WO2018169215A1 - Feed composition for fish cultivation, feed comprising same, and preparation method therefor - Google Patents

Abstract

The present invention relates to: a feed composition for fish cultivation, comprising a binder and feed ingredients containing nutrients; a feed comprising the same; and a preparation method therefor, wherein the binder comprises a carbohydrate ingredient and a cellulose ether, the amount of the carbohydrate ingredient is 10.5-20.8 wt% on the basis of the total weight of the feed composition for fish cultivation, the viscosity of the cellulose ether is 60,000-280,000 cps when measured under a condition of 20 °C and 3-6 rpm by means of Brookfield (LV) viscometer on the basis of an aqueous solution having a concentration of 2.0 wt%, and the amount of the cellulose ether is 1.0-10.5 wt% of the basis of the weight of the carbohydrate ingredient. The feed composition for fish cultivation, according to the present invention, can provide a feed having improved binding force and hydrophilicity, thereby being capable of solving a water quality deterioration problem caused by feed loss, and improves the ingestion of fish to be cultivated, thereby improving the growth rate of the fish to be cultivated.

Description

Feed composition for fish farming, feed comprising the same and method for producing same

The present invention relates to a feed composition for fish farming, a feed comprising the same, and a method for producing the same, and more particularly, by using a binder including a carbohydrate component and a cellulose ether in a specific ratio, a feed having improved binding force and hydrophilicity is provided. It relates to a feed composition for farming fish which can be provided, a feed comprising the same and a method of manufacturing the same.

The aquaculture industry is taking up an increasing share of fisheries in terms of maintaining the food of the people by reliably supplying large quantities of fish and shellfish in response to changes in diet, while coping with fish damage caused by extreme weather and changes in fish species in the offshore.

In aquaculture, feed is not only an important factor that directly affects the growth and health of fish, but also an increasing interest in feed due to its high share of fish production. These fish feeds can be largely classified into live feed, wet feed (Moist Pellet: MP), compound feed (Extruded Pellet: EP) and the like.

Raw feed is a feed that is fed in the form of living organic organisms, with a high rate of loss in water when fed to farmed fish. This lost feed is sinking under the sea, causing it to rot, becoming a source of diseases such as coastal fisheries pollution and pathogen transmission. In addition, the wet feed mixed with the powdered feed and various additives in the raw feed also has a lower binding capacity than the feed compound, and is easily collapsed when fed to the fish tank, and the water penetrates quickly and easily sinks, which causes loss of feed. It acts as a decisive factor in polluting coastal waters.

In this regard, there is a demand for conversion to extruded pellets that have been extruded and dried in a certain form. However, compound feeds are expensive, fish farming growth and feed efficiency is low compared to raw or wet feeds, and because of the feed intake and digestion problems, many fishers are reluctant to use them. Thus, the share of compound feed in the whole fish feed market is still only 23%. Therefore, research and development on high-efficiency blended feed is continuously progressing.

For example, Patent Document 1 (Domestic Patent Publication No. 10-1087019) contains natural physiologically active substances such as mushroom lactic acid fermented milk, algae polysaccharide, and ganban stone, thereby enhancing anti-competence by enhancing the natural immunity of marine fish and increasing hemoglobin. Improvement of oxygen transport ability, prevention of anemia, promotion of carbohydrate digestion and intestinal absorption, improvement of feed efficiency, improvement of meat quality by increasing natural minerals and vitamins, and reduction of mortality by improvement of water environment of aquaculture tank Aquaculture feed additives for marine fish and marine fish farming feed comprising the same are disclosed.

In addition, Patent Document 2 (Korean Patent Laid-Open Publication No. 10-2014-0105941) discloses a feed and a method of manufacturing the same, which are capable of injuring for a long time on the surface of aquaculture farms by combining a binder and a lipophilic coating agent in a feed ingredient containing a nutrient source. It is. According to Patent Document 2, by using a floating feed can increase the feed diet of fish and reduce the amount of feed lost can contribute to improving the productivity of aquaculture.

However, the fish feeds proposed in Patent Documents 1 and 2 also have a low binding loss, resulting in a high feed loss rate, which acts as a decisive factor in polluting farms and coastal waters.

In addition, the fish feed has the problem that the hydrophilicity, for example, the water absorption capacity that indicates the ability to absorb the water by absorbing the water may have a negative effect on the digestion, absorption capacity after the feed of the fish. Specifically, in the case of a feed that can absorb a large amount of water compared to the same time while maintaining the form of the feed, i.e., phase stability in aquatic conditions, it is more likely to be digested and absorbed after being ingested by fish farming. Good conditions can improve the growth rate of fish farming.

