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Issue
Korean Journal of Chemical Engineering,
Vol.30, No.10, 1911-1917, 2013
Evaluation of industrial organic waste as an alternative external carbon source for denitrification in the biological nutrient removal process
Lee S, Moon T, Park S, Choi M, Kim C
The mixed liquor of organic wastes (MLOW) produced from a 1,4-butanediol production process was tested as an external carbon source for denitrification in the biological nutrient removal (BNR) process. The fraction of non-biodegradable chemical oxygen demand (NBDCOD) in the MLOW was estimated to be approximately 0.2% by measuring the oxygen uptake rate (OUR). The specific denitrification rate (SDNR) of MLOW and methanol from a nitrate utilization rate (NUR) test was confirmed to be approximately 13.02 and 12.68 mgN/gVSS/hr, respectively. The results indicated that the denitrification capability of microorganisms applying the MLOW was similar to that of using methanol as an external carbon source for the BNR process. The feasibility of MLOW for a stainless steel wastewater treatment plant (WWTP) was investigated. The low concentration of effluent nitrogen indicated a denitrification capability for MLOW similar to that for methanol. These results support the potential of MLOW as a substitute for methanol in the BNR process.
Keywords: Organic Waste; 1,4-Butanediol; Denitrification; External Carbon Source; Wastewater Treatment Plant
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