We study how to control the solid grain, microorganism and water quality of tap water, and put the research about the solid grain contamination into emphasis.
本文对自来水固体颗粒污染物、微生物和硬度等三种主要污染物的控制方法进行了研究，其中着重研究了固体颗粒污染物的控制理论和方法。
This article has dealt with the selection of grease removal, phosphating residue removal and purified water generating equipment, and the control of dropping time and angles, and grease contamination.
介绍了涂装前处理设备中除油、磷化除渣、纯水设备的选择，滴液时间、滴液角度、油污染的控制。
The paper discussed the extraction of chitosan and the applications of chitosan to the control of the environmental pollution, such as the industrial foul water and the radioactive contamination.
对壳聚糖的提取和它在工业污水、核污染等方面的环境污染防治上的应用进行了讨论。
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