Biological treatment of gold ore cyanidation wastewater in fixed bed reactors
1997
Dictor, Marie Christine | Battaglia-Brunet, Fabienne | Morin, Dominique | Bories, Andre | Clarens, M. | Bureau de Recherches Géologiques et Minières (BRGM) | Unité expérimentale de Pech-Rouge (PECH ROUGE) ; Institut National de la Recherche Agronomique (INRA)
Correspondance: BRGM, av. Claude Guillemin, 45060 Orleans, Cedex 2, France
اظهر المزيد [+] اقل [-]International audience
اظهر المزيد [+] اقل [-]إنجليزي. The treatment of a cyanidation effluent containing thiocyanate, free cyanide, and complexed cyanide was con tinuously performed for a period of 6 months. Activated carbon, pozzolana, and a mixture of pumice stone and zeolite were tested as supports in fixed bed reactors. Activated carbon adsorbed the different forms of cyanide. In contrast, the other supports did not remove any pollutants from the effluent during an adsorption experiment. All supports successfully allowed fixation of bacteria. More than 90% of the thiocyanate was biologically decomposed into NH4 +, C02 and S042, even when increasing the feed flow-rate and the pollutant concentrations. Free and complexed cyanides were eliminated, probably through a combination of precipitation and biological degradation. The oxidation of ammonium into nitrate was only performed by the activated carbon-containing column and with the more diluted feeding. The nitrification process was inhibited in all reactors when the cyanide concentrations and feed flow-rates were increased
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
المعلومات البيبليوغرافية
تم تزويد هذا السجل من قبل Institut national de la recherche agronomique
