城镇污水处理厂脱氮除磷好氧污泥颗粒化研究

Study on Granulation of Nitrogen and Phosphorus Removal Sludge from Urban Sewage Treatment Plant

采用序批式生物反应器(SBR)培养好氧颗粒污泥处理模拟废水,优化好氧颗粒污泥内部好氧-兼氧-厌氧微环境,在反应器的快速启动、稳定运行阶段分别考察不同优化条件下系统的脱氮除磷性能。提出了优化污泥沉降时间、调控曝气方式等好氧污泥快速颗粒化途径,并研究排泥方式对颗粒污泥反应器稳定性的影响,通过强化脱氮除磷功能菌富集,实现氮磷同步高效去除。

Aerobic granular sludge obtained from SBR was used to treat simulated wastewater. Internal aerobic - facuhative anaerobic - anaerobic micro environment of the aerobic granular sludge was optimized. The removal efficiency of nitrogen and phosphorus was studied at different stage of the reactor and optimized condition of the system. By optimizing sludge settling time and aeration pattern, rapid sludge granulation can be achieved. The impact of sludge discharging method toward reactor stability was also discussed. Simultaneous removal of nitrogen and phosphorus was realized by means of function bacteria gathering.