Device for treating refractory waste through combination of ozone / hydrogen peroxide and biological activated carbon

Abstract

The utility model relates to a device for treating refractory waste by ozone / hydrogen peroxide combined with biological activated carbon, belongs to the technical field of sewage treatment, and in particular relates to a device for treating refractory waste by ozone / hydrogen peroxide combined with biological activated carbon, which comprises a combined oxidation pond, a notch is jointly formed between the combined oxidation pond and the biological activated carbon pond, a supporting plate is fixedly mounted on the other side of the combined oxidation pond, a mixing pressure pump is fixedly mounted on the supporting plate, and an inductor is fixedly mounted on one side of the biological activated carbon pond; the device achieves the effect of high ozone utilization rate, and solves the problems that the existing ozone is low in dissolving efficiency in wastewater, low in ozone utilization rate and poor in treatment effect on refractory wastewater; the cost is directly influenced by the adding amount of ozone, so that the investment cost and the operation cost of an ozone oxidation method are relatively high.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a device for treating recalcitrant waste using a combination of ozone / hydrogen peroxide and biological activated carbon. Background Technology

[0002] Chemical wastewater still has high COD, color, and toxic and harmful components after biochemical treatment. Direct discharge will cause great harm to human health and the surrounding environment [1]. Ozone oxidation has the characteristics of strong oxidation capacity, fast reaction and convenient use. In recent years, it has been widely used for the deep treatment of wastewater [2].

[0003] A search revealed Chinese patent CN105366796A, which discloses an ozone catalytic device for wastewater treatment. The device includes an ozone catalytic tower body, an ozone unit supplying ozone to the tower body, and a catalytic unit supplying a catalyst to the tower body. The ozone catalytic tower body has an inlet pipe at the bottom and an outlet above the inlet pipe. The catalytic unit mixes the catalyst with the wastewater via a pipe mixer and is connected to the inlet pipe. The ozone unit includes an ozone dissolving tank for dissolving ozone in water, which is connected to the inlet pipe. This invention improves ozone utilization and catalytic oxidation efficiency, resulting in a more complete catalytic oxidation reaction. Furthermore, its compact mechanical structure allows the reaction process to be completed within the same device, reducing the footprint.

[0004] Based on the above search results combined with existing technologies, the findings were as follows:

[0005] The aforementioned patents indicate that ozone has low solubility in wastewater, resulting in low ozone utilization and poor treatment of recalcitrant wastewater. Furthermore, the amount of ozone added directly affects the cost, leading to high investment and operating costs for ozone oxidation, thus limiting its effectiveness. Utility Model Content

[0006] To address the aforementioned technical problems, this invention proposes a device for treating recalcitrant waste using a combination of ozone / hydrogen peroxide and biological activated carbon, which reduces investment costs and improves degradation quality.

[0007] The technical solution to achieve the purpose of this utility model is: an ozone / hydrogen peroxide combined biological activated carbon treatment device for recalcitrant waste, including a combined oxidation tank, a biological activated carbon tank fixedly installed on one side of the combined oxidation tank, a common slot opened between the combined oxidation tank and the biological activated carbon tank, a support plate fixedly installed on the other side of the combined oxidation tank, a mixing and pressurizing pump fixedly installed on the support plate, and an inductor fixedly installed on one side of the biological activated carbon tank.

[0008] Preferably, a wastewater pipe and a hydrogen peroxide pipe are fixedly connected to one side of the mixing and pressurizing pump, and a delivery pipe is fixedly connected between the mixing and pressurizing pump and the combined oxidation tank.

[0009] Preferably, an ozone generator is provided on one side of the combined oxidation tank, and a pipeline is fixedly connected between the combined oxidation tank and the ozone generator.

[0010] Preferably, an ozone decomposer is installed at the top of the combined oxidation tank, and a pipe is fixedly connected between the combined oxidation tank and the ozone decomposer.

[0011] Compared with existing technologies, the significant advantages of this invention are:

[0012] Firstly, this invention improves ozone utilization. According to experimental data, compared with ozone alone, the COD removal rate of hydrogen peroxide / ozone combined oxidation can be increased by 14%, which significantly improves the treatment effect of difficult-to-degrade wastewater.

[0013] Secondly, the ozone dosage of this invention is reduced. With the combined oxidation of hydrogen peroxide and ozone, large-molecule recalcitrant organic matter is converted into small-molecule easily degradable organic matter, which improves the oxidation and degradation capacity of the subsequent granular activated carbon adsorption tank. The color, odor, and organic pollutants in the water are removed by the activated carbon adsorption filtration and biodegradation process. Compared with ozone oxidation alone, the amount of ozone required to achieve the same treatment effect is reduced, which directly reduces the cost.

[0014] This method solves the problems of low ozone dissolution efficiency in wastewater, low ozone utilization rate, and poor treatment effect of recalcitrant wastewater; the ozone dosage directly affects the cost, resulting in high investment and operating costs for ozone oxidation. Attached Figure Description

[0015] The present invention will be further explained below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure provided by this utility model;

[0017] Figure 2 This is a schematic diagram of the overall front view structure provided by this utility model;

[0018] Figure 3 This is a schematic diagram of the overall cross-sectional structure provided by this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Combined oxidation tank; 2. Biological activated carbon tank; 3. Support plate; 4. Wastewater pipe; 5. Hydrogen peroxide pipe; 6. Ozone generator; 7. Ozone decomposer; 8. Inductor; 9. Mixing and pressurizing pump; 10. Tank opening; 11. Pipeline 1; 12. Pipeline 2; 13. Conveying pipe. Detailed Implementation

[0021] The present invention will now be described in detail, and the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention.

