SBR中DO的变化及其作为污水处理控制参数的研究

Research of DO variation in SBR and as a control parameter in wastewater treatment

序批式活性污泥法 (SBR)处理污水是一个好氧过程 ,需氧量与有机物的降解有关。反应器内溶解氧 (DO)的变化取决于进水的浓度、曝气量、污泥浓度等因素。试验研究表明 ,进水浓度高 ,需氧量大 ,反应时间长 ;供气量大 ,有机物降解快 ,反应时间短 ;污泥浓度 (MLSS)高 ,有机物降解快 ,反应时间短。而以上污水处理过程的特征都可以由反应器中DO的变化来反映 。

Sequencing batch reactor is an aerobic wastewater treatment process. Oxygen demand is relative to organic matter degradation. Dissolved oxygen in reactor is dependent on concentration of influent, aeration, and MLSS. This experiment and research shows: higher concentration influent needs more oxygen and longer reaction time; higher aeration produced faster organic matter degradation and shorter reaction time; higher MLSS produces faster organic matter degradation and shorter reaction time; DO variation can reflect process and end point of wastewater treatment; and it is feasible to use DO as a control parameter in SBR.