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Mass-transfer model for humic acid removal by ultrafiltration

Galambos I., Csiszar E., Bekassy-Molinar E., Vatai G.

Environment Protection Engineering

2005

Vol. 31, nr 3-4

145-152

Humic acid (HA) molecules present in the soil dissolve in the water and can be found also in the well water. They have different size, molecular weight and structure. It is important to remove these molecules because they build carcinogenic by-products when they react with disinfectants. Membrane filtration can be an effective method of removing humic acid from water. Earlier experiments have proved that ultrafiltration membranes are proper for this task. The aim of this study was to find a new formula which helps to design a well-water filtration. We needed to model the mass transfer during the membrane filtration and to calculate the mass-transfer coefficient. The calculations were carried out in two ways: by using the results of laboratory measurements and criterial equations and by using heat-transfer analogy. The results reveal that the values measured and calculated are in agreement, the heat-transfer analogy can be applied and the equations are useful for designing the membrane for drinking water treatment.