上流式曝气生物活性炭塔(BAC )中的废水、空气从下往上流过生物活性炭层.为研究废水中有机物沿活性炭层的降解规律 ,生物活性炭塔由下至上共设有10个废水取样口 ,研究沿程各区间段对有机物的降解差异.试验结果表明在水力负荷为5 .02~10 .04 L/(m2 ·min ) ,气水比为4:1~6:1时 ,COD、UV、色度的脱除主要集中在塔的中下部 ,占总脱除率70% 以上.进水废水浓度对脱色率影响不大 ,对COD的脱除率有影响 ,进水废水浓度过大 ,脱除率降低.依据推流反应器模型 ,推导出废水净化塔中COD的降解动力学方程 :Ce= Co exp(-2 .406 4 H/L0 .962 ).%The coking wastewater and gas in biological activated carbon aerated tower flow downward to upward through the BAC layer .In order to study its characteristics of coking wastewater degradation along BAC layer ,ten sampling sites are set up to research different characteristics of organic degradation in each section .The result indicates when hydraulic loading is 5 .02~10 .04 L/(m2·min) ,ratio of air and water is 4:1~6:1 ,COD and UV as well as chromaticity is mainly removed in the lower portion of the tower ,covering above more than 70% of the total removal .Coking wastewater concentration has lit-tle influence on the chromaticity removal rate ,but influence on the removal rate of COD and when coking wastewater con-centration is too high ,the removal rate will be reduced .Based on plug-flow reactor model ,the kinetics equation of COD degradation is derived as Ce= Coexp(-2 .406 4 H/L0 .962 ) .
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