Novel denitrifying bacteria Pseudomonas stutzeri strain D1 - from isolation to the biomass production
An aerobic denitrifier was newly isolated and identified by VITEK? 2 Compact System and MALDI-TOF MS as P. stutzeri strain D1. Sequence amplification indicates that the denitrification genes napA, nirS, norB and nosZ are present in a novel strain D1, as well as in reference strain ATCC 17588. Strain...
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Published in | Chemical Industry & Chemical Engineering Quarterly Vol. 25; no. 4; pp. 403 - 415 |
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Main Authors | , , , , , , |
Format | Journal Article |
Language | English |
Published |
Belgrade
Association of the Chemical Engineers of Serbia
01.10.2019
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Online Access | Get full text |
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Summary: | An aerobic denitrifier was newly isolated and identified by VITEK? 2 Compact System and MALDI-TOF MS as P. stutzeri strain D1. Sequence amplification indicates that the denitrification genes napA, nirS, norB and nosZ are present in a novel strain D1, as well as in reference strain ATCC 17588. Strain D1 had capability to fully remove 3 g/L of nitrate (as KNO3) in 48 h, while the reference strain completed this task in 60 h. Single factor experiments indicate that the optimal conditions for biomass production were: temperature of 30?C, pH value of 7 and inoculum volume of 5 vol.%. Scaling up of biomass production of both denitrifiers was successfully performed in 3 and 7 L laboratory bioreactors by reaching 9 log CFU/mL of the viable cells. The results demonstrate the feasibility of using investigated P. stutzeri strains in denitrification processes and the simplicity of the up-scaling of biomass production for the treatment of large areas contaminated with nitrate. |
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ISSN: | 1451-9372 2217-7434 |
DOI: | 10.2298/CICEQ190111018V |