The investigation of degradation and mineralization of high concentrations of formaldehyde in an electro-Fenton process combined with the biodegradation

► The electro-Fenton process was combined with a bioprocess for the degradation of CH2O. ► The electro-Fenton completely degraded 7500 mg/L of CH2O at a reaction time of 6 min. ► The electro-Fenton was very efficient in the formaldehyde mineralization. ► The effluent of electro-Fenton was efficiently post-treated using a biological process. ► Coupling electro-Fenton and biotreatment is a promising option for the treatment of toxic compounds.