连续颗粒混合流自养脱氮反应器中的启动和氧气浓度影响。
Startup and oxygen concentration effects in a continuous granular mixed flow autotrophic nitrogen removal reactor.
机构信息
Departamento de Ingeniería Química, Universidad de Concepción, Casilla 160 C Correo 3, Concepción, Chile.
Departamento de Ingeniería Química, Universidad de Concepción, Casilla 160 C Correo 3, Concepción, Chile.
出版信息
Bioresour Technol. 2015 Aug;190:345-51. doi: 10.1016/j.biortech.2015.04.086. Epub 2015 Apr 29.
The startup and performance of the completely autotrophic nitrogen removal over nitrite (CANON) process was tested in a continuously fed granular bubble column reactor (BCR) with two different aeration strategies: controlling the oxygen volumetric flow and oxygen concentration. During the startup with the control of oxygen volumetric flow, the air volume was adjusted to 60mL/h and the CANON reactor had volumetric N loadings ranging from 7.35 to 100.90mgN/Ld with 36-71% total nitrogen removal and high instability. In the second stage, the reactor was operated at oxygen concentrations of 0.6, 0.4 and 0.2mg/L. The best condition was 0.2 mgO2/L with a total nitrogen removal of 75.36% with a CANON reactor activity of 0.1149gN/gVVSd and high stability. The feasibility and effectiveness of CANON processes with oxygen control was demonstrated, showing an alternative design tool for efficiently removing nitrogen species.
在一个采用两种不同曝气策略（控制氧气体积流量和氧气浓度）的连续进料颗粒气泡柱反应器（BCR）中，测试了完全自养亚硝酸氮脱除（CANON）工艺的启动和运行情况。在采用氧气体积流量控制的启动阶段，空气量调整为 60mL/h，CANON 反应器的体积氮负荷范围为 7.35 至 100.90mgN/Ld，总氮去除率为 36-71%，且稳定性高。在第二阶段，反应器在 0.6、0.4 和 0.2mg/L 的氧气浓度下运行。最佳条件为 0.2mgO2/L，总氮去除率为 75.36%，CANON 反应器活性为 0.1149gN/gVVSd，且稳定性高。该研究证明了采用氧气控制的 CANON 工艺的可行性和有效性，为高效去除氮物种提供了一种替代的设计工具。
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