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Environmental Technology, Vol. 25. pp 1151-1157 © Selper Ltd, 2004 SULFUR institution BY STEADY-STATE CONTINUOUS CULTURES OF A SULFOXIDIZING CONSORTIUM AND THIOBACILLUS THIOPARUS ATCC 23645 S. ALCÁNTARA1, A. VELASCO2 AND S. REVAH3* Instituto Mexicano del Petróleo. Programa de Biotecnología del Petróleo. Eje primeval Lázaro Cárdenas 152, C.P. 07730, México D.F. 2 Centro Nacional de Investigación y Capacitación Ambiental (CENICA- INE), Edificio W-3 piso, Apdo. Postal 55-534, C.P. 09340 México, D.F. 3 Departamento de Ingeniería de Procesos e Hidráulica. Universidad Autónoma Metropolitana- Iztapalapa Apdo. Postal 55-534, C.P. 09340 México, D.F. México 1 (Received 9 December 2003; judge 16 June 2004) ABSTRACT The principal(a) mho formation by the partial oxidation of thiosulfate by twain a sulfoxidizing mob and by Thiobacillus thioparus ATCC 23645 was studied at a lower inject aerophilic conditions in chemostat. Steady kingdom was attained with basically derive conversion to sulfate when the fade out atomic number 8 parsimony was 5 mgO2 l-1 and at a lower place a dilution ordain (D) of 3.0 d-1 for the crime syndicate and 0.9 d-1 for T thioparus. The consortium organise unproblematic sulfur in besotted state downstairs type O limitation.

Fifty per centum of the theoretical elemental sulfur turn out was obtained with a change state oxygen concentration of 0.2 mgO2 l -1. Growth of T thioparus was negatively stirred with a concentration below 1.9 mgO2 l-1. Consortium yield from bundle cultures was 2.1 g-1protein mol-1thiosulfate, which was comparable with the determine obtained in the chemostat at dilution order of 0.4 d-1 and 1.2 d-1. The consortium showed a utmost degradation rate of 0.105 gthiosulfate g-1protein min-1 and a intensity level rate for S2O32- of 1.9 mM. Keywords: Sulfur, thiosulfate, sulfur-oxidizing consortium, thiobacilli. INTRODUCTION from wastewater was converted to elemental sulfur below an oxygen concentration of 1 mgO 2 l-1 [7]. Under these conditions, was nominate that the optimal...If you motivation to get a wide essay, order it on our website: Ordercustompaper.com

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