Heterotrophic nitrification-aerobic denitrification potential of cyanide and thiocyanate degrading microbial communities under cyanogenic conditionsopen access
- Authors
- Mekuto, Lukhanyo; Kim, Young Mo; Ntwampe, Seteno K. O.; Mewa-Ngongang, Maxwell; Mudumbi, John Baptist N.; Dlangamandla, Nkosikho; Itoba-Tombo, Elie Fereche; Akinpelu, E. A.
- Issue Date
- Jun-2019
- Publisher
- KOREAN SOC ENVIRONMENTAL ENGINEERS
- Keywords
- Aerobic denitrification; Cyanide degraders; Free cyanide; Nitrification; Thiocyanate; Thiocyanate degrader
- Citation
- ENVIRONMENTAL ENGINEERING RESEARCH, v.24, no.2, pp.254 - 262
- Indexed
- SCIE
SCOPUS
KCI
- Journal Title
- ENVIRONMENTAL ENGINEERING RESEARCH
- Volume
- 24
- Number
- 2
- Start Page
- 254
- End Page
- 262
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/13415
- DOI
- 10.4491/eer.2018.147
- ISSN
- 1226-1025
- Abstract
- 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-1.h(-1), except when CN- and SCN- loading was 15 mg CN-/L and 50 mg SCN-.L-1, respectively, which slightly inhibited nitrification. The TDO's were able to achieve a nitrification rate of 1.59 mg NH4+-N.L-1.h(-1) 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-1.h(-1). 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-1.h(-1), 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-1.h(-1) and 0.22 mg NO3--N.L-1.h(-1) when CN- concentration was 10 and 15 mg CN-.L-1, 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-1.h(-1) and 0.63 mg NO3--N.L-1.h(-1) irrespective of CN- and SCN- concentrations.
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