The increase in solid waste generation has been a major contributor to the amount of Greenhouse gases (GHGs) present in the atmosphere. To some extent, a great chunk of these GHGs in the atmosphere is from landfill. This study assesses two theoretical models (LandGEM and Afvalzorg models) to estimate the amount of landfill gas (LFG) emitted from Thohoyandou landfill site. Also, the LFGcost Web model was used to estimate the cost and benefits of the implementation of an LFG utilization technology. The Thohoyandou landfill started operations in the year 2005 and it is proposed to reach its peak at approximately in the year 2026. The LandGEM calculates the mass of landfill gas emission using methane generation capacity, mass of deposited waste, methane generation constant and methane generation rate. Meanwhile, the Afvalzorg model determines the LFG emissions using the Methane correction factor, yearly waste mass disposal, waste composition, Degradation Organic Carbon, methane generation rate constant, LFG recovery efficiency. The study findings indicate that the methane (CH₄) and carbon dioxide (CO₂) emitted from the landfill estimated from LandGEM will peak in the year 2026 with values of 3517 Mg/year and 9649 Mg/year, respectively. Results from the Afvalzorg model show that CH₄ emission will peak in the year 2026 (3336 Mg/year). The LandGEM model showed that the total LFG, CH₄ and CO₂ emitted from the landfill between 2005 and 2040 are 293239.3 Mg/year, 78325.7 Mg/year and 214908.6 Mg/year, respectively. The simulation from the Afvalzorg model found that the CH₄ emitted from the years 2005– 2040 is 74302 Mg/year. The implementation of an LFG utilization technology was economically feasible from consideration of the sales of electricity generated and Certified Emission Reductions (CER) (carbon credits).

Implications

The methane (CH₄) and carbon dioxide (CO₂) emitted from the Thohoyandou landfill estimated from LandGEM will peak in the year 2026 at 3517 Mg/year and 9649 Mg/year, respectively. The Afvalzorg model shows that CH₄ emission will peak in the year 2026 (3336 Mg/year). The LandGEM model showed that total LFG, CH₄ and CO₂ emitted from the landfill between 2005 and 2040 (Mg/year) are 293,239, 78,325 and 214,908, respectively. The simulation from the Afvalzorg model found that CH₄ emitted from years 2005– 2040 is 74,302 Mg/year. Therefore, implementation of LFG utilization is economically feasible from sales of electricity generated and Certified Emission Reductions.

中文翻译：

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对南非Thohoyandou垃圾填埋场的垃圾填埋气潜力和潜在能量回收进行建模。

固体废物产生的增加是大气中存在的温室气体（GHG）数量的主要贡献者。在某种程度上，大气中这些温室气体的很大一部分来自垃圾填埋场。这项研究评估了两个理论模型（LandGEM和Afvalzorg模型），以估算Thohoyandou垃圾填埋场排放的垃圾填埋气（LFG）量。此外，LFGcost Web模型还用于估计实施LFG利用技术的成本和收益。Thohoyandou垃圾填埋场于2005年开始运营，预计将在2026年达到顶峰。LandGEM使用甲烷产生能力，沉积废物质量，甲烷产生常数和甲烷产生率来计算垃圾填埋气体的排放量。 。与此同时，Afvalzorg模型使用甲烷校正因子，年度废物处理量，废物成分，降解有机碳，甲烷产生速率常数，LFG回收效率来确定LFG排放。研究结果表明，甲烷（CH₄）和LandGEM估算的垃圾填埋场排放的二氧化碳（CO ₂）将在2026年达到峰值，分别为3517 Mg /年和9649 Mg /年。Afvalzorg模型的结果表明，CH ₄排放量将在2026年达到峰值（3336 Mg /年）。LandGEM模型显示，从2005年到2040年，垃圾填埋场排放的LFG，CH ₄和CO ₂总量分别为293239.3 Mg /年，78325.7 Mg /年和214908.6 Mg /年。通过Afvalzorg模型进行的仿真发现，CH ₄从2005年至2040年的排放量为74302 Mg /年。考虑到发电量的销售和核证的减排量（CER）（碳信用额），实施LFG利用技术在经济上是可行的。

含义

LandGEM估计，Thohoyandou垃圾填埋场排放的甲烷（CH ₄）和二氧化碳（CO ₂）将于2026年达到峰值，分别为3517 Mg /年和9649 Mg /年。Afvalzorg模型显示，CH ₄排放量将在2026年达到峰值（3336 Mg /年）。LandGEM模型显示，2005年至2040年（镁/年）从垃圾填埋场排放的总LFG，CH ₄和CO ₂分别为293,239、78,325和214,908。Afvalzorg模型的模拟发现，2005年至2040年排放的CH ₄为74,302 Mg /年。因此，从发电量的销售和核证的减排量来看，实施LFG利用在经济上是可行的。