April 4, 2022

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Girish Kumar Coauthored Reliability Assessment of Bioreactor Landfill Performance Using Coupled Thermo-Hydro-Bio-Mechanical Model for Journal of Geotechnical and Geoenvironmental Engineering

Girish Kumar, Ph.D., S.M.ASCE (California) coauthored an article entitled "Reliability Assessment of Bioreactor Landfill Performance Using Coupled Thermo-Hydro-Bio-Mechanical Model" for publication in the Journal of Geotechnical and Geoenvironmental Engineering on February 28, 2022.

Girish's coauthor was Krishna Reddy, University of Illinois.

Girish Kumar is a Senior Staff Professional based in California with a focus on site assessment and remediation consulting. He has academic and research experience in geotechnical and geoenvironmental engineering, including landfill design and analysis, environmental remediation, numerical modeling and analysis of geosystems, and life cycle assessment and sustainability quantification. Girish has published more than 40 research articles, and his work has been recognized by several professional organizations, including the American Society of Civil Engineers (ASCE), Environmental Research and Education Foundation (EREF), Solid Waste Association of North America (SWANA), and Air & Waste Management Association (A&WMA).

The Journal of Geotechnical and Geoenvironmental Engineering covers the broad area of practice known as geotechnical engineering. Papers are welcomed on topics such as foundations, retaining structures, soil dynamics, engineering behavior of soil and rock, site characterization, slope stability, dams, rock engineering, earthquake engineering, environmental geotechnics, geosynthetics, computer modeling, groundwater monitoring and restoration, and coastal and geotechnical ocean engineering. Authors are also encouraged to submit papers on new and emerging topics within the general discipline of geotechnical engineering. Theoretical papers are welcomed, but there should be a clear and significant potential for practical application of the theory. Practice-oriented papers and case studies are particularly welcomed and encouraged.

Abstract

This study presents a reliability-based analysis performed using a coupled thermo-hydro-bio-mechanical model to assess the long-term performance of a typical landfill cell geometry under simulated bioreactor landfill conditions. Several Monte-Carlo simulations were carried out by considering randomly generated lognormally distributed fields of different properties of waste to represent the waste heterogeneity. The long-term performance of the simulated bioreactor landfill cell was evaluated in terms of wetted area (WA), cumulative methane (CH4) gas generated (WCH4), maximum surface settlement (SSmax), and maximum temperature of the waste (Tmax), at different intervals of time during the operation of the simulated bioreactor landfill cell. A deterministic analysis was also conducted using the mean values for the different properties of waste. The results show that the deterministic analysis overpredicts the maximum value for WA, WCH4, SSmax, and Tmax obtained from the stochastic analysis by approximately 10%, 17%, 25%, and 14%, respectively. The most likely values estimated for the four performance metrics from the stochastic analysis were approximately 44%, 88,000 m3, 5.5 m, and 62.5°C, respectively. It was also determined that the waste's anisotropy with regard to its hydraulic conductivity and the biodegradation-induced void change parameter had the most influence on WA and the SSmax in the landfill cell, respectively.

More Information

About the article: Reliability Assessment of Bioreactor Landfill Performance Using Coupled Thermo-Hydro-Bio-Mechanical Model
About Journal of Geotechnical and Geoenvironmental Engineering: https://ascelibrary.org/journal/jggefk
For consultation regarding bioreactor landfill performance, contact Girish Kumar at This email address is being protected from spambots. You need JavaScript enabled to view it.
Learn more about Girish: Girish Kumar | LinkedIn