Effects of palm oil-based fatty acids on fouling of ultrafiltration membranes during the clarification of glycerin-rich solution |
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| Authors: | Indok Nurul Hasyimah Mohd Amin Mastura Markom |
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| Affiliation: | a Department of Chemical and Process Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, 43600 Bangi, Selangor, Malaysia
b School of Chemical Engineering, Engineering Campus, Universiti Sains Malaysia, 14300 Nibong Tebal, Seberang Perai Selatan, Pulau Pinang, Malaysia |
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| Abstract: | Ultrafiltration (UF) is an alternative option that can be used to clarify glycerin-rich solutions in the oleochemical industry. However, the UF membranes used in the process were observed to have been seriously fouled in our preliminary study. Thus, the ultrafiltration of a glycerol-water-fatty acid mixture was carried out to investigate the membrane binding properties of the components and their contributions to membrane fouling. Palmitic, stearic, and oleic acid were used as fouling substances in the glycerol-water mixture. The flux decline experiments were carried out using polyvinylidenefluoride (PVDF) as well as polyethersulphone (PES) membranes with a MWCO of 30 and 25 kDa, respectively at specific conditions (T = 40 °C; ΔP = 2 bar). It was found that the PES membrane exhibited severe fouling for all types of fatty acids in solution with glycerol-water. As the pH decreased to acidic conditions, the PES membrane tended to exhibit more severe fouling than the PVDF membrane. |
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| Keywords: | Ultrafiltration Fouling Fatty acid Glycerin Palm oil |
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