In order to improve the water quality of a waste water treatment plant, the conventional SBR technique was improved by the application of an activated sludge process with suspending filling material into intermittent aeration tanks and the chemical index such as COD,BOD5,NH+4－N,T－P and biofacies were investigated in paralleling experiments. Compared with the traditional SBR, the SBR with suspending filling material could improve obviously bio diversity, the existing type, the allocation of matrix and the mass transfer mode, and shows better tolerance of influent volume and quality. In addition, the removal efficientcy of COD,BOD5,NH+4－N,T－P was greatly increased from the previous 67.9%,81.6%,56.4%,62.5% to 78.4%,88.9%,69.2%,74.2%, respectively.This research focused on the application in SBR with changeable water levels and other intermittent aeration tanks,which is a breakthrough to traditional application of suspending filling material that was usually used in continuous aeration tank.This research had practical value for the improvement of ever built wastewater treatment plants.
