Water. desalination + reuse

RESEARCH February-March 2014 | Desalination & Water Reuse | 31 | from using Genesol 704 alone. Using the same air generation method – the Genairator – with commodity chemicals led to an increase in foulant removal of just 5-10%. Genesys presented two papers on these findings as part of the launch of Genairclean at IDA Tianjin, in October 2013. Max Fazel presented his paper Autopsy results confirm safe and effective use of microbubbles for removal of RO membrane fouling. And research chemist Rachel Wilson presented Air bubbles enhance membrane cleaning: a future perspective. Both papers are on www.genesysro. com in the 'Free downloads' section. OngOing fiEld tESting The cost of cleaning an RO plant is generally calculated based on the cost per kilogramme of the chemicals used. Factors such as dose rate, cleaning frequency and impact on operation are often ignored due to the difficulties in measuring them over an extended period. From the initial field testing of the Genairclean system, Genesys wanted to determine the true, long-term cost reductions that could result from : • Quicker cleaning times • Optimised plant efficiency • Lower cleaning frequency. Steve Chesters will be presenting case studies from these field trials at the 2014 Membrane Technology Conference and Exhibition in Las Vegas, during 10-14 March. COnCluSiOnS • Cleaning with microbubbles causes no damage to membranes. • The size and action of bubbles is strongly dependent upon the cleaning chemicals used. The bubbles created in the presence of Genesol 704 are dramatically smaller than those that form in the presence of commodity cleaners or using only water and air, and spread more evenly. • Genairclean's dual-cleaning approach results in increased turbulence at the boundary layer with no extra energy consumption. • The Genairclean system removes foulants significantly faster and more effectively than traditional cleaning methods. l 8 in Pilot Plant for membrane compatibility and clean-in-place tests dOn't fORgEt All main articles published in Desalination & Water Reuse since 2009 are available online a few weeks after the magazine reaches readers. Just go to www.desalination.biz and access the Magazine Articles menu button. To go back further than the last 20 articles, click Archives on the Magazine Articles page. Note that due to space limitations, many items in D&WR are reduced in length from their initial web publication. More information on articles appearing in other departments in the magazine (eg, Contracts, Project Progress, Research News, Showcase etc) can often be found by searching using the panel on the home page. WATCH WWW.DESALINATION.BIZ FOR THE LATEST IN DESALINATION & WATER REUSE! D&WR

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