How to judge the pollution judgment method of RO membrane element of industrial reverse osmosis pure

How to judge the pollution judgment method of RO membrane element of industrial reverse osmosis pure water equipment?

by:Ocpuritech     2021-04-06
How to judge the pollution judgment method of RO membrane element of industrial reverse osmosis pure water equipment? Author of the article: Now, in the water environmental protection industry, 'film' is one of the popular products, popular at the same time is accompanied by the use of. If there are too many applications, membrane products will also be contaminated. This kind of membrane fouling is inevitable in the membrane separation process. Even membrane products with strong anti-fouling ability will accidentally 'suffer'. Today, I will talk about how the recent hot RO membrane prevents pollution. Let's first understand how to judge that the RO membrane element of the industrial reverse osmosis pure water equipment you use is contaminated. 1. Changes in membrane flux. Under the same operation, if there is a gap in membrane flux, that is to say, the flux of the old membrane is lower than 85% of the flux of the new membrane, your membrane may be membrane fouled. 2. The retention of the membrane becomes worse. In other words, the increase or decrease of the membrane retention performance of the RO membrane during the working process may be caused by membrane fouling. 3. The pressure difference of the membrane module changes. If the membrane resistance increases during operation, membrane fouling occurs. So how to prevent RO membrane pollution? 1. Influent water is pretreated. The filter device can be simply set up before using the RO membrane, which can also extend the life of the membrane. 2. Lower the pH of the influent water. The pH of the influent water affects the properties such as the charge of the solute, and also affects the characteristics of the membrane surface. Adjusting the pH of the influent water to 6.1-6.5 and monitoring with a pH meter can better reduce the pollution to the membrane. 3. Regular membrane cleaning. In fact, scale inhibitors can be used to prevent the precipitation of silica and calcium, barium, and strontium sulfates in the influent water. Membrane cleaning can use chemical cleaning to remove the covering on the membrane surface, and regular cleaning can prolong the service life of the RO membrane.
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