KR102351279B1 - A deodorant composition comprising used coffee grounds and sanitary article comprising the same - Google Patents

Abstract

The deodorizing composition according to the present invention uses coffee grounds that are discarded after brewing coffee, so that the manufacturing cost is low, and it is environmentally friendly and has excellent adsorption performance, deodorization performance and shape stability.
As the deodorizing composition according to the present invention has the above advantages, it is useful in various fields, such as baby diapers, adult diapers, women's sanitary napkins, wound bands, filtration media, around ginkgo trees in autumn, odor removal in barns or wastewater treatment plants can be used

Description

A deodorant composition comprising coffee grounds and a sanitary product comprising the same

The present invention relates to a deodorizing composition containing coffee grounds and a hygiene product comprising the same, and more particularly, to a deodorizing composition containing coffee grounds and having excellent adsorption performance, deodorization performance and shape stability while being environmentally friendly, including coffee grounds, and hygiene products including the same it's about

Charcoal is generally used as a deodorizing and dehumidifying agent, but charcoal has excellent moisture absorption and absorption power, so it can be used semi-permanently.

On the other hand, coffee is a tropical plant and is an agricultural product that is produced year-round, so it has the advantage of abundant raw materials and smooth supply.

Coffee contains water, caffeine, crude protein, ether extract, crude fat, sugar, crude fiber, ash, etc. as general ingredients, and organic acids, which are volatile components, are also present.

Aroma, an important factor that determines the quality of coffee, comes from volatile organic acids. Although green coffee beans have no flavor, when they are heated under certain conditions, physicochemical changes, that is, Maillard reaction (reaction caused by amino acids and reducing sugars) inside the beans This results in the characteristic coffee aroma.

The size of the Korean coffee market in 2017 is about 11 trillion won, and the demand is continuously increasing according to changes in tastes and eating habits.

Most of these coffees are discarded in the form of coffee grounds after use, and some of them are used as deodorants or for animal feed.

However, there is a problem that the demand for recycled products using coffee grounds is still insignificant, and the frequency of use is low due to the complicated processing process.

Korea Patent Publication No. 10-2015-0028029 (March 13, 2015)

The present invention was devised to solve the above problems, and using coffee grounds discarded after brewing coffee, a deodorizing composition comprising the same, which is inexpensive and eco-friendly at the same time, has excellent adsorption performance, deodorization performance and shape stability The purpose is to provide hygiene products.

The present invention relates to a deodorizing composition and a hygiene product comprising the same.

The present invention relates to a deodorizing composition comprising coffee grounds, wherein the coffee grounds have a surface potential of -50 to -20 mV, a porosity of 20 m ² /g or more, and a moisture content of 8% by weight or less. It relates to a deodorizing composition comprising a.

In one embodiment of the present invention, the coffee grounds include: a) washing the coffee grounds remaining after extracting the coffee beans; b) drying the washed coffee grounds; and c) aging the dried coffee grounds.

In one embodiment of the present invention, the coffee grounds include: a) washing the coffee grounds remaining after extracting the coffee beans; b) hydrothermal treatment of the washed coffee grounds with water; c) drying the hot water treated coffee grounds; and d) aging the dried coffee grounds.

In one embodiment of the present invention, the deodorizing composition further comprises one or more fillers selected from alumina, diatomaceous earth, kaolin, clay and zeolite, and 1 to 10 parts by weight of the filler with respect to 100 parts by weight of the coffee grounds. characterized.

The present invention also relates to a hygiene product comprising said deodorizing composition.

In one embodiment of the present invention, the hygiene product is a sanitary napkin used to remove odors generated from menstrual blood.

The deodorizing composition according to the present invention uses coffee grounds (coffee by-products) that are discarded after brewing coffee, so that the manufacturing cost is low and environment-friendly, and at the same time, it has excellent deodorization performance, adsorption performance and shape stability.

As the deodorizing composition according to the present invention has the above advantages, it is useful in various fields such as baby diapers, adult diapers, women's sanitary napkins, wound bands, filtration media, around ginkgo trees in autumn, odor removal in barns or wastewater treatment plants can be used

In particular, menstrual blood decays over time and creates a bad odor such as an amine, so a material with a negative charge on the surface is required to effectively catch it. It can be effectively adsorbed and deodorized, and by recycling coffee grounds that are thrown away as waste, it is economical and also reduces the psychological burden felt by consumers, so it can be applied to remove the odor of sanitary napkins.

