CN107736306A - A kind of method for selected black soldier flies larva - Google Patents

Abstract

The invention discloses a method for selecting black soldier fly larvae. The selection tool includes several funnels, the funnel wall of which is in the shape of a screen, the hole size of the screen is 20‑100 mesh, the diameter of the upper part of the funnel is 20‑50 cm, the height of the funnel is 25‑60 cm, and the bottom of the funnel is open The size can be adjusted; first close the bottom opening of the funnel, then pour the black soldier fly larvae whose impurity rate is less than 10% to be selected into the funnel from the upper feeding port, and let it stand still, many impurities can be seen floating on the surface of the funnel, open it The bottom of the funnel is open, and the black soldier fly larvae fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add new black soldier fly larvae whose impurity rate to be selected is lower than 10% from the upper part of the funnel, until the black soldier fly larvae Soldier fly larvae are selected. The invention can obtain black soldier fly larvae with very low impurity rate.

Description

A method for selecting black soldier fly larvae

Technical field:

The invention belongs to the field of black soldier fly breeding, and in particular relates to a method for selecting black soldier fly larvae.

Background technique:

Utilizing the rotting characteristics of black soldier fly larvae to bioconvert food waste into high-value-added insect protein is a potential bio-waste resource application technology. However, in the project of automatic biological treatment of food waste, The produced black soldier fly larvae usually contain a certain amount of impurities (5%-10%). This is because the ingredients of food waste are complex, and ordinary screening machines cannot further remove impurities, and the inorganic parts (plastics) in the impurities , glass, broken porcelain, etc.) have a great risk for later feed processing. Therefore, it is necessary to further improve the screening process to reduce the impurity rate among black soldier fly larvae.

Invention content:

The object of the present invention is to provide a kind of can further remove the impurity in the black soldier fly larva (such as the black soldier fly larva with impurity rate 5～10%) of coarse sieving, obtains a kind of very low impurity rate for selection The method of black soldier fly larvae.

The method for selecting black soldier fly larva of the present invention is characterized in that, comprises the following steps:

Selection tool: the selection tool includes several funnels, the funnel wall of which is screen-shaped, the aperture size of the screen is 20-100 mesh, the diameter of the upper part of the funnel is 20-50 cm, and the height of the funnel is 25 cm. -60cm, the size of the bottom opening of the funnel can be adjusted;

First close the bottom opening of the funnel, then pour the black soldier fly larvae whose impurity rate is less than 10% to be selected into the funnel from the upper feeding port, and let it stand still, many impurities can be seen floating on the surface of the funnel, and open the bottom opening of the funnel , the black soldier fly larvae fall out from the opening at the bottom, remove the impurities floating on the surface of the funnel, and add new black soldier fly larvae whose impurity rate is lower than 10% from the upper part of the funnel, until the black soldier fly larvae are refined Selected.

Preferably, the described method for selecting black soldier fly larvae comprises the following steps:

Selection system: the selection system includes several sets of selection tools, each set of selection tools includes a funnel, a vibration motor and a fixed bracket, one end of the fixed bracket is fixedly connected to the funnel, and the other end is fixedly connected to the vibration motor, Thereby the funnel is fixed on the vibrating motor, the funnel wall of the funnel is in the shape of a screen, the aperture size of the screen is 20-100 mesh, the diameter of the upper part of the funnel is 20-50 cm, the height of the funnel is 25-60 cm, and the diameter of the funnel is 25-60 cm. The size of the bottom opening can be adjusted;

First close the bottom opening of the funnel, then pour the black soldier fly larvae whose impurity rate is less than 10% to be selected into the funnel from the upper feeding port, and let it stand still, many impurities can be seen floating on the surface of the funnel, and open the bottom opening of the funnel And turn on the vibrating motor, the black soldier fly larvae will fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add new black soldier fly larvae whose impurity rate to be selected is lower than 10% from the upper part of the funnel, until the black soldier fly larvae Soldier fly larvae are selected.

The vibrating motor can improve the selection efficiency.

1) The purpose of the funnel-shaped design is to create a space restriction with a large top and a small bottom. The funnel can be round or square, so that the larvae wriggling downward will generate an upward "buoyancy", thereby squeezing impurities into the surface;

2) The wall of the funnel is in the shape of a mesh. This is because the mesh bag structure (20-100 mesh) can produce better ventilation and ventilation effects. Black soldier fly larvae are sensitive to anoxic environments. If airtight materials are used, the funnel The lower larvae will in turn wriggle upwards or not wriggling, thereby reducing the upward lift;

3) The opening at the bottom of the funnel is to output black soldier fly larvae, so that the larvae can be continuously purified through this device;

4) The amount of continuous feeding and continuous discharging must reach a balance, and an upward lift can always be maintained in the funnel device. The black soldier fly larvae will reach the opening at the bottom by doing work, while impurities will remain on the surface;

5) The diameter of the upper feeding port of the funnel relates to the air permeability of the inner central position, and the preferred range is 20-50cm;

6) The height of the funnel relates to the work cost and lift space of the larvae, and the preferred range is 25-60cm;

7) The size of the opening at the bottom of the funnel can be adjusted to increase or decrease the output of larvae as needed;

8) The funnel can be equipped with a vibrating motor to stimulate the behavioral intensity of the black soldier fly larvae through vibration and reduce the work consumption of the larvae;

9) The density of larvae is a limiting factor for generating upward lift. When there are few larvae and many impurities, it will not be able to generate enough lift to push the impurities to the surface. Therefore, the selected larvae must first go through rough selection, and the impurity rate is low at 10%.

