WO2019071942A1

WO2019071942A1 - Method for optimally selecting hermetia illucens larvae

Info

Publication number: WO2019071942A1
Application number: PCT/CN2018/085966
Authority: WO
Inventors: 安新城; 徐齐云
Original assignee: 广东省生物资源应用研究所
Priority date: 2017-10-12
Filing date: 2018-05-08
Publication date: 2019-04-18
Also published as: CN107736306A; CN107736306B

Abstract

A method for optimally selecting hermetia illucens larvae. An optimal selection tool comprises several funnels (1), funnel wall (4) of the funnel being in the form of a screen, the pore size of the screen being a 20-100 mesh, the diameter of an upper feeding port (2) of the funnel being 20-50 cm, the height of the funnel being 25-60 cm, and the size of the bottom opening (3) of the funnel being adjustable. Said method comprises: first closing the bottom opening (3) of the funnel; then pouring, from the upper feeding port (2), hermetia illucens larvae to be optimally selected with an impurity rate lower than 10% into the funnel (1); standing, it can be seen that a plurality of impurities float on the surface of the funnel; opening the bottom opening (3) of the funnel, the hermetia illucens larvae dropping down from the bottom opening (3); removing the impurities floating on the surface of the funnel; and adding, from the upper feeding port of the funnel, new hermetia illucens larvae to be optimally selected with an impurity rate lower than 10%, until optimal selection of the hermetia illucens larvae is completed. Said method can obtain hermetia illucens larvae with an extremely low impurity rate.

Description

Method for selecting larvae of black otter

Technical field:

The invention belongs to the field of black leeches breeding, and particularly relates to a method for selecting larvae of black leeches.

Background technique:

Using the rot characteristics of black larvae to transform food waste into high value-added insect protein is a promising bio-waste resource application technology. However, in the project of automated bio-disposal of kitchen waste, The black larvae produced by the larvae usually have a certain amount of impurities (5%-10%) because the ingredients of the kitchen waste are complicated, and the ordinary sieving machine can no longer remove impurities, and the inorganic part of the impurities (plastic , glass, broken porcelain, etc.) have great risks for the later feed processing. Therefore, it is necessary to further improve the screening process and reduce the impurity rate in the black larvae.

Summary of the invention:

It is an object of the present invention to provide an impurity which can further remove coarse squid larvae (such as larvae of black leeches having an impurity rate of 5 to 10%), and obtain a very low impurity ratio for use in selection. The method of black larvae larvae.

The method for selecting a black otter larva of the present invention is characterized in that it comprises the following steps:

Selected tools: The selection tool includes several funnels, the funnel wall is mesh-shaped, the mesh has a pore size of 20-100 mesh, the upper funnel inlet diameter is 20-50 cm, and the funnel height is 25 -60cm, the size of the bottom opening of the funnel can be adjusted;

First, close the bottom opening of the funnel, and then pour the black water larvae with the impurity content below 10% from the upper feeding port into the funnel, and let it stand. It can be seen that many impurities float on the funnel surface and open the bottom opening of the funnel. The black pupa larvae fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add a new black pupa larvae to be selected from the upper inlet of the funnel to be less than 10%, until the black larvae larvae The selection is completed.

Preferably, the method for selecting a black otter larva comprises the following steps:

Selected system: The selection system includes several sets of selection tools, each of which includes a funnel, a vibration motor and a fixing bracket, the fixing bracket is fixedly connected at one end to the funnel, and the other end is fixedly connected to the vibration motor. Therefore, the funnel is fixed on the vibration motor, the funnel wall of the funnel is mesh-shaped, the mesh size of the mesh is 20-100 mesh, the inlet of the funnel is 20-50 cm in diameter, the height of the funnel is 25-60 cm, and the funnel is The size of the bottom opening can be adjusted;

First, close the bottom opening of the funnel, and then pour the black water larvae with the impurity content below 10% from the upper feeding port into the funnel, and let it stand. It can be seen that many impurities float on the funnel surface and open the bottom opening of the funnel. And the vibration motor is turned on, the black pupa larvae fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add a new black pupa larvae to be selected from the upper inlet of the funnel to be less than 10%, until black The mink larvae are selected.

Vibration motors increase the efficiency of selection.

1) The purpose of the funnel-shaped design is to create a space limitation of large and small. The funnel can be round or square, so that the downward squirming larvae will produce an upward "buoyancy", thus squeezing the impurities. surface;

2) The funnel wall is mesh-like. This is because the mesh bag structure (20-100 mesh) can produce better ventilation and ventilation effect. The blackwater larvae are sensitive to the anoxic environment. If the airtight material is used, the funnel The lower larvae will in turn squirm or not creep, thereby reducing upward lift;

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

4) The amount of continuous feeding and continuous discharging should reach a balance, and the upward lifting force can be maintained in the funnel device. The black pupa larvae can reach the bottom opening by doing work, and the impurities will remain on the surface;

5) the upper inlet diameter of the funnel relates to the air permeability of the inner central position, preferably in the range of 20-50 cm;

6) The height of the funnel relates to the work cost and lift space of the larva, preferably in the range of 25-60 cm;

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

8) The funnel can be equipped with a vibration motor to stimulate the behavioral intensity of the black larvae by vibration and reduce the larvae's work consumption;

9) Larval density is a limiting factor for the upward force. When there are few larvae and many impurities, it is not able to generate enough lift to push the impurities to the surface. Therefore, the selected larvae must be roughed first and the impurity rate is low. At 10%.

