Experimental observations on the effect of added dispersing agent on phenol biodegradation in a microporous membrane bioreactor

JOURNAL OF HAZARDOUS MATERIALS

卷:151

Article

Juang, Ruey-Shin¹  Chung, Tsuey-Ping¹  Wang, Maw-Ling²  Lee, Duu-Jong³ 

[1] Yuan Ze Univ, Dept Chem Engn & Mat Sci, Chungli 32003, Taiwan

[2] Hung Kuang Univ, Dept Environm Engn, Taichung 433, Taiwan

[3] Natl Taiwan Univ, Dept Chem Engn, Taipei 106, Taiwan

关键词: biodegradation;    phenol;    microporous membrane bioreactor;    dispersing agent;    biofilm;   

DOI  :  10.1016/j.jhazmat.2007.06.046

来源: Elsevier

【 摘 要 】

The effect of added dispersing agent tetrasodium pyrophosphate (TSP) on the degradation of phenol by Pseudomonas putida BCRC 14365 in a microporous membrane bioreactor was experimentally studied at 30 degrees C and pH 7. The hollow fibers were pre-wetted with ethanol to make them more hydrophilic. Phenol solution was passed through the lumen of the module and the cell medium was flowed across the shell. All Experiments were carried out at a fixed initial cell density of 0.023 g/L (0.06 optical density). Phenol could be completely degraded with the help of the biofilm formed on the outer surfaces of the fibers even though its level was high up to 3 g/L. It was also shown that the presence of TSP in cell medium could improve biodegradation. The amount of added TSP was optimized to be 1 g/L under the conditions studied. In this situation, 3 g/L of phenol could be completely removed within 76 h, much shorter than the absence of TSP (within 92 h). (C) 2007 Elsevier B.V. All rights reserved.

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