• English
  • Deutsch
  • Log In
    Password Login
    or
  • Research Outputs
  • Projects
  • Researchers
  • Institutes
  • Statistics
Repository logo
Fraunhofer-Gesellschaft
  1. Home
  2. Fraunhofer-Gesellschaft
  3. Artikel
  4. Hydrothermal carbonization of dry toilet residues as an added-value strategy - investigation of process parameters
 
  • Details
  • Full
Options
2019
Journal Article
Titel

Hydrothermal carbonization of dry toilet residues as an added-value strategy - investigation of process parameters

Abstract
Human faeces from a dry toilet are converted via hydrothermal carbonization to obtain a sterilized carbonaceous material. During this process the original material undergoes consecutively hydrolysis, water elimination and polymerization reactions. Consequently, the oxygen content is reduced, leading to a material with a better dewaterability and an attractive higher heating value (HHV = 22-28 MJ kg −1). The influence of pH-value, set by the addition of citric acid, the reaction time and the reaction temperature are investigated. By thermo-gravimetric analysis it is shown that especially higher acid concentration as well as higher reaction temperatures and longer reaction times are necessary to fully convert the feedstock into a stable carbon-rich material. As pathogens are destroyed by hydrothermal carbonization, nutrient recovery becomes a relevant aspect. The analysis shows that alkali salts such as sodium and potassium are dissolved in the aqueous phase, but an important proportion of the phosphorus and nitrogen remain in the hydrochar. This finding is the basis for phosphorus recycling or to produce an organic fertilizer.
Author(s)
Wüst, Dominik
University of Hohenheim
Rodiguez Correa, Catalina
University of Hohenheim
Suwelack, Kay
Fraunhofer-Institut für Naturwissenschaftlich-Technische Trendanalysen INT
Köhler, Hermann
Karlsruhe Institute of Technology
Kruse, Andrea
University of Hohenheim
Zeitschrift
Journal of environmental management
Thumbnail Image
DOI
10.1016/j.jenvman.2019.01.005
Language
English
google-scholar
Fraunhofer-Institut für Naturwissenschaftlich-Technische Trendanalysen INT
Tags
  • Hydrothermal Carboniz...

  • dry toilet residue

  • human faeces

  • Hydrochar

  • energy carrier

  • nutrient recycling

  • Cookie settings
  • Imprint
  • Privacy policy
  • Api
  • Send Feedback
© 2022