Method for removing refractory organic matters in industrial wastewater

A technology for refractory organic matter and industrial wastewater, which is applied in the field of wastewater treatment and can solve the problems of limiting the removal efficiency of activated carbon for refractory organic matter and the complex water quality of industrial wastewater.

Active Publication Date: 2020-12-29
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The water quality of industrial wastewater is complex. For example, the macromolecular humus substances carried by the coking wastewater coal itself and the macromolecular biopolymers produced during the bioche

Method used

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  • Method for removing refractory organic matters in industrial wastewater
  • Method for removing refractory organic matters in industrial wastewater
  • Method for removing refractory organic matters in industrial wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Example 1: Biochemical effluent treatment of coking wastewater by oxidation adsorption technology-activated carbon adsorption combined process

[0092] 1. Prepare compound oxidants and compound soluble metal salts

[0093] 1-1, the H 2 o 2 , sodium hypochlorite and sodium persulfate (both pure substances) are mixed uniformly to prepare a composite oxidizer for subsequent use, wherein the H in the composite oxidant 2 o 2 , The molar ratio of sodium hypochlorite and sodium persulfate is 1:0.046:0.043, H 2 o 2 , The mass ratio of sodium hypochlorite and sodium persulfate is 1:0.1:0.3;

[0094] Sodium hypochlorite in composite oxidizer can use potassium hypochlorite, hypochlorous acid to replace; Sodium persulfate can use potassium persulfate, ammonium persulfate to replace; In the embodiment of the present invention, H 2 o 2 , the mol ratio of sodium hypochlorite and sodium persulfate except being 1: 0.046: 0.043, other ratios such as 1: (0.027-0.456): (0.009-0.143)...

Embodiment 1A

[0122] Example 1A: Biochemical effluent treatment of coking wastewater by oxidation adsorption technology-activated carbon adsorption combined process

[0123] 1. Prepare compound oxidants and compound soluble metal salts

[0124] 1-1, the H 2 o 2 , sodium hypochlorite and sodium persulfate are mixed evenly according to the mass ratio of 1:0.2:0.06, and prepared into a composite oxidant for standby use, that is, H in the composite oxidant 2 o 2 , hypochlorite (ClO - ), persulfate (S 2 o 8 2- ) in a molar ratio of 1:0.091:0.009;

[0125] 1-2, the soluble metal salt FeSO 4 、CuSO 4 , MnSO 4 、CoSO 4 , CaCl 2 and MgSO 4 According to the mass ratio of 100: 0.5: 30: 0.5: 25: 0.1, it is mixed to make a composite soluble metal salt, which is ready for use, that is, Fe in the composite metal salt 2+ 、Cu 2+ , Mn 2+ 、Co 2+ , Ca 2+ , Mg 2+ The molar ratio is 100:0.475:30.2:0.490:34.2:0.127;

[0126] 2. In-situ oxidative degradation-adsorption treatment

[0127] Except ...

Embodiment 1B

[0131] Example 1B: Biochemical effluent treatment of coking wastewater by oxidation adsorption technology-activated carbon adsorption combined process

[0132] 1. Prepare compound oxidants and compound soluble metal salts

[0133] 1-1, the H 2 o 2 , sodium hypochlorite and sodium persulfate are mixed evenly according to the mass ratio of 1:0.06:1, and prepared into a composite oxidant for standby use, that is, H in the composite oxidizer 2 o 2 , hypochlorite (ClO - ), persulfate (S 2 o 8 2- ) The molar ratio is 1:0.027:0.143;

[0134] 1-2, the soluble metal salt FeSO 4 、CuSO 4 , MnSO 4 、CoSO 4 , CaCl 2 and MgSO 4 Mix according to the mass ratio of 100:50:0.2:15:0.4:10 to prepare a composite soluble metal salt for future use, that is, Fe in the composite metal salt 2+ 、Cu 2+ , Mn 2+ 、Co 2+ , Ca 2+ , Mg 2+ The molar ratio is 100:47.5:0.201:14.7:0.548:12.7;

[0135] 2. In-situ oxidative degradation-adsorption treatment

[0136] Except that the ratio of the CO...

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Abstract

The invention discloses a method for removing refractory (biodegradable) organic matters in industrial wastewater, which comprises the following steps: adding a composite oxidant, a composite solublemetal salt and modified activated carbon with developed mesopores into wastewater, and regulating the pH value of the wastewater to be greater than or equal to 4; and synchronously carrying out in-situ oxidation adsorption treatment and activated carbon adsorption treatment on refractory organic matters in the industrial wastewater. According to the method, the removal efficiency of refractory organic matters in the wastewater is high; and the problem that the activated carbon is blocked by macromolecular organic matters is remarkably reduced, and the adsorption removal of the activated carbonon refractory organic matters is promoted; in-situ oxidation adsorption and activated carbon adsorption are mutually assisted; and the method has the advantages of mild process conditions, easy reaction control, low consumption of the oxidant and the active carbon, short reaction time, and saving of the occupied area of equipment.

Description

technical field [0001] The invention relates to a method for treating waste water, in particular to a method for removing refractory organic matter in industrial waste water, and belongs to the field of waste water treatment. Background technique [0002] The effluent of industrial wastewater after biodegradation treatment is the biological effluent of industrial wastewater, in which there are still a large amount of organic matter that is difficult to be biodegraded. We call this type of organic matter difficult-to-biodegradable organic matter. Compared with general urban sewage, the refractory organic matter in industrial wastewater has the characteristics of high content, large chroma and complex composition. Therefore, a water treatment terminal guarantee technology is needed to further remove refractory organic matter to meet the requirements of water reuse or standard discharge. [0003] As a common advanced treatment technology for industrial wastewater, coagulation ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F9/14C02F1/72C02F1/76C02F1/28C02F101/30
CPCC02F1/283C02F1/5245C02F1/66C02F1/72C02F1/722C02F1/76C02F3/1257C02F3/1263C02F3/1268C02F9/00C02F2001/007C02F2101/30
Inventor 杨敏孙光溪张昱田哲丁然高迎新
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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