A sulfonic acid wastewater treatment device

Abstract

The utility model discloses a kind of sulfonic acid wastewater treatment devices, belong to water treatment field, the system main body of the utility model includes jar body and controller, jar body is by wastewater pretreatment unit, anaerobic treatment unit, efficient aerobic unit and sludge precipitation unit four parts constitute.The utility model discloses the device using sulfonic acid compound degradation bacteria to carry out biochemical treatment to sulfonic acid compound in wastewater, organic matter and sulfonic acid compound in wastewater can be removed, finally reach standard discharge.The device of the utility model has the characteristics of convenient installation, simple operation, load resistance, strong impact resistance, can effectively solve sulfonic acid wastewater pollution problem.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment methods, specifically to a treatment device for sulfonic acid-containing wastewater. Background Technology

[0002] Sulfonic acid compounds, due to their unique chemical structure and properties, are widely used in key industrial fields such as dyes, pharmaceuticals, pesticides, detergents, and surfactants. However, their production and application inevitably generate large amounts of industrial wastewater containing high concentrations of sulfonic acid organic compounds. This type of wastewater typically exhibits high chemical oxygen demand (COD), high salinity, significant biotoxicity, and sometimes a distinctive odor. Furthermore, its stable molecular structure makes it difficult to effectively degrade using conventional biological methods, posing a serious threat to the ecological environment. Direct discharge without proper treatment will lead to eutrophication of water bodies, disruption of aquatic ecosystem balance, and even potential harm to human health through bioaccumulation in the food chain.

[0003] Currently, the main technologies for treating sulfonic acid wastewater include physical, chemical, and biological methods. Physical methods, such as activated carbon adsorption, are simple to operate but have limited adsorption capacity, are difficult to regenerate, and have high operating costs. Furthermore, they are not effective at adsorbing certain sulfonic acid compounds (especially polysulfonic acid groups), as the alkaline groups on the activated carbon surface repel the electron-withdrawing sulfonic acid groups. Chemical methods, such as ozone oxidation and Fenton oxidation, can destroy sulfonic acid groups, but they are usually accompanied by high reagent costs and energy consumption, and may cause secondary pollution problems. Improper treatment can lead to the formation of more difficult-to-degrade intermediate products. Traditional biological methods perform reasonably well in treating low-concentration, easily degradable organic wastewater, but they are inadequate for high-concentration, highly toxic sulfonic acid wastewater. Microbial activity is easily inhibited, degradation efficiency is low, and system operation is unstable.

[0004] Therefore, developing a high-efficiency, stable, economical, and environmentally friendly sulfonic acid wastewater treatment device has become an urgent need for the sustainable development of environmental protection and related industries. In particular, for sulfonic acid wastewater with high concentrations and complex compositions, the market urgently needs an integrated solution that can achieve deep purification, automated operation, and good economic efficiency. This technological innovation can not only effectively alleviate the environmental pressure caused by sulfonic acid wastewater but also promote the green transformation of related industries. The biological treatment device for sulfonic acid compound wastewater disclosed in this invention is based on this need and aims to provide a reliable technical approach. Summary of the Invention

[0005] This utility model discloses a sulfonic acid wastewater treatment device to address the problems existing in the prior art. The process is simple to operate and highly efficient. It uses biological treatment methods to replace the traditional chemical pretreatment method, and can achieve a degradation rate of more than 90% for wastewater with an influent sulfonic acid concentration of less than 1000 mg / L after 3 days.

[0006] This utility model is implemented as follows: The sulfonic acid wastewater treatment device includes a tank and a control box. The tank includes a wastewater pretreatment unit, a high-efficiency anaerobic unit, a high-efficiency aerobic unit, and a sludge sedimentation unit. After initial conditioning, the sulfonic acid wastewater is connected to the wastewater pretreatment unit via a pipeline. The wastewater pretreatment unit is connected to the high-efficiency anaerobic unit via a gravity outlet. The high-efficiency anaerobic unit is connected to the high-efficiency aerobic unit via a gravity outlet. The high-efficiency aerobic unit is connected to the sludge sedimentation unit via a gravity outlet. The sludge sedimentation unit has an outlet pipe at the top with valves, and a sludge discharge pipe at the bottom with valves.

