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논문 기본 정보

자료유형
학술저널
저자정보
Lukhanyo Mekuto (Cape Peninsula University of Technology) Young Mo Kim (Gwangju Institute of Science and Technology) Seteno K. O. Ntwampe (Cape Peninsula University of Technology) Maxwell Mewa-Ngongang (Cape Peninsula University of Technology) John Baptist N. Mudumbi (Cape Peninsula University of Technology) Nkosikho Dlangamandla (Cape Peninsula University of Technology) Elie Fereche Itoba-Tombo (Cape Peninsula University of Technology) E. A. Akinpelu (Cape Peninsula University of Technology)
저널정보
대한환경공학회 Environmental Engineering Research Environmental Engineering Research 제24권 제2호
발행연도
2019.6
수록면
254 - 262 (9page)

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초록· 키워드

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The impact of free cyanide (CN⁻) and thiocyanate (SCN⁻) on the CN⁻ (CDO) and SCN⁻ degraders (TDO) to nitrify and denitrify aerobically was evaluated under alkaline conditions. The CDO’s were able to nitrify under cyanogenic conditions, achieving NH₄⁺-N removal rates above 1.66 mg NH₄⁺-N.L<SUP>-1</SUP>.h<SUP>-1</SUP>, except when CN⁻ and SCN⁻ loading was 15 mg CN⁻/L and 50 mg SCN⁻.L<SUP>-1</SUP>, respectively, which slightly inhibited nitrification. The TDO’s were able to achieve a nitrification rate of 1.59 mg NH₄⁺-N.L<SUP>-1</SUP>.h<SUP>-1</SUP> in the absence of both CN⁻ and SCN⁻, while the presence of CN⁻ and SCN⁻ was inhibitory, with a nitrification rates of 1.14 mg NH₄⁺-N.L<SUP>-1</SUP>.h<SUP>-1</SUP>. The CDO’s and TDO’s were able to denitrify aerobically, with the CDO’s obtaining NO₃⁻-N removal rates above 0.67 mg NO₃⁻-N.L<SUP>-1</SUP>.h<SUP>-1</SUP>, irrespective of the tested CN⁻ and SCN⁻ concentration range. Denitrification by the TDO’s was inhibited by CN⁻, achieving a removal rate of 0.46 mg NO₃⁻-N.L<SUP>-1</SUP>.h<SUP>-1</SUP> and 0.22 mg NO₃⁻-N.L<SUP>-1</SUP>.h<SUP>-1</SUP> when CNconcentration was 10 and 15 mg CN⁻.L<SUP>-1</SUP>, respectively. However, when the CDO’s and TDO’s were co-cultured, the nitrification and aerobic denitrification removal rates were 1.78 mg NH₄⁺-N.L<SUP>-1</SUP>.h<SUP>-1</SUP> and 0.63 mg NO₃⁻-N.L<SUP>-1</SUP>.h<SUP>-1</SUP> irrespective of CN⁻ and SCN⁻ concentrations.

목차

ABSTRACT
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2019-539-000342702