JPS6138697A - Treatment of waste materal having high water content by yeast cultivating fermetation - Google Patents

Abstract

PURPOSE:To enable efficient treatment of waste material having high water content such as domestic garbage with yeast by mixing yeast with the waste material. CONSTITUTION:Raw night soil is fed to a fermentation tank 11. The water content of the raw night soil is adjusted by mixing dry night soil, and first seed yeast consisting of brewing yeast is charged to the mixture and stirred. The temp. is elevated to at highest 65 deg.C when the height of the accumulated night soil is 15cm, and the temp. falls to 45 deg.C after 3-4 days. When it is <=45 deg.C, fermentation dying is continued while continuing stirring to finish the treatment. The product is finally discharged from the fermentation tank 11 and packed in bags.

Description

[Detailed Description of the Invention] [Field of Industrial Application] This invention relates to a method for treating high moisture content waste using a novel yeast culture type fermentation. High moisture content waste such as residue can be processed for a short period of time; in addition to efficiently fermenting and removing moisture, the fermented product after treatment can be reused as seed fungi, and can also be directly returned to farmland as fertilizer. The purpose of the present invention is to provide a method for treating high moisture content waste using yeast culture type fermentation.

[Conventional technology]

Conventionally, wastes containing high moisture content, such as human and livestock manure and household residue, have been reduced to the soil by burying or scattering them in fields, etc. as they are. However, in this case, growth problems often occur in agricultural crops, and many hygienic and environmental problems occur, resulting in social problems. For this reason, the moisture content is adjusted by drying in the sun or by adding wood flour such as sawdust, planar scum, chip dust, or rice hulls.
Therefore, it is widely practiced to compost it and return it to the soil as an organic fertilizer or soil conditioner.

Composting high moisture content waste such as human and animal manure and household residue is
In addition to adjusting the moisture content using the above-mentioned mixed materials, it is also possible to adjust the moisture content of high-moisture waste to 60% by sun drying or thermal power, and then turn it over once every three days to allow the heat buildup to occur. 60-70 by providing aerobic conditions
Fermentation is completed in about 2 to 3 weeks when the temperature is raised above ℃.

This is due to the proliferation of microorganisms and bacteria at the beginning of composting.
There is a first stage of organic matter decomposition that involves the production of organic acids and other substances and the active consumption of oxygen.
This is because the immaturity causes problems in the growth of crops, making it an inconvenient growing environment for plants. From this first stage, the ammonia nitrogen changes to the nitrite state through the nitrite state, which is the second stage, but this stage has an oxidative character and progresses slowly and over a long period of time. It took several months.

[Problem that the invention seeks to solve]

However, in order to achieve good composting at a temperature of 60 to 70°C or higher, the thickness of the deposited layer must be approximately 1 m and the length must be at least 2 m, and cutting back this deposited layer requires extensive work. This requires an expensive stirring device, or a long period of about 2 to 3 weeks of air blowing or turning.

[Means for solving problems]

In view of these circumstances, the method of treating high moisture content waste by yeast culture fermentation of the present invention solves the above-mentioned drawbacks of the conventional method by blending brewing yeast into high moisture content waste such as human and animal excrement and household residue. .

That is, high moisture content waste by yeast culture type fermentation, which is characterized in that high moisture content waste such as human and animal excrement and household residue is adjusted to a predetermined moisture content, and then brewing yeast is mixed and fermented. This is the processing method.

In this invention, yeast culture fermentation is a fermentation method using highly active yeast, and the following types have been clarified.

■ Extremely aerobic, with high oxygen demand and water content of 6
At around 0%, in the presence of decomposing carbohydrates, especially starch, a temperature of 65° C. was obtained under conditions of about 15 cm of floor deposition as shown in FIG. In the figure, // is a fermentation layer, /d is an unfermented layer, and /3 is a fermentation bed.

As shown in ■ and ■, it has extremely aerobic characteristics, so it hardly shows the anaerobic (cyclonetic) characteristics shown in conventional examples. In other words, the generation of substances that are the cause of odor pollution, such as organic acid odor and hydrogen sulfide odor, which are the sources of odor, is not observed.

■1 When the ratio of nitric life to carbon in high-moisture content waste such as human animal manure and household residue is small, the rate of heat generation due to fermentation is fast, and the decomposition of easily soluble carbohydrates is completed in an extremely short period of time, and the heat generation is rapid. descend to At this time, nitrogen is separated as ammonia gas and may be mixed into the exhaust gas.

