Environmental innocuousness of the activation of a microbial consortium from creosotecontaminated soil in a slurry bioreactor. Issue 6 (3rd November 2008)

• Record Type: Journal Article
• Authors: Deschênes, Louise; D'Amours, Dominic; Samson, Réjean
• Is Part Of: Journal of environmental engineering and science. Volume 7:Issue 6(2008)
• Page Start: 581
• Page End: 595
• Publication Date: 2008-11-03
• Subjects: PAH; -- biodegradation; -- soil slurry; -- DGGE; -- bioaugmentation; -- indigenous microbial consortium; Environmental engineering -- Periodicals; Sanitary engineering -- Periodicals; Environmental engineering -- Canada -- Periodicals; Environnement, Technique de l' -- Périodiques; Technique sanitaire -- Périodiques; Environnement, Technique de l' -- Canada -- Périodiques; Environmental engineering; Sanitary engineering; Canada; Electronic journals; Computer network resources; Periodicals; 628.05
• DOI: 10.1139/S08-033
• Languages: English
• ISSNs: 1496-2551

Abstract

Abstract : A laboratory study was conducted to assess the environmental innocuousness of an inoculum production (soil activation) to be used in the bioaugmentation of creosote-contaminated soils. The activation was carried out through multiple creosote addition. The increased biodegradation and mineralisation rates of the polycyclic aromatic hydrocarbons (PAHs) indicate that the metabolic capabilities of the microbial consortium were enhanced during activation. The PAH mass balance shows a removal of 96.4%. Biodegradation contributed to the removal of the 3-ring (37%-67%), 4-ring (50%-73%), and 5&6-ring (1%-53%) PAHs. Abiotic losses were significant in 2 and 3-ring PAHs. An increase in phenanthrene degraders from 2.1 × 10 5 to 1.0 × 10 8 CFU mL -1 was observed. Denaturing gradient gel electrophoresis analyses indicate the occurrence of a selection of microbial strains, but biodiversity is probably unaffected by creosote addition. Results suggest that soil activation may have the potential to ensure the environmental safety of the bioaugmentation of creosote-contaminated soil.