Integrated treatment of olive mill wastewater (OMW) by the combination of Fenton's reaction and anaerobic treatment.

The use of an integrated treatment scheme consisting of wet hydrogen peroxide catalytic oxidation (WHPCO) followed by two-stage upflow anaerobic sludge blanket (UASB) reactor (10l each) for the treatment of olive mill wastewater was the subject of this study. The diluted wastewater (1:1) was pre-treated using Fenton's reaction. Optimum operating conditions namely, pH, H(2)O(2) dose, Fe(+2), COD:H(2)O(2) ratio and Fe(+2):H(2)O(2) ratio were determined. The UASB reactor was fed continuously with the pre-treated wastewater. The hydraulic retention time was kept constant at 48h (24h for each stage). The conventional parameters such as COD, BOD, TOC, TKN, TP, TSS, oil and grease, and total phenols were determined. The concentrations of polyphenolic compounds in raw wastewater and effluents of each treatment step were measured using HPLC. The results indicated a good quality final effluent. Residual concentrations of individual organic compounds ranged from 0.432 mg l(-1) for rho-hydroxy-benzaldhyde to 3.273 mg l(-1) for cinnamic acid.

[1]  Francisco Cabrera,et al.  Land treatment of olive oil mill wastewater , 1996 .

[2]  M. Badawy,et al.  Fenton's peroxidation and coagulation processes for the treatment of combined industrial and domestic wastewater. , 2006, Journal of hazardous materials.

[3]  S. Lo,et al.  Oxidation of aqueous chlorobiphenyls with photo-fenton process , 1999 .

[4]  P. Cañizares,et al.  Advanced oxidation processes for the treatment of olive-oil mills wastewater. , 2007, Chemosphere.

[5]  Andrew D. Wheatley,et al.  Anaerobic digestion : a waste treatment technology , 1990 .

[6]  Nicolas Kalogerakis,et al.  Treatment of olive mill effluents Part I. Organic matter degradation by chemical and biological processes--an overview. , 2005, Environment international.

[7]  Sami Sayadi,et al.  Treatment of olive oil mill wastewater by combined process electro-Fenton reaction and anaerobic digestion. , 2006, Water research.

[8]  J. Beltrán-Heredia,et al.  Aerobic degradation of olive mill wastewaters , 1997, Applied Microbiology and Biotechnology.

[9]  M. Hamdi.  Toxicity and biodegradability of olive mill wastewaters in batch anaerobic digestion , 1992 .

[10]  Alfons Vogelpohl,et al.  Landfill leachate treatment by a photoassisted fenton reaction , 1997 .

[11]  R. Borja,et al.  Anaerobic digestion of black-olive wastewater , 1993 .

[12]  F. Vahabzadeh,et al.  Application of the central composite design and response surface methodology to the advanced treatment of olive oil processing wastewater using Fenton's peroxidation. , 2005, Journal of hazardous materials.

[13]  Ayoob Torkian,et al.  The effect of organic loading rate on the performance of UASB reactor treating slaughterhouse effluent , 2003 .

[14]  C. Banks,et al.  Influence of different aerobic pretreatments on the kinetics of anaerobic digestion of olive mill wastewater , 1995 .

[15]  Isam Sabbah,et al.  The effect of pretreatment on anaerobic activity of olive mill wastewater using batch and continuous systems , 2004 .

[16]  L. Ersoy,et al.  Characterization and lime treatment of olive mill wastewater. , 2001, Water research.

[17]  A. D. Moreno,et al.  Characterisation and conditioning of Fenton sludges issued from wastewater treatment. , 2002 .

[18]  Craig D. Adams,et al.  Effects of Ozonation on the Biodegradability of Substituted Phenols , 1997 .

[19]  P. He,et al.  Catalytic reduction of chlorinated and recalcitrant compounds in contaminated water. , 2005, Journal of hazardous materials.

[20]  M. Suidan,et al.  Oxidation kinetics and effect of pH on the degradation of MTBE with Fenton reagent. , 2005, Water research.

[21]  C. Pulgarin,et al.  Photochemical-biological treatment of a real industrial biorecalcitrant wastewater containing 5-amino-6-methyl-2-benzimidazolone. , 2001, Water science and technology : a journal of the International Association on Water Pollution Research.

[22]  Montaser Y. Ghaly,et al.  Advanced oxidation processes for the removal of organophosphorus pesticides from wastewater , 2006 .

[23]  F. Sannino,et al.  Reusing ethyl acetate and aqueous exhausted fractions of dry olive mill residue by saprobe fungi. , 2007, Chemosphere.

[24]  Marshall K. Davis,et al.  Oxidation of MTBE by ozone and peroxone processes , 1999 .

[25]  R. R. Dague,et al.  Effects of temperature and hydraulic retention time on anaerobic sequencing batch reactor treatment of low-strength wastewater , 1997 .

[26]  K. Lasaridi,et al.  Combined bioremediation and advanced oxidation of green table olive processing wastewater , 2005 .

[27]  R. Amarowicz,et al.  Phenolic acids in caryopses of two cultivars of wheat, rye and triticale that display different resistance to pre-harvest sprouting , 1999 .