Therefore, there is an urgent need for research on feed compositions for farmed fish that can produce a high binding and hydrophilic feed.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) KR101087019 B

(Patent Document 2) KR1020140105941 A

The present invention provides a fish farming feed composition that can provide a fish feed improved binding and hydrophilicity (water absorption) by using a binder containing a carbohydrate component and a cellulose ether having a viscosity of 60,000 ~ 280,000cps in a specific ratio To provide.

In addition, the present invention is to provide a fish feed and a manufacturing method comprising the feed composition for fish farming.

In order to solve the above problems, the present invention is a fish farming feed composition comprising a feed ingredient and a binder containing a nutrient source, the binder comprises a carbohydrate component and a cellulose ether, the content of the carbohydrate component It is 10.5 ~ 20.8% by weight relative to the total weight of the fish culture feed composition, the viscosity of the cellulose ether is 20 ℃ and 3 ~ 6rpm conditions using a Brookfield (LV) viscometer based on an aqueous solution of 2.0% by weight concentration As measured by 60,000 ~ 280,000cps, the content of the cellulose ether provides a fish culture feed composition, characterized in that 1.0 ~ 10.5% by weight relative to the carbohydrate component weight.

The carbohydrate component is selected from wheat flour, corn flour, rice flour, barley flour, potato flour, sweet potato flour; It may include at least one selected from the group consisting of tapioca starch, potato starch, sweet potato starch, rice starch, oat starch, soybean starch, barley starch and modified starch thereof.

The cellulose ether is at least one selected from the group consisting of alkyl cellulose, hydroxyalkyl cellulose, hydroxyalkyl alkyl cellulose, and alkyl alkyl hydroxylalkyl cellulose. Preferably, the cellulose ether is at least one selected from the group consisting of methyl cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, methylethyl hydroxyethyl cellulose and ethyl hydroxyethyl cellulose. It may include.

On the other hand, the present invention provides a fish farming feed comprising the feed composition for fish farming.

The feed may have one or more forms selected from granules, pills, and pellets.

In addition, the present invention provides a method for producing a feed for fish farming, the method for preparing a feed formulation by combining a feed ingredient and a binder containing a nutrient source; And adding water to the feed formulation and mixing the same, followed by molding. The binder includes a carbohydrate component and a cellulose ether, and the content of the carbohydrate component is 10.5 to 20.8 weight based on the total weight of the fish farming feed. %, The viscosity of the cellulose ether is 60,000 ~ 280,000cps when measured at 20 ℃ and 3 ~ 6rpm conditions using a Brookfield (LV) viscometer based on an aqueous solution of 2.0% by weight concentration, the cellulose ether The content of the carbohydrate component is characterized in that 1.0 to 10.5% by weight.

Molding of the feed formulation may be carried out using any one selected from extruders, impeller mixers and kneaders.

Fish culture feed production method according to the invention may further comprise a step of drying, after the molding step of the feed formulation is completed.

Since the feed composition for fish culture according to the present invention can provide a feed with improved binding power, it is possible to lower the wear and tear of the feed and improve the stability of the aqueous phase. Due to this, the loss rate of feed in the water system can be minimized, and as a result, the economic degradation can be improved along with the problem of water degradation caused by the lost feed.

In addition, the feed prepared using the feed composition exhibits high hydrophilicity (water absorption). Therefore, the fish feed according to the present invention can absorb a large amount of water compared to the same time while maintaining the form of the feed, that is, the phase stability in aquatic conditions for a certain time, after ingestion by aquaculture fish, digestion, absorption Better conditions can improve the growth rate of fish farming.

The present invention relates to a feed composition for fish farming comprising a feed ingredient and a binder comprising a nutrient source, a feed comprising the same, and a manufacturing method thereof, wherein the binder comprises a carbohydrate ingredient and a cellulose ether, The content is 10.5 to 20.8% by weight based on the total weight of the fish culture feed composition, the viscosity of the cellulose ether is 20 ℃ and 3 ~ 6rpm using a Brookfield (LV) viscometer based on an aqueous solution of 2.0% by weight concentration When measured under the condition of 60,000 ~ 280,000cps, the content of the cellulose ether is characterized in that 1.0 to 10.5% by weight relative to the carbohydrate component weight.

