JPH0312299A - Water purifying apparatus - Google Patents

Abstract

PURPOSE:To effectively remove ammonia or contaminant generated in water tank by constituting a water purifying apparatus by arranging a nitration module consisting of a filter material and a mineral substance and a denitrification module to the water recirculation passage of a water tank at predetermined positions. CONSTITUTION:The sewage accumulated at the center of the bottom part of a water tank 2 enters a filter apparatus 6 from an inflow port 4 by a pump 5 through a water flow passage 3a and a large contaminant is removed by a filter material 7. Next, the sewage enters a nitration module 9 packed with a mineral substance 8 and ammonia generated by the decomposition of org. matter is oxidized and decomposed by the aerobic bacteria group adhered to the surface of the mineral substance to form nitrate. The sewage further enters a dinitrification module 10 and nitrate is decomposed to nitrogen and water by the anaerobic bacteria group adhered to the mineral substance 8. By this method, sewage is purified and purified water returns to the water tank 2 through a water flow passage 3b.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a water purification device for domestic or commercial use that purifies water such as aquarium water not intended for viewing, water for fish cultivation, bath water, or pool water.

Conventional technology For example, in the case of aquarium water that is not intended for viewing, ammonia and dirt are generated in the water in the aquarium due to the metabolic effects of fish, decomposition of uneaten food, and excrement.

Problems to be Solved by the Invention Due to the generation of ammonia, fish develop lesions on their gills, which causes a decrease in the fish's ability to take in oxygen, and also promotes the infiltration of bacteria onto the surface of the gills, causing damage to the fish's gills. became more susceptible to illness.

The present invention solves such conventional problems and aims to remove ammonia and dirt generated in an aquarium.

Means for Solving the Problems In order to solve the above problems, the water purification device of the present invention has a configuration in which a nitrification module and a denitrification module made of a filter material and mineral substances are arranged in a circulation flow path.

Function: With the above-described configuration, the present invention first removes dirt caused by fish excrement etc. with the i-filtration material, and then removes the metabolic effects of the fish by the aerobic microorganisms attached in a film form to the surface of the mineral substance in the nitrification module. The ammonia generated by the decomposition of minerals and organic matter is oxidized to nitrate, and the nitrate is decomposed into nitrogen and water by the anaerobic microorganisms attached to the surface of the mineral material in the next denitrification module. You can obtain clean water that is free from contamination from excrement and excrement.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. FIG. 1 shows an embodiment in which the water purification device of the present invention is applied to an aquarium that is not intended for viewing. The water purification device 1 was placed between the water circulation channels 3a and 3b of the water tank 2.

The aquarium 2 has a taper on the bottom so that fish excrement, uneaten food, etc. are collected in the center of the bottom. The dirty water accumulated in the center of the bottom enters the furnace treatment device 6 by the pump 5 via the water flow path (outward path) 3a from the inlet 4, and large stains are removed by the overfill 7 disposed inside. Next, it enters a nitrification module 9 filled with minerals 18, and the aerobic microorganisms attached to the surface of the minerals oxidize and decompose ammonia generated by fish metabolism and the decomposition of organic matter into nitrates. Further, the nitrate enters the denitrification module 10 filled with the mineral f8 and is decomposed into nitrogen and water by the anaerobic microorganism group attached to the surface of the mineral substance 8. In this way, dirt, ammonia, etc. that form in the aquarium are removed by filter media, or oxidized and decomposed by microorganisms living on the surface of mineral materials, resulting in clean water, and the water flow path ( Return trip) Return to water tank 2 via 3b.

On the other hand, the inside of the water tank 2 is constantly aerated by the air pump 11, and this air promotes the oxidative decomposition of organic matter by the aerobic microorganisms of the nitrification module 9. Further, since the denitrification module 10 is located downstream of the nitrification module 9, it is not affected by air, and the anaerobic microorganisms therein actively decompose nitrate into nitrogen and water.

Mineral substance 8 is a substance containing at least one selected from the group of calcium or magnesium silicates, aluminates, oxides, hydroxides, and carbonates, and specifically includes zeolite, dolomite, or These include orinite, bentonite, chinastone, limestone, magnesite, magnesia, magnesium silicate, and diatomaceous earth. These mineral substances 8 are used by being filled into a container such as a bag.

FIG. 2 shows one embodiment of the filtration filter 7 of the present invention. f The general filter 7 has a cylindrical core 1 with water flow properties.
A plurality of layers of fiber bundles 14 are wound around the cylindrical core 13.
It forms countless long, curved water channels.

Further, the fiber bundle 14 has a condensed structure in which a plurality of short fiber yarns with a large amount of fluff are twisted, and voids 16 are formed by giving regularity to the first overlap 15 of this fiber bundle.

The material of the fiber bundle 14 is one or more selected from the group of polypropylene, cotton, polyester, acrylic, rayon, cellulose, and nylon, and polypropylene with excellent durability is preferable.The pore size of the furnace-use filter 7 is as follows: It is 1 to 150 μm.

