A pyridine wastewater treatment device

Abstract

This utility model discloses a pyridine wastewater treatment device, belonging to the field of water treatment. The main body of the system includes a tank and a controller. The tank consists of three parts: a water distribution and regulation unit, a high-efficiency oxidation unit, and a sludge sedimentation unit. This utility model discloses a device that utilizes highly efficient pyridine-degrading compound bacteria to biochemically treat pyridine in wastewater, removing organic matter and pyridine from the wastewater, ultimately achieving compliant discharge. The device of this utility model is characterized by convenient installation, simple operation, high load resistance, and strong impact resistance, effectively solving the problem of pyridine wastewater pollution.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment methods, specifically to a device for treating pyridine wastewater. Background Technology

[0002] In the chemical industry, pyridine and its derivatives have wide applications in pharmaceuticals, pesticides, dyes, and fragrances due to their unique physicochemical properties. However, these compounds are also typical recalcitrant organic pollutants, and their production processes often generate industrial wastewater containing high concentrations of pyridine. This type of wastewater is not only highly toxic and poorly biodegradable, but also causes serious environmental pollution, especially impacting aquatic ecosystems.

[0003] Currently, the main methods for treating pyridine-containing wastewater include physical methods (such as adsorption and membrane separation), chemical methods (such as oxidation and electrolysis), and biological methods (such as microbial degradation). However, each method has its limitations: physical methods are costly and difficult to completely remove pyridine; chemical methods may cause secondary pollution; and while biological methods have certain advantages, their effectiveness is limited when treating wastewater with high concentrations or complex components.

[0004] Therefore, developing an efficient, economical, and environmentally friendly pyridine wastewater treatment technology has become a key research focus and an urgent need. An ideal treatment device should effectively overcome the shortcomings of existing technologies, achieve deep purification of pyridine pollutants, and maximize resource recovery and utilization, thereby reducing environmental pollution while improving economic benefits. Summary of the Invention

[0005] This utility model discloses a pyridine wastewater treatment device to address the problems existing in the prior art. The process is simple to operate and highly efficient, enabling professional biodegradation of wastewater with an influent pyridine concentration of less than 4000 mg / L. The acclimatization period is shortened to less than 5 days, and the degradation efficiency is higher than 90%.

[0006] This utility model is implemented as follows: the processing device includes a tank and a control box;

[0007] The tank includes a water distribution and regulating unit, a high-efficiency aerobic unit, and a sludge sedimentation unit. The water distribution and regulating unit is connected to the high-efficiency aerobic unit via a water distribution and regulating unit outlet pipe, which is equipped with a water distribution and regulating unit outlet valve and a second centrifugal pump. The high-efficiency aerobic unit is connected to the sludge sedimentation unit via a high-efficiency aerobic unit outlet pipe, which is equipped with a high-efficiency aerobic unit outlet valve and a first centrifugal pump. The sludge sedimentation unit has an outlet pipe at the top with an outlet valve and a sludge discharge pipe at the bottom with a sludge discharge valve. Pyridine production wastewater is connected to the water distribution and regulating unit via an inlet pipe, which is equipped with an inlet valve.

[0008] Furthermore, the tank (1) is provided with an insulation layer inside.

[0009] Furthermore, the water distribution and regulating unit, the high-efficiency aerobic unit, and the sludge sedimentation unit are provided with dosing ports at their upper ends, and dosing ports are respectively provided for the water distribution and regulating unit, the high-efficiency aerobic unit, and the sludge sedimentation tank.

[0010] Furthermore, the high-efficiency aerobic unit is equipped with aeration pipes, each with an air inlet valve. Aerators are evenly distributed at the bottom of the aeration pipes. The high-efficiency aerobic unit is inoculated with highly efficient pyridine-degrading composite bacteria. The carrier in the high-efficiency aerobic unit is 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 40-120 mesh. The highly efficient pyridine-degrading composite bacteria are immobilized on the biological packing rope and biological activated carbon carrier. The packing is fixed by a multi-layer grid plate, and the packing is distributed in 30-50% of the volume of the high-efficiency aerobic unit.

