Perron N, Welander U
Department of Biotechnology, Center for Chemistry and Chemical Engineering, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden.
Chemosphere. 2004 Apr;55(1):45-50. doi: 10.1016/j.chemosphere.2003.10.037.
Degradation of phenol and o-, m- and p-cresol at a concentration of 150 mg l(-1) of each compound was studied in a suspended-carrier biofilm process consisting of two aerobic stages. The fungus Mortierella sarnyensis Mil'ko dominated the microflora in the first reactor, while bacteria dominated in the second reactor. The process was studied at 4, 7, 11 and 15 degrees C. The results from the experiments showed the process to be relatively efficient even at 4 degrees C. The degradation rate was 33% of that at 15 degrees C for o-cresol. Both phenol and the cresols were degraded in the first reactor and a new peak appeared in the HPLC-chromatograms indicating the formation of one or more intermediate compounds in the first stage. These compounds were however degraded to below the detection limit in the second reactor. Small new peaks appeared in the chromatograms of the outlet from the second reactor at the maximum loading rates.
在由两个好氧阶段组成的悬浮载体生物膜工艺中，研究了浓度为150 mg l(-1)的苯酚、邻甲酚、间甲酚和对甲酚的降解情况。在第一个反应器中，真菌桑尼木霉（Mortierella sarnyensis Mil'ko）在微生物群落中占主导地位，而在第二个反应器中细菌占主导地位。该工艺在4、7、11和15摄氏度下进行研究。实验结果表明，即使在4摄氏度时该工艺也相对高效。邻甲酚的降解速率为15摄氏度时的33%。苯酚和甲酚均在第一个反应器中被降解，并且在高效液相色谱图中出现了一个新峰，表明在第一阶段形成了一种或多种中间化合物。然而，这些化合物在第二个反应器中被降解至检测限以下。在最大负荷率下，第二个反应器出口的色谱图中出现了小的新峰。
