Landscape lighting and outdoor algae ecological'light tree 'bioreactor

Abstract

The invention discloses a landscape illumination and outdoor algae ecological'light tree 'integrated bioreactor, which can provide illumination for algae by utilizing sunlight in the daytime, and can provide necessary illumination conditions for microalgae by utilizing artificial light sources such as street lamps and automobile light at night, and meanwhile, energy is saved. Through efficient photosynthesis, the reactor can remarkably absorb CO2 in the atmosphere, and greenhouse gas emission is reduced. The bioreactor further comprises a landscape lighting device, soft green light can be emitted at night by means of street lamps, the attractive landscape effect is formed, and the night visual attraction of a city is improved. The CO2 supply device ensures that the algae grow in a proper environment through CO2 absorbers arranged around the main body structure. The overall design not only has an environmental protection function, but also can be used as a part of urban landscape, enhances the aesthetic property and environmental awareness of cities, and is suitable for various outdoor environments such as urban green lands, parks and streets.

Description

Technical Field

[0001] The invention relates to the field of bioengineering technology, and in particular to an outdoor algae ecological "light tree" bioreactor combined with landscape lighting function, which is used for efficiently absorbing carbon dioxide (CO2) in the atmosphere and generating bioenergy. Background Art

[0002] While conventional air purification technologies and carbon capture methods have mitigated these issues to some extent, they are often costly and have limited efficiency.

[0003] In recent years, microalgae have attracted widespread attention due to their rapid growth, high photosynthetic efficiency and strong CO2 absorption capacity. As an emerging environmental protection technology, algae bioreactors absorb CO2 from the air by cultivating specific species of microalgae and convert it into biomass or biofuel. However, existing algae bioreactors mostly adopt a closed design, occupy a large area, and have high requirements for lighting conditions, making it difficult to achieve large-scale urban applications.

[0004] On the other hand, urban landscape lighting is an indispensable part of modern cities, but traditional lighting systems consume a lot of electricity, increasing the energy burden of cities. Although the application of energy-saving light sources such as LEDs has reduced energy consumption to a certain extent, how to further improve the environmental protection and functionality of urban lighting remains a challenge.

[0005] The present invention aims to solve the above problems and proposes a new type of outdoor algae ecological "light tree" bioreactor, which can not only effectively absorb CO2 in the atmosphere, but also use the existing urban infrastructure (such as street lights, vehicle exhaust emissions, etc.) to provide the necessary lighting and CO2 source. At the same time, by integrating landscape lighting functions, the equipment can glow at night, becoming a beautiful landscape in the city, enhancing the public's environmental awareness and sense of participation. Summary of the invention

[0006] In view of the shortcomings of the prior art, the present invention provides an integrated landscape lighting and outdoor algae ecological "light tree" bioreactor, the technical advantages of which are:

[0007] 1. Efficient CO2 absorption

[0008] Utilization of natural and artificial light sources: The bioreactor can utilize natural light and artificial light sources (such as street lights, car lights) for photosynthesis, significantly improving the CO2 absorption efficiency.

[0009] Multi-point absorption: By setting up CO2 absorbers around the road, CO2 in the air can be captured from multiple directions and heights, further improving the absorption effect.

[0010] 2. Energy saving and environmental protection

[0011] Energy-saving landscape lighting: no additional lighting system is required, and street lights, car lights or sunlight are directly used.

[0012] 3. Urban beautification

[0013] Landscape effect: It emits soft green light at night, forming a unique urban landscape and enhancing the beauty of the city.

[0014] Multifunctionality: It not only has environmental protection function, but also can be used as decoration for urban green spaces, parks and streets, increasing the greening rate and ornamental value of the city.

[0015] 4. Modular design

[0016] Flexible assembly: Modular design supports flexible assembly and expansion according to different application scenarios to meet the needs of various sites.

