JPH10178966A - Water processor for breeding fish or the like - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a titled processor capable of processing organic nitrogen and nitrate nitrogen in water by executing a contact processing by a far infrared ray radiation ceramic material after processing the water of a water tank for breeding a fish kind or the like by sand filtering or the like and then returning it to the water tank. SOLUTION: For instance, this processor is provided with the water tank 1 for breeding the fish kind or the like, a pump 8 for circulation for drawing out the water of the water tank 1, a filtering device 6 for filtering suspended matters in source water 12 supplied by the pump 8 and turning it to pure water, a far infrared ray ceramic filtering cylinder 2 for performing a far infrared ray irradiation processing by far infrared ray ceramic to the pure water from the filtering device 6 and a device 9 for returning the water processed in the ceramic filtering cylinder 2 to the water tank 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water treatment apparatus for raising or ornamental fish or the like.

[0002]

2. Description of the Related Art As shown in FIG. 3, a basic flow sheet for water treatment in a breeding or ornamental aquarium for fish and the like is shown in FIG. 3, in which the water in the aquarium is sucked by a pump through a strainer and then a sand filter. Or, and through an activated carbon adsorption device or the like, the suspended matter in the water is removed, and highly toxic ammonia nitrogen dissolved in the water,
Microorganisms in the above-mentioned filtration device or activated carbon adsorption device have been oxidatively decomposed to less toxic nitrite nitrogen and further to nitrate nitrogen. The sand filter not only removes suspended substances in the water as described above, but also removes organic nitrogen in the water by the action of microorganisms attached to the surface of sand, etc., which is a filler filled in the sand filter. And further oxidatively decomposes to nitrite nitrogen and finally to nitrate nitrogen. Due to the above-mentioned action of the microorganisms in the aquarium, the amount of renewed water in the aquarium has been relatively small because ammoniacal nitrogen, which is highly toxic to fish in the aquarium, is decomposed into nitrate nitrogen, which is less toxic.

[0003]

As described above, the water in a conventional aquarium for breeding or ornamental fish or the like is filtered (clarified) by a sand filter or the like to ensure the transparency of the water as described above. The function and oxidative decomposition of ammonia nitrogen, which is highly toxic to fish, into nitrate nitrogen, which is less toxic, have the following problems. Organic nitrogen contained in water in the aquarium is oxidatively decomposed into ammonia nitrogen, nitrate nitrogen, etc. by the action of microorganisms, but at the start of breeding, the oxidation rate is slow, so the period during which ammonia nitrogen is present in the water is long thing. In addition, it takes time to change from organic nitrogen to less toxic nitrate nitrogen, and if water is circulated for a long time, nitrate nitrogen eventually accumulates in the water, A part of the water in the water tank must be periodically replaced with fresh water in order to keep the concentration of nitrate nitrogen in the water in the water tank below a certain value. And so on.

[0004]

SUMMARY OF THE INVENTION The present invention has been made by experimentally pursuing an economical solution to the above-mentioned conventional problems of a water treatment apparatus for breeding fish or the like for an ornamental aquarium. Its features and effects are aquarium, fish farm,
Water in a water tank for raising fish or appreciation in a restaurant or the like is subjected to contact treatment with a far-infrared radiation ceramic material after sand filtration, activated carbon adsorption, membrane filtration alone or a combination thereof, and then returned to the water tank again. Thereby, the organic nitrogen in the water, which is the above problem, is converted into ammonia nitrogen,
In addition to improving the rate of oxidation to nitrite and nitrate nitrogen, it also reduces nitrate nitrogen previously accumulated in water to nitrogen gas, so that the concentration of nitrate nitrogen can be maintained at a low level. became. As a result, the water in the aquarium, fish farm, restaurant or other aquarium for breeding or ornamental fish was conventionally continuously replaced with fresh water to dilute the dirt of the aquarium water. As a result, replenishment of fresh water can be greatly reduced,
Not only has the water management been simplified, but it has also been possible to save on the costs of the make-up water and of the wastewater generated at this time.

