Biodegradation activity of eight organic substrates : a correlation study of different test methods
Evangelous, Alexandro (Democritus University of Thrace. Department of Environmental Engineering)
Calabrò, Paolo S. (Università degli Studi Mediterranea)
Greco, Rosa (Università degli Studi Mediterranea)
Sanchez, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Komilis, Dimitrios (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2016
Abstract:	The biological activity of eight organic substrates was assessed using different techniques under aerobic and anaerobic environments at different scales. The used substrates included simulated fresh to actual stabilized composts. Experiments included dynamic respiration (with 30 and 5. 5 L reactors), static respiration (with 1 L reactors) and biochemical methane potential (BMP) tests (with 1. 1 L flasks). The indices evaluated were: the 24-h dynamic respiration index (DRI₂₄) and the cumulative dynamic respiration indices at 4 and 7 days (DCRI₄ and DCRI₇, respectively) measured with two different methods, the maximum dynamic CO₂ generation rate (D-CO₂_24) at 24 h and a dynamic cumulative CO₂ generation after 7 days (D-CO₂_7), the maximum static O₂ consumption rate in 12 and 24 h (SRI₁₂ and SRI₂₄), the static cumulative O₂ consumptions after 4 and 7 days (SCRI₄ and SCRI7) and the static CO₂ generation after 7 days (S-CO₂) and the BMP after 30 days. The DRI₂₄ ranged from 25 to 3000 mg O2 kg−1 VS h−1 in one lab and from 150 to 3500 mg O₂ kg−1 VS h−1 in the other. A positive statistically significant correlation was achieved between the two types of dynamic indices. In addition, the CH4 production after 30 days showed a strong positive correlation with both DRI₂₄ indices and DCRI₄ and DCRI₇, as measured in both labs. The static respiration indices did not correlate well with the dynamic respiration ones. The practical implications of the use of the biodegradation activity indices were also analysed and discussed.
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Biochemical methane potential ; Compost ; Dynamic respiration index ; Organic substrate ; Respiration activity
Published in:	Waste and biomass valorization, Vol. 7, issue 5 (Oct. 2016) p. 1067-1080, ISSN 1877-2641

DOI: 10.1007/s12649-016-9532-2

Preprint 42 p, 717.0 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Engineering > Composting Research Group (GICOM)
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