Isolation of free-living dinitrogen-fixing bacteria and their activity in compost containing de-inking paper sludge
| Authors: | Beauchamp, Chantal Jeanne; Lévesque, Gabriel; Prévost, Danielle; Chalifour, François-Philippe |
| Abstract: | Knowledge of the microbiology of dinitrogen (N2)-fixing bacteria in compost rich in de-inking paper sludge (DPS) is limited. Dinitrogen (N2)-fixing bacteria from DPS composts were isolated and studied for their N2-fixing activity in vitro and in vivo. Two Gram-negative N2-fixing isolates were identified as Pseudomonas. At 20 C, both isolates revealed that N2-fixing activity was higher than that of three arctic Pseudomonas strains. Their N2-fixing activity was found to occur between 18 and 25 C, a pattern that was similar to the reference isolate Azotobacter ATCC 7486. Composts successfully showed N2-fixing activity after carbohydrate amendments both with and without inoculation of a N2-fixing isolate. These results suggest that DPS composts support N2-fixing bacteria and that N2-fixing activity is dependent on a usable carbohydrate source. 2005 Elsevier Ltd. All rights reserved. |
| Document Type: | Article de recherche |
| Issue Date: | 1 May 2006 |
| Open Access Date: | 16 March 2016 |
| Document version: | AM |
| Permalink: | http://hdl.handle.net/20.500.11794/350 |
| This document was published in: | Bioresource technology, Vol. 97 (8), 1002–1011 (2006) https://doi.org/10.1016/j.biortech.2005.04.041 Elsevier |
| Alternative version: | 10.1016/j.biortech.2005.04.041 |
| Collection: | Articles publiés dans des revues avec comité de lecture |
Files in this item:
| Description | Size | Format | ||
|---|---|---|---|---|
| Beauchamp al 2006 BioresTechnol 97 1002.pdf | 452.05 kB | Adobe PDF | View/Open | |
| Bact_Nfix_2006_BR_97_1002-1011.pdf | Version of Record | 305.11 kB | Adobe PDF | Request a copy |
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