JPH05285472A - Sterilization of liquid - Google Patents

Abstract

PURPOSE:To enable efficient sterilization while suppressing the use of a chemical agent as low as possible, in sterilizing the liquid in a container by applying vibration energy to the vibration body in the container, by pressurizing the liquid in the container to specific pressure or more. CONSTITUTION:Liquid sterilizing machinery is constituted of a circulating liquid storage tank 5, a pressurizing device 3, a sterilizing container 1 and a pressure control device 8. A vibration body is provided to a container main body or in a container 1 and a liquid to be sterilized is stored in the storage tank 5 and bacteria contained in the liquid are sterilized by vibration energy by applying vibration energy to the vibration body while circulating the liquid. At this time, the liquid in the container 1 is pressurized to 1kg/cm<2> or more. By pressurizing the liquid, the propagation of vibration energy becomes well and sterilizing effect can be enhanced.

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a liquid sterilization method. [0002] Conventionally, as a sterilizing method for drinking water, washing water in each factory, raw water, processed water such as marine products and water in a storage tank, a chlorine-based agent such as sodium hypochlorite has been used. Sterilization is often used. However, since sodium hypochlorite is a chemical substance, there are problems that it chemically reacts depending on the intended use of water to change the flavor and components of the processed product, and produces offensive odor substances such as trihatamethane. . The problem to be solved by the present invention is to provide a liquid sterilization method in which the amount of the drug used is reduced or the drug is not used. In order to solve the above problems, the liquid is sterilized by pressurizing the liquid and irradiating the liquid with vibration energy. Furthermore, by performing deaeration of the liquid before performing the pressure sterilization, the sterilization effect is further improved. By applying pressure to the liquid when the liquid is irradiated with the vibration energy, the propagation of the vibration energy is improved and the sterilization effect is improved. Further, by degassing the liquid before the irradiation of the vibration energy, the absorption of the vibration energy into the dissolved gas is reduced, and the sterilization effect is improved. An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic explanatory diagram of a method of performing sterilization while circulating a liquid in a circulation storage tank and a sterilization container. Figure 2
FIG. 3 is a schematic explanatory view of a batch type liquid sterilization method in which a liquid is stored in a sterilization container, irradiated with vibration energy for a certain period of time, sterilized, and then injected into a liquid storage tank. Regarding the circulating sterilization method shown in FIG.
An implementation method will be described. An outline of the configuration of the equipment for carrying out the method comprises a liquid storage tank, a pressurizing device, a sterilization container and a pressure adjusting device. As shown in FIGS. 5 and 6, the sterilization container has a vibrating body inside or inside the container body. The liquid to be sterilized is stored in the liquid storage tank, and the liquid to be sterilized is sterilized while circulating the liquid storage tank and the sterilization container. Bacteria contained in a liquid are sterilized by vibration energy by the vibration energy from the vibration energy transmitter installed in the sterilization container body or in the container. Vibration energy is 1 to 1000 k
By irradiating with vibrational energy of Hz, cavitation is generated on the surface of bacteria in the liquid, and the pressure causes sterilization by destroying cell walls or sterilization by heat energy generated in bacterial cells. The sterilizing effect varies depending on the circulation amount and circulation time of the liquid and the vibration energy to be irradiated, but the circulation time, the intensity of vibration energy and the vibration frequency can be determined depending on the purpose of sterilization. Vibration frequency is single frequency, change of single frequency with time,
Mix multiple frequencies or use modulation frequencies properly according to the purpose of sterilization. An embodiment of the batch type sterilization method shown in FIG. 2 will be described. The configuration of the apparatus for carrying out the method is
It is composed of a pressure device, a pressure-resistant sterilization container, a pressure adjusting device, and a liquid storage tank. The sterilization method is to inject a liquid into the sterilization container with a pressurizing device or a conveying device, raise the pressure inside the container to a predetermined value with a pressure adjusting device with the pressurizing device, and install it inside the sterilizing container main body or inside. The liquid is sterilized by irradiating the liquid with vibration energy from the vibrating body. The sterilization method in the sterilization container is the same as that described above. After the sterilization is completed, the sterilized liquid is transported to the liquid storage tank. FIG. 3 and FIG. 4 are schematic explanatory views of the above-mentioned circulating liquid sterilization method and batch liquid sterilization method, in which the liquid is degassed before being injected into the sterilization container. The configuration of the apparatus for carrying out the method of the present invention is such that a deaerator is additionally installed in the above-mentioned apparatus, and a membrane deaerator or the like is used as the deaerator. The membrane deaerator is a method for deaerating a liquid by means of a gas-liquid separation membrane that is divided into a liquid phase to be degassed and a vacuum phase, and is a device that does not concentrate the liquid and change the temperature. The sterilization method is a method in which a liquid is degassed by a degasser to a dissolved oxygen concentration of 0.5 mg / L or less, transported to a sterilization container, and sterilized in the sterilization container. As a result of the practice of the present invention, when the liquid is irradiated with the vibrational energy, the vibrational energy can be propagated better by pressurizing the liquid, and by further degassing the liquid, Cavitation centered on the air in the liquid is suppressed, absorption of vibration energy into dissolved gas is reduced, and the sterilization effect is improved, so it is possible to perform efficient sterilization while suppressing the use of chemicals as much as possible. became.
More specifically, it has become possible to supply sterilizers to pools and the like, and sterilizers to cages, while suppressing the use of chlorine-based sterilizing agents.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 An embodiment of claim 1 of the present invention. FIG. 2 Another embodiment of claim 1 of the present invention. FIG. 3 An embodiment of claim 2 of the present invention. Example [FIG. 4] Another embodiment of claim 2 of the present invention [FIG. 5] One embodiment in which a vibrating body is installed in the main body of the sterilization container [FIG. 6] Example [Explanation of reference numerals] 1 sterilization container 2 deaerator 3 pressurizer 4 circulation pump 5 circulating liquid storage tank 6 liquid storage tank 7 vibrating body 8 pressure adjusting device

Claims (1)

Claims: 1. A sterilizer for sterilizing a liquid by installing a vibrating body in or inside a three-dimensional container body, filling the container with liquid, and applying vibration energy to the vibrating body. In the method, the liquid in the container is 1 kg per square cm.
A method for sterilizing a liquid, which comprises pressurizing as described above. 2. A liquid sterilization method comprising a step of degassing a liquid before the sterilization step according to claim 1.