[0017] Easy to maintain: The modular design makes maintenance and overhaul more convenient. If a single module has a problem, it can be replaced individually without affecting the overall operation.

[0018] 5. Resource recycling

[0019] Bioenergy production: By efficiently cultivating algae, biofuels or high-value bioproducts can be produced, realizing the recycling of resources.

[0020] Water purification: Algae can absorb nutrients in water during their growth and can be used to treat urban sewage and improve water quality.

[0021] 6. Social Impact

[0022] Improve environmental awareness: As part of the urban landscape, bioreactors can draw public attention to environmental protection and enhance citizens' environmental awareness.

[0023] Educational value: It can be used as a demonstration project for environmental education, showing the concepts and technologies of sustainable development to students and the public.

[0024] 7. Microalgae cultivation technology

[0025] The microalgae culture is combined with the hollow fiber membrane, and the specific surface area of ​​the membrane is used to provide a carrier for the growth of microalgae.

[0026] The culture medium and CO2 mixed gas are passed inside and outside the hollow fiber membrane to induce the microalgae to form biofilm, proliferate and expand; and to avoid the conversion of CO2 into HCO3 - and CO3 2 - Acidify the culture medium, improve the direct gas phase CO2 absorption and bioconversion of microalgae, and promote the expansion and reproduction of microalgae.

[0027] The cylindrical tank design with a large ratio of height to diameter allows a large surface area of ​​hollow fiber membrane carriers to be placed per unit volume, thus achieving high-density farming.

[0028] The present invention adopts the following technical solutions:

[0029] An integrated landscape lighting and outdoor algae ecological "light tree" bioreactor, characterized by: comprising a transparent tank made of transparent material, embedded with refractive fibers and hollow fibers, equipped with a CO2 supply device, a circulation pump and filter, a temperature sensor and a pH sensor, an aeration system, etc.; the refractive fibers are used to introduce external light sources and evenly distribute them throughout the bioreactor to provide microalgae with a suitable growth environment with sufficient light and carbon sources, thereby promoting the rapid growth of microalgae. .

[0030] The refractive fiber and the hollow fiber are designed to be an integrated packaging component, and the ratio of the refractive fiber to the hollow fiber is 1:1, 1:2, 1:3, etc.

[0031] The integrated landscape lighting and outdoor algae ecological "light tree" bioreactor is characterized in that: the entire reactor does not need its own light source system, the reactor can be placed under a street lamp, and the light source of the street lamp can be directly used at night; during the day: the light collecting device located at the top of the trunk structure can automatically track the changes in the position of the sun, and focus the sunlight through optical elements and introduce it into the refractive fiber.

[0032] The refractive fiber is made of a high refractive index material, can be transmitted over a long distance, introduces an external light source into the reactor, and evenly distributes the light source into the reactor, thereby providing necessary lighting conditions for the microalgae.

[0033] The refractive fiber may be made of a material with high transparency and high refractive index, such as polymethyl methacrylate (PMMA), polycarbonate (PC) or other special optical fiber materials; the outer diameter of the refractive fiber is 1.0 mm-10 mm.

[0034] The CO2 supply device includes one or more CO2 absorbers, which are arranged at the bottom or around the main structure and can efficiently absorb CO2 from the air on the road and transport it to the algae cultivation unit.

[0035] The light-transmitting reactor is cylindrical and made of transparent materials such as polymethyl methacrylate (acrylic or plexiglass PMMA plastic), polycarbonate (PC plastic), polyethylene terephthalate (PET), transparent nylon, AS (acrylonitrile-styrene copolymer), plexiglass, inorganic glass, polyvinyl chloride (PVC), etc., with a diameter of 0.1-0.5 meters, a height of 0.5-2.5 meters, and a thickness of 0.5-2.0 centimeters.

