Gudjonsson G, Vollertsen J, Hvitved-Jacobsen T
Environmental Engineering Laboratory, Aalborg University, Denmark.
Water Sci Technol. 2002;45(3):35-44.
Dissolved oxygen (DO) concentrations were during 2 months continuously measured in an intercepting sewer. Measurements were made upstream and downstream in a 3.6 km gravity sewer. DO showed significant diurnal variations mainly caused by changes in the organic matter composition of the wastewater. At low temperatures the gravity sewer was strictly aerobic. However, towards the end of the measuring campaign, DO concentrations decreased as temperature increased and the sewer became anaerobic part of the day. A conceptual model that takes into account bulk water and biofilm DO uptake as well as reaeration was used to simulate the DO measured. Using measurements from the upstream station as input, the model was calibrated to yield good validation results of the DO at the downstream station.
在一条截流式下水道中连续两个月测量了溶解氧（DO）浓度。在一条3.6公里长的重力下水道的上游和下游进行了测量。溶解氧呈现出显著的昼夜变化，主要是由废水有机物成分的变化引起的。在低温时，重力下水道严格处于好氧状态。然而，在测量活动接近尾声时，随着温度升高，溶解氧浓度下降，下水道在一天中的部分时间变成厌氧状态。使用一个考虑了水体和生物膜对溶解氧的摄取以及复氧作用的概念模型来模拟所测量的溶解氧。以上游站点的测量值作为输入，对该模型进行校准，以获得下游站点溶解氧的良好验证结果。
