改进型A^3/O-MBR工艺处理城镇生活污水中试  

Pilot Study on Improved A^3/O-MBR Process for Treatment of Municipal Domestic Wastewater

作　　者：吕江 刘立恒[1,2] LV Jiang;LIU Liheng(Guangxi Key Laboratory of Environmental Pollution Control Theory and Technology, Guilin University of Technology;Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area, Guilin University of Technology: Guilin 541004, China)

机构地区：[1]桂林理工大学广西环境污染控制理论与技术重点实验室 [2]桂林理工大学岩溶地区水污染控制与用水安全保障协同创新中心,广西桂林541004

出　　处：《水处理技术》2019年第1期102-105,112,共5页Technology of Water Treatment

基　　金：国家自然科学基金重点项目(51638006);广西高等学校高水平创新团队及卓越学者计划项目(002401013001);广西矿冶与环境科学实验中心(KH2012ZD004);广西"八桂学者"团队项目

摘　　要：采用改进的A^3/O-MBR工艺对南方某城市污水厂初沉池出水(第1阶段)和进水(第2阶段)进行中试处理,探究了该工艺抗底物冲击负荷的能力,分析了系统脱氮除磷的潜能,考查了原位曝气抑制膜污染的作用。结果表明,改进的A^3/O-MBR工艺抗冲击负荷的能力强,能够承担COD容积负荷0.25～5.25 kg/(m^3·d)的有机污染荷载;两阶段出水COD分别为15.87 mg/L和31.70 mg/L,去除率分别为92.34%和98.27%;高有机负荷能有效缓解脱氮与除磷的碳源争夺;第2阶段实验出水TN、TP的质量浓度分别为7.2、0.44 mg/L,TN和TP去除率分别比第1阶段提高了约44个和48个百分点。原位曝气能够有效地抑制可逆污染,缓解膜污染的进一步恶化。A pilot process of improved A^3/O-MBR was used to treat the effluent (first stage) and influent (second stage) of the primary sedimentation tank of a municipal wastewater treatment plant in a southern city. The resistance to substrate impact load and nitrogen and phosphorus removal potential of the process were investigated, while the role of in-situ aeration to inhibit membrane fouling was also discussed. The results showed that the improved A^3/O-MBR process had strong impact load resistance, and could bear the organic pollution load of COD volumetric loading of 0.25~5.25kg/(m^3·d). The COD of the two-stage test effluents were 15.87 mg/L and 31.70 mg/L, and the removal rates were 92.34% and 98.27%, respectively. The higher organic load could effectively alleviate the carbon source competition between denitrification and phosphorus removal. The mass concentration of TN and TP of the second stage test effluent were 7.21 mg/L and 0.44 mg/L, respectively, compared to the first stage, the TN and TP removal rates were increased by about 44% and 48%, respectively. In-situ aeration can effectively suppress reversible pollution and alleviate further deterioration of membrane fouling.

关 键 词：改进型A^3/O-MBR工艺 生活污水 脱氮除磷 膜污染 

分 类 号：TQ028.8[化学工程] X703.1[环境科学与工程—环境工程]