Suspension type composite double-layer culture bag for freshwater microalgae culture

Abstract

The utility model provides a suspension type composite double-layer culture bag for freshwater microalgae culture. A hanging piece is fixedly connected to the top of a composite bag body of the composite double-layer culture bag, a through hole is formed in the hanging piece, a pH value detector inlet pipe is arranged on the side upper portion of the composite bag body, an air inlet connecting pipe is arranged on the side lower portion of the composite bag body, a liquid inlet and outlet pipe is fixedly installed at the bottom of the composite bag body, and external threads are arranged at the end of the liquid inlet and outlet pipe. The liquid inlet and outlet pipe is in threaded connection with the connecting straight pipe through external threads, the electromagnetic valve is installed on the connecting straight pipe, and the other end of the connecting straight pipe is communicated with the main material pipe. According to the culture bag, a plurality of culture bags can be hung on the cross beam at the same time to increase the culture area of fresh water microalgae, mixed gas mixed with carbon dioxide is conveyed into the culture bags to guarantee a carbon source needed by growth of the fresh water microalgae, the pH value of algae liquid in the culture bags is adjusted by adjusting the input amount of the carbon dioxide, and the culture bag is simple and practical in structure and convenient to use. Operation and management are very convenient, slight corrosion can be resisted, and firmness and durability are achieved.

Description

Technical Field

[0001] This utility model relates to the field of microalgae cultivation technology, and in particular to a suspended composite double-layer cultivation bag for freshwater microalgae cultivation. Background Technology

[0002] Microalgae belong to the class Algae, and are a subset of Algae, specifically referring to tiny algal communities that can only be observed under a microscope. Individual microalgae are typically only a few micrometers to hundreds of micrometers in size, lacking the differentiation of typical plant organs such as roots, stems, and leaves, and have relatively simple cellular structures. Microalgae are miniature colonies of algae, possessing both biological characteristics and wide-ranging applications. Microalgae is not a strictly taxonomic term, but rather refers to tiny algal communities visible under a microscope. Common economically important microalgae include Haematococcus pluvialis and Chlorella vulgaris.

[0003] Currently, existing technologies for the artificial cultivation of freshwater microalgae can be divided into: 1. Outdoor cultivation using closed glass pipes. This requires suitable temperatures; for example, Haematococcus pluvialis thrives at around 25 degrees Celsius. In Yunnan, the temperature difference is small throughout the year, and the temperature remains around 25 degrees Celsius for most of the time. Therefore, some areas in Yunnan cultivate Haematococcus pluvialis outdoors using closed glass pipes. Because natural temperatures cannot remain completely constant, water circulation is also used to regulate the temperature in Yunnan. Closed glass pipes can effectively control the environment, but this cultivation method requires a large area and has high equipment and operating costs. 2. Constructing open pools on the ground and adding culture medium to the pools for cultivation. Freshwater microalgae cultivation in pools also requires temperature control. Pools are inexpensive to build, but the environment cannot be controlled, making them susceptible to contamination by bacteria and protozoa, which harm algal growth and result in lower algal yields. 3. Cultivating using transparent plastic bags, where the algal solution is transported into the transparent plastic bags for cultivation. This method has low equipment costs and can effectively control the cultivation environment, but the bags are independent and only suitable for small-scale cultivation, generally applicable to cultivating algal strains. Therefore, the growth of freshwater microalgae requires comprehensive consideration of factors such as light, temperature, nutrients, pH, and culture system. Different species and environments require targeted optimization of conditions.

