序批式复合反应器强化同步脱氮除磷

Enhanced Synchronous Biological Nitrogen and Phosphorus Removal in Sequencing Batch Hybrid Reactor System

利用序批式复合反应器(SBHR)中同时存在的活性污泥和悬浮生物膜混合生物体系,进行了强化脱氮除磷的试验研究。连续稳定运行3个月后,系统对TN、TP和COD的平均去除率分别达到90%、95%和95%,处理效果稳定。该系统的悬浮生物膜与活性污泥的混合体系中生物种群具有多样化特征,所形成的微生物生态系统较稳定,抗外界干扰及恢复调节能力强;悬浮微生物体系能与水体形成复杂的整体螺旋上升、局部紊流的流态,有利于在空间形成有机污染物浓度梯度分布,使氧气和硝酸盐氮等电子受体和有机底物的传质效果良好。

Study was conducted by use of the mixed organism of activated sludge and suspended biofilm coexisting in a sequencing batch hybrid reactor （SBHR） system for enhanced removal of nitrogen and phosphorus. After continuous and steady operation for three months, the system achieved removal rate for TN,TP, and COD of 90% , 95% and 95% in average respectively with steady treatment effect. The characteristics of the system were analyzed as follows：the diversified biological population in the mixtures of suspended biofilm and activated sludge formed a steadier eco-system, which had high ability in anti-disturbance from environment and rehabilitation; the suspended microbial system and water system formed the whole spiral upflow and the part turbulent flow, which are beneficial to the formation of gradient distribution of organic pollutant concentration, and thus resulting in the highly effective mass transfer between the electronic acceptor such as oxygen and NO3^- -N and the organic substrates.