A method for assembling a photobioreactive intelligent sterilizing fiber module and its device application

Abstract

The present invention provides a method for assembling a photobioreactor-type intelligent sterilization fiber module and an application of a device. A photobioreactor-type intelligent sterilization fiber module includes a reactor glass main body, a housing surrounding the main body, and a light control module for controlling the rotation of the reactor; the reactor main body is composed of a plurality of glass plates and fiber diaphragms, and is divided into a heat insulation area and an algae cultivation area. Inlet and outlet water pipes are arranged in the algae cultivation area. A transmission structure controlled by the light control module is connected to the housing. An air outlet is arranged on the glass plate in the algae cultivation area, and a purification module is installed on the air outlet. A photoreactor designed by the present invention can promote the growth of microalgae. The assembly method of the device can be used for various water qualities, such as open-pit mine water, surface water treatment, and algae resource utilization processes, and can also be applied to the removal of pathogenic bioaerosols and organic malodorous gases in the air, having the effect of improving air and water quality, being suitable for various indoor and outdoor scenarios, being economically feasible, and having broad prospects.

Description

Technical Field

[0001] The present invention belongs to the technical field of resource environment, and particularly relates to a method for assembling a photobioreactor type intelligent sterilization fiber module and an application of a device thereof. Background Art

[0002] With the rapid development of social economy in recent years, people's attention to the environment has gradually increased. In particular, the concerns about a series of environmental problems brought about by the excessive consumption of fossil fuels have forced people to urgently seek a new environmentally friendly alternative energy source. As a new type of green carbon-neutral energy, bioenergy is increasingly being emphasized. Microalgae belong to the third generation of biomass and are more environmentally friendly and efficient than food and wood in various aspects. Therefore, technologies related to the cultivation of microalgae and energy collection have been more widely studied. Currently, the main ways to cultivate microalgae are open and closed types. Among them, the closed type mainly uses photobioreactors to cultivate microalgae. However, the gas-liquid mass transfer effect inside the reactor is poor, the illumination received by the microalgae is uneven, and the temperature of the internal algal liquid changes greatly, which are all not conducive to the growth of microalgae. The reactor is often in the shape of a cuboid and cannot be assembled into different styles according to needs when used on building exteriors. Moreover, there are large dead zones in the reactor. At the same time, people's requirements for a good indoor air environment are also difficult to meet.

[0003] More than 70% of human time is spent indoors, and microorganisms are one of the sources of indoor environmental pollution. There are many types of microorganisms in the air, such as cocci, bacilli, and molds. Usually, pathogenic microorganisms with relatively weak resistance are diluted by the air and are easily killed under sunlight irradiation and dry conditions. However, opportunistic pathogens can often be found in indoor air and cause human diseases under specific environmental conditions, such as Mycobacterium tuberculosis, Corynebacterium diphtheriae, and influenza viruses. Research has found that these pathogenic microorganisms can attach to dust and spread in the air, enter the room through indoor doors and windows, and infect people who are active indoors. Most of the existing devices that can remove pathogenic bacteria in the air use chemical sterilization methods, and the chemical drugs need to be replaced regularly.

[0004] Therefore, it is necessary to invent an assembly method and application based on an algal photobioreactor device, which couples the capture of air-borne pathogenic bioaerosols, municipal water treatment, and microalgae production; combines antibacterial fiber membrane technology to improve air quality, promotes the improvement of indoor and outdoor air biological safety, meets the needs of energy conservation, carbon reduction, and human health, and is economically feasible with broad application prospects. Summary of the Invention

