厌氧—好氧序列间歇式反应器处理造纸中段废水的研究

Study on Treatment of Paper Mill Wastewater by Anaerobic-Aerobic Sequencing Batch Reactors

采用厌氧—好氧序列间歇反应器—混凝沉淀组合工艺,处理碱法草浆造纸中段废水。结果表明,经8.0h厌氧搅伴处理和5.0h好氧曝气处理,进水CODCr为729.1～2239mg/L,出水CODCr小于550mg/L,CODCr去除率在66.2％～76.3％之间,再经混凝沉淀处理,出水CODCr小于200mg/L,色度小于50倍,满足国家造纸工业水污染物排放标准中的二级标准。

Study on the treatment of paper mill wastewnter by anearobic-aerobic sequencing batch reactors and coagulation sedimentation have been conducted. The results showed that when the influent COD was 729.1-2239mg/L, anearobic stiring for 8.0 h and aerobic treatment for 5.0 h, the effluent COD was lower than 550mg/L, the removal efficiency of COD was 66.2%-76.3%, and then followed by coagulation sedimentation treatment, the effluent COD was lower than 200mg/L, the effluent color index was lower than 50-fold. The COD and color index of effluent could meet the State industrial discharge standards.