Effect of high or low molecular weight of components of feed on transmembrane flux during forward osmosis.

Chetan Nayak, A. and Valluri, Satya Sriram and Rastogi, Navin K. (2011) Effect of high or low molecular weight of components of feed on transmembrane flux during forward osmosis. Journal of Food Engineering, 106. pp. 48-52.

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Abstract

The possible mechanism of water transport from feed to osmotic agent side during forward osmosis in situation when feed contains high or low molecular weight compounds and their combination has been presented. The orientation of membrane was found to influence the transmembrane flux. When the feed contains mixture of low and high molecular weight compounds mode I (feed towards the support layer) was found to result in lower flux values as compared to Mode II (feed towards active layer) due to significant external concentration polarization. Forward osmosis resulted in the concentration of betalains content in beetroot juice and anthocyanin content in grape juice from 50.92 mg/L to 2.91 g/L (57.1 fold) and from 104.85 mg/L to 715.6 mg/L (6.8 fold), respectively. Total soluble solids in case of beetroot, grape and pineapple juice were found to increase from 2.3 to 52 �Brix, from 8.0 to 54.6 �Brix from 4.4 to 54 �Brix, respectively.

Item Type:	Article
Uncontrolled Keywords:	Forward osmosis; Pineapple juice; Anthocyanin Betalains; Concentration polarization
Subjects:	600 Technology > 07 Beverage Technology > 05 Fruit juice 600 Technology > 08 Food technology > 05 Processing and Engineering
Divisions:	Food Engineering
Depositing User:	Food Sci. & Technol. Information Services
Date Deposited:	08 Aug 2011 09:00
Last Modified:	28 Dec 2011 10:28
URI:	http://ir.cftri.res.in/id/eprint/10426

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