新型UniFed SBR生物除磷脱氮工艺

New UniFed SBR Process for Biological Nitrogen and Phosphorus Removal

介绍了新型UniFedSBR工艺的运行方式、在除磷脱氮方面的特点及其在实际污水处理厂的应用实例。其特点是在SBR运行周期的沉淀和排水阶段,将进水均匀地引入沉淀污泥层,以取得反硝化和厌氧放磷所需的适宜条件。与复杂的连续流生物脱氮除磷工艺相比,该工艺采用单池运行,不需物理分区和污泥回流即可达到较高的除磷脱氮效率,还可减少基建投资。

The paper introduces a new UniFed SBR process in its operation modes, characteristics in nitrogen and phosphorus removal and the practical application in a wastewater treatment plant. The main characteristic of the UniFed SBR process is that the influent is introduced to the settled sludge layer during the settling and decant period of a SBR operation. Therefore, suitable conditions for denitrification and anaerobic phosphate release are achieved. Compared with the complex continuous flow processes for biological nitrogen and phosphorus removal, the UniFed SBR process employs a single tank operation without any physical zone separation or sludge recycling to obtain a high nitrogen and phosphorus removal efficiency. The construction cost is low.