By depth filtration of suspended material in effluent after treatment using contact filtration process, the total Zn and Cd concentration in the effluent discharge can be dropped to 1.
通过接触过滤技术在冶金化工污水处理工艺中的应用，对处理后浓密废水所含悬浮物进行深度过滤，使处理后排放废水中的总锌、总镉浓度分别降到1。
Cheap sand was used as filtration material in the biological contact oxidation filter to study the effects of fe removal under different conditions.
以廉价的河砂为滤料，研究了接触氧化装置对铁的去除效果。
The concept of contact flocculation was originated from direct filtration, which refers to flocculation among suspended particles in the presence of contact media.
接触絮凝的概念源于直接过滤，是指介质存在时的絮凝作用。
The concept of contact flocculation was originated from direct filtration, which refers to flocculation among suspended particles in the presence of contact media.
接触絮凝的概念源于直接过滤，是指介质存在时的絮凝作用。
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