KR101351463B1 - Drying method for brown algae - Google Patents

Abstract

The present invention relates to a drying method for brown algae and, more specifically, to a drying method for brown algae which comprises the following steps: a first step for collecting non-edible portions of the brown algae and washing the non-edible portions of the brown algae; a second step for finely cutting the washed non-edible portions of the brown algae; a third step for freezing the cut non-edible portions of the brown algae; and a fourth step of dehydrating the non-edible portions of the brown algae by dipping the frozen non-edible portions of the brown algae in water at 15-45°C, or spraying the water at 15-45°C to the surface of the non-edible portions of the brown algae. Through drying the brown algae using the present invention, a user can dry the brown algae with low costs in short time without changes in components, prevent the contamination of marine environment, and apply the dried brown algae for producing food additives and functional feed.

Description

Drying method for brown algae}

The present invention relates to a brown algae drying method. Specifically, a method of drying the non-edible part of brown algae by immersing or spraying in low temperature water and drying, and relates to a brown algae drying method for drying at low cost without changing the components of brown algae drying.

The seaweed industry has recently emerged as a blue ocean industry due to the growing demand for well-being foods, international demand, seed industry, new material industrialization such as Fucoidan, and bioenergy development to replace fossil fuels. Globally, seaweed production is 7 million tons per year, of which kelp, seaweed, and seaweed are the majority, and the production is continuously increasing (FAO, Fishstat, Global aquaculture production, 2010).

Brown seaweed such as seaweed and kelp is mainly used as food. Brown algae are rich in alginic acid, a polysaccharide, which inhibits the absorption of cholesterol (keys et al., 1961), absorbs and releases heavy metals, and prevents arteriosclerosis. Fucoidan, an acidic water-soluble polysaccharide, has been shown to have anticoagulant, antitumor anticancer activity, and antioxidant effect. Iodine is involved in mammary gland development and metaphor (Hadley, 1996).

Brown algae, especially seaweed and kelp, are generally grown on ropes by growing seedlings. When harvesting brown algae, only edible leaflets are collected, and non-edible parts such as roots, stems, and spores, and immature individuals and pest-damaged individuals are dumped in the ocean. These speculative non-edible parts are used as food for benthic animals such as octopus and sea cucumbers.However, as the production of brown algae continues to increase, the amount of non-edible parts also increases, depositing on the bottom of the farms, corrupting the tidal flats, and depleting the marine environment. It is caught in fishing gear, and it is disturbed by fishing, and it causes damage to fishing gear, and it causes friction between industries.

However, the brown algae are left unspoiled in the sea, and the abandoned brown algae do not collect even though they cause serious marine pollution. Because it is done at the same time, it is rarely exposed to the outside. In addition, the collection period is limited from February to May and kelp is from May to July, and the amount of non-planted food is collected in large quantities, and it contains 25 to 35% of highly viscous polysaccharides. Difficulties occur, and the tissues are weak and soon decay and become a gel, and thus, there is a problem of economic problems and secondary pollution such as land pollution to be treated by conventional waste treatment methods.

On the other hand, the non-edible part of brown algae contains the same ingredients as the edible part, which makes it valuable for use as a functional livestock feed or feed supplement (key, 1961; Nishino et al., 1999; Yamamoto et al., 1984; Hardley, 1996; Lee, 2005). .

Raw material processing is required to utilize the non-edible portion of brown algae as a functional livestock feed. In this regard, Korean Patent Publication No. 2003-0045579 discloses a functional feed supplement using seaweed waste and a method of manufacturing the same. However, the non-edible part contains alginic acid with high viscosity and the moisture content of the raw material is 89% or more, so that it does not take long drying time and does not sufficiently remove moisture when it is naturally dried. There is a problem that the part is denatured.

Therefore, in the case of the above-described patent, the concept using the seaweed waste and the effect as a feed supplement can be obtained, but there is a problem that commercial production is impossible due to the lack of drying technology.

Accordingly, the present inventors have tried to develop a drying method for the drying of the non-edible portion of brown algae in an efficient and low cost, the result of the present invention.

One object of the present invention is to provide a method for drying at low cost in a short time without changing the composition of brown algae.

Another object of the present invention is to provide dried brown algae produced by the process and its industrial use.

