In situ microbial treatment of landfill leachate using aerated lagoons

M. K. Mehmood, E. Adetutu, D. B. Nedwell, A. S. Ball

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51 Citations (Scopus)

Abstract

The aim of this study was to assess the efficiency of leachate treatment by microbial oxidation in four connected on-site aerated lagoons at a landfill site. The landfill site was found to be in an ageing methanogenic state, producing leachate with relatively low COD (mean value 1740 mg l-1) and relatively high ammonium concentrations (mean value 1241 mg l-1). Removal of COD averaged 75%, with retention times varying from 11 to 254 days. Overall 80% of the N load was removed within the plant, some by volatilisation of ammonium. Microbial community profiling of the water from each lagoon showed a divergent community profile, presumably a reflection of the nutrient status in each lagoon. In municipal solid waste landfills under similar conditions, leachate treatment through a facultative aerobic system in which sequential aerobic and anaerobic microbial oxidations occurred can readily be achieved using a simple two-lagoon system, suggesting this technology can be economic to install and simple to run.

Original languageEnglish
Pages (from-to)2741-2744
Number of pages4
JournalBioresource Technology
Volume100
Issue number10
DOIs
Publication statusPublished or Issued - May 2009
Externally publishedYes

Keywords

  • Aeration lagoons
  • Effluent treatment
  • Landfill leachate
  • Microbial treatment of leachate

ASJC Scopus subject areas

  • Bioengineering
  • Environmental Engineering
  • Waste Management and Disposal

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