Cavitation effect enhanced biological reaction core and system

Abstract

The invention relates to the technical field of site pollution control and remediation, and discloses a cavitation effect enhanced biological reaction core and system. The biological reaction core comprises a biological core material component, a cavitation effect strengthening component and an aeration component, the biological core material component comprises a shell and a core material, and the core material comprises an adsorption material; the cavitation effect strengthening component comprises a first ultrasonic transmitting module and a second ultrasonic transmitting module; the aeration component is used for providing air towards the bottom of the shell. The biological reaction core provided by the invention is arranged in a dotted insertion manner and can adapt to a complex facility environment of a production site, and the first ultrasonic transmitting module transmits ultrasonic waves to generate a high-strength cavitation effect to decompose macromolecular organic pollutants to generate micromolecular organic pollutants; ultrasonic waves emitted by the second ultrasonic transmitting module can generate a low-intensity cavitation effect, so that microorganisms can degrade and remove small molecular products in the low-intensity ultrasonic cavitation effect strengthening and aerobic environment.

Description

Technical Field

[0001] The present invention relates to the technical field of site pollution control and remediation, and particularly to a cavitation effect-enhanced biological reaction core and system. Background Art

[0003] In recent years, the country's requirements for soil and groundwater pollution prevention and control have become increasingly strict, especially for macromolecular aromatic hydrocarbons, halogenated organic compounds, and emerging organic pollutants, such as benzo[a]pyrene, chlorinated hydrocarbons, and fluorides. Although various technical materials, devices, and equipment for pollution removal, remediation, and pollution diffusion control have been developed at home and abroad based on physical, chemical, and biodegradation principles, there are still various restrictive problems in the application at production sites. At the same time, the degradation of macromolecular aromatic hydrocarbons, halogenated organic compounds, and emerging organic pollutants, such as benzo[a]pyrene, chlorinated hydrocarbons, and fluorides, which pose a greater threat to human health, still faces great challenges, and new technical equipment is urgently needed for treatment.

[0004] Groundwater organic pollutant treatment technologies include in-situ extraction treatment, in-situ chemical oxidation, in-situ chemical leaching, in-situ biostimulation, in-situ bioremediation, etc. Among them, technologies based on microbial remediation have good application prospects. They mainly achieve the biodegradation of pollutants by injecting microbial agents and changing the metabolic environment, and have the advantages of being green, pollution-free, and complete degradation. Currently, in-situ microbial agent stimulant injection technology, permeable reactive barrier technology, etc. have been formed. However, for macromolecular aromatic hydrocarbons, halogenated organic compounds, and emerging organic pollutants, such as benzo[a]pyrene, chlorinated hydrocarbons, and fluorides, which pose a greater threat to human health, it is difficult for microorganisms to carry out efficient degradation.

[0005] For example, Chinese invention patent CN114752535A discloses a bioremediation agent for total petroleum hydrocarbon-contaminated groundwater, its preparation method and application. The microbial agents provided by the bioremediation agent play a synergistic effect, significantly improving the biological treatment efficiency of total petroleum hydrocarbon-contaminated groundwater, and having good degradation effects on petroleum hydrocarbons, benzene series, polycyclic aromatic hydrocarbons, and methyl tert-butyl ether. The columnar reaction zone structure and method for pollution site risk control and remediation disclosed in Chinese invention patent CN108526205A adopt a reaction core in the reaction well, but this reaction core is only a core material mixed with various materials mainly composed of agents, including oxidants, reductants, adsorbents, microbial agents, etc., and has poor treatment effects on various organic pollutants, especially macromolecular aromatic hydrocarbons, halogenated organic compounds, and emerging organic pollutants.

[0006] It can be seen that the current groundwater organic pollutant treatment technologies can, to a certain extent, achieve the remediation of retired or relocated contaminated sites. However, due to the complex production facilities, continuous operation of the devices, and flammable and explosive environmental atmosphere in in-service sites, the existing technical materials and equipment are difficult to meet the safety prevention and control requirements of contaminated sites in in-service enterprises. In addition, for macromolecular aromatic hydrocarbons, halogenated organic compounds, and emerging organic pollutants such as benzo[a]pyrene, chlorinated hydrocarbons, and fluorides, it is difficult to degrade and remove them using existing in-situ treatment technologies. Summary of the Invention

[0007] To solve the above technical problems or at least partially solve the above technical problems, the present invention provides a cavitation effect-enhanced biological reaction core and system.

[0008] The present invention provides a cavitation effect-enhanced biological reaction core, comprising:

[0009] A biological core material component, including a housing and a core material filled inside the housing. The core material includes an adsorption material loaded with microorganisms, and a through-hole structure is arranged on the side wall of the housing;

[0010] A cavitation effect-enhanced component, including a first ultrasonic emission module arranged at the bottom of the housing and at least one second ultrasonic emission module arranged above the first ultrasonic emission module. The intensity of the ultrasonic wave emitted by the first ultrasonic emission module is greater than the intensity of the ultrasonic wave emitted by the second ultrasonic emission module;

[0011] An aeration component for providing air towards the bottom of the housing. The generated micro-nano bubbles can be adsorbed and retained in the pores of the adsorption material, and can form an aerobic zone on the outer periphery of the housing. At the same time, an upward water flow can be formed inside the core tube of the housing. In addition, the micro-nano bubbles also serve as cavitation nuclei for cavitation effect generation.

[0012] Optionally, the cavitation effect-enhanced component further includes an ultrasonic controller for adjusting the frequency and intensity of the ultrasonic waves emitted by the first ultrasonic emission module and the second ultrasonic emission module.

[0013] Optionally, the frequency of the ultrasonic wave emitted by the first ultrasonic emission module is 20 KHz - 80 KHz, the emission intensity is 0.2 W / cm 2 - 0.5 W / cm 2 , the emission frequency is 3 - 5 times / d, and / or

[0014] the frequency of the ultrasonic wave emitted by the second ultrasonic emission module is 20 KHz - 80 KHz, the emission intensity is 0.5 W / cm 2 - 3 W / cm 2 , and the emission frequency is 3 - 5 times / d.

[0015] Optionally, the aeration member includes a gas supply device and an aeration disk. The aeration disk is disposed below the core material, and aeration holes are evenly distributed on the aeration disk. The microbubbles provided by the gas supply device can flow through the aeration holes to the core material.

[0016] Optionally, the aperture of the aeration holes is 0.1 - 50 μm, and the porosity is 40% - 60%.

[0017] Optionally, the bubble diameter of the air provided through the aeration holes is 100 nm - 10 μm.

[0018] Optionally, an isolation section is provided between the aeration disk and the core material. The isolation section is configured to allow microbubbles to pass through and can isolate the growth of microorganisms.

[0019] Optionally, the isolation section is filled with an oil - repellent particulate material with antibacterial properties.

[0020] Optionally, the oil - repellent particulate material includes modified cotton and linen of natural fiber type, hydrophilic group polyurethane of polymer type, etc.; preferably, the outer surface of the oil - repellent particulate material is coated with an antibacterial agent of silver, copper or zinc.

[0021] Optionally, the isolation section and the core material are separated by an orifice plate.

[0022] Optionally, the diameter of the orifice plate is 90 mm - 150 mm, the diameter of the sieve holes is 0.8 - 1 mm, and the opening ratio is not less than 70%.

