JP2015231351A - Bag-shaped microbial preparation in which sulfur bacteria are carried, and environmental purification method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a microbial preparation used for purification of water quality, decomposition of sludge, soil improvement or the like which does not require a large-scale apparatus, has excellent dispersibility and can be used simply and quickly, and in which sulfur bacteria are carried stably so as to exert purification capability.SOLUTION: There is provided a powdery microbial preparation in which a carrier containing neutral porous particles having a particle size of 50 μm or less by 70 vol.% or more is allowed to carry sulfur bacteria. Further, there is also provided a bag-shaped microbial preparation in which silica sand and white sand are mixed into the powdery microbial preparation, and which is encapsulated into a bag having water permeability.

Description

  The present invention relates to a microbial preparation and a bag-shaped microbial preparation used for water purification, sludge modification, and the like, and an environmental purification method using them. This microbial preparation uses porous particles carrying sulfur bacteria and having a small particle size as a microbial carrier.

  Conventionally, various techniques have been developed as methods for purifying water quality such as rivers and lakes. For example, treatment methods using microorganisms that exhibit purification ability by various metabolisms are known.

  The treatment method using microorganisms that have been used in the past has been confirmed to have a certain level of water purification effect, but it does not cause bad odors or sludge such as ammonia, hydrogen sulfide, mercaptans, etc. The effect on the causative substance is not sufficient. This is because even if it is a treatment method using microorganisms, the effect is completely different depending on which treatment method selectively propagates microorganisms. As elements important for purification by microorganisms, carbon (C), hydrogen (H), oxygen (O), nitrogen (N), and phosphorus (P) have a large ratio as biological constituents. In many cases, various aerobic and anaerobic bacteria for removing nitrogen and phosphorus have been studied for removal of carbon, which is the main element of organic matter, and for advanced purification. Sometimes it is not enough.

  In order to perform further advanced purification that could not be achieved in the past, there is a method of utilizing bacteria capable of metabolizing and detoxifying substances containing sulfur (S) as an element. Sulfur bacteria are known as such bacteria that metabolize sulfur. For example, Patent Documents 1 to 3 are disclosed as water purification technologies using sulfur bacteria. The technique disclosed in Patent Document 1 includes a step of oxidizing an organic substance in wastewater by a sulfate-reducing bacterium while heating it with a heat exchanger in a sulfate reduction reaction tank and reducing sulfate ions and sulfur, and a sulfur denitrification tank. A step of denitrifying reduced sulfur with a sulfur denitrifying bacterium, a step of nitrifying with a nitrifying bacterium in a nitrifying tank, a step of solid-liquid separating the remainder and discharging the supernatant, and the sulfate reduction reaction tank Introducing hydrogen sulfide contained in the exhaust gas into a sulfur oxidation tank, oxidizing the hydrogen sulfide by sulfur-oxidizing bacteria in the sulfur oxidation tank while heating with a water vapor source, and producing the sulfuric acid And adjusting the pH of the solution in the tank, and then refluxing sulfate ions required for the sulfate reduction reaction to the sulfate reduction reaction tank. Moreover, the technique disclosed in Patent Document 2 is similar to that of Patent Document 1 although it differs with respect to the presence or absence of a heat exchanger, the presence or absence of heating with water vapor, and the like. In addition, the technique disclosed in Patent Document 3 differs from the technique disclosed in Patent Document 1 in the presence or absence of carbon dioxide, the presence or absence of a heat exchanger, the clear regulation of the sedimentation tank, etc., but uses sulfur bacteria or the like. This technology is similar in that it has configurations such as sulfur reduction, sulfur denitrification, nitrification, solid-liquid separation, and exhaust gas treatment.

  Moreover, when using microorganisms, a fixed bed type purification method in which microorganisms are supported on a carrier is known. Various carriers are known. For example, Patent Document 4 uses a fly ash type porous ceramic, Patent Document 5 uses a gel carrier using PVA, Patent Document 5 6 discloses a method using coconut shells.

