title: Parameters and kinetics of olive mill wastewater dephenolization by immobilized Rhodotorula glutinis cells.
abstract: Olive mill wastewater (OMW) with total phenol (TP) concentration range of 300-1200 mg/L was treated with alginate-immobilized Rhodotorula glutinis cells in batch system. The effects of pellet properties (diameter, alginate concentration and cell loading (CL)) and operational parameters (initial TP concentration, agitation rate and reusability of pellets) on dephenolization of OMW were studied. Up to 87% dephenolization was obtained after 120 h biodegradations. The utilization number of pellets increased with the addition of calcium ions into the biodegradation medium. The overall effectiveness factors calculated for different conditions showed that diffusional limitations arising from pellet size and pellet composition could be neglected. Mass transfer limitations appeared to be more effective at high substrate concentrations and low agitation rates. The parameters of logistic model for growth kinetics of R. glutinis in OMW were estimated at different initial phenol concentrations of OMW by curve-fitting of experimental data with the model.
authors.affiliation: a Department of Chemical Engineering, Faculty of Engineering , Ankara University , Tandoğan , Ankara 06100 , Turkey.
authors.forename: Gaye
authors.initials: G
authors.lastname: Bozkoyunlu
authors.forename: Serpil
authors.initials: S
authors.lastname: Takaç
mesh_terms: D000464:Alginates; D005525:Food-Processing Industry; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D007220:Industrial Waste; D007700:Kinetics; D031658:Olea; D019800:Phenol / Q000378:metabolism*; D012248:Rhodotorula / Q000254:growth & development / Q000378:metabolism*; D014865:Waste Disposal, Fluid / Q000379:methods; D062065:Wastewater; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D000464:Alginates; D020723:Glucuronic Acid; D006603:Hexuronic Acids; D007220:Industrial Waste; D019800:Phenol; D062065:Wastewater; D014874:Water Pollutants, Chemical
keywords: Rhodotorula glutinis; biodegradation; dephenolization; growth kinetics; olive mill wastewater