[0036] The hollow fiber membrane assembly is composed of a hollow fiber homogeneous membrane and a hollow fiber braided tube reinforced composite membrane, and the pore size of the hollow fiber membrane is 0.1-1000nm, the outer diameter of the hollow fiber is 0.2-2mm, and the inner diameter is 0.1-1.5mm; the material of the hollow fiber includes any one or a composite combination of polytetramethylpentene, polypropylene, polyethylene, polytetrafluoroethylene, polyetheretherketone, polysilicone resin, polydimethylsiloxane, polyvinylidene fluoride, polyurethane, polyester, polyamide, polyimide, polyetherimide (PEI), polysulfone, polyethersulfone, polyethylene-polyvinyl alcohol copolymer (EVOH), polylactic acid, cellulose acetate (CA), nylon and glass fiber;

[0037] The surface treatment process of the hollow fiber membrane makes it not only have good biocompatibility, but also have excellent selective permeability and mechanical strength, suitable for long-term operation and not easy to be damaged.

[0038] The integrated landscape lighting and outdoor algae ecological "light tree" bioreactor is characterized in that a structure is designed at the bottom to facilitate the collection of microalgae biomass products, such as a sedimentation tank or a filter, to simplify the harvesting process.

[0039] The integrated landscape lighting and outdoor algae ecological "light tree" bioreactor is characterized in that the overall frame adopts a modular design, supports flexible assembly and expansion according to different application scenarios, and has a viewing lighting module that emits soft green light at night, which is both visually attractive and does not cause light pollution.

[0040] High-efficiency self-luminous fiber "light tree" bioreactor and its microalgae cultivation technology, the reactor can be applied to industrial waste gas treatment, greenhouse gas emission reduction, bioenergy production, aquaculture wastewater and other fields. The CO2 capture technology is organically combined with CO2 biosynthesis and resource utilization technology to achieve efficient CO2 capture and resource utilization, forming a two-way promotion technology system. This technology not only helps to control environmental pollution, but also realizes the benign carbon cycle of CO2.

[0041] The significant advantages and beneficial effects of the above technical solution of the present invention are as follows:

[0042] 1. Efficient CO2 absorption

[0043] Utilization of natural and artificial light sources: The bioreactor can utilize natural light and artificial light sources (such as street lights, car lights) for photosynthesis, significantly improving the CO2 absorption efficiency.

[0044] Multi-point absorption: By setting up CO2 absorbers around the road, CO2 in the air can be captured from multiple directions and heights, further improving the absorption effect.

[0045] 2. Energy saving and environmental protection

[0046] Energy-saving landscape lighting: no additional lighting system is required, and street lights, car lights or sunlight are directly used.

[0047] 3. Urban beautification

[0048] Landscape effect: It emits soft green light at night, forming a unique urban landscape and enhancing the beauty of the city.

[0049] Multifunctionality: It not only has environmental protection function, but also can be used as decoration for urban green spaces, parks and streets, increasing the greening rate and ornamental value of the city.

[0050] 4. Modular design

[0051] Flexible assembly: Modular design supports flexible assembly and expansion according to different application scenarios to meet the needs of various sites.

[0052] Easy to maintain: The modular design makes maintenance and overhaul more convenient. If a single module has a problem, it can be replaced individually without affecting the overall operation.

[0053] 5. Resource recycling

[0054] Bioenergy production: By efficiently cultivating algae, biofuels or high-value bioproducts can be produced, realizing the recycling of resources.

[0055] Water purification: Algae can absorb nutrients in water during their growth and can be used to treat urban sewage and improve water quality.

[0056] 6. Social Impact

[0057] Improve environmental awareness: As part of the urban landscape, bioreactors can draw public attention to environmental protection and enhance citizens' environmental awareness.

[0058] Educational value: It can be used as a demonstration project for environmental education, showing the concepts and technologies of sustainable development to students and the public.

[0059] 7. Microalgae cultivation technology:

[0060] The microalgae culture is combined with the hollow fiber membrane, and the specific surface area of ​​the membrane is used to provide a carrier for the growth of microalgae.