JP 05-234322 A JP 05-228493 A Japanese Patent Laid-Open No. 05-115897 JP 11-292654 A Japanese Patent No. 3241950 JP 09-75971 A

  The techniques disclosed in Patent Documents 1 to 3 all require a large-scale device, and it is difficult to easily and quickly disassemble sludge or the like that has been difficult to process. In addition, any of the techniques disclosed in Patent Documents 4 to 6 characterized by a carrier for microorganisms has a very limited use environment and is poorly dispersible for use in ponds and seas that require purification over a wide area. There were problems such as. In addition, when used as a carrier for sulfur bacteria, the sulfur bacteria are difficult to be supported, difficult to grow, or die, and thus have low fixability. Under such circumstances, the present invention provides a microbial preparation on which sulfur bacteria are supported so that they can be used easily and quickly with excellent dispersibility and stably purify without requiring a large-scale apparatus. The issue is to provide.

  As a result of intensive studies to solve the above problems, the present inventor has found that the following inventions meet the above object, and have reached the present invention.

That is, the present invention relates to the following inventions.
<1> A powdery microbial preparation in which sulfur bacteria are supported on a carrier containing 70% by volume or more of neutral porous particles having a particle size of 50 μm or less.
<2> The powdery microbial preparation according to the above <1>, further mixed with aerobic bacteria and / or facultative anaerobic bacteria.
<3> The powdery microorganism preparation according to <1> or <2>, wherein the porous particles are at least one selected from the group consisting of montmorillonite, zeolite, and kaolin <4> The above <1> A bag-like microbial preparation obtained by mixing silica sand and white sand with the powdered microbial preparation according to any one of <3> and enclosing it in a water-permeable bag.
<5> The bag-like microorganism preparation according to <4>, wherein the bag used for encapsulation is made of a biodegradable nonwoven fabric.
<6> Water purification, sludge decomposition, soil improvement, deodorization, and plankton generation suppression using the powdery microorganism preparation and / or the bag-like microorganism preparation according to any one of <1> to <5> One or more environmental purification methods selected from.

  The microbial preparation of the present invention carries sulfur bacteria, has excellent dispersibility, can be used easily and quickly, and exhibits a purification ability with stable sulfur bacteria. This microbial preparation is effective in, for example, purification of water, decomposition of sludge, soil improvement, deodorization, and suppression of plankton generation.

  DESCRIPTION OF EMBODIMENTS Embodiments of the present invention will be described in detail below. However, the description of the constituent elements described below is an example (representative example) of an embodiment of the present invention. It is not limited to the contents.

  The present invention relates to a powdery microbial preparation in which sulfur bacteria are supported on a carrier containing neutral porous particles having a particle size of 50 μm or less in an amount of 70% by volume or more. This microbial preparation is excellent in dispersibility, etc., and is a mode suitable for efficiently imparting sulfur bacteria to contaminated environments, etc., and by appropriately producing a synergistic effect with bacteria present in various environments. It is effective for water purification, sludge decomposition, soil improvement, deodorization, and plankton generation suppression.

  The microorganism preparation of the present invention uses a carrier containing 70% by volume or more of neutral porous particles having a particle size of 50 μm or less. The microbial preparation is a general term for substances that exhibit various functions using microorganisms, and more specifically, refers to those that are used by supporting microorganisms on a carrier.

  In the microorganism preparation of the present invention, a carrier mainly composed of porous particles is used. The porous particle is a particle having many pores in the particle. For example, mineral resources such as silicate minerals can be used as the porous particles. Moreover, examples of suitable porous particles include montmorillonite, mineral resources such as zeolite and kaolin, and it is preferable to use those containing at least one of these. Furthermore, the microorganism preparation of the present invention is characterized by carrying at least sulfur bacteria. Since this sulfur bacterium has a relatively small cell size as will be described later, this sulfur bacterium is also excellent in this configuration in that it is suitably and selectively supported on such porous particles having a relatively small particle size. ing.