1 illustrates an adsorption mechanism of coffee grounds according to an aspect of the present invention.
Figure 2 shows the surface potential according to the extraction time of the coffee grounds prepared through the embodiment.
Figure 3 shows the surface potential according to the extraction temperature of the coffee grounds prepared through the embodiment.

Since the present invention is capable of making various changes and having various embodiments, specific embodiments will be illustrated and described in the detailed description. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention. In describing the present invention, if it is determined that a detailed description of a related known technology may obscure the gist of the present invention, the detailed description thereof will be omitted.

Terms including an ordinal number such as 1st, 2nd, etc. may be used to describe various components, but the components are not limited by these terms. These terms are used only for the purpose of distinguishing one component from another.

When a component is referred to as 'connected' or 'connected' to another component, it may be directly connected or connected to the other component, but other components may exist in between. It should be understood that there is On the other hand, when it is mentioned that a certain element is 'directly connected' or 'directly connected' to another element, it should be understood that there is no other element present in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as 'comprising' or 'having' are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

While the inventor of the present invention was repeating intensive research to develop a component that rapidly adsorbs and deodorizes body secretions and odor components such as amines and sulfides, coffee grounds (coffee by-products) have specific surface potential, particle size, porosity and It was found that, when it has a water content, it rapidly adsorbs human exudates and odor components such as amines and sulfides. Also, when the obtained coffee grounds are re-extracted or reprocessed with a solvent (water, alcohol, etc.), such as amines and sulfides The present invention was completed by discovering that it more rapidly adsorbs human secretions and odor components.

The deodorizing composition according to the present invention is made of coffee grounds as a base, and the coffee grounds have a surface potential of -50 to -20 mV, a porosity of 20 m ² /g or more, and a moisture content of 8% by weight or less. .

In this case, the coffee grounds include: a) extracting coffee beans and washing the remaining coffee grounds; b) drying the washed coffee grounds; and c) aging the dried coffee grounds.

The coffee is a seed part of a red fruit called coffee cherry derived from a coffee tree, and can be basically divided into Arabica coffee and Robusta coffee. There are some varieties that do not belong to the above varieties, but most are coffee beans derived from the above varieties. In the present invention, any type of coffee bean may be used regardless of the type of coffee.

The coffee can be applied in the form of a powder (pulverized product), and is selected from the group consisting of washed and dried coffee beans, fermentation-dried beans, heat-treated beans, steam-dried beans, freeze-dried beans, and combinations thereof Any one or plural may be applied.

The coffee beans may be used that have undergone a washing and sterilization process to remove foreign substances that may remain on the surface before extracting the coffee liquid. Beans that have been processed such as grinding, fermentation, heat treatment, steam treatment, freeze-drying, etc. may be applied so that the useful components of the coffee beans can be sufficiently effective in sanitary products or under wet conditions.

The coffee grounds (coffee by-products) refer to residues remaining after coffee beans have been extracted, and specifically refers to by-products remaining after extracting a coffee extract from ground coffee beans using a coffee machine or other distillation device. The coffee grounds contain tocopherol, which is a fat-soluble antioxidant that cannot be extracted by water.

Step a) is a step of washing the coffee grounds remaining after extracting the coffee beans, and may be washed with water or compressed air with foreign substances remaining in the coffee grounds.

Step b) is a step of drying the washed coffee grounds, and the obtained coffee grounds may be dried at 60 to 150° C. for 1 to 10 hours. In this case, the drying method is not limited, and sterilization may be performed after drying.

It is preferable to sterilize coffee grounds by UV light in a sterilizer for 1 to 5 hours and then heat sterilize them in an oven at 100 to 150° C. for 1 to 3 hours to completely remove the remaining solvent while maintaining the pore structure with negative charges.

Step c) is a step of aging the dried coffee grounds, and the dried coffee grounds may be aged at 10 to 60° C. for 1 to 10 days. Through the aging process, morphological stability such as the pore structure and morphology of coffee grounds can be improved, and the formed surface potential, porosity, moisture content, etc. can be stably maintained.

The aging step is a first step of aging the obtained coffee grounds at 10 ~ 30 ℃ 1 ~ 5 days; And it may include a second step of aging 1 to 5 days at 40 ~ 60 ℃.

By performing the aging step in two steps, the shape stability of the coffee grounds can be maximized.

The coffee grounds have a surface potential of -50 to -20 mV, a porosity of 20 m ² /g or more, a moisture content of 8% by weight or less, and a particle diameter of 0.2 to 0.5 mm.

