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FLUX PROFILES AND MATHEMATICAL MODELING OF FOULING MECHANISM FOR ULTRAFILTRATION OF KONJAC GLUCOMANNAN


NITA ARYANTI 1*, DYAH H. WARDHANI 1, SUPANDI SUPANDI 2
1. Diponegoro University, Department of Chemical Engineering, Kampus Undip Tembalang, Semarang, Indonesia
2. Universitas PGRI Semarang, Department of Mathematics Education, Faculty of Mathematics, Science and Information Technology, Jl. Sidodadi Timur no 24, Semarang, Indonesia
*Corresponding author: nita.aryanti@che.undip.ac.id

Issue:

SCSCC6, Volume XVII, No. 2

Section:

Volume 17, No. 2 (2016)

Abstract:

This study was focused on principles and fouling analysis of konjac glucomannan (KGM) separation using ultrafiltration system. Two Polyethersulfone membranes (PES) having molecular weight cut-off of 10 and 20 kDa were used. It was found that membrane having larger pore size provided higher flux profiles. Evaluation of different transmembrane pressures resulted on possibility of more severe fouling at higher membrane pressure. With the increase of konjac glucomannan concentration, decrease of profile flux was observed. Further, a simple mathematical modelling of fouling mechanism was analyzed based on Hermia’s model. The images of membrane surfaces and cross-sections obtained by scanning electron microscopy (SEM) were examined and being compared with the model. The research found that the fouling mechanisms of KGM ultrafiltration using membrane with pore size of 10 kDa was complete blocking. On the contrary, cake/gel layer formation was a fouling mechanism for ultrafiltration system with pore size of 20kDa.

Keywords:

konjac glucomannan, ultrafiltration, polyethersulfone membranes, fouling mechanism, mathematical modelling.

Code [ID]:

CSCC6201602V02S01A0002 [0004418]

Full paper:

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