  The porous particles of the present invention are neutral. Here, the neutral porous particles are those in which the pH is in a neutral range when the pH when the porous particles are mixed with water is measured. In confirming that the porous particles are neutral, the pH after stirring and mixing 10 g of the porous particles with 100 g of water may be obtained. The pH at this time is preferably 5.5 to 8.5, and more preferably 6 to 8. By using neutral porous particles, the fixability of sulfur bacteria supported on a carrier using the porous particles is improved. In addition, when the microbial preparation using the neutral porous particles is dispersed in the use environment, the possibility of changing the pH of the environment is reduced, so that a microbial preparation that can be used in a wide range can be obtained.

  As the porous particles of the present invention, those having a particle size of 50 μm or less are mainly used. This particle size is determined from the size passing through a sieve having the openings. For example, the maximum particle size of the porous particles passing through a 270 mesh sieve having an opening of 53 μm is 53 μm, and the size of the porous particles sieved using the 270 mesh sieve having an opening of 53 μm is 53 μm. It is as follows. As the porous particles of the present invention, it is more preferable to use mainly porous particles of 45 μm or less that can be sieved with a 325 mesh having an opening of 45 μm. By using porous particles having such a particle size as a main carrier, the dispersibility of the resulting microbial preparation is excellent. Water-based places such as ponds and seas are suitable for the use of the microorganism preparation of the present invention. Even in such a water-based place, the powdery microbial preparation of the present invention is simply sprayed, and even if there is only a small water flow, it can be sufficiently dispersed. In addition, since the porous particles having such a particle size have a low sedimentation rate, they are gradually dispersed in the depth direction in water.

  As described above, the porous particles of the present invention are mainly particles having a relatively small size. The amount of the porous particles in the carrier is 70% by volume or more, more preferably 80% by weight or more, and particularly preferably 90% by weight or more. Even if the porous particles used as the carrier partially include those having a large particle size, the dispersibility and the like are sufficiently exhibited if the above-described requirements are satisfied.

  The powdery microbial preparation of the present invention carries sulfur bacteria. Here, the sulfur bacterium is a chemically synthesized autotrophic bacterium that obtains energy by oxidizing or reducing sulfur and a sulfur compound. It is a general term for a group of bacteria that can mainly oxidize hydrogen sulfide to sulfur and further oxidize to sulfuric acid. Examples of such sulfur bacteria are also referred to as sulfur-oxidizing bacteria, and include bacterial groups roughly classified into colorless sulfur bacteria and colored sulfur bacteria depending on the presence or absence of pigments. Colorless sulfur bacteria include aerobic and filamentous forms such as Beggiatoa, Thiothrix, and Thioploca. Thybacillus and achromati A genus such as Achromatium and Acidthiothiobacillus is known. Colored sulfur bacteria include anaerobic and red-colored canine chromates (Chromatium), thiocapsa, green and cannabis (Chlorobium). The colored sulfur bacterium contains a photosynthetic pigment (bacteriochlorophyll) and performs photosynthesis, so it is also called a photosynthetic bacterium. In the present invention, any of these sulfur bacteria may be used, and at least one sulfur bacterium selected from the group of sulfur bacteria described above is preferably used.

  In the present invention, as described above, since mainly the porous particles having a small particle size are used, the pores of the porous particles are inevitably small. There are many filamentous fungi having a size of about 0.5 to 10 μm in width, and the like, which are selectively carried on the porous particles used in the present invention and are easy to grow. This combination is also excellent in that it is unlikely to cause substitution with other bacteria or loss of sulfur bacteria.

  Aerobic bacteria and / or facultative anaerobic bacteria can be further mixed in the microorganism preparation of the present invention. Aerobic bacteria are bacteria that have an oxygen-based metabolic mechanism and require oxygen for growth, and facultative anaerobic bacteria are bacteria that grow with or without oxygen. Contributes to the purification of organic matter. In the present invention, it is preferable to mix fungi such as fungi, acetic acid bacteria, lactic acid bacteria, and yeasts as these bacteria in a supported manner. Moreover, you may mix the dry powder of various microbes, without making it carry | support to the porous particle which is a support | carrier directly.

