A controllable gas generating device for inducing black soldier flies to lay eggs and an egg-inducing method

Abstract

The present invention discloses a controllable gas generating device and egg inducing method for inducing black soldier flies to lay eggs, and belongs to the field of environmental protection / kitchen waste treatment technology. The device of the present invention comprises a tank body, a partition, an attracting box and a micro fan. A circulating water inlet, a water inlet, a feed inlet and a gas suction outlet are provided on the top of the tank body. The circulating water inlet is connected to the water suction port below the tank body through a circulating water pipe, and the water inlet is connected to the circulating water pipe and / or an external water supply device. The gas suction outlet is connected to the attracting box through a negative pressure air duct, and a micro fan and a flow valve are provided on the negative pressure air duct; a hollow partition is provided inside the tank body to place fermentation materials, and a feed extraction port is provided at the lowest point of the partition, and an isolation net is installed on the attracting box. The use of the device of the present invention to induce eggs can reduce unnecessary gas waste and overflow pollution, avoid the waste of rapid corruption and insects of fermentation materials, prolong the time of egg-inducing gas generation, and enhance the attracting effect.

Description

Technical Field

[0001] The present invention belongs to the technical field of environmental protection / kitchen waste treatment, and more specifically, relates to a controllable gas generating device for inducing black soldier flies to lay eggs and an egg-inducing method. Background Art

[0002] The black soldier fly is a saprophytic insect whose larvae feed on organic waste, transforming it into insect protein and manure as organic fertilizer. This is now widely used in the resource recovery of various organic wastes.

[0003] Throughout the entire black soldier fly cultivation process, egg quantity and quality are crucial to ensuring the industry's success. Adult black soldier flies require specific attractant gas sources, as well as lighting, temperature, and humidity. Currently, these lighting, temperature, and humidity can be automatically controlled to ensure stable conditions. However, the attractant gas source is currently limited to basins of material within the adult fly breeding area, where the natural decay of organic material within the basins generates the egg-attracting gas.

[0004] However, this method produces inconsistent odor. When gas volume is at its peak, a non-enclosed system can easily pollute the surrounding air. A fully enclosed system can lead to increasingly high gas concentrations within the chamber, making it difficult for adult black soldier flies to locate and lay eggs, while also creating health risks for workers entering the breeding room. During periods of low gas volume, it's difficult to attract a sufficient number of eggs. The entire fermentation process is short-lived and prone to insect infestation, causing the fermented material to quickly lose its effectiveness and become waste.

[0005] A search revealed patents related to devices for attracting black soldier flies to lay eggs. For example, Chinese patent application number 202220624252.1, filed on March 21, 2022, discloses a device for attracting black soldier flies to lay eggs. The device comprises a storage box, a screen, straps, an adjustment rack, and a crossbar. The storage box is fitted with a screen, which is then fitted with straps. Adjustment racks are located on either side of the box, with at least two crossbars located between the racks, extending above the storage box. This patent utilizes adjustment racks to mount the crossbars, and lays an egg-laying plate on the crossbars, making it easy to disassemble and clean. This addresses the issue of the device's tendency to slide and accumulate. However, the device suffers from difficulties in achieving controllable regulation of the egg-attracting gas. Unavoidable issues exist, such as unstable gas production, which affects the egg-laying process and efficiency of black soldier flies, making it difficult to achieve automated and efficient egg-laying. Summary of the Invention

[0006] 1. Problem to be solved

[0007] The present invention addresses the deficiencies recorded in the above-mentioned background technology existing in the natural fermentation of traditional potted materials. In order to reduce unnecessary gas waste and overflow pollution, reduce the waste of rapid corruption and insect infestation of internal materials, prolong the time of egg-attracting gas generation, and enhance the luring effect, a controllable gas generating device and egg-attracting method for inducing black soldier flies to lay eggs are provided to solve the above-mentioned problems.

