Well Intake Systems for SWRO Systems: Design and Limitations
Well intake systems are used globally for intakes to hundreds of medium to low capacity seawater reverse osmosis (SWRO) systems. Conventional vertical wells are the most commonly used type. Other types of well intake systems include slant wells, horizontal wells, and radial collector wells (Ranney wells). Selection of the well design type that best meets the feed water capacity requirement at a given site is based on the local hydrogeology, shoreline conditions, potential interference with other water users, and the capacity of the SWRO treatment plant. Selection of any type of well system or other subsurface intake requires that the operational risk for future performance must be carefully evaluated. Conventional vertical wells have exhibited long-term successful operation and therefore, have a low risk profile. Radial collector wells have been successfully operating for decades at locations where the hydrogeologic conditions are suitable for their use. Slant and horizontal wells are relatively new innovations as applied to use for SWRO intakes and few large-scale facilities are operating. These well types have a higher risk in terms of long term operation.
KeywordsDuplex Stainless Steel Intake System Coastal Aquifer Horizontal Well Drilling Fluid
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