  The microorganism preparation of the present invention may be used by being enclosed in a bag. Especially in places with a large water flow, the powdered microbial preparation may be excessively dispersed and the effect may be reduced after a certain period of time. it can. Furthermore, when encapsulated in a bag and used in an aqueous system, the porous particles of the present invention solidify like a viscosity and become agglomerated in the bag, and further, sulfur bacteria are dissipated from the agglomerated material, so that it is washed away. There is a long-term stable effect.

  When encapsulating in a bag, it is preferable to mix and encapsulate white sand and quartz sand in addition to the powdery microorganism preparation of the present invention. From the standpoint of sedimentation, it is preferable that a photosynthetic bacterium is contained as a supported sulfur bacterium, and is mixed from the viewpoint of facilitating the photosynthesis. By mixing white sand or silica sand with a certain light transmittance and dispersibility, light easily reaches the inside of the bag-shaped microbial preparation, so it is easy to perform the purification function of the bag-shaped microbial preparation as a whole. Become.

  When a bag-like microbial preparation is used, it is preferable to use a biodegradable nonwoven fabric such as polylactic acid using a plant-derived resin. By using a biodegradable non-woven fabric as the bag, there is no risk of environmental pollution due to the bag itself, and this bag-shaped microbial preparation can be easily used. Such a biodegradable non-woven bag is particularly suitable for use in an environment that is wide and difficult to recover, such as the sea. On the other hand, non-biodegradable woven fabric (for example, a woven fabric made of a chemical resin such as polyester) or a bag made of non-woven fabric can be used. It is suitable for use in locations where it is easy to identify and retrieve the location and reuse it.

  When the bag-shaped microbial preparation is used, the mixing ratio of the powdered microbial preparation and the white sand and quartz sand can be appropriately set according to the use environment of the bag-shaped microbial preparation. For example, the mixing ratio can be 5 to 30 parts by weight of white sand and 5 to 20 parts by weight of silica sand with respect to 100 parts by weight of the porous particles.

  The powdery microorganism preparation and the bag-like microorganism preparation of the present invention can be used in at least one environmental purification method of water purification, sludge decomposition, soil improvement, deodorization, and plankton generation suppression. That is, since it can be used for water purification, sludge decomposition, soil improvement, deodorization, and plankton generation suppression, it can be achieved as a method used for each purpose. More specifically, when used in a water purification method, examples of water to be purified include septic tanks, seas, ponds, swamps, streams, farms, and aquariums. These can be purified by a method such as leaving the microbial preparation of the present invention stationary or simply spraying it on the water surface. For example, when the bag-shaped microbial preparation of the present invention is placed in a water tank, the water in the water tank is hardly contaminated, and water quality management with high transparency can be performed.

  Moreover, it can also be achieved as a method for decomposing sludge using the microorganism preparation of the present invention. Sludge is an anaerobic state in which organic matter is excessively biodegraded in sediment containing a large amount of organic matter, and sulfides such as hydrogen sulfide are generated, resulting in aerobic bacteria and facultative anaerobic bacteria. Is difficult to live. In particular, sludge in which the generation of hydrogen sulfide is remarkably confirmed may be referred to as hydrogen sulfide sludge. Such sludge is difficult to decompose organic matter by protozoa and difficult to purify, but by mixing and spraying the powdered microbial preparation of the present invention, the bag-shaped preparation can be left in the vicinity. These sludge can be decomposed and returned to the original sediment.

  It can also be achieved as a soil improvement method using the microorganism preparation of the present invention. In order to improve the soil, it is possible to normalize the electrical conductivity of the soil and improve the soil by mixing and spraying the microbial preparation of the present invention. This improved soil makes it easy for various plants to grow. Specifically, it can be used for vegetables, flowers, lawn, planting trees, trees, fruit trees and the like.

  It can also be achieved as a deodorizing method using the microorganism preparation of the present invention. In this case as well, the deodorizing effect can be achieved by spraying it on objects such as garbage, drains, and flush toilets.

  It can also be achieved as a plankton generation suppression method using the microorganism preparation of the present invention. In other words, water areas such as seas, lakes, and rivers can be used to suppress the occurrence of abnormalities such as plankton accompanying eutrophication from oligotrophic conditions, thereby improving and preventing red tides and sea cucumbers.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to a following example, unless the summary is changed.

