Microalgae separation by inertia-enhanced pinched flow fractionation
Microalgae separation by inertia-enhanced pinched flow fractionation
复制标题
通过惯性增强夹流分级分离微藻
DOI：
10.1002/elps.202000325
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发表时间：
2021-05-22
期刊：
影响因子：
2.9
通讯作者：
Pan, Xinxiang
中科院分区：
文献类型：
--
作者：
Wang, Saijie;Liu, Zhijian;Pan, Xinxiang
为了提高船舶压载水检测的准确性和效率，按大小分离微藻具有重要意义。报道了一种基于惯性强化夹带流动分离(IPFF)的微藻分离方法。该方法利用水流产生的惯性升力，连续按大小分离微藻。实验结果表明，随着雷诺数的增加，分离效果先变好，然后保持不变。雷诺数为12.3时，分离效果最佳。另外，随着鞘液与微藻混合物流量比的增大，分离效果变好，当流量比达到10时分离效果最好，此时四季藻的回收率最高。小球藻的纯度约为86%，小球藻的回收率约为90%。高达99%，纯度约为99%。在此之后，分离效果不断改善，但速度非常缓慢。总之，本研究为不同大小微藻的分离提供了一种简便的方法，为准确检测压载水中的微藻奠定了基础。
To improve the accuracy and efficiency of ships' ballast water detection, the separation of microalgae according to size is significant. In this article, a method to separate microalgae based on inertia-enhanced pinched flow fractionation (iPFF) was reported. The method utilized the inertial lift force induced by flow to separate microalgae according to size continuously. The experimental results show that, as the Reynolds number increases, the separation effect becomes better at first, but then stays unchanged. The best separation effect can be obtained when the Reynolds number is 12.3. In addition, with the increase of the flow rate ratio between sheath fluid and microalgae mixture, the separation effect becomes better and the best separation effect can be obtained when the flow rate ratio reaches 10. In this case, the recovery rate of Tetraselmis sp. is about 90%, and the purity is about 86%; the recovery rate of Chlorella sp. is as high as 99%, and the purity is about 99%. After that, the separation effect keeps getting better but very slowly. In general, this study provides a simple method for the separation of microalgae with different sizes, and lays a foundation for the accurate detection of microalgae in the ballast water.