Bioremediation of PAHs-contaminated soil through composting : influence of bioaugmentation and biostimulation on the contaminants biodegradation
Sayara, Tahseen A. S. (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Borràs Camps, Eduard (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Caminal i Saperas, Glòria (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Sarrà i Adroguer, Montserrat (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)
Sanchez, Antoni (Universitat Autònoma de Barcelona. Departament d'Enginyeria Química, Biològica i Ambiental)

Date:	2011
Abstract:	The degradation of several polycyclic aromatic hydrocarbons (PAHs) in soil through composting was investigated. The selected PAHs included: fluorene, phenanthrene, anthracene, fluoranthene, pyrene, benzo(a)anthracene, and chrysene, with concentrations simulating a real creosote sample. The degradation of PAHs (initial concentration 1 g of total PAHs kg⁻¹ dry soil) was assessed applying bioaugmentation with the white-rot fungi Trametes versicolor and biostimulation using compost of the source-selected organic fraction of municipal solid waste (OFMSW) and rabbit food as organic co-substrates. The process performance during 30 days of incubation was evaluated through different analyses including: dynamic respiration index (DRI), cumulative oxygen consumption during 5 days (AT₅), enzymatic activity, and fungal biomass. These analyses demonstrated that the introduced T. versicolor did not significantly enhance the degradation of PAHs. However, biostimulation was able to improve the PAHs degradation: 89% of the total PAHs were degraded by the end of the composting period (30 days) compared to the only 29. 5% that was achieved by the soil indigenous microorganisms without any co-substrate (control, not amended). Indeed, the results showed that stable compost from the OFMSW has a greater potential to enhance the degradation of PAHs compared to non-stable co-substrates such as rabbit food.
Grants:	Ministerio de Educación y Ciencia CTM2009-14073-C02-01
Rights:	Tots els drets reservats.
Language:	Anglès
Document:	Article ; recerca ; Versió sotmesa a revisió
Subject:	Composting ; Polycyclic aromatic hydrocarbons (PAHs) ; Bioaugmentation ; Biostimulation ; Stability
Published in:	International biodeterioration & biodegradation, Vol. 65, Issue 6 (Sep. 2011) , p. 859-865, ISSN 0964-8305

DOI: 10.1016/j.ibiod.2011.05.006

Pre-print 33 p, 544.8 KB

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