自絮凝和目标微藻的比例会影响生物絮凝的节能收获。
Ratio between autoflocculating and target microalgae affects the energy-efficient harvesting by bio-flocculation.
机构信息
Bioprocess Engineering, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands.
出版信息
Bioresour Technol. 2012 Aug;118:49-55. doi: 10.1016/j.biortech.2012.05.007. Epub 2012 May 7.
The effect of ratio between autoflocculating and target microalgae in bio-flocculation was studied with emphasis on the recovery, sedimentation rate and energy demand for harvesting the target microalgae. When the autoflocculating microalgae Ettlia texensis, Ankistrodesmus falcatus and Scenedesmus obliquus were added to Chlorella vulgaris at a ratio of 0.25, the recovery of C. vulgaris increased from 25% to, respectively, 40%, 36% and 31%. The sedimentation rate increased as well. Addition of Tetraselmis suecica to Neochloris oleoabundans at a ratio of 0.25 increased the recovery from 40% to 50%. Application of bio-flocculation at a ratio of 0.25, followed by centrifugation reduces the energy demand for harvesting of the target microalgae from 13.8 MJ kgDW(-1) if only centrifugation is used to 1.83, 1.81, 1.53 and 1.34 MJ kgDW(-1), respectively, using T. suecica, E. texensis, A. falcatus and S. obliquus and 3h sedimentation before centrifugation.
研究了自絮凝微藻与目标微藻之间的比例对生物絮凝的影响，重点研究了目标微藻的回收、沉降速率和收获所需的能量。当将自絮凝微藻 Eutliamia texensis、Ankistrodesmus falcatus 和 Scenedesmus obliquus 分别以 0.25 的比例添加到小球藻（Chlorella vulgaris）中时，小球藻的回收率从 25%分别提高到 40%、36%和 31%。沉降速率也有所提高。将四角藻（Tetraselmis suecica）以 0.25 的比例添加到杜氏盐藻（Neochloris oleoabundans）中，回收率从 40%提高到 50%。采用 0.25 的生物絮凝比例，然后进行离心，可以将仅离心所需的收获目标微藻的能量需求从 13.8 MJ kgDW(-1)降低到 1.83、1.81、1.53 和 1.34 MJ kgDW(-1)，分别使用四角藻、Eutliamia texensis、Ankistrodesmus falcatus 和 Scenedesmus obliquus，以及离心前 3 小时的沉降。
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