This is because this pore size removes dirt best. On the other hand, the higher the porosity, the better water will flow through it, but it was set at 20 to 50% in consideration of the material strength structure. In addition, the single-house filter may be a plate-shaped filter in which a ceramic porous material with a small pore diameter is laminated on the upstream side and a ceramic porous material with a large pore diameter on the downstream side, or a filter may be used in combination. Good, these I filters are used in the upstream of the mineral substance 8 to remove large contaminants in the water, so only water containing ammonia and organic particles goes to the downstream, so the midstream The mineral material 8 to which the aerobic microorganisms of the nitrification module 9 are attached efficiently oxidizes and decomposes ammonia from nitrite to nitrate without becoming clogged with large dirt, and the mineral material 8 to which the anaerobic microorganisms of the denitrification module downstream are attached. 8 can also efficiently decompose nitrates into nitrogen and water without clogging with dirt.

Next, the above-mentioned aquarium for ornamental fish? A nitrification module and a denitrification module made of single-purpose filter mineral materials were installed to evaluate the effectiveness of the present invention.

This fish tank is made of Agril resin with an internal volume of 100 mm, and has a taper of 22.5 at the bottom, making it easier to remove dirt that collects at the bottom and out of the front tank. Inside the aquarium, there is a diffuser tube 12 made of porcelain (average pore diameter approximately 400 μm), which is widely used as an air pump system.
The temperature was kept at 27＠±1°C using the air pump 10, the air pump heater 17, and the thermostat. The filtration filter in the filtration device is
Multiple layers of fluffy short fiber bundles made of polypropylene are wound around a cylindrical core to create a pore diameter of 1 to 150 μm.
I used the one that I made.

Furthermore, the nitrification module and denitrification module are cylindrical acrylic resin modules with an internal volume of 42 cm, and inside are saddle-lock type ceramics made from blast furnace granulation to immobilize aerobic microbial groups and anaerobic microbial groups. Used on the floor. This granulated blast furnace is produced by rapidly cooling 0.5 tons of slag generated per ton of molten iron from blast furnaces in steel plants, and is mainly used as a raw material for cement and as a soil improvement material. Blast furnace granulation is a porous glass award, with CaOlS as shown in the table.
The main components are MgO, Altos, and MgO.
It also contains FeO.

Table Composition of blast furnace granulated water (%) The above water purification device was attached to the circulation flow path of the non-aquarium tank as shown in Figure 1, and the water in the tank 1001 was heated to 27±1”C.
I made it. The turbidity of the water and the NHx, N
The results of measuring the amount of NO3 are shown in Figures 3 and 4. From Figure 3, it can be seen that when the filter of the present invention is used, the water in the aquarium is always very clean with a turbidity of about 0.5. However, if a filter is not used, the turbidity will increase and the water will quickly become dirty.From Figure 4,
When using the nitrification module and denitrification module of the present invention, the amount of NH3 in the aquarium water is always below o, osppm, and the
The amount of O□ is also less than O,tpp-, and NO! The amount also did not increase beyond the concentration spp■ of the raw water.

On the other hand, if the nitrification module and denitrification module of the present invention were not used, NH3 and No in the water would rapidly increase, and the tropical fish would die within -weeks.

As described below, the present invention first removes dirt of 1 μm or more in the aquarium using the upstream filtration filter, and removes NH generated due to the metabolic effects of fish, decomposition of leftover food, and excreta.
is oxidized and decomposed from Not to No by a group of aerobic microorganisms attached to the surface of the mineral in the middle block nitrification module, and NO3 is further attached to the surface of the mineral in the downstream denitrification module. The anaerobic microorganisms decompose it into N2 and water, so you can always have clean water and keep fish for a long time without having to replace the water in your aquarium.

Effects of the Invention As mentioned above, the water purification device of the present invention has a structure in which a filtration filter and a nitrification module and a denitrification module made of minerals are arranged in the water circulation path of the aquarium, so that dirt of 1 μm or more in the aquarium can be removed. NH, which is removed by the first filter and generated due to the metabolic effects of fish and the decomposition and excretion of uneaten food, is oxidized and decomposed from NO8 to NO3 in the nitrification module, and then NOx is converted to N in the denitrification module. Since it decomposes into water, you can always have clean water without turbidity or odor without having to replace the water in your aquarium, so you can keep fish for a long time without having to replace the water in your aquarium.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a water purification device according to an embodiment of the present invention applied to an aquarium for breeding ornamental fish, Fig. 2 is an enlarged sectional view of a furnace material used in the same device, and Figs. 3 and 4 are the same. FIG. 3 is a characteristic diagram of the device.

Claims (4)

[Claims] (1) A water purification device in which a nitrification module and a denitrification module made of filter media and minerals are placed in the water circulation path of the aquarium. (2) The water purification device according to claim 1, wherein the filter medium is arranged upstream, the nitrification module is arranged midstream, and the denitrification module is arranged downstream. (3) The minerals are CaO, SiO_2, Al_2O_3
2. The water purification device according to claim 1, wherein the main components are , MgO, and FeO. (4) The water purification device according to claim 1, wherein a filter material having a pore diameter of 1 to 150 μm is provided in the circulation channel. (5) The water purification device according to claim 1, wherein a bubble generator and a heater are installed in the water tank.