[0004] In summary, the technicians of this application have designed a suspended composite double-layer culture bag for freshwater microalgae cultivation. Summary of the Invention

[0005] The purpose of this invention is to provide a suspended composite double-layer culture bag for freshwater microalgae cultivation. The technical problem this invention aims to solve is: using a suspended composite double-layer culture bag to cultivate freshwater microalgae allows multiple culture bags to be suspended on a crossbeam, with unified feeding and discharging via a main feed pipe. Simultaneously, it enables real-time control of temperature and pH within the culture zone indoors, thus solving the technical problems of freshwater microalgae cultivation.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows:

[0007] A suspended composite double-layer aquaculture bag for freshwater microalgae cultivation includes: a composite bag body, a hanger, a pH meter inlet pipe, an air inlet pipe, a main feed pipe, a connecting straight pipe, a solenoid valve, a liquid inlet / outlet pipe, and a through hole. The composite double-layer aquaculture bag has a hanger fixed to the top of the composite bag body, and the hanger has a through hole. A pH meter inlet pipe is located on the upper side of the composite bag body, with its end communicating with the inner space of the composite bag body. An air inlet pipe is located on the lower side of the composite bag body, with its end communicating with the inner space of the composite bag body. A liquid inlet / outlet pipe is fixed to the bottom of the composite bag body, with an external thread at its end. The liquid inlet / outlet pipe is threaded to the connecting straight pipe via the external thread. A solenoid valve is installed on the connecting straight pipe, and the other end of the connecting straight pipe is connected to the main feed pipe.

[0008] The composite double-layer aquaculture bag has a double-layer structure, with an inner lining made of polyethylene (PE) and an outer layer made of polyethylene terephthalate (PET). The composite bag is formed by pressing and melting the edges of the inner lining and the outer layer.

[0009] Compared with the prior art, the positive effects of this utility model are as follows:

[0010] 1. The culture bag is suspended on the beam through the through holes on the hook, so that multiple culture bags can be suspended on the beam at the same time to increase the culture area of ​​freshwater microalgae.

[0011] 2. The culture bag is connected to an air inlet pipe via an air inlet connector, through which a mixed gas containing carbon dioxide is delivered into the culture bag to ensure the carbon source required for the growth of freshwater microalgae.

[0012] 3. The culture bag is connected to a pH meter via an inlet pipe. The pH meter is inserted into the culture bag to monitor the pH value of the liquid inside the bag in real time, or the pH value of the algal solution inside the culture bag can be adjusted by adjusting the amount of carbon dioxide input.

[0013] 4. The aquaculture bag uses liquid inlet and outlet pipes connected to a connecting straight pipe via threads, and feeds or discharges the material uniformly through the main material pipe, which is controlled by a solenoid valve;

[0014] 5. The breeding bag has a simple and practical structure, making it extremely convenient to operate and manage. In addition, due to its double-layer composite structure, the breeding bag can resist slight corrosion and is sturdy and durable. Attached Figure Description

[0015] To more clearly illustrate the technology of this utility model in its embodiments, the accompanying drawings are briefly introduced below. The drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without any creative effort.

[0016] The accompanying drawings, including their structure, proportions, and sizes, are only intended to complement the content disclosed in this specification and to enable those skilled in the art to understand and read them. They are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in proportions, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0017] Figure 1 A schematic diagram of the structure of a suspended composite double-layer aquaculture bag;

[0018] Figure 2 A schematic diagram of the connection of a suspended composite double-layer aquaculture bag.

[0019] In the diagram: 1. Composite bag body, 2. Hanging piece, 3. pH meter inlet pipe, 4. Air inlet pipe, 5. Air inlet pipe, 6. Main material pipe, 7. Connecting straight pipe, 8. Solenoid valve, 9. Liquid inlet / outlet pipe, 10. Through hole. Detailed Implementation

[0020] The technical solution of this utility model will be further described clearly and completely below with reference to the accompanying drawings. The specific embodiments described below are only used to further illustrate this application and should not be construed as limiting the scope of protection of this application. Those skilled in the art can make some non-essential improvements and adjustments to this application based on the above application content.

[0021] See appendix Figure 1-2 The installation and connection of the suspended composite double-layer aquaculture bag involves fixing the hanger 2 to the top of the composite bag body 1. A through hole 10 is located at the top of the hanger 2. The pH meter inlet pipe 3 is located on the upper side of the composite bag body 1, with its end communicating with the inner space of the composite bag body 1. The air inlet pipe 4 is located on the lower side of the composite bag body 1, with its end communicating with the inner space of the composite bag body 1. The liquid inlet / outlet pipe 9 is fixed to the bottom of the composite bag body 1, with an external thread at its end, and is threaded to the connecting straight pipe 7. A solenoid valve 8 is installed on the connecting straight pipe 7, with the other end of the connecting straight pipe 7 connected to the main feed pipe 6.

