Novel catalytic oxidation and biochemical combined wastewater treatment integrated device

Abstract

The utility model relates to a novel catalytic oxidation and biochemical combined wastewater treatment integrated device, which comprises a catalytic ozonation device, an adjusting tank, a tank A and a tank O. The catalytic ozonation device comprises a catalytic ozonation shell, a water inlet pipe and a gas inlet pipe are respectively arranged on the lower portion of the catalytic ozonation shell, and a water outlet pipe is arranged on the lower portion of the catalytic ozonation shell. A first bearing sieve plate is arranged in the catalytic ozonation shell and located above the water inlet pipe and the air inlet pipe, a catalyst is arranged on the first bearing sieve plate, an air outlet pipe and a first water passing pipe are arranged on the upper portion of the catalytic ozonation shell, the first water passing pipe is communicated with the adjusting tank, and a perforated aeration pipe is arranged at the bottom in the adjusting tank. A second water passing pipe is arranged on the upper portion of the adjusting tank and communicated with the tank A. A second bearing sieve plate is arranged in the tank A. A biological carrier is arranged on the second bearing sieve plate. A third water passing pipe is arranged on the lower portion of the tank A. The third water passing pipe is located below the second bearing sieve plate and communicated with the tank O. A micropore aerator is arranged at the bottom in the tank O. And a water outlet pipe is arranged above the tank O. The device disclosed by the utility model has the advantages of high treatment efficiency, small occupied area and low cost.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a novel integrated wastewater treatment device that combines catalytic oxidation and biochemical processes. Background Technology

[0002] With the rapid development of my country's chemical industry and the increasing number of chemical enterprises, coupled with high water consumption and the generation of diverse types of chemical wastewater, chemical production wastewater poses a significant threat to human health and the natural environment. There are generally three methods for treating chemical wastewater: physicochemical, chemical, and biological methods. Compared to physicochemical and chemical methods, biological methods offer better wastewater treatment results and can effectively reduce costs. However, pharmaceutical and chemical wastewater is characterized by significant fluctuations in water quality, complex composition, and high toxicity, which can inhibit microbial activity, reduce treatment efficiency, and affect effluent quality. Utility Model Content

[0003] To address the aforementioned technical problems in the background art, this utility model provides a novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes, which has the advantages of high treatment efficiency, small footprint, and low cost.

[0004] The technical solution of this utility model is as follows: This utility model relates to a novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes. Its special feature is that the novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes includes an ozone catalytic oxidation device, an equalization tank, an A tank, and an O tank. The ozone catalytic oxidation device includes an ozone catalytic oxidation shell. A water inlet pipe and an air inlet pipe are respectively installed in the lower part of the ozone catalytic oxidation shell. A first supporting screen plate is installed inside the ozone catalytic oxidation shell, and the first supporting screen plate is located above the water inlet pipe and the air inlet pipe. A catalyst is installed on the first supporting sieve plate. An air outlet pipe and a first water passage pipe are respectively installed on the upper part of the ozone catalytic oxidation shell. The first water passage pipe is connected to the equalization tank. A perforated aeration pipe is installed at the bottom of the equalization tank. A second water passage pipe is installed at the top of the equalization tank and is connected to tank A. A second supporting sieve plate is installed in tank A, and a biological carrier is installed on the second supporting sieve plate. A third water passage pipe is installed at the bottom of tank A, below the second supporting sieve plate, and is connected to tank O. A microporous aerator is installed at the bottom of tank O, and an outlet pipe is installed at the top of tank O.

[0005] Furthermore, a safety valve is installed on the air outlet pipe, and a pressure reducing valve is installed on the first water pipe.

[0006] Furthermore, a first row of sludge pipes is installed in the lower part of pool A, and a first row of sludge outlets is correspondingly installed in the lower part of pool A. The first row of sludge pipes is connected to the first row of sludge outlets.

[0007] Furthermore, a second row of sludge pipes is installed in the middle of the O pool, and a second row of sludge outlets is correspondingly installed in the middle of the O pool. The second row of sludge pipes is connected to the second row of sludge outlets.

[0008] Furthermore, an aeration inlet is provided at the bottom of the regulating tank corresponding to the perforated aeration pipe, and the perforated aeration pipe is connected to the aeration inlet.

[0009] Furthermore, EMO complex microorganisms and carriers were added to both pool A and pool O.

[0010] Furthermore, the catalyst is a rare earth catalyst.

[0011] This invention increases the biodegradability and reduces the toxicity of wastewater through an ozone catalytic oxidation device. Employing an EMO composite microbial A / O biological treatment system, the influent COD is controlled below 8000 mg / L, and the influent total nitrogen is controlled below 300 mg / L. The effluent COD is ≤500 mg / L, and the effluent total nitrogen is ≤50 mg / L, meeting industrial wastewater discharge standards. Engineering practice demonstrates the stability and operability of this process. Therefore, this invention has the following advantages:

[0012] 1) Ozone catalytic oxidation devices can decompose toxic and harmful substances in wastewater;

[0013] 2) The EMO complex microorganisms are diverse and abundant, can adapt to toxic environments, and can cooperate and exert their full strength, so that the decomposition of various organic substances that are extremely complex and difficult to handle can be completed smoothly.

