JPH05131200A - Sea water purification device - Google Patents

Abstract

PURPOSE:To obtain a compact sea water purification device capable of increasing the activity of water-purifying microbe by using an air feed technique which does not allow physical stimulation in a domestic or a commercial sea water purification device for purifying water in a brine aquarium. CONSTITUTION:The subject sea water purification device is equipped with a pressurized water feed means 4, a brine purification module 6, an air feed means 7 for feeding air to water-purifying microbe in the brine purification module so as to minimize physical stimulation, and an ultraviolet emission device 10. Thus it is possible to enhance the activity of aerophilic microbe which decomposes harmful ammonia secreted by fish by oxygen to harmless nitric acid. In addition, pathogenic bacteria proliferated in the water tank for fish can be exterminated using the ultraviolet emission device.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a domestic or commercial seawater purification device for purifying seawater such as water in an aquarium for aquarium or water for fish culture.

[0002]

2. Description of the Related Art Conventionally, this type of seawater purifying apparatus has a structure as shown in FIG. In FIG. 9, the water in the water tank 16 is purified by the seawater purifying tank 18 by the filter medium 19 through the overflow pipe 17, and the water in the water tank 1 by the pump 20.
Returned to 6. Reference numeral 21 is a pipe connecting the water tank 16 and the pump 20. It should be noted that there is no means for enhancing the bacterial activity in the water purification tank, such as supplementing oxygen, or sterilizing means for pathogenic bacteria.

[0003]

Generally, in an aquarium fish tank, there are problems such as generation of ammonia and stains and propagation of pathogenic bacteria in the aquarium water due to the metabolic action of fish, decomposition of uneaten food and excrement. is there. Furthermore, nitrous acid generated in the process of decomposing nitrogen compounds such as ammonia has fish toxicity, which is a big problem.

As an attempt to partially solve these problems, an overflow-type subsea water purification tank has been proposed as shown in a conventional example.

However, in the conventional example, as a filter medium in a seawater purification tank for purifying seawater, there are oyster shells, coral sand, etc., but when these are used, the efficiency is low and, as a result, the size of the seawater purification tank becomes large. However, there is a problem that bacteria for seawater purification are weak against physical stimulation, and aerobic bacteria require oxygen supply without physical stimulation.

The first object of the present invention is to provide a compact seawater purification device.

A second object is to use oxygen supplying means with less physical irritation to effectively propagate aerobic bacteria in the seawater purification tank and further improve the purification performance.

[0008]

In order to achieve the above object, the present invention provides a seawater purification module comprising a mineral substance containing a basic substance as a main component, and a means for supplying aerobic air in the seawater purification module. An ultraviolet irradiation device is arranged in the forced circulation channel of water, and a large amount of artificially cultivated aerobic bacteria and anaerobic bacteria are further propagated in the seawater purification module.

[0009]

In the seawater purification apparatus of the present invention, the individual ceramics contained in the seawater purification module are made of a material containing a basic substance as a main component, and the aerobic bacteria and anaerobic bacteria artificially cultured on the ceramics from the beginning. Since a large amount of bacteria are propagated and an air supply means that does not cause physical irritation to aerobic bacteria is used, the activity of aerobic bacteria that oxidize and decompose harmful ammonia excreted by fish into harmless nitric acid is enhanced. You can Moreover, even if nitric acid accumulates, the PH does not decrease due to the basic component of the ceramic, and since the shape of the ceramic is a tow-shaped cross section and is curved in an arc shape and has a substantially constant size, the water flow of the ceramic is Since any surface will flow in the water flow direction, the resistance of the ceramic will be extremely small and the variation in the resistance value of the water flow will be small. In addition, the pathogenic bacteria of the fish propagated in the aquarium are killed by the ultraviolet irradiation device.

As described above, the water in the water tank is sterilized and purified, and is always kept in a normal state.

[0011]

An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is an external view of an aquarium fish tank to which the seawater purification apparatus of the present invention is applied, and FIG. 2 is a structural principle diagram of the aquarium fish tank. In FIGS. 1 and 2, reference numeral 1 is a water tank, 2 is a base of the water tank, and a seawater purification unit 3 is incorporated therein.
The seawater purification unit 3 is a circulation pump 4 which is a water pressure feeding means,
A seawater purification module 6 containing a microbial immobilization carrier made of a mineral substance 5, an air supply means 7 for introducing outside air into running water by an ejector action, a heater 8, and an ultraviolet irradiation device 10 to which an ultraviolet lamp 9 is attached, and these are connected. The forced circulation flow path 11 is a basic constituent element. The purified seawater from the forced circulation channel 11 is sent to the aquarium 1.
An air separator 12 separates fine air bubbles sucked by the air supply means.