[0022] The composite bag body 1 in the composite double-layer aquaculture bag has a double-layer structure. Its inner lining is made of polyethylene (PE) material, and its outer layer is made of polyethylene terephthalate (PET) material. The composite bag body 1 is formed by edge pressing and melting of the inner lining and the outer layer.

[0023] In use, the composite bag 1 is suspended from the crossbeam through the through hole 10 on the hanger 2. The air inlet pipe 5 is sealed to the air inlet connector 4. The pH meter extends into the composite bag 1 through the pH meter inlet pipe 3. The liquid inlet / outlet pipe 9 at the bottom of the composite bag 1 is threaded to the connecting straight pipe 7 via external threads. The other end of the connecting straight pipe 7 is connected to the main feed pipe 6. After the connection is completed, the operator opens the solenoid valve 8, and the algae solution and nutrient solution are transported into the composite bag 1 from the main feed pipe 6 through the connecting straight pipe 7. When the algae solution and nutrient solution in the composite bag 1 meet the process requirements, the operator closes the solenoid valve 8 to stop the liquid transport. The pH value in the composite bag 1 is monitored in real time by the pH meter. A mixture of air and carbon dioxide is transported into the composite bag 1 through the air inlet pipe 5 to ensure the carbon source required for the growth of freshwater microalgae. Nutrient solution can be further transported into the composite bag 1 through the main feed pipe 6 and the connecting straight pipe 7.

[0024] When the microalgae in composite bag 1 need to be separated into smaller bags or transported to a culture pond for further cultivation, the operator opens solenoid valve 8. The algal solution and nutrient solution in composite bag 1 are then transported to the desired process or culture pond via main feed pipe 6 and connecting straight pipe 7. Composite bag 1 can then be used for the cultivation of the next batch of freshwater microalgae, and the operation process is the same as described above.

[0025] The above description is only a non-limiting embodiment of the present utility model, and a large number of embodiments can be derived. For those skilled in the art, without departing from the inventive concept of the present utility model and without making creative efforts, several modified and improved embodiments can be made, all of which fall within the protection scope of the present utility model.

Claims

1. A suspended composite double-layer culture bag for freshwater microalgae cultivation, comprising: The composite double-layer aquaculture bag comprises a composite bag body (1), a hanging piece (2), a pH meter inlet pipe (3), an air inlet pipe (4), a main material pipe (6), a connecting straight pipe (7), a solenoid valve (8), a liquid inlet / outlet pipe (9), and a through hole (10). The bag is characterized by having a hanging piece (2) fixed to the top of the composite bag body (1), a through hole (10) on the hanging piece (2), and a pH meter inlet pipe (3) on the upper side of the composite bag body (1). The composite bag body (1) is connected to the inner space of the composite bag body (1). An air inlet pipe (4) is provided on the lower side of the composite bag body (1). The end of the air inlet pipe (4) is connected to the inner space of the composite bag body (1). A liquid inlet pipe (9) is fixedly installed at the bottom of the composite bag body (1). The end of the liquid inlet pipe (9) is provided with an external thread. The liquid inlet pipe (9) is threaded to the connecting straight pipe (7) through the external thread. A solenoid valve (8) is installed on the connecting straight pipe (7). The other end of the connecting straight pipe (7) is connected to the main material pipe (6).

2. The suspended composite double-layer culture bag for freshwater microalgae cultivation according to claim 1, characterized in that: The composite bag body (1) in the composite double-layer aquaculture bag has a double-layer structure. Its inner lining is made of polyethylene material and its outer layer is made of polyethylene terephthalate material. The composite bag body (1) is formed by edge pressing and melting of the inner lining and the outer layer.

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