Microalgae membrane separation and harvesting device

Abstract

The utility model discloses a microalgae membrane separation and harvesting device, which belongs to the technical field of microbial culture and comprises a liquid storage barrel and a filter channel formed by splicing and combining a plurality of split structures and used for harvesting microalgae, the filtering channel comprises a plurality of split cylinders which are detachably connected, and a plurality of layers of filtering membranes of which the pore diameters are gradually reduced are sequentially arranged in each split cylinder from top to bottom. Microalgae cells are cultured through a columnar photobioreactor, the algae cells are separated through membrane filtration, algae liquid is discharged from the bottom of a cone at the lower end of a column, supernate is discharged in a filtration mode, the algae cells are attached to the membrane, the discharged supernate can continue to culture the algae cells, microalgae mud on the multilayer harvesting membrane is scraped off through filtration, and the microalgae cells are collected through the membrane. The microalgae mud is obtained; therefore, the harvesting cost of large-scale cultured microalgae is reduced, the harvesting time is shortened, and the harvesting efficiency is improved; the cyclic utilization of the culture solution greatly reduces the treatment capacity, and the microalgae culture and harvesting process is simple and convenient to operate.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of microorganism culture, especially to a microalgae membrane separation and recovery device. BACKGROUND

[0002] Chlorella vulgaris, a microalgae species, is a small but powerful organism. As one of the representatives of microalgae, Chlorella vulgaris has wide applications in ecology, medicine, and industry. This article will introduce the classification, functions, and uses of Chlorella vulgaris.

[0003] Chlorella vulgaris is a single-celled microalgae. It usually exists in a spherical cell form, hence the name "Chlorella". In taxonomy, Chlorella vulgaris is classified as Chlorophyceae and belongs to the genus Chlorella.

[0004] Chlorella vulgaris has a wide range of functions. Chlorella vulgaris is one of the main executors of photosynthesis, capable of synthesizing organic matter using sunlight and carbon dioxide, releasing oxygen, and maintaining water ecological balance. Chlorella vulgaris has strong adsorption and decomposition ability for organic waste and pollutants in the environment, and can be used for water purification, soil remediation, and other environmental protection work. Chlorella vulgaris is rich in nutrients such as protein, vitamins, and minerals, and is a high-quality nutritional supplement that helps improve human health. Chlorella vulgaris can convert carbon dioxide into organic matter using light energy, and can be used as an important source of bioenergy, such as biodiesel and bioethanol. Chlorella vulgaris contains a wealth of bioactive substances with antioxidant, anti-inflammatory, and anti-tumor effects, and is used in drug development and health product manufacturing.

[0005] Due to its rich functions, Chlorella vulgaris is widely used in various fields. For example, Chlorella vulgaris can be used as a food additive to make nutritional beverages, nutritional powders, and functional foods to meet people's demand for healthy diets. Chlorella vulgaris can be used as a raw material for biomass energy to produce clean energy such as biodiesel and bioethanol, helping to reduce dependence on fossil fuels. Chlorella vulgaris has good environmental adaptability and bioremediation ability, and can be used for water purification, wastewater treatment, soil remediation, and other environmental protection work. Bioactive substances in Chlorella vulgaris are beneficial to human health and are used in pharmaceuticals and health products. Chlorella vulgaris is widely used as a model organism in biological, ecological, and bioengineering research fields, providing an important tool for humans to understand the mysteries of life.

[0006] Chlorella plays an important role in the ecosystem. As one of the main executors of photosynthesis, Chlorella releases oxygen through photosynthesis, providing oxygen for the survival of organisms in the water body and maintaining the ecological balance of the water body. Chlorella can use carbon dioxide for photosynthesis, converting it into organic matter, reducing the concentration of carbon dioxide in the atmosphere, and helping to alleviate the greenhouse effect. As part of the microbial community, Chlorella participates in the construction of the water food chain, providing a foundation for the stable operation of the aquatic ecosystem. Chlorella has the ability to adsorb and decompose organic waste, which can help purify water, improve water quality, and maintain the health of the ecological environment. Sustainable utilization of Chlorella To achieve sustainable utilization of Chlorella resources, large-scale cultivation of Chlorella is carried out, and the yield and quality of Chlorella are improved by optimizing the cultivation conditions and management measures. Continuous research on Chlorella is carried out to promote technological innovation and improve the processing and utilization efficiency and added value of Chlorella. Strengthen the protection and management of water environment, reduce the adverse effects of water pollution on the growth of Chlorella, and protect the survival environment of Chlorella. The government and enterprises increase support for the Chlorella industry, encourage the development and promotion of Chlorella-related products, and promote the healthy development of the Chlorella industry.

