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Method for separating of synanthropic flies from substrate

Method for separating of synanthropic flies from substrate
IPC classes for russian patent Method for separating of synanthropic flies from substrate (RU 2290795):
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FIELD: agriculture, in particular, processing of animal wastes using biological processes.

SUBSTANCE: method involves placing processed substrate with synanthropic fly larvae living thereon into reservoir by means of belt conveyor; setting velocity of belt conveyor so as to provide migration of larvae from substrate thickness into reservoir, onto its surface, said velocity depending on thickness of substrate layer: the greater is thickness of substrate layer , the lower is the velocity, and larvae concentration in upper part of reservoir being provided by making width of reservoir lower part exceeding width of its upper part; upon filling of reservoir, stopping feeding of substrate and removing larvae from upper part of reservoir by means of conveyor equipped with rectangular plates; removing substrate remained in reservoir by means of screw-type conveyor.

EFFECT: reduced metal usage, simplified construction of apparatus, decreased manufacture costs, reduced time for separation of synanthropic fly larvae from substrate and increased percentage of separated fly larvae from substrate.

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The alleged invention relates to agriculture, and is intended for processing animal waste by biological method.

The purpose of the processing - recycling animal waste (pig manure, chicken manure, polluting the environment, obtaining larvae of synanthropic flies are used as raw materials for the production of protein-lipid concentrate of biologically active substances, antibiotics. Recycled larvae manure and litter are a valuable organic fertilizer that can protect plants from many pests and diseases, to decompose many toxic substances that occur in water and soil.

There are many facilities for culturing larvae of synanthropic flies on livestock waste. There are different ways of separation grown larvae from the processed substrate. To implement known methods of separation of the larvae of synanthropic flies from recycled substrate, there are many facilities-separators.

A known way of separating larvae of house flies in patent RU No. 2170011, we adopted for the analogue, in which the separation of the larvae of synanthropic flies carried out by placing using a belt conveyor of the processed substrate with dwelling in him larvae in the tank. This method has the following disadvantages. Sposobov on instinct larvae under predskolni to leave the processed substrate. However, as practice shows, the larvae under predskolni leave the substrate (regardless of its degree of processing) only if it is their performance is not suitable for the process of pupation. The tendency of the larvae to leave the substrate is influenced by such factors as humidity and temperature of the substrate. The higher the humidity, the greater the tendency of the larvae to leave the substrate. The temperature of the substrate induces larvae to migrate from it if it is close to the amount lethal to larvae. Larvae of house flies prefer to accumulate for the process of pupation in the most heated and dry areas of the processed substrate, provided that the temperature of the substrate does not reach lethal values, and its moisture content is not more than 60%. The blowout of the processed material heated air in the absence of the shell to secure the leads to rapid loss of moisture and to create conditions favorable substrate for pupation. Faces not tolerate drafts, so a rinsing of the substrate with larvae air prevents the larvae on the surface of the substrate and the migration of larvae from him. In addition, larvae that are separating from the substrate, pulls together a significant amount of substrate (up to 1/3), which requires additional re Department As practice shows, for larvae hadn't pulled a substrate with a horizontal plane, they need to overcome the distance from the edge of the processed substrate to the edge of the surface on which the substrate (tray without flanges, conveyer belt etc), not less than 50 cm, which is irrational, as it requires additional space. Therefore, in this case the larvae leave the substrate is not due to the fact that it is not suitable for pupation and accidentally fall off the edge of the conveyor belt as a result of high mobility of the larvae under predskolni. However, many larvae remains in the substrate, remaining on the conveyor belt.

A known way of separating larvae of house flies from the substrate by A.S. No. 1161051, we adopted for the prototype, which for separating larvae of the substrate with living larvae in it being poured into a perforated container, and the container is placed in an airtight container, from which pump out the air.

However, this method has the following disadvantages. The compressor consumes electricity, the container must be sealed, which increases the cost and complicates its design and operation. In the process of pumping air from the container, the larvae lose their orientation in space, as they can not find a zone with relatively high oxygen content, nachinayutheesya chaotic and disorderly, that reduces the rate of separation of larvae from the substrate.

The engineering problem is to increase the percentage separation of the larvae of synanthropic flies from the substrate, reducing the time separation of the larvae of synanthropic flies from the substrate, the reduction of metal consumption, simplify and cheapen the construction of the device.

This goal is achieved by a method in which a substrate with larvae pour in the capacity of the hub with the speed at which larvae of synanthropic flies will be able to climb into the top layer of the substrate before they are falling asleep on top of the substrate. Thus, on the surface of the substrate, as the tank is filled, the hub will be constantly concentrate larvae of synanthropic flies. Accumulated on the surface of the substrate larvae of synanthropic flies are removed from the top of the tank, hub, and from the bottom of the tank hub remove abandoned by the larvae of the substrate.

It is known that in the processing of swine manure or poultry litter larvae of house flies do not penetrate into the substrate deeper than 8-10 inches, even if they lack power in the upper layer, and at greater depths is not processed substrate. As it is at this depth (8-10 cm) in the processed substrate penetrates the air in quantities sufficient for breathing larvae.

Tank height-conc the Torah exceeds its width, and the width of the bottom of the tank hub to exceed the width of the upper part of the vessel hub that best contributes to the concentration of larvae in the upper part and pouring abandoned larvae of the substrate during removal of the substrate from the container hub in its lower part.

