采用好氧颗粒污泥进行高级低强度废水处理、侧流磷回收和原位污泥减量。
Advanced low-strength wastewater treatment, side-stream phosphorus recovery, and in situ sludge reduction with aerobic granular sludge.
机构信息
Hunan Engineering Research Center of Water Security Technology and Application, College of Civil Engineering, Hunan University, Changsha 410082, China; Key Laboratory of Building Safety and Energy Efficiency, Ministry of Education, Hunan University, Changsha 410082, China.
Hunan Engineering Research Center of Water Security Technology and Application, College of Civil Engineering, Hunan University, Changsha 410082, China.
出版信息
Bioresour Technol. 2023 Oct;386:129574. doi: 10.1016/j.biortech.2023.129574. Epub 2023 Jul 26.
Modern paradigm has upgraded wastewater treatment plants (WWTPs) to water resources recovery facilities (WRRFs), where aerobic granular sludge (AGS) is a sewage treatment technology with promising phosphorus recovery (PR) potential. Herein, the AGS-based simultaneous nitrification, denitrification, and phosphorus removal coupling side-stream PR process (AGS-SNDPRr) was developed with municipal wastewater. Results revealed that AGS always maintained good structural stability, and pollutant removal was unaffected and effective after 40 days of anaerobic phosphorus-rich liquid extraction (fixed rate of 30%). The AGS-SNDPRr achieved a stable phosphorus recovery efficiency of 63.40%, and the side-stream PR further exaggerated in situ sludge reduction by 7.7-10%. Apart from responses of extracellular polymeric substances (EPS), the Matthew effect of typical denitrifying glycogen accumulating organisms (DGAOs) Candidatus_Competibacter up to 67.40% mainly contributed to enhanced performance of this new process. This study demonstrated a new approach for simultaneous advanced wastewater treatment, phosphorus recovery, and excess sludge minimization.
现代模式将污水处理厂（WWTP）升级为水资源回收设施（WRRF），其中好氧颗粒污泥（AGS）是一种具有有前景的磷回收（PR）潜力的污水处理技术。在此，采用城市污水开发了基于AGS 的同步硝化反硝化和磷去除耦合侧流 PR 工艺（AGS-SNDPRr）。结果表明，AGS 始终保持良好的结构稳定性，经过 40 天的富磷厌氧液提取（固定速率为 30%）后，对污染物的去除没有影响且效果良好。AGS-SNDPRr 实现了稳定的磷回收效率为 63.40%，侧流 PR 进一步使原位污泥减少了 7.7-10%。除了胞外聚合物（EPS）的响应外，典型的反硝化糖原积累菌（DGAOs）Canidatus_Competibacter 的马修效应高达 67.40%，主要有助于提高新工艺的性能。本研究为同时进行高级废水处理、磷回收和减少剩余污泥提供了一种新方法。
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