YANGJing-yue.Effect of Sodium Acetate on ANAMMOX Coupled Denitrification System with Sufficient Nitrite Nitrogen[J].China Water & Wastewater,2023,39(17):93-98.
亚硝态氮充足下乙酸钠对厌氧氨氧化/反硝化的影响
- Title:
- Effect of Sodium Acetate on ANAMMOX Coupled Denitrification System with Sufficient Nitrite Nitrogen
- Keywords:
- anaerobic ammonia oxidation (ANAMMOX); denitrification; sodium acetate; nitrite nitrogen; microbial community
- 摘要:
- 通过连续流实验，研究了在亚硝态氮充足的条件下乙酸钠有机物对厌氧氨氧化（ANAMMOX）耦合反硝化系统（SAD）的影响。结果表明，当乙酸钠浓度（以COD计）为20 mg/L时，耦合系统脱氮性能良好；而当乙酸钠浓度增至50 mg/L时，ANAMMOX受到严重抑制，系统脱氮性能受到严重影响。进一步通过高通量生物测序研究颗粒污泥的微生物菌群变化。随着乙酸钠浓度的增加，颗粒污泥的主要厌氧氨氧化菌属Candidatus Kuenenia所占比例由20.42%降为2.30%，厌氧氨氧化菌的生物密度逐渐降低，反硝化菌的生物密度逐渐升高，厌氧氨氧化菌处于劣势。
- Abstract:
- This paper investigated the effect of sodium acetate on continuous-flow anaerobic ammonia oxidation (ANAMMOX) coupled denitrification system (SAD) under the condition of sufficient nitrite nitrogen. When the concentration of sodium acetate (COD) was 20 mg/L, satisfactory nitrogen removal performance of the coupled system was obtained. When the concentration of sodium acetate was increased to 50 mg/L, ANAMMOX was severely inhibited, and the nitrogen removal performance of the system was significantly affected. The change in microbial community of the granular sludge was further analyzed by high-throughput sequencing. With the increase of sodium acetate concentration, the relative abundance of Candidatus Kuenenia which was the main ANAMMOX bacteria (AAOB) in granular sludge, decreased from 20.42% to 2.30%, the biological density of AAOB gradually decreased, and the biological density of denitrifying bacteria gradually increased, indicating that the ANAMMOX bacteria was disadvantageous in the system.
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