JPH04338298A - Water purifying device - Google Patents

Abstract

PURPOSE:To maintain the state of allowing oxygen to exist sufficiently in a microorganism treating tank so as to make the environment where aerobic water purifying bacteria are liable to propagate and to the enhance water purification performance of the water purifying device for household or industrial use for purification of water, such as water for swimming pools, water for water tanks for fancy fishes and water for fish culture. CONSTITUTION:A UV irradiation device 3 is provided on the downstream side of a water septic tank 2 contg. biofilter media 1. A water tank 4 is provided on the downstream side of this UV irradiation device 3 and a pump 6 for forcibly circulating the water is provided on the downstream side of this water tank 4. A water flow switching cock A is provided downstream of this pump 6 and an air inflow path 5b constituted of the other end of a gas- liquid separating membrane 5c on the side is provided downstream of the water flow switching cock A. An air feeder 5 having a feed nozzle 5a of the shape smaller than the sectional area of the circulating path of the water is provided. A water flow switching cock B is provided downstream of the above-mentioned feed nozzle 5a. This water flow switching cock B is provided upstream of the above-mentioned water septic tank 2. The respective devices mentioned above are connected by circulating paths 7, by which the water purifying device having the excellent water purifying property and maintenance property is obtd.

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 purifying water such as pool water, ornamental fish tank water, and fish culture water.

0002

[Prior Art] Conventional water purification devices of this type include, for example,
As shown in Japanese Utility Model Application Publication No. 58-195697, it has a structure as shown in FIG. That is, an ultraviolet irradiation tank 35 equipped with an ultraviolet lamp 34 inside, a first microbial treatment tank 36 and a second microbial treatment tank 3 equipped with microbial implants.
7 are connected in series. That is, each tank has an inlet 38, 39, 40 for introducing the treated water from the previous treated water tank into the next treated water tank, and an outlet for sending the treated water to the next treated water tank or tank. 41, 42, and 43 with hoses.

0003

[Problems to be Solved by the Invention] However, the conventional configuration described above has a problem in that it is not possible to maintain the aerobic bacteria in the microbial treatment tank in an optimum breeding state.

For example, in aquarium fish tanks, problems such as ammonia, fish-toxic nitrite, and the proliferation of pathogenic bacteria occur due to the decomposition of excreta and uneaten food due to fish metabolism. In order to convert ammonia and nitrite into nitric acid that is not toxic to fish, it is necessary to maintain aerobic microorganisms such as ammonia-oxidizing bacteria and nitrite-oxidizing bacteria in optimal breeding conditions.

[0005] The present invention solves these conventional problems,
The purpose of the present invention is to provide a water purification device which maintains a state in which sufficient oxygen exists in a microbial treatment tank, facilitates the propagation of aerobic ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, and has excellent safety.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the water purification device of the present invention is provided with an ultraviolet irradiation device on the downstream side of a water purification tank containing a biological filter material, and on the downstream side of the ultraviolet irradiation device. A water tank is provided in the water tank, a pump for forcibly circulating water is provided on the downstream side of the water tank, a water flow switching cock A is provided downstream of the pump, and the other end is connected to the side downstream of the water flow switching cock A. An air supply device is provided which has an air inflow path composed of a liquid separation membrane and a supply nozzle having a shape smaller than the cross-sectional area of the water circulation path, and a water flow switching cock B is provided downstream of the supply nozzle to control the water flow. A switching cock B is provided upstream of the water purification tank, and each of the above devices is connected by a circulation path.

[0007]

[Operation] With the above-described structure, when water is circulated by the pump, the present invention collects organic matter such as fish excrement and uneaten food, as well as ammonia and nitrite produced by the decomposition of the organic matter, in the aquarium. Air is mixed into the water by the air supply device and sent to the water purification tank. Therefore, ammonia and nitrite in water 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. Oxidized to nitric acid, the water becomes harmless to fish and purified.

[0008]Furthermore, the 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.

