近零排泥兼氧MBR气化除磷微生物特性及磷转化机制研究

Biological phosphorus removal was traditionally achieved by wasting P-rich sludge. In researches and practical applications, the phenomenon of phosphorus gasification in wastewater treatment systems has been found. The MBR system could achieve Discharge Standard of phosphorus under complete solids retention in the practical engineering. However, it is still unclear about phosphorus removal pathways and mechanisms, as well as its relationship with phosphorus gasification. This project intends to investigate phosphorous gasification key factors that affect the related microbial characteristics, propose the optimum process parameters, study related microbial kinetics, and reveal the internal mechanisms of gasification phosphorus, and reveal the phosphorus removal mechanisms based on material and energy transformation pathways analysis of phosphorus by constructing a facultative MBR process with near-zero sludge discharge and phosphorus gasification. The scientific significance of this project is to illustrate the phosphorus gasification mechanisms, material and energy transformation pathways in phosphorus removal of facultative MBR with near-zero sludge discharge. The results of this research project will provide theoretical basis to reveal the microbial properties, pathways and mechanisms of phosphorus removal in near-zero sludge discharge process. These results have practical significance for optimizing wastewater treatment process and improving efficiency.

传统生物除磷通过排放富磷污泥实现，而有研究及实际应用中发现污水处理系统中存在气化除磷现象，MBR在长期不排泥条件下出水水质中磷仍可稳定达标，但磷的转化机制与气化除磷间关系尚不清晰。本项目拟构建近零排泥条件下气化除磷兼氧MBR系统，通过深入研究系统中气化除磷微生物特性与关键影响因子，结合气化除磷微生物反应动力学及磷物质能量转化途径研究，揭示气化除磷及磷去除机理。本项目的科学意义在于阐明近零排泥MBR系统磷去除过程中气化除磷机制及物质能量转化途径。其研究结果为理清近零排泥或无排泥MBR中气化除磷微生物特性、磷去除途径及机理提供理论依据，对于优化水处理工艺、提升处理效能有较好的现实意义。

传统生物除磷通过排放富磷污泥实现，而有研究及实际应用中发现污水处理系统中存在气化除磷现象，MBR在长期不排泥条件下出水水质中磷仍可稳定达标，但磷的转化机制与气化除磷间关系尚不清晰。本项目构建近零排泥条件下气化除磷兼氧MBR系统，通过深入研究系统中气化除磷微生物特性，结合磷物质转化途径研究，基本揭示气化除磷及磷去除机理。本项目通过调整反应器内部溶解氧等运行参数驯化气化除磷类微生物，实现有机污泥不外排条件下处理出水总磷达到一级A排放标准；兼氧MBR系统MLSS可高达20g/L左右，系统污泥中磷含量未明显累积，通过物料衡算得出存在磷损失；监测显示密闭系统中有微量PH3产生，且高通量测序结果表明，系统含气化除磷功能的梭菌。本项目的科学意义在于阐明近零排泥MBR系统磷去除过程中气化除磷机制及物质转化途径。其研究结果为理清近零排泥或无排泥MBR中气化除磷微生物特性、磷去除途径及机理提供理论依据，对于优化水处理工艺、提升处理效能有较好的现实意义。