The brown algae drying method according to the present invention provided to achieve the object of the present invention as described above is the first step of collecting the non-edible portion of the brown algae, washing the collected brown algae non-edible portion, and the washed brown algae non-edible portion The second step of cutting, the third step of freezing the fine brown algae non-edible portion, and the dehydrated brown algae non-edible portion is immersed in water of 15 to 45 ℃ or by spraying water of the temperature on the surface of the non-edible portion dehydrated It is characterized by including a fourth step to.

Brown algae (褐藻 類) in the present invention is a kind of edible algae, it is known to have the effects of detoxification, anticancer action, anticoagulant action, thyroid disease prevention.

Such brown algae may be seaweed, kelp, 톳, green vegetable or rhubarb, preferably seaweed or kelp.

In the present invention, the non-edible part includes a root, stem, spores, and the like of brown algae as a part except for a portion which humans eat or cook in nature (this is called a edible part).

However, those skilled in the art can easily apply the present invention to the decorative part, so that the present invention does not necessarily exclude the decorative part.

Referring to the brown algae drying method according to the present invention in detail according to each process as follows.

(1) process for collecting and washing non-edible parts of brown algae

As a process of collecting the non-edible part of brown algae and washing the salt, non-edible parts such as roots, stems, and spores of brown algae may be used, but may include a decorative part of brown algae. The wash water used for washing uses fresh water that does not contain salt. The washing time may vary depending on the contamination and salinity of the brown algae, preferably washing in the range of 1 to 20 minutes, preferably 1 to 10 minutes, more preferably 1 to 5 minutes.

(2) cutting process

The process of slicing the non-planted portion that has been collected and washed to an appropriate size, the slicing is mainly performed using a roller protruding projections, but is not limited to the one to chop the non-edible portion of the brown algae to an appropriate size. The size to be cut is 0.5 to 10 cm, preferably 2 to 5 cm, based on the length.

(3) freezing process

It is a process of freezing the non-edible portion of the fine brown algae. The freezing is carried out in a freezing chamber at which a temperature of 0 ° C. or lower, preferably -1 to -40 ° C., more preferably -1 to -30 ° C. is maintained, but is not limited thereto. The freezing method is, for example, either fast freezing or slow freezing.

(4) dehydration process

It is a process of dehydrating the non-edible part of the frozen brown algae. The dehydration may be carried out by immersing the non-planted portion of the frozen brown algae in water at room temperature for 5 to 30 seconds, preferably 6 to 20 seconds, more preferably 8 to 15 seconds, or at room temperature on the surface of the frozen brown algae. By spraying during this time. Here, the water at room temperature is preferably fresh water. In addition, the water at room temperature is 15 to 45 ℃, preferably 20 to 45 ℃, more preferably 25 to 42 ℃.

(5) additional process

After the freezing process is finished (3) but not necessarily, after the non-planted portion of the frozen brown algae is chopped again, the water can be removed through the (4) dehydration process. The thinning here is performed at a size of 2 cm or less, preferably 0.1 to 2 cm, based on the length of the non-plantable portion.

In addition, after the dehydration process (4), the remaining water may be selectively removed using a dehydrator or a dryer, for example, a continuous dehydrator, a rotary kiln, or the like.

In the case of the additional process described above, water removal can be increased more efficiently.

On the other hand, dried brown algae prepared using the method of the present invention can be used as a health food such as beverages, alcoholic beverages, food by grinding and processing. It can also be used to make functional livestock feed and functional cosmetics by grinding or extracting certain organics.

According to the present invention, the non-edible portion of the brown alga can be efficiently dried at a low cost. In addition, since the high temperature is not used in the drying process, it is possible to prevent the component change of the brown algae to the non-plantable part.

1 is a cross-sectional view of frozen seaweed stem.
Figure 2 is a result of observing the cross-section of wakame stems before and after dehydration using the drying method according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to examples. It is to be understood that these embodiments are provided by way of illustration only, and are not intended to limit the scope of the present invention.

Example 1 Seaweed Stem Collection and Washing

200kg of stems, which were drilled by U-shaped seaweed, were collected from a fish farm on the coast of Doyang-eup, Goheung-gun. The collected wakame stems were washed in running water for 5 minutes, and placed in a basket until the progress of the following example.

