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Effect of hydraulic retention time on landfill leachate and gas characteristics

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Title: Effect of hydraulic retention time on landfill leachate and gas characteristics
Author: Munasinghe, Ranjani
Degree Doctor of Philosophy - PhD
Program Civil Engineering
Copyright Date: 1997
Abstract: Previous field studies carried out in order to characterize leachate in Vancouver, B.C. landfills show an effect of water input patterns on leachate characteristics. With high rainfall into the landfills, high volatile fatty acid (VFA) concentrations appear in leachate. It is postulated that with high rainfall there is a reduction in hydraulic retention time (HRT) which results in a reduction in the conversion of VFA to CH4 and CC>2- Coincidence of peak infiltration rates with high dissolved organic carbon concentrations greatly increases the pollutant loadings to the treatment plants. The objective of the study was to investigate the effects of HRT on landfill leachate and gas characteristics. HRTs from 3 to 200 days were assigned to eighteen lab scale lysimeters during four experimental phases in which the HRT was changed by changing the infiltration rates through the lysimeters. A relationship was established between HRT and infiltration rate in refuse columns and tested using tracer studies. [Additional abstract]
URI: http://hdl.handle.net/2429/7444
Series/Report no. UBC Retrospective Theses Digitization Project [http://www.library.ubc.ca/archives/retro_theses/]

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