TW202042825A - Method for regulating the color of seaweed - Google Patents

Abstract

The invention relates to a method for regulating the color of seaweed. Mainly to regulate the environment of algae growth, such as sunshine, water temperature, nutrients, etc., so that seaweed changes its color during the growth process, making it gradually yellow. Thus, by the method of the present invention, a large amount of yellow seaweed can be stably cultured to solve the deficiencies of the prior art.

Description

Cultivation method for regulating the color of seaweed

The present invention relates to a method for cultivating seaweed, in particular to a method for cultivating seaweed color.

According to, seaweeds are algae substances that grow in the sea, mainly including red algae, brown algae, and green algae. Because algae are rich in nutrients, they are very helpful for human health. For example, brown algae contain alginic acid and iodine contained in algae. Elements can prevent hyperthyroidism, and eicosapentaenoic acid contained in algae is a highly unsaturated fatty acid, so it has the effect of preventing thrombosis.

In addition, alginic acid in the internal substances of seaweeds has a wide range of uses. It is easy to form gels with cations, such as sodium alginate. It is also known as seaweed, algin or algin, which has the function of quickly absorbing water. It is often used as a dehydrating agent or sizing agent in papermaking and textile; in the food industry, it is used as an emulsifier or thickener; in the pharmaceutical industry, it is used as a tablet binder because of its high viscosity.

Since alginic acid and sodium alginate have the above advantages, the patents currently announced by the Smart Office are mostly related to or applied preparation methods of alginic acid and sodium alginate. For example, Taiwan Patent Certificate No. I626955 "Alginic Acid Containing Metal Crystals" Monomer production method”, I583446 “Preparation method and use of seaweed gum coated chitosan adsorption particles”, I506096 “Seaweed gum-coated straw powder composition and its preparation method”, I503131 “Seaweed polysaccharide body mask And its manufacturing method". However, most of the patents disclosed above are related to the extraction of alginic acid and sodium alginate, or the extraction technology of collagen. There is still no relevant technical literature that has further research results on the cultivation and discoloration of seaweed.

In summary, most of the aforementioned patents focus on revealing related applications and preparations of the substances contained in seaweeds. No one has been found to have patents related to the color of seaweeds, and the role of seaweeds is not limited to the aforementioned, but also has aesthetic, ornamental and other purposes. , Especially when seaweed is added to the dish, the colorful color can increase the beauty of cooking and serving, and also increase appetite. In view of this, the inventor believes that there should be a method to control the discoloration of seaweeds, such as changing the seaweed from red to yellow, so as to enrich the color diversity of seaweeds.

In view of the deficiencies described in the prior art, the creator of the present invention proposes a solution, which relates to a cultivation method for regulating the color of seaweed, including the following steps:

(a) Put the seaweed into a culture tank filled with water. The water in the culture tank is maintained at 18°C-26°C. (b) Inject air into the water continuously or intermittently for 13 to 24 hours a day, with an air volume of 0.01 to 0.4 vvm, and provide light to illuminate the seaweed. (c) When the seaweed turns yellow, take the seaweed out of the culture tank.

The present invention mainly stops the supply of nutrients (such as nutrients, nitrogen, and phosphorus) and controls the growth of seaweeds at appropriate temperature, sunshine, and air volume, which can effectively make the seaweeds gradually turn into yellow during the growth process, especially red seaweeds. The invention can be used to make it yellow, so that sufficient yellow seaweed can be provided through large-scale cultivation, thereby improving the shortcomings of the prior art.

The following is a further explanation of the advantages, features, requirements, and specific implementation aspects of the invention with the aid of the illustrations. The creation of this invention is about, including:

The present invention relates to a culture method for regulating the color of seaweed, and the method provided in this specification includes two main steps. Step one is a method of cultivating seaweed, which can provide sufficient amount of seaweed, and step two is a method of cultivating seaweed to change color. It can effectively make the seaweed start to change color and appear yellow during the growth process.

Please refer to the first picture. The following first introduces the seaweed cultivation method of step 1. The steps include:

S1: Take the seaweed with a wet weight of 3~10 kg/m ² and put it into a culture tank with water. The water in the culture tank is maintained at 18℃-26℃. Among them, the temperature of the water can be controlled by a temperature control system, or the heat exchange wastewater can be used to control the temperature. Since the natural gas plant will absorb a large amount of seawater for heat exchange in order to change the ultra-low temperature liquefied natural gas (LNG) from liquid to gaseous state, the waste water after heat exchange is called LNG cold drainage, because the temperature of LNG cold drainage is mostly medium The temperature is between 14°C and 26°C, so the heat exchange wastewater referred to in this specification preferably refers to LNG cold drainage, and the temperature is maintained by replacing the LNG cold drainage. In addition, in addition to LNG cold drainage, thermal drainage from power plants can also be used. For example, in actual operation, depending on the seasonal temperature difference, the temperature is lower in winter, and it is better to use thermal drainage from power plants for cultivation; The temperature is higher, it is better to use LNG cold drainage for cultivation.

