Ultrafiltration of polysaccharide-protein mixtures: Elucidation of fouling mechanisms and fouling control by membrane surface modification
| Main Authors: | Susanto, Heru, Arafat, Hassan, M.L. Janssen, Elisabeth, Ulbricht, Mathias |
|---|---|
| Format: | Article PeerReviewed application/pdf |
| Terbitan: |
Elsevier
, 2008
|
| Subjects: | |
| Online Access: |
http://eprints.undip.ac.id/36376/1/separation_and_purif.pdf http://www.elsevier.com/locate/seppur/ http://eprints.undip.ac.id/36376/ |
Daftar Isi:
- This work describes the fouling b ehavior of polysaccharideâprotein mixture solutions by investigation of adsorptive and ultraï¬ltration fouling. Alginate, dextran, myoglobin and bovine serum albumin were used as model foulants. Three commercial poly(ether sulfone) (PES) ultraï¬ltration (UF) membranes with nominal cut-off of 10, 30 and 10 0 kg/mol and a PES-base d thin layer hydrogel composite (TLHC) membrane,synthesize d by photo-initiated graft copolymerization of poly(ethylene glycol) methacrylate (PEGMA) and having a cut-off of 10 kg/mol were used. The effects of pH, foulant concentration, ionic content and pro-portion of protein to polysaccharide in the solution on fouling we re investigated . The results showed that signiï¬cant water ï¬ux reductions and changes in membrane surface property were observed after static adsorption for PES membranes for all feed solution conditions. This water ï¬ux reduction decreased with increasing the pH of the solution. Addition of monovalent ions could either increase or decrease the water ï¬ux reduction. Synergistic effects between polysaccharide and protein with respect to forming a mixed fouling layer with stronger reduction of ï¬ux than for the individual solutes under the same conditions have also been verified for PES UF membranes. UF experiments using a stirred dead-end UF suggested that both reversible and irreversible fouling have contributed to the overall fouling. The antifouling efï¬ciency of the TLHC membrane with respect to both adsorptive and ultrafiltration fouling has been demonstrated for the strong foulant alginate as well as for polysaccharideâprotein mixtures.