The behaviour of carbon dioxide (CO₂) and methane (CH₄) emissions at the surface and below the soil cover in an industrial waste landfill under anaerobic operating conditions was evaluated for six years. This landfill contained gypsum board waste and incineration ash – a practice currently allowed because of a change in Japanese regulations. The CO₂ and CH₄ fluxes decreased throughout the six years of the survey. Almost all of the survey points exhibited fractions of CH₄ in landfill gas emissions of <0.5 (mean values: 0.0–0.1 [surface], 0.0–0.3 [subsurface]) under anaerobic conditions. In addition, a relatively high first-order reaction rate constant for the landfill gas emissions (0.3 year⁻¹) was observed. The landfill leachate showed a relatively high sulphate ion (SO₄ ^2–) concentration, although other environmental conditions, such as the pH, oxidation–reduction potential and ammonium concentration, were not at levels that could have inhibited CH₄ production. These findings suggest that the low fractions could have been related to the lower amounts of CH₄ generation caused by competition between methanogens and sulphate-reducing bacteria (SRB). Therefore, SRB could play a major role in the degradation of organic carbon in the landfill.

在厌氧条件下，对工业垃圾填埋场表面和土壤覆盖下的二氧化碳（CO ₂）和甲烷（CH ₄）排放行为进行了六年评估。该垃圾填埋场包含石膏板废物和焚烧灰渣-由于日本法规的变更，目前允许这种做法。在整个调查的六年中，CO ₂和CH _4的通量下降了。在厌氧条件下，几乎所有调查点的垃圾填埋气体排放量中的CH ₄分数均小于0.5（平均值：0.0-0.1 [表面]，0.0-0.3 [地下]）。此外，垃圾填埋气排放的一阶反应速率常数相对较高（0.3年^-1） 被观测到。垃圾填埋场渗滤液显示出较高的硫酸根离子（SO ₄ ^2–）浓度，尽管其他环境条件（例如pH值，氧化还原电位和铵浓度）未达到可能抑制CH ₄产生的水平。这些发现表明，低分数可能与产甲烷菌和硫酸盐还原细菌（SRB）之间竞争引起的CH ₄生成量降低有关。因此，SRB可能在垃圾填埋场中有机碳的降解中起主要作用。