Purification of wastewater contaminated with organic substances, by catalytic wet oxidation with hydrogen peroxide, comprises treating the wastewater at temperature and pressure in reactor and in catalytic reactor

摘要

The purification of wastewater contaminated with organic substances by catalytic wet oxidation with hydrogen peroxide, comprises treating the wastewater at 60-210[deg]C, a pressure of up to 30 bar and a retention time of 20-300 minutes in reactor (R01A, R02A, R03A) and in a catalytic reactor (R01B, R02B, R03B). The reactors are connected in a closed circuit. The ratio of the volumes of the reactor to the catalytic reactor is 30-200:1. Solid catalysts are used in the catalytic reactor and are seventh and eighth group metals, which are assigned as a subgroup or as noble metals in the periodic system. The purification of wastewater contaminated with organic substances by catalytic wet oxidation with hydrogen peroxide, comprises treating the wastewater at 60-210[deg]C, a pressure of up to 30 bar and retention time of 20-300 minutes in reactor (R01A, R02A, R03A) and in a catalytic reactor (R01B, R02B, R03B). The reactors are connected in a closed circuit. The ratio of the volumes of the reactor to the catalytic reactor is 30-200:1. Solid catalysts are used in the catalytic reactor and are seventh and eighth group metals, which are assigned as a subgroup or as noble metals in the periodic system. The hydrogen peroxide is dosed before supplying the water into the reactor. The added quantity of the hydrogen peroxide depends on the required oxidation potential. The PH value is adjusted from 7-9 in a reservoir for the wastewater. The purified water is stored in a buffer tank (P4) before entry into heat exchangers (W0, W1).