Characterization and fouling properties of exopolysaccharide produced by Klebsiella oxytoca

被引：16

作者：

Feng, Lei ^{[1
,2
]}

Li, Xiufen ^{[1
]}

Du, Guocheng ^{[3
]}

Chen, Jian ^{[4
]}

机构：

[1] Jiangnan Univ, Lab Environm Biotechnol, Sch Environm & Civil Engn, Wuxi 214122, Jiangsu Prov, Peoples R China

[2] Fujian Agr & Forestry Univ, Resource & Environm Coll, Fuzhou 350002, Fujian Province, Peoples R China

[3] Jiangnan Univ, Sch Biotechnol, Wuxi 214122, Jiangsu Prov, Peoples R China

[4] Jiangnan Univ, Natl Key Lab Food Sci & Technol, Wuxi 214122, Jiangsu Prov, Peoples R China

来源：

BIORESOURCE TECHNOLOGY | 2009年 / 100卷 / 13期

基金：

中国国家自然科学基金;

关键词：

Klebsiella oxytoca; Exopolysaccharide; Biofouling; Microfiltration; Resistances; EXTRACELLULAR POLYMERIC SUBSTANCES; CROSS-FLOW FILTRATION; WASTE-WATER; AQUEOUS-SOLUTIONS; PORE BLOCKAGE; MEMBRANE; ULTRAFILTRATION; MICROFILTRATION; MODEL; PERFORMANCE;

D O I：

10.1016/j.biortech.2009.02.016

中图分类号：

S2 [农业工程];

学科分类号：

082806 [农业信息与电气工程];

摘要：

Klebsiella oxytoca produced a type of exopolysaccharide (EPS) with the average molecular weight (Mw) of 116,018 Da and the average size of 260 nm. The EPS rnonosaccharide components contained rhamnose, fucose, arabinose, xylose, mannose, galactose and glucose and the molar ratio among them was 0.033:0.0411:0.0147:0.0051:0.2393:0.0986:0.1304. Typical EPS absorption peaks in FT-IR spectrum and pseudoplastic properties were also revealed. The polyvinylidenefluoride (PVDF) membrane showed a relatively larger flux decline resulted from the EPS fouling. The EPS filtration was dominated by more than one mechanism at the beginning phase and mainly by the cake formation at the later phase for both membranes. The pore blocking resistance had a predominant contribution to the filtration resistance and the cake resistance played a secondary role for both the membranes. The EPS adsorption resulted in a weak membrane fouling. The PVDF membrane exhibited a larger adsorption resistance than the polypropylene (PP) membrane. (C) 2009 Published by Elsevier Ltd.

引用

页码：3387 / 3394

页数：8

共 33 条

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Analysis and glycosyl composition of the exopolysaccharide isolated from the floc-forming wastewater bacterium Thauera sp MZ1T [J].