Hydraulic retention time(HRT) was 24 h during the experiment,The influent COD concentration was 500,1 000,1 500,2 000 mg/L during the start-up,the COD removal reached 93.48% and kept stable after 42 days,the start-up finished.

• 进水COD浓度分别为500；1 000；1 500；2 000 mg/L；42天后COD去除率达到93.；48%25；并且保持稳定；反应器启动完成。