Abstract: An experiment of the chemical industrial park wastewater treatment by flat MBR system got excellent treatment effect. The removal rates of COD and NH3-N were over 95% and 99% respectively. The MLSS in this MBR system kept stable at 8200 mg/L，the SS of treated water was almost 0，all the indexes reached the Chinese standard of reclaimed water (GB/T 18920—2002). This experiment result showed that the flat MBR system had the advantages of simple process，small land occupancy，high efficiency，and good treatment result. An economic analysis showed that the unit treatment cost of flat MBR was only a little higher than Cyclic Activated Sludge System (CASS). It is a good way for the chemical industrial park to take wastewater into recycle，save resource and reduce pollution.

摘要： 通过平板膜生物反应器处理某化工园区的综合废水，取得了良好的效果：COD去除率达到95％以上，氨氮去除率达到99％以上，反应器内MLSS稳定在8200 mg/L左右，出水SS几乎为0，出水达到中水回用标准（GB/T 18920—2002）。试验结果表明，平板膜生物反应器具有工艺简单、占地少、效率高、出水水质好等优点，通过经济性分析，其单位处理成本仅略高于现有CASS工艺，且出水可以实现回用，是实现化工园区废水资源化和节能减排的一个良好途径。