In situ probing of microbial activity within anammox granular biomass with microelectrodes

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• Affiliation of Author(s):环境与市政工程学院
• Journal:Journal of bioscience and bioengineering
• Key Words:中文关键字：厌氧氨氧化；反硝化；原位生物活性；活性分区；微电极，英文关键字：anammox; denitrification; in situ microbial activi
• Abstract:An anaerobic rotating biological contactor was fed with inorganic synthetic wastewater for anammox. Besides biofilm, granular biomass with average diameter of approximately 5 mm formed. NH4+, NO2–, NO3– and pH microelectrodes were used to probe microbial activity in situ within the granules. At a sufficient substrate concentration, the anammox reaction was observed in the upper layer of granules, and the most active zone was found to be in the surface of 200–400 m. The in situ anammox activity increased with increasing substrate concentration, and a maximum ammonium consumption rate of 83.3 mol cm–3 h–1 was obtained at an ammonium concentration of 1000 mol L–1. Under an ammonium-limited condition, denitrification activity was observed in the inner layer, and the most active zone was limited to 700–1000 m. This study revealed that denitrification bacteria coexisted with anammox bacteria within inorganic anammox granules.
• Note:吕永涛
• Co-author:鞠恺,孙婷,蔚凡,夏四清
• First Author:wangxudong,miaorui,wanglei,lvyongtao
• Indexed by:Journal paper
• Volume:卷：121
• Issue:期：4
• Page Number:页：450-456
• Translation or Not:no
• Date of Publication:2016-04-01