4级三相式生物流化床分段进水工艺脱氮性能的影响因素

Research on Influence Factors of Three-Phase Biological Fluidized Bed with Four Step-Feed Process

针对近年来水体中氮磷元素不断增多、水体富营养化现象日益严重的问题，采用4级三相式分段进水与生物流化床相结合的工艺，旨在能够有效的缓解这一问题，研究了影响脱氮效能的因素。结果表明，该工艺的优化反应条件为：进水分流体积比1．48、容积比2：3、HRT8h，DO的质量浓度1．5-2．0mg／L。4级三相式分段进水生物流化床具有良好的脱氮效能，可为实际工程的新建和改造提供理论基础。

In recent years, nitrogen and phosphorus in water for growing, phenomenon of eutrophication growing, so three-phase biological fluidized bed with four step-feed process can effectively alleviate the problem. The factors which affected the nitrogen removal were investigated. The result indicated that the optimal conditions were： the water diversion ratio was 1.48, the volume ratio was 2：3, the HRT was 8 h, and DO concentration of 1.5-2.0 mg/L. The three-phase biological fluidized bed with four step-feed process displayed a good efficiency on nitrogen removal, which had provided the theoretical foundation for engineering construction and rebuilding.