DBPapers
DOI: 10.5593/SGEM2014/B52/S20.051

INFLUENCE THE PROPERTIES OF SEWAGE SLUDGE CREATING MIXTURES WITH BIOCHAR

H. Hybska, A. Duricova
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-18-6 / ISSN 1314-2704, June 19-25, 2014, Book 5, Vol. 2, 383-390 pp

ABSTRACT
The experiments reported in this paper deal with the investigation of properties of
biochar with sewage sludge mixtures. Biochar was prepared from waste beech wood, corn waste and wheat straw in the experimental retort. Leaching of mixtures were simulated as natural conditions and the mobility of hazardous elements - manganese, copper, iron and lead was monitored. Elements in solid samples and their aqueous extracts were determined by the emission spectral analysis. Ecotoxicological properties of the extracts were evaluated by standard biotests. The experimental results demonstrate the inhibitory effect of biochar which had been added to the sewage sludge such a way that the rate of leachability of these elements into the water was reduced in comparison with the biochar sample without the addition of sewage sludge. In samples biochar operates as an adsorbent, or it is involved in retarding process of their availability into aqueous medium.

Keywords: sewage sludge, charcoal, risk elements, ecotoxicological tests