Regenerating an Arsenic Removal Iron-Bed Adsorptive Media System, Part 1: The Regeneration Process
| Autor: | Thomas J. Sorg, Lili Wang, Abraham S.C. Chen, Raymond Kolisz |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Waste management
0208 environmental biotechnology chemistry.chemical_element 02 engineering and technology General Chemistry 010501 environmental sciences Reuse Contamination 01 natural sciences Stripping (fiber) Article 020801 environmental engineering chemistry Scientific method Maximum Contaminant Level Environmental science Water treatment Regeneration (ecology) Arsenic 0105 earth and related environmental sciences Water Science and Technology |
| Zdroj: | Journal - American Water Works Association. 109(5) |
| ISSN: | 0003-150X |
| Popis: | Adsorptive media technology is frequently used by small water systems to remove arsenic because of its simplicity and efficiency. Current practice is to replace the media when it no longer reduces arsenic below the maximum contaminant level of 10 μg/L that the US Environmental Protection Agency has set for drinking water. Media replacement typically accounts for approximately 80% of the total operational and maintenance costs. One potential option to reduce the cost is onsite regeneration and reuse of the media. To evaluate the regeneration option, three consecutive regeneration studies were conducted on a full-scale adsorptive media system. This article, the first of a two- part series, describes the regeneration process and its efficacy in stripping arsenic and other contaminants from exhausted media. Study results found that a three- step regeneration process of media backwash, caustic regeneration, and acid neutralization conditioning proved effective for stripping arsenic and other contaminants from the exhausted media. |
| Databáze: | OpenAIRE |
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