在无剩余污泥外排的条件下，采用序批式生物膜反应器处理高浓度生活污水时磷得到了高效去除，传统聚磷菌除磷理论无法解释此现象．为此，文中通过对系统的磷平衡分析及污泥中聚合磷酸盐和结合态磷化氢含量的监测，探讨无剩余污泥外排下磷高效去除的途径．试验结果表明: 反应器启动后在不外排污泥、连续曝气条件下连续运行38 d期间，出水总磷( TP) 去除率稳定在82. 1% ～ 91. 8%; 反应器自启动开始运行45 d 期间的磷平衡分析表明，系统共损失530. 0mg 磷; 反应器周期运行期间，干污泥中聚合磷酸盐最高含量( 以每克干污泥中所含聚合磷酸盐质量计) 仅为0. 257mg /g，污泥磷含量( 以TP 占干污泥的质量百分比计) 为1. 93%，表明该系统为非聚磷菌生物除磷系统; 湿污泥中结合态磷化氢含量( 以每千克湿污泥中所含结合态磷化氢质量计) 高达3.5mg /kg，表明系统中的磷以磷化氢气体的形式发生转化．

High-efficiency phosphorus removal is generally found in the sequencing batch biofilm reactor ( SBBR) without sludge discharge for the treatment of high-concentration domestic sewage,which can not be explained by the traditional PAOs ( Poly-Phosphate Accumulating Organisms) phosphorus removal theory. In order to explore the way to the high-efficiency phosphorus removal without sludge discharge,the phosphorus balance of the system was analyzed,and the contents of ploy-P and matrix-bound phosphine ( MBP) were monitored. Experimental results indicate that the effluent total phosphorus ( TP) removal stabilizes at 82. 1%~91. 8% in the condition of continuous aeration during a 38-d continuous operation without sludge discharge. According to the analysis results of phosphorus balance in the period from the system start-up to a 45-d running,it is found that 530. 0mg of phosphorus is lost in the system,with only 0. 257 mg of poly-P contained in per gram of dry sludge,and the TP content reaches 1. 93% ( calculated as the mass fraction of TP in per gram of dry sludge) ,which means that the discussed system is a non-PAOs biological phosphorus removal system. Moreover,it is found that the phosphorus in the system can be transformed into phosphine gas as the MBP mass in per kilogram of wet sludge reaches up to 3. 5mg.