Reverse-osmosis (RO) and deionization (DI) are common water purification steps.

反渗透（RO）和去离子（DI）是通用的水纯化步骤。

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Reverse osmosis (RO) membrane separation technology is used more and more widely in water treatment, and much attention has been paid to the fouling of the RO membrane.

反渗透膜分离技术在水处理中的应用越来越广泛，膜污染也日益受到重视。

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This paper gives a new way to determine the COD in reverse osmosis (RO) water.

本文介绍了用紫外分光光度法测定ro产水的COD值的方法。

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