[0023] Optionally, the housing includes a core tube and an outer sieve tube sleeved together. The adsorption material is filled in the core tube, and the through - hole structure includes through - holes opened on the side walls of the core tube and the outer sieve tube.

[0024] Optionally, the core tube includes a water inlet section, an up - flow section, and a water outlet section. The water inlet section is located at the end of the core tube close to the aeration disk. Circular sieve holes are opened on the side wall of the water inlet section, with an aperture of 2 mm - 3 mm, a hole pitch of 5 mm - 8 mm, and a section height of 200 mm - 800 mm; the up - flow section is located in the middle section of the core tube, and no holes are opened on the side wall of the up - flow section, with a section height of 600 mm - 5000 mm; the water outlet section is located at the top of the core tube. Circular sieve holes are opened on the side wall of the water outlet section, with an aperture of 2 mm - 3 mm, a hole pitch of 5 mm - 8 mm, and a section height of 200 mm - 800 mm.

[0025] Optionally, the gas supply device includes a gas supply pump and a gas supply pipeline. The gas supply pipeline passes through the annular space between the core tube and the outer sieve tube.

[0026] Optionally, the housing further includes a control box disposed at the top of the core tube and the outer sieve tube, and the air supply pump is disposed within the control box; and / or,

[0027] The ultrasonic controller of the cavitation effect strengthening member is disposed within the control box.

[0028] Optionally, the bioreaction core further includes an energy supply member disposed on the control box, and the energy supply member is configured to supply energy to the air supply pump and the cavitation effect strengthening member.

[0029] Optionally, the energy supply member includes a photovoltaic panel, a storage battery, and a power conversion controller. One end of the power conversion controller is electrically connected to the photovoltaic panel, and the other end is electrically connected to the storage battery. The power output end of the power conversion controller is electrically connected to the air supply pump and the cavitation effect strengthening member, and the photovoltaic panel serves as the top cover of the control box.

[0030] Optionally, the optoelectronic conversion material of the photovoltaic panel is monocrystalline silicon, amorphous silicon, or Cu(In,Ga)Se2 thin film.

[0031] Optionally, the bioreaction core further includes an environmental on-line monitoring member, and the environmental on-line monitoring member is configured to monitor the operating state of the biocore member. The environmental on-line monitoring member can adjust the working parameters of the aeration member and the cavitation effect strengthening member according to the monitored operating state of the biocore member.

[0032] Optionally, the adsorption material includes one or more of carbon-based materials, porous ceramsite, molecular sieves, and carbon nanotubes.

[0033] Optionally, the particle size of the adsorption material is 2-3 mm, wherein the micropore proportion is 30%-40%, the mesopore proportion is 30%-40%, and the macropore proportion is 30%-50%.

[0034] Optionally, the density of the adsorption material is 1.05 g / cm 3 -1.1 g / cm 3 .

[0035] The present invention also provides a bioreaction system strengthened by cavitation effect, including a plurality of the cavitation effect-strengthened bioreaction cores as described in any one of the above.

[0036] Optionally, the influence diameter of the bioreaction core is 3-5 m to form a cylindrical aerobic zone on the outer periphery of the housing, and the cylindrical aerobic zones of a plurality of the bioreaction cores are arranged in a tangent or intersecting manner.

[0037] The technical solutions provided by the embodiments of the present invention have the following advantages compared with the prior art:

[0038] The biological reaction core provided by the present invention can be arranged in a dot-like insertion manner, which can adapt to the complex facility environment of the production site, avoid above-ground facilities and underground pipelines, and will not affect the operation and production of the production site. Moreover, it meets the safety treatment requirements of the in-production pollution site, reduces the difficulty of project implementation and safety risks. The reaction column core is designed for recyclability, which is convenient for replacing and maintaining the reaction core material, and effectively reduces the economic cost of pollution prevention and control at the site. The first ultrasonic emission module in the cavitation effect strengthening component emits ultrasonic waves that can generate a high-intensity cavitation effect to decompose large molecular aromatic organic pollutants and heteroatom organic pollutants, generating small molecular organic pollutants. The small molecular organic pollutants are transferred to the core material along with the rising water flow. The ultrasonic waves emitted by the second ultrasonic emission module can generate a low-intensity cavitation effect to strengthen the microorganisms, so that the microorganisms degrade and remove the small molecular products under the strengthening of the low-intensity ultrasonic cavitation effect and aerobic environment, and mineralize them into CO2 and H20. Among them, the aeration component provides oxygen for the microorganisms, so that the core material can achieve efficient adsorption and microbial degradation of small molecular organic pollutants in the aerobic environment, realize the efficient, green and thorough degradation of refractory pollutants, increase the bioremediation efficiency, and there is no secondary pollution. At the same time, combined with the structure of the biological core material component, the air-lift effect provided by the aeration component can promote the underground water to flow through the biological core material component, form oxygen-rich water and carry microbial degradation bacteria and degradation enzymes, and transport them to the surrounding of the biological reaction core, thereby increasing the influence radius of the biological reaction core and forming an aerobic zone around the shell to increase the bioremediation efficiency of the surrounding environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0040] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0041] Figure 1 It is a schematic structural diagram of the biological reaction core according to the embodiment of the present invention;

[0042] Figure 2 It is a schematic cross-sectional view of the biological reaction core according to the embodiment of the present invention;

[0043] Figure 3 It is a schematic diagram of the air-lift circulation of the core tube according to the embodiment of the present invention;

[0044] Figure 4Schematic diagram of the internal structure of the control box according to the embodiments of the present invention;

[0045] Figure 5 Schematic diagram of the biological reaction core testing device according to the embodiments of the present invention;

[0046] Figure 6 Working principle diagram of the biological reaction core according to the embodiments of the present invention;

[0047] Figure 7 Schematic diagram of the structure of the biological reaction system according to the embodiments of the present invention.

[0048] Explanation of reference numerals

[0049] 1. Biological core material component; 11. Housing; 111. Core body tube; 111-1. Water inlet section; 111-2. Upflow section; 111-3. Water outlet section; 112. Outer sieve tube; 12. Core material; 13. Isolation section; 14. Orifice plate; 15. Control box; 2. Cavitation effect strengthening component; 21. First ultrasonic emission module; 211. Second ultrasonic emission module; 22. Ultrasonic controller; 3. Aeration component; 31. Aeration disk; 32. Air supply pump; 33. Air supply pipeline; 4. Energy supply component; 41. Photovoltaic panel; 42. Energy storage battery; 43. Power conversion controller; 5. Environmental on-line monitoring component; 51. Data transmission module; 52. Environmental monitoring sensor. Specific embodiments

[0050] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the solutions of the present invention will be further described below. It should be noted that, without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0051] Many specific details are set forth in the following description in order to fully understand the present invention, but the present invention can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0052] Combined with Figures 1 to 4 As shown, the cavitation effect-strengthened biological reaction core provided by the embodiments of the present invention includes a biological core material component 1, a cavitation effect strengthening component 2 and an aeration component 3.

[0053] The biological core material component 1 includes a housing 11 and a core material 12 filled inside the housing 11. Among them, the core material 12 forms a core material section inside the housing 11. The core material 12 includes an adsorption material loaded with microorganisms. Through-hole structures are arranged on the side wall of the housing 11, specifically on the side wall of the outer sieve tube 112 of the housing 11, so that the contaminated groundwater can enter the biological core material component 1 through the through-hole structures, and enter the inside of the core body tube 111 through the water inlet section 111-1 of the core body tube, forming an upward flow through the core material 12, passing through the upflow section 111-2, and finally discharging at the water outlet section 111-3 of the core body tube 111. After the groundwater diffuses and settles around, it enters the next hydraulic cycle. During this air-lift cycle, the organic pollutants in the groundwater can be adsorbed by the adsorption material in the core body tube 111 and degraded by microorganisms. At the same time, the microorganisms can release organic pollutant-degrading bacteria and bioenzymes into the groundwater outside the core material 12.