[0061] The culture medium and CO2 mixed gas are passed inside and outside the hollow fiber membrane to induce the microalgae to form biofilm, proliferate and expand; and to avoid the conversion of CO2 into HCO3 - and CO3 2 - Acidify the culture medium, improve the direct gas phase CO2 absorption and bioconversion of microalgae, and promote the expansion and reproduction of microalgae.

[0062] The cylindrical tank design with a large ratio of height to diameter allows a large surface area of ​​hollow fiber membrane carriers to be placed per unit volume, thus achieving high-density farming. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 A scene diagram of an integrated landscape lighting and outdoor algae ecological "light tree" bioreactor DETAILED DESCRIPTION

[0064] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] Embodiment 1:

[0066] The ratio of refractive fiber to hollow fiber membrane is 1:1, wherein the outer diameter of the refractive fiber is 1.0 mm, the average pore size of the polysulfone hollow fiber membrane is 10 nm, the outer diameter of the hollow fiber is 0.2 mm, and the inner diameter is 0.1 mm; the light-transmitting reactor is cylindrical, made of resin glass, with a diameter of 0.3 m, a height of 1 m, and a thickness of 1 cm.

[0067] The above-mentioned polysulfone hollow fiber membrane and refractive fiber are made into an assembly and placed in a transparent tank to construct a CO2 capture and carbon fixation microalgae cultivation membrane bioreactor; when the microalgae are mature, the microalgae can be collected by flushing by adjusting the flow rate of the nutrient solution; the microalgae are then collected and concentrated by filtration, and the obtained microalgae can be used as biodiesel raw materials after post-processing.

[0068] Embodiment 2:

[0069] The ratio of the refractive fiber to the polyethylene hollow fiber membrane is 1:1, wherein the outer diameter of the refractive fiber is 2.0 mm, the average pore size of the polyethylene hollow fiber membrane is 50 nm, the outer diameter of the hollow fiber is 1.0 mm, and the inner diameter is 0.8 mm; the light-transmitting reactor is cylindrical, with a diameter of 0.5 m, a height of 1.5 m, and a thickness of 1 cm; the rest is consistent with Example 1.

[0070] Embodiment 3:

[0071] The ratio of the refractive fiber to the polydimethylsiloxane hollow fiber membrane is 1:4, wherein the outer diameter of the refractive fiber is 5.0 mm, the average pore size of the polydimethylsiloxane hollow fiber membrane is 200 nm, the outer diameter of the hollow fiber is 1.0 mm, and the inner diameter is 0.6 mm; the light-transmitting reactor is cylindrical, with a diameter of 0.5 m, a height of 2 m, and a thickness of 1 cm; the rest is consistent with Example 1.

[0072] Embodiment 4:

[0073] The ratio of the refractive fiber to the polyetheretherketone hollow fiber membrane is 1:2, wherein the outer diameter of the refractive fiber is 1.0 mm, the average pore size of the polyetheretherketone hollow fiber membrane is 20 nm, the outer diameter of the hollow fiber is 1.4 mm, and the inner diameter is 1.0 mm; the light-transmitting reactor is cylindrical, with a diameter of 0.7 m, a height of 1.5 m, and a thickness of 2 cm; the rest is consistent with Example 1.

[0074] Embodiment 5:

[0075] The ratio of the refractive fiber to the polytetrafluoroethylene hollow fiber membrane is 1:2, wherein the outer diameter of the refractive fiber is 10 mm, the average pore size of the polytetrafluoroethylene hollow fiber membrane is 20 nm, the outer diameter of the hollow fiber is 1.4 mm, and the inner diameter is 1.0 mm; the light-transmitting reactor is cylindrical, with a diameter of 0.7 m, a height of 1.5 m, and a thickness of 2 cm; the rest is consistent with Example 1.

