微藻处理污水中的絮凝分离/采收研究现状与展望

微藻应用于污水深度处理与可再生能源生产是极具潜力的一项技术.然而,微藻的分离与采收一直是限制其大规模应用的瓶颈.絮凝分离微藻成本低廉、易于采收而被视为极具工程应用潜力的最佳方法.本文从对微藻表面特性和絮凝机理简要介绍出发,系统总结了无机絮凝剂法、有机高分子絮凝剂法、生物絮凝剂法、高p H诱导的自絮凝法以及胞外聚合物引起的自絮凝法的研究应用现状,进而对各种方法进行综合比较,从而明确了微藻絮凝分离的研发方向.

Current status and outlook of microalgae flocculation in wastewater treatment

Application of microalgae in advanced wastewater treatment and renewable energy production is a promising technology. However, its industrial application has been largely hindered with the difficulty in biomass separation & harvesting. With low cost and high efficiency, flocculation has been regarded as a superior method to separate and harvest microalgae biomass from micro-algal suspension. Getting started with a brief introduction on the physico-chemical surface properties of microalgae and the flocculation fundamentals, a comprehensive review on different flocculation methods (inorganic flocculants, organic flocculants, bio-flocculants, high-pH induced autoflocculation and EPS-induced autoflocculation) was conducted in this paper. By comparing different flocculation methods, the trend in microalgae flocculation was identified and future research needs were highlighted.