Method for treating organic amine industrial waste water by Fenton-like oxidation-flocculation

Abstract

The invention relates to a method for treating organic amine industrial waste water by Fenton-like oxidation-flocculation. According to the method, the pH value of the waste water is adjusted to 3-5, and the temperature of the waste water is adjusted to 20-40 DEG C; a catalyst is added, wherein active ingredients of the catalyst comprise: ferrous sulfate, anhydrous cupric sulphate and manganese sulfate monohydrate, wherein the mass ratio of the ferrous sulfate to the anhydrous cupric sulphate to the manganese sulfate monohydrate is (5-10):1:(0-5); H2O2 (30%) is added, and the oxidation reaction time is 4 hours; after completing the oxidation reaction, sodium hydroxide is added to adjust the pH value of the waste water to 8-10; adding a chemical coagulant and an organic polymer flocculant, such that partial suspended solids, colloids and partial organic amines in the waste water are concurrently coagulated. According to the present invention, the Fenton-like oxidation-flocculation is adopted as the pretreatment for the organic amine waste water, such that the organic amines in the waste water can be effectively removed, the poison and the impact on microorganisms due to the high concentration organic amines in the wastewater can be reduced, the subsequent biological treatment is easily performed for the sewage.

Description

technical field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to the treatment of refractory organic amine industrial wastewater. Background technique

[0002] Organic amine products are important chemical raw materials with a wide range of uses, widely used in pesticides, medicines, rubber, synthetic dyes, petroleum, leather, detergents, organic synthesis, inorganic chemicals and other industries. At the same time, these industries have also become the main source of organic amine wastewater, which has always been a technical problem that plagues the water treatment industry. At present, most enterprises use biochemical methods to treat organic amine wastewater, but high-concentration organic amine wastewater has a strong poisonous and inhibitory effect on microorganisms. methods to reduce the impact of wastewater on biochemical systems. Treatment by physical and chemical methods has the problems of high treatme...

Examples

Embodiment 1

[0019] Embodiment 1: The inventive method handles triethanolamine wastewater

[0020] The total organic carbon TOC of a certain triethanolamine wastewater is 827mg / L, and the treatment process is as follows: the wastewater enters the reaction tank, the temperature of the wastewater is adjusted to 30°C, and the pH of the wastewater is adjusted to 3.5 by adding sulfuric acid. h 2 o 2 (30%) is added in an amount of 3.4% of waste water quality, H 2 o 2 (30%) is 11:1 with catalyst mass ratio, and the addition of catalyst is 3g / L, and catalyst FeSO 4 ·7H 2 O: CuSO 4 :MnSO 4 Take three different ratios of 10:1:5, 5:1:0, and 15:2:5, and use FeSO alone 4 ·7H 2 O served as a control. After the catalyst was completely dissolved, hydrogen peroxide was added dropwise in batches. During the reaction, sulfuric acid or sodium hydroxide was added to keep the pH stable and stirring was continued. The reaction time was 3 hours. A chemical coagulant is added to the oxidized effluent in ...

Embodiment 2

[0023] Implementation example 2: the inventive method handles certain mixed organic amine waste water

[0024] The TOC of an organic amine wastewater is 803.7mg / L, and the characteristic pollutants of the wastewater include ethanolamine, diethanolamine, triethanolamine, dimethylethanolamine, and ethylamine. The treatment process is as follows: the waste water enters the reaction tank, the temperature of the waste water is adjusted to 40°C, and the pH of the waste water is adjusted to 3 by adding sulfuric acid. h 2 o 2 (30%) addition is 3.7% of waste water quality, H 2 o 2 (30%) and catalyst mass ratio are respectively 4: 1, 13: 1, 20: 1, FeSO in the catalyst 4 ·7H 2 O: CuSO 4 :MnSO 4 =10:1:5. The addition amount of catalyst is 9.25g / L, 2.85g / L, 1.85g / L respectively. After the catalyst was completely dissolved, hydrogen peroxide was added dropwise in batches. During the reaction, sulfuric acid or sodium hydroxide was added to keep the pH stable and stirring was continu...

