Vázquez-Padín Jose, Fernádez Isaac, Figueroa Mónica, Mosquera-Corral Anuska, Campos Jose-Luis, Méndez Ramón
Department of Chemical Engineering, University of Santiago de Compostela, Lope Gómez de Marzoa, s/n, E-15782, Santiago de Compostela, A Coruna, Spain.
Bioresour Technol. 2009 Jun;100(12):2988-94. doi: 10.1016/j.biortech.2009.01.028. Epub 2009 Feb 25.
The supernatant of an anaerobic digester was treated at 20 degrees C in two systems. The first one is a two units configuration, conformed by two sequencing batch reactors (SBR), carrying out partial nitrification and Anammox processes, respectively. Partial nitrification was achieved by granular biomass with a mean diameter of 3 mm, operating at a dissolved oxygen concentration of 2.7 mg/L. The combined system allowed the removal of nitrogen loading rates around 0.08 g N/(Ld). Afterwards, Anammox biomass was spontaneously developed in the inner core of the nitrifying granules of the SBR and therefore, partial nitrification and Anammox process were carried out in a single unit. Once the stable CANON process was established, a mean nitrogen removal rate of 0.8 g N/(Ld) was registered. The settling velocities of the granules ranged from 70 to 150 m/h with sludge volumetric index values lower than 50 mL/g VSS during the whole operation.
厌氧消化器的上清液在两个系统中于20摄氏度下进行处理。第一个系统是两单元配置，由两个序批式反应器（SBR）组成，分别进行部分硝化和厌氧氨氧化过程。部分硝化通过平均直径为3毫米的颗粒生物质实现，在溶解氧浓度为2.7毫克/升的条件下运行。该组合系统能够去除约0.08克氮/（升·天）的氮负荷率。之后，厌氧氨氧化生物质在SBR硝化颗粒的内核中自发形成，因此部分硝化和厌氧氨氧化过程在单个单元中进行。一旦建立了稳定的CANON工艺，记录到的平均氮去除率为0.8克氮/（升·天）。在整个运行过程中，颗粒的沉降速度范围为70至150米/小时，污泥容积指数值低于50毫升/克VSS。
