Abstract
Lignin peroxidase has been extensively studied due to the potential use of this enzyme in environmental pollution control. Important aspects of the production of the enzyme by the white rot fungus, Phanerochaete chrysosporium, include the improvement of yield results and cell maintenance. In the present work, Phanerochaete chrysosporium was immobilized in polyurethane foam and used for repeated-batch fermentations with various dilution of the initial medium (D), and lignin peroxidase production was investigated. The peak of 283 ± 17.5 U lignin peroxidase/l production rate was obtained at a D of 1/5, with significantly lower production rates seen at higher and lower dilution ratios. When six cycles of repeated-batch fermentation were conducted using a D of 1/5, the results revealed that at least four cycles of repeated-batch fermentation were possible with a high lignin peroxidase production rate under a cut-off value of 178 ± 3.87 U/l. Furthermore, the cell-free culture broth could be successfully concentrated to 2,800 U/l by ultrafiltration. Thus, the present study shows that optimizing the dilution of the utilized nutritional medium can improve repeated batch production of lignin peroxidase from immobilized P. chrysosporium, in terms of both cycle number and output.
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Lee, K. Use of diluted medium in repeated-batch fermentation for production of lignin peroxidase by Phanerochaete chrysosporium . World J Microbiol Biotechnol 23, 599–602 (2007). https://doi.org/10.1007/s11274-006-9264-8
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DOI: https://doi.org/10.1007/s11274-006-9264-8