[0014] 3) Combining the two methods, ozone catalytic oxidation improves the biodegradability of wastewater, increases the stability of biological treatment, and improves treatment efficiency;

[0015] 4) The integrated device occupies less space and has a lower investment cost. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the present invention.

[0018] The annotations in the attached figures are explained as follows:

[0019] 1. Safety valve; 2. Air outlet pipe; 3. Ozone catalytic oxidation device; 4. First water passage pipe; 5. Second water passage pipe; 6. Pool A; 7. Pool O; 8. Water outlet pipe; 9. Second sludge discharge pipe; 10. Microporous aerator; 11. First sludge discharge pipe; 12. Equalization tank; 13. Perforated aeration pipe; 14. Air inlet pipe; 15. Water inlet pipe; 16. First supporting screen plate; 17. Catalyst; 18. Pressure reducing valve; 19. Biological carrier; 20. Second supporting screen plate; 21. Third water passage pipe; 22. Aeration inlet; 23. First sludge discharge port; 24. Second sludge discharge port. Detailed Implementation

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] See Figure 1 , 2 The structure of this utility model embodiment includes an ozone catalytic oxidation device 3, an equalization tank 12, an A tank 6, and an O tank 7. The ozone catalytic oxidation device 3 includes an ozone catalytic oxidation shell. A water inlet pipe 15 and an air inlet pipe 14 are respectively arranged in the lower part of the ozone catalytic oxidation shell. A first supporting screen plate 16 is arranged inside the ozone catalytic oxidation shell, located above the water inlet pipe 15 and the air inlet pipe 14. A catalyst 17 is arranged on the first supporting screen plate 16, which has multiple sieve holes for wastewater to pass through. The sieve hole diameter is smaller than the particle size of the catalyst 17 to prevent the catalyst 17 from falling off the first supporting screen plate 16. The catalyst 17 is specifically a rare earth catalyst. An air outlet pipe 2 and a first water passage pipe 4 are respectively arranged in the upper part of the ozone catalytic oxidation shell. The first water passage pipe 4 is connected to the equalization tank 12. A safety valve 1 is installed on the air outlet pipe 2, and a pressure reducing valve 18 is installed on the first water passage pipe 4. A perforated aeration pipe 13 is installed at the bottom of the equalization tank 12, and an aeration inlet 22 is installed at the bottom of the equalization tank 12 corresponding to the perforated aeration pipe 13. The perforated aeration pipe 13 is connected to the aeration inlet 22. The function of the equalization tank 12 is to buffer and regulate wastewater. A second water passage pipe 5 is installed at the top of the equalization tank 12, and the second water passage pipe 5 is connected to tank A 6. A second supporting screen plate 20 is installed in tank A 6, and a biological carrier 19 is installed on the second supporting screen plate 20. The second supporting screen plate 20 has multiple screen holes arranged to allow wastewater to pass through. The pore size of the screen holes is smaller than the particle size of the biological carrier 19 to prevent the biological carrier 19 from falling off the second supporting screen plate 20. A third water passage pipe 21 is installed at the bottom of tank A 6, located below the second supporting screen plate 20 and connected to tank O 7. A microporous aerator 10 is installed at the bottom of tank O 7, and an outlet pipe 8 is installed at the top of tank O 7. A first sludge pipe 11 is installed in the lower part of pool A 6, and a first sludge outlet 23 is correspondingly installed in the lower part of pool A 6. The first sludge pipe 11 is connected to the first sludge outlet 23. A second sludge pipe 9 is installed in the middle of pool O 7, and a second sludge outlet 24 is correspondingly installed in the middle of pool O 7. The second sludge pipe 9 is connected to the second sludge outlet 24.

[0022] During operation, a rare earth catalyst is added to the ozone catalytic oxidation device 3. A safety valve 1 is installed on the gas outlet pipe 2 at the top of the ozone catalytic oxidation device 3, and a pressure reducing valve 18 is installed on the first water pipe 4. The pressure inside the ozone catalytic oxidation shell is controlled at 0.4 MPa through the safety valve 1 and the pressure reducing valve 18. Ozone is introduced through inlet pipe 14. Under high pressure and catalysis by catalyst 17, ozone oxidizes and decomposes recalcitrant toxic and harmful substances in the wastewater. After ozone catalytic oxidation, the wastewater enters the equalization tank 12 through the first water passage pipe 4. Simultaneously, air is introduced into the equalization tank 12 through aeration inlet 22 and perforated aeration pipe 13 to stir the water and adjust the pH of the wastewater in the equalization tank 12 to 6-8. After the wastewater is evenly mixed in the equalization tank 12, it flows into tank A 6 through the second water passage pipe 5 at the top of the tank. The wastewater flows from top to bottom through biological carrier 19 and into tank O 7 through the third water passage pipe 21 at the bottom of tank A 6. At the same time, air is introduced into the microporous aerator 10 installed in tank O 7 through the air inlet pipe. After aerobic treatment in tank O 7, the wastewater meets the discharge standards and is discharged through outlet pipe 8. Biological carrier 19 and EMO high-efficiency compound microorganisms are added to tank A 6 and tank O 7, and the EMO compound microorganisms and carriers only need to be added once.

