Novel method for treating nitrophenol wastewater

[0025] Example 1

[0026] This example is a comparative example, and the wastewater was treated with Fenton reagent alone without microwave.

[0027] Add 200ml of wastewater to a stirred reactor, the COD of the raw water is 22000mg / L, and continuously add Fenton reagent, where the ratio of hydrogen peroxide to ferrous sulfate is 10:1, and the dosage of Fenton reagent is 5 ml / m 3 , Maintain stirring for 1 hour, sample and analyze, the removal rate of COD reached 68.9%; the biodegradability analysis of the oxidized effluent, B / C=0.32.

[0028] Example 2

[0029] Add 200ml of wastewater to the stirred reactor, the COD of the raw water is 22000mg / L, put the reactor into the microwave transmitter, select the emission power of 600w, and continuously add Fenton reagent, where the ratio of hydrogen peroxide to ferrous sulfate is 10: 1. The dosage of Fenton reagent is 5 ml / m 3 . The microwave irradiation time was 5 minutes, and then it was taken out and stirred for 1 hour. After sampling and analysis, the removal rate of COD reached 82.9%; the biodegradability analysis of the oxidized effluent showed that B / C=0.33.

[0030] Example 3

[0031] Add 200ml of wastewater to the stirred reactor, the COD of the raw water is 22000mg / L, put the reactor into the microwave transmitter, select the transmission power of 700w, and continuously add Fenton reagent, where the ratio of hydrogen peroxide to ferrous sulfate is 2: 1. The dosage of Fenton's reagent is 10 ml / m 3 . The microwave irradiation time was 6 minutes, and then it was taken out and stirred for 1 hour. After sampling and analysis, the removal rate of COD reached 83.1%; the biodegradability analysis of the oxidized effluent showed that B / C=0.32.