pretreatment of water

It showed that biological pretreatment of polluted source water was effective and without side-effect specially in removing ammonia nitrogen, phenol and organic contaminants.

分析结论是，污染源水的生物法预处理是一种经济有效且无副作用的方法，其本质是水体天然自净过程的人工化，对NH3-N、酚和有机物，具有较满意的去除效率。

The primary sedimentation tank is the pretreatment construction of secondary waste water treatment plant, and the main construction of first waste water treatment process.

初沉池是二级污水处理厂的预处理构筑物，一级污水处理厂的主要构筑物。

On the BOD_5/ COD_ ( Cr) ratio's effect on the performance of artificial YDT and PMT media packaged contact oxidation tank for raw water pretreatment

人工YDT及PWT填料接触氧化池生物预处理效果与原水BOD5/COD（Cr）的关系

With water from East Lake as raw water, different intensity of light and radiation time were combined in the UV light pretreatment of raw water so as to improve the effect of algae-removal, and the following process is bar flocculation, air flotation.

以武汉东湖水为原水，采用不同的光强和照射时间组合，对原水进行紫外光预处理来加强除藻效果，后续工艺为栅条絮凝、气浮。

Diatomaceous earth filtration as effective pretreatment for preparation of high-purity water

高纯水制备的有效预处理&硅藻土过滤

Water Quality Fluctuation and Biological Pretreatment of Luanhe River Water Diverting to Tianjin City

天津引滦水的水质变化特征与生物预处理试验研究

Experimental study on pretreatment of micro-polluted water by new biological reactor

新型生物反应器对微污染水预处理的试验研究

Study on biological pretreatment of eutrophic lake water

富营养化湖泊水生物预处理研究

Experimental research on pretreatment of polluted raw water with higher turbidity and higher ammonia-N concentration by biological contact oxidation process ( BCOP) with elastic packing was conducted and compared with conventional water treatment process.

采用生物接触氧化技术预处理微污染原水，并和水厂常规处理工艺进行了对比。

The difference of the percentage of pollen moisture between 1 hour treatment and pretreatment is statistically significant up to 1%. The pollen tended to lose water smoothly after being dried 2 hours.

干燥处理第1个小时，花粉水分散失最快，其花粉含水量与处理前花粉含水量比较的差异达1%极显著统计水准，而处理2h后花粉水分散失趋于平缓。