Now showing documents 21-30 of 53
Can soil gas profiles be used to assess microbial CH4 oxidation in landfill covers?
Abstract: A method is proposed to estimate CH(4) oxidation efficiency in landfill covers, biowindows or biofilters from soil gas profile data. The approach assumes that the shift in the ratio of CO(2) to CH(4) in the gas ...
Modeling methane migration and oxidation in landfill cover materials with TOUGH2-LGM
Abstract: Methane oxidation within a Passive Methane Oxidation Barrier (PMOB) and the downward migration of molecular O2, whose presence is necessary for the oxidation reaction to occur, were simulated using the finite ...
Measurement of gas diffusion through soils: Comparison of laboratory methods
Abstract: Gas movement through soils is important for ecosystems and engineering in many ways such as for microbial and plant respiration, passive methane oxidation in landfill covers and oxidation of mine residues. ...
Predicting the diversion length of capillary barriers using steady state and transient state numerical modeling: Case study of the Saint-Tite-des-Caps landfill final cover
Abstract: Covers with capillary barrier effect (CCBE) have already been proposed to meet regulatory requirements for landfill final covers. Modeling of CCBE may be a relatively complex and time consuming task. Simpler, ...
Assessment of the design of an experimental cover with capillary barrier effect using 4 years of field data
Abstract: One important step in the design of inclined covers with capillary barrier effect (CCBE) is the determination of the water diversion length (DL). Numerical simulations can predict the DL more precisely than ...
Effect of composts, nitrogen salts and NPK fertilizers on methane oxidation potential at different temperatures
Other titre : Effects of compost, nitrogen salts and fertilizers on methanotrophic activity
Abstract: The effects of compost, nitrogen salts, and nitrogen-phosphorous-potassium (NPK) fertilizers on the methane oxidation potential (MOP) of landfill cover soil at various temperatures were assessed. For this, we ...
Evaluating methane oxidation efficiencies in experimental landfill biocovers by mass balance and carbon stable isotopes
Abstract: Biocovers are an alternative for mitigating fugitive and residual emissions of methane from landfills. In this study, we evaluated the performance of two experimental passive methane oxidation biocovers (PMOBs) ...
Water retention curve and hydraulic conductivity function of highly compressible materials
Other titre : Courbe de rétention d’eau et fonction de conductivité hydraulique des matériaux hautement compressibles
Abstract: A model capable of describing the suction-induced consolidation curve (void ratio function) and water retention curve (WRC) of highly compressible materials (HCM) is developed, validated and finally applied to ...
Biotic methane oxidation within an instrumented experimental landfill cover
Other titre : Methane oxidation within an experimental landfill cover
Abstract: An experimental landfill cover composed of a mixture of sand and compost was installed at the St-Nicéphore landfill in Québec (Canada). The mixture was evaluated as a potential substrate to promote methane (CH4) ...
Determination of the diffusion coefficient of oxygen for a cover system including a pulp and paper by-product
ABSTRACT: Among the several solutions that have been proposed to curb the problem posed by the generation of acid rock drainage (ARD), the placement of covers with capillary barrier effect (CCBE) has received particular ...