Nitrogen removal for low-carbon wastewater in reversed A2/O process by regulation technology
来源期刊：中南大学学报(英文版)2009年第z1期
论文作者：张智 陈杰云 谢丽华 范功端 尹晓静 李勇
文章页码：304 - 308
Key words：reversed A2/O process； low-carbon resource； landfill leachate； primary sedimentation tank； nitrogen removal
Abstract: Full scale experimental study on nitrogen removal for low-carbon wastewater was conducted in reversed A2/O process in Jiguanshi waste water treatment plant in Chongqing,in order to aid the operation and maintenance of similar WWTP. When the proposed measures,such as using 0.1% (volume fraction of wastewater) landfill leachate,shortening HRT by 2/3 in the primary sedimentation tank and controlling DO at 0.5 mg/L in the 3rd section of aerobic zone,are applied,15% of the carbon source can be complemented,the favorable property of activated sludge is achieved,and the nitrogen removal effect is significantly improved. The effluent NH3-N is 2 mg/L and the removal rate is 90%. The effluent TN is 17 mg/L and the removal rate is 54%. The up-to-standard discharge of the effluent is achieved. And after the optimization,the unit electricity consumption also reaches 0.21 kW/h and saves 20%.
