title: Biological treatment of para-chlorophenol containing synthetic wastewater using rotating brush biofilm reactor.
abstract: A novel rotating brush biofilm reactor (RBBR) was used for para-chlorophenol (4-chlorophenol, 4-CP), COD and toxicity removal from synthetic wastewater containing different concentrations of 4-CP. Effects of major operating variables such as the feed 4-CP and COD concentrations and A/Q (biofilm surface area/feed flow rate) ratio on the performance of the biofilm reactor were investigated. A Box-Wilson statistical experiment design method was used by considering the feed 4-CP (0-1000 mg l(-1)), COD (2000-6000 mg l(-1)) and A/Q ratio (73-293 m(2) day m(-3)) as the independent variables while the 4-CP, COD and toxicity removals were the objective functions. The results were correlated by a response function and the coefficients were determined by regression analysis. Percent 4-CP, COD and toxicity removals determined from the response functions were in good agreement with the experimental results. 4-CP, COD and toxicity removals increased with decreasing feed 4-CP and increasing A/Q ratio. Optimum conditions resulting in maximum COD, 4-CP and toxicity removals were found to be A/Q ratio of nearly 180 m(2) day m(-3), feed COD of nearly 4000 mg l(-1) and feed 4-CP of less than 205 mg l(-1).
authors.affiliation: Department of Environmental Engineering, Dokuz Eylul University, Buca, Izmir, Turkey.
authors.forename: Serkan
authors.initials: S
authors.lastname: Eker
authors.forename: Fikret
authors.initials: F
authors.lastname: Kargi
mesh_terms: D018441:Biofilms; D019149:Bioreactors; D002733:Chlorophenols / Q000737:chemistry / Q000378:metabolism*; D010100:Oxygen / Q000737:chemistry / Q000378:metabolism; D014865:Waste Disposal, Fluid; D014874:Water Pollutants, Chemical / Q000378:metabolism*
chemical_list: D002733:Chlorophenols; D014874:Water Pollutants, Chemical; C029107:4-chlorophenol; D010100:Oxygen