BIOLOGICAL SULFIDE OXIDATION IN A FLUIDIZED BED REACTOR

摘要

Feasibility of a laboratory scale fluidized bed process for biological sulfide oxidation to elemental sulfur and the formation of well-settleable sulfur sludge is demonstrated. Sulfide oxidation strongly depends upon oxygen concentration, sulfide loading rate and upflow velocity. At reactor dissolved oxygen concentrations (DO_r) higher than 0.1 mg l~-1, sulfate was the main product of sulfide oxidation. Upon increasing the sulfide loading rate, the sulfate production rate decreased as sulfide oxidation to sulfur showed marked increase.