一种改进的MSBR工艺脱氮除磷性能的仿真模拟与试验研究

针对6池MSBR工艺除磷效果不佳和污泥上浮问题，通过新增厌氧池、调整浓缩池位置对其进行改造，提出了一个改进的7池MSBR工艺．应用活性污泥2号模型(ASM2)分别对两种工艺进行了仿真模拟，结果表明，改进工艺具有较好的脱氮除磷性能．在此基础上对7池MSBR工艺开展了实验室试验，试验结果显示，新工艺对耗氧有机物(以COD值计)、NH2．N、TP的去除率分别为94．2％、81．4％和88．7％，脱氮除磷效率均高于有关献报道的6池工艺．新工艺妥善处理了脱氮除磷等各单元之间的关系，因而强化了除磷脱氮能力．试验结果与模型模拟结果基本吻合，表明活性污泥模型对新工艺的开发具有一定的指导意义．

Mathematical simulation and lab-scale experimentation to an upgrading MSBR process for nitrogen and phosphorus removals

Being concerned on the shortages of the present 6-tank MSBR, such as the lower efficiency of phosphorus removal and sludge suspending, an upgrading 7-tank MSBR was set up through adding an anaerobic tank and adjusting the location of the concentration tank. The mathematical model and computer program based on ASM 2 were applied to simulated the 6-tank and 7-tank MSBR processes, and simulation results of two processes showed that 7-tank MSBR had higher removal efficiency for NH~+_4-N and TP than 6-tank MSBR . Then, the lab experiments for 7-tank MSBR were carried out, and removal rate of, COD, nitrogen and phosphorus were achieved at 94.2%, 81.4% and 88.7%, respectively. The upgrading process could resolve the relations appropriately among different-function tanks. And as a result, the function for the nitrogen and phosphorus removals was enhanced. The results were primarily accorded to the model, which indicated the function of activated sludge model in the development of new processes.