The invention relates to a method for treating
profenofos synthetic
wastewater by using
hydrogen peroxide, which comprises the following steps: after a proper amount of sulphuric acid is added to the
wastewater to regulate the acidity of the
wastewater, the
hydrogen peroxide is added to the wastewater for heating reaction,
bromide ions are oxidized into
bromine, other organic matters are oxidized, the
bromine is separated from the wastewater, and the wastewater from which the
bromine is separated is neutralized; the temperature of oxidation reaction is 0 to 105 DEG C, sulphuric acid,
hydrochloric acid,
nitric acid,
phosphoric acid or a mixture of the same can be added to the wastewater, the proper amount of acid is added for regulating the acidity of the wastewater until the concentration of
hydrogen ions is 0.01 to 10.0 mol / L, the concentration of the
hydrogen peroxide is 7 to 50 percent, the mol ratio of the
hydrogen peroxide to the bromine in the wastewater is from 1:0.5-1:4, the
hydrogen peroxide is added to the wastewater for reaction of 0.5 to 5.0 h, the wastewater introduced by a connecting
pipe of a wastewater overhead tank and the hydrogen
peroxide introduced by a connecting
pipe of a hydrogen peroxide overhead tank are collected into an oxidation
tower to for oxidation reaction, the upper end of a distillating
tower is connected with a condensator by a pipeline, and a fine bromine output
pipe is arranged after the condensation of the product of the oxidation reaction through a primary rectifying
tower and a secondary rectifying tower. The invention has simple integral technology, good stability, high reliability and low
operating cost.