SBR亚硝化处理城市生活污水二级出水及其稳定性  

Shortcut Nitrification and Stability in SBR for Treatment of Secondary Effluent of Municipal Domestic Sewage

作　　者：吴迪[1] 李冬[1] 刘丽倩[1] 王斌[1] 高伟楠[1] 李德祥[1] 曾辉平[1] 张杰[1,2] 

机构地区：[1]北京工业大学水质科学与水环境恢复工程北京市重点实验室,北京100124 [2]哈尔滨工业大学城市水资源与水环境国家重点实验室,黑龙江哈尔滨150090

出　　处：《中国给水排水》2013年第11期6-10,共5页China Water & Wastewater

基　　金：国家自然科学基金资助项目(50878003);国家水体污染控制与治理科技重大专项(2012ZX07202-005);新世纪优秀人才支持计划项目(NCET-10-0008)

摘　　要：采用SBR工艺处理A/O除磷工艺出水,考察了影响亚硝化系统稳定性的因素。在室温为(20±3)℃、接种驯化后的亚硝化污泥、进水由高浓度氨氮配水逐渐过渡到A/O除磷工艺处理出水的条件下,采用实时监控策略,以pH值出现拐点作为反应停止标志,逐渐缩短沉降时间,可维持亚硝化的稳定并实现了对生活污水二级处理出水的高效净化。DO、FA与FNA共同维系亚硝化系统的稳定,而延时曝气对亚硝化系统的稳定具有极大的冲击性;当C/N值〈1.0时对系统有微弱的抑制作用,但可在短时间内恢复;控制沉降时间由1—2h逐渐降低至8min以内可促进污泥颗粒化,平均粒径达到0.57mm,同时进一步增强了系统的抗冲击能力。SBR process was used to treat effluent from A/O phosphorus removal process, and factors affecting the stability of shortcut nitrification system were investigated. The experimental conditions were as follows: temperature was (20 ±3)℃, shortcut nitrification sludge was inoculated, and the influent was synthetic high-concentration ammonia nitrogen sewage in the first stage and effluent from A/O phosphorus removal process in the transition stage. Adopting real-time monitoring strategy, using pH in- flection point as reaction stopping indicator and gradually shortening the settling time could maintain stable shortcut nitrification and achieve high-efficiency treatment of secondary effluent. DO, FA and FNA maintained the stability of shortcut nitrification system together. Extended aeration had a great impact on the system stability. When C/N was less than 1.0, a weak inhibitory effect was imposed on the system, but the system quickly restored. Controlling settling time from 1 -2 h to less than 8 min could promotesludge granulation, the average particle size was O. 57 ram, and the impact resistance of the system was further enhanced.

关 键 词：亚硝化 游离氨 游离亚硝酸 溶解氧 碳氮比 颗粒污泥 生活污水 

分 类 号：X703[环境科学与工程—环境工程]