"Preparation of microbial preparations"
"Carrier"
The soil of the weathered product layer rich in montmorillonite, which is neutral porous particles, was sieved with a 325 mesh (mesh opening: 45 μm) wire mesh sieve to obtain particles having a particle size of 45 μm or less. These particles were used as a carrier for the microorganism preparation of the present invention.
"Microorganisms"
(Culture solution a. Culture solution of sulfur bacteria)
As a microorganism to be supported on the microorganism preparation of the present invention, a culture solution a of sulfur bacteria was prepared by culturing using a known culture solution in which Acidthiobacillus genus, a sulfur-oxidizing genus, is preferentially cultured.
(Culture solution b. Culture solution of facultative anaerobic bacteria)
A culture solution b of facultative anaerobic bacteria was prepared using a known culture solution in which lactic acid bacteria and yeast are preferentially cultured as a group of microorganisms to be carried on the microorganism preparation of the present invention.
"Supporting method"
A culture solution dilution was prepared by mixing 5 parts by weight of the culture solution of the culture solution a, 5 parts by weight of the culture solution of the culture solution b, and 90 parts by weight of water. 100 parts by weight of the culture broth diluted solution was sprayed on 2000 parts by weight of the above-mentioned carrier and naturally dried at room temperature to obtain a powdery microbial preparation (B) in which the carrier was loaded with microorganisms.

"Pack (bag-like microorganism preparation)"
In order to obtain a bag-like microorganism preparation (pack preparation), a polylactic acid non-woven bag having a basis weight of 70 g / m ² was used. In this bag, 1 kg of a mixture of 15 parts by weight of a mixture of silica sand and white sand (silica sand: white sand = 1: 1 (weight ratio)) to 85 parts by weight of the powdered fine tax preparation (B) is sealed. A bag-like microorganism preparation (A) was obtained. In the following test examples, the bag-shaped microbial preparation (A) was mainly used, but the powdered microbial preparation (B) as the contents was also used as appropriate.

"Measuring method"
[Sulphides]: Bottom sediment investigation method (annular water tube No. 127 dated September 8, 1988) II. Measured according to 17.
[COD]: Measured according to JIS K0102 (2008) 17.
[Total nitrogen (TN)] Measurement method (N1): Bottom sediment investigation method (annual water tube No. 127 dated September 8, 1988) II. Measured according to 18.
[Total nitrogen (TN)] Measurement method (N2): Measured according to JIS K0102 (2008) 45.4.
[Total phosphorus (TP)] Measurement method (P1): Bottom sediment investigation method (annular water tube No. 127 dated September 8, 1988) II. Measured according to 19.
[Total phosphorus (TP)] Measurement method (P2): Measured according to JIS K0102 (2008) 46.1.1.
[Loss on ignition]: Bottom sediment investigation method (annular water tube No. 127 dated September 8, 1988) II. Measured according to 4.
[Transparency]: Measured according to JIS K0102 (2008) 9.
[Odor]: The sigma value of odor was measured using “Calmore Sigma SK-210” manufactured by Calmore.
[EC]: The EC value of the soil was measured using a “waterproof conductivity meter PCD-431” manufactured by Satotech.

[Test Example 1: Water purification test]
[Test environment]
Location: Reservoir in Fukuoka Prefecture (Water volume: about 120,000 tons)
Around July before the start of the test, water reservoirs were generated in this reservoir, resulting in problems of deterioration of transparency, generation of bad odor, and blockage of existing sand filtration devices.

[Test method]
Formulations and amounts used: 50 bag sachets (A) (50 kg), 30 kg powder microbials (B)
Application method: The bag-shaped microbial preparation (A) was evenly arranged in the pond (one bag at about 400 m ² ). Further, 30 kg of the powdered microbial preparation (B) was diffused throughout the pond using a water flow generated by a boat screw that sailed near the center of the pond. The pH of this pond at the start of the test was 8.79.
The analysis results of Test Example 1 are shown in Table 1.

