I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILEEQUIPMENT & SERVICESFOCUSNEW PRODUCTS + Show More

Comment

Anti-fouling pre-treatment for membranes

By Scott Jenkins |

Researchers at the Korea Institute of Science and Technology (KIST; Seoul, South Korea; www.kist.re.kr) led by Seongpil Jeong have developed a pre-treatment method for membrane distillation desalination processes that involves adding magnesium to seawater to prevent scale formation (anti-fouling) on the membrane. Adding magnesium chloride to the seawater before contact with the membrane allows Mg ions to combine with sulfate and carbonate ions present in the seawater, and thus prevent formation of calcium carbonate and calcium sulfate, which were found to be the major components of scale, the researchers say. The team also found that the added MgCl2 increased the stability of the hydrophobic membrane, thereby increasing wetting resistance. Membrane distillation desalination technology involves heating seawater to generate a vapor, which is passed through a hydrophobic membrane before condensing as fresh water. Fouling and wetting can lengthen production times for freshwater and shorten the lifespan of the membrane in the distillation process, thereby increasing the costs of freshwater production.
Related Content

ABB

The Big 6 level measurement technologies: Where to use them and why

WHITE PAPER — The Big 6 level measurement technologies: Where to use them and why Anyone who’s ever worn a tool belt knows that sometimes you have to use a tool for something it’s not designed to do. If you don’t happen to have a hammer, a heavy…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
Securing the availability of chemical processes through a long-term partnership
Metering gas in biogas plants
The Big 6 level measurement technologies: Where to use them and why
Minimizing particle breakage and mother liquor residue in technical salts production
Expectations are shifting: How measurement solutions can help overcome chemical industry challenges

View More