JP3733807B2 - How to prevent rot odor of jellyfish - Google Patents

Description

【００２２】
表１より次のことが明らかである。
即ち、カリウムミョウバン無添加（比較例１）では一日後にはＨ_２Ｓなどの悪臭が発生し始め、経過日数と共にいずれの臭気成分濃度も増加する傾向を示した。一方、カリウムミョウバン５００ｍｇ／Ｌ添加の場合（実施例１）では、７日以降Ｈ_２Ｓの発生が認められるが、悪臭の発生をかなり抑制できた。また、１０００ｍｇ／Ｌ、２０００ｍｇ／Ｌ添加すると（実施例２，３）、１６日経過しても悪臭の発生は認められなかった。
【００２３】
このようにクラゲにカリウムミョウバンを接触させることにより、腐敗の進行が抑えられ、悪臭の発生を防止できることが確認された。
【００２４】
なお、カリウムミョウバンを５００ｍｇ／Ｌ添加した実施例１において、添加後１日放置した後に、ポリビンのヘッドスペース中の気体の生臭さの有無を調べたところ、生臭さは感じられなかった。
【００２５】
比較例２
カリウムミョウバンの代わりに硝酸カルシウムを５００ｍｇ／Ｌ添加したこと以外は実施例１と同様にして、添加後１日経過したものについてヘッドスペース中臭気成分濃度を測定すると共に、生臭さの有無を調べた。その結果、Ｈ_２Ｓ、ＭＭ、ＮＨ_３はいずれも検出されなかったが、ヘッドスペース中の気体は生臭さを有しており、硝酸カルシウムでは、クラゲの生臭さを防止できないことが確認された。
【００２６】
【発明の効果】
以上詳述した通り、本発明のクラゲの腐敗臭防止方法によれば、クラゲの腐敗臭や生臭さを効果的に防止して、作業環境や周辺環境を改善することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to rancidity prevention method jellyfish, particularly to effectively prevent to that corruption smell prevention method rancidity when disposing of adhering or flocked jellyfish in sea water channel for water sampling the industrial cooling water .
[0002]
[Prior art]
Seawater is used in large quantities as industrial cooling water in plants such as power plants, chemical complexes, and steelworks, but floating seawater organisms such as jellyfish that have rushed to the seawater channel for sampling this seawater are left unattended. Then, in order to cause various troubles such as piping blockage, reduction of seawater sampling, cooling efficiency, equipment failure, equipment operation efficiency such as power generation equipment, etc. It is collected by deep-fried. The collected jellyfish, etc. are temporarily stored in the primary storage tank, and when this storage tank is full, it is transferred to another secondary storage tank with a pump and disposed of. As a result, problems such as deterioration of the working environment and complaints from neighboring residents have arisen.
[0003]
In addition, the seawater channel for sampling this seawater is attached with seawater organisms such as mussels, barnacles, and hydroworms, causing the same problems as described above. Need to be disposed of. In this stripping and removal, seawater is discharged from the waterway and the shells are peeled off, and these are collected and taken out, but since it takes a considerable time from peeling to discharging, shellfish decay begins during this time. There has been a problem that a bad odor is generated and the working environment in the water channel is rapidly deteriorated.
[0004]
Such a rotting odor of seawater organisms is mainly caused by hydrogen sulfide (H ₂ S), methyl mercaptan (MM), ammonia (NH ₃ ), etc. generated by the rot of seawater organisms.
[0005]
Conventionally, masking agents, metal salts, chlorine-based oxidizing agents, hydrogen peroxide-based oxidizing agents, or nitrates (Japanese Patent Laid-Open No. 10-330206) are used to prevent the rot odor of seawater organisms.
[0006]
[Problems to be solved by the invention]
However, although the masking agent improves odor quality and odor intensity, it is impossible to remove H ₂ S, MM and NH ₃ generated by decay, so that the problem cannot be solved fundamentally. Can not. In addition, depending on the application location, it may lead to an increase in COD and contaminate public water areas.
[0007]
On the other hand, if it is a metal salt, a chlorine-based oxidant, a hydrogen peroxide-based oxidant, or a sulfate, it is possible to remove the odor-causing substances. Of these, the metal salt removes H ₂ S. Although it can, MM cannot be removed. Also, depending on the application site, there is a risk of contamination of public water areas by heavy metals, as well as masking agents, and there is also a risk of visual pollution due to coloring. Chlorine oxidants can remove H ₂ S and MM to some extent, but they are dangerous to handle and have toxicity issues with fish and are limited in use. In addition, the hydrogen peroxide-based oxidant is effective in removing H ₂ S and MM, similarly to the chlorine-based oxidant, but the residual hydrogen peroxide is toxic to marine organisms such as fish and has a problem.
[0008]
Nitrate can prevent the generation of H ₂ S, MM and NH ₃ and is excellent in handleability, but has a disadvantage that it does not have a deodorizing effect on the raw odor unique to seawater organisms.
[0009]
The present invention solves the above conventional problems, is responsible for the jellyfish rancidity H _{2 S,} on which can effectively prevent the formation of MM and NH _3, against jellyfish peculiar fishy smell Another object of the present invention is to provide a method for preventing rot odor of jellyfish which exhibits a good deodorizing effect and is easy to handle and has no problem of environmental pollution .
[0010]
[Means for Solving the Problems]
Jellyfish method of rancidity prevention of the present invention, a jellyfish, the jellyfish reservoir, and wherein the contacting with water containing potassium aluminum sulfate AlK _{(SO 4) 2,} or aluminum sulfate Sodium AlNa _{(SO 4) 2.}
[0011]
If potassium aluminum sulfate AlK (SO ₄ ) ₂ or sodium aluminum sulfate AlNa (SO ₄ ) ₂ (hereinafter referred to as “aluminum sulfate salt”) , rot of jellyfish can be effectively prevented, and jellyfish It is also effective in preventing raw odors. In addition, handling is easy and there is no risk of environmental pollution. Therefore, malodor generation in the jellyfish storage tank can be prevented, and the surrounding environment and working environment can be improved .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
[0013]
In the present invention, aluminum potassium sulphate AlK _{(SO 4) 2} (potassium alum), Ru using aluminum sulfate Sodium AlNa _{(SO 4) 2} (sodium alum). These aluminum sulfate salts may be used in combination of two kinds, but in the present invention, a sufficient effect of preventing rot odor can be obtained only by using one kind alone.
[0014]
As a method for preventing the rot odor of jellyfish using an aluminum sulfate salt , the following method can be employed .
[0015]
Previous mentioned as, preparative planktonic marine organisms such as jellyfish which is kakiage at the entrance to the screen of the channel once placed in the primary reservoir, but then sent to the secondary storage tank with a pump, planktonic marine organisms such as jellyfish Begins to rot and stink in these reservoirs.
[0016]
Such to prevent malodors due to corruption jellyfish, it is added and stirred in a container which stores the jellyfish, such as primary and secondary storage tank aluminum sulfate salt, immersing the jellyfish in water containing aluminum sulfate Let
[0017]
In this case, the addition amount of the aluminum sulfate salt is appropriately determined according to the type of jellyfish , the state of rot, the type of aluminum sulfate salt used, etc., so that the odor of spoilage is sufficiently prevented. In the case of using a composite salt of aluminum sulfate such as potassium alum (AlK (SO ₄ ) ₂ · 12H ₂ O), it is about 50 to 10000 mg / L, particularly about 500 to 5000 mg / L with respect to the internal volume of the tank containing jellyfish. It is preferable to add so that it may become the density | concentration of. In this case, the aluminum sulfate salt may be sprayed as a powder, but it is added in the form of an aqueous solution of 5 to 30% by weight, for example, about 10% by weight in terms of handling properties, contact efficiency with jellyfish by stirring, and the like. It is advantageous .
[0018]
When using a sulfuric acid aluminum salt as an aqueous solution, preferably prepared in seawater by dissolving aluminum sulfate salt.
[0019]
Moreover, when the storage period of a jellyfish , ie, the period which prevents a rotten odor, is long, it is suitable to add an aluminum sulfate salt suitably in immersion water .
[0020]
【Example】
Examples and Comparative Examples below illustrate the present invention more specifically.
Examples 1-3, Comparative Example 1: Prevention of rot odor of jellyfish About 1 L of jellyfish collected from the sea was put in 2 L of polybin, and potassium alum AlK (SO ₄ ) ₂ · 12H ₂ O so as to have the concentrations shown in Table 1 (Not added in Comparative Example 1) After stirring for 1 to 2 minutes, the mixture is allowed to stand at 27 ° C. for 16 days in a sealed state. During that time, the concentration of odorous components in the head space of each polybin is measured with a detector tube. Table 1 shows the change over time in the odor component concentration.
[0021]
[Table 1]

