Factors affecting leachate and gas carbon loadings at the Vancouver landfill site at Burns Bog
Conference
·
OSTI ID:398184
Landfill gas represents either a potential energy source when recovered and modified, or a significant contributor to the build-up of greenhouse gases in the troposphere when released. An analysis of short-term and long-term variation in landfill gas production and composition and leachate characteristics in response to fluctuations in temperature, barometric pressure and precipitation was undertaken at the Burns Bog Site located in Delta, B.C. Gas composition (%CH{sub 4}, %CO{sub 2}, %O{sub 2}, %C{sub 2}H{sub 4}) and production measurements were undertaken at individual wells spanning the entire active gas producing area of the site, in addition to measurements from the header lines. Leachate samples were obtained from the pumping station of the collection ditch, and analyzed for the parameters of interest (COD, VFA, TOC, pH, NH{sub 4}{sup +}{minus}N). Preliminary results indicate that precipitation is the predominant factor affecting gas composition, with high CH{sub 4} and relatively low CO{sub 2} production following periods of heavy rainfall. This is most likely due to increased methanogenesis under the enhanced anaerobic conditions, in addition to the dissolution of CO{sub 2} and release in the leachate. The relative production of the key parameters of the gas and leachate were analyzed in order to determine possible effects of the measured climatic factors on this balance. Spatial and temporal trends in the production and composition of the landfill gas are highlighted in order to augment present understanding of the decomposition process of the refuse following burial, and the management practices which may lead to its optimization.
- OSTI ID:
- 398184
- Report Number(s):
- CONF-9511137--; ISBN 1-880611-03-1
- Country of Publication:
- United States
- Language:
- English
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