Reference : Optimisation of the Co-Digestion of Maize and Grass Silage Influence of the Substrate...

	Document type :	Scientific congresses, symposiums and conference proceedings : Paper published in a book
	Discipline(s) :	Life sciences : Environmental sciences & ecology
	To cite this reference:	http://hdl.handle.net/10993/4028

Title :	Optimisation of the Co-Digestion of Maize and Grass Silage Influence of the Substrate Mixture on the Biogas Yield
Language :	English
Author, co-author :	Benito Martin, Patricia Cristina [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
	Sibisi-Beierlein, Nonjabulo N. [> >]
	Greger, Manfred [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Publication date :	Nov-2012
Main document title :	Venice 2012 Fourth International Symposium on Energy from Biomass and Waste Proceedings
Editor :	Bilitewski, B.
	Clarke, W. P.
	Cossu, R.
	Matsuto, T.
	Nelles, M.
	Stegmann, R.
Publisher :	CISA
Peer reviewed :	Yes
On invitation :	No
Audience :	International
ISBN :	978-88-6265-006-9
City :	Padova
Country :	Italy
Event name :	4th International Symposium on Energy from Biomass and Waste
Event date :	12th - 15th November 2012
Event organizer :	IWWG - International Waste Working Group
Event place (city) :	Venice
Event country :	Italy
Keywords :	[en] Co-digestion ; Energy crops ; Biogas yield
Abstract :	[en] In recent years, energy crops have been increasingly introduced as co-substrates in biogas plants due to their high biogas yield potential. The purpose of the current research was to investigate the influence of the mixture of maize and grass silages, added as feedstock, on the specific methane production (SMP) and on the process dynamics. To this end, biological methane potential (BMP) tests were carried out in 500ml reactors with grass and maize silage in mono-digestion and 3 different co-digestion mixtures. For selected mixtures, process dynamics were further investigated in batch anaerobic experiments in 1 litre reactors by measuring different control parameters. A positive correlation was observed between the proportion of grass in the mixture and the specific methane yield due to the higher protein content (a yield up to 6% higher in comparison with mono-digestion of maize). Nevertheless, increasing amounts of grass were also related with slower degradation (lower hydrolysis rate constants) and higher instability during the first days of digestion.
Funders :	University of Luxembourg - UL
Permalink :	http://hdl.handle.net/10993/4028
	also: http://hdl.handle.net/10993/7934

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