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Isolation and characterization of sulfur-utilizing denitrifiers from the sulfur-oxidizing denitrification process

Of 14 potential sulfur-oxidizing strains, Pseudomonas sp. B21 and Agrobacterium sp. B19 were considered as denitrifiers. Under aerobic conditions, with S0 as electron donor, maximum cell growth rates were 0.022 (B21) and 0.043 h-1 (B19). Both grew optimally at pH 7.5 and 28 C. When NO3-N was increas...

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Published in:	Biotechnology letters 2003-10, Vol.25 (19), p.1605-1608
Main Authors:	Tian, D, Shon, H.K, Chun, D.J, Jin, C.S, Gwon, E.M, Chung, W.J
Format:	Article
Language:	English
Subjects:	Aerobic conditions Agrobacterium Bacteria Bioreactors - microbiology Cell Culture Techniques - methods cell growth denitrification denitrifying microorganisms Hydrogen-Ion Concentration nitrate nitrate nitrogen nitrates Nitrates - metabolism Nutrient removal Organic compounds Oxidation-Reduction Oxygen Consumption - physiology Pseudomonas Pseudomonas - classification Pseudomonas - growth & development Pseudomonas - isolation & purification Pseudomonas - metabolism Rhizobium - classification Rhizobium - growth & development Rhizobium - isolation & purification Rhizobium - metabolism Species Specificity Sulfur Sulfur Compounds - metabolism
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creator	Tian, D Shon, H.K Chun, D.J Jin, C.S Gwon, E.M Chung, W.J
description	Of 14 potential sulfur-oxidizing strains, Pseudomonas sp. B21 and Agrobacterium sp. B19 were considered as denitrifiers. Under aerobic conditions, with S0 as electron donor, maximum cell growth rates were 0.022 (B21) and 0.043 h-1 (B19). Both grew optimally at pH 7.5 and 28 C. When NO3-N was increased from 10 to 200 mg l-1 the efficiency of nitrate removal of each strain gradually decreased, from 60 to 40%. Addition of suitable organic compounds (C/N < 4.2) increased the nitrate removal efficiencies of both strains, indicating their mixotrophic characters.
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subjects	Aerobic conditions Agrobacterium Bacteria Bioreactors - microbiology Cell Culture Techniques - methods cell growth denitrification denitrifying microorganisms Hydrogen-Ion Concentration nitrate nitrate nitrogen nitrates Nitrates - metabolism Nutrient removal Organic compounds Oxidation-Reduction Oxygen Consumption - physiology Pseudomonas Pseudomonas - classification Pseudomonas - growth & development Pseudomonas - isolation & purification Pseudomonas - metabolism Rhizobium - classification Rhizobium - growth & development Rhizobium - isolation & purification Rhizobium - metabolism Species Specificity Sulfur Sulfur Compounds - metabolism
title	Isolation and characterization of sulfur-utilizing denitrifiers from the sulfur-oxidizing denitrification process
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