Abstract
A combined solvent extraction and biphasic biodegradation process was proposed to remove organic pollutants from highly saline solutions, where the organic solvent is biocompatible and the organic-aqueous interface remains quasi-quiescent during the process. Phenol and Pseudomonas putida BCRC 14365 were selected as the model organic compound and biomass, respectively. The effects of added NaCl concentration (50-200. g/L) and pH (1.0-9.0) in synthetic solutions on phenol removal and cell growth were studied at 30°C. The initial cell concentration was fixed at 0.025. g/L. Within the examined range, the adjustment of solution pH to 3.0 resulted in the best removal performance of 1100. mg/L phenol from such saline solutions (an apparent removal rate of about 20. mg/(L. h)) when using kerosene as the organic solvent. The overall process appeared to be favored when the salt concentration in saline solution was in the range of 100-150. g/L. The application potentials of such a triphasic process for the removal of toxic organics (phenol) from highly saline and acidic wastewaters were finally demonstrated in fed-batch mode.
Original language | English |
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Pages (from-to) | 706-712 |
Number of pages | 7 |
Journal | Journal of Hazardous Materials |
Volume | 178 |
Issue number | 1-3 |
DOIs | |
State | Published - 06 2010 |
Externally published | Yes |
Keywords
- Biphasic biodegradation
- Organic pollutants
- Phenol
- Saline solutions
- Solvent extraction
- Triphasic system