Abstract:Complete autotrophic nitrogen removal over nitrite (CANON) process was successfully startedup with a low volumetric exchange ratio (30%) under alternative limited-oxygen/anaerobic mode in SBR, and the total nitrogen removal rate as well as the total nitrogen removal efficiency reached (312±15)mg/(L·d) and (71.2±4.3)%, respectively. The startup of CANON SBR experienced nitrification-leading phase, partitial-nitritation-leading phase and CANON phase in general. Granular biomass and floccular biomass were both found in SBR. The volume of granular biomass (radius3300μm) and floccular biomass (radius<300μm) made up 39% and 61% of total sludge volume, respectively. The long-term N2H4 addition recovered and enhanced their autotrophic nitrogen removal capacity, with the total nitrogen removal rate increased to (480±34)mg/(L·d). The proportion of granular biomass increased to 51% of total sludge volume.
蔡庆, 张代钧, 丁佳佳. 全自养脱氮颗粒污泥的培养及脱氮性能的恢复与强化[J]. 中国环境科学, 2014, 34(11): 2805-2812.
CAI Qing, ZHANG Dai-Jun, DING Jia-Jia. The cultivation of completely autotrophic nitrogen removal over nitrite granular sludge and the recovery and enhancement of nitrogen removal. CHINA ENVIRONMENTAL SCIENCECE, 2014, 34(11): 2805-2812.