通过阳离子淀粉的生物絮凝作用有效收获小球藻 Chlorella protothecoides。
Effective harvesting of the microalgae Chlorella protothecoides via bioflocculation with cationic starch.
机构信息
Department of Environmental Engineering, Technical University of Denmark, Bg 113, 2800 Lyngby, Denmark.
Department of Environmental Engineering, Technical University of Denmark, Bg 113, 2800 Lyngby, Denmark.
出版信息
Bioresour Technol. 2014 Sep;167:214-8. doi: 10.1016/j.biortech.2014.06.014. Epub 2014 Jun 14.
In the present work, the flocculation efficiency of cationic starch (Greenfloc 120) was tested on the fresh water microalga Chlorella protothecoides under different conditions (pH and flocculant concentrations). Different concentrations of Greenfloc 120 (0, 2.5, 5, 10, 20, 40 mg L(-1)) were screened against different algal densities (0.44, 0.56 and 0.77 g L(-1)). Once the optimal flocculation concentration had been established (40 mg L(-1) for all different biomasses densities) a more detailed analysis was performed in order to investigate if different pH (4.0, 7.7, and 10.0) could increase the flocculation efficiency of cationic starch. Highest flocculation efficiency without addition of Greenfloc 120 was obtained at pH 10, while in the presence of flocculant, the efficiency increased for all the tested pH values, with a maximum of 98% for pH 7.7 and 10. Cationic starch confirmed to be as an easy to use, efficient and cost-effective flocculant for harvesting of microalgae.
在本工作中，在不同条件（pH 和絮凝剂浓度）下测试了阳离子淀粉（Greenfloc 120）对新鲜淡水微藻小球藻的絮凝效率。筛选了不同浓度的 Greenfloc 120（0、2.5、5、10、20、40 mg L(-1)) 对抗不同藻密度（0.44、0.56 和 0.77 g L(-1))。一旦确定了最佳絮凝浓度（所有不同生物量密度均为 40 mg L(-1))，就进行了更详细的分析，以研究不同 pH（4.0、7.7 和 10.0）是否可以提高阳离子淀粉的絮凝效率。在不添加 Greenfloc 120 的情况下，最高的絮凝效率在 pH 10 时获得，而在存在絮凝剂的情况下，所有测试的 pH 值的效率都增加了，在 pH 7.7 和 10 时达到最高的 98%。阳离子淀粉被证实是一种易于使用、高效且具有成本效益的微藻收获絮凝剂。
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