[0005] In view of the deficiencies in the prior art, the present invention proposes a method for assembling a photobioreactor-based intelligent sterilizing fiber module and its device application. The turbulators on the front glass plate and the middle glass plate can change the flow state of the internal liquid, improve the gas-liquid mass transfer effect inside the reactor, promote the removal of bioaerosols in the air and the efficiency of the photobioreactor. At the same time, the fiber membrane covered inside can not only play a self-cleaning role but also selectively kill pathogenic bacteria. The phototactic rotating device proposed by the present invention has the effect of increasing the algal propagation rate. The sterilization module can remove bioaerosols, release beneficial substances, improve air quality, reduce the amount of indoor pathogenic bacteria, and improve safety.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A method for assembling a photobioreactor-based intelligent sterilizing fiber module and its device application, comprising a hollow structure composed of multiple glass plates and fiber membranes. It is characterized in that: the glass structure is composed of a rear glass plate, a middle glass plate and a front glass plate. A sealed heat-insulating layer is formed between the rear glass plate and the middle glass plate. The area between the middle glass plate and the front glass plate is an algal-bacterial co-culture area. And at the bottom of the glass in the algal-bacterial co-culture area, there are a water inlet, a water outlet and a flow-pushing device. The multi-layer glass structure is surrounded and fixed by an outer frame, and on the outer frame, there are socket-type transmission structures symmetrically distributed on the left and right. The transmission structure is connected to an external light control module. On the right side of the outer frame, there are a water outlet hole, a water inlet hole and a flow-pushing device wire inlet hole.

[0008] Furthermore, on the glass plates, turbulators are provided on the side facing the algal-bacterial co-culture area, which can change the flow state of the algal liquid in the structure, improve the efficiency of the gas-liquid device, and enable the microalgae to receive light more uniformly.

[0009] Furthermore, the turbulators are hemispherical, but not limited to hemispherical, and they are arranged in a staggered manner on the glass plates.

[0010] Furthermore, long-lasting fluorescent substances are added to both the middle glass plate and the front glass plate, which are composed of Al2O3, SrO, Eu2O3, Dy2O3, B2O3, and SiO2, and there are multiple particle size divisions in the range of 3 - 35 μm. They can absorb light energy during the day and emit light at night to realize the night cultivation of microalgae.

[0011] Furthermore, on the side of the middle glass plate and the front glass plate facing the algal-bacterial co-culture area, fiber membranes are covered, which can not only play a self-cleaning role but also selectively kill pathogenic bacteria.

[0012] Furthermore, the fiber membrane is made of a high molecular polymer and modified light - seeking microorganisms (such as algae). The membrane surface has a micron - scale disordered nanostructure and is magnetic. The membrane pore diameter is not greater than 1 mm, and the thickness is between 0.001 - 10 mm. The contact angle between water and the fiber membrane is greater than 150°, and the fiber membrane can be replaced.

[0013] Furthermore, the plug - flow device can be replaced by an aeration device. The gas can be obtained from the indoor air. After treating the indoor air, oxygen - rich air is continuously input into the room.

[0014] Furthermore, the transmission structure is socket - type, including a socket groove, a socket protrusion, a blocking disk, a spring, and a transmission shaft. The socket groove and the socket protrusion can be closely fitted. The blocking disk is used to fix the whole structure in the building main body frame. The function of the spring is to separate the socket groove and the socket protrusion, facilitating the replacement of the reactor.

[0015] Furthermore, the rotation of the transmission shaft is controlled by an external light - control module, which can adjust the tilt angle of the photobioreactor in real time according to the direction of light.

[0016] Furthermore, exhaust holes are provided on the front glass plate, and it can be fixed to the sterilization module by pressing.

[0017] Furthermore, the sterilization module consists of an upper cover of the sterilization module, a ventilation net, a lower cover of the sterilization module, and a base of the sterilization module. The upper cover and the lower cover of the sterilization module can be closely fitted, and materials with functions of sterilization, adsorption, and release of negative oxygen ions are placed inside.

[0018] The beneficial effects of the present invention:

[0019] 1. The present invention realizes innovation in the field of resource and environmental technology applications. With a microalgae photobioreactor as the core, assisted by a sterilization module and a light - control module, the device has the effects of removing biological aerosols in the air, rotating following the light source, and enhancing the light effect. The sterilization module also has the functions of deodorization and releasing beneficial substances into the air, which can improve the indoor environment. The microalgae photosynthetic reaction can produce oxygen, realizing the timely replenishment of oxygen - rich air into the room.