10) Due to the limited selection efficiency of one funnel, it is recommended to design multiple funnels on one device, sharing the same feeding and discharging system.

The present invention uses the negative phototaxis (darkness) behavior of black soldier fly larvae to design a funnel-shaped mesh bag structure with an open bottom. When the larvae are desperately wriggling downward, impurities will be "squeezed" to the surface , and then a small amount of impurities are removed manually or with tools, and black soldier fly larvae with a very low impurity rate can be obtained.

Description of drawings:

Fig. 1 is the structural representation of the selected tool of embodiment 1;

Fig. 2 is the structural representation of the selected tool of embodiment 2;

1. Funnel; 2. Upper feed port; 3. Bottom opening; 4. Funnel wall; 5. Fixed bracket; 6. Vibration motor.

detailed description:

The following examples are to further illustrate the present invention, rather than limit the present invention.

Example 1:

The method for selecting black soldier fly larva of the present embodiment may further comprise the steps:

Selection tool: as shown in Figure 1, described selection tool comprises funnel 1, and its funnel wall 4 is sieve-shaped, and the aperture size of sieve is 20 orders, and the diameter of feed inlet 2 at the top of the funnel is 20cm, and the diameter of the funnel is 20cm. The height is 25cm, and the size of the bottom opening of the funnel can be adjusted;

First close the bottom opening 3 of the funnel 1, then pour the black soldier fly larvae to be selected through a coarse sieve and with an impurity rate lower than 10% into the funnel from the upper feeding port, fill up 80% of the funnel volume, and wait Leave for about 10 minutes, it can be seen that many impurities float on the surface of the funnel, open the bottom opening 3 of the funnel, the black soldier fly larvae will continuously fall out from the bottom opening 3, remove the impurities floating on the surface of the funnel from the upper feed port, and remove them from the funnel. The upper feeding port 2 adds new black soldier fly larvae whose impurity rate to be selected is lower than 10%, and maintains the balance of feeding and discharging until the black soldier fly larvae are selected. The impurity rate of the black soldier fly larva falling out from the bottom opening is 1%.

Example 2:

Selection system: as shown in Figure 2, the selection system includes 5 sets of selection tools, each set of selection tools includes a funnel 1, a vibrating motor 6 and a fixed bracket 5, and one end of the fixed bracket 5 is connected to the funnel 1 Fixedly connected, the other end is fixedly connected with the vibrating motor 6, thereby the funnel is fixed on the vibrating motor, the funnel wall 4 of the funnel is screen-like, the aperture size of the screen is 100 mesh, and the diameter of the feed inlet 2 at the top of the funnel is 50cm. The height of the funnel is 60cm, and the bottom opening of the funnel can be adjusted in size;

First close the bottom opening 3 of the funnel, then pour the black soldier fly larvae to be selected through a coarse sieve with an impurity rate of less than 10% into the funnel, fill up 80% of the funnel volume, and let it stand for 10 minutes, and many impurities can be seen Floating on the surface of the funnel, open the bottom opening 3 of the funnel and turn on the vibrating motor 6, the black soldier fly larvae will continuously fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add new to-be-treated worms from the upper feeding port 2 of the funnel. Select the black soldier fly larvae that have been coarsely screened and the impurity rate is less than 10%, and maintain the balance between feeding and discharging until the selection of black soldier fly larvae is completed. The impurity rate of the black soldier fly larva falling out from the bottom opening is less than 1%.

Claims (3)

1. A kind of 1. method for selected black soldier flies larva, it is characterised in that comprise the following steps：

   Selected instrument：Described selected instrument includes several funnels, and its hopper walls is in mesh-like, and the pore size of screen cloth is 20-100 mesh, a diameter of 20-50cm of funnel upper feed inlet, the height of funnel are 25-60cm, the big I of bottom opening of funnel Regulation；

   First the bottom opening of funnel is closed, then black soldier flies larva of the percentage of admixture to be concentrated less than 10% is fallen from upper feed inlet Enter in funnel, stand, it is seen that many impurity float on funnel surface, open the bottom opening of funnel, and black soldier flies larva opens from bottom Mouth drops out, and removes the impurity for floating over funnel surface, and add new percentage of admixture to be concentrated from funnel upper feed inlet and be less than 10% black soldier flies larva, finished until black soldier flies larva is selected.
2. 2. according to the method for claim 1, it is characterised in that comprise the following steps：

   Selecting system：Described selecting system includes the selected instruments of some sets, often cover selected instrument include funnel, vibrating motor and Fixed support, described fixed support one end are fixedly connected with funnel, and other end is fixedly connected with vibrating motor, so as to leak Bucket is fixed on vibrating motor, and the hopper walls of funnel are in mesh-like, and the pore size of screen cloth is 20-100 mesh, and funnel top is fed The a diameter of 20-50cm of mouth, the height of funnel is 25-60cm, and the bottom opening size of funnel can adjust；

   First the bottom opening of funnel is closed, then black soldier flies larva of the percentage of admixture to be concentrated less than 10% is fallen from upper feed inlet Enter in funnel, stand, it is seen that many impurity float on funnel surface, open the bottom opening of funnel and open vibrating motor, Heisui River Horsefly larva drops out from bottom opening, removes and floats over the impurity of funnel surface, and is added from funnel upper feed inlet and new treat essence The black soldier flies larva for selecting percentage of admixture to be less than 10%, finished until black soldier flies larva is selected.
3. 3. method according to claim 1 or 2, it is characterised in that the cross section of described funnel is circular or square.