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      Heterotrophic ammonium removal by a novel hatchery isolate Acinetobacter calcoaceticus STB1

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      Author
      Sarioglu O.F.
      Suluyayla, R.
      Tekinay, T.
      Date
      2012
      Source Title
      International Biodeterioration and Biodegradation
      Print ISSN
      0964-8305
      Volume
      71
      Pages
      67 - 71
      Language
      English
      Type
      Article
      Item Usage Stats
      130
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      98
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      Abstract
      A novel bacterial strain, STB1, was isolated from a commercial sea bass hatchery and found to display high heterotrophic ammonium removal characteristics at different concentrations of ammonium (NH4+-N). The species identity of STB1 was determined via 16S rRNA gene sequence analysis to be Acinetobacter calcoaceticus. We evaluated ammonium removal characteristics of STB1 at varying ammonium concentrations, and observed that STB1 can almost completely remove ammonium at low (50 mg l -1), and medium (100 mg l -1) concentrations within 72 h, while 45% ammonium removal was observed at a higher concentration (210 mg l -1) during the same period. Trace amount of the metabolized ammonium was converted to nitrite or nitrate and 22.16% of total nitrogen was incorporated into cell biomass, while 4.34% of total nitrogen was initially incorporated into cell biomass and subsequently released to the supernatant fraction in the 100 mg l -1 sample. Most of the remaining conversion products are expected to be gaseous denitrification products. Toxicological studies with Artemia salina (brine shrimp) nauplii revealed that STB1 strain is non-toxic to Artemia larvae, which suggests that STB1 can be safely and efficiently utilized in water quality enrichment in aquatic ecosystems. © 2012 Elsevier Ltd.
      Keywords
      16S rRNA phylogenetic analysis
      Acinetobacter calcoaceticus STB1
      Artemia nauplii
      Heterotrophic ammonium removal
      16S rRNA gene sequence
      Acinetobacter calcoaceticus
      Ammonium concentrations
      Ammonium removal
      Aquatic ecosystem
      Artemia
      Artemia salina
      Bacterial strains
      Cell biomass
      Phylogenetic analysis
      Sea bass
      Supernatant fractions
      Total nitrogen
      Trace amounts
      RNA
      Water quality
      Ammonium compounds
      ammonia
      bacterium
      concentration (composition)
      crustacean
      denitrification
      genetic analysis
      hatchery
      heterotrophy
      perciform
      phylogenetics
      pollutant removal
      toxicology
      water quality
      Acinetobacter calcoaceticus
      Artemia
      Artemia salina
      Bacteria (microorganisms)
      Serranidae
      Permalink
      http://hdl.handle.net/11693/21417
      Published Version (Please cite this version)
      http://dx.doi.org/10.1016/j.ibiod.2012.04.012
      Collections
      • Department of Molecular Biology and Genetics 426
      • Institute of Materials Science and Nanotechnology (UNAM) 1775
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