[0020] 2. This device can work for a long time, fix CO2 in the air, and contribute to carbon neutrality. At the same time, it has a good purification effect on various pollutants in the air, effectively improving the comfort and safety of indoor air.

[0021] 3. The photo-biological reaction type intelligent sterilization device designed by the present invention can not only be used for building envelope structures such as curtain walls, but also be used as windows. When used as a building curtain wall, it can reduce the building's heat load, play a role in heat insulation, and have a certain decorative effect on the building. It provides a green, economical and feasible alternative material for building exterior walls. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a flow chart of the device for microalgae cultivation;

[0023] Figure 2 is a schematic diagram of the overall structure of the photo-biological reaction type intelligent sterilization device of the present invention;

[0024] Figure 3 are the side view and front view of the glass plate of the photo-biological reaction type intelligent sterilization device;

[0025] Figure 4 is a schematic diagram of the structure of the sterilization module installed on the exhaust hole;

[0026] Figure 5 is a schematic diagram of the socket type transmission structure;

[0027] Figure 6 is a schematic diagram of the details of the pipelines at the bottom of the reactor;

[0028] Figure 7 is another shape of the turbulator on the glass and a microscopic diagram of the fiber membrane;

[0029] Figure 8 is a flow chart of the method for cultivating microalgae using the device.

[0030] In the figures: 1. Outer frame, 2. Rear glass plate, 3. Hermetic heat insulation layer, 4. Intermediate glass plate, 5. Front glass plate, 6. Algae-bacteria co-cultivation area, 7. Exhaust hole, 8. Sterilization module, 9. Socket type transmission structure, 10. Inlet hole for the flow-pushing device, 11. Outlet pipe hole, 12. Inlet pipe hole, 13. Outlet, 14. Inlet, 15. Flow-pushing device, 16. Light control module, 17. Turbulator, 18. Upper cover of the sterilization module, 19. Breathable net, 20. Lower cover of the sterilization module, 21. Base of the sterilization module, 22. Partially intercepted outer frame, 23. Socket groove, 24. Socket projection, 25. Blocking plate, 26. Spring, 27. Transmission shaft, 28. Fiber membrane. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of protection of the present invention.

[0032] Embodiment 1

[0033] As Figure 1 , when the device is used for microalgae cultivation, it is necessary to introduce the mixed liquid of wastewater containing nutrients and microalgae from the storage container ① into the photo-bioreactor intelligent sterilization device ③. Under the action of the light control module ②, the rotation of the photo-bioreactor intelligent sterilization device ③ can be adjusted to achieve the maximum utilization of light. When the amount of microalgae reaches a certain standard, the liquid in the reactor is introduced into the microalgae separation device ④ to separate the microalgae from it. The separated microalgae are then subjected to processes such as extraction to complete the extraction of products such as oils and carotenoids in the microalgae ⑤.

[0034] As Figure 2 , the device for microalgae cultivation mainly includes an outer frame 1, a rear glass plate 2, a sealed heat-insulating layer 3, an intermediate glass plate 4, a front glass plate 5, a co-cultivation area for algae and bacteria 6, an exhaust hole 7, a sterilization module 8, a socket-type transmission structure 9, a push-flow device inlet hole 10, an outlet pipe hole 11, an inlet pipe hole 12, an outlet 13, an inlet 14, a push-flow device 15 and a light control module 16. The glass-structured photo-bioreactor is surrounded and fixed by the stainless-steel outer frame 1. There is a space for pipelines to pass between the outer frame 1 and the photo-bioreactor. Socket-type transmission structures 9 are symmetrically arranged on both sides of the frame and are all controlled by the light control module 16. The light control module 16 can sense the direction of light, output signals to control the rotation of the main transmission shaft, and then drive the rotation of the transmission structure 9 to achieve the overall rotation of the device. The area where the device is provided with the exhaust hole 7 is used for microalgae cultivation. The bottom of the area is provided with an inlet 14, an outlet 13 and a push-flow device 15. The inlet pipe, outlet pipe and wires of the push-flow device can extend out through the outlet pipe hole 11, the inlet pipe hole and the push-flow device inlet hole 10 through the space between the outer frame 1 and the photo-bioreactor. The power of the push-flow device 15 should not be too large to ensure the full flow of the internal algal liquid. As Figure 2 , there is a hemispherical turbulator 17 on the intermediate glass plate 4, and at the same time, sterilization hydrophobic fiber membrane sheets 28 are evenly distributed on the glass plate. Figure 3 It is a schematic diagram of the hemispherical turbulator 17 on the front glass plate 5. At the same time, the intermediate glass plate 4 also has sterilization hydrophobic fiber membrane sheets 28.