The feed ingredient refers to a substance that maintains the life of the fish and supplies organic or inorganic nutrients necessary for growing the fish, and if the substance contains nutrients such as protein, carbohydrates, fats, vitamins, minerals, etc. It can be used without limitation. For example, the feed ingredients include animal raw materials such as fish meal, casein and squid powder, vegetable raw materials such as soybean meal, wheat flour and starch, microbial raw materials such as feed yeast, animal fats and oils such as cod liver oil and squid liver oil, soybean oil and rapeseed oil. It may include one or more raw materials selected from vegetable oils, vitamins, minerals, amino acids, antioxidants and the like.

The binder used in the feed composition for fish farming according to the present invention is added to enhance water absorption with the binding power of the feed, and includes a carbohydrate component and a cellulose ether. Specifically, since the binder improves the binding force of the feed to lower the wear and tear and improve the phase stability in the water system can be minimized the loss rate of feed during the feeding process. In addition, the feed produced using the feed composition comprising the binder is excellent in water absorption, so when fed to aquaculture tanks can be softened in a good state to eat fish can be improved intake of fish farming.

The carbohydrate component plays a role as a carbohydrate source and improves the binding properties of fish farming. Examples of such carbohydrate components include grain flour selected from wheat flour, corn flour, rice flour, barley flour, potato flour and sweet potato flour; At least one selected from the group consisting of tapioca starch, potato starch, sweet potato starch, rice starch, oat starch, soybean starch, barley starch and modified starch thereof may be used. In this case, the modified starch refers to a chemical, physical or enzymatically treated natural starch, for example, dextrin, oxidized starch, oxygenated starch, alpha (α) starch, starch derivatives, but is not limited thereto.

The content of the binder is 10.5 to 20.8% by weight based on the total weight of the fish culture feed composition according to the present invention. When the content of the binder is less than 10.5% by weight, the problem of inferior binding property of the feed occurs, whereas when the content exceeds 20.8% by weight, the content of the feed ingredient containing nutrients is relatively reduced, so the relative growth rate of fish farming is Will fall.

The cellulose ether is derived from cellulose, which is a vegetable material, and refers to a cellulose derivative in which the hydroxy group of cellulose is etherified using an etherifying agent.

The cellulose ether is at least one selected from the group consisting of alkyl cellulose, hydroxyalkyl cellulose, hydroxyalkyl alkyl cellulose, and alkyl alkyl hydroxyalkyl cellulose. It may include, preferably include at least one selected from the group consisting of methyl cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, methylethyl hydroxyethyl cellulose and ethyl hydroxyethyl cellulose Can be.

The viscosity of the cellulose ether is characterized in that 60,000 ~ 280,000cps when measured under the conditions of 20 ℃ and 3 ~ 6rpm using a Brookfield (Brookfield, LV) viscometer based on an aqueous solution of 2.0% by weight. When the viscosity of the cellulose ether is less than 60,000 cps, the binding force of the feed is lowered, resulting in poor image stability and wear resistance in the aqueous system. On the other hand, when the viscosity of the cellulose ether exceeds 280,000 cps, the binding capacity of the feed is excessively high, which results in a negative effect on the digestibility of fish farming.

 The content of the cellulose ether is characterized in that 1.0 to 10.5% by weight relative to the weight of the carbohydrate component. When the content of the cellulose ether is less than 1.0% by weight of the carbohydrate component, the problem of binding and hydrophilicity of the feed is reduced, whereas when the content of more than 10.5% by weight is excessively expensive, economic efficiency is lowered and the digestibility of fish farming Problem occurs.

On the other hand, the present invention provides a fish farming feed comprising the feed composition for fish farming. The feed may have one or more forms selected from granules, pills, and pellets, and may preferably have pellets.

In the case of aquaculture feed prepared in accordance with the present invention, because of the excellent binding force due to the binder in the feed composition, the wear resistance during the feeding process and the stability in the aqueous phase can be improved, and as a result, the loss rate of the feed in the water system Can be minimized. In addition, the feed exhibits a high water absorption, so that when fed to aquaculture tanks softened to a good state to eat fish can improve the intake of fish farming.

In addition, the present invention provides a method for producing a feed for fish farming, the manufacturing method comprises the steps of preparing a feed formulation by combining a feed ingredient and a binder containing a nutrient source; And adding water to the feed formulation and mixing the same to form a predetermined form.

At this time, the component, the content, and the like of the binder are as described above. Specifically, the binder comprises a carbohydrate component and a cellulose ether, the content of the carbohydrate component is 10.5 ~ 20.8% by weight relative to the total weight of the fish farming feed, the viscosity of the cellulose ether is an aqueous solution of 2.0% by weight concentration As a standard, it is 60,000 to 280,000 cps when measured at 20 ° C. and 3 to 6 rpm using a Brookfield (LV) viscometer, and the content of the cellulose ether is 1.0 to 10.5 wt% based on the weight of the carbohydrate component. It is done.

