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Poster De Conférence Année : 2011

Environmental assessment of a biomethane production system from offshore-cultivated macroalgae

Résumé

Biofuels from algal biomass seem to be a promising source of bioenergyfor the future. Life Cycle Assessment (LCA) is an efficient tool for quantifyingenvironmental impacts of bio-based materials. To assess if macroalgae iseffectively an environmentally friendly feedstock for bioenergy production, acomparative LCA is used in this study. The functional unit used is one MJconsumed in an internal combustion engine. Methane from anaerobic digestion ofmacroalgae is compared to natural gas as a fossil fuel reference. The study iscarried out on the brown seaweed Laminaria saccharina cultivated in a coastalenvironment. The ReCiPe method is used for the impact assessment. The resultshighlight that one of the key improvements to focus on is electric consumption. Afirst stage of ecodesign by coupling offshore wind turbines and seaweedproduction allows enhancements. Interesting levels of impacts by comparison withthe fossil fuel reference are reached: reduction of 51.0% of the greenhouse gasemissions and of 72.4% of the fossil depletion. Despite its recent attention, furtherimprovements can be achieved in the near future to make the use of macroalgaefor biofuels production competitive compared with terrestrial feedstock from anenvironmental point of view.
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Dates et versions

hal-02746553 , version 1 (03-06-2020)

Identifiants

  • HAL Id : hal-02746553 , version 1
  • PRODINRA : 311703

Citer

Juliette Langlois, Arnaud Helias, Jean-Philippe Delgenès, Jean-Philippe Steyer. Environmental assessment of a biomethane production system from offshore-cultivated macroalgae. LCM2011 - 3. Conférence Internationale Life Cycle Management, Aug 2011, Berlin, Germany. , 2011. ⟨hal-02746553⟩
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