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污染控制技术原理与工艺

摘要：利用和强化填埋场终场覆盖层土壤的甲烷氧化能力是控制填埋场温室气体排放的一种经济和有效的手段.以杭州天子岭填埋场终场覆土为研究对象,采用柱实验方法对填埋场终场覆盖层的甲烷氧化行为进行模拟研究.实验结果表明,模拟柱整体甲烷氧化速率由实验初始的3.33 mol·m^-2·d^-1增至8.33mol·m^-2·d^-1,表征了甲烷氧化菌群的生长与增殖;覆土层氧气的空间分布与其中的甲烷氧化活动有显著的交互影响,甲烷氧化活动在10～20 cm深度最为强烈;整个实验过程中,甲烷氧化后转化为二氧化碳的比例为51%,其余的碳被微生物所固定.

Abstract：Methane is one of the most important greenhouse gases, and methane emission from landfill takes a great part of total amount of released methane on the earth. To control methane emission from landfill site, one efficient and economical method is to use and enhance the methane oxidation capacity of landfill cover soil. In this paper, the methane oxidation behavior of the landfill cover soil is studied in a simulating column using the cover soil from the Tianziling landfill site of Hangzhou. The results show that the methane oxidation capacity of the cover soil in the column increased from 3.33 mol·m^-2·d^-1 to 8.33 mol·m^-2·d^-1 during the experimental period, which indicates the multiplication of methanotrophic bacteria; the activity of methanotrophic community has a significant influence on O₂ profile,the most intensive methane oxidation occurs in the layer 10～20 cm; the transformation ratio from CH₄ to CO₂ is 51% during this experiment, and the left carbon source in CH₄ is probably assimilated by microorganisms.