S2: Add nutrients to the culture tank at least two days a week. Through this step, the nutrients needed by the seaweed during the growth process can be provided, and the nutrients in the nutrient salt preferably include 1~8 mg/L nitrogen and 0.1~0.8 mg/L phosphorus to provide the seaweed growth The main nutrients. Moreover, generally speaking, the time for seaweed to absorb the nutrients in the nutrient salt mostly falls at night. In order for the seaweed to fully absorb the nutrient salt, the time for adding the nutrient salt is preferably between 3 pm and 6 pm between. In addition, in order to match the nutrient addition time, the replacement time of the heat exchange wastewater in the culture tank also needs to be adjusted in the same way. Taking this manual as an example, the replacement time of the heat exchange wastewater is before 3 pm, and depends on the season. There are also different deployment times. For example, the replacement time in summer is preferably from 8:00 to 15:00, while in winter it is from 10:00 to 13:00. And when replacing, it can be adjusted according to the temperature in the culture tank, and you can choose to replace all the heat exchange wastewater, or replace only a small part of it. In addition, in order for the seaweed to have sufficient light for photosynthesis, the light irradiation time is at least 10 hours a day, and the light can be obtained by sunlight or through fluorescent lamps (sunlight or plant lighting).

S3: Inject air into the heat exchange wastewater continuously or intermittently for 13 to 24 hours a day, and clean the culture tank regularly or irregularly. When the seaweed grows, in addition to the proper water temperature and an environment with sufficient nutrients, it also needs sufficient carbon dioxide, so air must be added to the heat exchange wastewater. In addition, the air volume of the air is preferably 0.01 to 0.4 vvm, and the air contains 0.04% to 30% CO ₂ to provide a gas volume suitable for algae growth. In addition, the process of injecting air can be continuous or intermittent. The continuous method is to continuously inject air to the LNG cold drainage within 13 to 24 hours a day, and the intermittent method is to continuously inject air for 1 hour and then stop for 1 hour. Inject air, and continue to inject air within 1 hour, and so on, continue to circulate until the aforementioned 13~24 hours are met, and then stop. Moreover, the time mentioned in the intermittent type is only an example and can be adjusted according to needs, for example, 2 hours Inject air continuously into the inside, then stop injecting air for 1 hour, continue to inject air for 2 hours, and so on. In addition, in order to keep the culture tank clean, it is better to clean the culture tank every 1 to 3 weeks. The above steps S2 to S3 are not a continuous step flow, but the steps can be changed according to needs.

The following is the introduction to the cultivation method of step 2 seaweed discoloration: S4: After 1 to 3 weeks from the beginning of step S1, replace the heat exchange wastewater in the culture tank, and then stop adding the nutrient. Since the key to making the seaweed start to change color to form a yellow color is the nutrient salt, it is better to replace all the heat exchange wastewater in the culture tank in this step, and then stop adding the nutrient salt, so that the seaweed will be free of the nutrient salt. It starts to grow in the environment, and then begins to change color. Especially through the method of the present invention, the red seaweed can gradually become yellow.

S5: Inject air into the water continuously or intermittently for 13~24 hours a day, the air volume of the air is 0.01~0.4 vvm, and light is provided to irradiate the seaweed, while the temperature in the culture tank is maintained between 18℃-26℃ . As mentioned above, the main factor for the discoloration of the seaweed is whether there are nutrients and other growth conditions must be kept fixed. Therefore, the difference between the growth conditions of step 2 and step 1 is the addition of nutrients. In step S5, the air preferably contains 0.04%-30% CO ₂ . Moreover, in order for the seaweed to have sufficient light for photosynthesis, the light irradiation time is at least 10 hours a day, and the light can be obtained by sunlight or through sunlight. Similarly, the culture tank must be cleaned every 1 to 3 weeks to keep the tank clean. As mentioned in step 1, maintaining the temperature in the culture tank in step 2 can be achieved through a temperature control system, or by replacing heat treatment wastewater, preferably by regularly replacing the heat exchange wastewater in the culture tank to maintain the culture The temperature in the tank, and when the heat exchange wastewater is replaced, all the heat exchange wastewater in the culture tank can be replaced, or only a small part can be replaced.

S6: When the seaweed turns yellow, take the seaweed out of the culture tank. Repeat the operation according to the step S5, and you will find that the seaweed begins to change color, from red seaweed to yellow seaweed. At this time, the seaweed can be taken out of the culture tank.

In summary, through the method provided by the present invention, the seaweed can be stabilized to turn yellow to overcome the shortcomings described in the prior art, so that people with ordinary knowledge in the technical field of the present invention can be sure that the present invention can stably obtain yellow seaweed , The following are the results obtained by the method provided by the present invention under various conditions.