[0007] Through continuous scientific research and industrial development, it is believed that this small but powerful organism will show more ecological miracles and inject new vitality and hope into the sustainable development of human society. Chlorella, although small, plays a huge role in the ecosystem, medicine and industry. Through the introduction of its classification, function and use, with the improvement of people's awareness of health and environmental protection, the Chlorella industry has broad development prospects. In the future, Chlorella will be more widely used in food, energy, medicine and environmental protection, and will make greater contributions to human health and environmental sustainable development.

[0008] Microalgae harvesting technology and method has been one of the key bottlenecks in the development of microalgae industry. Effective microalgae harvesting technology can not only improve the microalgae harvesting rate, but also reduce the production cost and promote the healthy development of microalgae industry. Common microalgae harvesting technology and method include membrane separation method, sedimentation method, centrifugation method, flotation method, electro-deposition method, biological flocculation method, ultrasonic method, etc. Among them, the centrifugation method, biological flocculation method and other methods have high cost, and the membrane separation method is time-consuming, which makes the harvesting efficiency low. Practical new type content

[0009] The purpose of the utility model is to provide a kind of microalgae membrane separation harvesting device, solve the problem that conventional microalgae membrane separation harvesting device is time-consuming in separation, and the efficiency of harvesting is low.

[0010] To solve the above technical problems, the utility model adopts the following technical solutions:

[0011] The utility model provides a kind of microalgae membrane separation and recovery device, including liquid storage barrel, the filter channel of multiple split structure splicing combination for recovering microalgae;

[0012] Wherein the bottom of the liquid storage barrel is provided with a first drain pipe connected with the filter channel inlet pipe, and a valve is installed on the first drain pipe;

[0013] The filter channel includes a plurality of detachable split cylinders, and a plurality of layers of filter membranes with gradually decreasing pore sizes are sequentially arranged from top to bottom in each split cylinder.

[0014] Further, the filter channel sequentially includes an upper connecting cover, a first split cylinder, a second split cylinder, a third split cylinder, a fourth split cylinder, and a lower connecting cover, which are detachably spliced with each other from top to bottom.

[0015] Wherein the first split cylinder, the second split cylinder, the third split cylinder, and the fourth split cylinder are respectively provided with a first support net, a second support net, a third support net, and a fourth support net.

[0016] The first filter membrane is laid on the first support net, the second filter membrane is laid on the second support net, the third filter membrane is laid on the third support net, and the fourth filter membrane is laid on the fourth support net.

[0017] Further, the upper connecting cover and the lower connecting cover are respectively in the shape of a conical funnel.

[0018] The upper connecting cover is provided with an upper connecting pipe connected with the first drain pipe.

[0019] The bottom of the lower connecting cover is provided with a lower connecting pipe connected with the second drain pipe.

[0020] Further, the distance between adjacent filter membranes is 30-100 mm, preferably 50-80 mm.

[0021] Further, the upper connecting cover, the first split cylinder, the second split cylinder, the third split cylinder, the fourth split cylinder, and the lower connecting cover are connected with each other through thread cooperation.

[0022] Further, the pore size of the filter membrane is 1-8 μm; the pore size of the first filter membrane is 6-8 μm, the pore size of the second filter membrane is 4-6 μm, the pore size of the third filter membrane is 3-4 μm, and the pore size of the fourth filter membrane is 1-2 μm.

[0023] Compared with the prior art, the utility model has the following beneficial technical effects:

[0024] The application cultivates microalgae cells through a columnar photobioreactor, separates the algae cells by membrane filtration, discharges the algae liquid from the bottom of the columnar end cone, discharges the supernatant through a filter, and the algae cells are attached to the membrane, the discharged supernatant can continue to cultivate the algae cells, the microalgae mud on the multi-layer harvesting membrane is scraped off through filtration, and the microalgae mud is obtained; thus, the harvesting cost of large-scale cultivation of microalgae is reduced, the harvesting time is shortened, and the harvesting efficiency is improved; the recycling of the culture solution greatly reduces the treatment amount; the microalgae cultivation and harvesting process is simple and convenient to operate.

