不同聚集形态短程反硝化耦合厌氧氨氧化系统脱氮性能与碳源利用特性  

NITROGEN REMOVAL EFFICIENCY AND CARBON SOURCE UTILIZATION CHARACTERISTICS OF PARTIAL DENITRIFICATION COUPLING ANAMMOX PROCESSES WITH DIFFERENT SLUDGE AGGREGATION MODES

作　　者：李聪[1] 杜睿[1] 彭永臻[1] LI Cong;DU Rui;PENG Yongzhen(National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology,Beijing University of Technology,Beijing 100124,China)

机构地区：[1]北京工业大学城镇污水深度处理与资源化利用技术国家工程实验室,北京100124

出　　处：《环境工程》2023年第9期1-9,共9页Environmental Engineering

基　　金：国家自然科学基金项目(22276007)。

摘　　要：考察了微生物以生物膜和颗粒污泥两种聚集方式主导的短程反硝化耦合厌氧氨氧化(PD/A)系统启动与长期运行性能、功能菌活性变化与种群结构差异。通过批次试验研究了碳源类型和碳氮比(C/N)对不同聚集形态的PD/A污泥脱氮活性的影响。结果表明,PD/A生物膜与颗粒系统均实现了氨氮(NH_(4)^(+)-N)和硝态氮(NO_(3)^(-)-N)的同步高效稳定去除,其总氮(TN)去除率分别为90.6%和96.2%。碳源类型对PD过程实现亚硝态氮(NO_(2)^(-)-N)积累具有显著影响。当C/N为5.0时,生物膜系统比NO_(3)^(-)-N还原速率(μNO_(3))由大到小依次为乙酸钠、葡萄糖、乙醇和甲醇;在C/N为3.0时,生物膜系统比NH4+-N降解速率(μNH_(4))由大到小依次为葡萄糖、乙醇、乙酸钠和甲醇;在适宜C/N范围内,厌氧氨氧化活性随短程反硝化活性提升而提高;当乙酸钠为碳源时,颗粒污泥系统表现出较高的短程反硝化活性;但改变碳源后,颗粒污泥系统反硝化活性低于生物膜系统。因此,针对不同聚集形态活性污泥系统,选择适宜的碳源类型及C/N值对PD/A工艺稳定运行具有重要作用。This study investigated the startup and long-term nitrogen removal efficiency,activities of functional bacteria,and microbial structure of partial denitrification coupling Anammox(PD/A)with biofilm and granular sludge.Batch tests were conducted to investigate the effect of the carbon source type and C/N(COD/NO_(3)^(-)-N)on nitrogen removal efficiency of PD/A sludge with different sludge aggregation modes.Results showed that both biofilm and granular sludge systems could achieve efficient removal efficiency of ammonia(NH_(4)^(+)-N)and nitrate(NO_(3)^(-)-N),with total nitrogen(TN)removal efficiency of 90.6% and 96.2%,respectively.The carbon source type affected PD process achieving nitrite(NO_(2)^(-)-N)accumulation obviously.The specific reduction rate of nitrate(μNO_(3))in descending order was sodium acetate,glucose,ethanol and methanol,when C/N was 5.0 in the biofilm system.The specific reduction of ammonia(μNH_(4))in descending order was glucose,ethanol,sodium acetate and methanol,when C/N was 3.0.The activity of the Anammox process increased with the activity of PD process under a suitable C/N.It held a strong PD process when the sodium acetate was the carbon source in the granular sludge system,however,it held a weaker PD process than biofilm system with the carbon source type changed.Therefore,selecting an appropriate carbon source and C/N for different sludge aggregation systems is beneficial for maintaining the stability of PD/A process.

关 键 词：短程反硝化 厌氧氨氧化 生物膜 颗粒污泥 碳源类型 

分 类 号：X703[环境科学与工程—环境工程]