A NEW COMPLEX BIOFLOCCULANT PRODUCED BY MIX-STRAINS IN ALCOHOLIC WASTEWATER AND THE CHARACTERISTICS OF THE BIOFLOCCULANT

文献类型： 外文期刊

第一作者： Wang, Xiangdong

作者： Wang, Xiangdong;Wang, Yina;Zhang, Wang;Chen, Jiao;Zhang, Fan;Xiao, Jun;Huang, Juan

作者机构：

关键词： alcoholic wastewater;complex bioflocculant;characteristics;mix-strains, optimal culture conditions

期刊名称：FRESENIUS ENVIRONMENTAL BULLETIN （ 影响因子：0.489； 五年影响因子：0.479 ）

ISSN： 1018-4619

年卷期： 2011 年 20 卷 9 期

页码：

收录情况： SCI

摘要： Alcoholic wastewater was used as culture medium to biosynthesize bioflocculant after some bioflocculant-producing strains were isolated from activated sludge in a wastewater treatment plant. Two strains with the highest flocculating rates were identified as Bacillus cereus and Pichia membranifaciens. The highest flocculating rate of mix-strains was up to 88.0% within 24 hours, and the bioflocculant production period of mix-strains was only half the time compared to that associated with a single strain. The optimal culture conditions of mix-strains were studied, and the bioflocculant was produced under these conditions. The bioflocculant had characteristics of polysaccharides and its total polysaccharide content was up to 63.4% (w/w). The homogeneous monosaccharide in it was glucose with a concentration of 40.1% (w/w) of polysaccharides. However, the total protein was only 0.87% (w/w). The bioflocculant was thermo-stable and its molecular weight was 50798 Da. The bond between the bioflocculant and kaolin granule was an electrovalent bond, and bridging effect occurred during the process of flocculating.

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