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Enhancement of biogas production from food waste and sewage sludge: environmental and economic life cycle performance
University of Gävle, Faculty of Engineering and Sustainable Development, Department of Building, Energy and Environmental Engineering, Environmental engineering. Profu AB, Mölndal, Sweden.ORCID iD: 0000-0002-5661-2917
Profu AB, Mölndal, Sweden.
Profu AB, Mölndal, Sweden.
Profu AB, Mölndal, Sweden.
2016 (English)In: Journal of Environmental Management, ISSN 0301-4797, E-ISSN 1095-8630, Vol. 175, 33-39 p.Article in journal (Refereed) PublishedText
Abstract [en]

Management of municipal solid waste is an efficient method to increase resource efficiency, as well as to replace fossil fuels with renewable energy sources due to that (1) waste to a large extent is renewable as it consists of food waste, paper, wood etc. and (2) when energy and materials are recovered from waste treatment, fossil fuels can be substituted. In this paper results from a comprehensive system study of future biological treatment of readily degradable waste in two Swedish regions are presented. Different collection and separation systems for food waste in households have been applied as well as technical improvements of the biogas process as to reduce environmental impact. The results show that central sorting of a mixed fraction into recyclables, combustibles, biowaste and inert is a competitive option compared to source separation. Use of pellets is beneficial compared to direct spreading as fertiliser. Fuel pellets seem to be the most favourable option, which to a large extent depends on the circumstances in the energy system. Separation and utilisation of nitrogen in the wet part of the digestion residue is made possible with a number of technologies which decreases environmental impact drastically, however to a substantial cost in some cases.

Place, publisher, year, edition, pages
2016. Vol. 175, 33-39 p.
Keyword [en]
LCA, ORWARE, Biogas, Costs, GHG, Food waste, Sludge
National Category
Energy Engineering Bioenergy
URN: urn:nbn:se:hig:diva-21411DOI: 10.1016/j.jenvman.2016.03.022ISI: 000375501800004PubMedID: 27038432ScopusID: 2-s2.0-84962264608OAI: oai:DiVA.org:hig-21411DiVA: diva2:920279
Available from: 2016-04-18 Created: 2016-04-18 Last updated: 2017-01-09Bibliographically approved

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