[0007] The connection relationship of the device is as follows: sulfonic acid wastewater is connected to the wastewater pretreatment unit through an inlet pipe; the wastewater pretreatment unit is connected to the anaerobic treatment unit through its effluent gravity outlet; the anaerobic treatment unit is connected to the high-efficiency aerobic unit through its effluent gravity outlet; and the high-efficiency aerobic unit is connected to the sludge sedimentation unit through its effluent gravity outlet. The sludge sedimentation unit is equipped with an effluent outlet pipe at its upper part, and a wastewater discharge valve is installed on the effluent outlet pipe. A sludge discharge pipe is also installed at the lower part of the sludge sedimentation unit, and a sludge discharge valve is installed on the sludge discharge pipe. The wastewater pretreatment unit is equipped with an aeration pipe, the high-efficiency aerobic unit is equipped with an aeration pipe, the anaerobic treatment unit is equipped with an anaerobic sludge discharge pipe, and the anaerobic sludge discharge pipe is equipped with an anaerobic sludge discharge valve.

[0008] Furthermore, the tank body is equipped with an insulation layer and a heating device.

[0009] Furthermore, the wastewater pretreatment unit, anaerobic treatment unit, high-efficiency aerobic unit, and sludge sedimentation unit of the tank are all equipped with pH meters, thermometers, DO meters, and level gauges.

[0010] Furthermore, the control box is equipped with a central control system. This system uses sensors in the wastewater pretreatment unit, anaerobic treatment unit, high-efficiency aerobic unit, and sludge sedimentation unit of the device to detect operating parameters in real time and can control related valves and fans.

[0011] Furthermore, the wastewater pretreatment unit, anaerobic treatment unit, high-efficiency aerobic unit, and sludge sedimentation unit are equipped with dosing ports at their upper ends, and dosing covers are provided on the dosing ports for the wastewater and treatment units, the anaerobic treatment unit, the high-efficiency aerobic unit, and the sludge sedimentation unit.

[0012] Furthermore, biological packing ropes are installed in the wastewater pretreatment unit, the high-efficiency anaerobic unit, and the high-efficiency aerobic unit; the diameter of the biological ropes is 80mm, the packing is fixed by multi-layer grid plates, and the seasoning is distributed in 30-50% of the tank volume.

[0013] Furthermore, 200-mesh powdered activated carbon is added to the wastewater pretreatment unit, the high-efficiency anaerobic unit, and the high-efficiency aerobic unit, with the amount of activated carbon added being 1% of the tank volume of the high-efficiency aerobic unit. Glucose with an equivalent COD of 300-500 mg / L is added to the wastewater pretreatment unit, the high-efficiency anaerobic unit, and the high-efficiency aerobic unit.

[0014] Furthermore, the wastewater pretreatment unit is inoculated with sulfonic acid compound degrading bacteria, including *Microbacterium esterae*; the anaerobic treatment unit is inoculated with highly efficient anaerobic compound bacteria, including *Bacillus brevis*, *Bacillus amyloliquefaciens*, and *Lysinophilus macrospinipes*; and the highly efficient aerobic unit is inoculated with highly efficient aerobic compound bacteria, including *Alcaligenes*, *Bacillus subtilis*, and *Bacillus belye*.

[0015] Furthermore, the sludge sedimentation unit is equipped with a sludge discharge pipe, and the discharged sludge is collected and returned to the high-efficiency oxidation unit through the above-mentioned dosing hole.

[0016] Furthermore, all valves and pumps are connected to the control box via wiring, ensuring that the equipment can be remotely controlled in real time. This utility model also discloses a treatment method for sulfonic acid wastewater, characterized by the following specific steps: Step 1: Adjust the pH of the wastewater to 7-8 and let it flow into the wastewater pretreatment unit; Step 2: In the wastewater pretreatment unit, sulfonic acid wastewater undergoes an aerobic biochemical reaction under the action of sulfonic acid compound degrading bacteria. The reaction temperature is controlled at 25~35℃, dissolved oxygen at 2~4 mg / L, and residence time at 48~72h. Step 3: After treatment by the wastewater pretreatment unit, the wastewater flows into the high-efficiency anaerobic unit, where anaerobic biochemical reactions are carried out by high-efficiency anaerobic compound bacteria. The temperature is controlled at 25~35℃ and the retention time is 48~72h. Step 4: After treatment in the high-efficiency anaerobic unit, the wastewater flows into the high-efficiency aerobic unit. In the high-efficiency aerobic unit, aerobic biochemical reactions are carried out by high-efficiency aerobic compound bacteria. The reaction temperature is controlled at 25~35℃, the dissolved oxygen is 2~4 mg / L, and the residence time is 48~72h. Step 5: After treatment by the high-efficiency aerobic unit, the wastewater flows into the sludge sedimentation unit, where sludge and water are separated under gravity. The treated clean water is discharged from the upper drainage pipe, while the sludge is discharged from the lower sludge pipe. The discharged sludge is then added back into the high-efficiency aerobic unit.

