The treatment of raw water by hybrid coagulation-ultrafiltration was investigated. Coagulation-ultrafiltration removed high molecular weight organics, preferentially humics. Adsorption of the trace compound cis-1,2-dichloroethene, present in raw water, on granular activated carbon was improved considerably as compounds competing for adsorption space had been removed. This was shown in isotherms and breakthrough curves. Aeration during filtration did not affect membrane performance as expressed in permeability. However, aeration in the submerged membrane container resulted in a release of organic matter from the flocs, which resulted in higher concentrations of dissolved organic carbon in the filtrate.
Influence of hybrid coagulation-ultrafiltration pretreatment on trace organics adsorption in drinking water treatment
S. Müller, W. Uhl; Influence of hybrid coagulation-ultrafiltration pretreatment on trace organics adsorption in drinking water treatment. Journal of Water Supply: Research and Technology-Aqua 1 May 2009; 58 (3): 170–180. doi: https://doi.org/10.2166/aqua.2009.071
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