Full Description

This powerpoint presentation begins by providing a brief overview of the occurrence of nitrate and perchloratein California groundwater. Project objectives were to:evaluate nitrate treatment options forconversion from ISEPTM to Single Pass IonExchange at the Valley County Water DistrictArrow Lante Treatment Facility; and, provide a cost comparison of the identifiednitrate treatment options. Nitrate treatment technologies for the Valley County included: Tailored single pass ion exchange (IX);existing ISEP units; and,various blending/extraction options. Capital and operation and maintenance (O the resin is expected to becomesaturated within 24 hours;the use of regenerable ion exchange (e.g.,ISEPTM) for nitrate removal is a proventechnology and ISEPTM is already onsite; at Valley County, nitrate levels can be reducedto 8 mg/L as N by treating 33% of the totalflow through the ISEPTM;five extraction/blending scenarios wereidentified, more information is needed beforeany of the scenarios can be recommended; total costs are higher for nitrate treatment viaISEP than for blending due to the Ohowever, retention of one or both ISEP systemwas recommended to provide maximum flexibility formeeting the nitrate MCL; and,if desired, alternate extraction/blending optionscould be explored in conjunction with installingsingle pass IX and bypass piping for the ISEP. Includes tables, figures.

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Edition: Vol. - No. Published: 01/01/2008 Number of Pages: 22File Size: 1 file , 570 KB