[0017] The advantages of this utility model over the prior art are as follows: This device is an integrated unit that is easy to assemble and is suitable for new project construction or renovation of old projects. This device utilizes sulfonic acid degrading bacteria to biochemically treat sulfonic acid in wastewater, effectively solving the problem of sulfonic acid in wastewater inhibiting subsequent biochemical processes. Conventional physicochemical methods for treating sulfonic acid wastewater are costly and complex, while the method provided by this device is relatively low-cost and easy to operate, which greatly improves wastewater treatment capacity and reduces the footprint and operating costs of the entire system. This device has been verified and features strong load resistance, impact resistance, and high tolerance to the toxicity of sulfonic acid substances. It also provides stable effluent quality, is easy to maintain, and is suitable for industrial applications. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a device for treating sulfonic acid wastewater according to the present invention.

[0019] Among them, 1-tank body, 2-control box, 3-wastewater pretreatment unit, 4-anaerobic treatment unit, 5-high-efficiency aerobic unit, 6-sludge sedimentation unit, 7-inlet pipe, 8-inlet valve, 9-wastewater pretreatment unit effluent outlet, 10-anaerobic treatment unit effluent outlet, 11-high-efficiency aerobic unit effluent outlet, 12-sludge sedimentation unit effluent pipe, 13-sludge sedimentation unit effluent pipe valve, 14-sludge discharge pipe, 15-pipe The following are the components installed on the pipeline: 16-sludge discharge valve, 17-aeration pipeline of wastewater pretreatment unit, 18-dosing cover of wastewater and treatment unit, 19-dosing cover of anaerobic treatment unit, 20-dosing cover of high-efficiency aerobic unit, 21-dosing cover of sludge sedimentation unit, 22-valve of aeration pipeline of wastewater and treatment unit, 23-valve of aeration pipeline of high-efficiency aerobic unit, 24-anaerobic sludge discharge pipeline, 25-anaerobic sludge discharge valve. Detailed Implementation

[0020] This utility model provides a treatment device for sulfonic acid wastewater. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, and with reference to the accompanying drawings and examples, this utility model will be further described in detail. It should be noted that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0021] like Figure 1 As shown, the system of this utility model sequentially includes a tank 1, a wastewater pretreatment unit 3, an anaerobic treatment unit 4, a high-efficiency aerobic unit 5, a sludge sedimentation unit 6, an inlet pipe 7, an inlet valve 8, a wastewater pretreatment unit outlet pipe 9, a wastewater regulating unit outlet 10, an anaerobic treatment unit outlet 11, a high-efficiency aerobic unit outlet 12, a sludge sedimentation unit outlet 13, a sludge discharge pipe 14, a sludge discharge valve 15 installed on the pipe, an aeration pipe 16 for the wastewater pretreatment unit, an aeration pipe 17 for the high-efficiency aerobic unit, a dosing cover 18 for the wastewater treatment unit, a dosing cover 19 for the anaerobic treatment unit, a high-efficiency aerobic unit 20, a sludge sedimentation unit 21, a valve 22 for the wastewater pretreatment unit aeration pipe, a valve 23 for the high-efficiency aerobic unit aeration pipe, an anaerobic sludge discharge pipe 24, and an anaerobic sludge discharge valve 25. The control box 2 is equipped with a central control system. This system uses sensors in the wastewater pretreatment unit 3, anaerobic treatment unit 4, high-efficiency aerobic unit 5 and sludge sedimentation unit 6 of the device to detect operating parameters in real time and can control the relevant valves and fans.

[0022] The connection relationship of the device is as follows: the tank 1 includes a wastewater pretreatment unit 3, an anaerobic treatment unit 4, a high-efficiency aerobic unit 5, and a sludge sedimentation unit 6. Sulfonic acid wastewater is connected to the wastewater pretreatment unit 3 through an inlet pipe 7, and an inlet valve 8 is installed on the inlet pipe 7. The wastewater pretreatment unit 3 is connected to the anaerobic treatment unit 4 through a wastewater pretreatment unit gravity outlet 9. The anaerobic treatment unit 4 is connected to the high-efficiency aerobic unit 5 through an anaerobic treatment unit gravity outlet 10. The high-efficiency aerobic unit 5 is connected to the sludge sedimentation unit 6 through a high-efficiency aerobic unit gravity outlet 11. A sludge sedimentation unit outlet pipe 12 is installed at the top of the sludge sedimentation unit 6, and a sludge sedimentation unit outlet valve 13 is installed on the sludge sedimentation unit outlet pipe 12. A sludge discharge pipe 14 is installed at the bottom of the sludge sedimentation unit 6, and a sludge discharge valve 15 is installed on the pipe. A wastewater pretreatment unit aeration pipe 16 is installed in the wastewater pretreatment unit 3, and a high-efficiency aerobic unit aeration pipe 17 is installed in the high-efficiency aerobic unit 5.

