Journal
KOREAN JOURNAL OF CHEMICAL ENGINEERING
Volume 30, Issue 11, Pages 2052-2058Publisher
KOREAN INSTITUTE CHEMICAL ENGINEERS
DOI: 10.1007/s11814-013-0145-1
Keywords
Cometabolic Degradation; Kissiris-immobilized Cell Bioreactor [ICB]; p-Nitrophenol (PNP); Phenol; Ralstonia eutropha
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Ralstonia eutropha was able to degrade p-nitrophenol (PNP) at concentrations ranging from 5 to 15 mg l(-1) in the presence of phenol which was kept at the constant concentration of 200 mg l(-1). More than 90% of phenol was degraded within 30 h and in the absence of PNP. While in this time period and in the presence of 15 mg l(-1) less than 30% of phenol was degraded and PNP removal ability of the test bacterium was about 20%. Kissiris as a natural source of silicon dioxide having a very rigid structure with many micropores irregularly distributed throughout its surface was used to evaluate effectiveness of the cell immobilization using a Kissiris-immobilized cell bioreactor [ICB]. By applying phenol-feeding regime in the ICB operated in a batch recycling mode, simultaneous degradation of phenol in total amount of 1,000 mg l(-1) with 15 mg l(-1) PNP was achieved within 40 h.
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