title: Homogeneous sonophotolysis of food processing industry wastewater: Study of synergistic effects, mineralization and toxicity removal.
abstract: The mineralization of industrial wastewater coming from food industry using an emerging homogeneous sonophotolytic oxidation process was evaluated as an alternative to or a rapid pretreatment step for conventional anaerobic digestion with the aim of considerably reducing the total treatment time. At the selected operation conditions ([H(2)O(2)]=11,750ppm, pH=8, amplitude=50%, pulse length (cycles)=1), 60% of TOC is removed after 60min and 98% after 180min when treating an industrial effluent with 2114ppm of total organic carbon (TOC). This process removed completely the toxicity generated during storing or due to intermediate compounds. An important synergistic effect between sonolysis and photolysis (H(2)O(2)/UV) was observed. Thus the sonophotolysis (ultrasound/H(2)O(2)/UV) technique significantly increases TOC removal when compared with each individual process. Finally, a preliminary economical analysis confirms that the sono-photolysis with H(2)O(2) and pretreated water is a profitable system when compared with the same process without using ultrasound waves and with no pretreatment.
authors.affiliation: Department of Chemical Engineering, Grupo IMAES, Escuela Técnica Superior de Ingenieros Industriales, Instituto de Investigaciones Energéticas y Aplicaciones Industriales, Universidad de Castilla-La Mancha, Avda. Camilo José Cela 3, 13071 Ciudad Real, Spain. Antonio.Duran@uclm.es
authors.forename: A
authors.initials: A
authors.lastname: Durán
authors.forename: J M
authors.initials: JM
authors.lastname: Monteagudo
authors.forename: I
authors.initials: I
authors.lastname: Sanmartín
authors.forename: P
authors.initials: P
authors.lastname: Gómez
mesh_terms: D019649:Food Industry; D015386:Hazardous Substances / Q000302:isolation & purification*; D007220:Industrial Waste; D008903:Minerals / Q000737:chemistry*; D062065:Wastewater / Q000737:chemistry*
chemical_list: D015386:Hazardous Substances; D007220:Industrial Waste; D008903:Minerals; D062065:Wastewater