[0035] Figure 4It is a schematic structural diagram of the sterilization module 8 installed on the exhaust hole. The sterilization module 8 is connected to the photobioreactor through the sterilization module base 21. The module consists of a sterilization module lower cover 20, a sterilization module upper cover 18, and a ventilation net 19. The gas inside the reactor passes through the ventilation net 19, and after passing through the fibers placed inside the module that can release negative oxygen ions and sterilize and deodorize, it enters the air. The internal sterilization fibers should be replaced in a timely manner according to the remaining efficacy.

[0036] As Figure 5 , the figure shows a partial schematic diagram of the socket-type transmission structure 9. There is a socket groove 23 on the riveted part located on the outer frame. The socket protrusion 24 can be closely combined with the socket groove 23. The blocking disc 25 can be arranged inside the main frame to prevent the riveting structure from falling off. The spring 26 is placed inside the structure. When the entire photobioreactor needs to be removed, pressing the socket protrusion 24 to compress the spring 26 can separate the socket groove 23 from the socket protrusion 24, achieving the purpose of removing the entire device. In the fiber membrane 28 of the middle glass plate 4 and the front glass plate 5, a photoluminescent fluorescent algae substance is added to absorb and store solar energy and maintain its luminescence time. This method can solve the problem of algae cultivation at night without the need to additionally increase energy. After the device is assembled, it can be installed on the exterior wall of a building or used as an indoor window. When used on the exterior wall of a building, if not needed, the sterilization module 8 can be not added. When used indoors, the flow-pushing device 15 can be replaced with an aeration device.

[0037] Embodiment 2

[0038] As Figure 2 The shown device can be used as an indoor window. It is fixed to the wall through the socket-type transmission structure 9. It can rotate the window manually or through the light control module 16, making full use of light to improve the growth rate of microalgae. When used indoors, the main nutrients for microalgae growth come from the mixed liquid of sludge and rainwater mixed in a ratio of 1:2. First, the sludge and rainwater are mixed in a ratio of 1:2 in the adjustment tank, and then they enter the algae-bacteria co-cultivation area 6 through the water inlet hole 12 of the water inlet 14 together with the culture solution containing Chlorella (Scenedesmus or other algal species can be selected according to needs). The water inflow should be controlled at 10 cm below the exhaust hole 7. The flow-pushing device 15 is changed to an aeration device. The microalgae in the algal liquid conduct preliminary treatment on the gas. Most of the pathogenic bacteria in the preliminarily treated gas have been removed. After passing through the sterilization module 8, most of the bacteria in the air can be removed, and negative oxygen ions can be released to remove odors. The air entering the room through the exhaust hole 7 is excellent in improving the indoor environment and enhancing biological safety.

[0039] After two weeks of continuous aeration cultivation, the microalgae mixed solution in the cultivation area is discharged through the water outlet 13, and the water discharge should be controlled at 50% of the total water volume. Then, the mixed solution of sludge and rainwater is mixed and introduced again through the water inlet 14 at a ratio of 1:1. The ratio of the subsequent influent sludge to rainwater is maintained at 1:1. Since the water has not been completely drained, there is still a sufficient amount of Chlorella in the device. Therefore, it is no longer necessary to mix and introduce it into the algae-bacteria co-cultivation area 6 with the Chlorella culture solution in the subsequent process.

