高浓度氨氮废水同步硝化反硝化性能研究
Simultaneous nitrification and denitrification of high ammonia nitrogen wastewater
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摘要: 利用序批式反应器研究了溶解氧浓度和进水碳氮比对高浓度氨氮废水脱氮性能的影响。结果表明，溶解氧浓度降低实现了短程同步硝化反硝化，并提高了反应器脱氮效率。反应器运行经历了外部碳源的摄取、PHB储存、PHB有氧氧化和同步硝化反硝化作用，PHB作为同步硝化反硝化过程中反硝化的电子供体。Abstract: The effects of dissolved oxygen concentration and influent carbon to nitrogen ratio on nitrogen removal performance of a wastewater containing strength ammonia nitrogen were investigated in a sequencing batch reactor. Experimental results showed that the decrease of dissolved oxygen concentration led to short-cut simultaneous nitrification and denitrification and improved the total-nitrogen removal capacity. External carbon source uptake, PHB storage, aerobic PHB oxidation and simultaneous nitrification-denitrification processes were taken place in the operation of the reactor. PHB was demonstrated to be the electron donor of denitrification reaction in the simultaneous nitrification-denitrification process.
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