JP3505596B2 - Nori sterilization method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for sterilizing laver collected from a laver net with a bactericide. 2. Description of the Related Art Nori has conventionally been referred to as green leafy vegetables of the sea, and since it is rich in minerals, it has become an indispensable material for dining tables. Nori is collected by setting up a net in the sea, winding up the cultured nori, washing with inorganic or organic acid to dissolve and remove the nori and diatoms attached to the nori net, then separating and heating the nori Dry and commercialize. There is also a method in which a washing tank is provided on a hull, and laver nets are passed through a washing solution together with laver or sprayed with a washing solution to continuously wash. [0003] As described above, it is possible to remove the dirt and the like adhering to the laver and the laver net by washing them with an inorganic acid or an organic acid as described above. Bacteria attached to waste products produced by living action during aquaculture cannot be sufficiently removed, and there is a danger that they will remain and cause problems such as infection. An object of the present invention is to effectively sterilize the seaweed after or before the acid treatment and enhance the safety as food. It is another object of the present invention to maintain the freshness of the laver by reducing it after sterilization treatment in order to prevent oxidation by a fungicide remaining in the laver. [0004] The present invention, namely wherein reducing the laver collected from laver network after sterilization treatment with chlorine dioxide or hypochlorite aqueous alkali solution, a sterilizing agent remaining in seaweed in d Risorubin acid or erythorbic acid salt It's a nori net
This is a method of sterilizing seaweed collected . DESCRIPTION OF THE PREFERRED EMBODIMENTS In order to carry out the present invention, seaweed collected in advance is put into an activation tank using a pump or the like, the seawater is circulated and washed, and slime and small sized slime adhered thereto. Remove marine life such as shrimp and shellfish. After washing with seawater, the sludge-like laver is sent to a water tank and finely crushed into a minced form, which is then washed while circulating fresh water. Next, the laver is transferred to a sterilization tank in which a bactericide is added to fresh water, and sterilized for about 10 to 20 minutes with stirring. The concentration of the fungicide is 1 to 1 as chlorine dioxide.
00 ppm, preferably 3 to 50 ppm. As a source of chlorine dioxide, in addition to chlorine dioxide water, an acid may be added to an aqueous solution of alkali chlorite such as sodium chlorite to generate chlorine dioxide gas. As the alkali hypochlorite, usually use sodium hypochlorite,
The effective chlorine concentration is adjusted to about 20 to 100 ppm. The use amount of these fungicides is about 1 to 3 liters as an aqueous solution of the above concentration per 1 kg of wet laver. More preferred as a disinfectant is chlorine dioxide. [0006] The solution containing the seaweed that has been sterilized is sent to a reduction tank to reduce the fungicide remaining in the seaweed. In the reduction tank, fresh water and a reducing agent are added and circulated by a pump or the like. Next, it is sent to the process for making laver, and plate-like laver is formed on the laver. The reducing agent used erythorbic acid salts such as sodium et Risorubin acid or erythorbic acid. The treatment time with the reducing agent is about 10 to 20 minutes, and the amount of the reducing agent used is 10 to 100 per kg of laver.
mg. The seaweed that has been subjected to the reduction treatment is commercialized by removing the slab and heating and drying it. Although ascorbic acid and erythorbic acid both have strong reducing power, erythorbic acid or sodium erythorbate is preferably used in consideration of the heat treatment in the subsequent step. EXAMPLE 1 Nori collected from a laver net was placed in an active tank having an internal volume of 10 m ³ , washed with seawater to remove marine organisms, and then moved to a water tank having an internal volume of about 400 l. Finely grind and wash with fresh water. 400 l of water was put into a separately provided sterilization treatment tank having an internal volume of 1,000 l, 8 l of chlorine dioxide water having a ClO ² concentration of 0.2% by weight was added, and about 300 kg of the wet laver obtained as described above was added. The mixture was stirred for 10 minutes and sterilized, and the ClO ² concentration became 40 ppm. Erythorbic acid was added to a separately provided reduction tank with an internal volume of 400 l.
Fill 40 l of a 4% by weight aqueous solution. A solution containing the seaweed after the sterilization treatment was added thereto, and the mixture was circulated and contacted by a pump for 15 minutes to perform a reduction treatment. The obtained slurry-like laver was transferred using a pump, taken into a mechanized strainer, and subjected to a hot-air drying step to obtain a plate-like laver. In this way, a very glossy and dense plate-like laver was obtained visually. The analysis results of the components adhering to the laver in each step are as follows. COMPARATIVE EXAMPLE The laver after the sterilization treatment was washed with water, and a plate-like laver was obtained in exactly the same manner as in Example 1 except that the reduction treatment with erythorbic acid was not performed. In this laver, some yellowing occurred and the freshness was reduced. The same phenomenon was observed when the sterilization treatment was not performed. According to the present invention, it is possible to effectively sterilize bacteria adhering to waste products produced as a living action during laver cultivation. The disinfectant used in the present invention is a drug approved by the food additive method, and the disinfectant remaining in the laver after disinfection is easily reduced by a reducing agent that is also a nutrient for the human body. These reducing agents are also useful for maintaining the freshness of laver.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-130055 (JP, A) JP-A-61-104773 (JP, A) JP-A-3-130062 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A23L 1/337 A23L 3/358

Claims (1)

(57) Patent Claims 1. A laver collected from laver network after sterilization treatment with chlorine dioxide or hypochlorite aqueous alkali solution, in fungicides et Risorubin acid or erythorbic acid salts remaining in the laver A method for sterilizing laver collected from a laver net, comprising reducing.