[0023] The wastewater pretreatment unit is inoculated with sulfonic acid compound degradation bacteria; the anaerobic treatment unit is inoculated with highly efficient anaerobic compound bacteria; and the highly efficient aerobic unit is inoculated with highly efficient aerobic compound bacteria. The carriers in the wastewater pretreatment unit, anaerobic treatment unit, and highly efficient aerobic unit are one or a combination of two of the following: biological packing rope and biological activated carbon carrier. The diameter of the biological rope is 80 mm, and the carbon particle size of the biological carrier is 200 mesh. The highly efficient sulfonic acid degradation compound bacteria are immobilized on the biological packing rope and the biological activated carbon carrier. The wastewater treatment unit and the high-efficiency aerobic device are equipped with aeration devices at the bottom, and the sludge sedimentation unit is equipped with a sludge discharge pipe.

[0024] The method of using this utility model device is as follows: like Figure 1 As shown, the pH of the sulfonic acid-containing wastewater to be treated is first adjusted to 7-8 as a precondition for the biological reaction.

[0025] The wastewater is then sent to the wastewater pretreatment unit, where the reaction temperature is controlled at 25~35℃, the dissolved oxygen at 2~4mg / L, and the retention time at 48h~72h.

[0026] The wastewater is then sent to the anaerobic treatment unit, where the reaction temperature is controlled at 25-35℃ and the retention time is 48-72h.

[0027] The wastewater is then further fed into a high-efficiency aerobic unit, where the reaction temperature is controlled at 25-35℃, dissolved oxygen at 2-4 mg / L, and retention time at 48-72 hours. Finally, the wastewater after the biological aerobic reaction enters the sludge sedimentation unit for sludge-water separation, achieving the goal of meeting discharge standards.

[0028] This invention utilizes sulfonic acid-degrading bacteria to biochemically treat sulfonic acid in wastewater, effectively solving the problem of sulfonic acid wastewater pollution. This invention also discloses a wastewater treatment process using this integrated device, which is easy to install and has a simple treatment flow. The device is highly resistant to loads and impacts, simple to operate for treating sulfonic acid wastewater, produces significant wastewater treatment results with stable effluent quality, is easy to maintain, and is suitable for industrial applications.

[0029] The following are specific examples.

[0030] A wastewater containing sulfonic acid from Jiangsu Province was selected, with a COD of 4456 mg / L and a sulfonic acid compound concentration of 864 mg / L. The specific procedures are as follows: Biological water distribution: Adjust the pH of the sulfonic acid-containing wastewater to be treated to 7-8; Biological wastewater is sent to the wastewater pretreatment unit, where the reaction temperature is controlled at 25~35℃, dissolved oxygen at 2~4mg / L, and retention time at 48h~72h. After treatment in the wastewater pretreatment unit, the wastewater flows into the anaerobic treatment unit, where the reaction temperature is controlled at 25~35℃ and the residence time is 48h~72h.

[0031] After treatment in the anaerobic unit, the wastewater flows into the high-efficiency aerobic unit, where the reaction temperature is controlled at 25~35℃, dissolved oxygen at 2~4 mg / L, and retention time at 48h~72h. After treatment by the high-efficiency aerobic unit, the wastewater flows into the sludge sedimentation unit, where sludge and water are separated under gravity. The treated clean water is discharged from the upper drainage pipe, while the sludge is discharged from the lower sludge pipe. The discharged sludge is then added back into the high-efficiency aerobic unit.

[0032] Under the above operating conditions, the COD of the influent to the device is 4456 mg / L and the sulfonic acid concentration is 864 mg / L. After treatment by this device, the COD of the effluent is less than 267 mg / L and the sulfonic acid concentration is 0.032 mg / L. The COD removal rate is about 94% and the sulfonic acid removal rate is greater than 99%.

