Elimination of methane generated from landfills by biofiltration:a review

摘要

The production of biogas in landfills,its composition and the problems resulting from its generation are all reviewed.Biofiltration is a promising option for the control of emissions to atmosphere of the methane contained in biogas issued from the smaller and/or older landfills.A detailed review of the methane biofiltration literature is presented.The microorganisms,mainly the methanotrophs,involved in the methane biodegradation process,and their needs in terms of oxygen and carbon dioxide utilization,are described.Moreover,the influence of nutrients such as copper,nitrogen and phosphorus,and the process operating conditions such as temperature,pH and moisture content of the biofilter bed,are also presented.Finally,the performance of various filter beds,in terms of their elimination capacities,is presented for laboratory scale bio-filters and landfill covers.