[0022]
From Table 1, the following is clear.
That is, in the case where potassium alum was not added (Comparative Example 1), bad odor such as H ₂ S began to appear after one day, and the concentration of any odor component increased with the elapsed days. On the other hand, in the case of adding 500 mg / L of potassium alum (Example 1), generation of H ₂ S was observed after 7 days, but the generation of bad odor could be considerably suppressed. Moreover, when 1000 mg / L and 2000 mg / L were added (Examples 2 and 3), generation of malodor was not recognized even after 16 days.
[0023]
Thus, it was confirmed that by bringing potassium alum into contact with jellyfish, the progress of decay can be suppressed and the generation of malodor can be prevented.
[0024]
In Example 1 to which 500 mg / L of potassium alum was added, after standing for 1 day after the addition, the presence or absence of the raw odor of the gas in the head space of the polyvin was examined, and no odor was felt .
[0025]
The ratio Comparative Examples 2
In the same manner as in Example 1 except that 500 mg / L of calcium nitrate was added instead of potassium alum, the concentration of odorous components in the headspace was measured and the presence or absence of raw odor was examined for those that had passed 1 day after the addition. . As a result, none of H ₂ S, MM, and NH ₃ was detected, but the gas in the headspace had a raw odor, and it was confirmed that calcium nitrite cannot prevent the jellyfish 's raw odor. .
[0026]
【The invention's effect】
As described above in detail, according to the jellyfish rancidity prevention method of the present invention, to effectively prevent rancidity or fishy smell of the jellyfish, it is possible to improve the working environment and surrounding environment.

Claims (2)

A method for preventing a jellyfish rot odor, which comprises bringing a jellyfish into contact with water containing potassium aluminum sulfate AlK (SO ₄ ) ₂ or sodium aluminum sulfate AlNa (SO ₄ ) ₂ in a jellyfish storage tank . Jellyfish potassium aluminum sulfate AlK _{(SO 4) 2,} or by immersion in water containing aluminum sulfate Sodium AlNa _{(SO 4) 2,} jellyfish aluminum sulfate potassium AlK _{(SO 4) 2,} or aluminum sulfate Sodium AlNa _(SO 4) rancidity prevention method of jellyfish claim 1, wherein the contacting with water containing _2.