[0011] Furthermore, the high-efficiency aerobic unit and the sludge settling unit are connected by a pipeline. The pipeline is equipped with the high-efficiency aerobic unit outlet valve and the first centrifugal pump. The pipeline inlet is relatively close to the bottom of the high-efficiency aerobic unit (3) to prevent some of the sludge that has not been aerated from accumulating and settling.

[0012] Furthermore, the sludge settling unit is configured as a hammer-shaped structure that is wider at the top and narrower at the bottom.

[0013] Furthermore, the control box is connected to the inlet pipe valve, aeration pipe valve, high-efficiency aerobic unit outlet valve, outlet pipe valve, sludge discharge valve, water distribution regulating unit outlet valve, and the first centrifugal pump and the second centrifugal pump via wiring. Each valve and centrifugal pump is equipped with a switch that can control each valve and centrifugal pump individually.

[0014] Furthermore, 200-mesh powdered activated carbon is added to 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 high-efficiency aerobic unit.

[0015] Furthermore, highly efficient pyridine-degrading compound bacteria are added to the highly efficient aerobic unit. These highly efficient pyridine-degrading compound bacteria include Bacillus anthracis, Bacillus belye, denitrifying achromobacterium, aquatic alkali-producing bacteria, and pyridine-eating Rhodococcus pyridostigma.

[0016] The high-efficiency aerobic unit and the sludge sedimentation unit are connected by a pipeline. The pipeline is equipped with the outlet valve of the high-efficiency aerobic unit and a centrifuge. The pipeline inlet is relatively close to the bottom of the high-efficiency aerobic unit to prevent some of the sludge that has not been aerated from accumulating and settling.

[0017] 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.

[0018] Furthermore, all valves and pumps are connected to the control box via wiring, ensuring that the equipment can be remotely controlled in real time.

[0019] This utility model also discloses a treatment method for pyridine wastewater, characterized by the following specific steps:

[0020] Step 1: Wastewater enters the water distribution and adjustment unit through pipes, and the pH is adjusted to 6~8;

[0021] Step 2: The biochemically treated water is pumped into the high-efficiency aerobic unit to undergo an aerobic biochemical reaction under the action of highly efficient pyridine-degrading composite bacteria. The reaction temperature is controlled at 25~35℃, the dissolved oxygen at 0.8~1.7 mg / L, and the residence time at 48~72h.

[0022] Step 3: After treatment by the high-efficiency aerobic unit, the wastewater is pumped 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.

[0023] The advantages of this utility model over the prior art are as follows:

[0024] This device is an integrated unit that is easy to assemble and is suitable for new project construction or renovation of old projects.

[0025] This device utilizes highly efficient pyridine-degrading bacteria to biochemically treat pyridine in wastewater, effectively solving the problem of pyridine wastewater pollution.

[0026] Conventional pyridine biochemical treatment takes a long time, while the method provided by this device has a relatively short treatment time, which greatly improves the wastewater treatment capacity and reduces the footprint and operating cost of the entire system.

[0027] This device has been verified and features strong load resistance, impact resistance, and tolerance to pyridine toxicity. It also provides stable effluent quality, is easy to maintain, and is suitable for industrial applications. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a pyridine wastewater treatment device according to the present invention.

[0029] Among them, 1-tank, 2-water distribution and regulation unit, 3-high-efficiency aerobic unit, 4-sludge sedimentation unit, 5-inlet pipe, 6-inlet pipe valve, 7-aeration pipe, 8-aeration pipe valve, 9-aerator, 10-high-efficiency aerobic unit outlet pipe, 11-high-efficiency aerobic unit outlet valve, 12-first centrifugal pump, 13-outlet pipe, 14-outlet pipe valve, 15-sludge discharge pipe, 16-sludge discharge valve, 17-water distribution and regulation unit dosing port, 18-high-efficiency aerobic unit dosing port, 19-sludge sedimentation tank dosing port, 20-water distribution and regulation unit outlet pipe, 21-water distribution and regulation unit outlet valve, 22-second centrifugal pump. Detailed Implementation

[0030] This utility model provides a device for treating pyridine 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.