[0025] The harvesting device in the application has high harvesting efficiency of microalgae; the four-layer membrane filtration structure can conveniently and efficiently harvest the algae cells; the problems of large energy consumption and complicated operation in the harvesting of microalgae are solved; the method is simple and efficient. BRIEF DESCRIPTION OF DRAWINGS

[0026] The application will be further described below in combination with the drawings.

[0027] Figure 1 Fig. 1 is a structural schematic view of the microalgae membrane separation and harvesting device of the application;

[0028] Figure 2 Fig. 2 is a schematic view of the split body of the microalgae membrane separation and harvesting device of the application;

[0029] Figure 3 Fig. 3 is a schematic view of the split body of the microalgae membrane separation and harvesting device of the application when the split body is inclined;

[0030] Figure 4 Fig. 4 is an enlarged schematic view of the threaded connection structure between the split body cylinders.

[0031] Fig. 1 is a structural schematic view of the microalgae membrane separation and harvesting device of the application; DETAILED DESCRIPTION

[0032] As shown in Fig. 1, the application discloses a microalgae membrane separation and harvesting device, which comprises a liquid storage barrel 1 and a plurality of split structure spliced and combined filter channels for harvesting microalgae. Figures 1-4

[0033] Among them, a first drainage pipe 21 connected with the filter channel liquid inlet pipe is installed at the bottom of the liquid storage barrel 1, and a valve 3 is installed on the first drainage pipe 21. ​

[0034] The filter channel comprises a plurality of detachably connected sub-cylinders, and a plurality of layers of filter membranes with gradually reduced pore diameters are sequentially arranged in each sub-cylinder from top to bottom.

[0035] In this embodiment, as shown in the figure, the filter channel sequentially comprises an upper connecting cover 4, a first sub-cylinder 5, a second sub-cylinder 6, a third sub-cylinder 7, a fourth sub-cylinder 8 and a lower connecting cover 9 which are detachably spliced with each other from top to bottom. Figures 1-3

[0036] The first support net 51, the second support net 61, the third support net 71 and the fourth support net 81 are respectively arranged in the first sub-cylinder 5, the second sub-cylinder 6, the third sub-cylinder 7 and the fourth sub-cylinder 8 for supporting the filter membranes.

[0037] The first filter membrane 52 is arranged on the first support net 51, the second filter membrane 62 is arranged on the second support net 61, the third filter membrane 72 is arranged on the third support net 71 and the fourth filter membrane 82 is arranged on the fourth support net 81, so that different filter membranes can be easily detached for scraping corresponding microalgae.

[0038] In this embodiment, as shown in the figure, the upper connecting cover 4, the first sub-cylinder 5, the second sub-cylinder 6, the third sub-cylinder 7, the fourth sub-cylinder 8 and the lower connecting cover 9 are connected by thread cooperation between every two adjacent ones. Figure 4

[0039] In order to ensure the positioning of each layer of filter membranes, the positions of the support nets can be respectively designed to contact the bottom of the inner thread sleeve of the upper layer sub-cylinder 5, so that the edges of each layer of filter membranes can be pressed by the inner thread sleeve and the support nets.

[0040] In this embodiment, the upper connecting cover 4 and the lower connecting cover 9 are respectively in the shape of a conical funnel, so that the liquid to be filtered can pass through uniformly.

[0041] The upper connecting cover 4 is provided with an upper connecting pipe 41 connected with the first liquid discharge pipe 21, and the bottom of the lower connecting cover 9 is provided with a lower connecting pipe 91 connected with the second liquid discharge pipe 22.

[0042] In specific implementation, the distance between adjacent filter membranes is 30-100 mm, preferably 50-80 mm.

[0043] In this embodiment, the pore diameter of the filter membrane is 1-8 μm, the pore diameter of the first filter membrane 52 is 6-8 μm, the pore diameter of the second filter membrane 62 is 4-6 μm, the pore diameter of the third filter membrane 72 is 3-4 μm and the pore diameter of the fourth filter membrane 82 is 1-2 μm. ​​

[0044] In this embodiment, the screening is performed by means of gravity self-falling;

[0045] The application conditions include:

[0046] The microalgae cell density to be harvested is 0D680≤2.50, preferably 1.50-2.00; the pH value is ≤8.20, preferably 7.50-8.00; the temperature is ≤30℃, preferably 25-28℃; and the supernatant after cell separation is 0D680≤0.10.

