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.
出处
《中国给水排水》
CAS
CSCD
北大核心
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)
