JP2001062474A - Antibacterial agent for merged treatment septic tank, its treatment method and merged treatment septic tank - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a combined wastewater treatment tank using an antibacterial agent for a combined treatment wastewater tank, which can sterilize domestic wastewater extremely well and can prevent a bad smell without replacing the antibacterial agent for a long time. SOLUTION: A combined treatment septic tank mainly containing an inorganic antibacterial agent obtained by ion-exchanging or carrying at least one antibacterial metal ion selected from silver, zinc and copper on an inorganic compound base material such as zeolite and Otani stone. Merged treatment septic tank which stores the antibacterial agent in the disinfection tank in the merged treatment septic tank.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antibacterial agent for a combined septic tank for disinfecting wastewater in a washing tank in a combined septic tank for purifying domestic wastewater, a method for treating the same, and a combined septic tank using the antibacterial agent. About.

[0002]

2. Description of the Related Art Pollution in rivers and lakes is mainly caused by domestic wastewater discharged from home cooking and washing machines. In areas where sewage is undeveloped, sewage flows directly into rivers and lakes, and consequently the pollution proceeds. The combined clarification tank has the same sewage treatment performance as sewage.

[0003] The combined treatment septic tank treats various domestic wastewater and night soil, and because of the environment of Japan, bacteria can easily propagate from high temperature and humidity in the combined treatment septic tank. It is easy to emit and may emit a bad smell.

In addition, these combined treatment septic tanks use a bactericide or an antibacterial agent to sterilize the propagated bacteria, but when used in a private house, apartment house, combined house, etc., their handling is safe. It is important that there is.

On the other hand, currently used bactericides or antibacterials for water treatment are chlorine and ozone treatments, organic aqueous solutions, and the like, and care must be taken when handling them. Also, antibacterial agents to be used are desired to be able to withstand use without being replaced for a long time.

[0006]

DISCLOSURE OF THE INVENTION The present inventors have conducted intensive studies in view of the above-mentioned problems, and found that a combined treatment containing an inorganic antibacterial agent was performed in a washing tank in a combined treatment purification tank for purifying domestic wastewater. The present inventors have found that the bacteria propagated by the antibacterial agent for the septic tank can be sterilized extremely well, and that the odor can be prevented without replacing the antibacterial agent for a long time, thereby completing the present invention.

[0007]

That is, the present invention relates to an antibacterial agent for a combined treatment septic tank characterized by mainly containing an inorganic antibacterial agent.

The above-mentioned inorganic antibacterial agent relates to the antibacterial agent for a combined treatment septic tank described above, wherein the inorganic compound base material carries at least one antibacterial metal ion selected from silver, zinc and copper. It is. Further, the inorganic antibacterial agent relates to the antibacterial agent for the combined treatment septic tank as described above, which comprises an antibacterial zeolite in which zeolite supports at least one antibacterial metal ion selected from silver, zinc and copper. is there.

[0009] The inorganic antibacterial agent is prepared by adding silver,
The present invention relates to the antibacterial agent for a combined treatment septic tank described above, wherein at least one kind of antibacterial metal ion selected from zinc and copper is ion-exchanged or carried. Further, the present invention relates to the above-mentioned antibacterial agent for a combined treatment septic tank, which is in the form of granules, spheres or pellets.

Further, the present invention relates to the antibacterial agent for a combined treatment septic tank described above, wherein an inorganic antibacterial agent is attached to the surface of a granular, spherical or pellet-shaped resin or an inorganic base material. In addition, the resin matrix is related to the antibacterial agent for a combined septic tank described above, wherein the antibacterial agent is a polyethylene pellet.

Further, the present invention provides a method for treating domestic wastewater by adding the antibacterial agent for a combined wastewater treatment tank described above to a cleaning tank in a combined wastewater treatment tank for purifying and burying domestic wastewater.
The present invention relates to a method for treating a combined treatment septic tank characterized by sterilizing bacteria mixed in domestic wastewater.

