About multiplex channel, a large number of problems frequently happened in protection cooperating between channel and diplex equipment.

而复用通道中，在保护与通道的配合上屡屡出现问题，通道设备双重化的问题也日趋严重。

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But there are still much disadvantage in the process whether in the single or diplex sludge system, such as the low NO3- yield and carbon source utilization, NO3- provide and so on.

但是，现有反硝化除磷脱氮工艺无论是单泥还是双泥系统都存在各自的缺点和不足，主要表现为硝化段硝酸盐产率低、处理系统自产硝酸盐供给不足、碳源利用率低、处理效果不稳定等。

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But there are still much disadvantage in the process whether in the single or diplex sludge system, such as the low NO3- yield and carbon source utilization, NO3- provide and so on.

但是，现有反硝化除磷脱氮工艺无论是单泥还是双泥系统都存在各自的缺点和不足，主要表现为硝化段硝酸盐产率低、处理系统自产硝酸盐供给不足、碳源利用率低、处理效果不稳定等。

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