Comprehensive treatment system and treatment process for organic wastewater and tail gas of contaminated sites

A comprehensive treatment system for organic wastewater and tail gas of contaminated sites, characterized in that,

• it comprises a wastewater treatment unit (100) and a tail gas treatment unit (200),
• wherein the wastewater treatment unit (100) comprises an oxidant addition unit (110), a first ultraviolet reaction unit (120) and a second ultraviolet reaction unit (130) connected in sequence;
• the oxidant addition unit (110) is connected to the wastewater to be treated and is used to add oxidants to the wastewater to be treated;
• the first ultraviolet reaction unit (120) comprises several first ultraviolet reactors in which several first ultraviolet lamps (1211) are provided;
• when the number of the first ultraviolet reactors is ≥2, the series/parallel connection mode of the first ultraviolet reactors can be switched, and the first ultraviolet reactors meet the requirement that the residence time of the wastewater to be treated in the first ultraviolet reactors is t1;
• the second ultraviolet reaction unit (130) comprises several second ultraviolet reactors in which several second ultraviolet lamps (1311) are provided;
• when the number of the second ultraviolet reactors is ≥2, the second ultraviolet reactors are connected in series;
• and the second ultraviolet reactors meet the requirement that the residence time of the wastewater to be treated in the second ultraviolet reactors is t2;
• the residence time t1 is less than the residence time t2, and the power of the first ultraviolet lamp (1211) is greater than that of the second ultraviolet lamp (1311);
• the tail gas treatment unit (200) comprises several adsorption towers, which are connected in parallel and filled with absorbent resin;
• the absorbent resin needs to meet the requirement of a specific surface area of ≥1000 m2/g.