Landfill odorous gas emission has been a serious environmental problem, especially for the residents or passersby on the road near the landfill. In this paper, in situ monitoring and the numerical CALPUFF model were adopted to analyze the odor nuisance problem caused by municipal solid waste (MSW) degradation in a large landfill. The static chamber technique was used to measure the odorous gas emission rate on the working area, temporary cover area, and final cover area of the landfill during Dec. 2016 and Apr. 2018. The results showed that the emission rate of H₂S on the working area varied from 0.003 mg/m²/min to 0.98 mg/m²/min, and it was positively correlated with the ambient temperature. The emission of H₂S varied between 0.125 kg/h and 1.09 kg/h on the working area, and it varied between 9.2  10⁻⁶ kg/h and 6.8  10⁻⁴ kg/h on the temporary cover when considering the impact of the holes in a high-density polyethylene (HDPE) membrane, and it was negligible on the final cover. The contribution rates of H₂S emission in the whole landfill were 90.79%∼98.59% and 0.0008%∼0.52% for the working area and the temporary cover area, respectively. The numerical simulation showed that wind velocity and gas emission rates were the critical factors that affect odor dispersion. To limit the H₂S-influenced area within the landfill site, proper engineering measures should be taken to ensure the H₂S emission rate of lower than 15% of its original value.

中文翻译：

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垃圾填埋场异味气体对周围环境的影响评估

垃圾填埋场产生的有毒气体一直是一个严重的环境问题，特别是对于垃圾填埋场附近道路上的居民或路人而言。本文采用现场监测和数值CALPUFF模型分析了大型垃圾填埋场中城市生活垃圾（MSW）降解引起的臭味滋扰问题。用静态室技术测量了2016年12月至2018年4月填埋场工作区，临时覆盖区和最终覆盖区的恶臭气体排放量。结果表明，H ₂ S排放量工作面积从0.003mg / m ² / min变化到0.98mg / m ² / min，并且与环境温度成正相关。H ₂的排放在工作区域上，S的变化范围为0.125 kg / h至1.09 kg / h， 考虑到高处的孔的影响，其在临时覆盖层上的变化范围为9.2   10 ^-6  kg / h至6.8   10 ^-4 kg / h。 -密度聚乙烯（HDPE）膜，在最终覆盖层上可以忽略不计。整个填埋场中，工作区和临时覆盖区的H ₂ S排放贡献率分别为90.79％〜98.59％和0.0008％〜0.52％。数值模拟表明，风速和气体排放速率是影响气味扩散的关键因素。为了限制垃圾填埋场内受H ₂ S影响的区域，应采取适当的工程措施以确保H ₂S排放率低于其原始值的15％。