Application of the BioClog model for landfill leachate clogging of gravel-packed columns

A. J. Cooke, R. Kerry Rowe, J. VanGulck, Bruce Rittmann

Research output: Contribution to journalArticle

30 Scopus citations

Abstract

A numerical, multiple-species, reactive chemical transport model ((BioClog) developed to predict clogging in landfill leachate collection systems is used to interpret results from experiments conducted with gravel-packed columns permeated with landfill leachate. The model predicts changes to the microbial community and leachate chemistry, including the concentrations of volatile fatty acids, suspended biomass, dissolved calcium, and suspended inorganic solids. The calculated quantity and composition of the clog matter (biomass and mineral), along with the associated decrease in porosity, are compared to the measured values. The modelled clogging is in reasonable agreement with that observed in the gravel column experiments. By identifying and quantitatively linking many microbiological, chemical, and transport mechanisms, the model helps elucidate the phenomena controlling the rate and extent of clogging.

Original languageEnglish (US)
Pages (from-to)1600-1614
Number of pages15
JournalCanadian Geotechnical Journal
Volume42
Issue number6
DOIs
StatePublished - Dec 1 2005

Keywords

  • Biofilms
  • Clogging
  • Landfills
  • Leachate collection systems
  • Mineral precipitation

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Geotechnical Engineering and Engineering Geology

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