利用絮凝进行微藻采收的研究进展

Harvesting microalgae via flocculation: a review

摘要:

微藻可生产不饱和脂肪酸及色素等多种高附加值产品，同时也可用来生产可再生清洁能源如生物柴油等，具有良好的应用前景。但是，目前微藻细胞的采收成本高居不下，已成为限制微藻生物技术大规模应用的重要因素之一。与其他方法相比，絮凝采收成本低、操作简便，是很有应用前景的采收方法。本文综述了国内外利用化学絮凝、物理絮凝及生物絮凝等方法对不同微藻细胞进行采收的研究，重点对生物絮凝方法进行了总结。利用微生物絮凝剂及微藻细胞的自絮凝进行微藻生物量的回收，是微藻采收技术中环境友好、低成本和行之有效的新方法之一。

Abstract:

Microalgae have been identified as promising candidates for biorefinery of value-added molecules. The valuable products from microalgae include polyunsaturated fatty acids and pigments, clean and sustainable energy (e.g. biodiesel). Nevertheless, high cost for microalgae biomass harvesting has restricted the industrial application of microalgae. Flocculation, compared with other microalgae harvesting methods, has distinguished itself as a promising method with low cost and easy operation. Here, we reviewed the methods of microalgae harvesting using flocculation, including chemical flocculation, physical flocculation and biological flocculation, and the progress and prospect in bio-flocculation are especially focused. Harvesting microalgae via bio-flocculation, especially using bio-flocculant and microalgal strains that is self-flocculated, is one of the eco-friendly, cost-effective and efficient microalgae harvesting methods.