Reference : 2-stage process for a higher flexibility of biogas-plants

	Document type :	Scientific congresses, symposiums and conference proceedings : Unpublished conference
	Discipline(s) :	Engineering, computing & technology : Energy
	Focus Areas :	Sustainable Development
	To cite this reference:	http://hdl.handle.net/10993/28520

Title :	2-stage process for a higher flexibility of biogas-plants
Language :	English
Author, co-author :	Greger, Manfred [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Benito-Martins, Patricia []
	Schlienz, Markus [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Publication date :	21-Sep-2016
Peer reviewed :	No
Audience :	International
Event name :	Environmental Best Practices - 5th international Conference in Offenburg
Event date :	from 20-092016 to 22-09-2016
Event organizer :	University of Offenburg
Event place (city) :	Offenburg
Event country :	Germany
Keywords :	[en] biogas ; 2-stage process ; flexible production
Abstract :	[en] The increasing part of renewable energy in the electricity production mix with its known fluctuations of wind and photovoltaic plants is leading to an enlarged discrepancy of production and consumption. Up to now the electricity production of biogas plants is more or less constant but could be used in future more to balance the energy production by using higher biogas storage capacity. An interesting alternative could be a 2 stage process. The 1st stage is operated at higher loadings and low pH where mainly substrate hydrolysis takes place and relatively small quantities of H2/CO2 gas are produced. The effluent shows high concentrations (total > 10 g FA/l) of mainly butyric and caproic acid which could easily and stable be temporarily stored in liquid-tanks. The transformation of the acidic intermediates from hydrolysis to biogas (and finally electricity) in the 2nd stage is faster compared to the traditional fermentation. The storage capacity for the acidic intermediates is more than 10 times smaller compared to the temporary storage of biogas.
Funders :	University of Luxemburg
Name of the research project :	flexibilisation of biogas-plants
Target :	Researchers ; Professionals ; Students
Permalink :	http://hdl.handle.net/10993/28520

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