Parameswaran, T G and Sivakumar Babu, GL (2022) Design of gas collection systems: Issues and challenges. In: Waste Management and Research .
Full text not available from this repository. (Request a copy)Abstract
The design of a gas collection system (GCS) for a landfill involves estimating several critical parameters, such as the radius of influence (ROI), suction pressures, number of wells and their spacing. One of the biggest challenges lies in the estimation of ROI for a particular landfill. In this study, the ROI for a Bagalur landfill is estimated for various possible gas generation rates. ROI for active and passive GCS is estimated with numerical modelling (two-dimensional) for all definitions of ROI at different suction pressures. An inverse correlation was observed between the values of various definitions of ROI at different gas generation rates. Justification for this behaviour is brought out by addressing the conceptual difference between these definitions. The number of wells along with their spacing was then calculated, and the efficiency of the design was assessed with three-dimensional modelling. Passive and active systems had average methane recovery rates of 84 and 88, respectively, with an atmospheric methane flux ranging from 10�9 to 10�10 kg m�2 s�1. The high recovery rate and low methane flux indicate the effectiveness of the design. The values of the methane flow rate from the extraction well were validated with a theoretical method, suggesting the usability of the model for future investigations. © The Author(s) 2022.
| Item Type: | Journal Article |
|---|---|
| Publication: | Waste Management and Research |
| Publisher: | SAGE Publications Ltd |
| Additional Information: | The copyright for this article belongs to SAGE Publications Ltd |
| Keywords: | Atmospheric chemistry; Biogas; Gas generators; Gases; Inverse problems; Methane; Recovery, Atmospheric methane flux; Atmospheric methanes; Bagalur landfill; Gas collection systems; Gas recovery; Gas recovery rate; Methane fluxes; Radius of influences; Recovery rate; Suction pressures, Land fill |
| Department/Centre: | Division of Mechanical Sciences > Civil Engineering |
| Date Deposited: | 23 May 2022 05:56 |
| Last Modified: | 23 May 2022 05:56 |
| URI: | https://eprints.iisc.ac.in/id/eprint/71821 |
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