Heiske, Stefan

Jensen, Pernille Erland

The fish industry is a main industry in many Arctic locations. In most places by-products are disposed of at sea. Oxygen depletion and dead sea bottom is observed, as the organic material is biodegraded and methane produced; contributing to the global warming. In this study, the biogas potential of fish industry by-products from Greenland was investigated. Methane potential of Greenlandic shrimp, crab, and halibut by-products as well as co-digestion of shrimp by-products with waste water sludge and common brown algae was tested in lab scale batch experiments at mesophilic conditions. Fate of indicator microorganisms was investigated. All residues had biogas potentials similar to or higher than conventional feedstocks like manure and silage. Waste water sludge and brown algae had potentials comparable to manure. The combined shrimp and algae digestion showed indication of synergistic effects. Indicator bacteria were reduced significantly while coliphages (virus indicators) were not. Fish and seafood by products from the fish processing industry constitute a significant resource for energy and may provide an economic incentive to install digesters, which can also partly stabilize waste water sludge, though additional heat treatment may be necessary depending on final use of digestate

Online Research Database In Technology

                       General rights Copyright and moral rights for the publications made accessible in the public portal are retained by the authors and/or other copyright owners and it is a condition of accessing publications that users recognise and abide by the legal requirements associated with these rights.  • Users may download and print one copy of any publication from the public portal for the purpose of private study or research. • You may not further distribute the material or use it for any profit-making activity or commercial gain • You may freely distribute the URL identifying the publication in the public portal   If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.     Downloaded from orbit.dtu.dk on: Dec 18, 2017Potentials and challenges of biogas from fish industry waste in the arcticJensen, Pernille Erland; Heiske, StefanPublished in:International Conference on Materials, Systems and Structures in Civil EngineeringPublication date:2016Document VersionPublisher's PDF, also known as Version of recordLink back to DTU OrbitCitation (APA):Jensen, P. E., & Heiske, S. (2016). Potentials and challenges of biogas from fish industry waste in the arctic. InInternational Conference on Materials, Systems and Structures in Civil Engineering: Conference workshop onCold Region Engineering (pp. 69-69). Technical University of Denmark, Department of Civil Engineering.  (B Y GD T U. Rapport; No. Byg R-352).69International Conference on Materials, Systems and Structures in Civil EngineeringConference workshop on Cold Regions Engineering24 August 2016, Technical University of Denmark, Lyngby, DenmarkPOTENTIALS AND CHALLENGES OF BIOGAS FROM FISH INDUSTRY WASTE IN THE ARCTICPernille Erland Jensen (1), Stefan Heiske (2)(1) Department of Civil Engineering, Technical University of Denmark, Lyngby, Denmark(2) Department of Chemical Engineering, Technical University of Denmark.AbstractThe fish industry is a main industry in many Arctic locations. In most places by-products are disposed of at sea. Oxygen depletion and dead sea bottom is observed, as the organic material is biodegraded and methane produced; contributing to the global warming. In this study, the biogas potential of fish industry by-products from Greenland was investigated. Methane potential of Greenlandic shrimp, crab, and halibut by-products as well as co-digestion of shrimp by-products with waste water sludge and common brown algae was tested in lab scale batch experiments at mesophilic conditions. Fate of indicator microorganisms was investigated. All residues had biogas potentials similar to or higher than conventional feedstocks like manure and silage. Waste water sludge and brown algae had potentials comparable to manure. The combined shrimp and algae digestion showed indication of synergistic effects. Indicator bacteria were reduced significantly while coliphages (virus indicators) were not. Fish and seafood by products from the fish processing industry constitute a significant resource for energy and may provide an economic incentive to install digesters, which can also partly stabilize waste water sludge, though additional heat treatment may be necessary depending on final use of digestate.

Potentials and challenges of biogas from fish industry waste in the arctic

http://orbit.dtu.dk/ws/files/128001632/Pages_from_Cold_region_engineering_conf_proceedings_2_6.pdf

Potentials and challenges of biogas from fish industry waste in the arctic

Abstract

Similar works

Full text

Available Versions

Online Research Database In Technology