In addition, the molding of the feed mixture may be performed using a conventionally known device, and preferably may be performed using any one selected from an extruder, an impeller mixer, and a kneader. Through this molding process, the feed formulation may be molded into granules, pills, or pellets, and may be molded into pellets.

The method for producing a fish feed for fish according to the present invention may further include a step of drying as necessary after the molding step of the feed formulation is completed. In this case, as the drying method, a conventional known drying method may be used without limitation, and for example, natural drying, hot air drying or high temperature drying may be used. In the drying process, the fish feed may be dried in a semi-dry state containing some moisture, or may be dried in a completely dry state.

Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to these Examples.

Example 1

A feed formulation was prepared by combining 79% by weight of fish meal, 20.5% by weight of starch (AA alpha starch, Daesang Co., Ltd.) and 0.5% by weight of hydroxypropyl methyl cellulose (HPMC 2208, AnyAddy ^® , Lotte Fine Chemical Co., Ltd.). In this case, the content of the hydroxypropyl methyl cellulose (HPMC) is 2.4% by weight relative to the starch weight. In addition, the viscosity of the hydroxypropyl methyl cellulose is 180,000cps, the viscosity is a value measured based on an aqueous solution of 2.0% by weight concentration at 20 ℃ and 3rpm conditions using a Brookfield (LV) viscometer.

Subsequently, water was added to the feed formulation and mixed, followed by extrusion with an extruder (ATX-II, manufactured by fesco) to prepare a feed in pellet form. At this time, 120 parts by weight of water was added based on 100 parts by weight of the feed composition.

The pellet form feed was then dried at 60 ° C. for 180 minutes to prepare a feed composition.

Examples 2 to 11 and Comparative Examples 1 to 3

The content of the fish meal, starch and HPMC, and the content ratio of HPMC to the starch (HPMC / starch) and the viscosity of the HPMC was adjusted in the same manner as in Example 1 except that Feed composition was prepared.

<Evaluation Method>

1.wearing degree (%)

The wear and tear of the feed composition prepared according to Examples 1 to 11 and Comparative Examples 1 to 3 was measured using a friability tester (Pharma Test, PTF20E), the results are shown in Table 1 below.

2. Water Absorption (Δwt%, 20min)

The water absorbency (hydrophilicity) was evaluated by the amount of water absorbed by the feed composition for 20 minutes when the feed composition prepared according to Examples 1 to 11 and Comparative Examples 1 to 3 was added to water. The water absorption was calculated according to the following equation (1), the results are shown in Table 1 below.

Water absorption (Δwt%) = {(W ₂ -W ₁ ) / W ₁ } * 100... (One)

In Formula (1), W ₁ is the weight of the feed composition before adding to water, W ₂ is the weight of the feed composition after adding to water for 20 minutes.

3. Phase stability (SS analysis, mg / L)

Phase stability in the aqueous system was evaluated by the amount of suspended solids (suspended solid) generated when the feed composition prepared according to Examples 1 to 11 and Comparative Examples 1 to 3 in water. The amount of suspended solids was measured based on the water quality testing method.

In this case, a glass fiber filtration device (Joint 40/35 Joint Connect 47 mm Vacuum Filter Holder Set, Wheaton) was used as an experimental device, and the weight difference between the filter paper before and after filtration was calculated as described in Equation (2) below. Phase stability was calculated from the amount of suspended solids, and the results are shown in Table 1 below.

Phase stability (mg / L) = {(b-a) / V} * 1000... (2)

In Equation (2), a is the weight of the filter paper before filtration (mg), b is the weight of the filter paper after filtering the water containing the suspended solids (mg), V is the amount of water introduced into the filter (ml) Indicates.

