Abstract:

Combined with the characteristics of spiral upflow reactor（SUFR）system, the nutrient removal of the SUFR system with a prolonged sludge age was analyzed through test comparison The operation of the SUFR system（θ_c=32 d）showed that the effluent COD was less than 40 mg·L^-1 and the effluent TN was less than 10 mg·L^-1The removal of TP in the SUFR system（θ_c=32 d）was less than 1 mg·L^-1, although the decrease of TP removal coupled with a longer sludge age was observedThe specific oxygen utilization rate (SOUR) of the SUFR system（θ_c=32 d）was in the range of 10～18 mg·g^-1·h^-1The results of CFD simulation showed that the volume ratio of plug flow reactors in the flow model was estimated to be about 63%, showing that the major flow pattern of the spiralup flow reactor was plug flowIt was indicated that the negative effect of a longer sludge age was compensated by the hydraulic characteristics of the SUFR, which was similar to plugflowreactorThe optimal sludge age range of the SUFR system could be wider.

摘要：

结合螺旋升流式反应器（SUFR）的特性，通过对比试验分析SUFR系统在较长泥龄时（主要在32 d左右）营养物去除的工艺特点。试验结果表明，SUFR系统（θ_c=32 d）出水COD和TN分别小于40 mg·L^-1﹑10 mg·L^-1，SUFR系统（θ_c=32 d）除磷率随着泥龄的延长有一定的下降,但出水TP一直稳定在1 mg·L^-1内， SUFR系统（θ_c=32 d）的SOUR值为10～18 mg·g^-1·h^-1。流态模拟结果表明，SUFR系统中单元反应器的推流流态容积利用率为63%。这说明SUFR系统反应器以活塞流为主要特征的流态特性有助于减轻较长泥龄对污水处理的负影响。该系统具有更宽的泥龄适宜范围。