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Kinetic study of shortcut denitrification with a mixture of pyridine and phenol as carbon source |
MI Jing, YUE Xiu-ping, ZHANG Xiao-mei, LIU Ji-ming, BO Hong-miao |
College of Environmental Science and Engineering, Taiyuan University of Technology, Taiyuan 030024, China |
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Abstract Biodegradation of pyridine and phenol was carried out in batch-scale experiment. The kinetics of short-cut denitrification process was studied using a mixture of pyridine and phenol as electron donor and NO2--N as electron acceptor. Experimental results showed that pyridine degradation was inhibited in the presence of phenol. Further investigation revealed that the pyridine degradation, no matter whether co-metabolized with phenol, fitted the zero-order kinetics model. However, the COD and NO2--N concentrations fitted the double-substrate Monod model, with the predicted and measured values showed a good correlation. The maximum specific degradation rate was 0.0067mg NO2--N/(mg MLVSS·h), and the half saturation coefficient for organic substance and nitrite nitrogen were 76.35 mg/L and 0.66 mg/L, respectively.
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Received: 08 August 2015
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