城市污水SBR法短程生物脱氮的中试研究

采用处理量为60m³/d的SBR大型中试系统对实际城市污水的短程脱氮效果和稳定性进行研究.通过对传统时间控制模式和在线实时控制模式的对比分析可知,应用实时在线控制的分段进水交替缺氧/好氧运行模式,在达到相同深度脱氮效果的前提下,相对于传统运行方式的反应时间显著缩短,投加的外碳源量也缩减了25%.系统在保证平均总氮去除率98.2%的基础上,获得了较好的短程硝化效果,各好氧反应段的亚硝化率均在95%以上.精准的在线实时过程控制与交替缺氧/好氧的运行方式是短程生物脱氮实现及稳定的主要因素.

A pilot scale study on short-cut biological nitrogen removal of municipal wastewater with SBR process

The effect and stability of short-cut nitrogen removal of actual municipal wastewater were studied, adopting SBR technique large type scale system with treatment capacity of 60m3/d. Through comparing analysis of traditional time control model and on-line actual time control model, the reaction time reduced greatly and the external carbon source could be saved more than 25% with real-time control, under the premise of reaching nitrogen removal effect of same depth. The system based on the pledged average total nitrogen removal rate of 98.2%, obtained good short-cut nitration effect, the subnitration of each aerobic reaction was all above 95%. The accurate on-line real time process control and alternative anoxic/aerobic operating mode were the main factors of the achievement and stabilization of the short-cut biological nitrogen removal.