Abstract:The sludge that deriving from a stable CANON biofilter was seeded to two same SBR reactors at room temperature (22~26℃), in which the influence of DO on the nitrogen removal, stability and sludge morphology of CANON process were studied by setting different initial DO and DO gradient. The results showed that the reactor with the initial DO of 0.05~0.1mg/L could run stably with the ammonia and TN removal efficiency of 99% and 85.4%, respectively, while the reactor with initial DO of (0.40±0.5)mg/L showed rather lower removal efficiencies of 99% and 0, respectively. DO concentration was increased gradually from 0to 0.2, 0.4, 0.5mg/L, correspondingly, the anaerobic ammonia removal rate reached to 35.95, 23.89, 31.50, 19.25mgN/(L·h), respectively. Moreover, the reactor could still run normally after two hours’ extended aeration The activity of the CANON reactor went up with the increase of DO within a certain DO range, and the higher DO presented a large and irreversible impact on the early vaccinating CANON reactor while showed little and reversible influence on the stable CANON reactor. Micrographs indicated the tendency of sludge granulation in the stable CANON reactor.
李冬, 崔少明, 梁瑜海, 张肖静, 苏庆岭, 吴青, 张杰. 溶解氧对序批式全程自养脱氮工艺运行的影响[J]. 中国环境科学, 2014, 34(5): 1131-1138.
LI Dong, CUI Shao-Ming, LIANG Yu-Hai, ZHANG Xiao-Jing, SU Qing-Ling, WU Qing, ZHANG Jie. The effect of dissolved oxygen on running CANON process in sequencing batch reactor. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(5): 1131-1138.