JPH0644861B2 - High temperature and wet fermentation method of medium - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for fermenting a medium, in which an organic substance such as food waste or livestock excrement is used as a medium, and the complete fermentation is time-consuming. It is carried out without causing foul odor pollution.

[Conventional technology]

Food waste, kitchen waste, livestock excrement, various sludges, feed crops,
When fermenting an organic substance similar to these as a medium, when the microorganism grows using the organic substance in the medium as a nutrient source, when air is supplied and fermented, the air is unsaturated, so the interface of the medium Moisture shifts to the saturation of the supply air, and the latent heat of vaporization at that time lowers the product temperature of the medium and significantly reduces the growth of microorganisms, leading to interfacial drying of the medium, which slows down and stops fermentation. .

On the other hand, it is well known that sending high temperature / humid air to promote fermentation greatly accelerates fermentation. A super-moisture state occurs in the portion that comes into contact with the tank wall surface, which causes uneven fermentation of the medium.

In order to solve this, (a) stir and mix the medium by cutting the medium with a shovel, (b) moving and stir mixing of the medium with a stirring and mixing device, (c) moving and stir mixing of the medium with a rotating cylinder, (d) medium The moving stir mixing is performed by the inclined plate.

However, the above-mentioned stirring and mixing causes a drawback that the activity of microorganisms is lowered and a drawback that a bad smell is generated and secondary pollution due to heat radiation is caused.

[Problems to be Solved by the Invention]

The present inventor has completed the present invention through various studies, with the technical problem of performing complete fermentation of the medium without causing trouble and without causing foul odor pollution.

[Means for Solving the Problems]

That is, the present invention uses an organic substance selected from food waste, kitchen waste, livestock excrement, various sludges and feed crops as a medium, and an open type fermentation container (hereinafter simply referred to as “fermentation container”) containing the medium 1.
2) is housed in a container storage chamber 4 that shields the outside air by forming a space 3 around the container 2, and the medium 1 is fermented under high temperature and humidity. It is a high temperature and wet fermentation method.

The details of the present invention will be described below.

The fermentation medium 1 is the same as the conventional medium,
An organic substance selected from food waste, kitchen waste, livestock excrement, various sludges and feed crops, the water content of which is 35 to 6
It is mainly composed of a fermentable organic substance having 0% and pH adjusted to 6 to 12.

The fermentation container 2 may be made of a porous material or a plate having no holes. In the latter case, the upper opening type without a lid is used. A porous fermentation container is suitable as a fermentation container because it has good air permeability. Since this porous fermentation container can be accommodated in the container storage chamber 4 in the front-rear, left-right, and up-down directions, there is an advantage that one fermentation container can be made compact and easy to handle. Proper ventilation is beneficial even in the case of plates without holes. Of course, even if there is no ventilation hole, it is an open type without a lid, so fermentation can be completed normally by extending the fermentation time.

When the fermentation container 2 is housed by one, the container storage chamber 4 that shuts out the outside air is designed to be one size larger than that.
When a plurality of fermentation vessels 2 are to be stored, the volume is designed to be one size larger than the previous volume, and the container storage chamber 4 and the fermentation vessels 2 are stored.
It is designed so that there is a space 3 between it and the entire outer circumference. Speaking of the fermentation container 2, a space 3 is provided between the fermentation container 2 and the container storage chamber 4.
It means that they should be housed so that they can do it.

The container storage chamber 4 is provided with a door serving as an inlet / outlet of the fermentation container 2 in a sealable manner, but the container storage chamber 4 is provided in a horizontally long shape, and doors are provided at both ends thereof, one of which serves as an inlet of the fermentation container 2 and the other of which A plurality of fermentation vessels 2 can be operated by sequentially moving the fermentation vessels 2 from the input side to the outlet side as an outlet.

Thus, abandoned tunnels can be used in the practice of the invention. Further, various designs are possible, such as widening the lateral width of the container storage chamber 4 so that the inlet and outlet of the fermentation container 2 are provided adjacent to each other, and the fermentation container 2 has a U-turn.

In addition, the gas in the container storage chamber 4 may be circulated while the container storage chamber 4 is kept in a sealed state that shuts off outside air.
As shown in FIG. 2, the ceiling of the container storage chamber 4 and the lower part of the side wall are connected by a pipe 5, and a blower 6 is provided in the middle of the pipe 5.
To provide.

Furthermore, in the present invention, since the medium 1 is fermented under humid condition, it is not necessary to dehumidify, but when it is difficult to prevent water from accumulating at the bottom of the container storage chamber 4, an appropriate dehumidifying process can be performed within a range capable of maintaining a wet condition. do it.

In addition, it is preferable to use a heat insulating material in the container storage chamber 4 in order to improve the heat retaining effect.

[Action]

The fermentation container 2 containing the medium 1 is placed in a container storage chamber 4 that shields the outside air by forming a space 3 around the fermentation container 2 and left to stand. The medium 1 starts aerobic fermentation by seeding of natural microorganisms or inoculum, and the inside of the container storage chamber 4 is in a high temperature / wet state due to the heat of fermentation of the medium 1 and evaporation of water from the medium 1.