[0012] The present invention also relates to a merged wastewater treatment tank characterized in that the antibacterial agent for the merged wastewater treatment tank described above is accommodated in at least a cleaning tank of the merged wastewater treatment tank for purifying and treating domestic wastewater. It is related. Further, the present invention relates to the merged treatment septic tank described above, in which the antibacterial agent for the merged treatment septic tank is placed in a container or a bag to which drainage can sufficiently contact, and is contained in a cleaning tank.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The antibacterial agent for a combined treatment septic tank according to the present invention mainly contains an inorganic antibacterial agent. Such an inorganic antibacterial agent is an antibacterial inorganic substance obtained by ion-exchanging or carrying antibacterial metal ions on an inorganic compound base material.

The inorganic compound to be used as a base material is synthetic or natural zeolite, hydroxyapatite, phosphates such as aluminum phosphate and zirconium phosphate, zinc oxide, soluble glass, Oyaishi, and the like. Natural zeolites, Otani stone and the like.

The antibacterial metal ion is at least one metal ion selected from silver, zinc and copper, and is preferably a silver ion. The amount of the antibacterial metal ion carried in the inorganic antibacterial agent is 3 to 15% by weight, preferably 8 to 12% by weight as a metal. If the amount is less than 3 wt%, a sufficient antibacterial effect is not exhibited. If the amount exceeds 3 to 15 wt%, the antibacterial effect is saturated, which is not preferable in terms of economy.

It is preferable that the shape of the inorganic antibacterial is granular, spherical or pellet.

The inorganic antibacterial agent is preferably an antibacterial zeolite obtained by supporting the above antibacterial metal ion on zeolite as an inorganic compound base material. The zeolite having antibacterial properties is not particularly limited as long as it is industrially available, but an antibacterial metal ion having an antibacterial effect on an ion-exchangeable portion of a natural or synthetic zeolite made of aluminosilicate is used. One or more types are retained.

The natural or synthetic zeolite comprising the aluminosilicate as the base material is generally an aluminosilicate having a three-dimensional skeletal structure, and is generally xM _{2 / n} O.Al based on Al ₂ O _{3. 2} O ₃ · ySiO ₂ · zH ₂ O
It is represented by M represents an ion-exchangeable metal ion,
Usually, it is a monovalent to divalent metal, and n corresponds to this valence. On the other hand, x and y represent the number of moles of the metal oxide and silica, respectively, and z represents the number of crystallization water. Many different types of zeolites are known, such as the composition ratio, pore size, specific surface area, and the like. The zeolite substrate to be ion-exchanged preferably has a SiO ₂ / Al ₂ O ₃ molar ratio of 14 or less.

The zeolite of the substrate may be either natural or synthetic. For example, natural zeolite includes
Analcime _{(Analcime: SiO 2 / Al 2} O 3
= 3.6-5.6), Chabazite (Chabazit)
_{e: SiO 2 / Al 2 O} 3 = 3.2~6.0), clinoptilolite Petit light (Crinoptilolite: SiO ₂ /
Al ₂ O ₃ = 8.5 to 10.5), erionite (Eri
_{onite: SiO 2 / Al 2 O} 3 = 5.8~7.4),
Faujasite: SiO ₂ / Al ₂
O ₃ = 4.2 to 4.6), mordenite (Morden)
_{aite: SiO 2 / Al 2 O} 3 = 0.34~10.
0), Phillipsite (S)
iO ₂ / Al ₂ O ₃ = 2.6 to 4.4).

The synthetic zeolite is an A-type zeolite (SiO
₂ / Al ₂ O ₃ = 1.4 to 2.4), X-type zeolite (S
iO ₂ / Al ₂ O ₃ = 2 to 3), Y-type zeolite (SiO ₂
/ Al ₂ O ₃ = 3-6), mordenite (SiO ₂ / Al ₂
O ₃ = 9 to 10). The particle size is such that the specific surface area is 150 m ² / g or more and the average particle size is 0.1 to 10
It is about 0 μm, preferably 0.1 to 5 μm.

