JP2843522B2 - Deodorant composition - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorant composition, and more particularly to a human waste treatment plant, a sewage treatment plant, a paper mill,
Wastewater and sludge generated in food factories, livestock farms, etc.
It is useful for processing garbage and manure.

[0002]

2. Description of the Related Art In deodorizing treatment of this kind, a method using a strong oxidizing agent such as hypochlorites, chlorites, chlorine dioxide, and hydrogen peroxide is known. However, when these compounds are used to remove malodors generated from objects containing high concentrations of organic substances, they can react with malodorous substances in an early stage to eliminate unpleasant odors, but these oxidizing agents that are highly reactive Reacts with non-odorous substances,
There was a drawback that the deodorizing action did not last for a long time.

For example, Japanese Patent Publication No. 63-58640 discloses an invention in which sludge is brought into contact with alkali metal or alkaline earth metal chlorite as a method for deodorizing the sludge. When performing continuous deodorization treatment in a system in which bad odors are continuously generated due to the metabolic activity of, it is necessary to frequently administer the drug. Japanese Patent Application Laid-Open No. Hei 4-126597 discloses a means for solving such a problem, which is to remove deodorized sludge cake with a bacteriostatic agent such as a thiazolone compound, a thiamine compound, a carbamic acid compound, etc. A method using a combination of agents has been proposed. However, if the oxidizing agent and the bacteriostatic agent are previously blended, the storage stability is poor, and it is necessary to handle them individually, which makes the use extremely complicated, and the bacteriostatic agent is expensive and therefore difficult to be put to practical use. Met.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to remove odors generated from objects containing high concentrations of organic substances.
An object of the present invention is to provide a deodorizing agent which is simple and inexpensive, and whose effect lasts for a long time.

[0005]

The present inventors have paid attention to the use of a combination of a fast-acting compound and a slow-acting compound in order to achieve the intended purpose. A test using hypochlorites and chlorates, which were considered to be dangerous, was found to have a deodorizing effect when they were mixed at a predetermined ratio in a system where water was present. They have found that they last for a long time, and have completed the present invention.

[0006] That is, the deodorant composition of the present invention comprises an aqueous solution containing hypochlorites and chlorates as essential components and having a weight ratio of 1 to 15:45 to 5 by weight. A typical composition is 1-15% by weight of hypochlorites, 4
It consists of an aqueous solution containing 5 to 5% by weight.

The hypochlorites used in the practice of the present invention include alkali metal salts such as sodium hypochlorite and alkaline earth metal salts such as calcium hypochlorite. Depending on the type of the compound, the odor eliminating effect is not promptly exhibited when the amount is less than the predetermined amount, and the effect does not change even if it is used more than necessary. Examples of the chlorates include alkali metal salts such as sodium chlorate and alkaline earth metal salts such as calcium chlorate. These are indispensable for maintaining the deodorizing effect for a long period of time. However, if the added amount is too large, the blending stability of the composition is undesirably reduced. Although the amount of water used varies somewhat depending on the type of compound used, the amount required to form a uniform system is necessary. When the amount of water is increased, the container is bulky and the efficiency of storage, transportation and the like is lowered, which is not preferable.

Further, the present inventors have studied means for increasing the blending stability while maintaining the deodorizing performance of the composition, and have found that inorganic salts may be interposed in these compositions. That is, hypochlorites and chlorates are contained as active ingredients, and the weight ratio of both is 1 to 15:45.
It was confirmed that when the inorganic salts were dissolved in the aqueous solution having a ratio of 5, the deodorizing performance was excellent and even when the concentration was high, it could be used safely.

The inorganic salts usable in the practice of the present invention include chlorides such as sodium, potassium, magnesium, calcium and aluminum, sulfates, monohydrogensulfate, carbonates, monohydrogencarbonates, hydroxides, and the like. Phosphates,
Monohydrogen phosphate, dihydrogen phosphate, pyrophosphate, metaphosphate, tripolyphosphate, hexametaphosphate, borate, etc., of which representatives are sodium chloride, sodium sulfate And neutral alkali metal salts. When these inorganic salts are added to the composition, the greater the amount, the more the blending stability is improved. In the practice of the present invention, if a basic substance such as sodium hydroxide is added to the composition and the pH of the system is adjusted to 12 or more, the blending stability is further improved.

[0010] The method of using the deodorant composition of the present invention is not particularly limited, but it is desirable to perform stirring, turning back, etc., after adding to the substance to be treated. When treating the dewatered sludge cake, it should be added to the excess concentrated sludge before dewatering. The amount added to the substance to be treated varies depending on the amount of malodorous components and malodors generated from the target depending on conditions such as the type of organic matter, the amount of organic matter, the type of microorganisms, and the amount of microorganisms.

[0011]

According to the present invention, in a deodorizing test in which the effective chlorine addition concentration is uniformed as described below, both the quick action and the sustainability are higher than when hypochlorites or chlorates as the composition are used alone. The effect was confirmed. Although the detailed mechanism of this synergistic effect must be studied in the future, it is necessary to add the composition used in the present invention to a substance containing a high concentration of an organic substance in a state of being close to the molecular level to achieve redox. Improves the quick-acting ability by apparently increasing the potential difference from that of hypochlorite ion, and improves the sustainability by using the total oxidizing power of the added deodorant only for reaction with malodorous substances It is presumed.

