Harvesting of microalgal biomass: Efficient method for flocculation through pH modulation

被引：127
作者：
Ummalyma, Sabeela Beevi [1 ]
Mathew, Anil K. [1 ]
Pandey, Ashok [1 ]
Sukumaran, Rajeev K. [1 ]
机构：
[1] CSIR Natl Inst Interdisciplinary Sci & Technol, Ctr Biofuels, Div Biotechnol, Ind Estate PO, Trivandrum 695019, Kerala, India
来源：
BIORESOURCE TECHNOLOGY | 2016年 / 213卷
关键词：
Microalga; Chlorococcum; Flocculation; Biofuel; Algal cultivation; COAGULATION-FLOCCULATION; CHITOSAN FLOCCULATION; SCENEDESMUS-OBLIQUUS; ALGAE; CHLORIDE; IMPACT; AGENT; REUSE;
D O I：
10.1016/j.biortech.2016.03.114
中图分类号：
S2 [农业工程];
学科分类号：
0828 ;
摘要：
Harvesting of the micro alga Chlorococcum sp. R-AP13 through autoflocculation, chemical flocculants or by change in medium pH was evaluated. Surface charge of algal cells changed in response to the method used and affected flocculation efficiency. While aluminum sulfate and FeCl3 supported 87% and 92% efficiency, auto flocculation could recover 75% of biomass in 10 min. Maximum efficiency (94%) was obtained with change in medium pH from 8.5 to 12.0 achieved through addition of 40 mg l(-1) of NaOH. Since high concentrations of FeCl3 and AlSO4 were toxic to the cells, flocculation induced by pH change may be considered the most effective strategy. Residual medium after flocculation could be reused efficiently for algal cultivation, minimizing the demand for fresh water. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：216 / 221
页数：6
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