title: COD, para-chlorophenol and toxicity removal from synthetic wastewater using rotating tubes biofilm reactor (RTBR).
abstract: Para-chlorophenol (4-chlorophenol, 4-CP) containing synthetic wastewater was treated using a rotating perforated tubes biofilm reactor (RTBR). Box-Wilson statistical experiment design and response surface methodology (RSM) were used to investigate the effects of the feed COD, 4-CP contents and the A/Q (biofilm surface/flow rate) ratio on percent COD, 4-CP and toxicity removals. Increases in A/Q ratio and the feed COD contents improved COD, 4-CP and toxicity removals. High feed 4-CP contents adversely affected the system performance due to toxic effects of 4-CP on microorganisms. High A/Q ratio and feed COD contents were required for effective 4-CP and toxicity removals at high feed 4-CP contents. More than 95% 4-CP and toxicity removals were obtained with an A/Q ratio of 186 m(2) d m(-3), and feed COD of 6000 mg L(-1) with the feed 4-CP content of 1000 mg L(-1). The RTBR was proven to be more efficient than the RBBR used for the same purpose in our previous studies.
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: D001673:Biodegradation, Environmental; D018441:Biofilms; D019149:Bioreactors / Q000382:microbiology*; D002733:Chlorophenols / Q000302:isolation & purification* / Q000633:toxicity*; D010100:Oxygen / Q000302:isolation & purification*; D012399:Rotation; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000295:instrumentation*
chemical_list: D002733:Chlorophenols; C029107:4-chlorophenol; D010100:Oxygen