二级SBR系统处理染料废水长期运行的稳定性

考察了处理染料废水的二级SBR系统在连续运行120个周期过程中的稳定性.系统的运行先后经历了低染料浓度和高染料浓度2种情况.试验发现在长期运行过程中,二级SBR系统对进水水质及操作条件具有良好的适应性;能够有效去除废水中的污染物,对染料的平均去除率为81%～92.5%,对COD的平均去除率为89.4%～93.1%;出水水质比较稳定.在二级SBR系统中,厌氧污泥活性高,降解污染物能力强;好氧活性污泥形成团簇状结构,有利于稳定出水水质.

'Stability of the Two-stage SBR System Treating Dyeing Wastewater During a Long-term Operation

The stability of the two stage SBR system treating dyeing wastewater was investigated during a 120 cycle continuous operation. The system was fed with influent of low dye concentration and high dye concentration. The results showed that the two stage SBR system was adaptable to the change of influent quality and operation conditions during the long term operation. It could efficiently remove the pollutants in the wastewater,the average dyestuff and COD removal rates were 81% to 92.5% and 89.4% to 93.1% respectively for low and high influent loading, and could produce continuous good quality effluent. In the two stage SBR system, the anaerobic sludge had the characteristics of high activity and strong pollutant degradation ability, and the aerobic sludge existed in the form of aggregate structure, which helped stabilize the effluent quality.