[0008] 2. Technical solution;

[0009] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0010] The controllable gas generating device for attracting black soldier flies to lay eggs comprises a tank, a partition, an attractant box, and a miniature fan. The tank serves as a fermentation container for containing fermented material, generating egg-attracting gas to attract adult black soldier flies to lay eggs. A circulating water inlet, a water inlet, a feed inlet, and a gas suction port are provided at the top of the tank. The circulating water inlet is connected to a water pump located below the tank via a circulating water pipe. The water inlet is connected to a circulating water pipe and / or an external water supply. During the initial fermentation phase, external water is used to replenish the fermented material. During subsequent fermentation, the circulating water inlet and the water pump allow permeate water from the bottom of the tank to be pumped upward for spraying and recycling.

[0011] The gas suction port is connected to the attractant box through a negative pressure air duct, and the negative pressure air duct is provided with a micro fan and a flow valve. By setting the micro fan, the egg-inducing gas in the tank can be drawn into the attractant box to induce black soldier flies to lay eggs. In addition, the flow valve is set to facilitate the adjustment of the gas output of the inducing gas, and the device can be closed by closing the valve to save fermentation materials.

[0012] The tank body is fixed with a hollow partition, on which fermentation material is laid, and a material extraction port is provided at the lowest point of the partition. When changing the material, the fermentation material can be easily extracted through the material extraction port for replacement. The attractant box is installed with an isolation net for placing black soldier flies to lay eggs.

[0013] As a further improvement of the present invention, the device further includes a water pump and a pressure boosting port. The water pump is installed on a pipe at the water inlet of the tank body to facilitate extraction of the permeate water from the tank body. The pressure boosting port is located on the side wall of the tank body and is equipped with a micro air pump to facilitate maintaining and regulating the pressure in the tank body.

[0014] As a further improvement of the present invention, the device of the present invention also includes a rotor flowmeter, which is arranged between the flow valve and the attractant box, and is used to detect the flow of the attractant gas, and control the opening of the flow valve according to the detection result to adjust the output volume of the induced gas to meet the egg induction demand.

[0015] As a further improvement of the present invention, the device of the present invention also includes a spray head, which is arranged directly above the partition and is connected to the water inlet. Using the spray head for spraying helps to improve the uniformity of spraying and ensure uniform wetting of the fermentation material.

[0016] As a further improvement of the present invention, the partition is set at 10 to 20 cm away from the bottom of the tank body. The partition is processed into an inverted cone structure as a whole, and a 25 to 30 mesh stainless steel or nylon barrier net is laid on the surface of the partition in contact with the fermentation material. By designing the aperture size of the barrier net, it can ensure the soaking effect of the fermentation material and also help reduce the loss of the fermentation material.

[0017] As a further improvement of the present invention, the isolation net of the attractant box is made of 300-400 mesh stainless steel or nylon.

[0018] The method for inducing black soldier flies to lay eggs of the present invention adopts the above-mentioned device to induce eggs, comprising the following steps:

[0019] Step 1, feeding;

[0020] The fermentation material is fed into the partition from the feed port, the fermentation material is laid to a thickness of ≥30cm, and water is added to the fermentation material until the overall moisture content is 53-55%, and the fermentation material is allowed to stand to produce egg-attracting gas;

[0021] Step 2: Pumping air to induce eggs;

[0022] Increase the pressure in the tank through the boost port to maintain the pressure in the tank at 1.2±0.02 standard atmospheric pressure, turn on the micro fan, and adjust the flow valve to adjust the gas output of the egg-luring gas to meet the needs of different luring areas;

[0023] Step 3: Turn off the device;

[0024] After the egg induction is completed or when it is not suitable for black soldier flies to lay eggs, directly close the flow valve;

[0025] Step 4: Change materials;

[0026] By spraying water into the tank body to humidify the fermentation material, the fermentation material is then extracted from the extraction port by the extraction equipment, and water is continued to be sprayed into the tank to clean the entire tank cavity.

[0027] As a further improvement of the present invention, the preparation method of the fermentation material is as follows: using soybean meal as raw material, adding 0.3-0.5% of the mass of soybean meal equivalent to Bacillus subtilis liquid, 0.3-0.5% of Bacillus licheniformis liquid and 0.5-1% of saprophytic Staphylococcus liquid, adjusting the moisture content to 45-48%, and pre-fermenting for 2 days in a sealed container at room temperature to obtain. The reinforced material fermented by the composite microbial combination is used to attract black soldier flies to lay eggs, which helps to improve the egg-laying amount and egg-laying quality of black soldier flies. In step 2, in order to ensure that the egg-attracting gas concentration has the best egg-attracting effect, the gas output of the egg-attracting gas should be controlled to meet the following requirements:

[0028] As a further improvement of the present invention, the ratio of the gas output to the mass of the soybean meal in the initial fermentation material is ≤2.2, and the ratio of the gas output to the total area of ​​the isolation net on the attractant box is 135-150, wherein the unit of the gas output is L / h, the unit of the mass of the soybean meal is kg, and the unit of the isolation net area is m 2 .

