Pseudomonas flava WD-3在人工湿地污水净化中的应用研究

为了研究Pseudomonas flava WD-3在复合垂直流人工湿地中对污水的处理效果,将其按照不同梯度接种量(菌悬液浓度为4.575×108个·mL-1)投加到复合垂直流人工湿地中,研究其对污水中氨氮、CODCr、NO-2-N、NO-3-N、总磷的去除效果,确定该菌株的最佳投加量,建立降解动力学模型.结果表明,该菌株对污水中的有机污染物以及氮磷等营养物具有明显的去除效果.菌株的最佳投加量为6.0%,且对污水中NH+4-N、COD、亚硝酸盐氮、硝酸盐氮、TP的去除效果分别为未投加该菌的1.49、1.48、1.45、1.41、1.83倍,且去除性能稳定.低温菌Pseudomonas flava WD-3对污水中各污染物的降解过程符合一级反应动力学模型.

Application of Pseudomonas flava WD-3 for the sewage purification in the artificial wetland

In order to study the wastewater treatment performance of Pseudomonas flava WD-3 in the integrated vertical-flow constructed wetland, the removal rates of NH₄⁺-N, COD_Cr, NO₂^--N, NO₃^--N and TP were studied under different bacterial dosages (with the bacterial suspension concentration of 4.575×10⁸ mL^-1), which would determine the best dosage and establish the kinetic model of degradation by the above strain. The results showed that the organic pollutants, nitrogen and phosphorus in the sewage could be efficiently removed by Pseudomonas flava WD-3. The optimal dosage of this strain was 6.0%, and the removal rates of NH₄⁺-N, COD, NO₂^--N, NO₃^--N and TP from the sewage were 1.49, 1.48, 1.45, 1.41 and 1.83 times that of control and are stable. In addition, the pseudo-first order model could fit the degradation of pollutants by Pseudomonas flava WD-3 well.