The coffee grounds preferably have a surface potential of -50 to -20mV, and more preferably a surface potential of -50 to -30mV. When the surface potential is less than -50 mV, the coffee grounds particles become smaller and morphology and shape stability are lowered.

If the porosity is ^{less than 20 m 2} /g, the adsorption properties of coffee grounds may be deteriorated, and if the moisture content exceeds 8 wt%, the deodorizing properties of the coffee grounds may be deteriorated due to the moisture adsorbed in the pores.

The particle diameter of coffee grounds is preferably 0.2 to 0.5 mm. If the particle diameter is less than 0.2 mm, it is difficult to pack with a non-woven fabric, etc. due to poor processability and handleability.

In addition, the coffee grounds may include: a) extracting coffee beans and washing the remaining coffee grounds; b) hydrothermal treatment of the washed coffee grounds with water; c) drying the hot water treated coffee grounds; and d) aging the dried coffee grounds.

Step a) is a step of washing the coffee grounds remaining after extracting the coffee beans, and may be washed with water or compressed air with foreign substances remaining in the coffee grounds.

Step b) is a step of hydrothermal treatment of the washed coffee grounds with water. Through the hydrothermal treatment, active ingredients such as caffeine present in pores of the coffee grounds can be further removed.

As shown in FIG. 1 , since the surface potential of the active ingredient present in the pores of the coffee grounds has a positive value in the solid state, the pores from which the active ingredient is removed by extraction have a negative charge, which is a relative charge. Therefore, positively charged compounds such as amines or sulfides can chemically adsorb hydrogen bonds and ionic bonds to negatively charged pores, so that the adsorption and deodorization properties of coffee grounds can be improved.

That is, by re-extracting the obtained coffee grounds, it is possible to additionally remove positively charged compounds present in the pores, and through this, the coffee grounds exhibit stronger negatively charged properties, thereby improving the deodorizing properties of the coffee grounds.

In this case, it is preferable that the hydrothermal treatment proceeds while stirring at 60 to 90° C. for 15 to 55 seconds. When the temperature and time satisfy the above numerical ranges, active ingredients such as caffeine can be effectively removed, and the deodorizing properties of the obtained coffee grounds can be improved.

Step c) is a step of drying the hot water-treated coffee grounds, and the obtained coffee grounds may be dried at 60 to 150° C. for 1 to 10 hours. In this case, the drying method is not limited, and sterilization may be performed after drying.

It is preferable to sterilize coffee grounds by UV light in a sterilizer for 1 to 5 hours and then heat sterilize them in an oven at 100 to 150° C. for 1 to 3 hours to completely remove the remaining solvent while maintaining the pore structure with negative charges.

Step d) is a step of aging the dried coffee grounds, and the dried coffee grounds may be aged at 10 to 60° C. for 1 to 10 days. Through the aging process, morphological stability such as the pore structure and morphology of coffee grounds can be improved, and the formed surface potential, porosity, moisture content, etc. can be stably maintained.

The aging step is a first step of aging the obtained coffee grounds at 10 ~ 30 ℃ 1 ~ 5 days; And it may include a second step of aging 1 to 5 days at 40 ~ 60 ℃.

By performing the aging step in two steps, the shape stability of the coffee grounds can be maximized.

In addition, the deodorizing composition is an additive comprising an organic acid, a thickener, an adhesive, an oil and a flavoring agent; and one or more fillers selected from potassium silicate, sodium silicate, alumina, diatomaceous earth, kaolin, clay and zeolite.

The deodorizing composition preferably includes 1 to 10 parts by weight of an additive and 1 to 10 parts by weight of a filler based on 100 parts by weight of coffee grounds.

The organic acid is a deodorizing component for removing bad odors, and may add functions of sterilization and odor removal.

As the organic acid, at least one selected from citric acid, malic acid, succinic acid, tartaric acid, sorbic acid, ascorbic acid, lactic acid, acetic acid and gluconic acid may be used.

The thickener is intended to increase adhesion and shape stability, and it is preferable to use a natural substance with little irritation to the skin.

As the thickener, coco-betaine, disodium laureth sulfosuccinate, olive surfactant, apple surfactant, potassium cocoyl glycinate (PCG), etc. A viscous surfactant is preferred.

The adhesive is added to improve the adhesive properties of the deodorizing composition, and may include a gelatin adhesive.