10) Due to the limited efficiency of a funnel, it is recommended to design multiple funnels on one unit to share the same feed and discharge system.

The negative phototaxis (darkness) behavior of the black pupa larvae of the present invention is designed to design a funnel-shaped mesh bag structure with an open bottom. When the larvae are desperately squirming, the impurities are "squeezed" to the surface layer. Then, by cleaning a small amount of impurities by hand or by means of tools, a black larvae with a low impurity rate can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS:

1 is a schematic structural view of a selection tool of Embodiment 1;

2 is a schematic structural view of a selection tool of Embodiment 2;

1, the funnel; 2, the upper feed port; 3, the bottom opening; 4, the funnel wall; 5, the fixed bracket; 6, the vibration motor.

Detailed ways:

The following examples are intended to further illustrate the invention and not to limit the invention.

Example 1:

The method for selecting a black otter larva of this embodiment comprises the following steps:

Selection tool: As shown in Fig. 1, the selection tool comprises a funnel 1, the funnel wall 4 is in the form of a mesh, the mesh has a pore size of 20 mesh, and the upper funnel inlet 2 has a diameter of 20 cm. The height is 25cm, and the size of the bottom opening 3 of the funnel can be adjusted;

First, the bottom opening 3 of the funnel 1 is closed, and then the black larvae larvae whose impurity rate is less than 10% to be selected and sieved are poured from the upper feed port into the funnel to fill 80% of the funnel volume. After 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, and the black pupa larvae continuously fall out from the bottom opening 3, and the impurities floating on the surface of the funnel are removed from the upper feed port, and the funnel is removed from the funnel. The upper feed port 2 is added with new black larvae to be selected with an impurity rate lower than 10%, and the balance of feed and discharge is maintained until the black larvae are selected. The black pupa larvae that fell out of the bottom opening had an impurity rate of 1%.

Example 2:

Select system: As shown in Figure 2, the selection system includes 5 sets of selected tools, each set of tools including a funnel 1, a vibration motor 6 and a fixed bracket 5, the fixed bracket 5 end and the funnel 1 The fixed connection is connected, and the other end is fixedly connected with the vibration motor 6 to fix the funnel to the vibration motor. The funnel wall 4 of the funnel has a mesh shape, the mesh size of the mesh is 100 mesh, and the inlet port 2 of the funnel has a diameter of 50 cm. The height of the funnel is 60 cm, and the size of the bottom opening 3 of the funnel can be adjusted;

First, close the bottom opening 3 of the funnel, and then pour the black pupa larvae to be selected into coarse sieves with an impurity rate lower than 10% into the funnel, fill 80% of the funnel volume, and let stand for 10 minutes, showing many impurities. Floating on the surface of the funnel, open the bottom opening 3 of the funnel and open the vibration motor 6. The blackwater larvae continually fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add new ones from the upper inlet 2 of the funnel. The black larvae, which have been coarsely sieved and have an impurity rate of less than 10%, are maintained to maintain a balance between feed and discharge until the black larvae are selected. The black pupa larvae that fall out of the bottom opening have an impurity rate of less than 1%.

Claims

A method for selecting larvae of black otter, characterized in that it comprises the following steps:

Selected tools: The selection tool includes several funnels, the funnel wall is mesh-shaped, the mesh has a pore size of 20-100 mesh, the upper funnel inlet diameter is 20-50 cm, and the funnel height is 25 -60cm, the size of the bottom opening of the funnel can be adjusted;

First, close the bottom opening of the funnel, and then pour the black water larvae with the impurity content below 10% from the upper feeding port into the funnel, and let it stand. It can be seen that many impurities float on the funnel surface and open the bottom opening of the funnel. The black pupa larvae fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add a new black pupa larvae to be selected from the upper inlet of the funnel to be less than 10%, until the black larvae larvae The selection is completed.
The method of claim 1 including the steps of:

Selected system: The selection system includes several sets of selection tools, each of which includes a funnel, a vibration motor and a fixing bracket, the fixing bracket is fixedly connected at one end to the funnel, and the other end is fixedly connected to the vibration motor. Therefore, the funnel is fixed on the vibration motor, the funnel wall of the funnel is mesh-shaped, the mesh size of the mesh is 20-100 mesh, the inlet of the funnel is 20-50 cm in diameter, the height of the funnel is 25-60 cm, and the funnel is The size of the bottom opening can be adjusted;

First, close the bottom opening of the funnel, and then pour the black water larvae with the impurity content below 10% from the upper feeding port into the funnel, and let it stand. It can be seen that many impurities float on the funnel surface and open the bottom opening of the funnel. And the vibration motor is turned on, the black pupa larvae fall out from the bottom opening, remove the impurities floating on the surface of the funnel, and add a new black pupa larvae to be selected from the upper inlet of the funnel to be less than 10%, until black The mink larvae are selected.
Method according to claim 1 or 2, characterized in that the funnel has a circular or square cross section.