JP3004118U - Bag for deodorizing and coloring of cooked rice - Google Patents

Abstract

(57) [Summary] [Structure] A crushed drifting charcoal with an average diameter of 5 mm or less and a particle size exceeding the maximum particle size that can pass through a bag made of a material such as Japanese paper that allows water to pass through but does not allow carbon powder to pass through. And / or a bag for preventing deodorization and coloring of cooked rice, which contains an adsorbent containing crushed charcoal. [Effect] Excludes the offensive odor of foreign rice and prevents discoloration of the rice after the passage of time.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a bag used for preventing deodorization and coloration of cooked rice by putting it in water on top of polished rice in a rice cooker or a pot used for cooking rice.

[0002]

[Prior art]

 As a method for treating drinking water, that is, tap water, a water treatment facility has been developed and used as a system for supplying safe water that does not impair health. The water treatment method that has been widely used in Japan and is still the standard in Japan today is to remove suspended substances mainly from clear water by coagulating sedimentation with a coagulating sedimentation agent such as aluminum sulfate and sand filtration. It is removed and disinfected with chlorine.

However, today, in particular, in addition to safe water, there is an increasing demand for “delicious water” in addition to the extremely serious pollution of tap water sources in the suburbs of cities. However, it has become difficult to supply "safe and tasty water" by the conventional standard treatment method, and moreover, so-called "advanced treatment" is performed, not only for suspended components but also for dissolved components. "Water treatment" has come to be performed.

The original purpose of advanced water treatment is to remove dissolved pollutants mainly of organic substances, and it is a well-known fact that activated carbon adsorption is extremely effective for this purpose. Although there are various usages, activated carbon adsorption is introduced as one unit operation in most advanced water treatment processes.

This advanced water treatment treatment attempts to remove odorous substances, such as eutrophied lakes and dam lakes, which cause an unpleasant musty odor even at extremely low concentrations. It is a metabolite of plankton and algae that have propagated in large quantities in the water source of. One is trihalomethane, which is a general term for organohalogen compounds that are produced when a portion of organic substances contained in raw water react with chlorine when chlorine is added to raw water for disinfection. This is a substance with a potential risk to human health (liver injury and carcinogenicity), and WHO and USEPA, and in Japan, the Ministry of Health and Welfare will reduce the water quality of tap water to 100 ppb or less on an average yearly basis. Has been established.

[0006] As a water treatment system, powdered activated carbon may be injected as an emergency measure in an emergency such as when the concentration of an odor substance or a trihalomethane precursor temporarily increases in the summer. This is put into a landing well, etc. After contacting with the water to be treated to adsorb and remove the target substance to be removed, it is collected and discarded in the steps of coagulation sedimentation and filtration. That is, the use of powdered activated carbon is a disposable use. However, activated carbon is expensive, so it is limited to emergency first aid.

[0007] These are water treatments at water purification plants, but tap water is often used for flushing toilets, household cleaning, cooling water, and water sprinkling, so all of them should be treated uniformly at advanced levels. Is obviously not economical.

Therefore, various types of household water purifiers that sell advanced tap water only when they are actually used as drinking water are sold on the faucet of each household. These are mainly composed of a combination of a hollow fiber membrane filter having fine pores (a supermicro filter of 0.1 to 0.01 µ) and granular activated carbon. The consumable filter cartridge and activated carbon are replaced every four to five months, but the problem is that bacteria, odor-causing organic substances, iron rust, and pipe dirt are accumulated in the container. And all the drinking water comes out through it. Due to the cost and effort involved in replacement, the replacement period tends to be long. Granular activated carbon for tap water is used for these, and the price is also high. Japanese Utility Model Publication No. 49-37402 proposes a water purifying agent packaging bag in which a mixture of granular activated carbon and granular calcium carbonate is housed in a filtration packaging bag and sealed, and an optional hanging string is provided. . According to this, tap water can be treated with a new adsorbent for each drinking, but the price of granular activated carbon for tap water is expensive.

[0009] The above is merely concerned with the advanced water treatment of water itself. Recently, with the import of Thai rice and foreign rice, the odor of cooked rice has become a problem. For domestic rice, if the period such as stockpiling becomes long, odor may be emitted due to mold or other causes. In addition, even if these cooked rice is white when cooked, it turns yellow with the passage of time, which is a problem.

[0010] These problems occur even if the water that has been subjected to advanced water treatment, that is, distilled water is used for cooking to the extreme, it is not caused by water but caused by rice. It is.

