Document Detail


Nitrate reduction with Halomonas campisalis. Kinetics of denitrification at pH 9 and 12.5% NaCl.
MedLine Citation:
PMID:  11791855     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Regeneration of ion exchange resins with NaCl produces brine containing high concentrations of nitrate that can be difficult to remove using standard biological, physical, or chemical technologies. In this study. Halomonas campisalis (ATCC #700597) (Mormile et al., 1999) was shown to completely reduce nitrate at 125 g/L NaCl and pH 9. This organism was also used in experiments to determine nitrate-reduction rates and biomass yields. Kinetic parameters were measured separately with glycerol, lactate. acetate, ethanol, and methanol. The specific nitrate-reduction rate coefficient was highest in cultures amended with acetate, while lactate and glycerol (a natural osmoticum in hypersaline environments) had lower reduction rates. No evidence of nitrate reduction was observed when ethanol or methanol was provided as an electron donor. Kinetic modeling provided values for nitrate and nitrite-reduction rate coefficients and for biomass yields. Measured rates and yields were similar to reported parameters obtained from non-halophilic nitrate-reducing cultures under low salt concentrations. Therefore, for highly saline solutions, the use of halophiles to selectively remove nitrate from these brines may represent a viable treatment option.
Authors:
B M Peyton; M R Mormile; J N Petersen
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Water research     Volume:  35     ISSN:  0043-1354     ISO Abbreviation:  Water Res.     Publication Date:  2001 Dec 
Date Detail:
Created Date:  2002-01-15     Completed Date:  2002-06-17     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0105072     Medline TA:  Water Res     Country:  England    
Other Details:
Languages:  eng     Pagination:  4237-42     Citation Subset:  IM    
Affiliation:
Center for Multiphase Environmental Research, Department of Chemical Engineering, Washington State University, Pullman 99164-2710, USA. bmp@wsu.edu
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MeSH Terms
Descriptor/Qualifier:
Halomonas / physiology*
Hydrogen-Ion Concentration
Ion Exchange Resins
Kinetics
Nitrates / metabolism*
Osmosis
Sodium Chloride / chemistry
Waste Disposal, Fluid
Chemical
Reg. No./Substance:
0/Ion Exchange Resins; 0/Nitrates; 7647-14-5/Sodium Chloride

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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