Rock and Soil Mechanics ›› 2023, Vol. 44 ›› Issue (1): 259-267.doi: 10.16285/j.rsm.2022.0199

• Fundamental Theroy and Experimental Research • Previous Articles     Next Articles

Gas pressure monitoring test and prediction model of single well aeration in landfill

JIN Jia-xu1, ZHU Lei1, 2, 3, LIU Lei2, 3, 4, CHEN Yi-jun2, 5, YAO Yuan6, GAO Teng-fei1, 2, LI Ruo-xin2, 3   

  1. 1. School of Civil Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China; 2. State Key Laboratory of Geomechanics and Geotechnical Engineering, Institute of Rock and Soil Mechanics, Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 3. Hubei Province Key Laboratory of Contaminated Sludge and Soil Science and Engineering, Institute of Rock and Soil Mechanics Chinese Academy of Sciences, Wuhan, Hubei 430071, China; 4. IRSM-CAS/HK Poly. Univ. Joint Laboratory on Solid Waste Science, Wuhan, Hubei 430071, China; 5. Wuhan CAS-ITRI Solid Waste Resources Co., Ltd., Wuhan, Hubei 430070, China; 6. Wuhan Environment Investment & Development Co., Ltd., Wuhan, Hubei 430019, China
  • Received:2022-02-22 Accepted:2022-08-18 Online:2023-01-16 Published:2023-01-13
  • Supported by:
    This work was supported by the National Natural Science Foundation of China (41977254), the Youth Innovation Promotion Association CAS of Hubei Province (2021CFA096), the Foundation for Innovative Research Groups of Hubei Province (2019CFA012) and the Key Laboratory of Geotechnical and Underground Engineering of the Ministry of Education of Tongji University (KLE-TJGE-B2001).

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Abstract: Determining the characteristics of gas pressure distribution during aeration in landfills can provide key technical and theoretical support for aerobic ventilation engineering. Relying on the field single well aeration test and based on the theory of seepage mechanics, this study conducted gas pressure distribution monitoring tests under different aeration intensity conditions, analyzed the temporal and spatial distribution characteristics of the gas pressure during the aeration process, and deduced an one-dimensional steady-state analytical solution (AGPP model) of the gas pressure distribution in the garbage soil under the aeration conditions. By combining with the on-site gas pressure monitoring results, a gas pressure prediction model (EGPP model) with aeration intensity as the core parameter was constructed. The test results show that a low-pressure aeration intensity can also achieve aeration effect, and the gas is filled around the gas injection well in a short time. The reliability of the two models is preliminarily verified by comparing the field monitoring data with the AGPP model and the EGPP model. This study provides a new method for predicting and evaluating landfill gas pressure distribution during aerobic ventilation.

Key words: waste, landfill, single well aeration, gas pressure, field test, prediction model

CLC Number: 

  • TU 196.2
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