It requires change with changes in feed water quality conditions, the decolorization effect of hydrophilic poor, COD removal rate.

缺点是需随着水质变化改变投料条件，对亲水性染料的脱色效果差，cod去除率低。

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This is particularly important in the columns in the cold side of the plant because frequent changes had been made to feed rate, feed-composition, product values and utility costs.

由于进料量、进料成分、产品价值以及公用物料频繁地发生了变化，因此，在装置冷侧的塔中进行这种变化尤为重要。

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This is particularly important in the columns in the cold side of the plant because frequent changes had been made to feed rate, feed-composition, product values and utility costs.

由于进料量、进料成分、产品价值以及公用物料频繁地发生了变化，因此，在装置冷侧的塔中进行这种变化尤为重要。

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