Full Description

Pilot studies are often necessary to evaluate the feasibility of GAC adsorption with regard to specific treatment goals. The objective of this paper is to discuss important considerations about the design and evaluation of GAC pilot studies; specifically, typical results and problems that might be encountered will be discussed. When evaluating pilot and full scale GAC performance data, important information about the removal mechanisms that take place in GAC columns can be determined: When removing trace organic compounds from natural waters, background organic matter (BOM) can displace the target compound leading to lower capacities in the top portion of a downflow GAC column; Preloading by BOM can reduce the number of accessible adsorption sites leading to lower capacities in the lower reaches of a downflow GAC column; The EBCT of a GAC adsorber can be too short to effectively contain the entire mass transfer zone of the target compound leading to high CURs; To determine the effectiveness of biological activity in GAC filters, pilot studies need to be run for a sufficiently long time; Ozonation may or may not increase the biodegradable fraction of organic carbon.

Product Details

Published: 01/01/1994 ISBN(s): 0898677750 Number of Pages: 11File Size: 1 file , 400 KB