[0022] This utility model provides an improved device for treating recalcitrant waste using a combination of ozone / hydrogen peroxide and biological activated carbon. The technical solution of this utility model is as follows:

[0023] like Figure 1-3 As shown, an ozone / hydrogen peroxide combined with biological activated carbon device for treating recalcitrant waste includes a combined oxidation tank 1, a biological activated carbon tank 2 fixedly installed on one side of the combined oxidation tank 1, a common opening 10 between the combined oxidation tank 1 and the biological activated carbon tank 2, a support plate 3 fixedly installed on the other side of the combined oxidation tank 1, a mixing and pressurizing pump 9 fixedly installed on the support plate 3, and an inductor 8 fixedly installed on one side of the biological activated carbon tank 2. The device utilizes activated carbon adsorption filtration and biodegradation processes to remove color, odor, organic pollutants, etc. from the water, further reducing the COD value of the wastewater.

[0024] Furthermore, a wastewater pipe 4 and a hydrogen peroxide pipe 5 are fixedly connected to one side of the mixing pressurization pump 9, and a delivery pipe 13 is fixedly connected between the mixing pressurization pump 9 and the combined oxidation tank 1. This allows for the simultaneous delivery and mixing of different fluids, improving work efficiency. The design of the mixing pressurization pump 9 ensures uniform mixing, which helps improve the quality of the final product.

[0025] Furthermore, an ozone generator 6 is installed on one side of the combined oxidation tank 1, and a pipe 11 is fixedly connected between the combined oxidation tank 1 and the ozone generator 6. The ozone generator 6 has a simple structure, stable operation, and is easy for workers to maintain and operate.

[0026] Furthermore, an ozone decomposer 7 is installed at the top of the combined oxidation tank 1, and a pipe 2 12 is fixedly connected between the combined oxidation tank 1 and the ozone decomposer 7. The ozone decomposer 7 catalytically decomposes ozone into oxygen, which is suitable for the purification of low to medium concentration ozone pollution and saves costs.

[0027] The specific working method is as follows: The device includes a combined oxidation tank 1 and a biological activated carbon tank 2; the water flow in the combined oxidation tank 1 adopts a vertical flow design, and a vertical flow guide baffle is installed in the tank. A slot 10 is left between the combined oxidation tank 1 and the biological activated carbon tank 2. An ozone pipe 11 is installed on the lower left side of the tank, and the ozone generator 6 is connected to the ozone generator 6; a microporous aeration device is installed on the ozone pipe 11 at the bottom of the tank. The microporous aeration device is mainly composed of a microporous aeration disc and a gas distribution device; a wastewater pipe 4 and a hydrogen peroxide pipe 5 are also installed on the upper left side of the tank. The delivery pipe 13 is connected to the wastewater pipe 4 and the hydrogen peroxide pipe 5 through a mixing and pressurizing pump 9; an ozone pipe 2 12 is installed at the top of the combined oxidation tank 1, and the ozone decomposer 7 is connected to the ozone decomposer 7.

[0028] An overflow weir is set on the right side of the combined oxidation tank, which is connected to the biological activated carbon tank. The wastewater in the combined oxidation tank, which has undergone hydrogen peroxide / ozone combined oxidation, flows into the biological activated carbon tank through the overflow weir.

[0029] The technical means disclosed in this utility model are not limited to those described above, but also include technical solutions composed of equivalent substitutions of the above technical features. Matters not covered in this utility model are common knowledge to those skilled in the art.

Claims

1. A device for treating recalcitrant waste using ozone / hydrogen peroxide combined with biological activated carbon, comprising a combined oxidation tank (1), characterized in that: A biological activated carbon tank (2) is fixedly installed on one side of the combined oxidation tank (1). A slot (10) is opened between the combined oxidation tank (1) and the biological activated carbon tank (2). A support plate (3) is fixedly installed on the other side of the combined oxidation tank (1). A mixing and pressurizing pump (9) is fixedly installed on the support plate (3). An inductor (8) is fixedly installed on one side of the biological activated carbon tank (2). A wastewater pipe (4) and a hydrogen peroxide pipe (5) are fixedly connected to one side of the mixing and pressurizing pump (9). A delivery pipe (13) is fixedly connected between the mixing and pressurizing pump (9) and the combined oxidation tank (1).

2. The device for treating recalcitrant waste using ozone / hydrogen peroxide combined with biological activated carbon according to claim 1, characterized in that: An ozone generator (6) is provided on one side of the combined oxidation tank (1), and a pipe (11) is fixedly connected between the combined oxidation tank (1) and the ozone generator (6).

3. The device for treating recalcitrant waste using ozone / hydrogen peroxide combined with biological activated carbon according to claim 1, characterized in that: An ozone decomposer (7) is provided at the top of the combined oxidation tank (1), and a pipe (12) is fixedly connected between the combined oxidation tank (1) and the ozone decomposer (7).

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