[0031] like Figure 1 As shown, the system of this utility model sequentially includes a tank 1, a water distribution and regulating unit 2, a high-efficiency aerobic unit 3, a sludge sedimentation unit 4, an inlet pipe 5, an inlet pipe valve 6, an aeration pipe 7, an aeration pipe valve 8, an aerator 9, a high-efficiency aerobic unit outlet pipe 10, a high-efficiency aerobic unit outlet valve 11, a first centrifugal pump 12, an outlet pipe 13, an outlet pipe valve 14, a sludge discharge pipe 15, a sludge discharge valve 16, a water distribution and regulating unit dosing port 17, a high-efficiency aerobic unit dosing port 18, a sludge sedimentation tank dosing port 19, a water distribution and regulating unit outlet pipe 20, a water distribution and regulating unit outlet valve 21, and a second centrifugal pump 22.

[0032] The connection relationship of the device is as follows: Tank 1 includes a water distribution and regulation unit 2, a high-efficiency aerobic unit 3, and a sludge sedimentation unit 4. Pyridine production wastewater is connected to the water distribution and regulation unit 2 through an inlet pipe 5, and an inlet valve 6 is installed on the inlet pipe 5. The water distribution and regulation unit 2 is connected to the high-efficiency aerobic unit 3 through a water distribution and regulation unit outlet pipe 20, and a water distribution and regulation unit outlet valve 21 and a second centrifugal pump 22 are installed on the water distribution and regulation unit outlet pipe 20. The high-efficiency aerobic unit 3 is connected to the sludge sedimentation unit 4 through a high-efficiency aerobic unit outlet pipe 10, and a high-efficiency aerobic unit outlet valve 11 and a first centrifugal pump 12 are installed on the high-efficiency aerobic unit outlet pipe 10. An outlet pipe 13 is installed at the top of the sludge sedimentation unit 4, and an outlet valve 14 is installed on the pipe. A sludge discharge pipe 15 is installed at the bottom of the sludge sedimentation unit 4, and a sludge discharge valve 16 is installed on the pipe.

[0033] The high-efficiency aerobic unit is inoculated with high-efficiency pyridine-degrading composite bacteria. The carrier in the aerobic unit is one or a combination of biological packing rope and biological activated carbon carrier. The diameter of the biological rope is 80 mm, and the particle size of the biological carrier carbon is 200 mesh. The high-efficiency pyridine-degrading composite bacteria are immobilized on the biological packing rope and biological activated carbon carrier.

[0034] The high-efficiency aerobic device is equipped with an aeration device at the bottom, and the sludge sedimentation unit is equipped with a sludge discharge pipe.

[0035] The method of using this utility model device is as follows:

[0036] First, the pyridine-containing wastewater to be treated is introduced into the biological water distribution unit to adjust the pH of the wastewater to 6-8, which serves as a precondition for the biological reaction.

[0037] The wastewater is then fed into a high-efficiency aerobic unit, where the reaction temperature is controlled at 25-35℃, dissolved oxygen at 0.8-1.7 mg / L, and retention time at 48-96 hours.

[0038] After undergoing biological aerobic reaction, the wastewater enters the sludge sedimentation unit for sludge-water separation, achieving the goal of meeting discharge standards.

[0039] This invention utilizes highly efficient pyridine-degrading bacteria to biochemically treat pyridine in wastewater, effectively solving the problem of pyridine 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 of this invention is highly resistant to load and impact, treats pyridine wastewater rapidly, produces significant wastewater treatment results with stable effluent quality, is easy to maintain, and is suitable for industrial applications.

[0040] The following are specific examples.

