JP2003219871A - Microorganism carrier treated with organic acids such as pyroligneous acid and bamboo pyroligneous acid - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a microorganism carrier made from a polyolefin-based resin containing a charcoal powder, a porous inorganic material or an inorganic material having a large specific surface area, and enabling microorganisms to be excellently implanted or proliferated. <P>SOLUTION: This microorganism carrier is a polyolefin-based resin molded product containing the charcoal powder, the porous inorganic material or the inorganic material having the large specific surface area. The carrier is obtained by treating a resin molded product with organic acids such as a pyroligneous acid, a bamboo pyroligneous acid and a combined organic acid to attach components included in the organic acids to the carrier, the fine pores of the inorganic material included therein or the surface with fine unevenness. The carrier promotes the regulation of pH and the activation of the microorganisms by obtaining water when used to promote the implantation or proliferation of the microorganisms on the carrier. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a water treatment or a gas treatment in which a carbon powder and a polyolefin resin molded product containing a porous or multi-specific surface area inorganic substance are treated with organic acids such as wood vinegar and bamboo vinegar. The present invention relates to a microorganism carrier.

[0002]

2. Description of the Related Art The carrier treatment method / technical manual (1994 version) of the New Sewerage Technology Promotion Foundation introduces the definition and treatment method of carriers, most of which are synthetic organic with a size of 3 to 20 mm. It is described as a polymer.

The material is a material that is not toxic to biological organisms,
Since it is not degradable by microorganisms and has excellent durability and corrosion resistance, it is particularly desirable that the carrier used in the binding immobilization method has a large specific surface area and facilitates binding with microorganisms. Various materials and shapes are introduced.

Regarding such materials, shapes, foam molding, etc., Japanese Patent Laid-Open No. 128542/1974 and Japanese Patent No.
No. 31147 and published patent application No. 56-89897. Further, in these, an inorganic filler is described as a hydrophilic filler or as a specific gravity adjusting material together with activated carbon and the like.

Many of these are aimed at accelerating (adhering) or adhering (bonding) the microorganisms to the microorganism carrier to prevent the microorganisms from coming off. JP 2001-1
In 97885 (P2001-197885A), an example in which a porous inorganic substance (charcoal, zeolite, etc.) is added is disclosed, but it is considered that the method is similar to the previous example.

However, it cannot be said that these conventional techniques are sufficient for achieving the intended purpose. For example, when the speed and certainty are required in the implantation of the microorganism on the carrier and the growth thereof, the polyolefin-based carrier is supported. The body is not enough.

[0007] In particular, when a porous or multi-specific surface area inorganic substance is added, depending on the type of inorganic substance, there are many substances that exhibit alkalinity (charcoal (medium-high temperature carbonization), bamboo charcoal, zeolite, barium sulfate, etc.), and most of the microorganisms are weak. There is a problem that the implantation and growth of microorganisms will be delayed unless pH is adjusted because there are many substances that are acidic and neutral and that are activated and proliferatively active.

[0008]

In order to solve such problems, the pH is adjusted according to the porous material or the inorganic material having a large specific surface area and the substance for activating microorganisms is attached to the carrier. , It aims to make the implantation and growth of microorganisms more reliable.

[0009]

Means for Solving the Problems A microbial carrier of a polyolefin resin to which a porous or multi-specific surface area inorganic material is added is immersed in water for 120 hours or more, and the pH of an aqueous solution in which the inorganic material component is eluted is measured. According to the degree of alkalinity, the pH of the aqueous solution is adjusted with a wood vinegar solution, a bamboo vinegar solution, a complex organic acid, etc., which mainly consist of organic acids, and the numerical value at which the solution becomes neutral or weakly acidic is calculated.

According to this, the pH of the microorganism carrier of the polyolefin resin to which the porous material or the inorganic material having a high specific surface area is added is adjusted with the organic acid prepared from the stock solution of the organic acid to the 200-fold solution.

