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Effect of sewage sludge properties on the biochar characteristic

TitleEffect of sewage sludge properties on the biochar characteristic
Publication TypeJournal Article
Year of Publication2015
AuthorsZielińska, Anna, Oleszczuk Patryk, Charmas Barbara, Skubiszewska-Zięba Jadwiga, and Pasieczna-Patkowska Sylwia
JournalJournal of Analytical and Applied Pyrolysis
Date Published1/2015

The present study evaluated how the initial sewage sludge properties affect the characteristics and composition of sewage sludge-based biochars. Sewage sludges of varying organic matter content were pyrolyzed at temperatures of 500, 600 and 700 °C. The obtained materials were characterized in terms of their composition and physicochemical as well as their surface and thermal properties. With increasing treatment temperature, the pH, ash content and macro- and micronutrient content increased. The biochar aromaticity also increased. On the other hand, the pyrolysis yield, percentages of H, N and O, molar ratios, polarity of biochars, and crystallite size decreased. The direction of the changes in the content of elemental carbon (C) and in surface area was dependent on the type of sewage sludge. It was found that for some properties of biochars produced could be determined on the basis of an analysis of the properties of the initial sewage sludge.

Short TitleJournal of Analytical and Applied Pyrolysis