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Patent Searching and Data


Title:
METHOD FOR REDUCING METHANE SLACK WHEN STARTING AND STOPPING BIOGAS FERMENTERS AND BIOGAS SYSTEM FOR CARRYING OUT THE METHOD
Document Type and Number:
WIPO Patent Application WO/2010/063709
Kind Code:
A3
Abstract:
The invention relates to a method for reducing methane slack when operating biogas systems comprising at least one biogas fermenter and to a biogas system for carrying out the method. When starting up a freshly charged fermenter, the methane portion in the biogas produced is initially so low and the fractions of carbon dioxide and nitrogen are so high that direct use of the biogas in a combined heat and power (CHP) plant is not possible. During this startup phase of a freshly charged fermenter, the biogas generated with the low methane fraction is therefore discharged directly to the atmosphere or is flared off if the methane fraction is higher. This results in the non-use of a portion of the methane produced, methane slack. In order to prevent this, the biogas with the low methane fraction produced in the startup phase is fed to a gas treatment unit in which non-methane components of the gas mixture are partially separated and the remaining gas mixture with a higher methane fraction is returned to the biogas fermenter until the methane fraction is high enough.

Inventors:
LUTZ PETER (DE)
Application Number:
PCT/EP2009/066133
Publication Date:
October 21, 2010
Filing Date:
December 01, 2009
Export Citation:
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Assignee:
BEKON ENERGY TECHNOLOGIES GMBH (DE)
LUTZ PETER (DE)
International Classes:
C10L3/10; C12M1/107; C12P5/02
Foreign References:
DE10047264A12002-04-25
EP1634946A12006-03-15
EP1811015A12007-07-25
Attorney, Agent or Firm:
WINTER BRANDL FÜRNISS HÜBNER RÖSS KAISER POLTE - Partnerschaft (Freising, DE)
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