[0033] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A sulfonic acid wastewater treatment device, characterized in that, The processing device includes: a tank (1) and a control box (2); The tank (1) includes a wastewater pretreatment unit (3), an anaerobic treatment unit (4), a high-efficiency aerobic unit (5), and a sludge sedimentation unit (6). The connection relationship of the device is as follows: sulfonic acid wastewater is connected to wastewater pretreatment unit (3) through inlet pipe (7), wastewater pretreatment unit (3) is connected to anaerobic treatment unit (4) through wastewater pretreatment unit outlet (9), anaerobic treatment unit (4) is connected to high-efficiency aerobic unit (5) through anaerobic treatment unit outlet (10), and high-efficiency aerobic unit (5) is connected to sludge sedimentation unit (6) through high-efficiency aerobic unit outlet (11); sludge sedimentation unit (6) is provided with sludge sedimentation unit outlet pipe (12) at the top, wastewater discharge valve (13) is provided on sludge sedimentation unit outlet pipe (12), sludge discharge pipe (14) is provided at the bottom of sludge sedimentation unit (6), and sludge discharge valve (15) is provided on sludge discharge pipe (14); The wastewater pretreatment unit (3) is equipped with a wastewater pretreatment unit aeration pipe (16), the high-efficiency aerobic unit (5) is equipped with a high-efficiency aerobic unit aeration pipe (17), the anaerobic treatment unit (4) is equipped with an anaerobic sludge discharge pipe (24), and the anaerobic sludge discharge pipe (24) is equipped with an anaerobic sludge discharge valve (25).

2. The sulfonic acid wastewater treatment device according to claim 1, characterized in that, The tank (1) is equipped with an insulation layer inside and a heating device.

3. The sulfonic acid wastewater treatment device according to claim 1, characterized in that, pH meter, thermometer, DO meter and level gauge are installed in the wastewater pretreatment unit (3), anaerobic treatment unit (4), high-efficiency aerobic unit (5) and sludge sedimentation unit (6) of the tank (1).

4. The sulfonic acid wastewater treatment device according to claim 1, characterized in that, The control box (2) is equipped with a central control system. The system uses sensors in the wastewater pretreatment unit (3), anaerobic treatment unit (4), high-efficiency aerobic unit (5) and sludge sedimentation unit (6) of the device to detect operating parameters in real time and can control related valves and fans.

5. The sulfonic acid wastewater treatment device according to claim 1, characterized in that, The wastewater pretreatment unit (3), anaerobic treatment unit (4), high-efficiency aerobic unit (5) and sludge sedimentation unit (6) are provided with dosing ports at the top. The dosing ports are provided with dosing covers (18) for wastewater and treatment units, dosing covers (19) for anaerobic treatment units, dosing covers (20) for high-efficiency aerobic units, and dosing covers (21) for sludge sedimentation units.

6. The sulfonic acid wastewater treatment device according to claim 1, characterized in that, The wastewater pretreatment unit (3) is equipped with a wastewater pretreatment unit aeration pipe (16), and a wastewater and treatment unit aeration pipe valve (22) is installed on the pipe. The high-efficiency aerobic unit (5) is equipped with a high-efficiency aerobic unit aeration pipe (17), and a high-efficiency aerobic unit aeration valve (23) is installed on it. The wastewater pretreatment unit (3) is inoculated with sulfonic acid compound degrading bacteria, including *Microbacterium esterae*. The anaerobic treatment unit (4) is inoculated with high-efficiency anaerobic compound bacteria, including *Bacillus brevis*, *Bacillus amyloliquefaciens*, and *Lysinus maximus*. The efficient aerobic unit (5) is inoculated with efficient aerobic compound bacteria, which include Alcaligenes, Bacillus subtilis and Bacillus belesii; the carriers in the wastewater pretreatment unit (3), anaerobic treatment unit (4) and efficient aerobic unit (5) are one or a combination of biological packing rope and biological activated carbon carrier; the diameter of the biological packing rope is 80 mm, and the carbon particle size of the biological carrier is 40~120 mesh; the bacteria in the wastewater pretreatment unit (3), anaerobic treatment unit (4) and efficient aerobic unit (5) are immobilized on the biological packing rope and biological activated carbon carrier.

7. The sulfonic acid wastewater treatment device according to claim 1, characterized in that, Biological packing ropes and biological activated carbon are installed as biological carriers in the wastewater pretreatment unit (3), anaerobic treatment unit (4) and high-efficiency aerobic unit (5).

8. The sulfonic acid wastewater treatment device according to claim 1, characterized in that, The anaerobic treatment unit (4) is configured as a hammer-shaped structure that is wider at the top and narrower at the bottom.

9. A sulfonic acid wastewater treatment device according to claim 1, characterized in that, The sulfonic acid wastewater is connected to the wastewater pretreatment unit (3) through the inlet pipe (7), and an inlet valve (8) is installed on the inlet pipe (7).

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