水纯化系统可能跟随在初始的预处理步骤后面，根据水规格参数的不同有多种顺序和系统设计。
Water purification systems may follow the initial pretreatment steps in various sequences depending on the characteristics of the water and the design of the system.
进行了立体网状填料生物接触氧化法预处理受污染水库水的中试试验，并分析了该填料在生物接触氧化法中的特点。
With a pilot scale test, the pretreatment of polluted reservoir water by biological contact oxidation process with three-dimensional web-like media was carried out.
利用对玉米胚芽的水热预处理，使其中天然存在的酶失活并使结构疏松，油路疏通。
By applying hydrothermal pretreatment of corn germ, it was possible to inactive native enzymes present in the germ and loosen its structure.
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