an official journal of: published by:
an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU


  • Stefano Caro - Department of Bioproducts and Biosystems, Aalto University, Finland
  • Matteo Ulivi - Department of Energy Engineering, Politecnico di Torino, Italy
  • Alessandro Ratto - Department of Biochemistry, Catholic University of Louvain, Belgium
  • Olli Dahl - Department of Bioproducts and Biosystems, Aalto University, Finland

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In this study, horse stable waste (horse manure, peat and wood sawdust) was processed under pyrolytic conditions. The chemical and physical properties of biochar obtained from different mixtures of horse stable residues were compared. All measurements followed an experimental design using a mixture model. This approach allowed the properties of any combination of ingredients to be predicted and the influence of each component on the final value to be estimated, with very good agreement between predicted and observed values. The results of the analysis of pH, polycyclic aromatic hydrocarbons (PAH), specific surface area (SSA) and CHNSO (carbon, hydrogen, nitrogen, sulphur and oxygen) showed that all possible combinations of materials can be used as soil amendments, since: an alkaline pH (>7) prevents soil acidification and a concentration of PAH below the limit (ΣPAH<12mg/kg) does not pose a risk to human health. A high SSA value (>180 m2/g) and a different particle size distribution (PSD) provide habitat for microorganisms, increase water retention capacity and reduce greenhouse gas (GHG) emissions from the soil.


Editorial History

  • Received: 30 May 2023
  • Revised: 10 Aug 2023
  • Accepted: 11 Sep 2023
  • Available online: 30 Sep 2023


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