When the measured value is already neutral or weakly acidic, it is immersed in a 300- to 2000-fold solution of the organic acids, and the components (excluding water and volatile components) possessed by the respective organic acids. Substance) to the microbial carrier,
The substance component tries to activate the microorganism.

[0012] As a characteristic of these organic acids, it has been reported in the previous publication that there is an effect of sterilizing or inhibiting the growth of microorganisms in a 100- to 130-fold solution from a stock solution and an activating effect of a microorganism in a 200- to 10,000-fold solution. Pesticide reduction with charcoal, dictionary of charcoal / wood vinegar usage, supervised by Sadakichi Kishimoto) Based on documents and materials of wood vinegar, the difference in effect has been confirmed by examples and experiments. It has been found that the numerical values differ depending on the situation, and that the magnification must be changed. Further, as a means for impregnating the organic acid component, there is a room temperature or warm organic acid immersion method, or an organic acid immersion method during extrusion molding.

In the previous method, the organic acid solution of a calculated magnification is immersed for 96 to 120 hours or more at room temperature at room temperature. As a result of the experiment, the pores of the microorganism carrier are permeated with the organic acid in 24 to 48 hours. This is because 96 to 120 hours are required to penetrate the fine pores of the porous inorganic material. If the liquid is heated, the immersion time is shortened depending on the temperature and the like.

In the latter method, the product is immersed in an organic acid solution having a concentration of 2 to 5 times higher than that calculated immediately after extrusion molding. By these methods, the organic acids are permeated not only into the pores of the microorganism carrier but also into the fine pores of the porous inorganic material and the fine irregularities of the multi-specific surface area inorganic material, and the components thereof are attached.

Even with such an attachment method, wood vinegar solution,
Bamboo vinegar, complex organic acids, etc., contain many components that act as penetrants. The ingredients such as bamboo vinegar, complex organic acid, etc. are permeated and dried to be baked and attached to the pores of the microorganism carrier, the fine pores of the contained substance and the surface or cavity of the microorganism carrier.

At the stage of use, these obtain water again to act as pH control by the impregnating component and at the same time promote the activation of microorganisms. As for the material and shape of the microorganism carrier, those introduced in the published method of carrier utilization and technology manual (1994 version) of the Sewerage New Technology Promotion Organization are sufficient.

That is, it is desirable that a polyolefin resin having a spherical shape, a cylindrical shape, a hollow cylindrical shape, a cubic shape, a rectangular parallelepiped shape, or the like is added with a porous or multi-specific surface area inorganic material, and the surface is roughened by foaming to have a large specific surface area.

[0018]

BEST MODE FOR CARRYING OUT THE INVENTION Next, embodiments of the present invention will be described with reference to experimental results. Examples are as shown in Tables 1 to 3, but the raw materials and processing conditions used here will be described. The microbial carrier is a polyolefin resin,
That is, polypropylene and polyethylene were used, and the shape and the standard size were a cylindrical microorganism having a diameter of 6.5 to 7 mm and a length of 7 mm, and the surface was uneven due to foaming or the like. Sankyo Kasei Co., Ltd.) was used.

This is effective for roughening the surface of the molded product having continuous foamed pores, through-foamed pores, etc., and plays an important role of increasing the specific surface area of the microorganism carrier.

Next, regarding the porous inorganic substance as an additive, first, charcoal powder of cypress 40% cedar 40% pine 20% was used as charcoal powder, and the average particle diameter was 2 to 8 microns.
.About.20 micron was used, and zeolite or silica was used as the porous or high specific surface area inorganic substance. The organic acids to be impregnated were those obtained by distilling and refining commercially available wood vinegar and bamboo vinegar. In the case of wood vinegar or bamboo vinegar, the condition is that the raw wood of charcoal or raw bamboo has a clear history and no harmful substances are contained. It is unsuitable for construction waste materials, those that have undergone some processing such as painting, those that have been immersed in seawater, and those that contain toxic trees (such as cous, acebi, and curare) in the raw materials.

