Influence of temperature in sulphate-reducing anaerobic bacteria (SRB) development and metal removal efficiency

摘要

Treatment processes to remove metals and sulphate, neutralizing the acidity of acidic mining drainage (AMD) involve phenomena as sulphate-reducing anaerobic bacteria (SRB) development and biosorption. Processes have found widely varying efficiencies ranging from 40 and 90 %. We carry out a test plan to determine the effect of temperature: 6 °C, 13°C and 25 °C. At 25 °Cthe black precipitate formation begins during the first hours reaching a metal removal efficiency of 90.44%, while at6 °Cin general there was no evidence of SRB development, even at 30 days of incubation, without significant changes in pH and Eh.