[0005]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example of the water treatment apparatus for breeding fish and the like according to the present invention will be described below with reference to the drawings. As shown in FIG. 1, the water treatment apparatus for breeding fish and the like of the present invention is supplied by a water tank (1) for breeding fish and the like, a circulation pump (8) for drawing water from the water tank, and the pump (8). A filtration device (6) for filtering suspended substances in the raw water (12) to produce clear water, a far-infrared ceramic filter tube (2) for subjecting the clarified water from the filtration device to far-infrared irradiation with a fast infrared ceramic, and After being processed by the ceramic filter tube, piping is provided so as to return to the aquarium (1) for breeding fish and the like. In the sand filter tube (6) in the water treatment apparatus for breeding fish and the like of the present invention, clogging of the filter medium occurs as the filtration proceeds. At that time, the filtration tank is washed with backwashing water (hereinafter, abbreviated as backwashing). The method is as follows as an example. (Refer to the dotted line in FIG. 1) The water in the water tank for storing the water for backwashing (hereinafter abbreviated as “backwash water tank (3)”) is pumped through the pump (8) and above the sand filter cylinder (6). To the filter tank (flow in the opposite direction to that of filtration) at a faster rate than during filtration, and while floating the filter media in the sand filter cylinder, remove suspended solids accumulated in the sand outside the filter cylinder. Is temporarily stored in a storage tank (7) for backwash drainage, and is discharged after treatment by a water treatment device for backwash drainage. Although not particularly described at the time of the above-mentioned backwashing, the valve of the flow path of the water for backwashing is set to “open”, and the valves of the other flow pipes are set to “closed”. Next, an experimental example of a system for treating fish and other breeding water of the present invention will be described. 1. Experimental Method A 50-liter filter tank was set in a 310-liter water tank, and two sets of this set were prepared. One set was provided with a ceramic filter tube, and the test section was used. The other section was used as a target section for performing conventional filtration. (Refer to the flow sheet in FIG. 1 and FIG. 2) The test fish is 22 to 25 cm, 140 to 180 g of Medina 5
They were reared individually by tail. Feeding was not performed for one week after the start of the experiment, and 8 to 16 g of frozen shrimp was given to both sections in the same amount while checking the condition one week later. If a dead fish occurred during the experiment, the number of the opposite group was adjusted so as to be the same. The ceramic filtration tank has a cylindrical shape with an inner diameter of 78 mm and a length of 250 mm and is filled with spherical ceramic balls having a diameter of 15 mm. FIG. 1 schematically shows the experimental apparatus. Ceramic is SiO
₂ , Al ₂ O ₃ as a main component, and calcium in addition. The water flow rate through the ceramic filter cylinder was 270 l.
/ Min, and the temperature of both water tanks is controlled at 20 to 25 ° C. 2. Experimental period The experimental period was defined as the time when nitrite, which was considered to have completely converted nitrogen into nitrate, was no longer detected in the rearing water.
From May 10, 1996 to June 28. 3. Experimental Results FIG. 2 shows the changes in the form of nitrogen. In particular, the following results are obtained from this figure. (1) Dissipation of ammonia nitrogen from breeding water Experimental plot 19 days Target plot 24 days (2) Dissipation of nitrite nitrogen from breeding water Experimental plot 37 days Target plot 49 days (3) Nitrate nitrogen reduction experiment Zone 29 days from the target zone The target zone did not occur The change in nitrogen content in the target zone was due to the conventional sand filtration aging rate of 2
It is considered to be an average ripening rate in terms of months. The maturation of the experimental plot is 5 days earlier than the target plot due to the disappearance of ammonia nitrogen, and 12 days earlier than the target plot due to the disappearance of nitrate nitrogen. One of the biggest problems when setting up a filter tank and starting breeding is to produce a large number of dead fish before the filter tank matures, and this problem can be solved by using a special ceramic. There is. The arrangement order of the ceramic filtration tube and the sand filtration tube, or the activated carbon adsorption tube, and the membrane filtration device may be arranged without being limited to this example.

[Brief description of the drawings]

FIG. 1 is a water treatment system of the present invention for breeding fish and the like.

FIG. 2 shows a conventional water treatment system for breeding fish and the like.

FIG. 3 Experimental device

Fig. 4 Daily change of nitrogen in breeding water

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water tank for breeding appreciation 2 Ceramic filter tube 6 Sand filter tube 10 Far infrared ceramic 11 Filter material (sand etc.)

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI C02F 1/28 C02F 1/30 1/30 1/44 A 1/44 B01D 35/02 C

Claims (4)

[Claims] The present invention relates to a water treatment apparatus for breeding fish in an aquarium, a fish farm, a restaurant, or the like, and for a water treatment apparatus in an ornamental aquarium. A water treatment device for breeding fish and the like, wherein the water is subjected to circulating contact treatment with a ceramic material. 2. The ammoniacal nitrogen in the breeding water is converted to nitrite nitrate nitrogen and the nitrite nitrogen is converted to nitrate nitrogen by contacting the breeding water for fish and the like with the ceramic material having the far-infrared radiation ability. For purifying breeding water for fish and the like, characterized by promoting the oxidation reaction of nitrocellulose and reducing nitrite nitrogen and nitrate nitrogen to nitrogen gas 3. A method for regenerating a ceramic material in a ceramic processing apparatus for breeding water for fish and the like, wherein the ceramic material is filled in a ceramic processing cylinder with water washing or ceramic for recovering a far-infrared radiation function of the ceramic material. A water treatment apparatus for raising water for fish and the like, wherein the water is taken out from the processing cylinder, washed and / or dried, fired and regenerated (heated and regenerated) in a high-temperature furnace, returned to the ceramic processing cylinder, and subjected to ceramic processing. 4. A water treatment apparatus for breeding fish and the like, wherein the ceramic treatment of the breeding water for fish and the like is performed by filtration and / or adsorption of activated carbon and / or membrane filtration prior to the ceramic treatment.