Method and device for operating a fermentation plant
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United States of America Patent
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Jan 12, 2016
Grant Date -
May 17, 2012
app pub date -
Nov 17, 2010
filing date -
Nov 17, 2010
priority date (Note) -
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Abstract
A method for operating a fermentation plant with at least one digester (1) that is supplied with a substrate (1a). The substrate (1a) is percolated using a percolate (2a) from a percolate container (2) and biogas that is generated via the percolation process in the digester (1) or/and in the percolate container (2) is drawn off. The drawn off biogas is treated in a biogas treatment device (3) and the CO2-containing exhaust gas that is generated during the treatment is introduced into the digester (1) using a purge line (4), for forcing out and drawing off the biogas that was generated in the digester (1). Alternatively CO2-containing biogas that was generated in an additional digester (1) in a different fermentation process can be introduced into the digester (1) using a purge line (4) for forcing out and drawing off the biogas that was generated in the digester (1). The CO2-containing purge gas is supplied to the digester (1) such that the CO2-containing purge gas is forced to pass through the substrate (1a) dislodging any trapped biogas.
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