Thiocyanate Oxidation by Coculture from a Coke Wastewater Treatment Plant

DOI: 10.4236/jbnb.2013.42A005   PDF   HTML   XML   4,548 Downloads   6,441 Views   Citations


Bacterial strains in an activated sludge aerobic reactor from a coke wastewater were found to be able to utilize thiocyanate as carbon source when the thiocyanate-containing wastewater was deprived of carbon source. This study showed that three thiocyanate-oxidizing bacterial strains, Burkholderia sp., Chryseobacterium sp., and Ralstonia sp. were isolated from the activated sludge of a coke wastewater treatment plant as evidenced by the fact that complete decomposition of thiocyanate was achieved either by coculture or individual pure culture. The thiocyanate biodegradation by the coculture occurred with an optimal pH range between 6.5 and 8.5 and an optimal temperature range between 30°C and 40°C. The biodegradation kinetics of thiocyanate was well fitted with the Andrew-Haldane model, which demonstrated a distinct substrate concentration-inhibited bacterial growth pattern. The effects of different types of additional carbon, nitrogen or sulfur sources on thiocyanate biodegradation were also investigated. Analysis of the end-products indicated that thiocyanate degradation by these strains should proceed via two pathways.

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H. Huang, C. Feng, X. Pan, H. Wu, Y. Ren, C. Wu and C. Wei, "Thiocyanate Oxidation by Coculture from a Coke Wastewater Treatment Plant," Journal of Biomaterials and Nanobiotechnology, Vol. 4 No. 2A, 2013, pp. 37-46. doi: 10.4236/jbnb.2013.42A005.

Conflicts of Interest

The authors declare no conflicts of interest.


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