Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, St Lucia, Queensland 4072, Australia.
School of Chemical Engineering, The University of Queensland, St Lucia, Queensland 4072, Australia.
Bioresour Technol. 2014 May;159:437-41. doi: 10.1016/j.biortech.2014.03.030. Epub 2014 Mar 15.
Microalgae harvesting by air flotation is a promising technology for large-scale production of biofuel, feed and nutraceuticals from algae. With an adherence-to-hydrocarbon method and two different types of flotation cells (mechanically agitated cell and Jameson cell), microalgal surface hydrophobicity and bubble size were identified to be critical for effective froth flotation of microalgae. Freshwater alga Chlorella sp. BR2 showed naturally a high hydrophobicity and an ideal response to flotation. However, many marine microalgae possess a low surface hydrophobicity and are thus difficult to harvest. This paper shows that a step-wise optimization approach can substantially improve the flotation of a low surface hydrophobicity marine microalga, Tetraselmis sp. M8, to near full recovery with an enrichment ratio of 11.4.
空气浮选法是一种很有前途的技术，可用于从藻类中大规模生产生物燃料、饲料和营养保健品。采用附着烃类的方法和两种不同类型的浮选槽（机械搅拌槽和 Jameson 槽），确定了微藻的表面疏水性和气泡大小对于微藻有效泡沫浮选至关重要。淡水藻小球藻 BR2 表现出天然的高疏水性，对浮选有理想的响应。然而，许多海洋微藻的表面疏水性很低，因此难以收获。本文表明，逐步优化方法可以显著提高低表面疏水性海洋微藻三角褐指藻 M8 的浮选效果，使其接近完全回收，富集比达到 11.4。
