Orbal氧化沟混合液流态试验研究

该试验为荷兰赠款项目西部小城镇污水处理工程中的改良型Orbal氧化沟技术研究内容之一,为稳妥进行工程设计需进行现场同类Orbal氧化沟的测试。该试验在实际污水处理厂进行,对采用同心椭圆型沟道的Orbal氧化沟的流速分布进行了的测定,重点研究了Orbal氧化沟的水力流态特征,验证了曝气及水下推动设备功率配置的合理性。结果表明：氧化沟弯道水力情况复杂,极易造成弯道内侧底部的积泥发生从而影响氧化沟的水力混合条件;底部积泥现象普遍,部分区域积泥严重;曝气及水下推动设备设计功率未能达到要求。

Research and Experiment on Mixed Liquor of Orbal Oxidation Ditch

This experiment is one of the improved types of Orbal oxidation ditch technologies belonging to the sewage treatment engineering project to be carried out at the small town in western China supported by the Holland Grant Project.The survey for similar Orbal oxidation ditch was performed on-the-spot for safety of engineering design.The experiment individually focused on the velocity distribution of concentration ellipse shape represented in oxidation ditches existed in sewage treatment plants,and confirmed the rationality of aeration and the submersed flow driver power designed.The result shows: Firstly,for such oxidation ditch,it is easy to cause sediment resulted from complex waterpower of crook,and affect blend condition.Secondly,the sediment is prevalent,especially in some places.Finally,the design power of aeration and submersed flow driver are insufficient.