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Regenerating an Arsenic Removal Iron-Based Adsorptive Media System, Part 1: The Regeneration Process
Citation:
Sorg, T., A. Chen, L. Wang, AND R. Kolisz. Regenerating an Arsenic Removal Iron-Based Adsorptive Media System, Part 1: The Regeneration Process. JOURNAL OF AMERICAN WATER WORKS ASSOCIATION. American Water Works Association, Denver, CO, 109(5):13-24, (2017). https://doi.org/10.5942/jawwa.2017.109.0045
Impact/Purpose:
This paper, of a two part series, describes the regeneration process and its effectiveness to strip the arsenic and other contaminants from an exhausted media. This provides information to small drinking water systems requiring arsenic removal.
Description:
Adsorptive media technology is a frequently used method of removing arsenic by small water systems because of its simplicity and efficiency. Current practice is to replace the media when it no longer reduces arsenic below the USEPA drinking water maximum contaminant level (MCL) of 10 µg/L. Media replacement typically accounts for approximately 80% of the total operational and maintenance (O/M) costs. This cost can be substantial and cost prohibitive for many small systems. One potential option to reduce the cost is on-site regeneration and reuse of the media. To evaluate the regeneration option, three consecutive regeneration studies were conducted on a full scale 295 gpm arsenic removal adsorptive media system. This paper, of a two part series, describes the regeneration process and its effectiveness to strip the arsenic and other contaminants from an exhausted media. The results of the regeneration studies found that a three step regeneration process of media backwash, caustic regeneration and acid neutralization/conditioning is very effective for stripping arsenic and other contaminants from the exhaustive media of a full scale arsenic removal system
URLs/Downloads:
DOI: Regenerating an Arsenic Removal Iron-Based Adsorptive Media System, Part 1: The Regeneration Process
REGENERATING ARSENIC REMOV IRON-BASED ADSORP MEDIA SYS, PT. 1
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