Trace gas composition in landfill gas at Danish landfills receiving low-organic waste

Duan, Zhenhan; Kjeldsen, Peter; Scheutz, Charlotte

doi:10.1016/j.wasman.2021.01.001

Cited by 28 publications

(14 citation statements)

References 47 publications

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“…The meteorological data, including wind speed, humidity, temperature, and atmospheric pressure, during the field monitoring tests obtained from the local meteorological bureau are shown in Table 1 . It should be pointed out that extensive studies have demonstrated that the surface gas emission fluxes may exhibit prominent spatial and temporal variations as landfill gas emissions may be largely affected by waste age, cover types, components of wastes and landfill management strategies (Pierini et al 2018 ; Wang et al 2020 ; Duan et al 2021 ). The organic content, porosity and water distribution in cover soils can affect the reaction rate and migration of gases in the system.…”

Section: Applications Of the Model In A Field Studymentioning

confidence: 99%

Numerical model for static chamber measurement of multi-component landfill gas emissions and its application

Xie

Zuo

Chen

et al. 2022

Environ Sci Pollut Res

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The quantitative assessment of landfill gas emissions is essential to assess the performance of the landfill cover and gas collection system. The relative error of the measured surface emission of landfill gas may be induced by the static flux chamber technique. This study aims to quantify effects of the size of the chamber, the insertion depth, pressure differential on the relative errors by using an integrated approach of in situ tests, and numerical modeling. A field experiment study of landfill gas emission is conducted by using a static chamber at one landfill site in Xi’an, Northwest China. Additionally, a two-dimensional axisymmetric numerical model for multi-component gas transport in the soil and the static chamber is developed based on the dusty-gas model (DGM). The proposed model is validated by the field data obtained in this study and a set of experimental data in the literature. The results show that DGM model has a better capacity to predict gas transport under a wider range of permeability compared to Blanc’s method. This is due to the fact that DGM model can explain the interaction among gases (e.g., CH4, CO2, O2, and N2) and the Knudsen diffusion process while these mechanisms are not included in Blanc’s model. Increasing the size and the insertion depth of static chambers can reduce the relative error for the flux of CH4 and CO2. For example, increasing the height of chambers from 0.55 to 1.1 m can decrease relative errors of CH4 and CO2 flux by 17% and 18%, respectively. Moreover, we find that gas emission fluxes for the case with positive pressure differential (∆Pin-out) are greater than that of the case without considering pressure fluctuations. The Monte Carlo method was adopted to carry out the statistical analysis for quantifying the range of relative errors. The agreement of the measured field data and predicted results demonstrated that the proposed model has the capacity to quantify the emission of landfill gas from the landfill cover systems.

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Section: Applications Of the Model In A Field Studymentioning

confidence: 99%

Numerical model for static chamber measurement of multi-component landfill gas emissions and its application

Xie

Zuo

Chen

et al. 2022

Environ Sci Pollut Res

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“…Various household products, toxicants, pharmaceuticals and personal care products (PPCPs), batteries, and items with chemical coatings such as flame retardants are commonly discarded in landfills and are now ubiquitously present in waste . Numerous studies of the chemicals present in landfills and the associated run-off have also been linked with negative effects on the environment, wildlife, and human health including sicknesses and deaths. − Landfill leachate is the liquid effluent from the discarded liquid wastes and accumulated precipitation that infiltrates the landfill and dissolves a myriad of organic and inorganic materials. Thus, the landfill leachate composition is influenced by the material discarded and waste age. , The chemical complexity is further compounded by anaerobic fermentation in young landfills, which produces free volatile fatty acids that comprise up to 95% of the young leachate organic composition. , As the volatile fatty acids further decompose to biogas in maturing landfills, the organic composition of leachate is dominated by nonbiodegradable, refractory compounds and humic substances that can interfere with disinfection by processes such as UV disinfection .…”

Section: Introductionmentioning

confidence: 99%

Assessing the Fate of Dissolved Organic Compounds in Landfill Leachate and Wastewater Treatment Systems

et al. 2022

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Landfill leachate and municipal wastewater are major sources of chemical pollutants that contaminate our drinking water sources. Evaluating the dissolved organic chemical composition in wastewater treatment plants is therefore essential to understand how the discharge impacts the environment, wildlife, and human health. In this study, we utilized a nontargeted analysis method coupling liquid chromatography and tandem mass spectrometry (LC-MS/MS) to analyze chemical features at different points along two landfill leachate treatment plants (LLTPs) and two municipal wastewater treatment plants (WWTPs) in the Southeastern United States. Significant feature differences were observed for the WWTPs where activated sludge clarification was employed versus the LLTPs utilizing reverse osmosis. Specifically, even though both LLTPs had the largest number of features in their influent water, their effluent following reverse osmosis yielded a lower number of features than the WWTPs. Additionally, the clarification processes of each WWTP exhibited different efficiencies as chemical disinfection removed more features than UV disinfection. Feature identification was then made using the LC, MS, and MS/MS information. Analysis of the identified molecules showed that lipids were the most effectively removed from all plants, while alkaloid and organic nitrogen compounds were the most recalcitrant.

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“…The authors reported the highest absorption flux of 1.61 × 10 −3 mol m −2 at 1.2 MPa and technical benefits of pressure and liquid flow rate resulting in much higher CO 2 flux and removal efficiency. Duan et al 42 analyzed the composition of trace gas generated from shredder waste cells, mixed waste cells, and aged waste cells in Denmark, reporting the highest concentration of 10 3 mg m −3 from shredder waste cells. Also, based on the proportional relationship between CH 4 in LFG and aromatic/aliphatic hydrocarbons, the production rates of benzene, toluene, ethylbenzene, and xylenes for Odense Nord and Glatved were estimated to be 272 and 73 kg per years, demonstrating harmlessness to human health.…”

Section: Introductionmentioning

confidence: 99%

What is the best scenario to utilize landfill gas? Quantitative and qualitative approaches for technical, economic, and environmental feasibility

et al. 2022

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Trace gas composition in landfill gas at Danish landfills receiving low-organic waste

Cited by 28 publications

References 47 publications

Numerical model for static chamber measurement of multi-component landfill gas emissions and its application

Numerical model for static chamber measurement of multi-component landfill gas emissions and its application

Assessing the Fate of Dissolved Organic Compounds in Landfill Leachate and Wastewater Treatment Systems

What is the best scenario to utilize landfill gas? Quantitative and qualitative approaches for technical, economic, and environmental feasibility

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