CN216427006U

CN216427006U - Wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology

Info

Publication number: CN216427006U
Application number: CN202121838141.2U
Authority: CN
Inventors: 中原康; 徐芙清; 田汪洋; 车磊; 杨国英
Original assignee: Zhe Jiang Eco Environmental Technology Co ltd
Current assignee: Zhe Jiang Eco Environmental Technology Co ltd
Priority date: 2021-08-07
Filing date: 2021-08-07
Publication date: 2022-05-03
Anticipated expiration: 2031-08-07

Abstract

The utility model relates to the technical field of pollution treatment, in particular to a wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology. This little nanometer bubble of ozone oxidation combines biotechnology's effluent disposal system includes the ozone oxidation district, and the ozone oxidation district is the pipe arrangement and is connected with the three-phase separator, and the ozone oxidation district is equipped with catalytic module, and the ozone oxidation district sets up ozone generator and little nanometer bubble generator, sets up the biological reaction district behind the ozone oxidation district. The utility model improves the treatment efficiency of the wastewater, especially the treatment efficiency of organic matters, by combining the ozone micro-nano bubble oxidation and the biotechnology.

Description

Wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology

Technical Field

The utility model relates to the technical field of pollution treatment, in particular to a wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology.

Background

In the pyrolysis treatment process and system for the oily sludge, pyrolysis desorption gas is sprayed and then enters a three-phase separator, and wastewater obtained by separation can reach the standard and be discharged after being treated. The wastewater contains oil, ammonia nitrogen, organic matters, solid suspended matters and other pollutants, and because the wastewater has special components and is greatly influenced by conditions such as the property of oily sludge, process parameters and the like, a set of unified treatment system for treating the wastewater does not exist at present.

The ozone has the advantages of strong oxidizing ability, high reaction speed, no secondary pollution and the like, so the ozone has good application prospect in the advanced treatment of sewage. But on the other hand, the ozone mass transfer efficiency and the oxidation efficiency are low under the traditional aeration mode.

The micro-nano bubbles are bubbles between micro bubbles (the diameter is 10-50 μm) and nano bubbles (the diameter is less than 200 nm). Compared with the traditional large bubble (the diameter is more than 50 mm) and small bubble (the diameter is less than 5 mm), the micro-nano bubble has the advantages of long retention time, high mass transfer efficiency, large specific surface area, spontaneous generation of free radicals and the like.

The ozone and micro-nano bubble technology can overcome the limitation of ozone in sewage treatment, improve the mass transfer rate of ozone, excite to generate a large amount of hydroxyl radicals and enhance the oxidation capacity of ozone. Chinese patent document CN 112694165 a discloses an ozone catalytic oxidation reaction apparatus system, which mainly utilizes an ozone micro-nano bubble technology and an ozone catalytic oxidation technology to treat wastewater. However, the above-mentioned apparatus is not suitable for the wastewater after three-phase separation because the wastewater after three-phase separation has a high organic content and ozone has selectivity for oxidation of organic substances.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provides a wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology, so that organic wastewater generated by spraying pyrolysis desorption gas can be treated with higher quality and higher efficiency.

In order to achieve the purpose, the technical scheme of the utility model is as follows:

the wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology comprises an ozone oxidation area, wherein an ozone generator and a micro-nano bubble generator are arranged in the ozone oxidation area, and a biological reaction area is arranged behind the ozone oxidation area.

The inventive concept of the utility model is that: aiming at the characteristics of high organic content and oil content of wastewater from a three-phase separation device, a wastewater treatment system capable of efficiently degrading pollutants, especially organic matters is provided. After the wastewater passes through the ozone oxidation zone, macromolecular organic matters in the wastewater are oxidized into micromolecular organic matters, and the micromolecular organic matters can be used as substrates to be metabolized and utilized by organisms in a subsequent biological reaction zone.

As a refinement, the ozonation zone is connected to a three-phase separator.

As a modification, a pH adjusting region is arranged between the ozone oxidation region and the three-phase separator, and the purpose of the pH adjusting region is to adjust the pH of the wastewater to be alkaline, and under the alkaline condition, hydroxide ions can promote the ozone to decompose hydroxyl radicals. The pH adjusting region adopts one or more of sodium hydroxide, calcium hydroxide and potassium hydroxide.

As an improvement, the ozone oxidation zone is arranged in a pipeline, the pipeline arrangement can reduce the occupied area compared with a reaction tank or a reaction tank, and the ozone and the wastewater flow together to ensure that the ozone and the wastewater are mixed more fully.

As an improvement, the ozone oxidation area is provided with a catalytic module, the catalytic module is attached to the inner wall of the ozone oxidation area in a tubular shape, and ozone can generate more hydroxyl radicals under the catalytic action of the catalytic module, so that the oxidation reaction speed and the degradation degree are accelerated, and organic matters which are difficult to degrade are effectively removed.

As a further improvement, the catalytic module selects the activated carbon with a porous structure, and the activated carbon has a large specific surface area and good adsorption performance and also has certain catalytic activity.

As an improvement, the ozone oxidation zone is connected with the biological reaction zone through a buffer tube, and the buffer tube is arranged so that redundant ozone can be decomposed into oxygen to avoid the influence of the redundant ozone on the subsequent biological reaction zone.

As an improvement, a sponge carrier is laid in the biological reaction zone, the sponge carrier can provide an aerobic zone and an anaerobic zone, and the dissolved oxygen on the surface of the sponge carrier is high, so that aerobic bacteria on the surface of the sponge carrier have strong activity; inside the sponge carrier, because the stimulation of micro-nano bubble, inside waste water immerses the carrier more easily, the inside dissolved oxygen content of carrier is low, therefore the activity of the inside anaerobe of sponge carrier also can strengthen.

