JPH08103755A - Fungus carrier for decomposing food waste - Google Patents

Abstract

(57) [Summary] [Object] To provide a bacterium carrier for decomposing raw garbage using a carrier having appropriate breathability and water retention, and having an excellent microbial carrying function and durability. [Structure] Dehydrated and dried product of activated sludge 40 to 70% by weight, and chaff and / or chaff smoked substance 20 to 60
A microorganism carrier for decomposing organic waste, which comprises mixing 5% by weight, a thermosetting resin of 5 to 10% by weight, and a water-soluble nutrient source of 4 to 20% by weight, granulating and drying and solidifying. [Effect] The dehydrated and dried product of activated sludge functions as a source of microorganisms, has good compatibility with microorganisms, and is excellent in water retention, and thus functions as a good carrier. The huddles and / or husks serve as a durable and breathable carrier. The thermosetting resin functions as a highly durable water-insoluble binder that keeps the bacterium-supporting body in a bulky state. The water-soluble nutrient source functions as a nutrient source for growing microorganisms.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fungus carrier for decomposing food waste, and in particular, having appropriate air permeability and water retention,
The present invention relates to a bacterium-carrying body obtained by supporting a microorganism for decomposing food waste on a carrier having excellent durability for supporting microorganisms and having excellent durability.

[0002]

2. Description of the Related Art In recent years, it has become important to reduce the volume of waste and to effectively reuse it as the amount of waste is increased. Raw garbage is decomposed and reused effectively as fertilizer. A technology has been proposed and has already been put to practical use in various places.

[0003] Conventionally, as an auxiliary agent for decomposing food waste, there has been known a material utilizing the effect of decomposing food waste by microorganisms. The microorganism for decomposing food waste is provided by being carried on a carrier, and is mixed with food waste for use in a food waste decomposing processor or composting treatment.

[0004] Conventionally, sawdust has been used as a carrier for the microorganisms for decomposing food waste since it is excellent in air permeability, has water retention, is inexpensive, and has an excellent function of supporting microorganisms.

[0005]

The sawdust that has been conventionally used as a carrier for supporting microorganisms has the above-mentioned advantages, but on the other hand, it has poor durability and is deteriorated during the processing of decomposing garbage. Further, the coarse powder content is excellent in breathability but water retention is not sufficient, and conversely, the fine particle content is excellent in water retention but lacks in air permeability, such that the balance between air permeability and water retention varies depending on the particle size, There is also a drawback that it is difficult to secure desired air permeability and water retention.

The present invention solves the above-mentioned conventional drawbacks, has appropriate breathability and water retention, and is excellent in the function of supporting microorganisms and also has a durable carrier for decomposing food waste. It is intended to provide a bacterium carrier.

[0007]

The fungus carrier for decomposing food waste according to claim 1 is a dehydrated and dried product 40 to 7 of activated sludge.
0% by weight and fluffy and / or fluffy smoked bodies 20 to
It is characterized in that 60% by weight, 5 to 10% by weight of thermosetting resin and 4 to 20% by weight of a water-soluble nutrient source are mixed, granulated and dried and solidified.

The fungus carrier for decomposing food waste according to claim 2 is a dehydrated and dried product of activated sludge of 40 to 70% by weight, chaff and / or chaff, and 20 to 60% by weight, and thermosetting. Resin 5 to 10% by weight and water-soluble nutrient source 4 to 20% by weight are mixed, granulated, dried and solidified, and then treated with water to elute the water-soluble nutrient source and then dried. It is characterized by

The microorganism carrier for decomposing food waste according to claim 3 is 40 to 70% by weight of dehydrated and dried product of activated sludge, 20 to 60% by weight of chaff and / or scented chaff, and thermosetting. It is characterized in that 5 to 10% by weight of a resin and 4 to 20% by weight of a water-soluble nutrient source are mixed, granulated, dried and solidified, and then microorganisms are added and the mixture is cultured in water and then dried.

The present invention will be described in detail below.

The bacterium carrier for decomposing food waste according to claim 1 is obtained by mixing and granulating each raw material in the following mixing ratio and drying and solidifying.

