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Issue
Korean Journal of Chemical Engineering,
Vol.25, No.4, 787-792, 2008
Bio-denitrification of the nitrate waste solution from the lagoon sludge in a continuous bio-reduction process
Lee OM, Oh JH, Libert M, Hwang DS, Choi YD, Park JH, Chung US, Jo BR, Kim MJ, Lee SJ
The treatment of lagoon sludge is a serious task during the decommissioning of a uranium conversion plant. The main component of the sludge is ammonium nitrate, which is a very explosive material. Therefore, biological removal of the ammonium nitrate would be an attractive process. In this work, the bio-denitrification of the nitrate solution from lagoon sludge with a continuous fermentation process was studied. The optimal conditions for removal of nitrate by Pseudomonas halodenitrificans in the continuous bio-reduction process were a C/N ratio and pH of 3.1 and 7.5, respectively, with CO2 gas control, and five times the microelements as used in a batch culture, at 30 oC. It was concluded that bio-denitrification could be applicable to lagoon sludge waste, but with some limitations.
Keywords: Nitrate; Denitrification; Pseudomonas halodenitrificans; Continuous Culture
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[Cited By]
  1. Pradhan D, Ahn JG, Kim DJ, Lee SW, Korean Journal of Chemical Engineering, 26(3), 736, 2009
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