Combining photo-Fenton process with biological sequencing batch reactor for 2,4-dichlorophenol degradation.
The effect of the photo-Fenton process on biodegradability enhancement of 100 mg x L(-1) aqueous 2,4-dichlorophenol (2,4-DCP) solution has been investigated. An initial concentration of 65 mg x L(-1) H2O2 and 10 mg x L(-1) Fe (II) during 35 minutes of irradiation time was sufficient for total 2,4-DCP removal. At these working conditions, biodegradability, measured as BODS/COD ratio, was increased from 0 for the original solution up to 0.15. Biological oxidation of photo-Fenton pre-treated solutions was performed in a sequencing batch reactor (SBR). After 32 days of start-up, the reactor was fed with different pre-treated solutions and cycle duration was reduced progressively. TOC removal efficiencies in the SBR went from 30 up to 70%.
Al Momani
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F
Departament d'Enginyeria Química i Metallúrgia, Universitat de Barcelona, Martí i Franquès 1, 08028 Barcelona, Spain. fares@photon.qui.ub.es
Gonzalez
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O
Sans
C
C
Esplugas
S
S
D000871:Anthelmintics / Q000737:chemistry* / Q000302:isolation & purification*; D001673:Biodegradation, Environmental; D019149:Bioreactors; D002733:Chlorophenols / Q000737:chemistry* / Q000302:isolation & purification*; D006861:Hydrogen Peroxide / Q000737:chemistry; D007501:Iron / Q000737:chemistry; D016877:Oxidants / Q000737:chemistry; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid / Q000379:methods*; D014873:Water Pollutants / Q000302:isolation & purification; D018508:Water Purification / Q000379:methods*
D000871:Anthelmintics; D002733:Chlorophenols; C045076:Fenton's reagent; D016877:Oxidants; D014873:Water Pollutants; D006861:Hydrogen Peroxide; D007501:Iron; C004762:2,4-dichlorophenol