In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy
Field monitoring of methane emissions from landfills is of great importance for both environmental concern and economic benefit. This study presents a highly effective method to measure methane emissions from landfills based on tunable diode laser absorption spectroscopy (TDLAS). Methane concentrati...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/5/2117 |
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| author | Haijie He Shiyi Gao Jie Hu Tie Zhang Tao Wu Zhanhong Qiu Chensheng Zhang Yaoran Sun Sailing He |
| author_facet | Haijie He Shiyi Gao Jie Hu Tie Zhang Tao Wu Zhanhong Qiu Chensheng Zhang Yaoran Sun Sailing He |
| author_sort | Haijie He |
| collection | DOAJ |
| description | Field monitoring of methane emissions from landfills is of great importance for both environmental concern and economic benefit. This study presents a highly effective method to measure methane emissions from landfills based on tunable diode laser absorption spectroscopy (TDLAS). Methane concentration is obtained by analyzing the absorption spectrum of the laser after passing through the landfill gas. The relationship between methane concentration and the optical signal was calibrated in the laboratory. As the methane concentration increased from 400 ppm to 5000 ppm, the absorption spectrum amplitude increased linearly from 0.0005 to 0.0046. In situ testing of methane emissions at a large-scale landfill in China demonstrated the accuracy of the TDLAS method. The methane concentrations in the well-covered areas were generally below 100 ppm. In the working area or the coverage area with holes, the methane concentration was about 700 ppm. The methane concentration was up to 1900 ppm, where the gas collection pipe is disconnected. Due to to the accuracy and simplicity, the TDLAS method is suitable to detect methane emissions on a large-scale from landfills. |
| first_indexed | 2024-03-09T06:17:38Z |
| format | Article |
| id | doaj.art-441e0628313047bca3771724072b9f31 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T06:17:38Z |
| publishDate | 2021-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-441e0628313047bca3771724072b9f312023-12-03T11:50:45ZengMDPI AGApplied Sciences2076-34172021-02-01115211710.3390/app11052117In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption SpectroscopyHaijie He0Shiyi Gao1Jie Hu2Tie Zhang3Tao Wu4Zhanhong Qiu5Chensheng Zhang6Yaoran Sun7Sailing He8College of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, ChinaCentre for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang University, Hangzhou 310000, ChinaCollege of Civil and Architectural Engineering, Zhejiang University, Hangzhou 310000, ChinaCentre for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang University, Hangzhou 310000, ChinaCollege of civil engineering and architecture, Jiangsu University of Science and Technology, Zhenjiang 212000, ChinaCollege of Civil and Architectural Engineering, Taizhou University, Taizhou 318000, ChinaCollege of Civil and Architectural Engineering, Zhejiang University, Hangzhou 310000, ChinaCentre for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang University, Hangzhou 310000, ChinaCentre for Optical and Electromagnetic Research, National Engineering Research Center for Optical Instruments, Zhejiang University, Hangzhou 310000, ChinaField monitoring of methane emissions from landfills is of great importance for both environmental concern and economic benefit. This study presents a highly effective method to measure methane emissions from landfills based on tunable diode laser absorption spectroscopy (TDLAS). Methane concentration is obtained by analyzing the absorption spectrum of the laser after passing through the landfill gas. The relationship between methane concentration and the optical signal was calibrated in the laboratory. As the methane concentration increased from 400 ppm to 5000 ppm, the absorption spectrum amplitude increased linearly from 0.0005 to 0.0046. In situ testing of methane emissions at a large-scale landfill in China demonstrated the accuracy of the TDLAS method. The methane concentrations in the well-covered areas were generally below 100 ppm. In the working area or the coverage area with holes, the methane concentration was about 700 ppm. The methane concentration was up to 1900 ppm, where the gas collection pipe is disconnected. Due to to the accuracy and simplicity, the TDLAS method is suitable to detect methane emissions on a large-scale from landfills.https://www.mdpi.com/2076-3417/11/5/2117methane emissionslandfill gaslaser absorption spectroscopycover systemfield monitoring |
| spellingShingle | Haijie He Shiyi Gao Jie Hu Tie Zhang Tao Wu Zhanhong Qiu Chensheng Zhang Yaoran Sun Sailing He In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy Applied Sciences methane emissions landfill gas laser absorption spectroscopy cover system field monitoring |
| title | In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy |
| title_full | In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy |
| title_fullStr | In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy |
| title_full_unstemmed | In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy |
| title_short | In-Situ Testing of Methane Emissions from Landfills Using Laser Absorption Spectroscopy |
| title_sort | in situ testing of methane emissions from landfills using laser absorption spectroscopy |
| topic | methane emissions landfill gas laser absorption spectroscopy cover system field monitoring |
| url | https://www.mdpi.com/2076-3417/11/5/2117 |
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