JP2579541B2 - Deodorizing composition for night soil - Google Patents

Description

The present invention relates to a deodorizing composition for night soil, and more particularly to a composition containing 2-bromo-2-nitropropane-1,3-diol as an active ingredient. About things.

The deodorizing composition for human waste of the present invention is suitable for deodorizing treatment of toilets such as trains, buses, aircraft, ships, and the like, in which washing water is circulated.

(Prior art)

Conventionally, as a method of removing bad smell generated from night soil,
(1) a sensory deodorization method for masking offensive odors with fragrances and the like, (2) a chemical deodorization method for deodorizing malodorous substances by reacting malodorous substances with chemical deodorants such as glyoxal and ferrous sulfate, (3) A physical deodorization method in which an odor is adsorbed and removed by an adsorbent such as activated carbon, (4) a biological deodorization method in which a malodorous substance is decomposed by microorganisms to make it odorless, and a method combining them are adopted.

On the other hand, a chemical deodorizing method has been adopted for deodorizing the toilets of former Japanese National Railways that use a flush water circulating toilet, and a chlorinating agent such as trichloroisocyanuric acid and a fragrance have been used in combination as a deodorant.

[Problems to be solved by the invention]

The malodorous substance generated from night soil mainly comprises a sulfur compound such as hydrogen sulfide and ammonia. These include those contained in human excreta at the time of excretion and those produced by the decomposition of human excreta by decay of human excreta by microorganisms such as intestinal bacteria contained in human excreta after excretion, and the latter is overwhelmingly more than the former.

In the sensory deodorization method as a method for deodorizing malodors generated from night soil, the masking effect becomes insufficient if the amount of malodors generated is large, and in some cases, the mixed odor with the fragrance gives a discomfort.

In the chemical deodorization method, it is necessary to use a chemical deodorant corresponding to the retention time of human waste, especially when the urine is retained for a long time such as a toilet with a flush water circulation system such as trains, and a large amount of the deodorant is used. Need. Furthermore, when a chlorinating agent is used, the coloring agent cannot be added to the circulating washing water, so that the washing water colored in human urine circulates, giving the user discomfort. Further, when these human wastes are externally treated with activated sludge, the remaining deodorant adversely affects the activated sludge.

In the physical deodorization method, it is necessary to install an adsorption device, and an aromatic agent for masking offensive odor is also adsorbed, so that it cannot be used in combination with a fragrance.

Biological deodorization takes a long time to deodorize, and has little effect at low temperatures.

In the case of flush water toilets such as trains, it is difficult to adopt physical deodorization methods that require specific equipment and biological deodorization methods that require time to deodorize, and sensory deodorization methods and chemical deodorization methods do not use perfume. The amount of the chemical deodorant and the chemical deodorant used is an amount required for masking or neutralizing the malodorous components generated by the decomposition of human waste, and the amount of use is enormous.

An object of the present invention is to provide a deodorizing composition for human urine, which uses a small amount of a drug, can add a fragrance, a coloring agent, and the like, and has a small adverse effect on activated sludge.

[Means for solving the problem]

The present inventors have conducted intensive studies to achieve the above object, and as a result, it has been found that 2-bromo-2-nitropropane-1,3-diol is extremely effective in preventing the decomposition of human waste by putrefaction and activated sludge. The inventors have found that the adverse effects are extremely small, and completed the present invention.

The present invention relates to 2-bromo-2-nitropropane-1,3-
A deodorizing composition for human waste, comprising a diol.

In the present invention, the deodorizing composition for night soil comprises 2-bromo-
It is sufficient that 2-nitropropane-1,3-diol is contained in an effective amount, and usually 2-bromo-2-nitropropane-
1,3-diol, extender, dissolution rate regulator, fragrance,
It is a composition in which additives such as a surfactant, a corrosion inhibitor, and a coloring agent are blended as required, and the dosage form and the like are not particularly limited.

The night soil deodorizing composition of the present invention is used by directly charging an effective amount of 2-bromo-2-nitropropane-1,3-diol corresponding to the amount of retained night soil into a night soil storage tank or a washing water circulation tank.

[Action]

The deodorizing composition for human waste of the present invention is characterized by containing 2-bromo-2-nitropropane-1,3-diol as an active ingredient.

