通过控制溶解氧的浓度，去除的硫化物几乎全部转化为单质硫，硫酸盐的生成率小于10%。

The removed sulphide almost was converted to element sulfur and the sulfate production was less than 10% by changing the oxygen concentration.

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最后，针对污水处理的动态复杂性，选择曝气过程的溶解氧浓度作为研究对象进行了控制算法的研究。

Finally, in view of the complexity of sewage treatment, select the dissolved oxygen (DO) of aeration process as the research object of control algorithm.

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本文通过对曝气池需氧量及其分布规律的探讨，运用传氧理论提出了分段控制曝气池溶解氧浓度的设计概念。

Studying the distribution of oxygen demand over the aeration tank a design concept of sectional control of the DO concentration was proposed on the basis of oxygen transfer in wastewater.

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