经济溶解氧在氧化沟节能运行中的应用研究

从曝气系统节能的角度出发,分析污水处理活性污泥法中曝气系统溶氧速率与耗氧速率之间的关系,提出了经济溶解氧浓度的概念,并通过理论分析及实际分析论证了其存在的可能性。通过实验,验证了经济溶解氧在曝气系统中的存在,并且对反应器处于经济溶解氧下的运行效果进行了分析。研究表明,在经济DO浓度下,出水水质符合标准要求,系统运行稳定,跟实测的DO浓度比较,平均DO浓度下降0.7mg/L,节能效果显著。

Applied research on economical DO in operation of oxidation ditch

In order to reduce energy consumption in aeration systems,a concept named economical dissolved oxygen(DO) is proposed by analyzing the relationship between dissolved oxygen rate and specific oxygen uptake rate(SOUR) of activated sludge processes in aeration systems,and the possibility of its existence is verified through theoretical and practical analysis.The existence of economical DO is confirmed via our experiment and the performance of reactor under the economical DO is demonstrated.The results show that under the economical DO,the effluent water is up to the standards,the reactor has stable performance,and the the average DO is 0.7 mg/L lower than practical DO concentration,which notably reduce energy consumption.