Sewage treatment test device and method based on ultrasonic enhancement

Abstract

The invention provides a sewage treatment test device and method based on ultrasonic enhancement. The device comprises a treatment pond, a stirrer is arranged in the middle of the treatment pond, one side of the upper end of the treatment pond is constructed to be an ultrasonic treatment area, the other side of the upper end of the treatment pond is constructed to be a liquid outlet, and a water outlet pump is arranged on the liquid outlet; the device further comprises an ultrasonic generator, the ultrasonic probe is connected with the ultrasonic generator and located in the ultrasonic treatment area, a backflow pipe is further arranged in the treatment pond and communicated to the ultrasonic treatment area from the bottom of the treatment pond, and a backflow pump is arranged on the backflow pipe. The influence and mechanism of ultrasonic waves on sewage treatment can be quantitatively researched, various settings of the ultrasonic waves in the sewage treatment can be quantitatively controlled, and the application effect of the ultrasonic waves in the sewage treatment is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of sewage treatment, and relates to a sewage treatment test device and method based on ultrasonic enhancement. Background Art

[0002] Biological treatment of sewage has the advantages of large treatment capacity, low cost, simple and feasible technology, but it is currently facing the challenges of increasing sewage volume, complexity, difficulty in degradation and high toxicity. Ultrasound is an elastic wave in physical media and a form of physical energy. In recent years, ultrasound has achieved remarkable results in the field of sewage treatment alone or in combination with other technologies. Ultrasonic technology has unique advantages in the field of biological treatment of sewage. On the one hand, ultrasound can be used to indirectly enhance biological treatment, pre-treat sewage, degrade refractory substances, improve the biodegradability of sewage, or ultrasonically release carbon from return sludge to provide energy for the biological treatment process; on the other hand, ultrasound directly acts on biological treatment equipment to enhance sludge activity and improve biological treatment efficiency. The use of ultrasound for the pretreatment of refractory substances in sewage and its combination with biological treatment of sewage are of great significance to improving the effect and efficiency of sewage treatment. Summary of the invention

[0003] The purpose of the present invention is to provide a sewage treatment test device and method based on ultrasonic enhancement in view of the defects of the prior art. The device and method can quantitatively study the influence and mechanism of ultrasound on sewage treatment, quantitatively control various settings of ultrasound in sewage treatment, and improve the application effect of ultrasound in sewage treatment.

[0004] The first aspect of the present invention provides a sewage treatment test device based on ultrasonic enhancement, including a treatment tank, an agitator is provided in the middle of the treatment tank, one side of the upper end of the treatment tank is configured as an ultrasonic treatment zone, the ultrasonic treatment zone is provided with a liquid inlet, and the other side is configured as a liquid outlet, and a water outlet pump is provided on the liquid outlet; it also includes an ultrasonic generator and an ultrasonic probe, the ultrasonic probe is connected to the ultrasonic generator, the ultrasonic probe is located in the ultrasonic treatment zone, and there is also a reflux pipe in the treatment tank, the reflux pipe is connected from the bottom of the treatment tank to the ultrasonic treatment zone, and a reflux pump is provided on the reflux pipe.

[0005] Preferably, an aeration pipe is connected to the bottom of the treatment pool, and the aeration pipe is used to aerate the treatment pool.

[0006] Preferably, the treatment tank is made of plexiglass.

[0007] Preferably, the reflux pipe is made of organic glass or stainless steel.

[0008] The second aspect of the present invention provides a method for using a sewage treatment test method based on ultrasonic enhancement, using any of the above-mentioned sewage treatment test devices based on ultrasonic enhancement, specifically comprising: Glucose was used as the carbon source and ibuprofen as the difficult-to-degrade substance to simulate sewage. COD was controlled at 500 mg / L and BOD5 / COD was 0.1. The sludge in the treatment pool was taken from the sewage treatment plant and had been domesticated. The initial sludge load after domestication was 0.18 kgCOD / (kg MLSS·d). The domesticated sludge was spread on the bottom of the treatment pool and then tested according to the following method. The test was divided into the following three stages: The first stage: The first stage is the operation stage, during which the ultrasonic generator and the reflux pump are not turned on; The second stage: The second stage is the water inlet stage. During the water inlet stage, the ultrasonic generator is turned on and the ultrasonic output power is set to 600 W (2 W / mL). After the water inlet is completed, the ultrasonic generator is turned off; The third stage: The third stage is the aeration stage. After the second stage is completed, the treatment pool is aerated and the ultrasonic generator is turned on again. The ultrasonic output power is set to 60 W (0.2 W / mL). At the same time, the reflux pump is turned on and the reflux flow rate is controlled to 100 mL / min. After 10-15 minutes, the ultrasonic generator and reflux pump are turned off. In the above three stages, water samples from the ultrasonic reaction area after the water inlet and effluent samples from the drainage stage are collected every day for COD and BOD5 tests.

