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。
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.
这个组织同样对从这些源头释放出的颗粒污染水平进行了研究。 它们由极小的固体和液体颗粒组成。
The group also studied particle pollution levels emitted from these sources, which are made up of a mix of tiny solid and liquid particles in the air.
湿式洗涤器是用来消除气体污染物和固体颗粒，而在同一时间的冷却气体。
Wet scrubbers are used to remove gaseous pollutants and solid particles while cooling the gas at same time.
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