Exergetic comparison of food waste valorization in industrial bread production

F.K. Zisopoulos, S.N. Moejes, F.J. Rossier Miranda, A.J. van der Goot, R.M. Boom

Research output: Contribution to journalArticleAcademicpeer-review

32 Citations (Scopus)

Abstract

This study compares the thermodynamic performance of three industrial bread production chains: one that generates food waste, one that avoids food waste generation, and one that reworks food waste to produce new bread. The chemical exergy flows were found to be much larger than the physical exergy consumed in all the industrial bread chains studied. The par-baked brown bun production chain had the best thermodynamic performance because of the highest rational exergetic efficiency (71.2%), the lowest specific exergy losses (5.4 MJ/kg brown bun), and the almost lowest cumulative exergy losses (4768 MJ/1000 kg of dough processed). However, recycling of bread waste is also exergetically efficient when the total fermented surplus is utilizable. Clearly, preventing material losses (i.e. utilizing raw materials maximally) improves the exergetic efficiency of industrial bread chains. In addition, most of the physical (non-material related) exergy losses occurred at the baking, cooling and freezing steps. Consequently, any additional improvement in industrial bread production should focus on the design of thermodynamically efficient baking and cooling processes, and on the use of technologies throughout the chain that consume the lowest possible physical exergy.
Original languageEnglish
Pages (from-to)640-649
JournalEnergy
Volume82
DOIs
Publication statusPublished - 2015

Keywords

  • sustainability assessment
  • energy
  • consumption
  • transport
  • dryer

Fingerprint Dive into the research topics of 'Exergetic comparison of food waste valorization in industrial bread production'. Together they form a unique fingerprint.

  • Cite this