Optimization Studies on Biological Desulfurization of Sulfide Ore Using Response Surface Methodology

This research aimed to optimize the experimental conditions of biodesulfurization sulfide ore and evaluate flame-retardant effect after desulfurization under optimal conditions. Six factors were determined: particle size sample, ambient temperature, rotary speed shaking table, volume bacteria liquid, concentration leaching aid (Tween80), pH value acidizing sample. Desulfurization efficiency was used as main characterization index in optimization studies. Particle liquid inoculated selected significant by a Plackett–Burman experiment. Modeling, optimization, analysis interactive effects these factors, notably between performed using Box–Behnken design with response surface methodology. The optimum operating found be: 120 140 mesh, 175 rpm, 111 mL. Under conditions, rise 8.1% seen 5-day average efficiency. oxidation weight gain rate desulfurized 2.73%, while that control group 4.78%. results show that, optimized desulfurization, oxidizability spontaneous combustion tendency are reduced.