[0040] Because fiber diaphragm 28 is distributed on both the front glass plate 5 and the middle glass plate 4, it can play a self-cleaning role. The self-cleaning and sterilization properties of the fiber diaphragm 28 mainly come from the nano-structure on its surface. When water contacts the surface, it cannot stay because the contact angle is greater than 150°, and the water can also carry away the debris on the surface during the flow process. When replacing the reactor, the microalgae mixed solution in the device should be completely drained through the water outlet 13 first, and then the inlet and outlet pipelines and the aeration pipeline should be separated from the main frame. When pressing the socket protrusion 24 to separate from the outer frame 1, the same operation method is used on both sides of the outer frame 1. When both the socket-type transmission structures 9 on both sides are separated, the device can be successfully separated from the main body.

[0041] The sterilizing fiber in the sterilization module 8 can be replaced according to the actual situation, and the whole module can also be replaced. The form of the flow disturbing body on the glass is not limited to Figure 3 and Figure 7 the form in, and its layout method is not limited to this either.

[0042] Embodiment 3

[0043] According to one aspect of the present invention, there is provided an energy-saving and environmentally friendly photobioreactor type intelligent sterilizing fiber device that can be used for building exterior walls. As shown in Figure 2 the device, the reactor is connected with a light control module 16 to control the reactor to adjust the rotation angle following the light. When the device is used for the stadium curtain wall, it can be selected whether to install the sterilization module 8 according to needs. The overall frame of the curtain wall is in a honeycomb shape for installing the reactor module. The main frame is welded by hollow steel components and is used for placing pipelines inside. The glass used in the reactor of the present invention can be tempered glass with high light transmittance, so that microalgae can receive more light. The present invention is used for the stadium curtain wall, which can reduce the indoor light intensity and lower the indoor temperature in summer. The flow-pushing device 15 placed at the bottom of the reactor can be replaced with an aeration device. After installing the sterilization module 8, the air passing through the sterilization module 8 can increase the fresh air volume indoors. The device has an insulating air cavity, which can also play a heat preservation effect in winter to maintain the indoor temperature and at the same time has a certain sound insulation effect.

[0044] In addition, the outer frame 1 of the reactor is made of stainless steel welded together, which can protect the glass reactor and at the same time facilitate the installation of the reactor on the curtain wall frame. The reactor has phototaxis under the control of the light control module 16, which can improve the cultivation rate of the internal microalgae. When the biomass of the microalgae reaches a certain level, part of the algal liquid inside is discharged through the water outlet 13 at the bottom of the reactor to harvest the biomass.

[0045] Example 4

[0046] As Figure 8 shown, an example of a method for cultivating microalgae using this device is provided.

[0047] Step S1, the municipal sewage and the excess sludge are respectively passed through a filtering device to remove impurities in the water, and then the excess sludge is subjected to ultrasonic crushing treatment. The ultrasonic crusher used is the American sonics ultrasonic crusher VCX500 with a power of 500W, and the volume of the sample to be treated can be from 150 mL to several liters;

[0048] Step S2, the treated municipal sewage and excess sludge are mixed in a ratio of 2:1, and a concentrated Chlorella solution is inoculated, and then the mixed solution is introduced into the photobioreactor. Due to the size limitation of the reactor set in the experiment, 2 L of the treated municipal sewage and 1 L of the excess sludge are introduced. Natural light is used, and no additional lighting equipment is required;

[0049] Step S3, 10% carbon dioxide aeration is adopted, and the initial aeration efficiency is 500 mL / min. During the cultivation process, the carbon dioxide aeration volume in the photobioreactor is gradually increased;

[0050] Step S4, after 18 days of cultivation, the Chlorella concentration reaches about 2 g / L. At this time, 50% of the liquid in the photobioreactor is discharged, and the Chlorella mixed solution is treated by centrifugation to harvest the Chlorella biomass. While discharging the liquid, the treated municipal sewage and the excess sludge are introduced into the photobioreactor in a ratio of 1:1 to supplement the discharged mixed solution and increase the nutrients;

[0051] Step S5, due to the acclimation cultivation of Chlorella in the previous stage, Chlorella has adapted to the growth environment at this stage, and the removal efficiency of pollutants in the water body has increased. 50% of the Chlorella mixed solution can be discharged after 12 days of cultivation, and at the same time, the treated municipal sewage and the excess sludge are added in a ratio of 1:1. Thereafter, the cultivation cycle of Chlorella can be controlled at 12 days to obtain the maximum Chlorella harvest ratio.

