Assessment of Landfill Gas (Lfg) Energy Potential Based on Estimates of LFG Models

Abstract

Methane emission from landfilling of waste is one of the most prevalent gas contributing to the greenhouse effect. Current waste management strategies, aim to reduce methane emissions from landfills, promote energy recovery from landfill gas (LFG) that is recognized as a renewable energy resource, due to its higher calorific value. First and the most crucial stage in the planning and design of LFG collection and energy recovery systems is to quantify LFG generation. It's because, the quantity of LFG and its methane content determine both the applicable method for the control and use of LFG and the feasibility of energy recovery. LFG models are developed for the projection of LFG generation over time from a mass of landfilled waste. During planning and projection phase of a landfill, the amount of gas that will be generated and recovered at the site can be estimated -based on projected amounts of waste -by only using these models. Due to complex nature of LFG formation, several models have been developed to model and estimate LFG generation with different approaches for regions in different climates. In a LFG energy recovery project, selection of the appropriate modeling approach and its model parameters for the estimation of LFG generation is the most crucial step. With considering this requirement, this study aims to estimate the amount of LFG and its technical energy potential from the case study landfill site (i.e. Harmandalı Landfill Site in İzmir Metropolitan City). According to the computations carried out by Multi-phase model, it was determined that the remaining amount of LFG at the site was nearly 50% of total energy potential. Besides, maximum energy potential from LFG generated at the site was estimated as 9.6 MW. This study indicates that LFG models can be utilized as effective tools in energy recovery projects. Keywords

Estimation of Methane Generation and Energy Potential of Nigde Landfill Site Using First Order Mathematical Modelling Approaches

“…It is important to note that there will be a methane potential between 31% to 60% after depositing municipal wastes. A study for İzmir Landfill site was concluded remaining methane potential as 74 % after closure of the site (Sarptaş, 2016). Figure 4.…”

“…The electricity generation results were estimated based on Multiphase Model with the parameters estimated from CRA method. The gas collection efficiency was suggested 75% (Sarptaş, 2016). The maximum electricity generation was in 2042 with an annual production of 6.9 million kWh.…”

“…The maximum electricity generation was in 2042 with an annual production of 6.9 million kWh. According to the estimations done by Sarptaş, (2016) The maximum energy generation for İzmir Harmandalı Landfill Site was estimated 223 million kWh. It was suggested that the energy production will continue for 30 years Uisung et al, (2017) and Figure 6 shows the annual energy generation for the years between 2042-2072.…”

Türkiye’nin endüstriyel elektrik tüketimine yönelik depolama gazı enerji potansiyeli

“…Çöp gazından elde edilebilecek elektriğin 2045 yılında 28.673 MWh olacağı tahmininde bulunmuştur. Sarptaş [16] tarafından yapılan çalışmada, İzmir Harmandalı düzenli depolama alanında üretilecek depo gazı miktarının ve bu gaz miktarını dikkate alarak LandGEM ve farklı modeller kullanılmak suretiyle enerji potansiyelini belirlemişlerdir. Maksimum enerji potansiyelinin 9,6 MW olduğu tahmin edilmiştir.…”

Landfill reactions to society actions: The case of local and global air pollutants of Cerro Patacón in Panama

“…These irregularities affect the local and global environment throughout the landfill's active life, and eventually derive in societal impacts (OECD, 2008). Indeed, landfills are the final stage of the waste management system where uncontrolled waste disposal, combined with local weather conditions-temperature and humidity-and inappropriate management, creates environmental pressures (Sarptaş, 2016). The shifting of landfill costs to the environment is the central concern of the opposition to landfill sites, since such environmental pressures are the chronicle of foretold societal impact.…”