[0041] A pyridine-containing wastewater sample from Jiangsu Province was selected, with a TOC of 3200 mg / L and a pyridine concentration of 5864 mg / L. The specific procedures are as follows:

[0042] Biological water distribution: Wastewater enters the water distribution and adjustment unit through pipelines to adjust the pH to 6~8;

[0043] The biochemical water distribution pump is introduced into the high-efficiency aerobic unit to carry out aerobic biochemical reactions under the action of high-efficiency pyridine-degrading compound bacteria. The reaction temperature is controlled at 25~35℃, the dissolved oxygen is 0.8~1.7 mg / L, and the residence time is 48~96h.

[0044] After treatment by the high-efficiency aerobic unit, the wastewater is pumped 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.

[0045] Under the above operating conditions, the influent TOC of the device is 3200 mg / L and the pyridine concentration is 5864 mg / L. After treatment by this device, the effluent TOC is below 63 mg / L and the pyridine concentration is 0.062 mg / L. The TOC removal rate is about 98% and the pyridine removal rate is greater than 99%.

[0046] 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 pyridine wastewater treatment device, characterized in that, The processing device includes: Tank body (1) and control box; The tank (1) includes a water distribution and regulation unit (2), a high-efficiency aerobic unit (3), and a sludge sedimentation unit (4). The water distribution regulating unit (2) is connected to the high-efficiency aerobic unit (3) through the water distribution regulating unit outlet pipe (20). The water distribution regulating unit outlet pipe (20) is equipped with a water distribution regulating unit outlet valve (21) and a second centrifugal pump (22). The high-efficiency aerobic unit (3) is connected to the sludge sedimentation unit (4) through the high-efficiency aerobic unit outlet pipe (10). The high-efficiency aerobic unit outlet pipe (10) is equipped with a high-efficiency aerobic unit outlet valve (11) and a first centrifugal pump (12). The sludge sedimentation unit (4) is equipped with an outlet pipe (13) at the top, an outlet pipe valve (14) on the pipe, and a sludge discharge pipe (15) at the bottom, with a sludge discharge valve (16) on the pipe.

2. The pyridine wastewater treatment device according to claim 1, characterized in that, The wastewater from pyridine production is connected to the water distribution and regulating unit (2) through the inlet pipe (5); an inlet pipe valve (6) is installed on the inlet pipe (5).

3. The pyridine wastewater treatment device according to claim 1, characterized in that, The tank (1) is provided with an insulation layer inside.

4. The pyridine wastewater treatment device according to claim 1, characterized in that, The water distribution and regulation unit (2), the high-efficiency aerobic unit (3) and the sludge sedimentation unit (4) are provided with chemical dosing ports at their upper ends. The chemical dosing ports are respectively the chemical dosing port (17) of the water distribution and regulation unit, the chemical dosing port (18) of the high-efficiency aerobic unit and the chemical dosing port (19) of the sludge sedimentation tank.

5. The pyridine wastewater treatment device according to claim 1, characterized in that, The high-efficiency aerobic unit (3) is equipped with an aeration pipe (7), an aeration pipe valve (8) is provided on the aeration pipe (7), and aerators (9) are evenly distributed at the bottom of the aeration pipe (7). The high-efficiency aerobic unit is inoculated with high-efficiency pyridine-degrading composite bacteria. The carrier in the high-efficiency aerobic unit is 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 high-efficiency pyridine-degrading composite bacteria are immobilized on the biological packing rope and the biological activated carbon carrier.

6. The pyridine wastewater treatment device according to claim 1, characterized in that, The high-efficiency aerobic unit (3) and the sludge settling unit (4) are connected by a pipeline. The pipeline is equipped with a high-efficiency aerobic unit outlet valve (11) and a first centrifugal pump (12). The pipeline inlet is relatively close to the bottom of the high-efficiency aerobic unit (3) to prevent some of the sludge that has not been aerated from accumulating and settling.

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

8. The pyridine wastewater treatment device according to claim 1, characterized in that, The control box is connected to the inlet pipe valve (6), aeration pipe valve (8), high-efficiency aerobic unit outlet valve (11), outlet pipe valve (14), sludge discharge valve (16), water distribution regulating unit outlet valve (21), first centrifugal pump (12), and second centrifugal pump (22) via wiring. Each valve and centrifugal pump can be controlled individually by a switch.

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