Multiphase analysis of hydrochars obtained by anaerobic digestion of municipal solid waste organic fraction

RENEWABLE ENERGY

卷:175

Article

Magdziarz, Aneta¹  Mlonka-Medrala, Agata¹  Sieradzka, Malgorzata¹  Aragon-Briceno, Christian²  Pozarlik, Artur²  Bramer, Eddy A.²  Brem, Gerrit²  Niedzwiecki, Lukasz³  Pawlak-Kruczek, Halina³ 

[1] AGH Univ Sci & Technol, Al Mickiewicza 30, PL-30059 Krakow, Poland

[2] Univ Twente, Postbus 217, NL-7500 AE Enschede, Netherlands

[3] Wroclaw Univ Sci & Technol, Wybrzeze Wyspianskiego 27, PL-50370 Wroclaw, Poland

关键词: Digestate;    Hydrothermal carbonisation;    Hydrochar;    Porosity;    SEM;   

DOI  :  10.1016/j.renene.2021.05.018

来源: Elsevier

【 摘 要 】

Digestate is a nutrient-rich substance produced by anaerobic digestion that contains organic, inorganic, and biological matter. The European Nitrates Directive (91/676/EEC) provides regulations regarding the wider implementation of the digestate. Owing to a significant amount of organic matter in the digestate, it can be utilised as a solid biofuel, soil amendment substance, or substrate for activated carbon pro-duction. However, the solid by-products of the anaerobic digestion of the municipal solid waste wet fraction cannot be used for such applications because it is still considered a waste. Hydrothermal car-bonisation (HTC) was investigated as a pre-treatment method for the digestate obtained by anaerobic digestion of the municipal solid waste wet fraction. HTC was carried out at temperatures of 180, 200 and 230 degrees C and residence times of 30, 60 and 120 min. The value of pressure was determined based on water temperature and partial pressure of the gaseous by-products. The HTC process resulted in changes in the physical and chemical properties of the hydrochars compared to those of the raw materials. A temper-ature of 200 degrees C and residence time of 60 min during HTC were optimal for energy consumption; this hydrochar exhibited the best combustion parameters and physical properties (specific surface area). (C) 2021 The Author(s). Published by Elsevier Ltd.

【 授权许可】

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