Granular activated carbon (GAC) in filter-adsorbers provides an excellent support surface for the proliferation of microorganisms. Therefore, GAC beds may release particles of carbon with attached bacteria that are protected from disinfection. In this pilot-plant study, particles were collected from the product waters of GAC filter-adsorbers, examined for bacterial colonization, and characterized by energy-dispersive X-ray analysis. Results showed that bacteria attached to GAC particles could be disinfected with chlorine if particle concentrations were in the range found in the product waters, i.e., < 20 ug/L. Increasing particle concentration tenfold interfered with disinfection efficiency. Powdered activated carbon used in pretreatment contributed to the particles found in product water. Includes 17 references, tables, figures.
| Edition : | Vol. 85 - No. 9 |
| File Size : | 1
file
, 2.6 MB |
| Note : | This product is unavailable in Ukraine, Russia, Belarus |
| Number of Pages : | 11 |
| Published : | 09/01/1993 |