[0054] The cavitation effect strengthening component 2 includes a first ultrasonic emission module 21 arranged at the bottom of the housing 11 and at least one second ultrasonic emission module 211 arranged above the first ultrasonic emission module 21. The intensity of the ultrasonic wave emitted by the first ultrasonic emission module 21 is greater than the intensity of the ultrasonic wave emitted by the second ultrasonic emission module 211. Among them, the first ultrasonic emission module 21 can provide high-intensity ultrasonic waves to form a high-intensity ultrasonic cavitation effect in the bottom area of the housing 11. The macromolecular and heterocyclic refractory organic pollutants in the groundwater are degraded into small-molecule pollutants through the cavitation effect, enabling the physical decomposition of heteroatom-containing organic compounds and aromatic macromolecules. The second ultrasonic emission module 211 can provide low-intensity ultrasonic waves to form a low-intensity ultrasonic cavitation effect in the middle and upper areas of the housing 11. The low-intensity ultrasonic cavitation effect avoids harming microorganisms and can promote the ability of microorganisms to degrade pollutants, strengthening the degradation and removal of small-molecule organic pollutants by the highly efficient degrading bacteria in the core material 12.

[0055] The aeration component 3 is used to supply air towards the bottom of the housing 11 and can form an aerobic zone on the outer periphery of the housing 11. Specifically, the aeration component 3 injects microbubbles into the core material 12 to provide micro-nano-scale oxygen for the microbial degradation of organic pollutants. The generated micro-nano bubbles can be adsorbed and retained in the pores of the adsorption material, prolonging the bubble residence time, enhancing the oxygen dissolution utilization rate and pore penetration depth of the micro-nano bubbles, and promoting the aerobic degradation ability of the core material 12 for organic pollutants. As Figure 3 shown, the microbubbles can also form an upward water flow inside the core body tube 111 of the housing 11, that is, the microbubbles can also generate an air-lift effect: a large number of released microbubbles will float upward, driving the groundwater to flow upward.

[0056] Among them, the core tube 111 includes an inlet section 111-1, an upflow section 111-2, and an outlet section 111-3. The inlet section 111-1 is located at the end of the core tube 111 close to the aeration disk 31. Circular sieve holes are formed on the side wall of the inlet section 111-1, with a pore diameter of 2 mm - 3 mm, a pore spacing of 5 mm - 8 mm, and a section height of 200 mm - 800 mm. The upflow section 111-2 is located in the middle section of the core tube 111. No holes are formed on the side wall of the upflow section 111-2, and the section height is 600 mm - 5000 mm. The outlet section 111-3 is located at the top of the core tube 111. Circular sieve holes are formed on the side wall of the outlet section 111-3, with a pore diameter of 2 mm - 3 mm, a pore spacing of 5 mm - 8 mm, and a section height of 200 mm - 800 mm.

[0057] Due to the mixing of a large number of microbubbles at the lower end inside the core tube 111, the density of the gas-water mixture is lower than that of the surrounding groundwater. At the same time, the groundwater inside the core tube 111 has a certain upward flow rate. According to Bernoulli's equation, this flow rate will cause the pressure to decrease. Under such conditions of low density and low pressure, the surrounding groundwater will enter the lower end of the core tube through the inlet section 111-1 and enter the strong ultrasonic treatment area. Subsequently, an upward flow is formed under the air-lift action and flows through the core material 12, passing through the upflow section 111-2 in the weak ultrasonic area, and entering the outlet section 111-3 of the core tube 111. During this process, the microbubbles will be dissolved, adsorbed, coalesced, and dissipated. When the groundwater flows through the core material 12 inside the core tube 111, the organic pollutants in the groundwater undergo the above ultrasonic cavitation effect and microbial coupling degradation inside the core tube 111, achieving the complete degradation and removal of the organic pollutants. At the same time, a large number of microbial cells and biological enzymes are generated, and some will continue to flow upward with the groundwater. After the microbubbles inside the outlet section 111-3 emerge from the groundwater surface, the air-lift action disappears, and the formed oxygen-rich groundwater settles around through the sieve holes of the outlet section 111-3, forming a hydraulic cycle inside and around the biological reaction core, thereby increasing the dissolved oxygen content around the biological reaction core. At the same time, the carried microbial degradation bacteria and degradation enzymes are transported to the surrounding space, forming an aerobic radiation zone and a microbial enhanced degradation zone with an influence radius of 1.5 - 2.5 m, increasing the influence space of the biological reaction core.

[0058] Micro-nano bubbles also serve as the gas nuclei generated by the cavitation effect within the core tube 111. Among them, when ultrasonic waves (generally 20 kHz - 100 kHz) act on a liquid, the "cavitation effect" will occur, that is, the tiny bubble nuclei in the liquid vibrate under the action of ultrasonic waves. When the sound pressure reaches a certain value, the bubbles will rapidly expand and then suddenly collapse. When the bubbles collapse, shock waves are generated. This series of dynamic processes such as expansion, collapse, and oscillation is called the ultrasonic cavitation effect, which will be accompanied by mechanical effects, local thermal effects, and free radical effects, etc. This "cavitation effect" of high-intensity ultrasonic waves can fully break the long chains of macromolecular organic pollutants and heteroatom organic pollutants, transforming them into small-molecule organic substances, which can be used as the carbon source for biodegradation. Low-intensity ultrasonic waves can cause slight damage to cells. This degree of damage can promote the reversible permeability of cells, enhance the transport rate of substances inside and outside the cells, and promote the cell synthesis rate. The high-frequency vibration generated by ultrasonic waves will stretch the cell surface layer, thereby enhancing the cell permeability. At the same time, it also speeds up the rate of organic substrates and metabolites entering and leaving the cells, increases the enzymatic reaction rate, and thus strengthens the degradation of organic pollutants.

[0059] This design method combines the cavitation effect gas nuclei of the aeration component 3, the aerobic environment, and the air-lift effect. Through the coupling of the cavitation effects of strong and weak ultrasonic waves and microbial degradation, the removal of refractory organic pollutants such as heteroatom organic compounds and aromatic macromolecules is achieved.

