The invention discloses a chemical-electrochemical-biological three-section combined
wastewater treatment device and a treatment method for steel
passivation solution
wastewater by adopting the chemical-electrochemical-biological three-section combined
wastewater treatment device, the device comprises a chemical
phosphorus removal reactor, a filter type
cathode electro-Fenton reactor and an MBR tank, the chemical
phosphorus removal reactor consists of a
reaction zone and a
precipitation zone, the filtering type
cathode electro-Fenton reactor comprises a filtering type
cathode, an
anode, a first
aeration system and the like, and the MBR tank comprises a membrane component, a second
aeration system and the like. The filtering type cathode electro-Fenton reactor can effectively utilize residual Fe<2+> in a chemical
phosphorus removal section, the filtering type cathode can achieve the purpose of
solid-liquid separation, and meanwhile, iron substances intercepted on the surface of an
electrode can still continue to be subjected to an interface
Fenton reaction; through organic combination of chemical phosphorus removal, filtering type cathode electro-Fenton and MBR technologies, high-efficiency removal of
refractory organics and phosphates in
passivation solution wastewater can be realized, and the method has the advantages of small dosage of chemicals, low operation cost, short reaction time, high treatment efficiency and the like.