FIG. 3 is a sectional view of the air supply means 7. In FIG. 3, 13 is a supply nozzle for speeding up the circulation flow, and 1
Reference numeral 4 is an air inlet through which air flows in by the suction action of the high-speed jet stream, and 15 is an outflow passage through which a mixed flow of the sucked air and the circulation flow out. A large amount of oxygen is dissolved in this mixed flow, and the dissolved oxygen in the seawater in the water tank 1 or the seawater flowing into the water purification module 6 is always saturated. Since the dissolved oxygen in the seawater in the water tank 1 is saturated, the aeration by the air pump, which is performed in the conventional water tank, becomes unnecessary. Further, the dissolved oxygen of seawater flowing into the seawater purification module 6 becomes saturated, and aerobic bacteria growing on the surface of the mineral matter 5 can take in oxygen without physical stimulation.
Increases the activity of aerobic bacteria. Due to the action of aerobic bacteria, ammonia in water is oxidatively decomposed into nitrate, which is harmless to fish. The oxidative decomposition reaction of ammonia into nitrate is shown below.

NH ₄ ⁺ + 1.5O ₂ → NO ₂ ⁻ + H ₂ O + 2H ⁺ ………… NO ₂ ⁻ + 0.5O ₂ → NO ₃ ⁻ ……………………………………… FIG. 5 is a side view of the mineral substance 5 contained in the seawater purification module 6 of the present invention, and FIG. 5 is a sectional view taken along line ab of FIG. As shown in FIG. 4, the mineral substance 5 of the present invention has a tow-shaped cross section and is curved in an arc shape as shown in FIG. Therefore, there is no part where the mineral matter 5 overlaps and does not come into contact with water, the contact area with water in the seawater purification module can be maximized, and the area where microorganisms can be cultured can also be maximized.

FIG. 6 is a perspective view of the above-mentioned mineral matter 5, and in view of this shape, no matter which direction water hits, it goes in the water flow direction. Therefore, 5 minerals in the seawater purification module
The resistance due to is extremely reduced. As for the individual mineral substances 5 contained in the seawater purification module 6, blast furnace water granulation was used as a raw material. This blast furnace granulation is produced by rapidly cooling slag generated from a blast furnace of an iron mill at a rate of 0.5 ton per 1 ton of molten iron, and is mainly used as a raw material for cement and a soil improving material. Water-granulated blast furnace is, CaO as shown in calcined in a glass chamber of the porous (Table _{1), SiO 2, Al 2} O
₃ and MgO are the main components.

[0015]

[Table 1]

As described above, since CaO is the main component, the pH does not decrease even if NO ₃ ⁻ is produced in the above reaction formula. Further, even if water with low pH is used in various places, it can be neutralized with CaO described above, so that the activity of microorganisms for purifying water can be improved.

Further, on the surface of the mineral substance 5 containing CaO or the like as a main component, many divalent positive ions such as calcium exist in the water. On the other hand, since the microorganisms are negatively charged and water-purifying microorganisms easily attach to the mineral matter 5, the mineral matter 5 is most suitable as a fixed bed of microorganisms.

The pathogenic bacteria of the fish propagated in the aquarium 1 are sterilized by the ultraviolet rays of the ultraviolet irradiation device 10. Further, the ultraviolet rays of the ultraviolet irradiation device 10 also have a function of removing free chlorine, and have a function of further enhancing the environment for raising fish.

Next, in the forced circulation channel 11 for circulating the water in the aquarium for aquarium fish, seawater purification module composed of a mineral substance containing a basic substance as a main component, air supply means, and seawater in which an ultraviolet irradiation device is arranged. The oxygen supply method without physical irritation to the aerobic bacteria propagated on the surface of the minerals in the seawater purification module in the seawater purification device using the artificial culture bacteria of seawater purification bacteria and the bacteria activator for the sterilization and purification system of The effect of the present seawater purifying apparatus of the present invention was determined by the following experiment.

