JPH04338290A - Water purifying device - Google Patents

Abstract

PURPOSE:To enhance water purification performance by maintaining a state in which oxygen exists sufficiently in a microorganism treating tank to establish the environment where aerobic water purifying bacteria are liable to propagate with the water purifying device for household or industrial water to be used for purification of water, such as water for swimming pools, water for water tanks for fancy fishes and water for fish culture. CONSTITUTION:This device is constituted of a water septic tank 2 which contains biofilter media 1, a UV irradiation device 3 which is provided on the downstream side of the water septic tank 2, a water tank 4 which is provided on the downstream side of the UV irradiation device 3, an air feeder 5 which is provided on the upstream side of the water septic tank 2 and sends air, a pump 6 which is provided on the upstream side of the air feeder 5 and forcibly circulates the water in the water tank 4, and force circulation paths 7 connected to the respective devices mentioned above. The air feeder exists upstream of the water septic tank where aerobic microorganisms, i.e., ammonia oxidizing bacteria and nitrite oxidizing bacteria are cultured and, therefore, the oxygen in the air comes into contact with the microorganisms and the ammonia and nitrous acid are efficiently oxidized to nitric acid. There is thus the effect of providing the environment where fishes can easily live.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water purification device for domestic or commercial water such as pool water, ornamental fish tank water, and fish culture water.

0002

BACKGROUND OF THE INVENTION Conventionally, this type of water purification apparatus is shown in FIG.
It has a structure like this. That is, ultraviolet lamp 3
An ultraviolet irradiation tank 35 equipped with a microorganism irradiation tank 35, a first microorganism treatment tank 36 equipped with a microorganism implantation body, and a second microorganism treatment tank 37 are connected in series. Between each tank are inlets 38, 39, and 40 for introducing treated water from a fish breeding tank (not shown) or the treated water tank into the treated water tank, and untreated water to the next treated water tank or the fish tank. The discharge ports 41, 42, and 43 for sending out to the breeding tank are connected with hoses. Furthermore, there is no means for increasing the activity of each microbial treatment tank, such as oxygen supplementation.

0003

[Problems to be Solved by the Invention] In general, in ornamental fish tanks, the water in the tank is contaminated with ammonia and dirt due to the metabolic effects of the fish, decomposition of uneaten food, and excreta, as well as the growth of pathogenic bacteria. There are challenges. Furthermore, nitrous acid, which is generated during the decomposition process of nitrogen compounds such as ammonia, is also toxic to fish, which has been a major issue.

In an attempt to partially solve these problems, purification filters using microorganisms and sterilization means using ultraviolet rays have recently been proposed, as shown in the above-mentioned conventional examples.

[0005] However, ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, which convert ammonia and nitrite into nitric acid without toxicity to fish, are aerobic microorganisms and cannot demonstrate their abilities unless there is sufficient oxygen. For this reason, the conventional configuration in which microbial treatment tanks are simply connected in series has a problem in that it is not possible to maintain the inside of the microbial treatment tank in an optimal aerobic breeding state.

[0006] The present invention solves these conventional problems by creating a state in which sufficient oxygen exists in the microbial treatment tank, so that aerobic ammonia-oxidizing bacteria and nitrite-oxidizing bacteria can easily breed, and The purpose is to improve the purification performance of water purification equipment by creating an environment where it is easy to demonstrate its water purification ability.

[0007]

[Means for Solving the Problems] In order to solve the above problems, the water purification device of the present invention includes a water purification tank having a built-in biological filter material, an ultraviolet irradiation device provided on the downstream side of the water purification tank, and the A water tank provided on the downstream side of the ultraviolet irradiation device, a pump provided on the upstream side of the air supply device for forcibly circulating the water in the water tank, a forced circulation path connected to each of the devices, and the water tank. and an air supply device consisting of an air pump via a gas-liquid separation means that is in contact with the forced circulation path provided on the upstream side of the septic tank.

[0008]

[Operation] According to the above-described structure, when water is circulated by the pump, the aquarium water containing organic matter such as fish excrement and uneaten food, as well as ammonia and nitrite produced by the decomposition of the organic matter, is removed. , a pump mixes air with an air supply device and sends it to the water purification tank. Therefore, ammonia and nitrite in the aquarium are efficiently removed in an oxygen-rich atmosphere by ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, which are artificially cultured aerobic microorganisms that adhere to the surface of biological filter media in water purification tanks. It is often oxidized to nitric acid, making the water harmless to fish and purified.

[0009]Furthermore, pathogenic bacteria of fish that breed in the aquarium are
After flowing out of the water purification tank, it flows into the ultraviolet irradiation equipment and is killed by ultraviolet light.

