title: Applicability of an electrochemical Fenton-type process to actual wastewater treatment.
abstract: The applicability of an electrochemical Fenton-type process (EF-HOCl-ReFe) to the treatment of three actual wastewaters, namely wastewater from an automobile factory (automobile wastewater), metal scrap-cleansing wastewater, and municipal wastewater, is discussed in this research. The EF-HOCl-ReFe successfully removed the chemical oxygen demand (COD) from automobile wastewater pre-treated by a coagulation process without any inhibition. The apparent current efficiency reached 86%, 46% of which was ascribed to the electrochemical Fenton-type mechanism. The metal scrap-cleansing wastewater had a yellow colour and high concentrations of COD (6550 mg/L) and Cl(-) (1560 mM). The EF-HOCl-ReFe could achieve almost complete COD removal and decolourization after 48 h of treatment, although a temporary intensification of colour was observed before the decolourization. The EF-HOCl-ReFe was also effective in the removal of 1,4-dioxane from municipal wastewater pre-treated by activated sludge and coagulation processes, which were unable to remove 1,4-dioxane. The 1,4-dioxane removal efficiency after 30 min of treatment reached 68.5%. Thus, the EF-HOCl-ReFe was applicable to the treatment of these actual wastewaters.
authors.affiliation: Faculty of Science and Technology, Ryukoku University, 1-5 Yokotani, Setaoe-cho, Otsu 520-2194, Japan E-mail: naoyuki@rins.ryukoku.ac.jp.
authors.forename: Naoyuki
authors.initials: N
authors.lastname: Kishimoto
authors.affiliation: Graduate School of Science and Technology, Ryukoku University, 1-5 Yokotani, Setaoe-cho, Otsu 520-2194, Japan.
authors.forename: Takuya
authors.initials: T
authors.lastname: Kitamura
authors.affiliation: Graduate School of Science and Technology, Ryukoku University, 1-5 Yokotani, Setaoe-cho, Otsu 520-2194, Japan.
authors.forename: Yu
authors.initials: Y
authors.lastname: Nakamura
mesh_terms: D057919:Biological Oxygen Demand Analysis; D055664:Electrochemical Techniques / Q000379:methods*; D006861:Hydrogen Peroxide; D010084:Oxidation-Reduction; D012722:Sewage / Q000737:chemistry; D014865:Waste Disposal, Fluid; D062065:Wastewater / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*
chemical_list: D006861:Hydrogen Peroxide; D012722:Sewage; D062065:Wastewater