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DESTRUCTION OF HUMIC MATTERS AND AMMONIA IN THE LANDFILL LEACHATE BY SUPERCRITICAL WATER OXIDATION
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  • Journal title : Environmental Engineering Research
  • Volume 11, Issue 6,  2006, pp.311-317
  • Publisher : Korean Society of Environmental Engineering
  • DOI : 10.4491/eer.2006.11.6.311
 Title & Authors
DESTRUCTION OF HUMIC MATTERS AND AMMONIA IN THE LANDFILL LEACHATE BY SUPERCRITICAL WATER OXIDATION
Kim, Y.K.; Ahn, J.S.; Leung, W.;
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 Abstract
Feasibility of destroying synthetic and actual leachate containing humic acids and ammonia compounds by supercritical water oxidation (SCWO) was evaluated. In this study, destruction efficiencies of humic acids and ammonia respectively were investigated at various reaction temperatures and residence times under pressure a supercritical pressure (280 atm). To lower reaction temperature, chemical oxidants were used. The experiment was carried out in a cylindrical batch reactor made of Hastelloy C-276 that can withstand high temperature and pressure. Concentrations of humic acids and ammonia were measured using a method and an ammonia selective electrode, respectively. The optimal destructive condition of humic acids in the presence of stoichiometric oxygen(air) was 3 min at , but the temperature could be lowered to subcritical region () along with as an oxidant. For ammonia, the optimal destructive condition with air was 5 min at , but it was possible to operate the process for 3 minutes at or 2 min at along with as an oxidant. At 2 min and along with as an oxidant, humic and ammonia compounds in the actual leachate were easily destructed and the effluent quality met the Korea Standard Leachate Quality.
 Keywords
Humic acid;Ammonia;Leachate;Subcritical and Supercritical Water Oxidation;Oxidants;
 Language
English
 Cited by
1.
Subcritical and supercritical water gasification of humic acid as a model compound of humic substances in sewage sludge, The Journal of Supercritical Fluids, 2017, 119, 130  crossref(new windwow)
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