  It was confirmed that the sulfide concentration and COD were reduced by spraying the microorganism preparation of the present invention to purify the water quality. In addition, the water in the pond was suppressed, the transparency increased, and the odor improved. The load on the filtration device attached to this pond was also reduced.

[Test Example 2: Degradation test of sludge]
[Test environment]
Location: Ariake Sea clam fishing ground (sand beach, river mouth), Shimabara City, Nagasaki Prefecture
Before the start of the test, a large amount of sea bream was launched at this fishing ground, which decayed and became muddy and had a bad odor, and the clams could not be harvested due to the occurrence of sulfides.

[contents of the test]
(Sand beach): In the section of the sandy shoreline of the clam fishing ground about 500m, piles are piled every 20m and a bag-like microbial preparation (A) is put into a net bag (1kg content), and a total of 25 bags (25kg) are installed. did. Moreover, after installation, four powdery microbial preparations (B) (4 kg) were sprayed on the sandy beach.
The analysis results of the sandy beach of Test Example 2 are shown in Table 2.
(Kawaguchi): Four bags (4 kg) of the bag-like microbial preparation (A) were installed upstream of the river flowing into the clam fishing ground, and 1 kg of the powder microbial preparation (B) was sprayed.
Table 3 shows the analysis results of the processing of Test Example 2.

  Progress: The smell of rotting disappeared, and the sandy beach that had been buried in sludge became clearly visible and returned to the original sandy beach. In addition, it recovered to the point where the clams were released.

[Test Example 3: Bottom sediment improvement]
[contents of the test]
Location: Approximately 80,000m ²
The inflow water from the racetrack on the racetrack contained fertilizers and pesticides in the paddy fields upstream of it, and the amount of nitrogen was very high, and the occurrence of blue sea bream was terrible. Moreover, rust preventives have been sprayed for many years in order to temporarily suppress the sea cucumber, and the bottom quality has been greatly deteriorated.
Application amount: 16 bags of microbial preparation (A) (16 kg), 16 kg of powdered microbial preparation (B)
The bag-like microbial preparation (A) was evenly arranged in the competitive pool. Moreover, the powdery microbial preparation (B) was sprayed on the whole.
Test start time: April Table 4 shows the analysis results of Test Example 3.

Background: Nitrogen and phosphorus in the bottom sediments, which are the nutrients for the sea cucumber, were reliably reduced, and a certain level of sea cucumber improvement was observed.

[Test Example 4: Improvement of water and bottom quality]
[contents of the test]
Location: Castle castle in Fukuoka Prefecture 1500m ²
Spray formulation and amount used: bag-shaped microbial preparation (A) 3 bags (3 kg), powdered microbial preparation (B) 3 kg
The bag-like microbial preparation (A) was evenly arranged on the basket. Moreover, the powdery microbial preparation (B) was sprayed on the whole.
Test start time: December Table 5 shows the analysis results of Test Example 4.

Progress: As shown in Table 5, the measurement items changed. In addition, the improvement of transparency and bottom sediment (decomposition of sulfide) and the regeneration of lotus were confirmed.

[Test Example 5: Improvement of odor]
[contents of the test]
Location: Ariake Nori Drying Plant in Saga Prefecture
Formulation and amount used: 1 kg powdered microbial formulation (B)
Spraying method: sprayed in the drainage tank (about 400 t) of factory wastewater and upstream of the water channel between the factory and the drainage tank.
Test start time: December Test content: The purpose of improving the waste water that is accumulated in the drainage tank and has a bad odor, and finally the water turns pink due to the pigment of the paste when it drains into the river. . Nothing was sprayed on the drainage tank (A) of the fishery drying factory, and the microbial preparation was sprayed on the drainage tank (B) of the fishery drying factory as described above.
The analysis results of Test Example 5 are shown in Table 6.

Progress: The odor of the drainage tank was suppressed by spraying the microorganism preparation of the present invention. In addition, the pink color of the drainage was improved. The higher the odor sigma value, the higher the odor, and this sigma value is confirmed as a relative value. At the time of the test, the outside air is in a state showing 333 to 340, and the water tank (A) which is the control tank rose to 1079 because the microbial preparation was not sprayed, but the water tank (B) which was sprayed with the microbial preparation was It rose only to 630.

