摘要
采用新型泥膜复合式CAST工艺中试装置处理低碳源市政污水,分别考察了非限制性、区域交替、三段式和两段式曝气方式下该系统对有机物、氮和磷的去除能力。中试结果表明,四种曝气方式对COD、氨氮和总磷的去除效果影响较小,而对总氮的去除能力影响显著。与非限制性曝气方式相比,三种限制性曝气方式下对总氮的去除率明显提高,其中三段式曝气对总氮的去除率最高,达到了72.3%;限制性曝气方式不仅可以节省曝气能耗,而且能够有效减少污泥损失。
A novel composite CAST process was employed for treating domestic sewage with a low carbon content. Effect of four aeration modes including unlimited aeration, regional alternate aeration, three-stage aeration and two-stage aeration on the pollutants removal was investigated. The results showed that the aeration modes had little influence on COD, TP and NH3 -N removal, but they had a remarka- ble effect on TN removal. Limited aeration modes significantly improved TN removal compared with the unlimited aeration mode. The three-stage aeration had the best TN removal of 72.3 % , it could increase TN removal rate by 16.3% compared with unlimited aeration mode. On the other hand, the three limited aeration modes not only saved a lot of energy, also avoided the disintegration of activated sludge in the system.
出处
《中国给水排水》
CAS
CSCD
北大核心
2017年第5期1-4,共4页
China Water & Wastewater
