| abstract |
The invention is a process for treating wastewater, which comprises (a) acidifying the wastewater and eliminating sedimentable and / or floating floats, (b) performing on the wastewater resulting from stage (a) Fenton oxidation or Catalytic wet oxidation in the presence of H {sub, 2} O {sub, 2} using a Fe / {ga} -Al {sub, 2} O {sub, 3} catalyst and (c) perform on the residual water resulting from step (b) biological oxidation in a sequential batch reactor (SBR) in the presence of active sludge. The invention also relates to a process for obtaining the Fe / {ga} -Al {sub, 2} O {sub, 3} catalyst, which comprises (a) impregnating a support with a precursor salt, (b) drying at 40 -80�C for 10-15 hours, (c) keep at a temperature between 20 and 30�C between 1 and 3 hours and (d) calcine for 2-6 hours in an air atmosphere at 200-400�C. |