Respirometric assays at fixed and process temperatures to monitor composting process
Barrena Gómez, Raquel (Escola Universitària Politècnica del Medi Ambient (Mollet del Vallès, Catalunya))
Vázquez Lima, Felícitas (Escola Universitària Politècnica del Medi Ambient (Mollet del Vallès, Catalunya))
Gordillo Bolasell, M. Àngels (Escola Universitària Politècnica del Medi Ambient (Mollet del Vallès, Catalunya))
Gea Leiva, Teresa (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Sanchez, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Additional title:	The use of respirometric techniques for the monitoring of the composting process : comparison of assays at fixed and process
Date:	2005
Abstract:	A static respirometer was built to determine the respiration index (RI) of composting samples. Respiration indices of different sludges were determined at 37 °C (RI₃₇) and at the in situ temperature of the composter at sampling (RIT). Results indicated that both indices correlated well with temperature evolution in the composter. RIT were more representative of the metabolic activity in the reactor and more sensitive to temperature and composition variations of the composting material, but could not indicate the stability of the material at later stages of the process. Moreover, significance of RI units was shown in the composting of a highly compostable residue. According to the stability limits suggested in the literature, initial RI expressed on dry matter (DM) basis corresponds to a stable material (RI < 1 mg O₂ g DM⁻¹ h⁻¹) whereas initial RI expressed on organic matter basis (OM) corresponds to an unstable material (RI = 2. 5 mg O₂ g OM⁻¹ h⁻¹).
Grants:	Ministerio de Ciencia y Tecnología REN2003-00823
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Composting, sludge ; Respirometric index ; Monitoring ; Stability
Published in:	Bioresource technology, Vol. 96, issue 10 (July 2005) , p. 1153-1159, ISSN 0960-8524

DOI: 10.1016/j.biortech.2004.09.026

Pre-print 24 p, 1.5 MB

The record appears in these collections:
Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > Composting Research Group (GICOM)
Articles > Research articles
Articles > Published articles