Utilization of cast seaweed and waste from pectin production for anaerobic digestion

Anders Michael Fredenslund, Thomas Budde Christensen, Tyge Kjær, Steen Danielsen, Henrik Bjarne Møller, Lotte Lodberg Kjær, Klaus Fafner

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


The paper describes a preliminary study on the environmental consequences of realizing a biogas plant using locally available biomass fractions in Solrød, Denmark. The biomass, which will be used at the plant, will consist of: cast seaweed (app. 20,000 tons year-1), waste from pectin production (app. 80,000 tons year-1) and manure (app. 50,000 tons year-1) and other materials in lesser amounts. Methane potentials of the two “new” biomass fractions were measured to predict their contribution to the biogas production. Measured methane potentials were: Pectin waste: 370 to 460 ml CH4 g VS-1 and cast seaweed (winter sample): 118 ml CH4 g VS-1. The predicted annual biogas production of the plant was 5.4 million m3 CH4. An environmental assessment concluded that a biogas plant using the aforementioned organic materials will reduce greenhouse gas emissions between 25,000 tons CO2 year-1 and 40,000 tons CO2 year-1 depending on the type of energy utilization. Reduction of nutrients in the coastal zone by removal of seaweed was found to be of high value.
Original languageEnglish
Title of host publicationSardinia 2011 Proceedings – Thirteenth International Waste management and Landfill Symposium
Publication date2011
Publication statusPublished - 2011
EventSardinia 2011: Thirteenth International Waste Management and Landfill Symposium - Forte Village Resort, Sardinia, Italy
Duration: 3 Oct 20117 Oct 2011
Conference number: 13


SymposiumSardinia 2011
LocationForte Village Resort

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