Claims

1. A "light tree" bioreactor integrating landscape lighting and outdoor algae ecology, characterized by: It includes a transparent tank made of transparent material, embedded with refractive fibers and hollow fibers, equipped with a CO2 supply device, a circulation pump and filter, a temperature sensor and a pH sensor, an aeration system, etc.; the refractive fibers are used to introduce an external light source and evenly distribute it throughout the bioreactor to provide the microalgae with a suitable growth environment with sufficient light and carbon source, thereby promoting the rapid growth of the microalgae.

2. The refractive fiber and the hollow fiber according to claim 1 are designed as an integrated packaging element, and the ratio of the refractive fiber to the hollow fiber is 1:1, 1:2, 1:3, etc.

3. The integrated landscape lighting and outdoor algae ecological "light tree" bioreactor according to claim 1 is characterized by: The entire reactor does not need its own light source system. The reactor can be placed under a street lamp and directly use the light source of the street lamp at night. During the day: A light-collecting device located at the top of the main structure automatically tracks the changes in the sun's position and focuses the sunlight through optical elements and directs it into refractive fibers.

4. According to claim 1, the refractive fiber is made of a high refractive index material, can be transmitted over a long distance, introduce an external light source into the reactor, and evenly distribute the light source inside the reactor, thereby providing the necessary lighting conditions for the microalgae.

5. The refractive fiber according to claim 1 can be made of materials with high transparency and high refractive index, such as polymethyl methacrylate (PMMA), polycarbonate (PC) or other special optical fiber materials; the outer diameter of the refractive fiber is 1.0 mm-10 mm.

6. According to claim 1, the CO2 supply device comprises one or more CO2 absorbers, which are arranged at the bottom or around the main structure and can efficiently absorb CO2 from the air on the road and transport it to the algae cultivation unit.

7. The light-transmitting reactor according to claim 1 is cylindrical, made of transparent materials such as polymethyl methacrylate (acrylic or plexiglass PMMA plastic), polycarbonate (PC plastic), polyethylene terephthalate (PET), transparent nylon, AS (acrylonitrile-styrene copolymer), plexiglass, inorganic glass, polyvinyl chloride (PVC), etc., with a diameter of 0.1-0.5 meters, a height of 0.5-2.5 meters, and a thickness of 0.5-2.0 centimeters.

8. The hollow fiber membrane assembly according to claim 1 is composed of a hollow fiber homogeneous membrane and a hollow fiber braided tube reinforced composite membrane, and the pore size of the hollow fiber membrane is 0.1-1000nm, the outer diameter of the hollow fiber is 0.2-2mm, and the inner diameter is 0.1-1.5mm; the material of the hollow fiber includes any one or a composite combination of polytetramethylpentene, polypropylene, polyethylene, polytetrafluoroethylene, polyetheretherketone, polysilicone resin, polydimethylsiloxane, polyvinylidene fluoride, polyurethane, polyester, polyamide, polyimide, polyetherimide (PEI), polysulfone, polyethersulfone, polyethylene-polyvinyl alcohol copolymer (EVOH), polylactic acid, cellulose acetate (CA), nylon and glass fiber.

9. The surface treatment process of the hollow fiber membrane according to claim 1 makes it not only have good biocompatibility, but also have excellent selective permeability and mechanical strength, suitable for long-term operation and not easy to be damaged.

10. The integrated landscape lighting and outdoor algae ecological "light tree" bioreactor according to claim 1 is characterized by: A structure is designed at the bottom to facilitate the collection of microalgae biomass products, such as a sedimentation tank or a filter screen, to simplify the harvesting process.

11. The integrated landscape lighting and outdoor algae ecological "light tree" bioreactor according to claim 1 is characterized by: The overall frame adopts a modular design, which supports flexible assembly and expansion according to different application scenarios. It also has a viewing lighting module that emits a soft green light at night, which is visually attractive without causing light pollution.

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