In order to solve this problem, it is known that a solid charcoal lump such as Bincho charcoal should be thoroughly washed with water and added to cooked rice to cook the rice. Bincho charcoal is used because it is hard charcoal itself, and it prevents charcoal powder from being generated during rice cooking to turn the rice black. Since the number of times it can be used is limited, the Bincho charcoal itself is expensive and naturally expensive, and it is necessary to wash it well with water in advance to wash away the fine charcoal powder, which is troublesome.

[0012]

[Problems to be solved by the device]

 The purpose of the present invention is not to treat water with water, but to add crushed drifting charcoal or crushed charcoal enclosed in a wrapping bag such as Japanese paper at the time of rice cooking, at low cost and without trouble. , A disposable bag for preventing deodorization and coloring of cooked rice.

As a result of various studies to achieve the above-mentioned object, the inventor of the present invention has a hint to tea bags such as black tea, and crushes charcoal or ordinary charcoal so that it is inexpensive to dispose in a paper bag. The inventors have found that the problem can be solved by storing and encapsulating crushed drifting charcoal, which has a much higher adsorption force than charcoal, and cooking this together with polished rice, and completed the present invention.

That is, the present invention is as follows. (1) Crushed drift charcoal and / or crushed charcoal having an average diameter of 5 mm or less and a particle size exceeding the maximum particle size that can pass through the material in a bag made of a material such as Japanese paper that allows water to pass through but does not allow carbon powder to pass through. A bag to prevent deodorization and coloring of cooked rice.

(2) Deodorization of cooked rice in which an adsorbent mainly composed of crushed drift charcoal having an average diameter of 0.3 to 4 mm is placed in a bag made of a material such as Japanese paper that allows water to pass through but does not allow carbon powder to pass through. , A color-prevention bag.

The present invention is a material such as Japanese paper or cloth that does not elute even when immersed in hot water that is usually used for tea bags such as black tea, and has strength such that it does not pass carbon fine powder. Crushed drift charcoal and / or crushed charcoal is stored in a bag made from the materials we have and sealed so that the contents do not come out even when boiled. Since crushed charcoal has the property of adsorbing various odorous gases from the air, it is desirable to store it in a hermetically sealed state during storage, transportation, etc., from manufacture to use.

Drift charcoal is charcoal obtained by steam-burning a driftwood of a large tree that flows into a dam for hydroelectric power generation or a river flowing into the dam by the same means as a normal charcoal product while restricting the air flow. . When this drift charcoal was exposed to running water for a long time, resin acids and the like inside the fibers flowed out, and when the charcoal vinegar obtained when converting this to charcoal was examined, raw wood was used as a raw material like normal charcoal. In this case, the tar content is settled down, but in the case of driftwood charcoal, this tar content is hardly recognized.

Table 1 shows analytical values and physical and chemical characteristics of the driftwood charcoal, raw charcoal and commercial charcoal. It is clear that the water absorption rate is significantly higher than that of raw charcoal and commercial charcoal, the apparent specific gravity is about half, and the porosity is significantly higher. However, ordinary charcoal also has large water absorption and porosity as shown in Table 1 and is excellent in adsorbing harmful organic substances, odorous substances, etc., so it is of course possible to use it. . As shown in Table 2, these properties vary considerably depending on the tree species, and it is important to select the tree species according to the target organic matter.

[0019]

[Table 1]

When the driftwood charcoal is observed with a microscope, pores of various sizes from large pores to small pores are recognized, although it varies slightly depending on the type of tree. When the removal of dissolved organic matter by granular activated carbon is examined, the magnitude relationship between coconut shell activated carbon and coal activated carbon is opposite to that of trihalomethane removal. In other words, small amounts of organic chlorine compounds such as trihalomethanes are adsorbed by a mechanism that fills small pores, so activated carbon with smaller pores has a larger adsorption capacity. On the other hand, most of the other dissolved organic substances have a relatively large molecular weight as compared with trihalomethane, and they cannot be adsorbed in the small pores where trihalomethane is adsorbed (molecular sieving action) and are adsorbed in relatively large pores. It is thought to be done.

[0021] Table 2 shows adsorption capacities of dissolved substances having a relatively small molecular weight in comparison with activated carbon for water supply for each resin and driftwood producing area. Kimco is an activated carbon for gas adsorption of American Drug Corporation (A.D.C.), which was set as 100 as a control and indicated by an index for this.