The experiment was conducted using 50 l of aquarium water (27 ° C.) for 2.5 hours.
Flow at a circulating flow rate of ml / min, and add ammonia nitrogen to 1
Added at 1 mg / day. In the seawater purification module, an artificial culture of seawater purification bacteria was propagated in 3 liters of the above mineral substances. Changes in the concentrations of ammonia nitrogen, nitrite nitrogen, and nitrate nitrogen in the aquarium water were measured when the air supply means was placed upstream and downstream of the seawater purification module.

FIG. 7 shows changes in the concentrations of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the aquarium water when the air supply means is arranged upstream of the seawater purification module.

FIG. 8 shows changes in the concentrations of ammonia nitrogen, nitrite nitrogen and nitrate nitrogen in the aquarium water when the air supply means is arranged downstream of the seawater purification module (seawater purification apparatus of the present invention).

As shown in FIG. 7, when the air supply means is arranged upstream of the seawater purification module, ammonia nitrogen in the aquarium water is not detected in 15 days, and nitrite nitrogen is increased even in 30 days.

As shown in FIG. 8, when the air supply means is arranged downstream of the seawater purification module, ammonia nitrogen in the aquarium water is not detected from the first day, and nitrite nitrogen is not detected in 15 days.

[0025]

The following effects can be obtained by using the seawater purifying apparatus of the present invention. (1) Since the air supply means is provided downstream of the seawater purification module, the aerobic bacteria that propagate on the surface of the minerals contained in the seawater purification module must take in oxygen with little physical irritation. Therefore, the activity of bacteria is increased. (2) Generally, the shape of the mineral matter may be spherical, cylindrical, or plate-like, but the plate-like one has the largest surface area with the same volume of mineral matter. However, when a plate-shaped one is built into the seawater purification module, there is a possibility that some minerals may overlap and some parts may not come into contact with water. The mineral substance of the present invention has a toy-like plate-like material and is curved in an arc shape so that it does not overlap with each other, and the contact area with water in the seawater purification module can be maximized. Moreover, since the resistance of the mineral matter is extremely small because the water stream flows in the direction of the water stream regardless of which surface of the mineral matter hits, the output of the pump for forced circulation can be small, and a seawater purification device with low power consumption can be obtained. Furthermore, since the end portions of the individual minerals are stacked in contact with each other, variations in the resistance value of the water flow due to the partial portions are small, and the water flow in the seawater purification module is made uniform. Therefore, the microorganisms can be uniformly cultivated in a wide area in the purification module, so that an efficient water purification device can be obtained. As a result, it can be made compact and compact.

[Brief description of drawings]

FIG. 1 is an external perspective view of a seawater purification device according to an embodiment of the present invention.

FIG. 2 is a sectional view of the structure of the seawater purification device.

FIG. 3 is a sectional view of the air supply means of FIG.

FIG. 4 is a side view of mineral substances contained in the water purification module of the seawater purification device of the present invention.

5 is a sectional view taken along the line ab of FIG.

FIG. 6 is a perspective view of mineral matter.

FIG. 7: Concentration change diagram when air supply means is provided upstream of the seawater purification module

FIG. 8 is a concentration change diagram when an air supply unit is provided downstream of the seawater purification module.

FIG. 9 is a block diagram of a conventional seawater purification device.

[Explanation of symbols]

 3 Sea Water Purification Unit 4 Water Pressure Feeding Means 5 Minerals 6 Sea Water Purification Module 7 Air Supply Means 10 Ultraviolet Irradiation Device

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location C02F 3/10 Z 6647-4D 3/20 Z 3/34 101 D 7158-4D

Claims (3)

[Claims] 1. A seawater sterilizing and purifying apparatus, in which a seawater purification module composed of a mineral substance containing a basic substance as a main component, an air supply means, and an ultraviolet irradiation device are sequentially arranged in a forced circulation passage for circulating water in a water tank. A seawater purification device that uses artificially cultured bacteria of seawater purification bacteria and a bacteria activator as a module. 2. The seawater purification apparatus according to claim 1, wherein artificial cultures of aerobic bacteria and anaerobic bacteria are used as bacteria, and a nonionic surfactant is used as a bacteria activating substance. 3. The mineral substance is a ceramic containing at least one selected from the group consisting of oxides of calcium or magnesium, silicates, aluminates, and carbonates, and its shape is cross-section touy and arcuate. The seawater purification device according to claim 1, which is curved and has a substantially constant size.