Cleaning and Regeneration of Membranes

✍ Scribed by Ren Deqian

• Book ID: 103056600
• Publisher: Elsevier Science
• Year: 1987
• Tongue: English
• Weight: 574 KB
• Volume: 62
• Category: Article
• ISSN: 0011-9164
• DOI: 10.1016/0011-9164(87)87037-6

✦ Synopsis

Contaminated

membranes used for reverse osmosis or ultrafiltration were cleaned and regenerated by both physical and chemical methods. Physical processes included foam-ball swabbing, various methods of water rinsing, gas-liquid cleaning, ultrasonic (or subsonic) treatment and an electric vibration method. Chemical treatment consisted mainly of cleaning with various inorganic or organic reagents, for example, various oxygen-reducing reagents, detergents and complex compounds, which are capable of removing scale from the membrane.

If the loss of efficiency of the membrane is due to a needle hole which cannot be repaired by conventional methods, a suitable liquid for repairing the membrane must be selected.