基于胞内聚合物的短程硝化与反硝化除磷偶联机制研究

The lack of carbon source during biological nitrogen and phosphorus removal is one of the main factors restricting the operation and development of municipal wastewater treatment plants. The coupling of shortcut nitrification and denitrification phosphorus removal induced by intracellular polymers provides a new approach to solve the shortage of carbon source in the denitrification process. However, the related coupling mechanism is still not clear. Therefore, in this project, the biological nitrogen and phosphorus removal system will be constructed by coupling the accumulation and transformation of intracellular polymers with shortcut nitrification and denitrifying phosphorus removal, and the coupling mechanism of shortcut nitrification and denitrifying phosphorus removal induced by intracellular polymers will be studied. We will explore the optimal control conditions for the process of biological nitrogen and phosphorus removal induced by intracellular polymers. The microbial community structure characteristics and the metabolic pathway of intracellular polymers will also be investigated, and the coupling of intracellular polymers and biological nutrient removal will also be discussed. The research results of this project will enrich the theory of biological nitrogen and phosphorus removal, and provide theoretical basis and technical support for the engineering application of the technology.

污水生物脱氮除磷过程中的碳源不足问题是制约城市污水处理厂运行与发展的主要因素之一。基于胞内聚合物积累/转化的短程硝化与反硝化除磷偶联体系为解决反硝化过程需投加有机碳源的难题提供了新思路，但相关的偶联机制尚不清楚。本项目拟通过将胞内聚合物的积累/转化与短程硝化及反硝化除磷进行偶联构建生物脱氮除磷系统，研究基于胞内聚合物的短程硝化与反硝化除磷偶联作用机制，包括：获得不同基质条件下基于胞内聚合物的短程硝化与反硝化除磷过程的最佳控制条件，解析微生物群落结构特征与胞内聚合物的代谢途径，并探寻胞内聚合物代谢过程与氮磷元素转化的偶联规律。研究成果将丰富污水生物脱氮除磷理论，并为该技术的工程应用提供理论依据与技术支撑。

本项目获得资助后按计划实施，顺利完成预期研究目标。主要研究内容为：探究了不同基质条件下基于内聚物的短程硝化与反硝化除磷过程最佳控制条件；较全面地解析了微生物群落结构特征与胞内聚合物的代谢途径；分析了内聚物代谢过程与氮磷元素转化的偶联规律，从而获得基于内聚物积累/转化的短程硝化与反硝化除磷偶联机制。研究成果在国际权威学术期刊发表SCI论文10篇，进一步丰富了污水生物脱氮除磷理论，并为该技术的工程应用提供了理论依据与技术支撑。