[0012]

The present invention will be described below in detail with reference to examples and comparative examples. The numerical units in these tests are shown by weight ratio. (Example 1) 50 g of a commercially available 13% aqueous sodium hypochlorite solution (containing by-product sodium chloride) and 43%
50 g of an aqueous solution of sodium chlorate was mixed to prepare a deodorant composition comprising 6.5% of sodium hypochlorite, 21.5% of sodium chlorate, and 72% of water. On the other hand, surplus sludge collected at the sewage treatment plant (pH: 4.5, sludge concentration: 25000 mg / l, organic matter concentration: 18000)
mg / l). Next, 100 ml of the sludge specimen was taken in a glass container, and the deodorant composition 50 m was added thereto.
g (available chlorine amount: 25 mg) and sealed.
The container was left at a temperature of 5 ° C., and the components and concentration of the malodorous substance generated in the container were periodically measured. The results of the test are as shown in Table 1. The composition immediately showed a deodorizing effect, and was completely deodorized after 5 days, and the state continued until at least 10 days. did.

Example 2 45 g of a 13% aqueous sodium hypochlorite solution and 43% aqueous sodium chlorite solution 4
5 g and 10 g of sodium chloride were mixed, and 5.85% of sodium hypochlorite and 19.35% of sodium chlorate were mixed.
%, 10% sodium chloride, and 64.8% water. Then, 100 ml of sludge specimen
Deodorant composition 56mg (effective chlorine amount 25mg)
Was added, and the deodorizing effect of the composition was examined in the same manner as in Example 1. As shown in Table 1, the same results as in Example 1 were obtained.

(Comparative Example 1) In Example 1, a similar test was performed without adding a deodorant to a sludge sample, and the generation of malodorous substances was examined. The test results were as shown in Table 1.

Comparative Example 2 In Example 1, 200 mg of a commercially available 13% sodium hypochlorite aqueous solution alone (effective chlorine amount 25 m
g) was added, and the deodorizing effect of the composition was examined in the same manner as in Example 1. As shown in Table 1, excellent effects were initially shown, but at the time when 5 days had elapsed. Gradually became ineffective.

(Comparative Example 3) In Example 1, 28.6 mg of an aqueous solution of 43% sodium chlorate alone (effective chlorine amount: 25 mg) was added as a deodorant to 100 ml of a sludge specimen. The deodorizing effect was examined. As shown in the results of the test, as shown in Table 1, no immediate deodorizing effect was observed, but a remarkable effect was observed after 5 days.

(Comparative Example 4) In Example 1, 63 mg of an aqueous solution of 25% sodium chlorite alone (effective chlorine amount: 25 mg) was added as a deodorant to 100 ml of a sludge specimen. And its deodorizing effect was examined. As shown in Table 1, the results of the test showed that the deodorizing effect was persistent, but no satisfactory effect was obtained at any stage.

Comparative Example 5 In Example 1, 63 mg of a 25% aqueous sodium chlorite solution (effective chlorine amount: 25 mg) was added as a deodorant to 100 ml of a sludge specimen, and 20 mg of copper sulfate was further added. The deodorizing effect was examined in the same manner as in Example 1. As shown in Table 1, as shown in Table 1, a remarkable effect was observed after 5 days, but it was not found to be satisfactory at the initial stage and after 10 days.

(Comparative Example 6) In Example 1, 63 mg of 25% aqueous sodium chlorite solution (effective chlorine amount 25 mg) was added as a deodorant to 100 ml of sludge specimen, and 20 mg of copper dithiocarbamate was further added. The deodorizing effect was examined in the same manner as in Example 1. As shown in Table 1, as shown in Table 1, a remarkable effect was observed after 5 days, but it was not always satisfactory at the initial stage and after 10 days.

[0020]

[Table 1]

Example 3 15 g of a commercially available 13% aqueous sodium hypochlorite solution and a 43% aqueous sodium chlorite solution 3
By mixing 0 g and 5 g of sodium chloride, a deodorant composition comprising 3.9% of sodium hypochlorite, 25.8% of sodium chlorate, 10% of sodium chloride and 60.3% of water was prepared. Next, this was placed in a drier at 60 ° C. and dried. After sufficiently dried in a desiccator, the mixture was pulverized in an agate bowl to prepare a sample of the present invention. On the other hand, for comparison, sodium chloride was removed from the deodorant composition, that is, 15 g of a commercially available aqueous sodium hypochlorite solution.
And a 30% aqueous solution of sodium chlorate having a concentration of 43% were mixed, dried in a drier at 60 ° C., dried sufficiently in a desiccator, and then pulverized in an agate bowl to prepare a comparative sample. Test to determine the sensitivity to first-class hazardous materials in Japan, a drop ball impact sensitivity test (indirect impact method), a 50% explosion probability and 100%
The condition of explosion probability was measured.

As a result, the height of the 50% explosion probability of the comparative sample was 2.46 cm, and the height of the 100% explosion probability was 8.
As a result of measuring the explosion probability of the sample of the present invention at these heights, it was 0% at any height. By adding sodium chloride, it was composed of sodium hypochlorite and sodium chlorate. It was confirmed that the blending stability of the mixture was improved.

[0023]

Industrial Applicability The deodorant composition of the present invention has a rapid effect and a long-lasting effect on the removal of offensive odors generated from substances containing high concentrations of organic substances such as wastewater, sludge, garbage, and manure. However, the effect on use is great, for example, it is simple and the handling is safe.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-195960 (JP, A) JP-A-54-142171 (JP, A) JP-A-1-119256 (JP, A) JP-A 52-142 123399 (JP, A) JP-A-50-115172 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) A61L 9/01 C02F 11/00

Claims (2)

(57) [Claims] 1. An aqueous solution containing hypochlorites and chlorates as active ingredients, wherein the weight ratio of both is from 1 to 1.
5: A deodorant composition characterized by having a ratio of 45 to 5. 2. An inorganic salt is dissolved in an aqueous solution containing hypochlorites and chlorates as active ingredients and having a weight ratio of 1 to 15:45 to 5 in both. Deodorant composition.