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 language | English |
|---|---|
| Pages (from-to) | 2741-2744 |
| Number of pages | 4 |
| Journal | Bioresource Technology |
| Volume | 100 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published or Issued - May 2009 |
| Externally published | Yes |
Keywords
- Aeration lagoons
- Effluent treatment
- Landfill leachate
- Microbial treatment of leachate
ASJC Scopus subject areas
- Bioengineering
- Waste Management and Disposal
- Environmental Engineering
- Renewable Energy, Sustainability and the Environment