As the gelatin adhesive, it is preferable to use a gelatin material obtained by hydrolysis, concentrated in a vacuum, dissolved and diluted, and the adhesive strength is supplemented by adding dibasic sodium phosphate and calcium carbonate. In this case, if necessary, it is okay to add more carbohydrates such as maltose to supplement the initial adhesive strength.

The oil is to improve the fluidity of the composition and prevent oxidation, vegetable oil, palm oil, cocoa oil, corn oil, soybean oil, sunflower seed oil, safflower oil, rapeseed oil, cottonseed oil, olive oil, sesame oil or a combination thereof may include

The flavoring agent is for offsetting odors generated from human secretions, and it is preferable to include spices such as vanilla extract.

The additive is preferably used in an amount of 1 to 10 parts by weight based on 100 parts by weight of coffee grounds, and the deodorizing properties of the composition can be maximized within the numerical range. In this case, the content ratio of the organic acid, thickener, adhesive, oil and flavoring agent included in the additive is not limited, and may have various content ratios depending on the intended use.

The filler itself has pores, so it can trap amines or sulfides that cause odor, and can improve mechanical properties, adhesion, abrasion resistance, and the like of the composition.

The alumina, diatomaceous earth, kaolin, clay and zeolite can improve the abrasion resistance of the composition and at the same time induce the adsorption of harmful components, and the potassium silicate and sodium silicate improve the impact resistance, elasticity and flexibility of the composition when mixed, and the temperature change in physical properties can be prevented.

The surface potential of the alumina, diatomaceous earth, kaolin, clay and zeolite is preferably -50 ~ -20mV.

The filler is preferably used in an amount of 1 to 10 parts by weight based on 100 parts by weight of coffee grounds, and when the filler is less than 1 part by weight, the effect of the addition is insignificant, and when it exceeds 10 parts by weight, the deodorizing properties may be reduced.

The deodorizing composition may be powdered by drying after mixing the coffee grounds, additives, fillers, and the like. At this time, for uniform mixing, the content of the thickener is increased to form pellets, dried to solidify, and pulverized to form a powder.

In addition, the deodorizing composition may further include a silane coupling agent to improve adhesion properties with other substrates.

The deodorizing composition may be powdered and filled in a nonwoven fabric, etc. In this case, the composition inserted into the nonwoven fabric may be gathered in one place according to the movement of the human body, etc. or may be agglomerated by surrounding moisture. This not only gives a bad fit to the wearer of the product, but also reduces the specific surface area as the composition is agglomerated, thereby rapidly reducing the adsorption properties and deodorization properties.

The composition may be attached to the surface of a substrate, such as a fiber, using an adhesive, but in this case, the adhesive may block the pores of the coffee grounds, resulting in rather reduced adsorption properties.

In the present invention, by adding a silane coupling agent to the deodorizing composition to solve this problem, the silane coupling agent is introduced to the surface of the coffee grounds to improve the adhesion properties with other substrates without clogging the pores of the coffee grounds, thereby improving the adhesion properties within the nonwoven fabric. It is possible to prevent the inserted composition from moving to one place according to the movement of the human body, or from being agglomerated by surrounding moisture.

The silane coupling agent is beta-3,4-epoxycyclohexylethyltrimethoxysilane, gamma-glycidoxypropyltrimethoxysilane, gamma-methacryloxypropyltrimethoxysilane, gamma-aminopropyltrimethoxy Epoxy group-containing silane coupling agents, such as silane, vinyl trimethoxysilane, and vinyl triethoxysilane, amino group-containing silane coupling agents, vinyl group-containing silane coupling agents, etc. can be used.

The silane coupling agent is preferably used in an amount of 1 to 5 parts by weight based on 100 parts by weight of coffee grounds.

In addition, the deodorizing composition may further include a coordinating anion, and the coordinating anion induces to have a highly dispersed negative charge throughout the composition, thereby better trapping positively charged compounds such as amines or sulfides. When mixed with the silane coupling agent, a kind of chemical net is formed to suppress unnecessary movement and aggregation of the composition.

The coordinating anion is p-toluenesulfonate (C ₇ H ₈ SO ₃ ^- ), sulfate (SO ₄ ^2- ), nitrate (NO ₃ ^- ), triflate (CF ₃ SO ₃ ^- ), fluorosulfate, Perfluorosulfonate (R _f SO ₃ ^- ; R _f is C1-C4 perfluoroalkyl), perfluorosulfonimide ((R _f ) ₂ NSO ₂ ^- ; R _f is C1-C4 perfluoroalkyl roalkyl), hexafluorosilicate (SiF ₆ ^{2 -} ), hexafluorotitanate (TiF ₆ ^2- ), tetrafluoroborate (BF ₄ ^- ), hexafluorophosphate (PF ₆ ^- ), hexafluoro antimonate (SbF ₆ ⁻ ), perfluoroalkylaluminate ((R _f O) ₄ Al ⁻ ; R _f is perfluoroalkyl), and the like.

