Composition and Correlative Concentration Analysis of Odorous Compounds Emitted from the Working Surface at a Landfill in Beijing

摘要

The estimation of odorous compounds production from landfill sites is a very complicated task because of the various chemical and biological species that exist in landfill gas. In this study, the correlative concentration between ethanol and other odorous compounds emitted from the working surface at a landfill in Beijing was analyzed. Gas sampling was conducted at the landfill on several selected days from March 2012 to March 2014, representing the different periods throughout the two years. A total of 41, 59, 66, 54, 63, 54, 41, 42 species of trace compounds were identified and quantified during eight sampling activities, respectively, and a total of 86 species of trace compounds were identified and quantified all together. The measured trace compounds were classified into six different categories (Oxygenated compounds, Halogenated compounds, Terpenes, Sulfur compounds, Aromatics and Hydrocarbons). The total average concentrations of the oxygenated compounds, sulfur compounds, aromatics, halogenated compounds, hydrocarbons and terpenes were 2.450 mg/m~3, 0.246 mg/m~3, 0.203 mg/m~3, 0.319 mg/m~3, 0.530 mg/m~3, 0.217 mg/m~3, respectively. The correlative concentrations of the odorous compounds with respect to the concentration of ethyl alcohol (ethyl alcohol taken 1000 ppm total) were determinate, which could make great significance to the estimation of odorous compounds emitted from the landfill sites.