Method for photochemical degradation of phosphorus-containing wastewater

The invention discloses a method for photochemical degradation of phosphorous-containing wastewater, and aims to degrade organic matters and precipitate and remove phosphorus in phosphorus-containing wastewater. The method comprises the following steps: using peroxide as an oxidant, carbohydrate as an initiator, ferrous ion as a catalyst, ferrous ion complexing organic matter hydroxyacetic acid as a stabilizer, and soluble aluminum salt or calcium salt as a phosphate precipitant; and performing UV photo-oxidative degradation under a weak acidity condition of pH 2-6. In the method provided by the invention, the peroxide is decomposed through a UV-induced Fenton reaction to generate free radicals and the catalyst in a complexing state is used at the same time to eliminate the poisoning of phosphate radicals to the catalyst, thereby realizing the rapid degradation of high-concentration organic wastewater containing a large amount of phosphate radicals. The method has the advantages of simple steps, no need of he