圆形孔口多孔板对降解混合物废水的影响

Effects of circular orifices plates on degradation of mixture wastewater due to hydrodynamic cavitation

当前国内外对难降解废水的处理方法因受能耗大、成本高、周期长、设备复杂等因素影响,其应用范围受到限制,所以更倾向于开发简便高效低成本的水力空化技术.现研究文丘里管与圆形孔口多孔板组合的水力空化反应装置对降解硝基苯和对硝基苯酚混合物废水的影响.实验结果表明:废水初始质量浓度为50mg/L左右,孔口直径为5mm且孔口数量多的圆形孔口多孔板的废水处理效果较好,适宜的水温、运行时间的增加均有利于空化的发生,从而可提高废水降解率.

The existing methods to degrade the refractory wastewater are restricted by the large energy consumption,high cost,long period,complex facilities and other adverse factors.Hydrodynamic cavitation is a novel technique of refractory wastewater treatment.This paper focuses on effects of various combinations of Venturi tube with different sizes and numbers of circular orifices plates on degradation of mixture wastewater with nitrobenzene and pnitrophenol.The experimental results showed that size and number of orifice and initial concentration of wastewater considerably affected degradation rate due to hydrodynamic cavitation,and the appropriate water temperature and longer treatment time of wastewater were helpful to occurrence of hydrodynamic cavitation.