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Title: Clay-sewage sludge co-pyrolysis. A TG-MS and Py-GC study on potential advantages afforded by the presence of clay in the pyrolysis of wastewater sewage sludge

Abstract

Wastewater sewage sludge was co-pyrolyzed with a well characterized clay sample, in order to evaluate possible advantages in the thermal disposal process of solid waste. Characterization of the co-pyrolysis process was carried out both by thermogravimetric-mass spectrometric (TG-MS) analysis, and by reactor tests, using a lab-scale batch reactor equipped with a gas chromatograph for analysis of the evolved gas phase (Py-GC). Due to the presence of clay, two main effects were observed in the instrumental characterization of the process. Firstly, the clay surface catalyzed the pyrolysis reaction of the sludge, and secondly, the release of water from the clay, at temperatures of approx. 450-500 deg. C, enhanced gasification of part of carbon residue of the organic component of sludge following pyrolysis. Moreover, the solid residue remaining after pyrolysis process, composed of the inorganic component of sludge blended with clay, is characterized by good features for possible disposal by vitrification, yielding a vitreous matrix that immobilizes the hazardous heavy metals present in the sludge.

Authors:
 [1];  [1];  [2];  [3]
  1. Department of Materials Engineering and Industrial Technologies, University of Trento, via Mesiano 77, 38100 Trento (Italy)
  2. Department of Civil and Environmental Engineering, University of Trento, via Mesiano 77, 38100 Trento (Italy)
  3. Faculty of Science and Technology, Free University of Bolzano, Piazza Universita 5, 39100 Bolzano (Italy)
Publication Date:
OSTI Identifier:
21541761
Resource Type:
Journal Article
Journal Name:
Waste Management
Additional Journal Information:
Journal Volume: 31; Journal Issue: 1; Other Information: DOI: 10.1016/j.wasman.2010.05.027; PII: S0956-053X(10)00316-8; Copyright (c) 2010 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Journal ID: ISSN 0956-053X
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; 12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; CARBON; CLAYS; GAS CHROMATOGRAPHY; GASIFICATION; HEAVY METALS; MASS SPECTROSCOPY; PYROLYSIS; RESIDUES; SEWAGE SLUDGE; SOLID WASTES; THERMAL GRAVIMETRIC ANALYSIS; VITRIFICATION; WASTE WATER; BIOLOGICAL MATERIALS; BIOLOGICAL WASTES; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; CHROMATOGRAPHY; DECOMPOSITION; ELEMENTS; GRAVIMETRIC ANALYSIS; HYDROGEN COMPOUNDS; LIQUID WASTES; MATERIALS; METALS; MINERALS; NONMETALS; OXYGEN COMPOUNDS; QUANTITATIVE CHEMICAL ANALYSIS; SEPARATION PROCESSES; SEWAGE; SILICATE MINERALS; SLUDGES; SPECTROSCOPY; THERMAL ANALYSIS; THERMOCHEMICAL PROCESSES; WASTES; WATER

Citation Formats

Ischia, Marco, Maschio, Roberto Dal, Grigiante, Maurizio, and Baratieri, Marco. Clay-sewage sludge co-pyrolysis. A TG-MS and Py-GC study on potential advantages afforded by the presence of clay in the pyrolysis of wastewater sewage sludge. United States: N. p., 2011. Web. doi:10.1016/j.wasman.2010.05.027.
Ischia, Marco, Maschio, Roberto Dal, Grigiante, Maurizio, & Baratieri, Marco. Clay-sewage sludge co-pyrolysis. A TG-MS and Py-GC study on potential advantages afforded by the presence of clay in the pyrolysis of wastewater sewage sludge. United States. https://doi.org/10.1016/j.wasman.2010.05.027
Ischia, Marco, Maschio, Roberto Dal, Grigiante, Maurizio, and Baratieri, Marco. 2011. "Clay-sewage sludge co-pyrolysis. A TG-MS and Py-GC study on potential advantages afforded by the presence of clay in the pyrolysis of wastewater sewage sludge". United States. https://doi.org/10.1016/j.wasman.2010.05.027.
@article{osti_21541761,
title = {Clay-sewage sludge co-pyrolysis. A TG-MS and Py-GC study on potential advantages afforded by the presence of clay in the pyrolysis of wastewater sewage sludge},
author = {Ischia, Marco and Maschio, Roberto Dal and Grigiante, Maurizio and Baratieri, Marco},
abstractNote = {Wastewater sewage sludge was co-pyrolyzed with a well characterized clay sample, in order to evaluate possible advantages in the thermal disposal process of solid waste. Characterization of the co-pyrolysis process was carried out both by thermogravimetric-mass spectrometric (TG-MS) analysis, and by reactor tests, using a lab-scale batch reactor equipped with a gas chromatograph for analysis of the evolved gas phase (Py-GC). Due to the presence of clay, two main effects were observed in the instrumental characterization of the process. Firstly, the clay surface catalyzed the pyrolysis reaction of the sludge, and secondly, the release of water from the clay, at temperatures of approx. 450-500 deg. C, enhanced gasification of part of carbon residue of the organic component of sludge following pyrolysis. Moreover, the solid residue remaining after pyrolysis process, composed of the inorganic component of sludge blended with clay, is characterized by good features for possible disposal by vitrification, yielding a vitreous matrix that immobilizes the hazardous heavy metals present in the sludge.},
doi = {10.1016/j.wasman.2010.05.027},
url = {https://www.osti.gov/biblio/21541761}, journal = {Waste Management},
issn = {0956-053X},
number = 1,
volume = 31,
place = {United States},
year = {Sat Jan 15 00:00:00 EST 2011},
month = {Sat Jan 15 00:00:00 EST 2011}
}