Comments on: Middle East desalination: It’s important to clean up the brine after desalination, says editorial; plus more details on Middle Eastern desalination procedures http://aquafornia.com/archives/9486 The California Water News blog! Fri, 10 Feb 2012 05:48:00 -0800 hourly 1 By: R. Varadan http://aquafornia.com/archives/9486/comment-page-1#comment-30771 R. Varadan Thu, 20 May 2010 06:01:34 +0000 http://aquafornia.com/?p=9486#comment-30771 We are having M/s Toray make RO membaranes. What the specifications of Anti scalants and Anti oxidants and Polyelectrolyte. We are going have sea water RO. The sea water is having conductivity 45000us/cm and Turbidity of 20-40NTU. Ferric chloride is going to used as floculant along with polyelectrolyte in the pretreatment process. With regards We are having M/s Toray make RO membaranes. What the specifications of Anti scalants and Anti oxidants and Polyelectrolyte.
We are going have sea water RO. The sea water is having conductivity 45000us/cm and Turbidity of 20-40NTU. Ferric chloride is going to used as floculant along with polyelectrolyte in the pretreatment process.

With regards

]]> By: H2AU http://aquafornia.com/archives/9486/comment-page-1#comment-15721 H2AU Tue, 07 Jul 2009 06:37:37 +0000 http://aquafornia.com/?p=9486#comment-15721 These are interesting observations in the Gulf region, however they are the exception rather than the norm. Firstly, the majority of new desalination capacity being installed uses the seawater reverse osmosis (SWRO) process, which does not significantly raise the temperature of the processed water. Secondly, some chemicals are used in the SWRO process (depending on the site and application), however not in significant quantities, and typically they are FDA approved, and easily neutralised before discharge with the brine reject. Furthermore, considering the location of the Gulf, it is not an area of open ocean, so the brine may have a tendancy to concentrate in the local area of each plant's brine discharge if ocean currents are not able to dilute the brine and carry it away. Brine ploom modelling is necessary during project planning, to determine the optimum brine discharge position and diffusion. Compare this with a modern SWRO plant, close to open ocean. The brine diffuser at the Kwinana desalination plant (Perth, Australia) enables the salty brine to be diluted and returns to normal seawater concentration within just a few square metres of the site. In fact, even on the brine diffuser there is evidence of a thriving marine ecosystem. A video is available here: www.watercorporation.com.au/_files/mmedia/Under_the_Surface_small.wmv These are interesting observations in the Gulf region, however they are the exception rather than the norm.

Firstly, the majority of new desalination capacity being installed uses the seawater reverse osmosis (SWRO) process, which does not significantly raise the temperature of the processed water. Secondly, some chemicals are used in the SWRO process (depending on the site and application), however not in significant quantities, and typically they are FDA approved, and easily neutralised before discharge with the brine reject.

Furthermore, considering the location of the Gulf, it is not an area of open ocean, so the brine may have a tendancy to concentrate in the local area of each plant’s brine discharge if ocean currents are not able to dilute the brine and carry it away. Brine ploom modelling is necessary during project planning, to determine the optimum brine discharge position and diffusion.

Compare this with a modern SWRO plant, close to open ocean. The brine diffuser at the Kwinana desalination plant (Perth, Australia) enables the salty brine to be diluted and returns to normal seawater concentration within just a few square metres of the site. In fact, even on the brine diffuser there is evidence of a thriving marine ecosystem. A video is available here: http://www.watercorporation.com.au/_files/mmedia/Under_the_Surface_small.wmv

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