Successful antiscalant field trial - Optimization at higher pH and seawater temperature - Larnaca Desalination Plant
Dutoy, F.; van der Wal, W. (2011). Successful antiscalant field trial - Optimization at higher pH and seawater temperature - Larnaca Desalination Plant. Desalination and Water Treatment 31(1-3): 311-319. dx.doi.org/10.5004/dwt.2011.2364
In: Desalination and Water Treatment. Taylor & Francis: London. ISSN 1944-3994; e-ISSN 1944-3986, meer
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| Author keywords |
Antiscalant; Chemicals; Scaling inhibition; Magnesium hydroxide; Calciumcarbonate; SWRO; Desalination; Reverse osmosis; Membrane |
| Auteurs | | Top |
- Dutoy, F.
- van der Wal, W.
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| Abstract |
A desalination plant has been operating for a number of years at elevated pH both at the first and second reverse osmosis stages at feed seawater temperature up to 30 degrees C. The main reason for operating at higher pH was to enhance the boron rejection capability of existing membranes and thus omit the operation of the second stage whenever lower seawater temperatures allow to do so and subsequently produce more water with less energy. However, a higher pH in conjunction with high seawater temperatures creates conditions for membrane scaling. Therefore an appropriate cost effective antiscalant has to be used at minimum dose level. This paper describes field trials of selecting and applying an appropriate antiscalant and the dosing optimisation process in function of feed seawater temperature and pH. |
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