In the present invention, the cation in the inorganic compound represented by the natural or synthetic zeolite as the base material is easily contacted with an aqueous solution of a water-soluble salt of a metal having an antibacterial effect, for example, silver, copper or zinc. Ion exchange.

The antibacterial agent for the combined treatment septic tank of the present invention is obtained by ion-exchanging cations in the inorganic compound base material such as zeolite with antibacterial metal ions, or converting the antibacterial metal by physical means such as adsorption and mixing. The fine particles are mainly composed of a supported inorganic antibacterial agent, but may be formed by using an inorganic binder such as bentonite or an organic resin. The molding method is not particularly limited.

The antibacterial agent for the combined treatment septic tank is preferably in the form of granules, spheres or pellets.

As the antibacterial agent for the combined treatment septic tank of the present invention, it is preferable that the base material is made of Oya stone and the base particles carry antibacterial ions. Such an Oya stone can be manufactured very inexpensively and easily because the base material is to be treated as waste. For example, an antibacterial agent for a combined treatment septic tank molded using Oya stone as a base material has silver ions carried on the surface of the base material. Oya stone of the base material is clinoptilolite (Na) which is a kind of zeolite family.
₆ Al ₆ Si ₃₀ O ₇₂ • 24H ₂ O), and other crystalline minerals such as plagioclase and quartz, as well as other components such as humid celadonite, smectite montmorillonite and saponite. There is a massive part called “miso”, which is clayified and contains iron saponite as the main component.

The antibacterial agent for the combined treatment septic tank according to the present invention may be, for example, one in which an inorganic antibacterial agent is impregnated or adhered to or adhered to the surface of a molded granular, spherical or pellet resin base material. .

The antibacterial agent for the combined treatment septic tank of the present invention will be described with reference to the drawings. FIG. 1 is an enlarged schematic view showing an embodiment of an antibacterial agent for a combined septic tank according to the present invention. The antibacterial agent 1 for a combined septic tank comprises a spherical base material 2 and an inorganic antibacterial agent powder 3 attached to the entire surface of the base material 2. The base material 2 is made of a transparent plastic (synthetic resin) and has a diameter of about 3 to 5 mm. The inorganic antibacterial agent powder 3 is made of, for example, an antibacterial zeolite solid powder, has an average particle size of 2 μm, and a specific gravity of 2.1 to 2.2. The inorganic antibacterial agent powder 3 is attached at a ratio of about 3 g to 100 g of the base material 2.

The synthetic resin of the base material is preferably a thermoplastic resin. As the thermoplastic resin, for example, polyethylene,
Poly-α-olefin such as polypropylene, copolymer with other monomer containing at least α-olefin, polystyrene, methacrylic resin, styrene-acrylonitrile copolymer (AS resin), acrylonitrile-
Butadiene-styrene resin (ABS resin), polyvinyl chloride, fluorine resin, polyamide, polyimide, polycarbonate, polyacetal, thermoplastic polyester,
Cellulose acetate (cellulose resin), polysulfone thermoplastic polyimide, polyphenylene oxide, polybutylene ionomer resin, polyurethane resin and the like.

The above-mentioned inorganic antibacterial agent contained in the antibacterial agent for the combined treatment septic tank of the present invention is an inorganic compound having an antibacterial activity against Staphylococcus aureus and Escherichia coli, etc. Can be used for

That is, by putting the above-mentioned antibacterial agent for the combined treatment septic tank into the washing tank in the combined treatment septic tank for purifying and burying the domestic wastewater and treating the domestic wastewater, the bacteria mixed in the wastewater can be removed. Useful for sterilization.

FIG. 2 is a schematic view showing an embodiment of the merged and treated septic tank according to the present invention. The combined treatment septic tank of the present invention is a septic tank capable of treating both human waste and human waste together with gray water.