[0060] The biological reaction core provided by the present invention can be arranged in a dot-like insertion manner, which can adapt to the complex facility environment of the production site, avoid above-ground facilities and underground pipelines, and will not affect the operation and production of the production site. Moreover, it meets the safety treatment requirements of the contaminated production site, reduces the difficulty of project implementation and safety risks. The reaction column core is designed for recyclability, which is convenient for the replacement and maintenance of the reaction core material 12, and effectively reduces the economic cost of pollution prevention and control at the site. The first ultrasonic emission module 21 in the cavitation effect strengthening member 2 emits ultrasonic waves that can generate a high-intensity cavitation effect to decompose macromolecular aromatic organic pollutants and heteroatom organic pollutants, generating small-molecular organic pollutants. The small-molecular organic pollutants are transferred to the core material 12 along with the upward water flow. The ultrasonic waves emitted by the second ultrasonic emission module 211 can generate a low-intensity cavitation effect to strengthen the microorganisms, so that the microorganisms degrade and remove the small-molecular products under the strengthening of the low-intensity ultrasonic cavitation effect and aerobic environment, and mineralize them into CO2 and H20. Among them, the aeration member 3 provides oxygen (micro-nano bubbles) for the microorganisms. Under the action of the bubbles, the contaminated groundwater forms a water flow cycle inside and outside the housing 11, and an aerobic environment conducive to the degradation of organic pollutants is formed in the core material section, so that the core material 12 can achieve the efficient adsorption and microbial degradation of small-molecular organic pollutants in the aerobic environment, realize the efficient, green and thorough degradation of refractory pollutants, increase the bioremediation efficiency, and there is no secondary pollution. At the same time, the air-lift effect generated by the released micro-bubbles can increase the dissolved oxygen content in the periphery of the biological reaction core, form an aerobic zone, and at the same time transport the carried microbial degradation bacteria and degradation enzymes to the surrounding space to increase the bioremediation efficiency of the surrounding environment.

[0061] In some embodiments, the core material 12 further includes a functional material filled inside the housing 11. The function of the functional material is to improve the degradation and removal ability of microorganisms to pollutants, adjust the pH environment suitable for the metabolism of microorganisms, enhance the dehydrogenase activity of microorganisms, etc., including tourmaline materials, sodium bicarbonate slow-release granule materials, etc. The density of the particles of the functional material is 1.05 g / cm3 - 1.1 g / cm 3 , and the particle size is 2 mm - 3 mm.

[0062] Among them, the core material 12 is the core area for the degradation and removal of organic pollutants. The total filling rate is 20% - 40%, and the section height is 800 mm - 5500 mm, which can be designed according to actual needs. This filling method makes the core material 12 present an expanded fluidized state, promotes the homogenization of pollutants in the core material 12, and enhances the efficiency of the core material 12 in treating pollutants.

[0063] The cavitation effect strengthening component 2 further includes an ultrasonic controller 22, which is used to adjust the frequency and intensity of the ultrasonic waves emitted by the first ultrasonic emission module 21 and the second ultrasonic emission module 211. This design method can actively adjust the frequency and intensity of the ultrasonic waves emitted by the first ultrasonic emission module 21 and the second ultrasonic emission module 211 according to the degradation and removal requirements of different pollutant types and concentrations, so as to reach the optimal strengthening and removal parameters.

[0064] In some embodiments, the frequency of the ultrasonic waves emitted by the first ultrasonic emission module 21 is 20KHz - 80KHz, and the emission intensity is 0.2W / cm 2 - 0.5W / cm 2 The emission frequency is 3 - 5 times per day to meet the emission requirements of high-intensity ultrasonic waves.

[0065] The frequency of the ultrasonic waves emitted by the second ultrasonic emission module 211 is 20KHz - 80KHz, and the emission intensity is 0.5W / cm 2 - 3W / cm 2 The emission frequency is 3 - 5 times per day to meet the emission requirements of low-intensity ultrasonic waves. Among them, there can be multiple second ultrasonic emission modules 211, and the interval between every two adjacent second ultrasonic emission modules 211 is 1.5m.

[0066] Under this design method, the cavitation effect strengthening component 2 can form a weak ultrasonic radiation area in the area of 2m - 3m around the shell 11, which can dredge the mass transfer channels for the internal and external diffusion of enzymes, thereby improving enzyme activity, helping to strengthen the transfer and transportation of substances inside and outside cells by ultrasound, promoting the synthesis reaction of cells, accelerating cell metabolism and growth, forming a dominant flora, and thus forming a reaction zone to strengthen the degradation of pollutants.

[0067] The aeration component 3 includes an air supply device and an aeration disk 31. The aeration disk 31 is arranged below the core material 12, and the aeration holes are evenly distributed on the aeration disk 31. The microbubbles provided by the air supply device can flow through the aeration holes to the core material 12, and then can provide micro-nano bubbles from bottom to top inside the shell 11. Among them, the diameter of the aeration disk 31 is 90 - 150mm, and the material used is a titanium sintered aeration disk 3131. The aperture of the aeration holes is 0.1 - 50μm, and the porosity is 40% - 60%. The bubble diameter of the air provided through the aeration holes is 100nm - 10μm.

[0068] An isolation section 13 is provided between the aeration disk 31 and the core material 12. The isolation section 13 is set to allow microbubbles to pass through and can isolate microorganisms. By setting the isolation section 13, the phenomenon of blockage of the aeration disk 31 caused by the growth of microorganisms can be prevented, and the air supply effect of the aeration disk 31 can be ensured.

[0069] As a feasible implementation, the isolation section 13 is filled with oil-repellent granular materials with antibacterial properties. The particle size of the oil-repellent granules is 1-2 mm, the filling rate is 90%-95%, and the section height of the isolation section 13 is 150 mm-200 mm.

[0070] Among them, the oil-repellent granular materials include modified cotton and linen of natural fiber type, hydrophilic group polyurethane of polymer type, etc. The outer surface of the oil-repellent granular materials is coated with antibacterial agents such as silver, copper, and zinc.

[0071] The isolation section 13 is separated from the core material 12 by a perforated plate 14. Specifically, the oil-repellent granular materials are separated from the core material 12 by a partition to prevent the direct contact between the oil-repellent granular materials and the core material 12. The diameter of the perforated plate 14 is 90 mm-150 mm, the sieve hole diameter is 0.8-1 mm, the opening rate is not less than 70%, and the material is made of 304 stainless steel.

[0072] Continue to refer to Figure 2 , the housing 11 includes a sleeved core tube 111 and an outer sieve tube 112. The adsorption material is filled in the core tube 111. The through-hole structure includes through-holes opened on the side walls of the core tube 111 and the outer sieve tube 112. Among them, the through-holes of the core tube 111 are arranged in the water inlet section 111-1 and the water outlet section 111-3, and the outer sieve tube 112 is entirely covered with slotted through-holes. Under this design method, the outer sieve tube 112 serves as the protective mother tube of the biological core material component 1 and needs to be placed underground in advance during use. The wall thickness of the outer sieve tube 112 is 3 mm-5 mm, made of 304 stainless steel or high-strength engineering plastic, with a diameter of 200-300 mm and a height of 1000-6000 mm. It adopts slotted sieve patterns, with a slot width of 30 mm-40 mm, a slot height of 3 mm-4 mm, a slot pitch of 8 mm-10 mm, and 8 columns in the circumferential direction, and is connected to the top control box 15 by a card slot. The core tube 111 is the carrier of the core material 12 and is inserted into the outer sieve tube 112 during use and is connected in a card slot fixed manner to increase the convenience of disassembly and assembly. The core material 12 of this design method can be designed for recycling. After the site pollution treatment is completed, the core tube 111 and / or the outer sieve tube 112 can be drawn out from the reaction well and can be reused after maintenance. This functional design can greatly reduce the cost of site pollution treatment. The wall thickness of the core tube 111 is 3 mm-5 mm, made of 304 stainless steel or high-strength engineering plastic, with a diameter of 100-160 mm and a height of 1000-6000 mm. The water inlet section 111-1 and the water outlet section 111-3 adopt circular sieve holes with a pore diameter of 2 mm-3 mm and a wall hole pitch of 5 mm-8 mm. The core tube 111 is connected to the top control box 15 by a card slot.