[0029] As a further improvement of the present invention, in step 2, during the period of vacuuming and egg induction, water is sprayed on the fermentation material every 2-3 days to replenish water until water seeps out of the fermentation material. The seeped water is pumped out through the pumping port to the circulating water inlet for recycling.

[0030] Compared with the prior art, the present invention has the following beneficial effects:

[0031] The present invention provides a controllable gas generating device for attracting black soldier flies to lay eggs. By optimizing the overall structure of the device, it is equipped with an automatic material inlet and outlet, a percolation water circulation spraying structure, and a gas release system with ventilation, piping, and gas volume control. This allows for convenient control of the attracting gas, making the process of attracting black soldier flies to lay eggs a fully controllable, automated process that can be integrated into large-scale industries. The entire device has a simple structure and can achieve fully automated, unmanned production, making it suitable for industrial supporting promotion and application. Using the device of the present invention to attract black soldier flies to lay eggs can significantly increase the amount and quality of eggs laid, and has high economic value. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic structural diagram of a controllable gas generating device for attracting black soldier flies to lay eggs according to the present invention;

[0033] Figure 2 This is a flow chart for the production of the fermentation material of the present invention;

[0034] Figure 3 The following is a statistical line graph showing the daily egg production of 14 kg pupae using two egg-inducing methods (the method of the present invention and the traditional method);

[0035] Figure 4It is a statistical line graph of the egg collection amount using the present invention and the traditional egg induction method under the continuous production mode.

[0036] In the picture:

[0037] 1. Tank body; 2. Partition; 3. Feed port; 4. Sprinkler head; 5. Water pump; 6. Circulating water pipe; 7. Extraction port; 8. Booster port; 9. Micro fan; 10. Negative pressure air duct; 11. Flow valve; 12. Rotor flowmeter; 13. Attractant box; 14. Isolation net. DETAILED DESCRIPTION

[0038] In the description of the present invention, the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0039] At the same time, in the description of the present invention, unless otherwise clearly stipulated and limited, the terms "install", "set", "connect", "fix", "screw" and so on should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0040] Furthermore, it should be understood that for the sake of ease of description, the sizes of the various components shown in the drawings are not drawn according to actual proportions. For example, the thickness or width of certain layers may be exaggerated relative to other layers.

[0041] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0042] Example 1

[0043] like Figure 1As shown, a controllable gas generating device for attracting black soldier flies to lay eggs in this embodiment includes a tank body 1, a partition 2, an attractant box 13 and a micro fan 9. The tank body 1 serves as a fermentation container and is the main structure of the device of the present invention. A circulating water inlet, a water inlet and a gas suction port are provided on the top of the tank body 1. A feed port is provided on the upper side wall of the tank body 1 for fermentation materials. The circulating water inlet is connected to a water pump provided below the tank body 1 through a circulating water pipe. The water pump is provided on the side wall near the bottom of the tank body 1. A water pump 5 is installed at the water pump to facilitate the extraction of osmotic water. The water inlet is connected to the circulating water pipe and / or external water supply equipment, thereby realizing the extraction and discharge of osmotic water in the tank body, as well as its recycling and reuse.

[0044] When the fermentation material is first added, the water inlet can be connected to an external water supply device to spray water into the fermentation material in the tank body 1 to maintain the humidity of the fermentation material. When a certain amount of permeate water accumulates at the bottom of the tank body 1, the permeate water can be pumped into the circulating water pipe and sprayed back into the tank body 1 for recycling, reducing the generation of sewage.

[0045] More optimized, such as Figure 1 As shown, a spray head 4 is installed at the water inlet and inside the tank body 1. The spray head 4 is arranged just above the partition 2 and is connected to the water inlet.

