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THE EFFECT OF OXYGEN ON PERCHLORATE REDUCTION IN A BIOFILM REACTOR
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  • Journal title : Environmental Engineering Research
  • Volume 12, Issue 4,  2007, pp.148-154
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2007.12.4.148
 Title & Authors
THE EFFECT OF OXYGEN ON PERCHLORATE REDUCTION IN A BIOFILM REACTOR
Choi, Hyeok-Sun;
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 Abstract
The purpose of this research was to investigate the effects of low concentration of oxygen on reduction of perchlorate, especially low perchlorate influent concentrations in a biofilm reactor, as well as the effect of flow pattern in a biofilm reactor. Dissolved oxygen averaging 1 mg/L did not inhibit reduction of influent perchlorate from 23 to in the biofilm reactors when sufficient acetate was added, probably due to limitation of oxygen diffusion into the biofilm. Influent perchlorate ranging from 23 to was reduced to below detection level () in the presence of 1 mg/L dissolved oxygen (DO). Chloride was produced in a ratio of and in plug flow and recirculation biofilm reactor which is similar to stoichiometric amount () indicating complete perchlorate reduction at of feeding. At L influent perchlorate, total biomass solids were 3.18 g and 2.81 g in the plug flow and recirculation biofilm reactors. The most probable number(MPN) analysis for perchlorate-reducing bacteria showed to in both biofilm reactors throughout the experiments. The effluent perchlorate concentrations were not significantly different in the two different flow regimes, plug flow and recirculation biofilm reactors.
 Keywords
Biofilm reactor;Oxygen;Perchlorate;
 Language
English
 Cited by
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