Dehydrated and dried product of activated sludge: 40 to 7
0% by weight, preferably 40 to 50% by weight, chaff and / or scented husks: 20 to 60% by weight, preferably 40 to 55% by weight Thermosetting resin: 5 to 10% by weight, preferably 7 to 9% by weight % Water-soluble nutrient source: 4 to 20% by weight, preferably 5 to 8% by weight Here, the dehydrated and dried product of activated sludge means that after dehydrating the activated sludge collected in a usual sewage treatment plant, 40 ~
Those dried at 50 ° C. to a water content of 0.1 to 1.0% by weight are preferable. Such a product dried under relatively mild conditions retains the microorganism as it is without being killed, and functions as a source of the microorganism and also as a water retaining carrier for the microorganism.

Therefore, in the present invention, when the ratio of the dehydrated and dried product of the activated sludge is less than 40% by weight, the water retention as a carrier is insufficient, the amount of microorganisms is small, and the efficiency of decomposing food waste is poor. Becomes However, if it is blended in a large amount exceeding 70% by weight, the ratio of other components relatively decreases, and a sufficient function cannot be obtained.

[0014] The chaff and / or scented chaff is a non-water-holding porous body having air permeability and imparts stable water-holding property to the fungus carrier without deterioration during decomposition of garbage. . If the proportion of this husk and / or scented husk is less than 20% by weight, the water retention as a carrier is insufficient, and conversely, if it exceeds 60% by weight, the proportion of other components is relatively reduced and sufficient function is obtained. Can't get

The thermosetting resin functions as a water-insoluble and highly durable binder, and has the function of holding the fungus carrier of the present invention in a bulky form. If the proportion of the thermosetting resin is less than 5% by weight, the shape retaining function is insufficient, and 10% by weight
If it is blended over the range, the void portion will be reduced. As the thermosetting resin, polyester resin, acrylic resin,
A polyurethane resin or the like can be used.

The water-soluble nutrient source serves as a nutrient source for microorganisms, and powders of sucrose, glucose, ammonium chloride and the like can be used. When the proportion of this water-soluble nutrient source is less than 4% by weight, nutrition is insufficient, which is not preferable for the growth of microorganisms. On the contrary, when it exceeds 20% by weight, there is no great difference in the growth effect, and the proportion of other components is relatively large. Is reduced, and a sufficient function cannot be obtained.

In the bacterium carrier for decomposing food waste according to claim 1, the respective components are mixed in the above-mentioned predetermined ratios, granulated by a pan pelletizer, an oscillating granulator or the like, and dried and solidified at 40 to 50 ° C. It can be easily obtained.

In general, it is preferable that the bacteria carrier for decomposing raw garbage is a granulated product having a particle size of about 2 to 15 mm.

As described above, the fungus carrier for decomposing food waste according to claim 2 is prepared by drying the granulated product, treating the product with water to elute the water-soluble nutrient source, and thereafter at 40 to 50 ° C. It is obtained by drying with.

By thus treating with water to elute the water-soluble nutrient source, the pores of the traces of elution of the water-soluble nutrient source are formed, and a porous bacterial carrier is obtained.

The microorganism carrier for decomposing food waste according to claim 3 is obtained by drying the granulated product as described above, and a microorganism that decomposes the water-soluble nutrient contained therein and proliferates. Add
It was obtained by culturing in water at 30 to 35 ° C and then drying at 40 to 50 ° C.

By carrying out the culture treatment as described above, a microorganism carrier having a high concentration of microorganisms and a high efficiency of decomposing garbage is obtained.

As a microorganism that decomposes and decomposes water-soluble nutrients, Bacillus subtilis
Examples thereof include microorganisms belonging to the genus is) and the genus Rhizopus.

The bacterium-supporting material for decomposing food waste of the present invention thus obtained can be used, for example, as follows, and has good air permeability, water retention and microbial supportability and durability. Originally, raw garbage can be efficiently decomposed.

The bacterium carrier for decomposing raw garbage is mixed with a small amount of water together with the raw garbage, and the mixture is put into an ordinary garbage treating machine to decompose the garbage.

A bacterium carrier for decomposing raw garbage and raw garbage are mixed and buried in the soil.

[0027]

The dewatered and dried product of activated sludge functions as a source of microorganisms, has good compatibility with microorganisms, and is excellent in water retention, and thus functions as a good carrier.

The husk and / or scented husks function as a durable and breathable carrier.

The thermosetting resin functions as a highly durable non-water-soluble binder that keeps the bacterium support in a bulky state.

The water-soluble nutrient source functions as a nutrient source for growing microorganisms.

