This study focused on the problem that simultaneous nitrogen and phosphorus removal cannot be achieved in current urban sewage treatment systems. To address this, a pilot system was developed to first use immobilized biologically active fillers to remove nitrogen, and then use activated sludge to independently remove phosphorus. The goal was to maximize the effectiveness of biological phosphorus removal. This study mainly aimed at analyzing the post-independent phosphorus removal characteristics and mechanisms; the composition of the phosphorus removing bacteria; and the contribution rate of the system. The effluent PO₄^3--P of the system remained stable at 0.15–0.2 mg L⁻¹, with the phosphorus removal anaerobic tank maintaining a "micro-release" state. When the hydraulic retention time (HRT) of the aerobic phosphorus removal tank was reduced to 1 h, the contribution rate of the aerobic phosphorus removal bacteria decreased from 28.42% to 16.68%; the contribution rate of the denitrifying phosphorus removal bacteria increased from 72.58% to 83.32%; and the abundance of the dominant bacteria Dechloromonas and Thaurea significantly increased. The phosphorus removal system provides a new approach for deep phosphorus removal in main municipal wastewater systems.

本研究主要针对目前城市污水处理系统无法实现同时脱氮除磷的问题。为了解决这个问题，开发了一个试点系统，首先使用固定化生物活性填料去除氮，然后使用活性污泥独立去除磷。目标是最大限度地提高生物除磷的有效性。本研究主要针对后独立除磷特性及机理进行分析；除磷菌的组成；和系统的贡献率。系统出水PO ₄ ^3- -P 稳定在0.15-0.2 mg  L ^-1，除磷厌氧池保持“微释”状态。当好氧除磷池的水力停留时间（HRT）降低到1 h时，好氧除磷菌的贡献率从28.42%下降到16.68%；反硝化除磷菌贡献率由72.58%提高到83.32%；优势菌Dechloromonas和Thaurea的丰度显着增加。除磷系统为主要市政污水系统的深度除磷提供了一种新途径。