It is known in the literature that the components of wood vinegar and bamboo vinegar differ depending on the carbonization method or the type of tree.
The proportions of components such as organic acids are different between the charcoal kiln method and the methods such as carbonization furnace, open hearth, etc. Among the components said to be more than 200 kinds in the literature, the main components are acids such as acetic acid, formic acid, butyric acid, propionic acid, alcohols such as methanol, Butanol, amyl alcohol, and other neutral substances such as acetone, valerolactone, and maltol, aldehydes such as formaldehyde and furfural, and phenols such as cresol, guaiacol, and eugenol are basic substances such as ammonia, methylamine, and pyridine. Especially, it is necessary to dilute the wood vinegar while paying attention to the components such as acids, aldehydes and phenols.

In the case of bamboo vinegar, strong acid such as formic acid is also increased, so that it is necessary to consider when diluting.

The complex organic acid is a mixture of rice vinegar, apple vinegar, persimmon vinegar, plum vinegar, citric acid, malic acid, high-fructose corn syrup, soybean oligosaccharide, honey, vitamins, natural minerals, etc., 50 to 2000 times. Used at a dilution of.

Next, regarding the processing method, the microbial carrier was molded by a 40 mm hollow extrusion molding machine. The standard was a cylindrical hollow foam having a diameter of 6.5 to 7 mm and a length of 7 mm. In the examples, for comparison, the shape, foamed state,
Same standards as size.

Although the means for impregnating the organic acids has already been described, the specific method is calculated based on the ph value measured in the plastic container for immersion as shown in FIG. 2, and the diluted organic acid solution (wood vinegar is used). Liquid, bamboo vinegar, complex organic acid, etc.), and a metal mesh part that functions as a pressing lid is provided about 10 cm below the water surface of the liquid, and a molded product for a microbial carrier that has already been molded is made of a polyester or polyolefin acid. Put it in a strong mesh bag,
Cover with a net and soak for a predetermined time.

At first, since air and gas are adsorbed in the pores of the molded product and the fine pores of the porous inorganic material, a considerable buoyancy is exerted. However, with the passage of time, the force becomes weaker and slightly sinks or floats near the surface of the water.

This point is a guideline for the minimum immersion time. Also, note that this time varies depending on the components of organic acids. After the completion of the immersion, the net bag is pulled up, the drop is cut off, and dried with warm air at 40 to 80 degrees.

Further, in the method of dipping at the time of molding, as shown in FIG. 3, the molding melt discharged from the die of the extruder is 2 to 5 times as much as the calculated dilution ratio, and contains a concentrated organic acid solution. Enter the stainless steel cooling layer. Since the temperature at the time of water entry is about 230 to 240 degrees, the penetration of the liquid is very fast.

The organic acid solution is circulated, and the cooling layer temperature is set to 25 to 60 depending on the amount of liquid in a circulation tank provided separately (the temperature decreases when the amount increases, the temperature increases when the amount decreases) or a heat source.
Adjust and maintain according to the situation within a range of degrees. After that, a molded product for a microbial support is formed in the steps of warm air drying and cutter.

[Table 1]

[Table 2]

[Table 3]

Examples 1 to 5 are examples in which charcoal powder was used as the inorganic substance. For comparison, 1 is not treated with organic acids. Those that have been treated have very good results.

Examples 6 to 10 are examples in which bamboo charcoal powder is used as an inorganic material. 6 is a comparative example, which is not treated with organic acids. Those treated have very good results in a situation close to wood vinegar. Bamboo vinegar is diluted to a thinner volume than wood vinegar.

Examples 11 to 15 are examples in which zeolite is used as the inorganic material. Reference numeral 11 is a comparative example, which is not treated with organic acids. In general, those that have been processed also have good results.

Examples 16 to 20 are examples in which silica is used as the inorganic material. 16 is a comparative example, which is not treated with organic acids. In general, those that have been processed also have good results.

