What Temperature Cleaning Solution Should Be Used to Clean Membranes

3 What Temperature Cleaning Solution Should Be Used to Clean Membranes  

Membranes should be cleaned at as high a temperature and at pH extremes as recommended by the manufacturer (see Chapter 13.2.2). Studies have indicated that cleaning under these conditions removes more scale and foulants than cleaning at ambient temperature and neutral pH (see Chapters 13.2.3.1 and 13.2.3.3). However, cleaning outside the recommended temperature and pH parameters leads to 

4 Can Extended Soak Time Compensate for Cleaning at Lower Temperature, for Example, When the Heater is Not Working  

Cleaning at lower temperatures is not recommended. Cleaning solutions are typically not effective at ambient temperatures and some components of the solution may even precipitate at these temperatures. Hence, a longer soak will not compensate for cleaning at lower temperatures. In fact, during extended soak periods at higher temperatures, a slow recirculation is recommended to maintain temperature. 

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