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
作者： Zhang, Fan 2 ; Jiang, Wenju 1 ; Wang, Xiangdong 1 ; Huang, Juan 3 ; Xiao, Jun 2 ; Wang, Yina 1 ; Zhang, Wang 1 ; Chen, Ji 1 ;
作者机构： 1.Sichuan Univ, Coll Architecture & Environm, Chengdu 610065, Sichuan, Peoples R China
2.Sichuan Acad Agr Sci, Inst Plant Protect, Chengdu 610066, Sichuan, Peoples R China
3.Sichuan Univ, Coll Life Sci, Chengdu 610065, Sichuan, Peoples R China
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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