[0009] Priority will be given to the first phase, which will run for 10 days, the second phase, which will run for 15 days, and the third phase, which will run for 30 days.

[0010] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a sewage treatment test device and method based on ultrasonic enhancement. The device and method can quantitatively study the influence and mechanism of ultrasound on sewage treatment, quantitatively control various settings of ultrasound in sewage treatment, and improve the application effect of ultrasound in sewage treatment.

[0011] The invention provides a sewage treatment test device and method based on ultrasonic enhancement, which verifies that the biodegradability of sewage is improved through ultrasonic pretreatment; the biological activity of sludge inside the treatment tank is improved by ultrasonic treatment, and the sludge load of the treatment tank is increased; at the same time, the pretreatment of difficult-to-biodegrade wastewater and the enhancement of sludge activity are achieved through a single ultrasonic device. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the invention.

[0013] In the figure: 1. ultrasonic generator; 2. ultrasonic probe; 3. ultrasonic reaction zone 3; 4. water inlet pump; 5. reflux pump; 6. reflux pipe; 7. agitator; 8. aeration device; 9. water outlet pump; 10. treatment tank. DETAILED DESCRIPTION

[0014] In order to enable those skilled in the art to better understand the technical solution of the present invention, the preferred implementation scheme of the present invention is described below in conjunction with specific embodiments. However, it should be understood that the drawings are only used for exemplary descriptions and cannot be understood as limitations on this patent; in order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted; the positional relationship described in the drawings is only used for exemplary descriptions and cannot be understood as limitations on this patent.

[0015] As an embodiment of the present invention, see the attached Figure 1 The present embodiment provides a sewage treatment test device and method based on ultrasonic enhancement, including a treatment pool 10, wherein a stirrer 7 is provided in the middle of the treatment pool 10, one side of the upper end of the treatment pool 10 is configured as an ultrasonic treatment zone 3, wherein the ultrasonic treatment zone 3 is provided with a liquid inlet, and a water inlet pump 4 is provided on the liquid inlet, and the other side is configured as a liquid outlet, and a water outlet pump 9 is provided on the liquid outlet; the treatment pool 10 also includes an ultrasonic generator 1 and an ultrasonic probe 2, wherein the ultrasonic probe 2 is connected to the ultrasonic generator 1, and the ultrasonic probe 2 is located in the ultrasonic treatment zone 3, and the treatment pool 10 also includes a reflux pipe 6, wherein the reflux pipe 6 is connected from the bottom of the treatment pool 10 to the ultrasonic treatment zone 3, and a reflux pump 5 is provided on the reflux pipe 6.

[0016] In some preferred embodiments, in order to further improve the treatment efficiency and effect, an aeration pipe is also connected to the bottom of the treatment pool 10 in this embodiment. The aeration pipe is used to aerate the treatment pool, and the aeration pipe is connected to the aeration device 8.

[0017] In some preferred embodiments, in order to facilitate direct observation of sewage during the treatment process and to achieve intuitive judgment visible to the naked eye, the treatment tank 10 in this embodiment is made of organic glass.

[0018] In other embodiments, in order to facilitate observation, the reflux pipe 6 is made of organic glass. Of course, in order to improve the anti-corrosion performance, the reflux pipe 6 can also be made of stainless steel.

[0019] As another preferred embodiment of the present invention, this embodiment provides a method for using a sewage treatment test method based on ultrasonic enhancement, using any of the above-mentioned sewage treatment test devices based on ultrasonic enhancement, specifically comprising: Glucose was used as the carbon source and ibuprofen as the difficult-to-degrade substance to simulate sewage. COD was controlled at 500 mg / L and BOD5 / COD was 0.1. The sludge in the treatment pool was taken from the sewage treatment plant and had been domesticated. The initial sludge load after domestication was 0.18 kgCOD / (kg MLSS·d). The domesticated sludge was spread on the bottom of the treatment pool and then tested according to the following method. The test was divided into the following three stages: The first stage: The first stage is the operation stage, during which the ultrasonic generator and the reflux pump are not turned on; The second stage: The second stage is the water inlet stage. During the water inlet stage, the ultrasonic generator is turned on and the ultrasonic output power is set to 600 W (2 W / mL). After the water inlet is completed, the ultrasonic generator is turned off; The third stage: The third stage is the aeration stage. After the second stage is completed, the treatment pool is aerated and the ultrasonic generator is turned on again. The ultrasonic output power is set to 60 W (0.2 W / mL). At the same time, the reflux pump is turned on and the reflux flow rate is controlled to 100 mL / min. After 10-15 minutes, the ultrasonic generator and reflux pump are turned off. In the above three stages, water samples from the ultrasonic reaction area after the water inlet and effluent samples from the drainage stage are collected every day for COD and BOD5 tests.

[0020] In some preferred embodiments, the first phase runs for 10 days, the second phase runs for 15 days, and the third phase runs for 30 days.