[0046] The gas suction port is connected to the attractant box 13 via a negative pressure air duct 10. Specifically, a micro fan 9 is installed at the gas suction port to extract the attractant gas from the tank 1. At the same time, more optimally, a flow valve 11 and a rotor flow meter 12 are provided on the negative pressure air duct 10. The rotor flow meter 12 is provided between the flow valve 11 and the attractant box 13. The rotor flow meter 12 is provided near the air inlet of the attractant box 13 to detect the flow of the attractant gas entering the attractant box 13. By setting the rotor flow meter 12 and the flow valve 11, the flow rate of the attractant gas can be adjusted to meet the usage requirements in different egg-luring scenarios. At the same time, when it is necessary to stop egg induction, the flow valve 11 can be directly closed, shutting down the entire device. This is easy to operate and simple, and can also save fermented material. Moreover, in the relatively closed space inside the tank body 1, the temperature and humidity inside the tank body 1 can be adjusted to make the fermented material less likely to spoil, thereby reducing the loss of the fermented material and significantly extending the service life of the fermented material. Most importantly, the device can stably and controllably produce the most suitable attractant gas for black soldier flies to lay eggs, thereby significantly improving the egg laying amount, egg laying quality, and egg laying effect of black soldier flies. Furthermore, the flow valve 11 and the rotor flowmeter 12 are connected to an existing automatic controller to form feedback automatic adjustment, which can realize intelligent and automated production of the entire egg induction process.

[0047] like Figure 1As shown, a hollow partition 2 is fixedly installed inside the tank body 1. The partition 2 is set 10 to 20 cm from the bottom of the tank body 1. The partition 2 is processed into an inverted cone structure as a whole. The surface of the partition 2 that contacts the fermentation material is covered with a 25 to 30 mesh stainless steel or nylon barrier net, and then the fermentation material is laid on the barrier net. A suction port 7 is provided at the lowest point of the partition 2, and a suction pump is installed at the suction port to facilitate the replacement of the fermentation material from the bottom.

[0048] To ensure controlled release of the attractant gas within the tank 1, the device of the present invention features a pressurization port 8 on the lower sidewall of the tank 1. This port is equipped with a micro-air pump. Combined with a negative pressure duct 10 and a micro-fan 9 connected to the gas suction port, the flow rate of the attractant gas within the device can be regulated. A separation net 14 is mounted above the attractant box 13 to house the black soldier flies awaiting egg laying. This separation net 14 is made of 300-400 mesh stainless steel or nylon.

[0049] The present invention also provides a method for inducing black soldier flies to lay eggs, which uses the device of the present invention to induce black soldier flies to lay eggs, and specifically includes the following steps:

[0050] Step 1, feeding;

[0051] The fermentation material is fed into the partition 2 from the feed port, the fermentation material is laid with a thickness of ≥30 cm, and water is added until the overall moisture content of the fermentation material is 53-55%, and the fermentation material is allowed to stand to produce the attractant gas.

[0052] It should be noted that the present invention uses soybean meal as raw material, supplemented by aerobic and anoxic strains of different types of fermentation to control the production of attractant gas that is most likely to attract black soldier flies to lay eggs. The fermented material is placed in the adjustable device of the present invention, and by controlling the humidity and gas output, the local odor of the attractant gas is enhanced, while also helping to prolong the fermentation time to produce the attractant gas. Specifically, Figure 2 As shown, the novel fermentation feed used in the present invention is prepared as follows: 0.3-0.5% of the mass of the soybean meal is added to soybean meal with a Bacillus subtilis solution, 0.3-0.5% of the mass of the soybean meal, and 0.5-1% of the mass of the bacillus licheniformis solution, and a saprophytic Staphylococcus solution. The moisture content is adjusted to 45-48%, and the mixture is pre-fermented in a sealed container at room temperature for 2 days to obtain the fermentation feed. The three bacterial solutions used are all cultured at 37°C for 48 hours.

[0053] Step 2: Pumping air to induce eggs;

[0054] Once the attractant gas is generated, it is pressurized into the tank 1 via a micro-pump at boost port 8. Once the pressure inside the tank 1 is maintained at 1.2 ± 0.02 standard atmospheres, a micro-fan 9 is activated. At this point, the gas output is adjusted via flow valve 11 based on the readings from rotameter 12 to accommodate varying attractant areas. During the vacuuming period, the fermentation medium is sprayed with water every two to three days until moisture seeps through the fermentation medium, which then flows through the pumping port.

