Characterization and influence of odorous gases on the working surface of a typical landfill site: A case study in a Chinese megacity

Gao, Song; Zhao, Pandeng; Li, Yuewu; Hu, Jianing; Zhou, Shengcheng; Zhang, Huanyan; Wu, Jianping; Jiao, Zheng; Wang, Shanshan; Fu, Qingyan; Zhou, Bin

doi:10.1016/j.atmosenv.2021.118628

Cited by 14 publications

(9 citation statements)

References 35 publications

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“…Because m,p-xylene and ethylbenzene have different reactivities against OH radicals, the m,p-xylene-toethylbenzene ratio (X/E ratio) is used as an indicator of photochemical aging in an air-mass. 27,28 The diurnal variation in X/E is shown in Fig. S5.…”

Section: Resultsmentioning

confidence: 99%

Role of Garbage Classification in Air Pollution Improvement of a Municipal Solid Waste Disposal Base

Gao

et al. 2022

Preprint

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Assessing the impact of garbage classification on air pollution in rapidly developing economic regions is particularly necessary in light of the current policy trends. We evaluated the resulting changes in air pollution levels before and after garbage classification based on a three-year field observation using high-resolution online instruments in a municipal solid waste comprehensive disposal base. A new method is proposed to quantify the impact of major sources in a complex multi-source environment. We found that the concentrations of hydrogen sulfide (H2S) and volatile organic compounds (VOCs) in ambient air decreased by 48% and 43% respectively after garbage classification, and their spike frequency was controlled at approximately 0.01. The average H2S and VOC concentrations were generally low during the daytime, but relatively high during the nighttime because of meteorology and photochemistry. The ozone formation potential of the base decreased by 56%. Alternatively, emissions from transportation and combustion sources increased, while landfill pollution decreased owing to changes in the method of waste disposal. This finding suggests that garbage classification is an effective means of improving the air quality. This new quantification method has a good potential in actual research scenarios.

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Section: Resultsmentioning

confidence: 99%

Role of Garbage Classification in Air Pollution Improvement of a Municipal Solid Waste Disposal Base

Gao

et al. 2022

Preprint

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“…Para determinar la concentración y puntos de emisión de olor se realizó la evaluación en campo utilizando la norma alemana VDI 3882 [13]. que establece una escala de intensidad de olor en base a la calificación de panelistas en campo.…”

Section: A Materiales Y Métodos 1) Olfatometríaunclassified

“…Las tareas se iniciaron con pruebas en el laboratorio interno de la Planta. Se decidió utilizar cal pulverizada, y se realizaron pruebas con ratios Peso cal/Peso materia seca del lodo (p/p), en un ratio de 20%, 25%, 28%, 31% y 34% p/p 1…”

Section: A Materiales Y Métodos 1) Olfatometríaunclassified

“…Las emisiones y contaminantes de olor en una zona de tratamiento de secado de lodos de depuradora y de un monorrelleno de lodos, pueden tener impacto en el medio ambiente circundante y en los residentes cercanos [1], y pueden generar oposición pública en desmedro de la reputación de una instalación de tratamiento de aguas residuales [2].…”

Section: Introductionunclassified

“…El control de estabilización de lodo está definido como el porcentaje de reducción de los sólidos volátiles, respecto a lo s sólidos totales, en un intervalo de 40 a 50% [12], la referencia nacional nos da la pauta para determinar cómo lodo residual estabilizado, a aquel cuya porción de sólidos volátiles es igual o menor del 60% de los sólidos totales [13].…”

Section: Introductionunclassified

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Reduction of Odor Emission by Alkaline Treatment for Stabilization of Undigested Sludge from Wasterwater in Arequipa - Peru

Ortiz¹,

Monje²,

Sánchez³

et al. 2022

Proceedings of the 20th LACCEI International Multi-Conference for Engineering, Education and Technology: “Education, Research A