[0021] The specific cases are as follows: In a specific simulation test, the simulated sewage used glucose as the carbon source and ibuprofen as the difficult-to-degrade substance. The COD was controlled at about 500 mg / L and the BOD5 / COD was about 0.1.

[0022] The sludge in the treatment pool was taken from a sewage treatment plant and had been domesticated. During the domestication process, the amount of treated water and the concentration of ibuprofen were continuously adjusted. The domesticated sludge had adapted to the wastewater containing ibuprofen, and the initial sludge load was 0.18 kg COD / (kgMLSS·d).

[0023] The whole experiment was divided into three stages. The first stage lasted 10 days. During the operation stage, the ultrasonic generator 1 and the reflux pump 5 were not turned on. The second stage lasted 15 days. During the water inflow stage of the treatment pool, the ultrasonic generator 1 was turned on and the ultrasonic output power was set to 600 W (2 W / mL). After the water inflow was completed, the ultrasonic generator 1 was turned off. The third stage lasted 30 days. Based on the operation of the second stage, during the aeration stage of the treatment pool, the ultrasonic generator 1 was turned on again and the ultrasonic output power was set to 60 W (0.2 W / mL). At the same time, the reflux pump 5 was turned on and the flow rate was set to 100 mL / min. After 10-15 min, the ultrasonic generator and the reflux pump were turned off.

[0024] During the test, water samples from the ultrasonic reaction area after the water inlet and effluent samples from the drainage stage were collected every day for COD and BOD5 tests.

[0025] The main operating data of the treatment pool are shown in the table. According to the test record data, after the second stage of ultrasonic treatment of the influent, the influent BOD5 / COD increased from 0.09 to 0.31, the biodegradability was improved, and the sludge load increased from 0.06 kg COD / (kg MLSS·d) to 0.25 kg COD / (kg MLSS·d). In the third stage, ultrasonic enhancement of the sludge activity in the treatment pool was added, and the sludge load increased to 0.32 kg COD / (kg MLSS·d).

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A sewage treatment test based on ultrasonic enhancement, characterized in that: It includes a treatment pool, wherein an agitator is provided in the middle of the treatment pool, one side of the upper end of the treatment pool is configured as an ultrasonic treatment zone, the ultrasonic treatment zone is provided with a liquid inlet, and the other side is configured as a liquid outlet, and a water outlet pump is provided on the liquid outlet; it also includes an ultrasonic generator and an ultrasonic probe, the ultrasonic probe is connected to the ultrasonic generator, the ultrasonic probe is located in the ultrasonic treatment zone, and there is also a reflux pipe in the treatment pool, the reflux pipe is connected from the bottom of the treatment pool to the ultrasonic treatment zone, and a reflux pump is provided on the reflux pipe.

2. The sewage treatment test device based on ultrasonic enhancement according to claim 1 is characterized in that: The bottom of the treatment pool is also connected to an aeration pipe, and the aeration pipe is used to aerate the treatment pool.

3. A sewage treatment test device based on ultrasonic enhancement according to claim 2, characterized in that: The treatment tank is made of organic glass.

4. The sewage treatment test device based on ultrasonic enhancement according to claim 2 is characterized in that: The reflux pipe is made of organic glass or stainless steel.

5. A sewage treatment test method based on ultrasonic enhancement, characterized in that: A sewage treatment test device based on ultrasonic enhancement according to any one of claims 2 to 4, specifically comprising: Glucose was used as the carbon source and ibuprofen as the difficult-to-degrade substance to simulate sewage. COD was controlled at 500 mg / L and BOD5 / COD was 0.

1. The sludge in the treatment pool was taken from the sewage treatment plant and had been domesticated. The initial sludge load after domestication was 0.18 kgCOD / (kg MLSS·d). The domesticated sludge was spread on the bottom of the treatment pool and then tested according to the following method. The test was divided into the following three stages: The first stage: The first stage is the operation stage, during which the ultrasonic generator and the reflux pump are not turned on; The second stage: The second stage is the water inlet stage. During the water inlet stage, the ultrasonic generator is turned on and the ultrasonic output power is set to 600 W (2 W / mL). After the water inlet is completed, the ultrasonic generator is turned off; The third stage: The third stage is the aeration stage. After the second stage is completed, the treatment pool is aerated and the ultrasonic generator is turned on again. The ultrasonic output power is set to 60 W (0.2 W / mL). At the same time, the reflux pump is turned on and the reflux flow rate is controlled to 100 mL / min. After 10-15 minutes, the ultrasonic generator and reflux pump are turned off. In the above three stages, water samples from the ultrasonic reaction area after the water inlet and effluent samples from the drainage stage are collected every day for COD and BOD5 tests.

6. The sewage treatment test method based on ultrasonic enhancement according to claim 4 is characterized in that: The first phase will run for 10 days, the second phase will run for 15 days, and the third phase will run for 30 days.

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