[0073] As Figure 4As shown, the air supply device includes an air supply pump 32 and an air supply pipeline 33. The air supply pipeline 33 passes through the annular space between the core tube 111 and the outer screen tube 112. Among them, the diameter of the air supply pipeline 33 is φ6 - φ8, the length is 1000 - 6000 mm, and the material is 304 stainless steel. The volume of the air supply pump 32 is less than 180 mm * 100 mm * 140 mm, the power is less than 100 W, the maximum air pressure is not less than 80 PSI, and the maximum air supply rate is not less than 10 L / min to meet the air supply demand.

[0074] Combined with Figure 1 、 Figure 2 and Figure 4 As shown, the housing 11 further includes a control box 15 provided at the top of the core tube 111 and the outer screen tube 112, and the air supply pump 32 is provided in the control box 15. The ultrasonic controller 22 of the cavitation effect strengthening member 2 is provided in the control box 15 to avoid potential electrical safety hazards. Moreover, the joints where the air supply pump 32 is connected to the external open environment are all explosion-proof joints, further enhancing the safety during use. Among them, the control box 15 can adopt an explosion-proof structure with a wall thickness of 3 mm - 5 mm, made of 304 stainless steel, with a diameter of 400 - 1000 mm and a height of 110 mm - 150 mm.

[0075] The biological reaction core further includes an energy supply member 4 provided on the control box 15. The energy supply member 4 is used as an energy supply control module. The energy supply member 4 is used to supply energy to the air supply pump 32 and the cavitation effect strengthening member 2, specifically to supply energy to the ultrasonic controller 22 of the cavitation effect strengthening member 2. Further optimally, the energy supply member 4 can also supply energy to the following environmental on-line monitoring member 5. In this application, the energy supply member 4 provides power support for the operation of the device and equipment, realizing pollution-free and low-carbon restoration.

[0076] As Figure 4As shown, the energy supply component 4 includes a photovoltaic panel 41, a storage battery 42, and a power conversion controller 43. One end of the power conversion controller 43 is electrically connected to the photovoltaic panel 41, and the other end is electrically connected to the storage battery 42. The power output end of the power conversion controller 43 is electrically connected to the air supply pump 32 and the cavitation effect strengthening component 2. The photovoltaic panel 41 serves as the top cover of the control box 15. Among them, the optoelectronic conversion material of the photovoltaic panel 41 is monocrystalline silicon, amorphous silicon, or Cu(In,Ga)Se2 thin film. The photovoltaic panel 41 adopts an explosion-proof structure to increase the safety of use. The diameter of the photovoltaic panel 41 is 400 - 1000mm. The volume of the 12V power conversion controller 43 is less than 80*40*40, it can support the power connection ports of no less than 3 micro-devices, and the maximum power is 200W; the storage battery 42 is a high-capacity lithium battery, the volume of the high-capacity lithium battery is less than 150mm*80mm*80mm, the capacity is 100 - 200WH, the maximum output voltage is 12 - 18V, and the maximum current is 8A - 18A. When the energy supply of the photovoltaic panel 41 is insufficient in this system, external 220V AC power supply can be connected. When connecting to the external 220V AC power supply, one end of the power conversion controller 43 is electrically connected to the photovoltaic panel 41 and the external 220V AC power supply device.

[0077] This design method provides power support for the operation of device equipment through low-carbon photovoltaic energy supply, can reduce the energy consumption of site pollution treatment, and achieve low-carbon pollution remediation. In addition, all electrical appliances are explosion-proof designs and can be arranged according to the actual situation of in-production site facilities.

[0078] The bioreaction core further includes an environmental on-line monitoring component 5. The environmental on-line monitoring component 5 is used to monitor the operation state of the biocore material component 1, specifically for on-line monitoring of the changes in various environmental indicators of the biocore material component 1, and uploading the monitoring information to the cloud server terminal through the Modbus protocol (serial communication protocol) under 4G communication. The environmental on-line monitoring component 5 can adjust the working parameters of the aeration component 3 and the cavitation effect strengthening component 2 according to the operation state of the biocore material component 1 it monitors. Among them, the monitoring indicators of the environmental on-line monitoring component 5 include but are not limited to dissolved oxygen, pH, types and concentrations of pollutants, etc. The environmental on-line monitoring component 5 includes an on-line control and data transmission module 51 and an environmental monitoring sensor 52. The on-line control and data transmission module 51 is arranged in the control box 15, and the environmental monitoring sensor 52 is arranged in the annular space between the core tube 111 and the outer sieve tube 112. By setting the environmental on-line monitoring component 5, the operation state inside the core tube 111 of the bioreaction core can be monitored in real time on-line, and it can also be used as the basis for optimizing and adjusting the core material 12 and micro-aeration.

[0079] Specifically, the environmental on-line monitoring component 5 can monitor each parameter based on the petroleum hydrocarbon sensor probe, dissolved oxygen sensor probe, and pH sensor probe. This monitoring method is a conventional means in the art, so the working principle is not described in detail herein. Among them, when the environmental on-line monitoring component 5 on-line monitors that the dissolved oxygen is lower than 2 mg / L, it indicates an anoxic environment at this time, indicating that the microbial degradation lacks electron acceptors, and the aeration volume needs to be adjusted to reach the dissolved oxygen value for aerobic microbial degradation. When the environmental on-line monitoring component 5 on-line monitors that the pH value is lower than 6.8, it indicates an acidic environment at this time, which is not conducive to the microbial degradation of pollutants, and a slightly alkaline slow-release granular material needs to be added. When the environmental on-line monitoring component 5 on-line monitors that the petroleum hydrocarbon concentration is continuously lower than the standard value, the biological reaction device can stop operating. In addition, when the concentration of pollutants changes, the parameters of the cavitation effect strengthening component can be adjusted to adjust the frequency and intensity of ultrasonic waves to the optimal pollutant removal parameters to ensure the pollutant removal effect.

[0080] The adsorption material includes one or more of carbon-based materials, porous ceramsite, molecular sieves, and carbon nanotubes. That is, the adsorption material can be one of carbon-based materials, porous ceramsite, molecular sieves, and carbon nanotubes, or composed of a mixture of multiple of carbon-based materials, porous ceramsite, molecular sieves, and carbon nanotubes. The particle size of the adsorption material is 2-3 mm, among which the micropore proportion is 30%-40%, the mesopore proportion is 30%-40%, and the macropore proportion is 30%-50%. The specific ratio is determined according to the molecular size of the pollutants. The density of the particles of the adsorption material is 1.05 g / cm 3 -1.1 g / cm 3 .

[0081] Under this design method, in the strong ultrasonic water inlet area at the lower part of the core tube 111, macromolecular and heterocyclic refractory organic pollutants in groundwater can be degraded into small molecule pollutants through the "cavitation effect" of ultrasonic waves. The related products are further transferred into the hierarchically porous core material 12 with the rising water flow in the core tube 111, and then in the weak ultrasonic area, the highly efficient degrading bacteria in the core material 12 degrade and remove the small molecule products under the strengthening of the low-intensity ultrasonic cavitation effect and aerobic environment, and mineralize them into CO2 and H20.

