Slow sand filters amended with anionic resin and granular activated carbon (GAC) achieved significantly higher (more than 75 per cent) removals of organic carbon and trihalomethanes formation potential during an 89-day pilot plant filter run than any othe
| Title | Using granular media ammendments to enhance NOM removal |
| Publication Type | Journal Article |
| Year of Publication | 1996 |
| Authors | Collins, MR, Eighmy, TT, Fenstermacher, JM, Spanos, SK |
| Pagination | p. 48-61 : 9 fig., 7 tab. |
| Date Published | 1996-12-01 |
| Publisher | American Water Works Association |
| Keywords | activated carbon treatment, organic carbon, pilot plants, resins, sdiwat, slow sand filtration, trihalomethanes |
| Abstract | Slow sand filters amended with anionic resin and granular activated carbon (GAC) achieved significantly higher (more than 75 per cent) removals of organic carbon and trihalomethanes formation potential during an 89-day pilot plant filter run than any other filter media combination studied. There was no significant difference in removal rate with GAC used as a surface or sublayer amendment. Treatment efficiencies of the aluminum oxide-, anthracite, and clinoptilolite-amended slow sand filters could not be clearly distinguished from conventional slow sand filters with precursor removal of less than 25 per cent. Organic precursor removal by slow rate filters was considered a function of both the microbiological maturity and adsorptive capacity of the schmutzdecke and filter bed. Enhanced removal of by resin- or GAC-amended slow sand filters will eventually require the use of deeper amendment layers or frequent replacement or regeneration of the exhausted amendment. |
| Notes | 28 ref. |
| Custom 1 | 255.1 |