As an improvement, the biological reaction zone is provided with an aeration device, so that the content of dissolved oxygen in water is increased, and the mixed solution is in a violent stirring state.

In conclusion, the device has the advantages of simple structure and small occupied area, and can improve the treatment efficiency of wastewater, particularly the treatment efficiency of organic matters, by combining the ozone micro-nano bubble oxidation and the biotechnology.

Drawings

FIG. 1 is a schematic flow diagram of the present invention;

FIG. 2 is a schematic view of the structure of an ozone oxidation zone in the present invention;

FIG. 3 is a schematic view showing the structure of a biological reaction zone in the present invention.

In the figure: 10. an ozone oxidation zone; 11. a catalytic module; 20. a biological reaction zone; 21. a sponge carrier; 22. a sponge holder; 23. a water inlet pipe; 24. a water outlet; 30. a micro-nano bubble generator; 40. an aeration device; 41. an aeration pipe.

Detailed Description

Example 1

As shown in fig. 1, the main body of the wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology of the present invention is an ozone oxidation zone 10 and a biological reaction zone 20, the front end of the ozone oxidation zone 10 is connected to an ozone generator and a micro-nano bubble generator 30, the front end of the ozone oxidation zone 10 receives wastewater from a three-phase separator, a pH adjustment zone is disposed between the ozone oxidation zone 10 and the three-phase separator, and the rear end of the ozone oxidation zone is connected to the biological reaction zone 20.

The wastewater from the three-phase separator is first passed into a pH adjustment zone to adjust the pH of the wastewater to alkaline, since under alkaline conditions, hydroxyl ions can promote the decomposition of hydroxyl radicals by ozone.

The ozone generator generates ozone by a high-voltage discharge method, detects the concentration of gas-phase ozone, ozone gas enters the micro-nano bubble generator 30 to generate micro-nano bubbles containing ozone gas after the concentration of the gas-phase ozone is stable, and then the micro-nano bubbles containing the ozone gas and wastewater after pH adjustment interact in the ozone oxidation zone 10. As shown in fig. 2, the ozone oxidation area 10 is arranged in a pipeline shape and is provided with a catalytic module 11, the catalytic module 11 is attached to the inner wall of the ozone oxidation area in a tubular shape, activated carbon is filled in the catalytic module 11, micro-nano bubbles containing ozone gas and wastewater flow in the pipeline, so that the micro-nano bubbles and the wastewater are fully mixed, ozone is decomposed into hydroxyl radicals under the catalytic action of the catalytic module 11, and the hydroxyl radicals oxidize organic matters in the wastewater. Ozone oxidation zone 10 can be increased in length as needed to control the residence time of the wastewater.

After the wastewater has been reacted in ozonation zone 10, it enters bioreaction zone 20 via the buffer tubes. The buffer tube may be in the form of a coil to allow the excess ozone to decompose into oxygen, preventing the excess ozone from affecting the activity of microorganisms in the subsequent bioreaction zone.

As shown in FIG. 3, the buffer tube is in communication with an inlet tube 23, and wastewater enters the bioreaction zone 20 through the inlet tube 23. The biological reaction zone 20 is internally laid with a sponge carrier 21, the sponge carrier 21 can provide an aerobic zone and an anaerobic zone for aerobic bacteria and anaerobic bacteria to live and breed, and the sponge carrier 21 is fixed on a sponge bracket 22. The biological reaction zone 20 is provided with an aeration device 40, an aeration pipe 41 of the aeration device 40 is positioned at the bottom of the biological reaction zone 20 to increase the content of dissolved oxygen in water and enable the mixed liquid to be in a violent stirring state, pollutants are further decomposed under the action of microorganisms, and the treated water body is discharged from a water outlet 24 of the biological reaction zone.

Claims

1. Ozone micro-nano bubble oxidation combines biotechnology's effluent disposal system, including ozone oxidation zone, ozone oxidation zone sets ozone generator and micro-nano bubble generator, its characterized in that: a biological reaction zone is arranged behind the ozone oxidation zone.

2. The ozone micro-nano bubble oxidation and biotechnology combined wastewater treatment system of claim 1, wherein: the ozone oxidation zone is connected with the three-phase separator.

3. The ozone micro-nano bubble oxidation and biotechnology combined wastewater treatment system of claim 1, wherein: the ozone oxidation area is arranged in a pipeline.

4. The ozone micro-nano bubble oxidation and biotechnology combined wastewater treatment system of claim 1, wherein: the ozone oxidation zone is provided with a catalytic module.

5. The wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology of claim 3, characterized in that: the ozone oxidation area is provided with a catalytic module which is in a tubular shape and is attached to the inner wall of the ozone oxidation area.

6. The wastewater treatment system combining ozone micro-nano bubble oxidation and biotechnology of claim 2, characterized in that: the device also comprises a pH adjusting area, wherein the pH adjusting area is positioned between the ozone oxidation area and the three-phase separator.

7. The ozone micro-nano bubble oxidation and biotechnology combined wastewater treatment system of claim 1, wherein: a sponge carrier is paved in the biological reaction area.

8. The ozone micro-nano bubble oxidation and biotechnology combined wastewater treatment system of claim 1, wherein: the ozone oxidation zone is connected with the bioreaction zone through a buffer tube.

9. The ozone micro-nano bubble oxidation and biotechnology combined wastewater treatment system of claim 1, wherein: the biological reaction area is provided with an aeration device.