Process method for deeply treating tannery wastewater by using Fenton reagent oxidation method

The invention relates to a process method for deeply treating tannery wastewater by using a Fenton reagent oxidation method. The process method comprises the following steps: adding acid liquor into tannery wastewater to adjust the pH value, and adding a FeSO4 solution; slowly adding a H2O2 solution, wherein the molar ratio of Fe to H2O2 is 1:(2-1.4); controlling the reaction time and reaction temperature; aerating and stirring to fully react wastewater; feeding the wastewater into a coagulating sedimentation basin for settling; discharging treated wastewater which is up to standard through a sand filter; treating sludge settling in the coagulating sedimentation basin through a sludge concentration basin. The process method is simple in technical scheme and operation, can effectively and deeply treat the tannery wastewater subjected to physical and biochemical treatment, is mild in reaction conditions and has no secondary pollution, and raw materials are easily available and quick to react.