耐塩性鉄酸化細菌の馴養による電気メッキ排水処理の検討 Electroplating Wastewater Treatment using Halotolerant Iron-oxidizing Bacteria Acclimated to Seawater
The iron-oxidizing bacterium, <i>Thiobacillus ferrooxidans</i>, is not halotolerant and cannot oxidize ferrous ions (Fe<sup>2+</sup>) to ferric ions (Fe<sup>3+</sup>) in electroplating wastewater containing high concentrations of chlorine ions. <i>T. ferrooxidans</i> cannot be used for the treatment of such electroplating wastewater. The acclimation of iron-oxidizing halotolerant bacteria has been studied to treat electroplating wastewater containing ferrous ions and a high concentration of chlorine ions. Iron-oxidizing bacteria that are halotolerant and able to oxidize Fe<sup>2+</sup> to Fe<sup>3+</sup> were obtained from the activated sludge of a steel works coke-oven wastewater treatment plant. A long-term experiment using artificial wastewater containing 20,000 mg · <I>l</I><sup>-1</sup> chlorine ions showed the stable performance of the Fe<sup>2+</sup> oxidation ability by iron-oxidizing bacteria acclimated to seawater. It seems that the acclimated iron-oxidizing bacteria can be used for the treatment of electroplating wastewater. An analysis of genomic DNA extracted from the acclimated sludge of the reactor showed the existence of an analog of the iron-oxidizing bacterium, <i>Thiobacillus prosperus</i>.
- 水環境学会誌 = Journal of Japan Society on Water Environment
水環境学会誌 = Journal of Japan Society on Water Environment 30(3), 155-159, 2007-03-10
Japan Society on Water Environment