【摘要】 针对甲烷和恶臭物质产生潜势与垃圾填埋龄的关系,利用全自动甲烷潜能测试系统进行厌氧发酵实验,监测累积产甲烷量和速率,使用气相色谱/质谱联用仪分析恶臭物质种类和浓度.结果表明:填埋龄较短的垃圾产气量高于填埋龄较长的垃圾,填埋龄3a的垃圾产气量最大,单位质量垃圾甲烷累计产生量为29.81mL/g,填埋龄7a的垃圾产气量最小,为6.16mL/g,填埋龄3a的垃圾产甲烷速率最大,最高值达112.3mL/d;共检出40种恶臭物质,芳香族和脂肪烃种类最多、浓度最高,芳香族、卤代烃和含硫化合物浓度比例随垃圾填埋龄增加而增加;脂肪烃浓度比例随垃圾填埋龄增加而减小.更多还原

【Abstract】 In view of the relationship between the production of methane and odorous compounds with the landfill age of municipal solid waste(MSW), the anaerobic fermentation experiment was performed by using an automatic methane potential test system to monitor the cumulative methane yield and production rate, and the GC/MS was used to analyze the odorous compounds. The results showed that the yield of methane produced by the MSW with a shorter landfill age was higher. The MSW with the landfill age of 3 years had the highest gas production, with the methane cumulative yield of 29.81 mL/g, and the MSW with the landfill age of 7 years was the lowest, which was 6.16 mL/g. The MSW with landfill age of 3 years had the highest methane production rate, with the highest value of 112.3 mL/d. Aromatic compounds and aliphatic hydrocarbons dominated the 40 species of odorous compounds detected, with the most species and highest concentration. The concentration ratio of aromatic, halogenated hydrocarbon and sulfur compound increased with the landfill age; the concentration ratio of aliphatic hydrocarbon decreased as the landfill age increased.更多还原