Biological Removal of H2S in BAS - Reactor

Document Type : Research Article


Environmental Engineering Research Center, Faculty of Chemical Engineering, Sahand University of Technology, P.O. Box 51335-1995 Tabriz, I.R. IRAN


In this research, biological removal of H2S by Thiobacillus thioparus TK-1 in BAS-reactor was studied. This is unique in that dissolved sulfide was present in the liquid influent feed as a substrate in to a continuous biofilm airlift reactor. The reactor was operated at a constant temperature of 30oC and at pH values of 7. Startup of the reactor was performed with basalt carrier material. The maximum sulfide oxidation rate achieved in mineral medium was about 6.7 mol S2-/m3.h at a hydraulic residence time of 3.3 h. Steady state conditions were not achieved at the highest loading rate, resulting in accumulation of S2- in the bioreactor. Optimal treatment performance was obtained at a loading rate of 4.8 mol/m3.h at conversion efficiency as high as 100%.


Main Subjects

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