Embodiment 3

[0027] Implementation example 3: the inventive method handles aniline wastewater

[0028] The mass concentration of an aniline wastewater is 1264mg / L. The treatment process is as follows: the waste water enters the reaction tank, the temperature of the waste water is adjusted to 30°C, and the pH of the waste water is adjusted to 4 by adding sulfuric acid. h 2 o 2 (30%) addition is 2% of waste water quality, H 2 o 2 (30%) is 10:1 with catalyst mass ratio, and the addition amount of catalyst is 2g / L, and in the catalyst FeSO 4 ·7H 2 O: CuSO 4 :MnSO 4 =10:1:1. After the catalyst was completely dissolved, hydrogen peroxide was added dropwise in batches. During the reaction, the pH was kept stable by adding sulfuric acid or sodium hydroxide, and the reaction time was 4 hours. A chemical coagulant is added to the oxidized effluent, the dosage is 1g / L, and the ratio of coagulant ferrous sulfate: ferric sulfate: polyaluminum ferric sulfate is 10:1:1, 15:5:1, 20:10:1 respectiv...

technical field

[0001] The invention belongs to the technical field of environmental protection, and in particular relates to the treatment of refractory organic amine industrial wastewater. Background technique

[0002] Organic amine products are important chemical raw materials with a wide range of uses, widely used in pesticides, medicines, rubber, synthetic dyes, petroleum, leather, detergents, organic synthesis, inorganic chemicals and other industries. At the same time, these industries have also become the main source of organic amine wastewater, which has always been a technical problem that plagues the water treatment industry. At present, most enterprises use biochemical methods to treat organic amine wastewater, but high-concentration organic amine wastewater has a strong poisonous and inhibitory effect on microorganisms. methods to reduce the impact of wastewater on biochemical systems. Treatment by physical and chemical methods has the problems of high treatme...

Examples

Embodiment 1

[0019] Embodiment 1: The inventive method handles triethanolamine wastewater

[0020] The total organic carbon TOC of a certain triethanolamine wastewater is 827mg / L, and the treatment process is as follows: the wastewater enters the reaction tank, the temperature of the wastewater is adjusted to 30°C, and the pH of the wastewater is adjusted to 3.5 by adding sulfuric acid. h 2 o 2 (30%) is added in an amount of 3.4% of waste water quality, H 2 o 2 (30%) is 11:1 with catalyst mass ratio, and the addition of catalyst is 3g / L, and catalyst FeSO 4 ·7H 2 O: CuSO 4 :MnSO 4 Take three different ratios of 10:1:5, 5:1:0, and 15:2:5, and use FeSO alone 4 ·7H 2 O served as a control. After the catalyst was completely dissolved, hydrogen peroxide was added dropwise in batches. During the reaction, sulfuric acid or sodium hydroxide was added to keep the pH stable and stirring was continued. The reaction time was 3 hours. A chemical coagulant is added to the oxidized effluent in ...

Embodiment 2

[0023] Implementation example 2: the inventive method handles certain mixed organic amine waste water

[0024] The TOC of an organic amine wastewater is 803.7mg / L, and the characteristic pollutants of the wastewater include ethanolamine, diethanolamine, triethanolamine, dimethylethanolamine, and ethylamine. The treatment process is as follows: the waste water enters the reaction tank, the temperature of the waste water is adjusted to 40°C, and the pH of the waste water is adjusted to 3 by adding sulfuric acid. h 2 o 2 (30%) addition is 3.7% of waste water quality, H 2 o 2 (30%) and catalyst mass ratio are respectively 4: 1, 13: 1, 20: 1, FeSO in the catalyst 4 ·7H 2 O: CuSO 4 :MnSO 4 =10:1:5. The addition amount of catalyst is 9.25g / L, 2.85g / L, 1.85g / L respectively. After the catalyst was completely dissolved, hydrogen peroxide was added dropwise in batches. During the reaction, sulfuric acid or sodium hydroxide was added to keep the pH stable and stirring was continu...

Embodiment 3

[0027] Implementation example 3: the inventive method handles aniline wastewater

[0028] The mass concentration of an aniline wastewater is 1264mg / L. The treatment process is as follows: the waste water enters the reaction tank, the temperature of the waste water is adjusted to 30°C, and the pH of the waste water is adjusted to 4 by adding sulfuric acid. h 2 o 2 (30%) addition is 2% of waste water quality, H 2 o 2 (30%) is 10:1 with catalyst mass ratio, and the addition amount of catalyst is 2g / L, and in the catalyst FeSO 4 ·7H 2 O: CuSO 4 :MnSO 4 =10:1:1. After the catalyst was completely dissolved, hydrogen peroxide was added dropwise in batches. During the reaction, the pH was kept stable by adding sulfuric acid or sodium hydroxide, and the reaction time was 4 hours. A chemical coagulant is added to the oxidized effluent, the dosage is 1g / L, and the ratio of coagulant ferrous sulfate: ferric sulfate: polyaluminum ferric sulfate is 10:1:1, 15:5:1, 20:10:1 respectiv...

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