当前位置： SCI文献检索 > INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES期刊下所有文献 > Concentration of rutin model solutions from their mixtures with glucose using ultrafiltration.

Concentration of rutin model solutions from their mixtures with glucose using ultrafiltration.

Abstract：

:Separation of polyphenolic phytochemical compounds from their mixtures with sugars is necessary to produce an added-value sugar-reduced extract with high biological activity from fruit juice processing industry waste streams. The separation characteristics of a binary mixture of rutin and glucose using a Pellicon-2 regenerated cellulose ultrafiltration membrane with an area of 0.1 m(2) having nominal MWCO of 1,000 Da were investigated, to demonstrate the separation of phenolic compounds from sugars. The effects of the operating variables-transmembrane pressure, feed solution temperature and pH, initial feed concentration and feed flow rate-on the permeate flux and enrichment of rutin, were determined. The permeate flux increased with the increase in transmembrane pressure up to a certain limit and after that the flux remained more or less constant. The optimum transmembrane pressure was within 4-5 bar. The flux increased with the increase in feed solution temperature because of reduced feed viscosity, and better solubility. The concentration of rutin was optimum at lower temperature (30 degrees C), with an enrichment factor of 1.3. The effect of pH on permeate flux was less obvious. Lowering the feed solution pH increased the retention of rutin and the optimum separation was obtained within pH 3-4. The permeate flux decreased with the increase in feed concentration of rutin (concentration range 0.1-0.5 g/L). The enrichment of rutin was significant in the glucose concentration range 0.35-0.5 g/L. The feed flow rate had a significant effect on the flux and separation characteristics. Higher cross-flow through the membrane reduced the fouling by providing a shear force to sweep away deposited materials from the membrane surface. At high feed flow rate, more rutin was retained by the membrane with less sugar permeating through. The optimum feed flow rate was 1.5 L/min. For the separation of rutin (in the retentate) and glucose (in the permeate), the best results were obtained at rutin enrichment of 2.9 and recovery 72.5%, respectively. The performance of this system was further improved by operating it in a diafiltration mode, in which only approx. 11% of glucose remained in the retentate.

journal_name

Int J Mol Sci

journal_title

International journal of molecular sciences

authors

Wei S,Hossain MM,Saleh ZS

doi

10.3390/ijms11020672

subject

Has Abstract

pub_date

2010-02-09 00:00:00

pages

672-90

issue

issn

1422-0067

journal_volume

pub_type

杂志文章

在线工具

Concentration of rutin model solutions from their mixtures with glucose using ultrafiltration.