4.7 Article

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

期刊

RENEWABLE ENERGY
卷 175, 期 -, 页码 108-118

出版社

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2021.05.018

关键词

Digestate; Hydrothermal carbonisation; Hydrochar; Porosity; SEM

资金

  1. European Commission
  2. National Center for Research and Development (Poland)
  3. Nederlandse Organisatie Voor Wetenschappelijk Onderzoek (Netherlands)
  4. Swedish Research Council Formas
  5. National Center for Research and Development [WATERWORKS2017/I/RECOWATDIG/01/2019]
  6. European Union from the European Social Fund [POWR.03.05.00-00-Z307/17-00]

向作者/读者索取更多资源

Digestate is a nutrient-rich substance produced by anaerobic digestion, which can be utilized as a solid biofuel, soil amendment substance, or substrate for activated carbon production. Hydrothermal carbonisation (HTC) is investigated as a pre-treatment method for digestate, resulting in changes in physical and chemical properties of the hydrochars.
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.

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