[Test Example 6: Improvement of soil]
Place: Soil of crop house (Agricultural area: 8m x 50m)
Use formulation and use amount: The powdery microorganism preparation (B) was sprayed so that the spray amount was 5 g / m ² .

  The value of the fertilizer EC before spraying the powdered microorganism preparation of the present invention was 1800 μS / cm, which was a high value unsuitable for cropping, but decreased to 700 μS / cm after spraying.

  The microorganism preparation of the present invention can be used for purification of water, decomposition of sludge, soil improvement, deodorization, suppression of plankton generation, and the like, and is industrially applicable.

That is, the present invention relates to the following inventions.
<1> As a neutral porous particle having a particle size of 50 μm or less, a sulfur bacterium is superior to a carrier containing 70% by volume or more of at least one kind of porous particle selected from the group consisting of montmorillonite, zeolite, and kaolin. A powdery microbial preparation that preferentially supports sulfur bacteria by contacting and drying a precultured culture .
<2> The powdery microbial preparation according to the above <1>, further mixed with aerobic bacteria and / or facultative anaerobic bacteria.
< 3 > A bag-like microbial preparation in which silica powder and white sand are mixed with the powdered microbial preparation according to <1> or <2> and enclosed in a bag having water permeability.
< 4 > The bag-like microorganism preparation according to < 3 >, wherein the bag used for encapsulation is made of a biodegradable nonwoven fabric.
< 5 > Water purification, sludge decomposition, soil improvement, deodorization, and plankton generation suppression using the powdery microorganism preparation and / or bag-like microorganism preparation according to any one of <1> to < 4 > One or more environmental purification methods selected from.

That is, the present invention relates to the following inventions.
<1> As a neutral porous particle having a particle size of 50 μm or less, a sulfur bacterium is superior to a carrier containing 70% by volume or more of at least one kind of porous particle selected from the group consisting of montmorillonite, zeolite, and kaolin. To the powdery microbial preparation that preferentially carries sulfur bacteria by contacting and drying the culture solution that has been preferentially cultured ,
A bag-like microbial preparation in which silica sand and white sand are mixed and sealed in a bag having water permeability,
In the bag-like microbial preparation, the bag-like microbial preparation is encapsulated by mixing 5 to 20 parts by weight of the silica sand and 5 to 30 parts by weight of the white sand with respect to 100 parts by weight of the powdered microbial preparation. Microbial preparation.
<2> The bag-like microorganism preparation according to <2>, further mixed with aerobic bacteria and / or facultative anaerobic bacteria.
<3> The bag-like microorganism preparation according to <1> or <2>, wherein the bag used for encapsulation is a biodegradable nonwoven fabric bag.
<4> At least one or more selected from purification of water, decomposition of sludge, soil improvement, deodorization, and suppression of plankton generation using the bag- like microorganism preparation according to any one of <1> to <3> Environmental purification method.

Claims (6)

  A powdery microbial preparation in which sulfur bacteria are supported on a carrier containing 70% by volume or more of neutral porous particles having a particle size of 50 μm or less.   The powdery microbial preparation according to claim 1, further comprising aerobic bacteria and / or facultative anaerobic bacteria.   The powdery microorganism preparation according to claim 1 or 2, wherein the porous particles are at least one selected from the group consisting of montmorillonite, zeolite, and kaolin.   A bag-like microbial preparation obtained by mixing silica sand and white sand with the powdered microbial preparation according to any one of claims 1 to 3 and enclosing the mixture in a water-permeable bag.   The bag-like microorganism preparation according to claim 4, wherein the bag used for encapsulation is made of a biodegradable nonwoven fabric.   6. At least one selected from water purification, sludge decomposition, soil improvement, deodorization, and plankton generation suppression using the powdery microorganism preparation and / or the bag-like microorganism preparation according to any one of claims 1 to 5. The above environmental purification method.