Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 405829
Title Co-digestion of animal manure and maize : is it sustainable, an update
Author(s) Zwart, K.B.; Kuikman, P.J.
Source Wageningen : Alterra (Alterra-report 2169) - 26
Department(s) SS - Soil Quality and Nutrients
Publication type Research report
Publication year 2011
Keyword(s) biobased economy - mestverwerking - co-vergisting - biogas - maïs - duurzame energie - broeikasgassen - emissie - manure treatment - co-fermentation - maize - sustainable energy - greenhouse gases - emission
Categories Bioenergy / Manure treatment
Abstract Co-digestion has attracted increased attention in The Netherlands as a result of a subsidy for electricity that is produced environmentally safe (MEP and SDE subsidy). Production of bio-energy by means of co-digestion turned financially profitable due to this financial support. Co-digestion is the simultaneous digestion of manure and a co-substrate and its conversion into biogas. We report on a methodology to assess the sustainability of bio-energy from co-digestion with emphasis on energy and green house gases (GHG) (Zwart et al., 2006). We have analyzed three cases, i.e. animal manure only or maize only and a mixture of 50% manure and 50% maize. On the basis of the gross ‘green gas’ and electricity production we calculated efficiencies according to the suggestions cf. Commission Cramer (Anon., 2007). We report that digestion of manure only is most efficient in reducing emissions of greenhouse gases. Digestion of maize without manure produces most energy. In terms of efficiency cf. Commission Cramer a mixture of manure and maize is most efficient. This is more efficient than digestion of maize alone as here emissions of greenhouse gases during crop production limits the efficiency cf. Commission Cramer.
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