污水处理系统中有机磷的形成机制及强化去除

The traditional advanced phosphorus removal processes of wastewater treatment plants (WWTPs) achieve efficient removal of inorganic phosphorus, but fail to effectively remove organic phosphorus, which results in considerable residue of organic phosphorus in the effluent. The residue organic phosphorus has become one of the key factors that limit the deep reduction of total phosphorus in the effluent. Therefore, illuminating the formation and variation of organic phosphorus in the WWTPs and enhancing its removal are crucial for the deep reduction of total phosphorus in the effluent. This project intends to investigate the organic phosphorus in the WWTPs. Firstly, the analytical methods of low concentration organic phosphorus would be established. Based on this, the formation and variation of organic phosphorus in different activated sludge treatment processes and different treatment units would be explored. In addition, the key process parameters affecting the formation and variation of organic phosphorus in the activated sludge reactor and related mechanisms would be clarified. Finally, the transformation and deep removal of organic phosphorus in the effluent in the advanced treatment processes such as coagulation and adsorption would be investigated. The influences of molecular characteristics on its deep removal and related mechanisms would be further elucidated to develop highly efficient deep removal processes for organic phosphorus. The research of this project will help to understand the formation mechanism of organic phosphorus in the WWTPs and provide certain scientific basis and technical support for strengthening the removal of organic phosphorus in the effluent.

污水处理厂传统的深度除磷手段对无机磷具有较好的去除效果，而对有机磷的去除效果较差，这导致出水中有相当部分的有机磷残留，有机磷残留已成为限制出水中总磷深度削减的关键因素之一。因此，明晰污水处理系统中有机磷的形成及变化规律并强化其去除，对出水中总磷的深度削减至关重要。本项目拟以污水处理系统中的有机磷为研究对象，首先建立低浓度有机磷的分析表征方法；在此基础上，探索不同活性污泥处理工艺和不同处理单元中有机磷的形成及变化规律，弄清活性污泥反应器中影响有机磷形成和变化的关键工艺参数及相关机制；最后考察在混凝、吸附等深度处理工艺中，出水中有机磷的转化和深度去除规律，探索有机磷分子特征对其深度处理的影响及作用机制，针对性地发展出水有机磷的高效深度去除工艺。本项目的研究将有助于理解有机磷在污水处理系统中的形成机制并为强化出水中有机磷的去除提供一定的科学依据和技术支持。

污水处理厂传统的深度除磷手段对无机磷具有较好的去除效果，而对有机磷的去除效果较差，这导致出水中有相当部分的有机磷残留，有机磷残留已成为限制出水中总磷深度削减的关键因素之一。因此，探明污水处理系统中有机磷的形成及转化规律并发展其强化去除方法，对出水中总磷的深度削减至关重要。本项目以污水处理系统中的有机磷为研究对象，建立了表征污水中低浓度有机磷分子组成的方法；基于该方法，探明了污水处理系统各单元中有机磷的形成及转化规律，并揭示了出水中颗粒态有机磷在受纳水体中的光转化行为与机制；发展了原位氧化耦合混凝强化去除出水有机磷的方法，开发了稳定、可循环利用的纳米磷酸酶，实现了出水有机磷的高效水解去除。本项目的研究成果为污水处理厂实现有机磷的深度削减提供了一定的指导。