[0023] The ozone catalytic oxidation device 3 of this invention combines the strong oxidizing properties of ozone with the adsorption and catalytic characteristics of a catalyst, effectively solving the problem of incomplete degradation of organic matter. The ozone catalytic oxidation device 3 utilizes a solid catalyst to accelerate the oxidation reaction in the liquid phase under high pressure. The hydroxyl radicals (·OH) generated by ozone under the action of the catalyst react with organic matter, completely decomposing it. Hydroxyl radicals can react with most organic matter (and some inorganic matter) in water, exhibiting characteristics such as fast reaction rate and non-selectivity. The catalyst exists in a solid state, making it easy to separate from water and resulting in minimal secondary pollution.

[0024] Organic matter + hydroxyl radical ·OH → CO2 + H2O

[0025] The specific catalytic reaction mechanism is as follows:

[0026] 1) Organic matter is chemically adsorbed on the surface of the catalyst to form surface chelates with certain nucleophilicity. Then ozone or hydroxyl radicals react with it to form an oxidation reaction. The intermediate products formed are further oxidized on the surface, or may be desorbed into the solution and further oxidized.

[0027]

[0028] 2) Catalysts can not only adsorb organic matter, but also directly react with ozone in a redox reaction. The resulting oxidized metals and hydroxyl radicals can directly oxidize organic matter.

[0029]

[0030] 3) The catalyst catalyzes the decomposition of ozone, producing a more active oxidant, which then reacts with non-chemically adsorbed organic molecules.

[0031] The EMO compound microorganisms in this invention require only a single addition, eliminating the need for supplementary acclimatization and rejuvenation. This invention incorporates biological carrier immobilization technology; the microbial carrier increases the contact area between the microorganisms and organic pollutants in the wastewater, while also providing a buffering effect. Simultaneously, the proprietary microbial carrier has a specific gravity, ensuring sufficient microbial quantity and preventing carrier loss.

[0032] The content of this utility model and the technical content not specifically described in the above embodiments are the same as the prior art.

[0033] The above are merely specific embodiments disclosed in this utility model, but the scope of protection disclosed in this utility model is not limited thereto. The scope of protection disclosed in this utility model shall be determined by the scope of protection of the claims.

Claims

1. A novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes, characterized in that: The novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes includes an ozone catalytic oxidation unit, an equalization tank, an A tank, and an O tank. The ozone catalytic oxidation unit includes an ozone catalytic oxidation shell. The lower part of the shell is equipped with a water inlet pipe and an air inlet pipe. A first supporting screen plate is installed inside the shell, located above the water inlet pipe and the air inlet pipe. A catalyst is placed on the first supporting screen plate. An air outlet pipe and a first water passage pipe are installed on the upper part of the shell, connected to the equalization tank. A perforated aeration pipe is installed at the bottom of the equalization tank. A second water passage pipe is installed at the upper part of the equalization tank, connected to the A tank. A second supporting screen plate is installed inside the A tank, with a biological carrier placed on it. A third water passage pipe is installed at the lower part of the A tank, below the second supporting screen plate and connected to the O tank. A microporous aerator is installed at the bottom of the O tank. An outlet pipe is installed at the upper part of the O tank.

2. The novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes according to claim 1, characterized in that: A safety valve is installed on the air outlet pipe, and a pressure reducing valve is installed on the first water pipe.

3. The novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes according to claim 2, characterized in that: A first sludge discharge pipe is provided in the lower part of pool A, and a first sludge discharge outlet is provided in the lower part of pool A. The first sludge discharge pipe is connected to the first sludge discharge outlet.

4. The novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes according to claim 3, characterized in that: A second sludge pipe is provided in the middle of the O pool, and a second sludge outlet is provided in the middle of the O pool. The second sludge pipe is connected to the second sludge outlet.

5. The novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes according to claim 4, characterized in that: The bottom of the regulating tank is provided with an aeration inlet corresponding to the perforated aeration pipe, and the perforated aeration pipe is connected to the aeration inlet.

6. The novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes according to any one of claims 1 to 5, characterized in that: Both pool A and pool O contain EMO complex microorganisms and carriers.

7. The novel integrated wastewater treatment device combining catalytic oxidation and biochemical processes according to claim 6, characterized in that: The catalyst is a rare earth catalyst.

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