Method for Heavy Metal Bioleaching Using Sulfur-Oxidizing Bacteria

摘要

The invention activated sludge arising from wastewater treatment plants, and anaerobic-aerobic digested sludge, the sludge is deposited in the river and lake, heavy metals contaminated soils, ash sulfated bacterial thio contamination of waste containing heavy metals, such as Bacillus thio oxy thiooxidans M. ET (Thiobacillus using thiooxidans MET) KCTC 8928P relates to a method of eluting a heavy metal in a biological.; The present invention, in the heavy metal removal in the anaerobic-aerobic digested sludge and activated sludge, the inoculated anaerobic, aerobic sulfated bacterium thio Bacillus thio oxy thiooxidans M. ET strain digested sludge or activated sludge containing an insoluble heavy metals, and then the when the strain is added and mixed with the energy source of the sulfur-free sulfated bacteria in the inoculated sludge or activated sludge and incubated with a feed of air, and the strains that the pH of the culture sludge or activated sludge is in the 1.5 to 2.5 range the said and dehydrating the sludge or activated sludge, the dehydrated sludge is solid waste liquid treated by limestone neutralization and to separate consists of a step of precipitation by neutralization.; It becomes possible to remove a considerable amount of heavy metals contained in the waste, a few months the activity of the bacteria to do work continuously does not decrease while, it is possible to maintain a high removal efficiency of heavy metals.