Overall process method of Fenton-like air-flotation process

Abstract

The invention discloses an overall process method of a Fenton-like air-flotation process. The whole process method is divided into two sections: in a first stage: a main Fenton-like reaction is completed, organic pollutants in wastewater are oxidatively decomposed, a novel pure fluid static pipeline reactor is disposed in a water absorbing well or a water collecting well, a Fenton-like medicamentand a liquid caustic soda are added in the pipeline reactor, the Fenton-like medicament is thoroughly mixed and then the organic pollutants in the printing and dyeing wastewater are oxidatively decomposed, and the pH is adjusted by the liquid caustic soda; and in a second stage: completion of mud-water separation: the mixed liquid after the Fenton-like reaction enters an air flotation machine through a lift pump, the mud-water separation is completed with the aid of an air flotation auxiliary agent. The purpose of adding the PAM (Polyacrylamide) is to enable small particles in the mixed liquidto form floccules with larger particles through flocculation, and the thorough mud-water separation is facilitated. The process method not only absorbs the technical advantages of the traditional Fenton process and the air floatation process, but also solves the technical problems existing in the two conventional processes.

Description

technical field

[0001] The invention relates to the technical field of industrial sewage treatment, in particular to an overall process method similar to the Fenton plus air flotation process. Background technique

[0002] my country is a big country in textile printing and dyeing production, and the discharge of printing and dyeing wastewater is huge. Printing and dyeing wastewater usually refers to the comprehensive wastewater discharged from various printing and dyeing processes such as desizing wastewater, boiling wastewater, bleaching wastewater, mercerizing wastewater, dyeing wastewater, printing wastewater, soap wastewater and finishing wastewater. Although the water quality of printing and dyeing wastewater from various enterprises varies greatly due to different production materials and production processes, in general, printing and dyeing wastewater has five common features: high concentration of pollutants, refractory degradation, high chroma, high toxicity, and m...

Examples

Embodiment 1

[0019] An overall process method similar to Fenton plus air flotation process, the whole process method is divided into two sections:

[0020] The first stage: complete the Fenton-like main reaction, oxidize and decompose organic pollutants in wastewater, set up a new type of pure fluid static pipeline reactor in the water absorption well or water collection well, and add Fenton-like chemicals and liquid caustic soda in the pipeline reactor, First, the Fenton-like chemicals are fully mixed and oxidized to decompose the organic pollutants in the printing and dyeing wastewater, and then the pH is adjusted by liquid alkali, and a large number of fine sludge particles are formed in the mixed solution. The main function is to degrade the organic pollutants and adjust the pH of the mixed solution to 6- 9. The main stage of reducing COD and chroma of printing and dyeing wastewater;

[0021] The second stage: complete the separation of mud and water, the mixed liquid after the Fenton-...

Embodiment 2

[0023] According to the overall process of the Fenton-like plus air flotation process described in Example 1, the Fenton-like agent is a combination of modified ferrous sulfate and hydrogen peroxide.

technical field

[0001] The invention relates to the technical field of industrial sewage treatment, in particular to an overall process method similar to the Fenton plus air flotation process. Background technique

[0002] my country is a big country in textile printing and dyeing production, and the discharge of printing and dyeing wastewater is huge. Printing and dyeing wastewater usually refers to the comprehensive wastewater discharged from various printing and dyeing processes such as desizing wastewater, boiling wastewater, bleaching wastewater, mercerizing wastewater, dyeing wastewater, printing wastewater, soap wastewater and finishing wastewater. Although the water quality of printing and dyeing wastewater from various enterprises varies greatly due to different production materials and production processes, in general, printing and dyeing wastewater has five common features: high concentration of pollutants, refractory degradation, high chroma, high toxicity, and m...

Examples

Embodiment 1

[0019] An overall process method similar to Fenton plus air flotation process, the whole process method is divided into two sections:

[0020] The first stage: complete the Fenton-like main reaction, oxidize and decompose organic pollutants in wastewater, set up a new type of pure fluid static pipeline reactor in the water absorption well or water collection well, and add Fenton-like chemicals and liquid caustic soda in the pipeline reactor, First, the Fenton-like chemicals are fully mixed and oxidized to decompose the organic pollutants in the printing and dyeing wastewater, and then the pH is adjusted by liquid alkali, and a large number of fine sludge particles are formed in the mixed solution. The main function is to degrade the organic pollutants and adjust the pH of the mixed solution to 6- 9. The main stage of reducing COD and chroma of printing and dyeing wastewater;

[0021] The second stage: complete the separation of mud and water, the mixed liquid after the Fenton-...

Embodiment 2

[0023] According to the overall process of the Fenton-like plus air flotation process described in Example 1, the Fenton-like agent is a combination of modified ferrous sulfate and hydrogen peroxide.

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