsorbent, and purolite A502PS, an anion exchange resin, in removing effluent organicmatter (EfOM) from RO feed collected from a water reclamation plant located at Sydney Olympic Park,Australia were evaluated and compared through adsorption equilibrium, kinetics and fluidized bedexperiments. The maximum adsorption capacity (Qmax) of GAC calculated from the Langmuir model withRO feed was 13.4 mg/g GAC. The operational conditions of fluidized bed columns packed with GAC andpurolite A502PS strongly affected the removal of EfOM. GAC fluidized bed with a bed height of 10cm andfluidization velocity of 5.7 m/h removed more than 80% of dissolved organic carbon (DOC) during a 7 hexperiment. The average DOC removal was 60% when the bed height was reduced to 7 cm. Whencomparing GAC with purolite A502PS, more of the laterwas required to remove the same amount of DOC. The poorer performance of purolite A502PS can be explained by the competition provided by otherinorganic anions present in RO feed. A plug flow model can be used to predict the impact of the amount ofadsorbent and of the flow rate on removal of organic matter from the fluidized bed column.
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