EFFECT OF VARIOUS SOURCES OF ORGANIC-CARBON AND HIGH NITRITE AND NITRATE CONCENTRATIONS ON THE SELECTION OF DENITRIFYING BACTERIA .2. CONTINUOUS CULTURES IN PACKED-BED REACTORS

Google Scholar
  • 1 January 1983
    • journal article
    • research article
    • Vol. 32  (1) , 65-71
Abstract
The effect of different organic compounds, nitrites and nitrates at the concentration of 1000 mg N/l, on the quantitative and strain-specific selection of denitrifying bacteria was determined in anaerobic packed bed reactors. Both the C source and N form influenced strain specificity and the frequency of occurrence of denitrifying bacteria, which ranged from 11% (glucose and nitrates) to 100% (methanol and ethanol with nitrates). A single species selection was observed in the presence of nitrites within the packed bed reactor: Pseudomonas aeruginosa in medium with acetate, P. stutzeri in medium with ethanol, P. mendocina in medium with methanol and P. fluorescens in medium with glucose. When nitrates were present in the packed bed reactor, the dominating bacteria were: P. stutzeri in medium with acetate, P. fluorescens in medium with ethanol, Paracoccus denitrificans in medium with methanol and Alcaligenes faecalis in medium with glucose.