	Fish meal (% by weight)	Starch (wt%)	HPMC (% by weight)	HPMC / starch (% by weight)	HPMC Viscosity (cps)	Wear and tear (%)	Water Absorption (Δwt%, 20min)	Phase stability (mg / L)
Example 1	79.0	20.5	0.5	2.4	180,000	1.03	33.8	140
Example 2	79.0	20.0	1.0	5.0	180,000	0.32	36.0	90
Example 3	79.0	19.0	2.0	10.5	180,000	0.28	36.9	80
Example 4	84.0	15.5	0.5	3.2	180,000	1.21	31.3	160
Example 5	88.0	11.5	0.5	4.3	180,000	2.07	31.9	180
Example 6	88.5	11.0	0.5	4.5	180,000	1.95	31.0	510
Example 7	89.0	10.5	0.5	4.8	180,000	2.29	30.9	720
Example 8	79.0	20.6	0.4	1.9	180,000	1.66	31.7	160
Example 9	79.0	20.7	0.3	1.4	180,000	2.12	31.4	610
Example 10	79.0	20.8	0.2	1.0	180,000	2.09	31.0	630
Example 11	79.0	20.5	0.5	2.4	100,000	1.88	32.1	220
Comparative Example 1	79.0	21.0	0.0	0.0	180,000	4.33	29.3	1920
Comparative Example 2	79.0	20.9	0.1	0.5	180,000	4.08	30.2	1250
Comparative Example 3	79.0	20.5	0.5	2.4	15,000	3.78	30.1	1090

* "HPMC / starch" is the content of HPMC relative to the starch weight, represents the content of HPM when the starch is converted to 100% by weight, calculated according to the formula {(HPMC weight / starch weight) * 100} Value.

Looking at Table 1, in the case of the feed composition prepared according to Examples 1 to 11 of the present invention, Comparative Example 1 containing only starch as a binder, "HPMC / starch" of Comparative Example 2 and HPMC less than 1.0% by weight of Compared with Comparative Example 3 having a viscosity of less than 60,000 cps, the wear resistance and the phase stability in the aqueous phase were lowered. In addition, in the case of Examples 1 to 11, it can be seen that the feed composition having a high water absorption can be provided to provide a feed having excellent intake.

As described above, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to explain the present invention, and the scope of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto. Should be construed as being included in the scope of the present invention.

Claims (9)

1. As a feed composition for fish farming comprising a feed ingredient and a binder containing a nutrient source,

   The binder comprises a carbohydrate component and a cellulose ether,

   The content of the carbohydrate component is 10.5 ~ 20.8% by weight based on the total weight of the fish farming feed composition,

   The viscosity of the cellulose ether is 60,000 ~ 280,000cps when measured at 20 ℃ and 3 ~ 6rpm conditions using a Brookfield (LV) viscometer based on an aqueous solution of 2.0% by weight concentration,

   The content of the cellulose ether is fish aquaculture feed composition, characterized in that 1.0 to 10.5% by weight relative to the carbohydrate component weight.
2. The method of claim 1,

   The carbohydrate component is selected from wheat flour, corn flour, rice flour, barley flour, potato flour, sweet potato flour; Tapioca starch, potato starch, sweet potato starch, rice starch, oat starch, soybean starch, barley starch and starch selected from their modified starch; fish culture feed composition comprising at least one selected from the group consisting of.
3. The method of claim 1,

   The cellulose ether is at least one selected from the group consisting of alkyl cellulose, hydroxyalkyl cellulose, hydroxyalkyl alkyl cellulose, and alkyl alkyl hydroxylalkyl cellulose. Fish culture feed composition comprising a.
4. The method of claim 1,

   The cellulose ether comprises at least one selected from the group consisting of methyl cellulose, hydroxyethyl cellulose, hydroxyethyl methyl cellulose, hydroxypropyl methyl cellulose, methylethyl hydroxyethyl cellulose and ethyl hydroxyethyl cellulose. Feed composition for fish farming.
5. Fish culture feed comprising the feed composition for fish farming according to any one of claims 1 to 4.
6. The method of claim 5,

   The feed for fish farming, characterized in that it has at least one type selected from granules, pills, and pellets (form).
7. Preparing a feed formulation by combining a feed ingredient and a binder including a nutrient source; And

   Including; forming after mixing by adding water to the feed formulation;

   The binder comprises a carbohydrate component and a cellulose ether,

   The content of the carbohydrate component is 10.5 ~ 20.8% by weight relative to the total weight of the fish farming feed,

   The viscosity of the cellulose ether is 60,000 ~ 280,000cps when measured at 20 ℃ and 3 ~ 6rpm conditions using a Brookfield (LV) viscometer based on an aqueous solution of 2.0% by weight concentration,

   The content of the cellulose ether is 1.0 ~ 10.5% by weight of the carbohydrate component, the production method of fish culture feed, characterized in that.
8. The method of claim 7, wherein

   Forming the feed formulation is a method for producing a fish feed for fish characterized in that it is carried out using any one selected from an extruder, an impeller mixer and a kneader.
9. The method of claim 7, wherein

   After the molding step of the feed formulation is completed, the method for producing a fish cultured feed, characterized in that it further comprises the step of drying.