藻菌共生强化驱动典型养殖废水生境中磷素循环机制与调控原理

作为地表水首要污染因子和面临枯竭的重要战略资源，废水中磷素的脱除与回收受到日益关注。微藻具有超强聚磷能力，新近被证实是历史上驱动磷矿形成的重要物种。实际水生系统中，微藻和菌类常同时存在并占据极为重要的生态位，因此，研究藻菌共生驱动的废水磷循环具有十分明显的现实意义。本项目选取前期已证实能稳定共生且有更强磷素驱动力的黄丝藻和嗜氨基杆菌等为试验生物，以典型富磷废水畜禽养殖废水为试验水体，构建藻菌共生强化驱动废水磷循环体系；从生物吸附、同化吸收、化学沉淀等角度考察其中的磷素迁移转化途径，从主要水体理化因子和环境因子等方面识别影响磷循环和藻菌互作的关键因子及作用机制；最后，构建系统磷物质流模型，分析提出旨在磷污染防治与资源化的调控原理。本项目的完成能够为其他微生物驱动污染生境磷素循环机制的深入研究提供理论依据，为利用藻菌共生驱动废水磷素污染防治和资源化应用提供科学指导。

As the primary pollution factor of water and an important strategic resource facing depletion, the removal and recovery of phosphorus in wastewater have been paid more and more attention. Microalgae have a strong ability of phosphorus accumulation, which has recently been proved to be an important species driving the formation of phosphate rock in history. In the actual aquatic system, microalgae and bacterias often exist synchronously and occupy very important ecological niches. Therefore, it is of great practical significance to study the phosphorus cycle of wastewater driven by the agal-bacterial consortia. In this project, the filamentous algae Tribonema sp. and actinobacterium Aminobacter aminovorans which have been proved to be stable symbiosis and have stronger driving force of phosphorus are selected as experimental organisms, and the typical phosphorus-rich livestock and poultry wastewater are taken as experimental water body to construct the algal-bacterial symbiosis enhanced driving wastewater phosphorus cycle system; the phosphorus transfer and transformation ways are investigated from the perspective of biosorption, assimilation, and absorption, chemical precipitation, etc., and the physi-chemical reasons of the main water are analyzed The key factors and mechanism that affect the phosphorus cycle and the algal-bacterial interactions were identified from the aspects of physi-chemical and environmental aspects. Finally, the system phosphorus material flow model was constructed, and the control principle for phosphorus pollution control and resource utilization was analyzed. The completion of this project can provide a theoretical basis for the further study of phosphorus cycle mechanism in other microbial driven polluted habitats, and provide scientific guidance for the use of phosphorus pollution control and resource-based application of algal-bacterial consortia.