Abstract:

Excessive discharge of phosphorus into the water environment endangers the environment and human health, and is also a waste of phosphorus resources. The use of microalgae to remove phosphorus from sewage, as an advanced sewage treatment method, which can recover resources, has received extensive attention from scholars. However, the current research has not uncovered the whole picture of the phosphorus removal mechanism of microalgae, and has not developed the full phosphorus removal potential of microalgae. In this paper, the advantages of phosphorus removal by microalgae were reviewed. Based on the existing research results, the mechanism of phosphorus removal by microalgae was discussed. The “phosphorus pool” state and “phosphorus flow” direction in the process of phosphprus removal by microalgae were mainly clarified, and the advantages and disadvantages of microalgae in phosphorus removal by various cultivation methods were summarized. In terms of mechanism, the phosphorus removal by microalgae was the result of the joint action and competition of the four phosphorus removal mechanisms, including biomass synthesis, chemical precipitation, excessive absorption and surface adsorption. In terms of process mode, the symbiotic mode of algae and bacteria and the nutritional mode of photosynthetic mixotrophic were the better choices for the current phosphorus removal process of sewage by microalgae.

Key words: sewage treatment, phosphorus removal by microalgae, cultivation method, biofuels, mechanism of phosphorus removal

摘要：

向水环境排放过多的磷会危害环境和人体健康，同时导致磷资源的浪费。微藻除磷作为一种可以回收资源的污水深度处理方式，受到了国内外学者的广泛关注。然而，目前的研究还未揭开微藻除磷机理的全貌，也未开发出微藻的全部除磷潜力。对微藻除磷的优势进行了综述，基于现有研究成果论述了微藻除磷的机理，重点阐明了微藻除磷过程中“磷库”状态和“磷流”方向，并总结了微藻各种培养方式在除磷方面的优势与弱点。微藻除磷从机理上看，是生物质合成、化学沉淀、过量吸收和表面吸附这4种除磷机制共同作用和互相竞争的结果；从工艺模式上看，藻菌共生模式及光合兼养的营养模式是当前污水微藻除磷工艺的较佳选择。

关键词: 污水处理, 微藻除磷, 培养方式, 生物燃料, 除磷机理

CLC Number: 

• X703