Therefore, according to the bacterium-carrying body of claim 1, which contains each of the above-mentioned components in a predetermined ratio, the bacterium-carrying body has appropriate air permeability and water retention property, good compatibility with microorganisms, and excellent durability The body is provided.

According to the second aspect of the present invention, there is provided a microorganism support which is porous and is more excellent in air permeability and water retention.

According to the bacterium carrier of claim 3, a bacterium carrier having a large amount of carried microorganisms and excellent in garbage decomposing efficiency is provided.

[0034]

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

Examples 1 to 4 The components were mixed in the formulations shown in Table 1 and granulated with a pan pelletizer to give granules having a particle size of 2 to 10 mm. This was dried and solidified at 50 ° C. to obtain a bacterium-supporting body.

10 kg of the thus obtained bacteria-supporting body was mixed with 2 kg of garbage together with a small amount of water, and the garbage was decomposed by an ordinary garbage processor, and in each case, it was completely decomposed in about 50 hours. We were able to. Further, since the bacterium-supporting body has excellent durability, it does not deteriorate during the decomposition of raw garbage, and after the decomposition treatment, when the same amount of raw garbage is mixed again and treated in the same manner, the same decomposition efficiency can be obtained. It could be used for a long time.

[0037]

[Table 1]

Example 5 The bacterial carrier obtained in each of Examples 1 to 4 was treated with water to elute the water-soluble nutrient source, and then dried at 50 ° C. to obtain the bacterial carrier having pores. Manufactured.

10 kg of the thus-obtained bacterial carrier was mixed with 2 kg of garbage together with a small amount of water, and the garbage was decomposed by an ordinary garbage processor, and in each case, it was completely decomposed in about 45 hours. We were able to. Further, since the bacterium-supporting body has excellent durability, it does not deteriorate during the decomposition of raw garbage, and after the decomposition treatment, when the same amount of raw garbage is mixed again and treated in the same manner, the same decomposition efficiency can be obtained. It could be used for a long time.

Example 6 2 g of Bacillus subtilis as a microorganism was added to 10 kg of the bacteria-supported bodies obtained in Examples 1 to 4, and the mixture was cultured in water at 30 ° C. for 20 hours. Then take out the bacterial carrier 5
It was dried at 0 ° C.

10 kg of the obtained bacteria-supporting body was mixed with 3 kg of garbage together with a small amount of water, and the garbage was decomposed by an ordinary garbage processor, and in any case, it was completely decomposed in about 26 hours. We were able to. Further, since the bacterium-supporting body has excellent durability, it does not deteriorate during the decomposition of raw garbage, and after the decomposition treatment, when the same amount of raw garbage is mixed again and treated in the same manner, the same decomposition efficiency can be obtained. It could be used for a long time.

[0042]

As described in detail above, according to the bacterium carrier for decomposing food waste of the present invention, it has appropriate breathability and water retention, good compatibility with microorganisms, and excellent durability. A bacterium carrier is provided.

According to the second aspect of the present invention, there is provided a bacterial cell support which is porous and is more excellent in air permeability and water retention.

According to the bacterium carrier of claim 3, a bacterium carrier having a large amount of microorganisms supported and excellent in garbage decomposing efficiency is provided.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location C12N 11/12

Claims (3)

[Claims] 1. A dehydrated and dried product 40 to 7 of activated sludge.
0% by weight and fluffy and / or fluffy smoked bodies 20 to
60% by weight, 5-10% by weight of thermosetting resin, and 4-20% by weight of water-soluble nutrient source are mixed, granulated, dried and solidified to support bacteria for decomposing raw garbage. body. 2. Activated sludge dewatering and drying treatment products 40 to 7
0% by weight and fluffy and / or fluffy smoked bodies 20 to
60% by weight, 5 to 10% by weight of thermosetting resin, and 4 to 20% by weight of water-soluble nutrient source are mixed, granulated, dried and solidified,
Next, a bacterium carrier for decomposing raw garbage, which is characterized by being treated with water to elute the water-soluble nutrient source and then dried. 3. A dehydrated and dried product 40 to 7 of activated sludge.
0% by weight and fluffy and / or fluffy smoked bodies 20 to
60% by weight, 5 to 10% by weight of thermosetting resin, and 4 to 20% by weight of water-soluble nutrient source are mixed, granulated, dried and solidified,
Next, a microorganism carrier for decomposing food waste, which is obtained by adding microorganisms, culturing in water, and then drying.