曝气生物滤池脱氮的研究进展

Research progress on nitrogen removal by biological aerated filter

介绍了曝气生物滤池的种类、脱氮的原理以及在工业废水和生活污水处理方面的实际应用,总结了曝气生物滤池脱氮影响因素方面的国内外研究成果,其中影响因素包括气水比、水力负荷、HRT、C/N、反冲洗、pH和滤料等。本文还综合考虑了成本和处理效果等问题,给出了各个影响因素的适宜范围。此外,本文还指出了曝气生物滤池技术目前在脱氮方面所存在的两个关键性问题——反硝化碳源不足和缺氧区域形成受限等问题,并提出了能够解决这两个问题的3种改良工艺——释碳材料、异养硝化好氧反硝化脱氮和曝气生物滤池组合工艺等,同时还介绍了这3种工艺在曝气生物滤池脱氮方面的研究成果、具有的优势以及目前存在的主要问题。此外,还对曝气生物滤池技术在脱氮方面的前景进行了展望。

The types and principles of nitrogen removal and their practical applications in both industrial and municipal wastewater of BAF are discussed in this paper. The recent research progresses on the influencing factors of nitrogen removal,such as air-water ratio,hydraulic loading,HRT,C/N,backwashing,pH and filter media,are summarized. And the optimum ranges of all those factors are given in terms of the cost and removal efficiency. The main problems including poor carbon source for denitrification and restricted anoxic zone are also presented. And the improved processes to solve those two main problems,such as carbon releasing material,heterotrophic nitrification-aerobic denitrification and integrated process,are discussed. The applications,strengths and problems of these three improved processes are compared. Furthermore,the trend of nitrogen removal by biological aerated filter is also presented.