autotrophic nitrogen removal discovered in nitritation system

Release time:2024-08-09  Hits:

• Affiliation of Author(s):环境与市政工程学院
• Journal:Chmosphere
• Key Words:中文关键字：亚硝化；厌氧氨氧化；自养反硝化；Nitrosomonas菌，英文关键字：nitritation;anammox;autotrophic denitrification; n
• Abstract:A lab-scale sequencing batch reactor was operated in batch mode to treat ammonium-rich synthetic wastewater, and minor N loss (about 9%) was observed without seeding anaerobic ammonium oxidation bacteria (AnAOB). Around 4 wk after the dissolved oxygen concentration was decreased (from 0.9±0.1 to 0.4±0.1 mg L–1) and the hydraulic retention time was elevated (from 11.0 to 14.7 h), 80% of total nitrogen removal efficiency and 0.49 kg N m–3 d–1 of maximum nitrogen removal capacity were obtained. During a single cycle, a peak of NO2– concentration was observed at 60 min, and the pH first increased from 8.02 to 8.17 and then returned to 8.04. Fluorescence in situ hybridization analysis revealed that the aerobic ammonium-oxidizing genus Nitrosomonas dominated the community, while AnAOB and very small amounts of Nitrospira spp were also detected. The ratio of nitrate produced to ammonia consumed (0.10±0.02) was lower than that achieved with the completely autotrophic nitrogen removal over nitrite process. This study revealed that nitritation, Anammox and autotrophic denitrification were responsible for the nitrogen removal. The nitrate production was caused by the coaction of nitrite-oxidizing bacteria and AnAOB.
• Note:吕永涛
• Co-author:孙婷
• First Author:王志盈,yangyongzhe,wangxudong,wanglei,lvyongtao
• Indexed by:Journal paper
• Volume:卷：79
• Issue:期：2
• Page Number:页：180-185
• Translation or Not:no
• Date of Publication:2010-06-01