Microbial activity in the schwertmannite formed in a mine-water treatment plant
In a pilot plant at the open pit Nochten (Lusatia, East Germany) acid-, iron-and sulfate rich mine waters are treated biotechnologically. The immobilization of iron is caused by microbial iron oxidation with the subsequent precipitation of the iron ( III) -oxyhydroxysulfate schwertmannite. To determine, if a recirculation of schwertmannite sludge can stabilize and optimize the oxidation process the cell number, activity and diversity of the bacterial community in fresh and aging schwertmannite was analyzed. In schwertmannite on carrier material the total cell number showed only a slight decrease with increasing depth of the mineral layer. The rate of living cells, as determined with a LIVE/DEAD Kit, decreased significantly with an increasing depth of schwertmannite layer. The microbial community, which was investigated using FISH and T-RFLP, independent of the depth of mineral layer was dominated by iron oxidizing bacteria belonging to Ferrovum myxofaciens or to Gallionella relatives. The number of active cells in aging schwertmannites was almost constant over several weeks.
iron oxidation mine water live/dead-stain microbial community Ferrovum
Judith Kipry Claudia Wiacek Michael Schlomann
TU Bergakademie Freiberg, Institute for Biosciences,Leipziger StraBe 29, 09599, Freiberg, Germany
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
499-501
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）