[0052] Preferably, the municipal sewage does not contain toxic and harmful substances to ensure the normal growth of Chlorella.

[0053] Preferably, the excess sludge is the sludge discharged by the urban sewage treatment plant in the past week.

[0054] Preferably, the Chlorella is cultured in a photobioreactor with good light transmittance and sufficient aeration.

[0055] Preferably, the aeration volume can be appropriately adjusted according to the algal species used and the culture conditions.

[0056] It should be understood that the present invention does not limit its application to the detailed structure and arrangement of the components presented herein. The present invention is capable of having other embodiments and can be implemented and executed in various ways. The foregoing variations and modifications fall within the scope of the present invention. It should be understood that the present invention as disclosed and defined herein extends to all alternative combinations of two or more separate features mentioned or apparent in the text or drawings. All such different combinations constitute various alternative aspects of the present invention. The embodiments described herein illustrate the best mode known for practicing the present invention and will enable those skilled in the art to utilize the present invention.

Claims

1. A photobioreactor intelligent sterilization device, comprising an outer frame, a rear glass plate, a sealed heat insulation layer, a middle glass plate, a front glass plate, an algae-bacteria co-culture area, exhaust holes, a sterilization module, a socket type transmission structure, a water inlet hole for the flow-pushing device, a water inlet pipe hole, a water outlet pipe hole, a water inlet, a water outlet, a flow-pushing device and a light control module; a hollow structure is formed by the rear glass plate, the middle glass plate and the front glass plate; a sealed heat insulation layer is arranged between the rear glass plate and the middle glass plate; the area between the middle glass plate and the front glass plate is the algae-bacteria co-culture area, and a water inlet, a water outlet and a flow-pushing device are arranged at the bottom of the glass plates in the algae-bacteria co-culture area; the hollow structure is surrounded and fixed by the outer frame, the socket type transmission structures are symmetrically distributed on the left and right of the outer frame, the socket type transmission structure is connected with an external light control module, and a water inlet pipe hole, a water outlet pipe hole and a water inlet hole for the flow-pushing device are arranged on the right side of the outer frame; turbulators are arranged on one side of the middle glass plate and the front glass plate facing the algae-bacteria co-culture area; fluorescent substances are added to the middle glass plate and the front glass plate, which can absorb light energy during the day and emit light at night to realize the night cultivation of microalgae; fiber membrane sheets are covered on one side of the middle glass plate and the front glass plate facing the algae-bacteria co-culture area, and the fiber membrane sheets can not only play a self-cleaning role, but also selectively kill pathogenic bacteria; the rotation of the socket type transmission structure is controlled by an external light control module, and the inclination angle of the hollow structure can be adjusted in real time according to the direction of the light; exhaust holes are arranged on the front glass plate, and the sterilization module is fixed on the exhaust holes by pressing.

2. The optobioreactive intelligent sterilization device according to claim 1, characterized in that: The turbulator is hemispherical and is arranged in a staggered manner on the hollow glass plate and the front glass plate.

3. The optobioreactive intelligent sterilization device according to claim 1, characterized in that: The flow-pushing device is replaced by an aeration device, and gas is obtained from the room. After processing the indoor air, oxygen-rich fresh air is continuously input into the room.

4. The optobioreactive intelligent sterilization device according to claim 1, wherein: The sterilization module is composed of an upper cover of the sterilization module, a breathable net, a lower cover of the sterilization module and a base of the sterilization module. The upper cover of the sterilization module and the lower cover of the sterilization module are closely attached, and materials with the functions of sterilization, adsorption and release of negative oxygen ions are placed inside, which are used to remove air biological aerosols, release beneficial substances, improve air quality, reduce the number of indoor pathogenic bacteria and improve safety.

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