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Odor emissions in wastewater treatment facilities are one of the most relevant issues to address to protect the image and acc eptance of the plant in areas that may cause annoyance to passers-by or nearby neighborhoods. The waste from the treatment process consists of sludge, which is generally treated in the plant through stabilization procedures with anaerobic, aerobic, thermal drying, or other systems. If the sludge is not digested (stabilized), the emanation of odors can become extremely high and aggressive for the neighborhood and workers of the Plant. In this study, the solution is proposed to control the odors emanating from undigested sludge that is transported to an external facility to the wastewater treatment plant for drying in the sun for about 30 days by permanent turning with machinery to reduce their humidity from 82% to 40%. T hen, the dried sludge is disposed of in a monofil as final disposal. Being an undigested sludge, in its drying process, gas emissions with annoying odors were generated for workers and drivers of vehicles that travel along the road surrounding the area. To determine odor levels, both at emission p oints and receptors in areas surrounding the facility, before, during, and after the investigation, dynamic olfactometry tasks have been carried out using the European standard UNE-EN 13725 for odor dispersion measurement and modeling protocols. With this information, the odor intensities were det ermined under the scale of the VDI 3882 standard. This study proposes an alkaline treatment of the sludge with the addition of quicklime (C aO) useful at 85% for the stabilization of the undigested sludge and reduction in odor generation. Lime dosage tests were carried out in the laboratory and the appropriate dosage for odor control was determined. Large-scale pilot tests were performed out on the drying platform, controlling the pH levels in the treated sludge remaining above 12 for up to 72 hours to inhib it the emission of gases from microbial activity. The dosage of lime at the beginning of the drying process gave the expected result, generating a stabilization of the sludge and reducing the period of solar drying, which drastically reduced the emission of odoriferous gases. The odor control objective was endorsed by the reduction in odor perception from level 5 (very strong) to level 2 (weak), inside and outside the facility. The gas microsensors registered a considerable difference between th e concentration of gases in the sludge treatment platform, the monofil, and the surrounding areas, being much smaller and less noticeable for internal and external users of the plant.

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Annual fluctuation of gas concentration within the landfill surface layer in a tropical climate: A case study of a municipal wasteyard

Herath,

Buddhima,

Gunathilake

et al. 2023

Environmental Quality Mgmt

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This study looks at the annual variations in landfill gas concentrations within the surface layer of the dump as well as the effect of climatic factors on these variations under the tropical climate. The experiment was carried out at part of the Karadiyana landfill, Sri Lanka, containing old mixed municipal solid waste covered by vegetation. The gas concentrations of the landfill surface layer were measured from three gas wells established on the dump surface layer, which contains 2.5 m depth, throughout the year with the measuring of climatic factors. The results show the annual fluctuation of temperature, cumulative rainfall, relative humidity, and atmospheric pressure were 27–42°C, 66.7–357.7 mm, 24.7%–78.2%, and 999.5–1014 mbar around the studied landfill area, and the average concentration value of the CH4, NH3, H2S, and VOCs gases were 18.94 ± 11.49%, 15.48 ± 15.17 mg m−3, 15.06 ± 19.02 mg m−3, and 0.83 ± 0.99 mg m−3, respectively. The rainfall and atmospheric temperature were significant metrological factors influencing the surface layer gas concentrations and showed a significant positive correlation with cumulative rainfall and a negative correlation with atmospheric temperature. The relative humidity shows a moderate positive correlation, and there was no evidence of a considerable impact of atmospheric pressure on the surface layer concentrations. Annual fluctuation is a critical factor for landfill gas emission quantification, and surface layer concentration variation can be used to study the emission fluctuation by considering their relationship.

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Characterization and influence of odorous gases on the working surface of a typical landfill site: A case study in a Chinese megacity

Cited by 14 publications

References 35 publications

Role of Garbage Classification in Air Pollution Improvement of a Municipal Solid Waste Disposal Base

Role of Garbage Classification in Air Pollution Improvement of a Municipal Solid Waste Disposal Base

Reduction of Odor Emission by Alkaline Treatment for Stabilization of Undigested Sludge from Wasterwater in Arequipa - Peru

Annual fluctuation of gas concentration within the landfill surface layer in a tropical climate: A case study of a municipal wasteyard

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