کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
638606 1456175 2007 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrically-enhanced crossflow microfiltration for separation of lactoferrin from whey protein mixtures
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Electrically-enhanced crossflow microfiltration for separation of lactoferrin from whey protein mixtures
چکیده انگلیسی

The effect of applying an external electrical field during lactoferrin (LF) and whey protein solutions microfiltration was studied. The impact of electrical field strength (0–3333 V m−1) and polarity on the permeation flux and protein transmission were investigated. The influence of LF iron saturation was also assessed. The electrically-enhanced membrane filtration (EMF) experiments were performed on a purpose-built flat-sheet module and operated in a full recirculation mode at low transmembrane pressure (0.7 × 105 Pa) and feed velocity (0.05 m s−1). The results showed that the application of an electrical field had an important impact on protein transmission. Selectivity enhancements were obtained, particularly when the cathode was on the retentate side. In that configuration (3333 V m−1), the separation factors obtained between LF and the two main whey proteins β-lactoglobulin (β-LG) and α-lactalbumin (α-LA) were, respectively, 3.0 and 9.1. Under those conditions, the electrical field increased permeation flux by a factor 3, suggesting an important decrease of membrane fouling. LF iron saturation also influenced its transmission under the electrical field and separation factors between holo-LF and β-LG or α-LA were, respectively, up to 6.7 and 62.4 at 1667 V m−1. This study shows the potential of EMF as regards LF fractionation in more complex fluids such as cheese whey.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volume 297, Issues 1–2, 5 July 2007, Pages 206–216
نویسندگان
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