The structure of the merged treatment septic tank is basically determined by the Building Standards Law. As shown in FIG. 2, the solid matter of the domestic wastewater flowing into the septic tank is separated and the organic matter is removed by the action of anaerobic microorganisms. Two anaerobic filter tanks 11a, 11 that decompose
b, a blower 16 sends air, and aerobic microorganisms adhering to and growing on the contact material purify sewage passed through the anaerobic filter tank by the action of the aerobic microorganisms.
A sedimentation tank 13 for sedimenting and separating a mass of microorganisms having purified sewage as sludge, and a disinfection tank 14 for sterilizing wastewater of the supernatant of the sewage separated in the sedimentation tank 13. The wastewater that has been sterilized in the disinfection tank 14 is discharged.
The settling tank 13 and the disinfecting tank 14 are collectively referred to as a washing tank 15.

The present invention relates to a cleaning tank for a combined septic tank comprising the above-mentioned antibacterial agent for a combined septic tank containing the above-mentioned inorganic antibacterial agent.
5. Preferably, the bacteria, fungi, algae and the like contained in the supernatant of the sewage can be sterilized by being put in the disinfection tank 14.

According to the present invention, the antibacterial agent for the combined treatment septic tank is propagated in the combined treatment septic tank by placing the antibacterial agent in the combined treatment septic tank in a container or a bag so as to easily contact the wastewater. It is preferable to sterilize bacteria, fungi, algae and the like.

[0034]

The present invention will be described in more detail with reference to the following examples.

Production of Antibacterial Agent for Septic Tank Combined Treatment (Sample A) A large number of base materials (polyethylene pellets, average diameter 3 mm) are charged into a mixer, and the mixer is rotated at high speed. As a result, the base materials come into contact with each other, and the surfaces thereof generate heat and melt. When the surface of the base material is melted, an organic solvent as a melting accelerator, for example, toluene is charged into the mixer. Thereafter, an inorganic antibacterial agent powder (antibacterial zeolite: zeolite ion-exchanged with silver ions of 0.5% by weight: trade name, Cydaps Z, manufactured by Nippon Chemical Industry Co., Ltd.) is put into the mixer, and the mixer is again rotated at a high speed. As a result, the surface of each base material is melted and the inorganic antibacterial agent powder collides with the base material at a high speed. Antibacterial agent was obtained.

The antibacterial agent for the combined treatment septic tank has 3 g of 10.5 wt% silver ion-exchanged A-type zeolite supported on 100 g of molten polyethylene pellets as a base material, and has a trade name of Dragon (manufactured by Kimura Corporation). It is commercially available.

(Sample B) A silver nitrate solution (AgNO ₃ ) having a concentration of 3 wt% was accommodated in a holding tank, and the average diameter was 3 mm.
Was ground into a net-shaped case, and the case was immersed in a silver nitrate solution in a special tank. The supporting tank containing the silver nitrate solution was heated to 50 ° C. and immersed for 24 hours.

Next, the Otani stone was taken out of the supporting tank, washed with water, and then heated to evaporate water from the Otani stone. As a result, the silver ions are reduced to 0.
An antibacterial agent for a combined septic tank containing 5 wt% of Otani stone as a base material was obtained. In these, the surface of the base material is most impregnated with antibacterial metal ions.

Example 1 100 g of the sample A was put into a net-like molded body having water permeability, put into an initial concentration of Escherichia coli of 5.9 × 10 ⁵ / ml, shaken for 6 hours, and then checked for the number of sterilized cells. The sterilization was evaluated by the solution dilution method, and as a result, 99.9% was sterilized. Next, 100 g of the sample A was put in a container, placed in a disinfection tank of a combined treatment septic tank, and used in a normal household. One month later, no odor was generated in the disinfection tank.