As the experiments showed, the height of such capacity hub shall be not less than 45 cm and not more than 150 centimeters. When the vessel height of the hub less than 45 centimeters larvae of synanthropic flies due to their relatively low concentration in the substrate is very slow to migrate to the upper layer, because in the process of pouring in the capacity of the hub, the substrate is saturated with oxygen, which makes the spatial orientation of the larvae. When the vessel height and the hub 45 centimeters increasing the concentration of larvae in the tank the hub goes faster, penetrating into the substrate of the air is not enough for breathing all larvae and they quickly rush into the top layer of the substrate. Height to increase the capacity of the hub more than 150 centimeters is impractical because the layer focused larvae may exceed 10 inches. When the concentration of the larvae without substrate layer more than 10 inches larvae choking, emit large amounts of moisture, become sticky and art is to migrate from Russia capacity of the hub, razbegaesh in all directions.

The increase of the distance between the vessel wall of the hub need for better sliding abandoned larvae of the substrate in the lower part of the capacity of the hub in the process of its removal, as in the case of parallel arrangement of the vessel wall of the hub between them may hang substrate.

From the prototype of the inventive method is characterized by the fact that before the separation of larvae from the substrate they are concentrated in the upper part of the vessel hub by pouring substrate with larvae in the capacity of the hub with the speed at which larvae of synanthropic flies will be able to migrate into the upper layer of the substrate, before they will be covered rolling on top of the substrate. In the process of lling the hub substrate larvae will be able to navigate in space, so will purposefully seek in the upper part of the capacity of the hub, where the substrate enters the air for breathing.

After lling the hub substrate and the concentration of larvae of synanthropic flies in its upper part larvae removed from the container hub in any known manner, for example by a conveyor, scraper conveyor or manually by the scraper. As the experiments have shown, for removal of larvae is most suitable scraper conveyor the plates of rectangular shape.

To separate the larvae of the proposed method requires no compressor or pressurized container.

The essence of the proposed invention is illustrated below in the following description and the accompanying graphic material.

The drawing shows one of possible variants of the device for implementing the inventive method. The device is designed as a belt conveyor 1, the feed mixture zoohouse and larvae in the capacity of the hub 2. In the upper part of the vessel of the hub is made of plate conveyor 3 for removal of the larvae, and in the lower part of the vessel of the hub 2 has a screw conveyor 4 for removal of the substrate. The feed rate of the substrate with living in it by the larvae of synanthropic flies should be such that larvae were able to migrate from the thickness of the substrate in the upper part of the capacity of the hub and to accumulate on the surface of the substrate. Tests have shown, the feed speed of the substrate in the capacity of the hub 2 depends on its size, mainly to its width, the wider the capacity of the hub 2, the higher should be the speed of feed of the mixture of zoohouse and larvae in the capacity of the hub, and hence the device performance. As the experiments showed, width capacity hub in its upper part should not exceed 40 centimeters, because when t is some width of the upper part of the vessel hub accumulated in the vessel, the hub larvae level asiaasia slide substrate in a flat surface, which significantly reduces the loss of larvae during their removal from the upper part of the vessel the hub plate belt. When the width of the upper part of the vessel less than 40 centimeters performance of the separator is reduced, which is impractical. In addition, the speed of belt conveyor depends on the thickness of the layer on the substrate with larvae, the thicker the layer, the slower its speed.

The device operates as follows. The conveyor 1 delivers a mixture of zoohouse and larvae in the capacity of the hub 2 with an open top. As the pouring of the substrate and dwelling in him larvae in the capacity of the hub 2 larvae contained in the substrate, out of breath the whole is contained in the thickness of the substrate, the oxygen will tend to migrate from the thickness of the substrate in the upper layer. Because it's in the top 10-cm layer of the substrate enters the air in quantities sufficient for breathing larvae of synanthropic flies.

Thus, the capacity of the hub 2 will be an accumulation of the substrate and the fixed larvae (sick, damaged, etc), starting from the bottom, and the concentration of healthy and motile larvae first in the upper layer of the substrate, and then on its surface. The above process will continue until such time as the capacity of the hub 2 is filled to a working C the plate by the conveyor 3. Then feed substrate with dwelling in him larvae cease. Larvae of synanthropic flies, which were concentrated in the upper part of the vessel the hub 2, pay out using a plate conveyor 3, and after their removal to remove the remaining capacity of the hub 2 free mobile larvae substrate by means of a screw conveyor 4. Then the device is again ready for operation and the whole cycle repeats itself.

If the feed rate of the conveyor belt 1 substrate with living in it by the larvae of synanthropic flies in the capacity of the hub 2 to increase above the optimum, larvae, especially in the initial period of separation will not be able to migrate into the upper layer of the substrate. Because of its thicker contains some oxygen, up to 50% of the larvae will not migrate up until you spend it on the breath. Furthermore, as the experiments showed, if larvae of house flies will be covered with a layer of the substrate more than 45 cm, they can lose spatial orientation and die in the thickness of the substrate, leaving on its surface. Naturally, the more larvae contained in the substrate, the faster they will spend supply of oxygen in the thickness of the substrate and, consequently, the faster will separate from the substrate, migrating in the upper zone. Usually, by the end of the branch l is the escarpment from the substrate at the top of larvae accumulate a layer of more than 10 cm, practically free from impurities of the substrate.

The method of selection by larvae of synanthropic flies from the stern of the substrate, including the premises of the belt conveyor processed substrate with living in it by the larvae of synanthropic flies in a container, characterized in that the speed of belt conveyor installed to ensure the migration of larvae of the thickness of the substrate in a container on its surface, and the thicker layer of the substrate placed on the conveyor, the lower its velocity, and the concentration of larvae in the upper part of the vessel provide by performing bottom of the tank with a width greater than the width of the upper part when the tank is filled, the supply of substrate, stop and remove from the top of the tank larvae through the conveyor belt with plates of rectangular shape, and the remaining capacity of the substrate is removed by a screw conveyor.

 

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