[0022]

[Table 2]

As is clear from Table 2, activated carbon for waterworks with a large number of fine pores is advantageous for dissolved substances having a relatively small molecular weight. Activated carbon is especially advantageous in terms of water supply chlorine adsorption capacity. It is advantageous to mix activated carbon as a measure against dissolved substances having such a small molecular weight, but it is of course much more expensive than driftwood charcoal, so it is optimal to use it partly. However, since dissolved chlorine can be greatly reduced by boiling, when using boiling water such as cooked rice, it is also cost effective to use a bag made of driftwood charcoal or ordinary charcoal. It is advantageous.

Since the treatment bag of the present invention is made of combustible materials such as paper and cloth and charcoal, not only can it be treated as combustible waste, but even if it is disposed of in the soil, moisture in the soil will be lost. It can be used as a soil conditioner that retains gas, so there is no problem in terms of environmental protection. It goes without saying that the treatment bag of the present invention is a single-use, disposable item.

[0025]

【Example】

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) In a bag (bag) made of Japanese paper of 15 cm x 12 cm shown in Fig. 1, 10.0 g of cedar drift charcoal produced by Nahanri was crushed to an average particle size of 2 mm was enclosed. 360 cm ³ of Thai rice was cut off, an appropriate amount of tap water was added, and a bag containing the crushed drifting charcoal shown in Fig. 1 was placed in the rice water to cook rice. When this bag was not included, the cooked rice had an odor characteristic of Thai rice, but when the bag was included, no odor was felt. When the rice was not put in the bag and the rice was left for 2 days, yellow discoloration was observed, but the rice cooked in the bag did not show yellowing at all.

Example 2 10.0 g of cypress driftwood charcoal from Ikehara was crushed to an average particle size of 3.5 mm in a 15 cm × 12 cm Japanese paper bag shown in FIG. 1, and normal charcoal was averaged. 5.0 g of what was crushed to a particle size of 4.0 mm was enclosed. 540 cm ³ of Thai rice was cut off, an appropriate amount of water treated with a domestic water purifier was put, and a bag containing the mixture of the above-mentioned crushed drifting charcoal and crushed charcoal was placed in the water of rice to cook rice. Without this bag, the cooked rice had an odor characteristic of Thai rice, but when the bag was cooked, no odor was felt. When the rice was left without the bag for 2 days, a yellow discoloration was observed, but the rice cooked with the bag did not show this yellowing at all.

Example 3 In an 8 cm × 6 cm Japanese paper bag shown in FIG. 1, 6.5 g of crushed raw charcoal having an average particle size of 1.0 mm was enclosed. 180 cm ³ of Thai rice was cut off, an appropriate amount of water treated with a domestic water purifier was added, and a bag in which the above crushed charcoal was enclosed was added to the rice water to cook rice. Without this bag, the cooked rice had an odor characteristic of Thai rice, but when the bag was cooked, no odor was felt. When the rice was left without bag for 1 and a half days, yellow discoloration was observed, but the rice cooked with the bag was not yellowed at all.

[0028]

[Effect of device]

 With the disposable, deodorizing and coloring prevention bag of the present invention, the odor of cooked rice can be extremely reduced by simply putting the bag containing crushed drifting charcoal and / or crushed charcoal in the boiled water of the polished rice in the rice cooker. It can be reduced, and even if this rice is left to stand for 1 to 2 days, the color change such as yellowing can be made extremely slight. In addition, it is disposable and extremely inexpensive as compared with the case of using granular activated carbon, the bag after use can be burnt, and it can function as a soil conditioner even if it is buried in the soil.

[Brief description of drawings]

FIG. 1 is a perspective view of a bag in which crushed drift charcoal is sealed in a bag made of Japanese paper.

[Explanation of symbols]

 1 Crushed Drift Charcoal (in the bag) 2 Washi Bag 3 Sealing part to prevent Crushed Drift Charcoal from coming out

Claims (2)

[Scope of utility model registration request] 1. A bag made of a material, such as Japanese paper, that allows water to pass through but does not allow carbon powder to pass through, and a crushed drifting charcoal having an average diameter of 5 mm or less and having a particle size exceeding the maximum particle size that allows the material to pass therethrough, and / or
Or a bag for preventing deodorization and coloring of cooked rice, which contains an adsorbent containing crushed charcoal. 2. Deodorization and coloring of cooked rice in which an adsorbent containing crushed drift charcoal having an average diameter of 0.3 to 4 mm is placed in a bag made of a material such as Japanese paper that allows water to pass through but does not pass carbon powder. Prevention bag.