[0055] More optimally, in order to ensure that the attractant gas concentration has the best egg-attracting effect, the present invention satisfies the following requirements by controlling the output volume of the attractant gas:

[0056] The ratio of gas output to the mass of soybean meal in the initial fermentation material is ≤2.2, and the ratio of gas output to the total area of ​​the isolation net 14 on the attractant box 13 is 135-150, where the unit of gas output is L / h, the unit of soybean meal mass is kg, and the unit of the area of ​​the isolation net 14 is m 2 , to obtain the best egg-inducing effect.

[0057] Step 3: Turn off the device;

[0058] After the egg induction is completed or when it is not suitable for black soldier flies to lay eggs, the flow valve 11 is directly closed. Specifically, the device is turned on during the day or under the condition of supplementary light, and at night, when the light conditions are not suitable for black soldier flies to lay eggs, or when eggs are not needed, the device is closed to save fermentation material and extend its service life.

[0059] Step 4: Change materials;

[0060] The fermented material is humidified by spraying water into the tank 1. The material is then extracted from the extraction port 7 using a pumping device. Water is then continuously sprayed into the tank 1 to clean the entire interior. The material is changed approximately every 45-50 days in summer, 65-75 days in winter, and 50-65 days in spring and autumn. During this change, the remaining fermented material is moistened and drained through a spray nozzle and then extracted by a pump. This material can also be used as raw material for the production of commercial black soldier flies. The entire process generates no waste or wastewater, and all wastewater is recycled and reused to the greatest extent possible during processing.

[0061] The method of the present invention solves the problems of unstable egg-attracting odor, poor egg-attracting effectiveness, short shelf life of egg-attracting materials, and rotting and insect-infested waste from replacing attractant pots, making them difficult to recycle, during the production of black soldier fly eggs. A scientific egg-attracting gas generator is provided during the production of black soldier fly eggs, making the egg-attracting process a fully controllable, automated, and industrially scalable process.

[0062] The present invention is further described below with reference to specific production operation examples.

[0063] The present method, in contrast to the conventional black soldier fly egg-inducing method (i.e., placing a material basin in the adult breeding area and placing organic material in the basin to allow it to rot naturally to produce egg-inducing gas), was used to induce eggs separately in a separate room under a mosquito net. To further ensure the accuracy of the results, all other settings remained the same except for the egg-inducing method. The daily egg production records for each 14 kg pupae under the two egg-inducing methods are shown in Table 1:

[0064] Table 1 Record of daily egg production of 14 kg pupae under two egg-luring methods in a separate room with a mosquito net

[0065]

[0066]

[0067] Draw the data in Table 1 into a line graph, such as Figure 3 shown.

[0068] Table 1 shows the egg yields of 14 kg of black soldier fly pupae after emergence, using the present invention's device and using a traditional egg-laying method. The same batch of pupae, each weighing ≥ 0.155 g, was used. 10 kg of soybean meal was used as the egg-laying material. Recording began on the first day of egg laying and continued until 17 days later, when the majority of black soldier flies had died. The egg yields collected using the two methods are shown in Table 1.

[0069] The total egg collection shows that, with 14 kg of pupae, the device induced a total of 674 g of eggs on the collection plate, with only 0.1 g laid on the outside. In contrast, with the traditional method, 500.1 g of eggs were collected on the collection plate, with 24.7 g laid on the outside. The device of the present invention yielded 12.42 g more eggs per kg of pupae than the traditional method, demonstrating that the gas generator of the present invention significantly increases the effective egg collection and prevents eggs from being laid in areas other than the egg plate.

[0070] Egg counts over the next few days show that, despite the large number of adult black soldier flies having died, the device of the present invention still managed to collect a small number of eggs from delayed-emergence black soldier flies. Using conventional methods, egg counts plummeted between 12 and 13 days, and were completely absent after 15 days. This suggests that internal infestation, combined with fermentation and feeding, caused the material odor to disappear prematurely. This demonstrates that the gas generator of the present invention can prolong the odor generation period, thereby extending the usable life of the material.

