Climate impact of an optimised gas treatment on old landfills

Author:

Berger Roland1,Lehner Joachim2

Affiliation:

1. e-flox GmbH, Renningen, Germany

2. Contec Ingenieurgesellschaft für Energie und Umwelttechnik mbH, Herrenberg, Germany

Abstract

It is a well-established fact that the quality and quantity of landfill gas (LFG) start declining after a landfill is closed to further waste intake. Conventional gas treatment and utilisation systems such as flares and gas-driven engines require a certain quality of LFG: specifically, a sufficient methane concentration. Various measures are utilised to maintain the necessary quality of LFG, including a turn-down of gas extraction rates and a shutdown of low-quality gas wells, resulting in a decline of LFG production. This, however, does not have to be the case. The low calorific value (LCV) LFG capture and treatment technology developed by e-flox and referred to in this article as ‘LCV LFG System’ can significantly increase the collection rate and the amount of treated methane in an old landfill. This article introduces such new treatment measures, describes gas capture calculation methodologies and presents actual results based on a medium-sized landfill in Germany. The study demonstrates, among other things, that the LCV LFG system can reduce the CO2 avoidance costs to roughly 10 €/tCO2eq. We present this new technology as a quick and straightforward measure of dealing with the climate issues related to methane emissions of old landfills.

Publisher

SAGE Publications

Subject

Pollution,Environmental Engineering

Reference12 articles.

1. Berger R, Lehner J (2015) Schwachgasverwertung mit FLOX-Brenner am Beispiel der Deponie Ramsklinge (Esslingen). Deponietechnik. Available at: https://www.irb.fraunhofer.de/dokumentlieferdienst/?id_z=2015079013891

2. FEE Kurzbericht (2005) CO2 Vermeidungskosen erneuerbarer Energie-technologien. Available at: https://www.ffe.de/veroeffentlichungen/co%e2%82%82-vermeidungskosten-erneuerbarer-energietechnologien/

3. The Cost of Reducing Greenhouse Gas Emissions

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