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Sequential fractionation of value-added coconut products using membrane processes
Ching Yin Ng,Abdul Wahab Mohammad,Law Yong Ng,Jamaliah Md Jahim 한국공업화학회 2015 Journal of Industrial and Engineering Chemistry Vol.25 No.-
The coconut waste-skimmed coconut milk was employed for sequential fractionation using UF and NF membranes to produce value-added products (coconut proteins, plant hormones – kinetin and zeatin). The retention factors achieved by UF membrane (PS10): albumin (0.9822 0.0799) and globulin (0.9975 0.0783); NF membrane (NF1): kinetin (0.9238 0.0345) and zeatin (0.9511 0.0355). Coconut protein powder was obtained after spray-drying process using concentrated coconut protein (UF retentate). SDS-PAGE showed that molecular weights of the coconut proteins were 17, 34, 55 and 150 kDa. Proximate and HPLC analyses revealed that the obtained samples were enriched with basic nutrients and well-balanced amino acids composition, respectively.
Ying Tao Chung,Abdul Wahab Mohammad,Law Yong Ng 한국공업화학회 2014 Journal of Industrial and Engineering Chemistry Vol.20 No.4
Membrane surface modification through UV-grafting method was studied and optimized using response surface methodology (RSM) approach. Sulfonated-polysulfone (SPS) membrane was modified through grafting process by employing methacrylic acid (MAA) monomer solution under the exposure of UV light. The parameters used were the concentration of MAA in the range of 0–6 wt% and UV activation time of 0–50 min. The optimized parameters from RSM were 2.61 wt% of MAA and 21.10 min of UV activation time. The optimized water permeability obtained was 8.75 L m 2 h 1 bar 1, while the rejection percentages for humic acid, NaCl and MgSO4 solution were 95.0%, 65.7% and 48.3%, respectively.