First, the project analyses the quality of natural water and the influence of impurity on chemical water treatment, and then chooses the chemical water treatment technics of power plant.
本课题首先分析了自然水水质及所含杂质对化学水处理的影响，然后进行了电厂化学水处理工艺分析。
2
It introduces the methods of recovering waste acid and water with waste acid and oily impurity using the natural cooling crystallization, the dialyzing diffusing and roasting.
介绍用自然冷却结晶法、 渗析扩散法和焙烧法回收废酸及合废酸、含石油类杂质废水的处理方法。
3
The impurity defects, which caused impurity bands in the bandgap, of natural sphalerite could extend its absorbing range to the visible light wavelength range.