进水分配比对倒置A^2/O-MBR系统处理低C/N废水效果的影响研究

Research on Influence of Water Distribution Ratio on Treatment Effect of Low C/N Waste by Inverted A^2/O-MBR System

由于倒置A^2/O工艺中氮、磷元素的去除无法同时达到较好的去除水平,因此对传统的倒置A^2/O进一步改进,与MBR相结合并且维持污泥与进水配比,探究多种进水配比对脱氮除磷的影响。结果表明:在进水配比为6∶4时,得到的处理结果较好,其中COD、NH4^+-N、TN以及TP的平均出水质量浓度和平均去除率分别为:13.64、0.68、20.7、1.16 mg·L^-1和91.43%、98.3%、48.26%、71%。进水分配比对TN和TP的去除有明显影响,通过合理的改变进水分配比,能够使氮、磷元素同时保持较好的去除率。

Because the removal of nitrogen and phosphorus in the inverted A^2/O process cannot achieve a good removal level at the same time. Therefore, the traditional inverted A^2/O was further improved, combined with MBR and maintaining the ratio of sludge to influent, the effect of water distribution ratio on nitrogen and phosphorus removal rates was investigated. The results showed that, when the water distribution ratio was 6∶4, the treatment results were good. The average effluent mass concentrations and average removal rates of COD, NH4^+-N, TN, and TP were 13.64, 0.68, 20.7,1.16 mg·L^-1 and 91.43%, 98.3%, 48.26%, 71%. The influent water distribution ratio had significant effect on the removal of TN and TP. By reasonably changing the influent water distribution ratio, it is possible to maintain a good removal rate of nitrogen and phosphorus elements.