低碳城市污水脱氮工艺中硝化颗粒污泥的培养  

Cultivation of Nitrifying Granular Sludge in Low-carbon Municipal WastewaterNitrogenRemoval Process

作　　者：张余健 杨一宸 马斌 委燕 ZHANG Yu-jian;YANG Yi-chen;MA Bin;WEI Yan(Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province,Hainan University,Haikou 570228,China;State Key Laboratory of Marine Resource Utilization in South China Sea,Hainan University,Haikou 570228,China)

机构地区：[1]海南大学海南省农林环境过程与生态调控重点实验室,海南海口570228 [2]海南大学南海海洋资源利用国家重点实验室,海南海口570228

出　　处：《中国给水排水》2023年第7期17-22,共6页China Water & Wastewater

基　　金：海南省基础与应用基础研究计划(自然科学领域)高层次人才项目(2019RC017);国家自然科学基金资助项目(51868015)。

摘　　要：为了实现低碳城市污水高效深度脱氮,构建短程反硝化/厌氧氨氧化+硝化颗粒污泥脱氮工艺,研究硝化颗粒污泥的培养策略。结果表明,采用上向流污泥床(USB)反应器以序批式运行,并逐步缩短沉淀时间,成功培养出了硝化颗粒污泥,其中90.52%的污泥颗粒粒径>0.5 mm;颗粒污泥的沉降速度随着粒径的增大而增大,0.5~0.9 mm粒径的颗粒污泥平均沉降速度为15.66 m/h。颗粒污泥形成后,USB反应器的氨氮容积去除速率达到1.31 g/(L·d)。短程反硝化厌氧氨氧化+硝化颗粒污泥工艺的脱氮性能分析结果表明,该工艺脱氮效率高、有机碳源需求量低,适合处理低碳城市污水并实现深度脱氮。To achieve efficient and advanced nitrogen removal of low-carbon municipal wastewater,this paper established a process consisting of partial denitrification/Anammox and nitrifying granular sludge(PDA-N),and investigated the cultivation of nitrifying granular sludge.The up-flow sludge bed(USB)reactor was run in sequential batch mode and the settling time was gradually shortened.Nitrifying granular sludge was thus successfully cultivated,and 90.52% of the nitrifying granular sludge had a particle size greater than O.5 mm.The settling velocity of granular sludge increased with the increase of particle size,and the average settling velocity of particles with particle size of 0.5-0.9 mm was 15.66 m/h.After the formation of granular sludge,the volumetric removal rate of ammonia nitrogen in the USB reached 1.31 g/(L·d).The PDA-N process had high nitrogen removal efficiency and low demand for organic carbon sources,which was suitable for advanced nitrogen removal of low-carbon municipal wastewater.

关 键 词：低碳城市污水 短程反硝化 厌氧氨氧化 硝化颗粒污泥 

分 类 号：TU992[建筑科学—市政工程]