-7 A Novel Acinetobacter sp. IBN-H7 for Decomposing TMAH and Method for Waste-water Treatment using the Strain

摘要

PURPOSE: Novel acinetobacter sp. IBN-H7 (KCTC 0836BP) for decomposing trimethyl ammonium hydroxide (TMAH), which is useful for treating wastewater from etching process of silicon surface in semiconductor manufacturing facilities. CONSTITUTION: The acinetobacter sp. IBN-H7 (KCTC 0836BP) is shake-cultured in a culture medium containing (NH4)2SO4 3g/L, trace elements such as H3BO3 0.3g, CoSO 47H2O 0.2g, ZnSO4H2O 0.1g, MnCl2H2O 0.03g, NaMoO4H2O 0.03g, NiCl2H2O 0.02g, CuSO4H2O 0.01g, FeSO4H2O 20g, CaCl2H2O 10g/L, MgSO47H2O(40%) 2mL/L, 1M phosphate buffer solution (pH 7), 1% TMAH acting as a carbon source at 30C for 72hrs. Triple test (BOD) of the obtained culture solution show a BOD removal ratio higher than 90%. To culture the acinetobacter sp. IBN-H7 (KCTC 0836BP), such methods as batch culture, fed-batch culture, and continuous culture are preferably used. In the wastewater treatment method, one strain selected from kluvyeromyces delphinesis IBN-H1(KCTC 0834BP) or bacillus cereus IBN-H4(KCTC 0835BP) is added.