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Evaluation of Integrated Anaerobic Digestion and Hydrothermal Carbonization for Bioenergy Production
Published on: June 15, 2014
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Agro-industrial waste to solid biofuel through hydrothermal carbonization
Daniele Basso1, Francesco Patuzzi2, Daniele Castello1
1University of Trento, Department of Civil, Environmental and Mechanical Engineering, Italy.
Waste Management (New York, N.Y.)
|June 3, 2015
Summary
Grape marc, a winery waste, can be converted into a valuable solid biofuel via hydrothermal carbonization. This process yields hydrochar with high energy content and minimal gas production, making it an environmentally sound energy source.
Area of Science:
- Biomass energy conversion
- Thermochemical processing of waste materials
Background:
- Grape marc is a lignocellulosic byproduct of winemaking, abundant globally.
- High moisture content of grape marc poses challenges for conventional energy recovery methods.
Purpose of the Study:
- Investigate the energetic potential of grape marc using hydrothermal carbonization.
- Evaluate the properties of hydrochar produced from grape marc.
Main Methods:
- Hydrothermal carbonization experiments conducted in a 50 mL apparatus.
- Varied temperatures (180-250 °C) and residence times (1-8 h).
- Analysis of solid (hydrochar) and gaseous products, including calorific value, elemental composition, and thermal stability.
Main Results:
- Hydrochar produced exhibited high heating values (HHV) ranging from 19.8 to 24.1 MJ/kg.
- The process generated minimal gaseous byproducts, indicating environmental advantages.
- Temperature was found to be a more significant factor than residence time in influencing the process outcomes.
Conclusions:
- Hydrothermal carbonization is a viable method for upgrading grape marc into a solid biofuel.
- The resulting hydrochar possesses favorable characteristics for energy applications.
- The process offers an environmentally beneficial route for winery waste valorization.
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