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Results on the implementation of an innovative dehydrated biological waste to ethanol management scheme

  • A. Sotiropoulos
  • G. Xydis
  • N. Kontogianni
  • S. Vakalis
Short Communication

Abstract

The results of the 2 years of operation of a dehydrated biological waste to ethanol management and treatment scheme are presented within the context of this work. This state-of-the-art and innovative biological waste management scheme was implemented in two major Greek Municipalities. The purity level of the incoming material was almost 100% w/w (99.99% w/w), while a significant variation in the biological waste material properties has also been recorded not only between seasons but also on a yearly basis. The results also revealed that the average energy consumption of the waste dryer was found to be 0.9 kW h/kg, while it ranged between 0.89 and 0.91 kW h/kg. The mass reduction achieved was 82% w/w, while the maximum ethanol production without the use of further additives was 11.5% w/w which is considered to be a worth to further optimize performance. The use of commercialized enzyme products under specific conditions has revealed that almost 90% w/w of the starch, 50% and 40% w/w of the cellulose and hemicellulose, respectively, have the potential to be converted into sugars in order to be further treated for ethanol production.

Keywords

Waste management Drying Biofuels Bioeconomy 

Notes

Acknowledgements

This work has been elaborated in the framework of the LIFE + project entitled: Development and demonstration of an innovative method of converting waste into bioethanol, Waste2Bio (LIFE 11 ENV/GR/000949, 2012–2016), which is co-financed by the European Commission. The authors would also like to thank Novozymes Corporation for generously providing the enzyme samples used for the operation of the bioconversion facility, Vekkos Recycling Solutions for providing the decentralized biomass dryer for the needs of this research and Leaf Technologies for providing the yeast (Ethanol Red) samples for the fermentation process.

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Copyright information

© Islamic Azad University (IAU) 2018

Authors and Affiliations

  1. 1.Unit of Environmental Science and Technology, School of Chemical EngineeringNational Technical University of AthensAthensGreece
  2. 2.Department of Business Development and TechnologyAarhus UniversityHerningDenmark

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