[0071] The fluctuations in egg production indicate that the egg-attracting gas generated by the device of the present invention increases the likelihood of adult black soldier flies laying eggs in the first few days. In contrast, with the traditional method, the odor suddenly peaks on the fifth day, leading to a release of eggs that had been stagnant for the previous few days. This demonstrates that the gas generator of the present invention stabilizes egg production in black soldier flies.

[0072] From the data of the whole process of collecting eggs of the same mass of black soldier fly pupae using the gas generating device of the present invention and the traditional method in Table 1, it can be concluded that the use of the gas generating device can ① significantly increase the amount of eggs effectively collected and prevent eggs from being laid in non-egg plate areas; ② extend the use days of the material; and ③ more stabilize the egg production.

[0073] In addition, the egg yields of the method of the present invention and the traditional method in the continuous production process are compared, as shown in Table 2:

[0074] Table 2 Comparison of egg yields in continuous production between the method of the present invention and the traditional method

[0075]

[0076] Draw the data in Table 2 into a line graph, such as Figure 4 shown.

[0077] Table 2 compares the daily egg yields in a large greenhouse using the gas generator of the present invention and conventional methods. The black soldier fly pupae used were sufficient for the entire greenhouse operation, weighing between 0.15 and 0.18 g. The egg-attracting material used was 21 kg of soybean meal. Because the odor of the conventional method decayed too quickly, the 21 kg of soybean meal was divided into two portions, each replaced with a fresh portion after 16 days. Eggs were attracted in two separate attractant boxes / basins. Under these conditions, the egg yields were recorded for a month.

[0078] It can be seen from the total amount of induced eggs that the amount of eggs induced by the device of the present invention is 10629 g, and the amount of eggs induced by the traditional method is 7908.8 g. The amount of eggs induced by the device is significantly higher than that by the traditional method.

[0079] From the egg quantity data of the first few days and the days after 16 days, it can be seen that the traditional method is difficult to produce effective egg-inducing gas in the first few days after the new material is put into the pot, while the egg-inducing effect is more stable when the device is used.

[0080] Comparing the data of the method of the present invention and the traditional method at 5-7 days and 21-23 days, it can be seen that the traditional method is more effective than the device in attracting eggs during these two periods, but the difference is not large. In the rest of the time period, the traditional method is not as good as the device. At 14-15 and 29-30 days, the egg production drops sharply.

[0081] This phenomenon aligns with previous experience: traditional methods lack odor in the early stages of fermentation, ferment too quickly in the middle stages, and the odor fades prematurely in the later stages. This demonstrates that the device can stabilize the production of egg-attracting odor and prolong the duration of odor generation, extending the usable life of the material.

[0082] From the data of continuous egg collection for 30 days in a large greenhouse using the method of the present invention and the traditional method in Table 2, it can be concluded that the use of a gas generating device can ① significantly increase the amount of eggs effectively collected; ② extend the number of days the material can be used; and ③ the egg production is more stable.

[0083] The present invention has been described in detail above with reference to specific exemplary embodiments. However, it should be understood that various modifications and variations may be made without departing from the scope of the present invention as defined by the appended claims. The detailed description and accompanying drawings should be considered merely illustrative and not restrictive, and any such modifications and variations, if any, are intended to fall within the scope of the present invention as described herein. In addition, the background art is intended to illustrate the current status and significance of the present technology and is not intended to limit the present invention or the application and fields of application of the present invention.

[0084] More specifically, although exemplary embodiments of the present invention have been described herein, the present invention is not limited to these embodiments, but rather includes any and all embodiments that may be recognized by those skilled in the art based on the foregoing detailed description, such as combinations between the various embodiments, adaptations, and / or substitutions. The limitations in the claims are to be interpreted broadly based on the language used in the claims and are not limited to the examples described in the foregoing detailed description or during the prosecution of this application, which examples should be considered non-exclusive. Any steps recited in any method or process claim may be performed in any order and are not limited to the order set forth in the claims. Therefore, the scope of the invention should be determined solely by the appended claims and their legal equivalents, rather than by the description and examples given above.

