一种通过共絮凝/气浮法收获小球藻的新方法。
A novel method to harvest Chlorella sp. by co-flocculation/air flotation.
作者信息
Zhang Haiyang, Lin Zhe, Tan Daoyong, Liu Chunhua, Kuang Yali, Li Zhu
机构信息
Key Laboratory of Solid Waste Treatment and Resource Recycle Ministry of Education, Southwest University of Science and Technology, Mianyang, 621010, Sichuan, China.
School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
出版信息
Biotechnol Lett. 2017 Jan;39(1):79-84. doi: 10.1007/s10529-016-2219-8. Epub 2016 Sep 21.
OBJECTIVES
To develop a more effective dissolved air flotation process for harvesting microalgae biomass, a co-flocculation/air flotation (CAF) system was developed that uses an ejector followed by a helix tube flocculation reactor (HTFR) as a co-flocculation device to harvest Chlorella sp. 64.01.
RESULTS
The optimal size distribution of micro-bubbles and an air release efficiency of 96 % were obtained when the flow ratio of inlet fluid (raw water) to motive fluid (saturated water) of the ejector was 0.14. With a reaction time of 24 s in the HTFR, microalgae cells and micro-bubbles were well flocculated, and these aerated flocs caused a fast rising velocity (96 m/h) and high harvesting efficiency (94 %).
CONCLUSIONS
In a CAF process, micro-bubbles can be encapsulated into microalgae flocs, which makes aerated flocs more stable. CAF is an effective approach to harvesting microalgae.
目的
为开发一种更有效的用于收获微藻生物质的溶气气浮工艺，开发了一种共絮凝/气浮（CAF）系统，该系统使用喷射器，随后是螺旋管絮凝反应器（HTFR）作为共絮凝装置来收获小球藻64.01。
结果
当喷射器的入口流体（原水）与驱动流体（饱和水）的流量比为0.14时，获得了最佳的微气泡尺寸分布和气释放效率96%。在HTFR中反应时间为24秒时，微藻细胞和微气泡得到了良好的絮凝，这些充气絮凝物导致快速上升速度（96米/小时）和高收获效率（94%）。
结论
在CAF工艺中，微气泡可以包裹在微藻絮凝物中，这使得充气絮凝物更稳定。CAF是收获微藻的有效方法。
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