自然沉降藻-菌共生絮凝体研究进展

Recent Advances in Naturally Settleable Microalgal-Bacterial Flocs

藻-菌共生系统可实现污水二、三级处理低成本运行,特别是还可将CO2捕捉、固定于藻类后用于可再生生物能源生产,是应用前景广阔的可持续污水处理技术。然而,占地面积大、处理能力低、处理效果不稳定和藻细胞采收成本高等限制了其大规模工程推广应用。究其根本原因主要是藻-水分离困难,因此筛选可自然沉降微藻是解决问题的关键。在此方面,可自然沉降藻-菌共生絮凝体研究受到国内外广泛关注。从藻-菌共生絮凝体富集培养方法出发,系统总结藻-菌共生絮凝体污水处理效果;揭示其对藻-菌系统处理能力的提升作用;讨论藻-菌相互作用关键新问题;探讨藻-菌共生絮凝体生物能源生产潜力;提出后续研发重点方向。

The microalgal-bacterial system can treatment, especially achieve CO2 capture and fixation and it is a sustainable wastewatcr treatment technology realize low cost secondary and tertiary wastewater on the algae for renewable bio-energy production, with broad prospect of application. However, its widespread application is still hindered by its large footprint, low treatment capacity, unstable treatment efficiency, high biomass harvesting cost and so on. All these limitations result from the difficulty in separating the biomass from the treated water. Therefore, it is the key to solve the problem to screen naturally settleable microalgae. In this regard, the study of naturally settleable microalgal-bacterial （MaB） flocs has been widely concerned at home and abroad. Started the MaB flocs, the typical treatment performance of the from introducing the methods for enrichment of MaB flocs system was summarized, the role of MaB flocs in enhancing the treatment capability was highlighted, the MaB interaction and the bio-energy potential of the MaB flocs were discussed, and the follow-up research and development direction was put forward.