[0082] The connection relationship of the biological reaction core provided by the present invention is as follows:

[0083] The isolation section 13 is located at the inner bottom of the core tube 111. The orifice plate 14 is located on the upper side of the isolation section 13. The core material section composed of the core material 12 is located on the upper side of the orifice plate 14, and the core material section is assembled by filling. The first ultrasonic emission module 21 and the second ultrasonic emission module 211 are connected to the ultrasonic controller 22 through cables. Among them, the number of the second ultrasonic emission modules 211 can be two. At this time, the first ultrasonic emission module 21 is located at the bottom of the core material section, one of the second ultrasonic emission modules 211 is located in the middle of the core material section, and the other second ultrasonic emission module 211 is located at the top of the core material section. Place the core tube 111 filled with the core material 12 inside the outer screen tube 112. The control box 15 is located at the upper end of the outer screen tube 112. The control box 15 is connected to the outer screen tube 112 through a card slot, which increases the convenience of disassembly and assembly. The upper end of the core tube 111 is clamped into the lower concave sleeve position of the control box 15. The top of the control box 15 is connected to the circular energy-supplying photovoltaic panel 41 in an explosion-proof and sealed manner by means of flange screw holes. The setting of the overall structure facilitates the replacement, maintenance and reuse of the core material 12. The air supply pump 32, the ultrasonic controller 22, the power conversion controller 43, the high-capacity lithium battery and the on-line control and data transmission module 51 are all installed inside the explosion-proof control box 15, and the power supply and signal transmission between them are connected through cables. The environmental monitoring sensor 52 is fixed on the outer wall at the depth of 1 / 2 of the core tube 111, and the upper end is connected to the on-line control and data transmission module 51 through a cable. The aeration disc 31 is fixed at the bottom end of the core tube 111 and is connected to the air supply pump 32 in the control box 15 through an air supply pipeline 33. The gas inlet pipe of the air supply pump 32 extends out of the control box 15 and is connected to the air supply tank. One end of the power conversion controller 43 is connected to the energy-supplying photovoltaic panel 41, and the other end is connected to the high-capacity lithium battery. At the same time, the power output end of the power conversion controller 43 is respectively connected to the ultrasonic controller 22, the air supply pump 32 and the on-line control and data transmission module 51.

[0084] As Figure 6 shown, the installation, application and working process of the biological reaction core provided by the present invention are as follows:

[0085] Before use, according to the molecular properties of the macromolecule and heteroatom target pollutants at the application site, combined with the multi-stage pore distribution ratio of micropores, mesopores and macropores, construct the composition of the core material. At the same time, take the polluted soil to enrich and screen the indigenous degradation bacteria of the target pollutants, and complete the enlarged culture and the immobilization of the degradation bacteria on the core material, and then complete the pre-filling of the core material 12. Drill a hole for placing the biological reaction core at the layout point through a drill rig, insert the outer screen tube 112 as the mother tube into the ground hole, fill the circumferential gap of the outer screen tube 112 with 3-4 mm quartz sand, then insert the pre-assembled core tube 111 into the inside of the outer screen tube 112, and finally put the control box 15 on the top of the core tube 111, and connect the cables and pipelines through explosion-proof joints, then the biological reaction core can be started to operate.

[0086] The operating status of the biological reaction core can be monitored and controlled through the cloud platform terminal, the aeration intensity of the biological reaction core can be adjusted in real time, water environment sensor indicators such as dissolved oxygen, pH, and pollutants of the core material 12 can be monitored, and the emission wavelength and intensity of ultrasonic waves can be adjusted online to enhance the degradation ability of pollutants through the cavitation effect. During the operation of the biological reaction core, the contaminated groundwater flows through the core material 12 inside the core body tube 111 under the action of air lift. The core material 12 presents an expanded bed state, and organic pollutants will be strongly adsorbed inside and degraded by microorganisms. The refractory pollutants are decomposed in the strong ultrasonic water inlet area near the first ultrasonic emission module 21. The generated small molecule organic pollutants are under aerobic environmental conditions in the weak ultrasonic water rising area (the middle area of the housing 11) and the weak ultrasonic water outlet area (the top area of the housing 11) above the first ultrasonic emission module 21 along with the rising water flow, and the microbial degradation of organic pollutants is realized. During this process, ultrasonic waves will promote the micro-dissolution of O2 in groundwater, and an aerobic radiation zone with an influence radius of 1.5 - 2.5 m will be formed around the biological reaction core to promote the degradation and removal of pollutants. By arranging multiple biological reaction cores, a blocking and control reaction zone for the diffusion of organic pollutants can be formed. During the operation of the biological reaction core, it can be pulled out for the maintenance of the core material 12 and components. After the operation is completed, the biological reaction core equipment can be pulled out and recycled.

[0087] This application couples the cavitation effect of ultrasonic waves with microbial degradation, and can effectively treat macromolecular aromatic organic pollutants and heteroatom organic pollutants in water bodies, especially benzo[a]pyrene, fluorides, etc. The biological reaction core under this design method will apply different intensities of ultrasonic waves in different zones. First, the macromolecular aromatic organic pollutants and heteroatom organic pollutants are decomposed through the high-intensity cavitation effect of ultrasonic waves to generate small molecule organic pollutants, and then the complete degradation and removal of organic pollutants are achieved through microbial metabolism. Among them, low-intensity ultrasonic waves can also enhance the degradation ability of microorganisms to pollutants. The biological reaction core under this design method combines the characteristics of ultrasonic waves that can degrade macromolecular aromatic organic pollutants and heteroatom organic pollutants with the advantages of microbial degradation, and can achieve the removal, repair, and diffusion control of macromolecular aromatic hydrocarbons, halogenated organic compounds, and emerging organic pollutants at the production site, with the advantages of safety, feasibility, economy, and high efficiency.

[0088] As Figure 7 shown, the present invention also provides a biological reaction system enhanced by the cavitation effect, including a plurality of biological reaction cores enhanced by the cavitation effect as described in any one of the above. The biological reaction core here includes all the technical features of the above biological reaction core, and multiple biological reaction cores can be arranged in a dot-like insertion manner. It can be understood that multiple biological reaction cores can also be arranged in other forms, which can be designed according to actual needs.

[0089] In some embodiments, the influence diameter of the biological reaction core is 3-5 m, so as to form a cylindrical aerobic zone on the outer periphery of the housing 11. Among them, the cylindrical aerobic zones of multiple biological reaction cores are arranged in a tangent or intersecting manner, so as to cover the largest repair range with the minimum number of biological reaction cores.

[0090] In this design method, the biological reaction system inserts the columnar biological reaction core in-situ into the groundwater of the organic pollution site to form an in-situ high-efficiency reaction zone for microbial degradation coupled with the "cavitation effect". By intercepting and removing organic pollutants, pollution diffusion control and remediation are achieved.

[0091] The biological reaction system provided by the present invention is mainly applied to the in-situ treatment and remediation of organic pollution in the soil and groundwater of in-service enterprise sites and the diffusion control of pollution plumes, especially the prevention and control of macromolecular aromatic hydrocarbons, halogenated organic compounds and organic emerging pollutants, such as benzo[a]pyrene, chlorinated hydrocarbons and fluorides. Due to their characteristics of heavy pollution, great harm and easy diffusion, these pollutants are long-term stored in the site soil and groundwater, which will cause serious harm to human health and the ecological system. Moreover, with the migration of groundwater, rainfall leaching and water level fluctuations, etc., the pollution range is expanded, resulting in further aggravation of groundwater pollution. Therefore, it is urgent to effectively repair and control the pollution. However, there are many deficiencies and problems in the application of existing various technical equipment in in-production pollution sites, such as limited degradation ability and great impact on operation and production. Based on the strong and weak cavitation effects of ultrasonic waves and microbial degradation and remediation, combined with the aeration component 3, recyclable design and multi-sensor monitoring, the present invention solves the above problems of existing technical equipment. The present invention can provide technical and hardware support for the safe, low-carbon and economic prevention and control mode of in-production pollution sites, and has good application prospects and high use value.