Example 2 100 g of the sample B was placed in a reticulated molded body having water permeability, placed at an initial concentration of 5.9 × 10 ⁵ Escherichia coli / ml, shaken for 6 hours, and the number of sterilized cells was determined. The sterilization was evaluated by the solution dilution method, and as a result, 99.9% was sterilized. Next, 100 g of the sample B was put in a container, placed in a disinfection tank of a combined treatment septic tank, and used in a normal household. One month later, no odor was generated in the disinfection tank.

COMPARATIVE EXAMPLE 1 As a result of using for one month in a normal household without putting anything in the disinfection tank of the combined treatment septic tank, an odor was generated from the disinfection tank.

[0042]

As described above, according to the present invention, in the washing tank in the combined treatment septic tank for purifying domestic wastewater, bacteria that have propagated with the antibacterial agent for the combined treatment septic tank containing an inorganic antibacterial agent are removed. An effect is obtained in which sterilization can be performed extremely well and an odor can be prevented without replacing the antibacterial agent for a long time.

[Brief description of the drawings]

FIG. 1 is an enlarged schematic view showing an embodiment of an antibacterial agent for a combined septic tank according to the present invention.

FIG. 2 is a schematic view showing one embodiment of the merged disposal septic tank according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Antibacterial agent for combined treatment septic tank 2 Base material 3 Inorganic antibacterial agent powder not yet 11a, 11b Anaerobic filter bed tank 12 Contact tank 13 Sedimentation tank 14 Disinfection tank 15 Cleaning tank 16 Blower

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) C02F 1/50 540 C02F 1/50 540E 540F (72) Inventor Muneo Mita 9-11 Kameido, Koto-ku, Tokyo No. 1 Nippon Kagaku Kogyo Co., Ltd. Research and Development Division (72) Inventor Fumio Takizawa 12-1 Kami-Nara-cho, Kanuma-shi, Tochigi Pref. F-term (reference) 4D027 AB07

Claims (10)

[Claims] 1. An antibacterial agent for a combined septic tank, which mainly contains an inorganic antibacterial agent. 2. The combined treatment septic tank according to claim 1, wherein the inorganic antibacterial agent is obtained by ion-exchanging or carrying at least one antibacterial metal ion selected from silver, zinc and copper on an inorganic compound base material. Antibacterial agent. 3. The inorganic antibacterial agent comprises zeolite with silver,
The antibacterial agent for a combined treatment septic tank according to claim 1 or 2, comprising an antibacterial zeolite obtained by ion exchange or carrying at least one antibacterial metal ion selected from zinc and copper. 4. The combined treatment septic tank according to claim 1, wherein the inorganic antibacterial agent is obtained by ion-exchanging or carrying at least one kind of antibacterial metal ion selected from silver, zinc and copper on the valley stone. Antibacterial agent. 5. The antibacterial agent for a combined treatment septic tank according to claim 1, which is in the form of granules, spheres or pellets. 6. The antibacterial agent for a combined treatment septic tank according to any one of claims 1 to 5, wherein an inorganic antibacterial agent is attached to the surface of a granular, spherical or pellet-shaped resin base material. 7. The antibacterial agent for a combined treatment septic tank according to claim 6, wherein the resin base material is a polyethylene pellet. 8. An antibacterial agent for merged treatment septic tank according to any one of claims 1 to 7 is placed in a washing tank in a merged treatment septic tank for purifying and burying domestic wastewater, and the domestic wastewater is treated. A treatment method for a combined treatment septic tank that specializes in sterilizing bacteria mixed in domestic wastewater. 9. A merger wherein the antibacterial agent for a merger treatment septic tank according to any one of claims 1 to 7 is accommodated in at least a cleaning tank in a merger treatment septic tank for purifying and burying domestic wastewater. Disposal septic tank. 10. The merged and treated septic tank according to claim 9, wherein the antibacterial agent for the merged and treated septic tank is placed in a container or a bag to which drainage can sufficiently contact, and stored in a washing tank.