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Overview of lean gas treatment in biogas upgrading systems

The report "Overview of lean gas treatment in biogas upgrading systems" gives a short summary on the actually established technologies for the treatment of methane content in the lean gas emanated during biogas upgrading. After a short introduction and motivation the commercially available technologies including their relevant process key parameters are shown. The methods described concern lean gas methane oxidation processes capable of providing certain amounts of heat.

First, the classical methods of combined production of electricity and heat utilising a gaseous fuel are presented. These comprise the conventional gas engine as well as micro-gasturbines commonly discussed in their application for biogas plants. Afterwards, technologies are presented that are really capable of oxidising very low calorific gases. These comprise lean gas burner, catalytic oxidation and Regenerative-thermal oxidation (in descending order regarding minimum methane content).

This document is designed as a guideline for engineers and planners during the development of new biomethane production facilities as well as to act as a short executive summary on the technology to be used by potential investors and plant operators.

This tool has been developed during the IEE-project BioMethane Regions. It is designed to be used for pre-feasibility studies regarding new bio-methane facilities. Liability claims regarding damage or economic disadvantage caused by the use of any information provided, including any kind of information which is incomplete or incorrect, will be rejected by the authors.

Current version published 07.03.2013

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