Example 2: Seaweed stem cutting

The seaweed stem obtained in Example 1 was cut into a size of 2 to 5 cm in the longitudinal direction using a shredder. These fragmented seaweed stems were divided into 10kg each and proceeded as follows.

On the other hand, in general, the water content of the seaweed is about 80%, the weight of the water was calculated to be 8kg per 10kg seaweed stem (weight of water (kg) = weight of the sample × 0.8).

Example  3: dry seaweed stem

30 kg (3 x 10 kg each) of fine seaweed stems cut in Example 2 were naturally dried at room temperature for 5 days, and the weight was measured using an electronic balance.

Dehydration rate of seaweed stem after natural drying was measured by the experimental formula described in Example 5-3.

Example 4 Seaweed Stem Freezing

90 kg (9 kg in 10 kg) of fine seaweed stems cut in Example 2 were placed in a -15 ± 3 ° C. freezer and frozen for 5 hours. The results are shown in Fig. Specifically, freezing the seaweed stem, the fiber membrane tissue contraction while only pure water is frozen.

Example 5: Seaweed Stem Dewatering

5-1. Dewatering frozen seaweed stems immersed in lukewarm water (fresh water)

In Example 4, 30 kg (3 10 kg each) of frozen seaweed stems were immersed in about 30 seconds of water at room temperature of about 30 seconds. Then, the weight was measured using an electronic balance.

5-2. Dewatering frozen seaweed stalks sprayed with lukewarm water (fresh water)

In Example 4, 30 kg (3 kg each) of frozen seaweed stems were sprayed into water at room temperature of 30 ° C. for about 15 seconds. Then, the weight was measured using an electronic balance.

5-3. Seaweed Stem Dehydration Measurement

The dehydration rate for the seaweed stems of Examples 5-1 and 5-2 was calculated using the following Experimental Formula 1. The results are shown in Table 1.

[Equation 1]

% Dehydration = {(weight of water-weight of sample after dehydration) / (weight of sample-weight of sample after dehydration)} * 100

Example 3 Example 5-1 Example 5-2 Weight (kg) Dehydration Rate (%)  Weight (kg) Dehydration Rate (%) Weight (kg) Dehydration Rate (%) Primary 7.14 30 5.56 55 6 50 Secondary 7.26 27 5.74 53 6.15 48 Third 7.06 32 5.45 56 5.83 52

As shown in Table 1, it was confirmed that the method of dehydration by dipping or spraying frozen wakame stems is effective for water removal.

In addition, as can be seen in Figure 2, when the frozen wakame stems immersed in fresh water within a short time, only the water that was naturally frozen was able to remove a large amount of water.

Example 6: Dehydration Rate Measurement by Additional Dewatering Process

After removing the frozen seaweed stem 30kg (three 10kg each) of Example 4, and then cut again to less than 2cm in length, water was removed in the same manner as in Example 5-1. Then, the weight of the dehydrated seaweed stem was measured using an electronic balance. Dehydration rate was calculated as a percentage using the empirical formula.

Example 6 Weight (kg) Dehydration Rate (%) Primary 3.33 70 Secondary 3.75 68 Third 3.2 72

As shown in Table 2, it was confirmed that the method of dewatering after cutting the frozen wakame stem is effective for water removal.

1: seaweed stalk ice grain cross section
2: cross section before seaweed stem dewatering
3: cross-section after seaweed stem dewatering

Claims (6)

A first step of collecting the non-edible part of the brown algae, washing the collected brown algae non-edible part, a second step of slicing the washed brown algae non-edible part, a third step of freezing the fine brown algae unedible part, And a fourth step of immersing the frozen brown algae non-edible portion with water at 15 to 45 ° C. or spraying dehydrated water by spraying water at the temperature on the surface of the non-edible portion. The method of drying brown algae according to claim 1, further comprising a fifth step of further dehydrating in a dehydrator or a dryer after the fourth step. The method of drying brown algae according to claim 1 or 2, further comprising the step of re-cutting the frozen brown algae unedible portion after the third step and before the fourth step. The method of claim 1, wherein the brown alga is dried seaweed, kelp, 톳, zucchini or rhubarb. The method of claim 1, wherein the non-edible portion of brown algae is selected from the group consisting of roots, stems, and spores of brown algae. The method of claim 1, wherein the dipping or spraying of the fourth step is made for 5 to 30 seconds.

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