In Example 21, as a comparative example, no inorganic substance was added and no organic acid treatment was carried out.

The additives and additives shown in the above examples are not limited to these. For example, in the case of charcoal powder, charcoal, bamboo charcoal, coconut charcoal, chaff charcoal, various activated charcoal, etc. It should be clear if it is clear and does not contain harmful substances.

In addition to zeolite and silica, porous or polyspecific surface area inorganic substances such as kaolin, clay, barium sulfate, aluminum hydroxide, diatomaceous earth, alumina, talc, mica, sepiolite and smectite are not easily attacked by acids and are porous or Specific surface area (4 m ² / g to 3000 m ²
Any inorganic material having a large / g) may be used.

The wood vinegar solution and the bamboo vinegar solution may be substances that do not contain harmful substances and have a clear history, but it is easier to use if the contents of the ingredients are known.

The foaming agent may be another inorganic or organic foaming agent as long as it has a large specific surface area due to continuous foaming pores and pores.

As a method of immersing the organic acids, the microbial carrier may be placed in a decompression container, and after decompression, the organic acid solution may be placed and immersed.

[0040]

INDUSTRIAL APPLICABILITY The present invention provides a microbial carrier made of a polyolefin foamed resin molded product containing carbon powder and a porous or multi-specific surface area inorganic substance, and has organic acids such as wood vinegar solution, bamboo vinegar solution and complex organic acid. By permeating and impregnating the air bubbles and uneven surface of the microbial carrier, as well as the fine pores and the complex fine surface of the contained inorganic substances such as carbon powder, the pH of the components and the activation of the microorganisms can be greatly enhanced by the action of the components. It is clear from the examples that the promotion and improvement of the implantation of the microorganisms on the carrier or the improvement of the growth of the microorganisms and a more reliable effect were obtained by the examples, and the present invention could not be achieved by the conventional carrier alone. Think of the effect.

[Brief description of drawings]

FIG. 1 is a perspective view of a microbial carrier used in the present invention and examples.

FIG. 2 is a diagram of immersion of a microbial carrier in an organic acid by an immersion method after molding in the present invention and examples.

FIG. 3 is a process diagram of immersing a microbial carrier in an organic acid by an immersing method immediately after extrusion in the present invention and examples.

[Explanation of symbols]

1 Microorganism carrier 2 Immersion container 3 Water surface of organic acid solution 4 Wire mesh that functions as a push lid 5 Wood vinegar, bamboo vinegar, organic acid solutions such as complex organic acids 6 Net bag containing microorganism carrier 7 Extruder 8 Extruder die 9 Circulation tank (container) 10 Pumps for sending solutions 11 Waste liquid pipe 1 (for overflow) 12 Waste liquid pipe 2 (for adjusting the liquid amount in the aquarium) 13 Solution supply pipe 14 Collection roll 15 cutter

   ─────────────────────────────────────────────────── ─── Continued front page    F term (reference) 4B033 NA11 NB33 NC06 NC12 ND01                       ND20                 4D003 EA15 EA19 EA22 EA24 EA25                       EA30 EA38

Claims (4)

[Claims] 1. A microorganism carrier comprising a polyolefin resin molded product containing carbon powder, which is treated with an organic acid such as a wood vinegar solution, a bamboo vinegar solution, and a complex organic acid. 2. A microbial carrier obtained by treating a polyolefin resin molded product containing a porous or multi-specific surface area inorganic substance with an organic acid such as a wood vinegar solution, a bamboo vinegar solution, and a composite organic acid. 3. A microorganism-supported product obtained by treating a polyolefin resin molded product containing carbon powder and a porous or multi-specific surface area inorganic substance with an organic acid such as a wood vinegar solution, a bamboo vinegar solution, or a complex organic acid. body. 4. A wood vinegar solution, a bamboo vinegar solution, a composite organic acid, wherein the molded product is foamed and the surface is roughened to increase the specific surface area. A microbial carrier obtained by treating with an organic acid such as.