title: Treatment of phenol in synthetic saline wastewater by solvent extraction and two-phase membrane biodegradation.
abstract: Phenol in synthetic saline (100gL(-1) NaCl) and acidic (pH 3) wastewater was treated by a hybrid solvent extraction and two-phase membrane biodegradation process at 30 degrees C. Kerosene was adopted to be the organic solvent because it was biocompatible and had a suitable partition coefficient for phenol. Phenol in water was first extracted by kerosene in a batch stirred vessel and the loaded solvent was passed through the lumen of a polyvinylidene fluoride (PVDF) hollow-fiber membrane contactor; in the meantime, Pseudomonas putida BCRC 14365 in mineral salt medium was flowed across the shell, to which tetrasodium phyophosphate (1gL(-1)) was added as a dispersing agent. The effect of the initial phenol level in wastewater (110-2400mgL(-1)) on phenol removal and cell growth was experimentally studied. At a cell concentration of 0.023gL(-1), it was shown that the removal of phenol from saline wastewater was more efficient at a level of 2000mgL(-1) when 0.02-m(2) membrane module was used. The effects of bigger membrane module size (0.19m(2) area) and higher initial cell concentration (0.092-0.23gL(-1)) on the performance of such a hybrid process for the treatment of higher-level phenol in saline wastewater was also evaluated and discussed.
authors.affiliation: Department of Chemical Engineering and Materials Science, Yuan Ze University, 135 Yuan-Tung Road, Chung-Li 32003, Taiwan. rsjuang@ce.yzu.edu.tw
authors.forename: Ruey-Shin
authors.initials: RS
authors.lastname: Juang
authors.forename: Wen-Ching
authors.initials: WC
authors.lastname: Huang
authors.forename: Ya-Han
authors.initials: YH
authors.lastname: Hsu
mesh_terms: D001673:Biodegradation, Environmental; D019149:Bioreactors; D006863:Hydrogen-Ion Concentration; D019800:Phenol / Q000737:chemistry*; D012965:Sodium Chloride / Q000737:chemistry*; D012997:Solvents / Q000737:chemistry; D013696:Temperature; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D012997:Solvents; D014874:Water Pollutants, Chemical; D019800:Phenol; D012965:Sodium Chloride