AWWA WQTC60760

East Cherry Creek Valley Water & Sanitation District (ECCV), Colorado, is planning an initial 10-mgd desalination facility that at build-out of 40-mgd would be one of the largest inland desalination facilitiesin the United States. This study evaluated the use of low-pressure reverse osmosis (RO) membranes as a cost-effective means to treat inland brackish groundwater to supplement ECCV's current and futuredemands. Pilot study objectives were to:determine RO system operating parameters applicable to full-scale systems;verify performance for pre-selected RO membranes;evaluate fouling and scaling potential of Beebe Draw well water;evaluate process pretreatment requirements;provide RO system orientation for ECCV staff; and,determine acceptable blend of RO permeate water with raw well water toachieve taste and odor goals for distribution system water. Key criteria investigated include pretreatment requirements (antiscalantselection and acid feed requirements), operating pressures and productivity measured by mass transfercoefficient (MTC, gfd/psi), rejection performance, blend water quality, and concentrate water quality.Membranes were operated at a high product water recovery of 85% throughout the study. The ECCV ROpilot study used Beebe Draw groundwater from an existing well in Lochbuie, Colorado. This site waschosen for the RO pilot study because the well provides a reliable water supply with water quality typicalof the Beebe Draw aquifer. ECCV is evaluating potential well sites that will be in proximity to the wellwith similar water quality characteristics. Includes 4 references, tables, figures.

Product Details

Edition:

Vol. - No.

Published:

11/15/2004

Number of Pages:

19

File Size:

1 file , 880 KB