The invention discloses a method for treating nondegradable organic
wastewater by oxidation by using a
transition metal catalyst, which comprises the following steps: regulating the pH value of
wastewater to 3-7, sending the
wastewater into a three-phase reactor, adding a
transition metal catalyst accounting for 0.001-0.01 wt% of the wastewater, stirring, introducing
compressed air as an oxidant according to the air-water ratio of 5-20, reacting for 0.5-2 hours, carrying out coagulative
precipitation on the
effluent water, and discharging after reaching the standard or sending into a secondary biochemical tank for treatment. The
transition metal catalyst is a compound of two or more simple substances or oxides of iron,
manganese,
copper, silver,
nickel and
cobalt. The invention can be used as a
direct treatment method or
pretreatment method for nondegradable organic wastewater, enhances the biodegradability of the wastewater, and is beneficial to subsequent biochemical reaction. Compared with the common nondegradable organic wastewater treatment method, the invention has the advantages of milder
reaction conditions, quantitative catalyst addition, lower catalyst consumption, shorter
retention time, cheaper oxidant and lower treatment cost.