[0092] As Figure 5 shown, the biological reaction core equipment is tested in an outdoor test device. The test device has a diameter of 2000 mm and a height of 1700 mm, and is filled with fine sand inside. Before the test, groundwater containing pollutants at the target concentration is injected. The groundwater depth is 200 mm, and 1 monitoring well is arranged in the fine sand 0.7 m away from the biological reaction core. The cavitation effect-enhanced biological reaction core of the present application is placed in the center of the test device. The total length of the biological reaction core is 1.5 m, including 1 first ultrasonic emission module 21 and 1 second ultrasonic emission module 211. Among them, the reagents, instruments and equipment used in the embodiments are all common in the production and application in this field and can be obtained or prepared through various channels.

[0093] In the following embodiments, the implementation test of the biological reaction core is carried out according to the above method. Before the biological reaction core is arranged, the core material 12 of the corresponding organic pollutant-degrading bacteria is compounded. The implementation test period is 30 d, and a gas chromatography-mass spectrometry (GC-MS) instrument is used to measure the pollutants in the groundwater.

[0094] Example 1

[0095] In this example, the groundwater pollutant is benzo[a]pyrene. Groundwater contaminated with 0.5 μg / L of benzo[a]pyrene is configured and injected into the test equipment. After standing for 3 days, the concentration of benzo[a]pyrene in the groundwater in the monitoring well is stable at 0.2 - 0.3 μg / L. A biological reaction core filled with benzo[a]pyrene-degrading bacteria is placed in the center of the fine sand in the test equipment. After connecting an external power supply, the biological reaction core is started. The on-line dissolved oxygen value of the biological reaction core remains at 3 - 5 mg / L, and the pH remains at 7.1 - 7.3. Cloud monitoring and control of the biological reaction core can be achieved through the on-line system. The strong ultrasonic wave emission frequency is 40 KHz, and the intensity is 2 W / cm 2 , with a frequency of 3 times / day. The weak ultrasonic wave emission frequency is 70 KHz, and the intensity is 0.2 W / cm 2 , with a frequency of 3 times / day. The concentration of benzo[a]pyrene in the monitoring well is measured every day. The concentration of benzo[a]pyrene gradually decreases. After the 21st day, the concentration of benzo[a]pyrene is stable below 0.01 μg / L.

[0096] Example 2

[0097] In this example, the groundwater pollutant is chloroform. Groundwater contaminated with 100 μg / L of chloroform is configured and injected into the test equipment. After standing for 3 days, the concentration of chloroform in the groundwater in the monitoring well is stable at 70 - 80 μg / L. A biological reaction core filled with chloroform-degrading bacteria is placed in the center of the fine sand in the test equipment. After connecting an external power supply, the biological reaction core is started. The on-line dissolved oxygen value of the biological reaction core remains at 4 - 5 mg / L, and the pH remains at 7.3 - 7.4. Cloud monitoring and control of the biological reaction core can be achieved through the on-line system. The strong ultrasonic wave emission frequency is 40 KHz, and the intensity is 3 W / cm 2 , with a frequency of 5 times / day. The weak ultrasonic wave emission frequency is 70 KHz, and the intensity is 0.2 W / cm 2 , with a frequency of 3 times / day. The concentration of chloroform in the monitoring well is measured every day. The concentration of chloroform gradually decreases. After the 19th day, the concentration of chloroform is stable below 6 μg / L.

[0098] Example 3

[0099] In this example, the groundwater pollutant is vinyl chloride. Groundwater contaminated with 50 μg / L of vinyl chloride is configured and injected into the test equipment. After standing for 3 days, the concentration of vinyl chloride in the groundwater in the monitoring well is stable at 30 - 35 μg / L. A biological reaction core filled with vinyl chloride-degrading bacteria is placed in the center of the fine sand in the test equipment. After connecting an external power supply, the biological reaction core is started. The on-line dissolved oxygen value of the biological reaction core remains at 2 - 4 mg / L, and the pH remains at 6.8 - 7.0. Cloud monitoring and control of the biological reaction core can be achieved through the on-line system. The strong ultrasonic wave emission frequency is 40 KHz, and the intensity is 3 W / cm 2, frequency 5 times / d, weak ultrasonic emission frequency 70KHz, intensity 0.2W / cm 2 , frequency 3 times / d. The vinyl chloride concentration in the monitoring well is measured every day, and the vinyl chloride concentration gradually decreases. After the 15th day, the vinyl chloride concentration stabilizes below 5 μg / L.

[0100] Example 4

[0101] In this example, the groundwater pollutant is trifluoroacetic acid. Prepare 1000 ng / L of trifluoroacetic acid-polluted groundwater and inject it into the test equipment. Let it stand for 3 days. The trifluoroacetic acid concentration in the groundwater of the monitoring well stabilizes at 600 - 800 ng / L. Place the biological reaction core filled with trifluoroacetic acid-degrading bacteria in the center of the fine sand in the test equipment. After connecting the external power supply, start the biological reaction core. The on-line dissolved oxygen value of the biological reaction core remains at 3 - 5 mg / L, and the pH remains at 6.8 - 7.3. The cloud monitoring and control of the biological reaction core can be realized through the on-line system. Strong ultrasonic emission frequency 40KHz, intensity 5W / cm 2 , frequency 5 times / d, weak ultrasonic emission frequency 70KHz, intensity 0.2W / cm 2 , frequency 3 times / d. The trifluoroacetic acid concentration in the monitoring well is measured every day, and the trifluoroacetic acid concentration gradually decreases. After the 16th day, the trifluoroacetic acid concentration stabilizes below 150 ng / L.

[0102] Example 5

[0103] In this example, the groundwater pollutant is methyl parathion. Prepare 50 μg / L of methyl parathion-polluted groundwater and inject it into the test equipment. Let it stand for 3 days. The methyl parathion concentration in the groundwater of the monitoring well stabilizes at 30 - 40 μg / L. Place the biological reaction core filled with methyl parathion-degrading bacteria in the center of the fine sand in the test equipment. After connecting the external power supply, start the biological reaction core. The on-line dissolved oxygen value of the biological reaction core remains at 3 - 5 mg / L, and the pH remains at 6.8 - 6.9. The cloud monitoring and control of the biological reaction core can be realized through the on-line system. Strong ultrasonic emission frequency 40KHz, intensity 5W / cm 2 , frequency 5 times / d, weak ultrasonic emission frequency 70KHz, intensity 0.2W / cm 2 , frequency 3 times / d. The methyl parathion concentration in the monitoring well is measured every day, and the methyl parathion concentration gradually decreases. After the 22nd day, the methyl parathion concentration stabilizes below 10 μg / L.

[0104] It should be noted that in this text, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising said element.

