Downgraded Potatoes Pellets: Energetic Potential and Optimisation of the Raw Material Drying

Authors: Godbout, S., C. Landry, J. Larouche, S. Fournel, P. Brassard, J. H. Palacios, A. Marciniak
Description: In developed countries, to support the demand, farmers have to produce a large quantity of high quality food. Primarily due to an improper storage, large quantities of agricultural products are downgraded and not commercialized. Indeed, in farms in the province of Quebec, 66,000 t year-1 of potatoes are wasted. Quebec policy regarding waste matter management suggests a reduction of the volume of residues at the source. These residues can be exploited if they are conditioned suitably. Otherwise, an inefficient management can cause pollution and pathogen risks. The objectives of this study are to: 1) evaluate the energetic potential of downgraded potatoes pellets in combustion and pyrolysis processes; and 2) study a new method of drying the raw material by dehydration by successive pressure drops (DSPD) treatment in such a way that it could be inserted within a transformation chain. Pyrolysis reactions of downgraded potatoes pellets produced satisfactorily bio-oil. However, the water content in bio-oils was very high (61.4 – 76.4%) thereby limiting the higher heating value (9 MJ kg-1). Consequently, bio-oil would have to be treated to decrease water content. Analysis showed that pellets had a good potential as fuel for combustion purposes. However, the calorific value (14.7 MJ kg-1) was slightly below than recommended by the literature (16.28 MJ kg-1). The DSPD treatment demonstrated a good potential for drying downgraded potatoes in order to avoid production and treatment costs of significant amounts of residual liquids obtained during water extraction of potatoes encouraging the application of this technology.
Keywords: pelletizing, downgraded potatoes, combustion, pyrolysis, drying process
Technical field: Renewable Energy
Conference name: CSBE/SCGAB 2015 Annual Conference, Edmonton, AB, 5-8 July 2015.
Session name: Bioenergy I - Pelletizing Biomass
Citation: Godbout, S., C. Landry, J. Larouche, S. Fournel, P. Brassard, J. H. Palacios, A. Marciniak. 2015. Pellet Production and Energetic Potential of Downgraded Potatoes. CSBE/SCGAB 2015 Annual Conference, Edmonton, AB, 5-8 July 2015.
Publisher: Canadian Society for Bioengineering
Date: 2015-07-05
Publication type:
  • Technical conference
Type: Text.Article
Identifier: CSBE15067
Coverage: Canada
Language 1: en
Rights: Canadian Society for Bioengineering

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