Abstract
Strain Candida albicans PDY-07 was used to study the anaerobic biodegradation of phenol and m-cresol as single and dual substrates in batch cultures. The strain had a higher potential to degrade phenol than m-cresol. The cell growth kinetics of batch cultures with various initial m-cresol concentrations was investigated, and the Haldane kinetic model adequately described the dynamic behavior of cell growth on m-cresol. When cells grew on the mixture of phenol and m-cresol, substrate interactions were observed. Phenol inhibited the utilization of m-cresol; on the other hand, m-cresol also inhibited the degradation of phenol. However, the presence of low-concentration phenol enhanced m-cresol biodegradation; 100 mg/l m-cresol could be completely degraded within a shorter period of time than m-cresol alone in the presence of 150–300 mg/l phenol. The maximum m-cresol biodegradation rate was obtained at the existence of 200 mg/l phenol. Phenol was preferably utilized by the strain as a carbon and energy source. In addition, a sum kinetics model was used to describe the cell growth behavior in binary mixture of phenol and m-cresol, and the interaction parameters were determined. The model adequately predicted the growth kinetics and the interaction between the substrates.
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The authors wish to acknowledge the financial support provided by the Key National Natural Science Foundation of China (no. 20336030) and Key Natural Science Foundation of Tianjin (no. 05YFJZJC 00500).
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Wang, G., Wen, J., Li, H. et al. Biodegradation of phenol and m-cresol by Candida albicans PDY-07 under anaerobic condition. J Ind Microbiol Biotechnol 36, 809–814 (2009). https://doi.org/10.1007/s10295-009-0555-6
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DOI: https://doi.org/10.1007/s10295-009-0555-6