[0009] Such purification and sterilization effects keep the water in the aquarium clean at all times. Also, fish excrement,
The supply nozzle of the air supply device will not be clogged with foreign objects such as leftover food or shellfish.

0010

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

FIG. 1 is a cross-sectional view thereof, and shows that an ultraviolet irradiation device 3 is provided downstream of a water purification tank 2 containing a biological filter material 1, and a water tank 4 is provided downstream of the ultraviolet irradiation device 3. . An air supply device 5 for feeding air is provided upstream of the water purification tank 2, and a pump 6 for forcibly circulating the water in the water tank 4 is provided upstream of the air supply device 5. It is connected by Route 7. In addition, as shown in FIG. 2, the air supply device 5 includes an air inflow channel having a mortar-shaped supply nozzle 5a smaller than the cross-sectional area of the circulation path, and a gas-liquid separation membrane 5c at the other end on the side of the supply nozzle 5a. It has a structure in which air is sent into the circulation path 7 through the passage 5b. Further, a water flow switching cock A and a water flow switching cock B are provided as water flow switching means upstream and downstream of the air supply device 5, respectively, and water is supplied from the pump 6 to the water purification tank 2 to the water flow switching cock A and the water flow switching cock B, respectively. The water flow switching cock A and the water flow switching cock B are intermittently operated, and at certain times, as shown in FIG. Air supply device 5, water flow switching cock B
Water flows to the water purification tank through the pump 6, and at certain times, water flows from the pump 6 to the water purification tank via the water flow switching cock B, the air supply device 5, and the water flow switching cock A, as shown in FIG. Therefore, in the air supply device, the water flow is intermittently reversed to prevent clogging.

[0012] 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 mills, and is mainly used as a cement material and soil conditioner. Blast furnace granules are porous and vitreous, with CaO, SiO2
, Al2 O3 as the main components, and MgO, F
Contains eO 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, foreign matter such as fish excrement, leftover food, and shellfish can clog the supply nozzle of the air supply device, which has the smallest cross-sectional area in the circulation path. is reversed, allowing foreign matter clogging the supply nozzle to be removed. Therefore, there is an effect that a stable amount of water and air can be supplied without causing clogging.

[0015]

[Effects of the Invention] As described above, the water purification device of the present invention has an air supply device upstream of the water purification tank in which ammonia-oxidizing bacteria and nitrite-oxidizing bacteria, which are aerobic microorganisms, are artificially cultured. First, 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.

Furthermore, foreign matter such as fish excrement, leftover food, and shellfish can clog the supply nozzle of the air supply device, which has the smallest cross-sectional area in the circulation path, but the water flow switching cocks A and B can control the water flow. is reversed, allowing foreign matter clogging the supply nozzle to be removed. Therefore, there is an effect that a stable amount of water and air can be supplied without causing clogging.

[Brief explanation of the drawing]

FIG. 1: Cross-sectional view of a water purification device in an embodiment of the present invention.

[
Figure 2: Cross-sectional view of the air supply device

[Figure 3] Cross-sectional view of the air supply device

[Figure 4] Perspective view of a conventional water purification device

[Explanation of symbols]

1 Biological filter material 2 Water septic tank 3. Ultraviolet irradiation device 4 Aquarium 5 Air supply device 6 Pump 7 Circulation route A Water flow switching cock A B Water flow switching cock B

Claims (1)

[Claims] Claim 1: An ultraviolet irradiation device is provided downstream of a water purification tank containing a biological filter, a water tank is provided downstream of the ultraviolet irradiation device, and a pump is provided downstream of the water tank to forcibly circulate water. A water flow switching cock A is provided downstream of the pump, and downstream of the water flow switching cock A, there is an air inflow channel whose other end is constituted by a gas-liquid separation membrane on the side, and the water circulation channel is disconnected. An air supply device having a supply nozzle having a shape smaller than the area is provided, a water flow switching cock B is provided downstream of the supply nozzle, the water flow switching cock B is provided upstream of the water purification tank, and each of the above devices is connected by a circulation path. water purification equipment.