In the present invention, 2-bromo-2-nitropropane-
Since 1,3-diol is a fungicide for intestinal bacteria and microorganisms that cause putrefaction of human waste, it itself is a very good urinary putrefaction inhibitor. Further, in the aqueous solution, a part thereof is decomposed to generate formaldehyde and hydrobromic acid, which effectively acts on deodorization of malodorous substances from night soil. Formaldehyde is a good chemical deodorant for ammonia, hydrogen sulfide and the like, and is particularly effective for removing malodorous substances contained in human waste immediately after excretion. Hydrobromic acid also lowers the pH of human waste fluid, suppresses the decomposition of human waste by putrefaction, and reacts with alkaline malodorous substances such as ammonia to make it odorless.

As described above, 2-bromo-2-nitropropane-
Since the bactericidal action of 1,3-diol itself and the deodorizing action of its hydrolysis products, formaldehyde and hydrobromic acid, act synergistically, it is extremely effective for deodorizing human waste.

〔Example〕

The present invention will be described in more detail with reference to Examples and Comparative Examples.

However, the scope of the present invention is not limited by the following examples.

(1) Deodorizing test of night soil A predetermined amount of each of 2-bromo-2-nitropropane-1,3-diol and various deodorizing agents (glyoxal and ferrous sulfate) as comparative examples was dissolved in 100 ml of water. Into a polyethylene bottle, and add the test solution (stool 1)
+ Urine 5 + water 5 mixed solution) 100 ml and sealed.

The concentrations of ammonia and hydrogen sulfide, which are malodorous substances in the bottle, were measured using a Kitagawa gas detector tube after 1, 24, and 72 hours.

Table 1 shows the deodorizers used and the measurement results of the concentrations of ammonia and hydrogen sulfide.

As shown in Table 1, in Examples using 2-bromo-2-nitropropane-1,3-diol, 72
Even after the time, ammonia and hydrogen sulfide are not detected, and an excellent deodorizing effect is maintained. On the other hand, in the comparative example, the effect of removing hydrogen sulfide is observed even after 72 hours, but ammonia has already been detected and the deodorizing effect has been lost after 24 hours.

〔The invention's effect〕

The night soil deodorizing composition containing 2-bromo-2-nitropropane-1,3-diol according to the present invention is an extremely good urinary rot decomposition inhibitor as well as the night soil as shown in the above Examples. Since it has a deodorizing effect on the decomposition products of, it exhibits an extremely excellent deodorizing effect. Therefore, it is extremely effective as a treatment composition for a flush water circulating toilet.
In addition, 2-bromo-2-nitropropane-1,3-diol has little effect on activated sludge and does not adversely affect additives such as fragrances and coloring agents. In addition to the above, preparations of any dosage form such as powders, granules, tablets and the like can be made according to the purpose of use.

The present invention provides a very excellent night soil deodorizing composition, and its public health and industrial significance are extremely large.

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Hiroyuki Suzuki 12-54, Goi-minamikaigan, Ichihara-shi, Chiba Japan, Japan Functional Products Research Laboratories (56) References JP-A-61-234860 (JP, A) 52-61221 (JP, A) JP 40-8917 (JP, B1) British Patent 1057131 (GB, A) Edited by the Japanese Society of Antimicrobial Prevention and Encyclopedia, "Encyclopedia of Antimicrobial and Preventive Agents" 61-8-22) Japan Society for Antimicrobial Prevention and Prevention. 202J. Soc. Cosmet. Chem. , 29D. M. Bryce et al. , P. 3-24 (1978) Fd. Cosmet. Toxicol. , 17I. Schmeltz and A.S. Wenger, P .; 105-109 (1979) Pharmacol. , 16 Sup pl. , B. Croshaw et al. , 120T-130T (1964). appl. Bact. , 36R.J. Stretton and T.W. See Mauson, P .; 61-76 (1973) Chemotherapy, 21 [7] Arimura, Kitagawa, P.K. 1283-1287 (1973) New drugs and clinical practice, 23 [5] Yoneda et al., P. 165-167 (Showa 49) Cosmetics and Toiletries, Vol. 92 p. 87-88 (1977)

Claims (1)

(57) [Claims] (1) 2-bromo-2-nitropropane-1,3-
A odor-containing deodorizing composition for toilets of trains, buses, aircraft, and ships, which uses circulating washing water, which contains a diol.