title: Co-pyrolysis of sewage sludge and manure.
abstract: The management and valorization of residual organic matter, such as sewage sludge and manure, is gaining interest because of the increasing volume of these residues, their localized generation and the related problems. The anaerobic digestion of mixtures of sewage sludge and manure could be performed due to the similarities between both residues. The purpose of this study is to evaluate the feasibility of the co-pyrolysis of sewage sludge (SS) and digested manure (DM) as a potential management technology for these residues. Pyrolysis of a sewage sludge/manure blend (50:50%) was performed at 525°C in a stirred batch reactor under N2atmosphere. The product yields and some characteristics of the product were analyzed and compared to the results obtained in the pyrolysis of pure residues. Potential synergetic and antagonist effects during the co-pyrolysis process were evaluated. Although sewage sludge and manure seem similar in nature, there are differences in their pyrolysis product properties and distribution due to their distinct ash and organic matter composition. For the co-pyrolysis of SS and DM, the product yields did not show noticeable synergistic effects with the exception of the yields of organic compounds, being slightly higher than the predicted average, and the H2yield, being lower than expected. Co-pyrolysis of SS and DM could be a feasible management alternative for these residues in locations where both residues are generated, since the benefits and the drawbacks of the co-pyrolysis are similar to those of the pyrolysis of each residue.
authors.affiliation: Thermochemical Processes Group (GPT), Aragon Institute for Engineering Research (I3A), Universidad Zaragoza, Spain. Electronic address: nadiarui@unizar.es.
authors.forename: Nadia
authors.initials: N
authors.lastname: Ruiz-Gómez
authors.affiliation: Thermochemical Processes Group (GPT), Aragon Institute for Engineering Research (I3A), Universidad Zaragoza, Spain. Electronic address: vquispe@unizar.es.
authors.forename: Violeta
authors.initials: V
authors.lastname: Quispe
authors.affiliation: Thermochemical Processes Group (GPT), Aragon Institute for Engineering Research (I3A), Universidad Zaragoza, Spain. Electronic address: abrego@unizar.es.
authors.forename: Javier
authors.initials: J
authors.lastname: Ábrego
authors.affiliation: Thermochemical Processes Group (GPT), Aragon Institute for Engineering Research (I3A), Universidad Zaragoza, Spain. Electronic address: atienza@unizar.es.
authors.forename: María
authors.initials: M
authors.lastname: Atienza-Martínez
authors.affiliation: Thermochemical Processes Group (GPT), Aragon Institute for Engineering Research (I3A), Universidad Zaragoza, Spain. Electronic address: murillo@unizar.es.
authors.forename: María Benita
authors.initials: MB
authors.lastname: Murillo
authors.affiliation: Thermochemical Processes Group (GPT), Aragon Institute for Engineering Research (I3A), Universidad Zaragoza, Spain. Electronic address: glogea@unizar.es.
authors.forename: Gloria
authors.initials: G
authors.lastname: Gea
mesh_terms: D000818:Animals; D056804:Biofuels / Q000032:analysis; D019149:Bioreactors; D002264:Carboxylic Acids / Q000737:chemistry; D005740:Gases; D006358:Hot Temperature; D006859:Hydrogen / Q000737:chemistry; D006863:Hydrogen-Ion Concentration; D008372:Manure; D011312:Pressure; D012722:Sewage / Q000737:chemistry*; D017550:Spectroscopy, Fourier Transform Infrared; D013818:Thermogravimetry
chemical_list: D056804:Biofuels; D002264:Carboxylic Acids; D005740:Gases; D008372:Manure; D012722:Sewage; D006859:Hydrogen
keywords: Co-pyrolysis; Manure; Sewage sludge; Stirred batch reactor