This Article Full Text (PDF) References Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to Saved Citations Download to citation manager Request Permissions Request Reprints Add to My Marked Citations Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Gallagher, E. M. Search for Related Content PubMed Articles by Gallagher, E. M. Social Bookmarking                   What's this?

Biological clogging of geocomposites exposed to raw landfill leachate over an extended period

Sir Frederick Snow & Partners (NW) Ltd., Manchester, UK

Considerable savings in void space could be achieved if it were possible to demonstrate the viability of geocomposites as an alternative to stone basal draining layers in landfills. Geo composites have not been used in this context because of their susceptibility to particulate and biological clogging. There is limited data available to guide designers on the use of geocomposites exposed to landfill leachate. Double column permeameters were used to model the flow rate of six geocom posites exposed to raw landfill leachate over a 7-month period. The onset of biological clogging was rapid in all cases and, in most cases, stabilised after approximately 70 days. The equilibrium value for overall discharge/time of discharge ranged from 17 to 39% of the mitial value. The potential eco nomic and environmental benefits of a reliable alternative to stone drainage blankets justify further investigation to vali date and extend the data from this preliminary study.

Key Words: Biological clogging • algae • geocomposite • landfill • leachate • permeameter • flow behaviour • void space • drainage layer

CiteULike    Connotea    Del.icio.us    Digg    Reddit    Technorati    What's this?