[0105] The above are only specific embodiments of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments described herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A biological reaction core with enhanced cavitation effect, characterized in that Comprising: A bio-core material component (1), including a housing (11) and a core material (12) filled inside the housing (11), the core material (12) including an adsorption material loaded with microorganisms, and a through-hole structure being arranged on the side wall of the housing (11); A cavitation effect strengthening component (2), including a first ultrasonic emission module (21) arranged at the bottom of the housing (11) and at least one second ultrasonic emission module (211) arranged above the first ultrasonic emission module (21), the intensity of the ultrasonic wave emitted by the first ultrasonic emission module (21) being greater than the intensity of the ultrasonic wave emitted by the second ultrasonic emission module (211); An aeration component (3), configured to supply air towards the bottom of the housing (11), the generated micro-nano bubbles being able to be adsorbed and retained in the pores of the adsorption material, and being able to form an aerobic zone on the outer periphery of the housing (11), and at the same time being able to form an upward water flow inside the core tube (111) of the housing (11). In addition, the micro-nano bubbles also serve as cavitation nuclei generated by the cavitation effect.

2. The cavitation effect-enhanced biological reaction core according to claim 1, characterized in that, The cavitation effect strengthening component (2) further includes an ultrasonic controller (22), and the ultrasonic controller (22) is used to adjust the frequency and intensity of the ultrasonic waves emitted by the first ultrasonic emission module (21) and the second ultrasonic emission module (211).

3. The cavitation effect enhanced biological reaction core according to claim 1, characterized in that, The frequency of the ultrasonic wave emitted by the first ultrasonic wave transmitting module (21) is 20KHz - 80KHz, and the emission intensity is 0.2W / cm 2 - 0.5W / cm 2 , the emission frequency is 3 - 5 times per day, and / or The frequency of the ultrasonic wave emitted by the second ultrasonic wave transmitting module (211) is 20KHz - 80KHz, the emission intensity is 0.5W / cm 2 - 3W / cm 2 , and the emission frequency is 3 - 5 times per day.

4. The cavitation effect-enhanced biological reaction core according to claim 1, characterized in that The aeration component (3) includes a gas supply device and an aeration disc (31), the aeration disc (31) being arranged below the core material (12), and aeration holes being uniformly arranged on the aeration disc (31), and the micro-bubbles provided by the gas supply device being able to flow towards the core material (12) through the aeration holes; preferably, the aperture of the aeration holes is 0.1 - 50 μm, and the porosity is 40% - 60%; preferably, the bubble diameter of the air provided through the aeration holes is 100 nm - 10 μm.

5. The cavitation effect enhanced biological reaction core according to claim 4, characterized in that An isolation section (13) is arranged between the aeration disc (31) and the core material (12), and the isolation section (13) is arranged to allow micro-bubbles to pass through and be able to isolate the growth of microorganisms.

6. The cavitation effect enhanced biological reaction core according to claim 5, characterized in that, The isolation section (13) is filled with an antibacterial and oil-repellent particulate material; preferably, the oil-repellent particulate material includes modified cotton and linen of natural fiber type, hydrophilic group polyurethane of polymer type, etc.; preferably, the outer surface of the oil-repellent particulate material is coated with an antibacterial agent of silver, copper or zinc.

7. The cavitation effect-enhanced bioreaction core according to claim 5, wherein, The isolation section (13) is separated from the core material (12) by a perforated plate (14); preferably, the diameter of the perforated plate (14) is 90 mm - 150 mm, the sieve hole diameter is 0.8 - 1 mm, and the opening ratio is not less than 70%.

8. The cavitation effect-enhanced biological reaction core according to claim 4, characterized in that The housing (11) includes a sleeved core tube (111) and an outer sieve tube (112), the adsorption material is filled in the core tube (111), and the through-hole structure includes through-holes opened on the side walls of the core tube (111) and the outer sieve tube (112).

9. The photocatalytically enhanced bioreaction core according to claim 8, wherein, The core tube (111) includes a water inlet section (111-1), an upflow section (111-2), and a water outlet section (111-3). The water inlet section (111-1) is located at the end of the core tube (111) near the aeration disk (31). Circular sieve holes are formed on the side wall of the water inlet section (111-1), with a pore diameter of 2 mm - 3 mm, a pore spacing of 5 mm - 8 mm, and a section height of 200 mm - 800 mm. The upflow section (111-2) is located in the middle section of the core tube (111), and no holes are formed on the side wall of the upflow section (111-2), with a section height of 600 mm - 5000 mm. The water outlet section (111-3) is located at the top of the core tube (111), and circular sieve holes are formed on the side wall of the water outlet section (111-3), with a pore diameter of 2 mm - 3 mm, a pore spacing of 5 mm - 8 mm, and a section height of 200 mm - 800 mm.

10. The cavitation effect enhanced biological reaction core according to claim 8, characterized in that, The air supply device includes an air supply pump (32) and an air supply pipeline (33). The air supply pipeline (33) passes through the annular space between the core tube (111) and the outer sieve tube (112).

11. The cavitation effect-enhanced bioreaction core according to claim 10, characterized in that, The housing (11) further includes a control box (15) arranged at the top of the core tube (111) and the outer sieve tube (112). The air supply pump (32) is arranged in the control box (15); and / or, The ultrasonic controller (22) of the cavitation effect strengthening member (2) is arranged in the control box (15).

12. The cavitation effect-enhanced biological reaction core according to claim 11, wherein, The biological reaction core further includes an energy supply member (4) arranged on the control box (15). The energy supply member (4) is used to supply energy to the air supply pump (32) and the cavitation effect strengthening member (2).

13. The cavitation effect-enhanced biological reaction core according to claim 12, characterized in that, The energy supply member (4) includes a photovoltaic panel (41), a storage battery (42), and a power conversion controller (43). One end of the power conversion controller (43) is electrically connected to the photovoltaic panel (41), and the other end is electrically connected to the storage battery (42). The power output end of the power conversion controller (43) is electrically connected to the air supply pump (32) and the cavitation effect strengthening member (2). The photovoltaic panel (41) serves as the top cover of the control box (15); preferably, the photo-electric conversion material of the photovoltaic panel (41) is single-crystalline silicon, amorphous silicon, or Cu(In,Ga)Se2 thin film.

14. The cavitation effect-enhanced biological reaction core according to claim 13, characterized in that, The biological reaction core further includes an environmental on-line monitoring member (5). The environmental on-line monitoring member (5) is used to monitor the operating state of the biological core material member (1), and the environmental on-line monitoring member (5) can adjust the working parameters of the aeration member (3) and the cavitation effect strengthening member (2) according to the monitored operating state of the biological core material member (1).

15. The cavitation effect-enhanced bioreaction core according to claim 1, wherein The adsorption material includes one or more of carbon-based materials, porous ceramsite, molecular sieves, and carbon nanotubes.

16. The cavitation effect-enhanced biological reaction core according to claim 1, characterized in that, The particle size of the adsorption material is 2-3 mm, wherein the proportion of micropores is 30%-40%, the proportion of mesopores is 30%-40%, and the proportion of macropores is 30%-50%; preferably, the density of the adsorption material is 1.05 g / cm 3 -1.1 g / cm 3 .

17. A biological reaction system enhanced by cavitation effect, characterized in that, It includes a plurality of cavitation effect strengthened biological reaction cores as described in any one of claims 1 to 16.

18. The biological reaction system enhanced by cavitation effect according to claim 17, characterized in that, The influence diameter of the biological reaction core is 3-5 m, so as to form a cylindrical aerobic zone on the outer periphery of the housing (11), and the cylindrical aerobic zones of the plurality of biological reaction cores are arranged in a tangential or intersecting manner.

Images