Therefore, the fermentation of the medium 1 progresses under the condition of being covered with high temperature and humid gas, and not only the medium does not become a superfluid state as in the conventional case, but also stirring and mixing are not performed during the fermentation period, so that heat loss is not caused. However, the fermentation proceeds rapidly, harmful microorganisms are killed, useful microorganisms grow, and a good fermented product is obtained.

〔Example〕

 Examples of the present invention will be described below.

Example 1. Okara 600 prepared by heating raw okara with a water content of 80% and dried okara with a water content of 14% to adjust the water content to 48% was inoculated with dry yeast (aerobic bacterium: marshkobacco) as a medium and used as a medium. As shown in, put it in the fermentation container 2 (vertical 100 cm, width 60 cm, height 100 cm) opened above. A space 3 is formed around the fermentation container 2 by opening the door of the container storage chamber 4 (vertical 120 cm, width 80 cm, height 120 cm) and inserting the fermentation container 2 inside.

When the door of the container storage chamber 4 is closed and left to stand, the medium 1 starts aerobic fermentation, and as the temperature rises, the container storage chamber 4
The space 3 is covered with high temperature and humid gas. The temperature reaches 60 ° C. in 15 hours. The fermentation vessel 2 is taken out after 48 hours.

The fermented medium 1, that is, the fermented okara became a uniform fermenting organism having an odor and a water content of 35%. To prepare this for storage, it was dried to a water content of 16% or less.
The protein content of this fermented okara is about 3 per dry okara.
0% increased to 44%, which is most suitable for livestock feed and aquatic feed.

Example 2. Porcine feces 600 prepared by mixing swine feces with a water content of 78% and swine feces fermentation products with a water content of 38 to adjust the water content to 58% were used as a medium, and as shown in FIG. Put in Fermentation Container 2 (100 cm vertical, 60 cm horizontal, 25 cm high). When the fermentation container 2 is opened by opening the door of the container storage chamber 4 (vertical 120 cm, width 80 cm, height 120 cm) and stacked inside, a space 3 is formed around the fermentation container 2.

When the container storage chamber 4 is left closed with the door closed, the medium 1 starts aerobic fermentation due to useful microorganisms contained therein, and the temperature of the space 3 in the container storage chamber 4 rises as the temperature rises.
Covered with moist gas. The temperature reaches 70 ° C. in about 20 hours.

Here, a blower 6 is provided for homogenizing the fermentation gas in the container storage chamber 4.
(See FIG. 2) is operated and the fermentation gas is circulated. The temperature in the container storage chamber 4 continues to be 65 ° C for 48 hours or more,
After that, the temperature gradually drops to 30 to 45 ° C. Fermentation days 10
The fermentation container 2 is taken out in a day and the fermentation is completed.

The fermented product has a water content of 48%, no bad odor, fermentation is homogenized, changes into a substance that is easy to handle, its appearance is brownish brown, and the soil useful bacteria (actinomycetes 10 ⁷
/ G dry soil) was obtained. This fermentation product can be used as a soil conditioner.

〔The invention's effect〕

The present invention has the configuration as described above, and since the medium is fermented in the container storage chamber 4 that shuts off the outside air, that is, in the container storage chamber 4 in a sealed state, a foul odor does not always dissipate from the container storage chamber 4. , No foul odor pollution or heat radiation pollution will occur. Further, since the fermentation is carried out in a favorable environment of high temperature and humidity and with the space 3 around the fermentation vessel 2, the medium 1 does not have a super-moisture state and there is no uneven fermentation of the medium. . Further, the medium 1 does not have to be mixed by stirring, the facility is simple, the cost is low, and the economy is excellent.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view for explaining an embodiment of the present invention,
FIG. 2 is also a vertical sectional view for explaining another embodiment of the present invention. In the figure, 1 is a culture medium, 2 is an open type fermentation container, 3 is a space, 4 is a container storage chamber, 5 is a pipe, and 6 is a blower.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical display location C05F 3/00 7188-4H 7/00 7188-4H 9/00 7188-4H C09K 17/00 E C12M 1/16 (C12N 1/00 C12R 1: 645) (72) Inventor Isamu Ikemoto 1145 Nagasakashinmachi, Kurayoshi-shi, Tottori Prefecture (72) Inventor Keiji Kameda 1540-7 Koshiden-cho, Kurayoshi-shi, Tottori Inventor Toshimitsu Ishida 2736 Sezaki-cho, Kurayoshi-shi, Tottori (56) References Shiro Teramoto, “Brewish Engineering,” Korin Shoin, Sho 44-6-5. 411-412

Claims (1)

[Claims] 1. An open-type fermentation container 2 containing the medium 1, which is an organic substance selected from food waste, kitchen waste, livestock excrement, various sludges and feed crops, and a space 3 around the container 2. A high temperature / wet fermentation method for a culture medium, which is characterized in that the culture medium 1 is stored in a container storage chamber 4 that shuts off the outside air, and the culture medium 1 is fermented under high temperature / wet conditions.