[0047] The working principle of this embodiment is as follows:

[0048] The microalgae cells are cultured by means of a columnar photobioreactor, the algal liquid is discharged from the bottom of the columnar bottom cone, the supernatant is discharged by filtration, the algal cells are attached to the biological membrane, the discharged supernatant can continue to culture the algal cells, the microalgae mud on the harvesting membrane is scraped off by the filter screen, and the microalgae mud is obtained.

[0049] The embodiment also provides a method for harvesting microalgae, which comprises the following steps: discharging the microalgae liquid to be harvested from the bottom of the columnar bottom cone, the flow rate can be adjusted according to the size of the membrane, the membrane-mounted equipment is connected with the pipeline, the membrane-mounted equipment is preferably made of PVC and PPE materials, the membrane-mounted equipment is easy to mount and dismount, when the valve is opened, the algal liquid is left at the bottom of the columnar bottom cone, enters the first filter membrane 52, then enters the second filter membrane 62, then enters the third filter membrane 72, and finally enters the fourth filter membrane 82, and the supernatant is discharged, wherein the algal liquid is attached to the membrane. After the algal liquid in the columnar bottom cone is completely discharged, the filter membrane equipment is unscrewed, the algal cells attached to the membrane are scraped off, and the membrane is cleaned for the next use.

[0050] The discharged supernatant can continue to culture the algal cells, the supernatant is discharged, the algal cells are attached to the biological membrane, the discharged supernatant can continue to culture the algal cells, the microalgae mud on the harvesting membrane is scraped off by the filter screen, and the microalgae mud is obtained.

[0051] The above embodiment only describes the preferred mode of the present application, and does not limit the scope of the present application. Without departing from the design spirit of the present application, various modifications and improvements of the technical solution of the present application made by those skilled in the art shall fall within the protection scope determined by the claims of the present application.

Claims

1. A microalgae membrane separation harvesting device, characterized by: The application relates to a microalgae collecting device, which comprises a liquid storage barrel (1) and a plurality of filter channels formed by splicing and combining of multiple split structures for collecting microalgae. A first liquid discharge pipe (21) is arranged at the bottom of the liquid storage barrel (1) and connected with the liquid inlet pipe of the filter channel, and a valve (3) is arranged on the first liquid discharge pipe (21). The filter channel comprises a plurality of detachably connected split cylinders, and a plurality of layers of filter membranes with gradually reduced pore diameters are arranged in each split cylinder from top to bottom.

2. The microalgae film separation harvesting device of claim 1, wherein: The filter channel comprises an upper connecting cover (4), a first split cylinder (5), a second split cylinder (6), a third split cylinder (7), a fourth split cylinder (8) and a lower connecting cover (9) which are detachably spliced one after another from top to bottom. The first split cylinder (5), the second split cylinder (6), the third split cylinder (7) and the fourth split cylinder (8) are respectively provided with a first supporting net (51), a second supporting net (61), a third supporting net (71) and a fourth supporting net (81). The first supporting net (51) is provided with a first filter membrane (52), the second supporting net (61) is provided with a second filter membrane (62), the third supporting net (71) is provided with a third filter membrane (72) and the fourth supporting net (81) is provided with a fourth filter membrane (82). The upper connecting cover (4) and the lower connecting cover (9) are respectively in the shape of a conical funnel.

3. The microalgae film separation harvesting device of claim 2, wherein: An upper connecting pipe (41) is arranged on the upper connecting cover (4) and connected with the first liquid discharge pipe (21). A lower connecting pipe (91) is arranged at the bottom of the lower connecting cover (9) and connected with a second liquid discharge pipe (22). The distance between adjacent filter membranes is 30-100 mm.

4. The microalgae film separation harvesting device of claim 1, wherein: The upper connecting cover (4), the first split cylinder (5), the second split cylinder (6), the third split cylinder (7), the fourth split cylinder (8) and the lower connecting cover (9) are connected with each other through thread cooperation.

5. The microalgae film separation harvesting device of claim 2, wherein: The filter pore diameter of the first filter membrane (52) is 6-8 mu m, the filter pore diameter of the second filter membrane (62) is 4-6 mu m, the filter pore diameter of the third filter membrane (72) is 3-4 mu m and the filter pore diameter of the fourth filter membrane (82) is 1-2 mu m.

6. The microalgae film separation harvesting device of claim 2, wherein: ​

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