高铁酸钾溶胞联合A/O-MBR工艺污泥减量研究

Research on sludge reduction of potassium ferrate lysis combined with A/O-MBR process

结合高铁酸钾(K2FeO4)溶胞技术和A/O-MBR工艺在污泥减量方面的优势,在掌握K2FeO4溶胞对污泥性质影响基础上,将K2FeO4溶胞技术应用于A/O-MBR工艺,构建A/O-MBR+K2FeO4溶胞组合工艺.采用序批式实验研究K 2FeO 4溶胞对污泥性质影响,结果表明,溶胞后污泥固相SS和VSS降低,液相中COD、TN和TP质量浓度明显升高.平行运行对照A/O-MBR工艺和A/O-MBR+K2FeO4溶胞组合工艺,结果表明,A/O-MBR+K2FeO4溶胞组合工艺的污泥表观产率为0.10 kgSS/kgCOD removed,明显低于对照A/O-MBR工艺(0.22kgSS/kgCOD removed),产生显著的污泥减量效果(54.5%);同时,与对照A/O-MBR工艺相比,A/O-MBR+K2FeO4溶胞组合工艺的COD去除效果变化不大,TN去除率升高,TP去除率降低。

Combining the advantages of potassium ferrate(K2FeO4)lysis and A/O-MRR process in sludge reduction,based on mastering of the influence of K2FeO4 lysis on sludge properties,it was proposed to apply K2FeO4 lysis to A/O-MBR process,and to develop A/O-MBR+K2FeO4 lysis combined system.The influence of K2FeO4 lysis on sludge properties was studied by batch experiment.The results showed that the SS and VSS of sludge decreased after lysis,and the concentrations of COD,TN and TP in the liquid phase increased significantly.Parallel operation of A/O-MBR and A/O-MBR+K2FeO4 lysis combined system.The results showed that the apparent sludge yield of A/O-MBR+K2FeO4 lysis combined system was 0.10 kgSS/kgCOD removed,significantly lower than that of control A/O-MBR(0.22 kgSS/kgCOD removed),resulting in a significant sludge reduction efficiency(54.5%).At the same time,compared with A/O-MBR,the COD removal efficiency of A/O-MBR+K2FeO4 lysis combined system was almost identical,the TN removal efficiency and the TP removal rate of A/O-MBR+K2FeO4 lysis combined system were increased and decreased,respectively.