KR20010069628A - Instant tea made with bamboo charcoal - Google Patents

Abstract

PURPOSE: A method for preparing tea powder using charcoal is provided, which has an effect to adsorb heavy metals and flow out useful minerals. CONSTITUTION: A method for preparing tea powder using charcoal is characterized by mixing the powdered charcoal 10-30% of 1-2mm size of bamboo or black oak trees and existing tea powders such as green tea, black tea, the fruit tea of the Chinese matrimony vine, Cassia tora L. tea, or barley tea, and then packing in tea bags.

Description

Tea bag with charcoal {Instant tea made with bamboo charcoal}

The present invention relates to the production of tea bags using charcoal, and more specifically, to improve the quality of water by the heavy metal adsorption effect of charcoal and the dissolution effect of useful minerals contained in charcoal and to develop a product suitable for consumer's taste. B. Making oak charcoal powder, and mixing them with green tea, black tea, gojija tea, gyeongjaja tea, and barley tea, respectively, are related to the development and manufacture of products packed in tea bags.

Recently, as the use of charcoal and wood vinegar has increased rapidly, the use of soil improvers and pest control for agriculture, livestock feed, food additives, etc. has been expanding day by day. In particular, the use of charcoal is not only for a wide range of agricultural uses, but also for the use of livestock feed. Porous chars usually have an inner surface area of about 300 square meters per gram, so that many useful minerals are eluted and have a good absorption effect of heavy metals.

Charcoal has been used for the purpose of eliminating odors in the manufacture of soy sauce, branching agents, water purification around the wells, and pollution prevention. It is widely used as an adsorbent refiner (activated carbon). In the food field, it is widely used to purify the soju using charcoal adsorption and desorption properties, to purify liquid food, to decolorize, and to purify food water.

Charcoal is charcoal when bamboo or oak is carbonized at 1,000 ℃ ～ 1,300 ℃, and it becomes white charcoal with a clear sound when its cross section is glossy. Since ancient times, it has been used to make soy sauce using this adsorption power, and has been eaten as a branch. Powdered charcoal has different adsorption and desorption effect depending on material and particle size, and it is used for agriculture, animal feed, food, and medicine according to the degree and quality of sanitary treatment. .

On the other hand, green tea and black tea is commercialized by making instant single-use tea bags for easy use, and there are also corn tea and barley tea for drinking water. When drinking them, the taste of tea is very different depending on the quality of the water, and trace amounts of harmful substances and chlorine smell in the water reduce the palatability of people, so the adsorption effect of these substances using charcoal porosity and the usefulness of charcoal are useful. Since the quality change of drinking water is expected due to the elution effect of minerals, in the present invention, the selection of charcoal material, the size of charcoal powder particles, the adsorption and desorption effect of charcoal, and a suitable product for manufacturing tea bag tea using charcoal based on scientific research. To develop the optimal charcoal tea bag tea products by performing the form and sensory test.

The present invention is roughly divided into the manufacture and development of charcoal tea bag products through the adsorption of heavy metals according to the type and particle size of the charcoal and mineral dissolution of the charcoal.

Bamboo Charcoal, Oak Charcoal. The moisture content, ash content, and mineral content of the mixed wood charcoal were examined (Table 1). The ash content was the highest in the commercial activated carbon used as a control, 7.57%, bamboo charcoal was 4.61%, oak charcoal 2.05%, and mixed wood charcoal 1.39. % Net. As a result of examining useful mineral content in ash, the overall content of bamboo charcoal was the highest and the control ash with the highest ash content was the lowest.

As a result of observing the surface structure and porosity of charcoal using electron microscope, numerous cross-sectional porous micropores were observed in the cross section of all charcoal, and it was judged that bamboo charcoal had higher porosity per unit area than other charcoal.

In order to select a suitable particle size of charcoal tea bag charcoal stirred at a constant speed under the set conditions (water amount 300ml, 80 ℃, 10 minutes), filtered and then justified to 300ml and compared the inorganic elution results (Table 2) As the particle size of charcoal decreased, the surface area of the charcoal increased, which increased the amount of minerals eluted. Therefore, the charcoal powder of 1mm ~ 2mm size was selected in consideration of the drawback of fine powder coming out during tea bag manufacturing.

In order to compare the amount of inorganic elution of charcoal tea bags according to the charcoal materials, put charcoal tea bags of 1mm ~ 2mm size in deionized distilled water 300ml, stir at constant speed for 10 minutes at 80 ℃, filter them, and settle to 300ml. Table 3 The highest available mineral elution was bamboo charcoal tea bags.

In order to investigate the adsorption capacity of heavy metals on charcoal, 1.5 g of charcoal was added to 300 ml of Cu (NO ₃ ) ₂ , Pb (NO ₃ ) ₂ , and Cd (NO ₃ ) ₂ mixed solution. As a result of analyzing the heavy metal content by atomic absorption spectrophotometer (Figure 1), 38% of cadmium, 95% of lead, and 77% of copper were removed.

In the above experiments, the charcoal materials were good in order of bamboo and oak, and the size of charcoal particles was 1mm ~ 2mm, which is suitable for making tea bags with a large surface area.

According to the amount of bamboo charcoal (1mm ~ 2mm) added (0, 10, 20, 30%), green tea, barley tea, and unleavened tea tea bags were leached in boiling water for 10 minutes. In order to evaluate the sensory characteristics such as taste, taste and overall taste by the 9-point grading method, the sensory test on the mixed green tea prepared at the proper blending ratio and commercial teabag green tea (100% green tea) (Table 4) showed the appearance of 10%. The addition group showed good evaluation with significant difference, and the taste did not show any significant difference, but the 30% addition group was slightly higher. The odor showed a significant difference, and the 10% added and the control were higher, and the overall acceptability was the best.

In addition, as a result of sensory evaluation of mixed barley tea and commercial teabag barley tea (100% barley tea) prepared at the appropriate blending ratio, the control group showed a good difference with all the evaluation items, and the 20% additive was the most suitable. In Esau, the 20% addition was slightly higher in taste and overall preference.

Therefore, it was selected to add 10-20% of bamboo charcoal 1mm ~ 2mm size powder to the existing tea bag tea products.

It is a product developed according to the improvement of water quality by the heavy metal adsorption effect of charcoal and the elution effect of useful mineral contained in charcoal and consumer's taste. Each product was mixed and developed in a tea bag. As shown in the results of this experiment, porous charcoal has an internal surface area of about 300 square meters per gram, so that many useful minerals are eluted and the heavy metal adsorption effect is excellent. Among the three charcoal used in the experiment, the most useful minerals are eluted, and the addition of 1-2mm bamboo charcoal with excellent heavy metal adsorption effect removes heavy metals and odors and increases the useful minerals. It is the effect of the invention to develop the conditions for producing a tea bag product of improved quality than green tea, barley tea, clarity tea.

Claims (2)

Technology for manufacturing 1.5-2g single-use tea bag and 5-10g household drinking water refined charcoal tea bag using bamboo or oak charcoal 1-2mm size powder. 10-30% of bamboo or oak charcoal powder 10-30% is mixed with the existing tea bags, green tea, black tea, gojija tea, gyeoljaja tea and barley tea, respectively.