[0010] Such purification and sterilization effects keep the water in the aquarium clean at all times.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, a water purification tank 2 containing a biological filter material 1, an ultraviolet irradiation device 3 provided on the downstream side of the water purification tank 2, and a water tank provided on the downstream side of the ultraviolet irradiation device 3 4, an air supply device 5 provided on the upstream side of the water purification tank 2 for sending air, a pump 6 provided on the upstream side of the air supply device 5 for forcibly circulating the water in the water tank 4, and each of the above devices. It consists of connected forced circulation paths 7. The air supply device 5 also has a forced circulation path 7 as shown in FIG.
A part of the gas-liquid separation means is replaced with a pipe 5a made of water-repellent porous polytetrafluoroethylene resin (trade name: POREFLON, manufactured by Sumitomo Electric Industries, Ltd.), and an air chamber 5b is provided to surround this pipe 5a. The air pump 5c is configured to send air into the forced circulation path through the chamber 5b.

[0013] In this example, saddle rock type ceramics made from blast furnace granulation was used as the biological filter material. This granulated blast furnace is produced by rapidly cooling 0.5 tons of slag generated per 1.0 tons of molten iron from blast furnaces in steel plants, and is mainly used as a cement material and soil conditioner. Blast furnace granules are porous and vitreous, including CaO and SiO2.
, Al2 O3 as the main components, and also MgO, Fe
Contains O etc.

In the above configuration, since there is an air supply device upstream of the water purification tank in which aerobic microorganisms such as ammonia-oxidizing bacteria and nitrite-oxidizing bacteria are artificially cultured, oxygen in the air is absorbed into the ammonia-oxidizing bacteria. and nitrite-oxidizing bacteria, and can efficiently oxidize ammonia and nitrite to nitric acid. Ammonia and nitrite are fish toxic and harmful to fish. However, nitric acid is not toxic to fish and is efficiently oxidized to nitric acid, which has the effect of providing a livable environment for fish without the need to regularly replace the water in the aquarium.

Furthermore, there is no need to provide an extremely narrow portion in the forced circulation path, and there is no fear that the forced circulation path will be clogged by foreign matter or the like.

Next, another embodiment of the present invention will be explained using FIGS. 3 and 4. 3 and 4, the difference from the previous embodiment is that the air supply device 5 is provided integrally with the lower part of the water purification tank 2. In Figure 4, a water-repellent porous polytetrafluoroethylene resin (product name: POREFLON, manufactured by Sumitomo Electric Industries, Ltd.) is attached to the bottom of the saddle-lock ceramics, which is a biological filter material.
The air chamber 5b is provided with a sheet 5d and has a configuration in which gas and liquid are separated.
An air pump 5c is provided through the air chamber 5b.
The structure is such that air is sent into the forced circulation path. According to this configuration, air is supplied to the entire lower part of the biological filter medium through the water-repellent porous polytetrafluoroethylene resin sheet 5d, so that air can be supplied to the entire biological filter medium. This has the effect of creating an environment in which ammonia-oxidizing bacteria and nitrite-oxidizing bacteria are efficiently activated throughout the biological filter medium.

Another embodiment of the present invention will be described with reference to FIG. In FIG. 5, the configuration is almost the same as that of the second embodiment, but the difference is that the air supply device 5 is installed in the lower part of the water purification tank 2 using water-repellent porous tetrafluoroethylene resin (
A tube 5e of Sumitomo Electric (trade name: POREFLON) was provided,
The air pump 5c is configured to send air into the forced circulation path through the tube 5e. It is clear that with this configuration as well, substantially the same effects as in the second embodiment can be obtained with a simple configuration.

[0018]

As described above, according to the water purification device of the present invention, the air supply device is installed upstream of the water purification tank in which ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, which are aerobic microorganisms, are artificially cultured. Therefore, oxygen in the air comes into sufficient contact with ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, and can efficiently oxidize ammonia and nitrite to nitric acid. Ammonia and nitrite are fish toxic and harmful to fish. However, nitric acid is not toxic to fish and is efficiently oxidized to nitric acid, which has the effect of providing a livable environment for fish without the need to regularly replace the water in the aquarium.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

[Figure 2]
A sectional view of main parts in the first embodiment of the present invention

FIG. 3 is a configuration diagram of a second embodiment of the present invention.

[Figure 4] Second aspect of the present invention
Main part configuration diagram in the example of

[Fig. 5] Cross-sectional view of main parts in the third embodiment of the present invention

[Figure 6] External perspective view of a conventional microbial treatment tank for water purification

[Explanation of symbols]

1 Biological filter material 2 Water septic tank 3. Ultraviolet irradiation device 4 Aquarium 5 Air supply device 6 Pump 7. Forced circulation path

Claims (2)

[Claims] 1. A water purification tank with a built-in biological filter, an ultraviolet irradiation device provided downstream of the water purification tank, a water tank provided downstream of the ultraviolet irradiation device, and an upstream of the air supply device. a pump provided on the side for forcibly circulating water in the water tank; and a forced circulation path connected to each of the devices;
and an air supply device comprising an air pump via a gas-liquid separation means in contact with the forced circulation path provided upstream of the water purification tank. 2. The water purification device according to claim 1, wherein the gas-liquid separation means is made of a water-repellent porous material.