The coordinating anion is preferably used in an amount of 0.1 to 1 part by weight based on 100 parts by weight of the coffee grounds, and if it is less than 0.1 part by weight, the effect of addition is insignificant, and if it exceeds 1 part by weight, processability is reduced due to excessive increase in the anion can be

The deodorizing composition may be filled in a nonwoven fabric such as a tea bag, molded in a sheet form, or attached to the surface of a substrate, and may be manufactured by inserting the thus prepared nonwoven fabric, sheet or substrate into a hygiene product.

In this case, the hygiene product may include sanitary napkins, absorbent sanitary pads such as diapers, wound bands, and filtration media, and these products may further include other components, for example, adhesives, release layers, and wrapping paper. is of course

In particular, menstrual blood decays over time and generates odors such as amines and sulfides, so a material having a negative charge on the surface is required to effectively catch it. It can effectively adsorb and deodorize sanitary napkins, and by recycling coffee grounds that are thrown away as waste, it is economical and also reduces the psychological burden felt by consumers, so it can be applied to remove odors from sanitary napkins.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the following Examples and Comparative Examples are only examples for explaining the present invention in more detail, and the present invention is not limited to the following Examples and Comparative Examples.

(surface potential)

Measurements were made with a DT-1200 apparatus (manufactured by Dispersion Technology Inc.) using the CVI method.

(Qigongdo)

The specific surface area of the coffee grounds was measured by BET three-point measurement.

(Ammonia removal rate)

A deodorizing composition was put into a reaction tube (diameter 10 cm, length 50 cm) maintained at 130° C., and helium gas containing 400 ppm ammonia was passed through. After measuring the concentration of ammonia by installing an analyzer capable of measuring the concentration of ammonia at the inlet and outlet of the reactor, the removal rate was calculated by Equation 1 below.

[Equation 1]

Ammonia removal rate (%) = (inlet NH ₃ concentration - outlet NH ₃ concentration) / (inlet NH ₃ concentration) × 100 (%)

(Sulphide Removal Rate)

A deodorizing composition was put into a reaction tube (diameter 10 cm, length 50 cm) maintained at 130° C., and helium gas containing 600 ppm of sulfur dioxide was passed through. After measuring the concentration of sulfur oxide by installing an analyzer at the inlet and outlet of the reactor, the removal rate was calculated by Equation 2 below.

[Equation 2]

Sulfide removal rate (%) = (inlet SO ₂ concentration - outlet SO ₂ concentration) / (inlet SO ₂ concentration) × 100 (%)

(Example 1)

After extracting the coffee beans and washing the remaining coffee grounds with water, it was dried at 80° C. for 2 hours.

The dried coffee grounds were aged at 20° C. for 2 days to obtain coffee grounds.

The obtained coffee grounds had a surface potential of -39 mV, a porosity of 25 m ² /g, a moisture content of 6% by weight, and a particle size of 0.3 mm.

(Examples 2 to 7)

After extracting the coffee beans and washing the remaining coffee grounds with water, the washed coffee grounds were hydrothermally treated with water. At this time, the hot water treatment was performed while mixing 500 g of coffee grounds and 3,000 g of purified water and stirring at 70° C. for a certain period of time.

After the hot water-treated coffee grounds were subjected to solid-liquid separation through filtration, the separated coffee grounds were dried at 80° C. for 2 hours, and then the dried coffee grounds were aged at 20° C. for 2 days to obtain coffee grounds.

At this time, coffee grounds were obtained by varying the hot water treatment time, which was obtained in Example 2 (treatment time 10 seconds), Example 3 (treatment time 20 seconds), Example 4 (treatment time 30 seconds), Example 5 (treatment time) 40 seconds), Example 6 (treatment time 50 seconds), and Example 7 (treatment time 60 seconds), and the surface potential of the obtained coffee grounds was measured and shown in FIG. 2 .

As shown in FIG. 2, the hot water treatment time of coffee grounds is preferably 15 to 55 seconds. As the hot water extraction time increases, the pore structure of coffee grounds particles collapses, and negatively charged molecules are also extracted with caffeine, so that the surface potential is rather reduced. it can be seen that

At this time, it can be seen that the coffee grounds of Examples 3 to 7 have a surface potential of -50 to -20 mV, and the coffee grounds of Examples 3 to 6 have a surface potential of -50 to -30 mV.