[0085] Unless otherwise specified, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which the present invention belongs. When there is a conflict, the definitions in this specification sheet shall prevail. When rate, pressure, temperature, time, or other values ​​or parameters are expressed as ranges, preferred ranges, or a series of upper preferred ranges and lower preferred ranges, this should be understood to specifically disclose all ranges formed by any pairing of any upper range limit or preferred value with any lower range limit or preferred value, regardless of whether the range is disclosed separately. , 1.5, 1.6, 1.7, 1.8, and 1.9. With respect to subranges, specifically contemplated are "nested subranges" extending from any endpoint within the range. For example, nested sub-ranges of the exemplary range 1-50 may include 1-10, 1-20, 1-30, and 1-40 in one direction, or 50-40, 50-30, 50-20, and 50-10 in the other direction.

Claims

1. A method for inducing black soldier flies to lay eggs, characterized in that: The following device is used to induce eggs: The device comprises a tank body (1), a partition (2), an attractant box (13) and a micro fan (9), wherein: The tank body (1) is provided with a circulating water inlet, a water inlet, a feed inlet and a gas suction outlet on the top thereof; the circulating water inlet is connected to a water suction outlet provided below the tank body (1) via a circulating water pipe; the water inlet is connected to a circulating water pipe and / or an external water supply device; the gas suction outlet is connected to an attractant box (13) via a negative pressure air duct (10); and a micro fan (9) and a flow valve (11) are provided on the negative pressure air duct (10); A hollow partition (2) is fixedly installed inside the tank body (1), fermentation material is spread on the partition (2), and a material extraction port (7) is provided at the lowest point of the partition (2) for extracting the fermentation material; The attracting box (13) is provided with an isolation net (14) for placing black soldier flies to be laid eggs; It also includes a water pump (5) and a pressure boosting port (8), wherein the water pump (5) is arranged on a pipeline at the water pumping port of the tank body (1), the pressure boosting port is arranged on the side wall of the tank body (1), and a micro air pump is arranged at the pressure boosting port (8); It also includes a spray head (4), wherein the spray head (4) is arranged directly above the partition (2), and the spray head (4) is connected to the water inlet; The method comprises the following steps: Step 1, feeding; The fermentation material is fed into the partition (2) from the feed inlet, the fermentation material is laid with a thickness of ≥30 cm, and water is added until the overall moisture content of the fermentation material is 53-55%, and the fermentation material is left to stand to produce egg-attracting gas; The preparation method of the fermentation material is as follows: soybean meal is used as a raw material, 0.3-0.5% equivalent of Bacillus subtilis solution, 0.3-0.5% equivalent of Bacillus licheniformis solution and 0.5-1% equivalent of Staphylococcus saprophyticus solution are added to the soybean meal, the moisture content is adjusted to 45-48%, and pre-fermented for 2 days in a sealed container at room temperature to obtain the fermentation material; Step 2: Pumping air to induce eggs; The pressure in the tank body (1) is increased through the pressure increasing port (8) to maintain the pressure in the tank at 1.2±0.02 standard atmospheric pressure, and then the micro fan (9) is turned on and the flow valve (11) is adjusted to adjust the gas output of the egg-attracting gas to meet the requirements of different attracting areas; Control the gas output of egg-inducing gas to meet the following requirements: The ratio of the gas output to the mass of soybean meal in the fermentation material initially added is ≤2.2, and the ratio of the gas output to the total area of ​​the isolation net (14) on the attractant box (13) is 135-150, wherein the unit of the gas output is L / h, the unit of the mass of soybean meal is kg, and the unit of the area of ​​the isolation net (14) is m 2 ; Step 3: Turn off the device; After the egg induction is completed or when it is not suitable for black soldier flies to lay eggs, the flow valve (11) is directly closed; Step 4: Change materials; The fermentation material is humidified by spraying water into the tank body (1), and then the fermentation material is extracted from the extraction port (7) by the extraction device, and water is continuously sprayed into the tank to clean the entire inner cavity of the tank body (1).

2. A method for inducing black soldier flies to lay eggs according to claim 1, characterized in that: In step 2, during the period of vacuuming and egg induction, water is sprayed on the fermentation material every 2-3 days until water seeps out of the fermentation material, and the seeped water is pumped out through the pumping port to the circulating water inlet for recycling.

Images