Example 1: The cultivation volume is 2 tons, the wet weight is 6.7~7.5 kg/m ² , and the nutrient salt is added 3 times a week. The nutrient salt includes 7~8 mg/L nitrogen and 0.7~0.8 mg/L Phosphorus, and stop changing the water in the afternoon on the day of addition, and start the water change action until 9:30 the next morning, and the water change amount is 0.6 to 1.2 tons/hour. Wet weight is measured weekly, the average harvested wet weight is 8.6~9.6 kg/m ² , and the average production wet weight per week is 1.2~2.1 kg/m ² , please refer to appendix 1, you can find sea fungus with high yield and color Consistent. Average initial wet weight (kg/m ² ) Average harvested wet weight (kg/m ² ) Weekly average production wet weight (kg/m ² ) the first week 6.7 8.6 1.9 the second week 7.5 9.3 1.7 The third week 7.5 9.3 1.8 the fourth week 7.5 8.7 1.2 fifth week 7.5 9.6 2.1

Example 2: The cultivation volume is 2 tons, the wet weight is 5.9~5.5 kg/m ² , and the nutrient salt is added 4 times a week. The nutrient salt includes 3~4 mg/L nitrogen and 0.3~0.4 mg/L Phosphorus, and stop changing the water in the afternoon on the day of addition, and start the water change action until 9:30 the next morning, and the water change amount is 0.6 to 1.2 tons/hour. The wet weight is measured every 2 weeks, the average harvested wet weight is 10.5~11.2 kg/m ² , and the weekly average production wet weight is 2.25~2.5 kg/m ² , please refer to appendix 2 for the production status every two weeks. Average initial wet weight (kg/m ² ) Average harvested wet weight (kg/m ² ) Average weekly production wet weight (kg/m ² ) the second week 6.5 11.2 2.34 the fourth week 5.9 10.9 2.50 Sixth week 6.0 10.5 2.25 Eighth week 6.5 11.2 2.35

Example 3: The cultivation volume is 2 tons, the wet weight is 3.0~4.1 kg/m ² , no nutrients are added, and the LNG cold drainage is replaced 7~17 times a day, and the water exchange rate is 0.6~1.2 tons/hour. We measure the wet weight weekly, the average harvested wet weight reaches 3.3~4.1 kg/m ² , and the average yield is 0.3~1.1 kg/m ² wet weight. Please refer to appendix 3, you can find that the color of sea fungus gradually changes from red yellow. Average initial wet weight (kg/m ² ) Average harvested wet weight (kg/m ² ) Average weekly production wet weight (kg/m ² ) the first week 3.0 4.1 1.1 the second week 4.1 4.8 0.7 The third week 3.0 3.3 0.3 the fourth week 3.3 3.7 0.4 fifth week 3.5 3.8 0.3

In summary, this case meets the requirements set by the Patent Law, and a patent application was filed in accordance with the law. The above description only lists the preferred embodiments of the invention. The scope of rights in this case is still mainly listed in the claims.

S1~S7: steps

The first figure is a flow chart of the steps of the present invention

Claims (10)

A cultivation method for regulating the color of seaweed, including the following steps: (a) Put the seaweed into a culture tank filled with water, and the water in the culture tank is maintained at 18℃-26℃; (b) Inject air into the water continuously or intermittently for 13 to 24 hours a day, with an air volume of 0.01 to 0.4 vvm, and provide light to illuminate the seaweed; (c) When the seaweed turns yellow, take the seaweed out of the culture tank. For example, the cultivation method for adjusting the color of seaweed as described in item 1 of the scope of patent application, wherein the water is heat exchange wastewater, and in step (b): regularly replace the heat exchange wastewater in the culture tank. For example, the cultivation method for adjusting the color of seaweed as described in item 1 or item 2 of the scope of patent application, wherein a step (d) is added between step (b) and step (c): washing the culture every to three weeks Pool. As described in item 3 of the scope of patent application, the cultivation method for adjusting the color of seaweed, wherein the step (b): the air contains 0.04%-30% CO ₂ . As described in item 4 of the scope of patent application, the cultivation method for adjusting the color of seaweed, wherein the step (b): the light irradiation time is at least 10 hours per day. As described in item 5 of the scope of patent application, the amount of the seaweed in step (a) is 3~10 kg/m ² wet weight; it is changed between step (a) and step (b) Add a step (e), step (f), and step (g) in sequence. This step (e): add nutrients to the culture tank at least two days a week, and the nutrients include 1~8 mg/L Nitrogen and 0.1~0.8 mg/L phosphorus; this step (f): continuously or intermittently inject air into the heat exchange wastewater for 13~24 hours a day, the air volume of the air is 0.01~0.4 vvm; this step (g ): After one to three weeks from the execution date of this step (a), replace the heat exchange wastewater in the culture tank and stop adding the nutrient salt. As described in item 6 of the scope of patent application, the cultivation method for adjusting the color of seaweed, wherein in step (e): regularly replacing the heat exchange wastewater in the cultivation tank. For example, in the cultivation method for adjusting the color of seaweed as described in item 7 of the scope of patent application, a step (h) is added between step (f) and step (g): cleaning the culture tank every one to three weeks. As described in item 8 of the scope of patent application, the cultivation method for adjusting the color of seaweed, wherein the step (f): the air contains 0.04%-30% CO ₂ . For example, the cultivation method for adjusting the color of seaweed as described in item 9 of the scope of patent application, wherein in step (e), the heat exchange wastewater in the cultivation tank is regularly replaced before 3 pm, and regularly added from 3 pm to 6 pm The nutrient salt.

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