(Examples 8 to 12)

After the coffee beans were extracted and the remaining coffee grounds were washed with water, the washed coffee grounds were hydrothermally treated with water. At this time, the hot water treatment was performed while mixing 500 g of coffee grounds and 3,000 g of purified water and stirring at a constant temperature for 30 seconds.

After the hot water-treated coffee grounds were subjected to solid-liquid separation through filtration, the separated coffee grounds were dried at 80° C. for 2 hours, and then the dried coffee grounds were aged at 20° C. for 2 days to obtain coffee grounds.

At this time, coffee grounds were obtained by varying the hydrothermal treatment temperature, which was obtained in Example 8 (treatment temperature 60° C.), Example 9 (treatment temperature 70° C.), Example 10 (treatment temperature 80° C.), Example 11 (treatment temperature) 90° C.) and Example 12 (treatment temperature 100° C.), and the surface potential of the obtained coffee grounds was measured and shown in FIG. 3 .

As shown in Figure 3, the hot water treatment temperature of coffee grounds is preferably 60 ~ 90 ° C. As the hot water extraction temperature increases, the pore structure of coffee grounds particles collapses, and molecules with negative charges are also extracted with caffeine, so that the surface potential is rather It can be seen that a decrease

At this time, it can be seen that the coffee grounds of Examples 8 to 11 have a surface potential of -50 to -20 mV.

(Example 13)

Organic acid (malic acid), thickener (disodium laurethsulfosuccinate), adhesive (gel-type gelatin adhesive), oil (cocoa oil) and flavoring agent (vanilla extract) were mixed in 100 parts by weight of coffee grounds obtained in Example 4 5 parts by weight of one additive and 5 parts by weight of a filler mixed with potassium silicate and diatomaceous earth were placed in a stirrer and stirred to obtain a deodorizing composition.

(Example 14)

To 100 parts by weight of the coffee grounds obtained in Example 4, _{0.5 parts by weight of p-toluenesulfonate (C 7} H ₈ SO ₃ ^- ) was placed in a stirrer and stirred to obtain a deodorizing composition.

(Comparative Example 1)

Coffee grounds were obtained in the same manner as in Example 1, except that the aging step was not used.

(Comparative Example 2)

Coffee grounds were obtained in the same manner as in Example 4, except that the aging step was not used.

(Comparative Example 3)

Coffee grounds were obtained in the same manner as in Example 9, except that the aging step was not used.

Example comparative example One 2 4 7 9 12 13 14 One 2 3 surface potential
(mV) -39 -13 -46 -24 -47 -21 - - -27 -19 -22 Qigongdo
(m ² /g) 25 18 31 21 37 16 - - 18 15 20 moisture content
(weight%) 6 12 5 15 4 10 - - 14 16 11 Ammonia Removal Rate (%) 86.3 78.5 88.4 79.6 87.2 75.7 87.5 99.1 70.7 69.1 72.1 Sulfide Removal Rate (%) 86.2 78.6 86.9 80.6 86.6 77.1 88.1 99.0 72.8 68.4 70.2

From the results of Table 1, the coffee grounds of Examples 1, 4, 9, 13 and 14 had a surface potential of -50 to -20 mV, a porosity of 20 m ² /g or more, and a moisture content of 8% by weight or less. It can be seen that, due to this, it can be confirmed that the deodorizing property is excellent.

On the other hand, it can be seen that Comparative Examples 1 to 3 were inferior in the above-mentioned properties to those of Examples.

Claims (8)

a) extracting coffee beans and washing the remaining coffee grounds;
b) hydrothermal treatment of the washed coffee grounds with water;
c) drying the hot water treated coffee grounds;
d) sterilizing the dried coffee grounds; and
In the method for producing coffee grounds for deodorization comprising; e) aging the sterilized coffee grounds,
The hydrothermal treatment of step b) is carried out at 60-90° C. for 15-55 seconds,
In step c), the hot water-treated coffee grounds are dried at 60 to 150° C. for 1 to 10 hours,
In step d), the dried coffee grounds are sterilized by UV light for 1 to 5 hours, and then heat sterilized at 100 to 150° C. for 1 to 3 hours,
The aged coffee grounds have a surface potential of -50 to -20 mV, a porosity of 20 m ² /g or more, and a moisture content of 8 wt% or less.
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