Title:
Phytotoxicity of Sewage Sludge Biochars Prepared at Different Pyrolysis Conditions
Author(s):
Ábrego, J., Atienza-Martínez, M., Gimeno, J.R., Aibar, J., Quílez, D., Gea, G.
Document(s):
Paper
Slide presentation
Abstract:
Pyrolysis of sewage sludge was carried out at three different lab-scale reactors and conditions: an Auger reactor for sewage sludge pyrolysis at low temperature (300ºC), a stirred batch reactor (530ºC) and a fluidised bed reactor (530ºC). The starting material is anaerobically digested and thermally dried sewage sludge from a wastewater treatment plant located in Spain. A preliminary study to assess the feasibility of application to soil of the three biochars was performed using two germination tests and a greenhouse experiment. Water soluble compounds from biochar did not affect seed germination, but volatile compounds reduced germination of more sensitive seeds. Biochar applied to soil at agricultural rates (20 t/ha) reduced growth and development of a corn crop. No differential effects of the three pyrolysis conditions were found.
Keywords:
pyrolysis, sewage sludge, biochar, phytotoxicity
Topic:
Biomass Conversion Technologies for Liquid and Gaseous Fuels, Chemicals and Materials
Subtopic:
Pyrolysis and other biomass liquefaction technologies
Event:
23rd European Biomass Conference and Exhibition
Session:
3AO.9.3
Pages:
948 - 953
ISBN:
978-88-89407-516
Paper DOI:
10.5071/23rdEUBCE2015-3AO.9.3
Price:
FREE
