Utilization of Sewage Sludge-Derived Pyrogenic Material as a Promising Soil Amendment - Frišták, Vladimír (Trnava University in Trnava. Department of Chemistry) ; Pipíška, Martin (Trnava University in Trnava. Department of Chemistry) ; Koperová, Dominika (Trnava University in Trnava. Department of Chemistry) ; Jagerhofer, Reinhard (Austrian Institute of Technology GmbH. Energy Department) ; Soja, Gerhard (Austrian Institute of Technology GmbH. Energy Department) ; Bell, Stephen Mackenzie (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)