I don't get the impression that it's particularly strong. The main component of the exhaust gas is carbon dioxide (CO2).

Even if high moisture content waste such as human and animal excrement and household residue gives off a bad odor when placed in an anaerobic condition, if it is processed using this yeast culture type fermentation, the odor will be completely deodorized in 2 to 3 days. be able to.

■Main fermentation works perfectly by supplying a sufficient amount of air, or oxygen. However, excessive oxygen supply becomes a negative factor. That is, a sudden temperature drop in the enzyme material, excessive temporary release of water, etc. may cause the fermentation to stop or the fermentation function to be significantly reduced.

Therefore, it can be said that the optimal air supply condition is an air flow of a slight breeze.

Examples of the brewing yeast used in the present invention include various brewing yeasts, sake lees, mirin brewing lees, and the like.

〔Example〕

An embodiment of the method for treating high water content waste by yeast culture fermentation according to the present invention will be described below with reference to the drawings.

First, explanation will be given based on the flow sheet shown in FIG.

In this invention, fermentation and stirring can be performed in a single fermentation tank. □ A. Transport the prepared raw feces method to the fermentation tank.

First, dry manure and urine are mixed with this enzyme material to adjust the moisture content, and a first seed bacterium consisting of brewing yeast is added and mixed with stirring.

When passing through the solid-liquid separator, brewer's yeast is added to the solid material obtained by separation, inoculated, and stirred.

The liquid is introduced into a storage tank and sprayed onto the surface using a pump depending on the fermentation situation and degree of dryness.

C. Fermentation begins within about 24 hours after inoculum, and the maximum temperature rises to 65°C with 15 cm of accumulation, and decreases to 45°C in 3 to 4 days. This is caused by a lack of moisture and a lack of foliage, so the temperature can be raised again by using the raw feces method or by spraying the above-mentioned liquid over the entire surface.

2. When the temperature drops below 45°C, continue fermentation and drying while stirring to finish. The period so far is lO ~ 15
Just look around the day.

2. After that, remove it from the fermenter, Pack 0 bags.

Since brewing yeast has already sufficiently propagated in the pre-drying stage, it can be used again as a starter.

FIG. 2 shows a drying apparatus in another embodiment of the method for treating high moisture content waste using yeast culture fermentation according to the present invention. In this example, stirring and blowing are hardly used, and the 40 cm
The fermentation is carried out in a three-dimensional fermenter, 2/, with a space ICl11 in between. In this case, the conditions for anaerobic fermentation are completely eliminated, so bad odors are less likely to occur. Furthermore, since the facility is a three-dimensional tank, a large area is not required. Also, stirring is no longer necessary.

No power is required for that purpose.

The drying device extracts the heat generated from the fermentation tank 2/ with a suction pipe 2tI, heats the floor surface 3, and dries it using the heat of the sun and the atmosphere. , 2.2 is an exhaust pipe.

[Effect]

The operation of the method for treating high water content waste by yeast culture fermentation according to the present invention will be explained.

(.

Since fermentation is carried out using brewer's yeast without passing through the conventional first stage, which has a cyclic nature, it is possible to rapidly raise the temperature to a high temperature of 60 to 70 degrees Celsius, which can produce weed seeds and various Bacteria, pests such as maggots and eggs are killed,
Extremely hygienic and safe processed materials can be obtained.

Furthermore, the processed product obtained by fermentation and drying becomes an organic fertilizer with uniform particle size and high fertilizing effect.

〔Effect of the invention〕

Since the method of treating high moisture content waste by yeast culture fermentation according to the present invention is configured as described above, the fermentation period can be shortened, and since there is no fermentation step of a cyclic nature, no foul odor or toxic gas is generated. do not have.

Furthermore, since it is easy to handle and does not require complicated facilities, it not only allows for extensive automation, but also enables extremely significant cost reductions in processing facilities.

[Brief explanation of the drawing]

FIG. 1 is a flow diagram showing an embodiment of the method for treating high moisture content waste by yeast culture fermentation according to the present invention, FIG. 2 is a perspective view of the fermentation apparatus used in the present invention, and FIG. FIG. 2 is a cross-sectional view showing the fermentation mechanism. l/...Fermented layer/, 2...Unfermented layer/3
...Fermentation bed=? /...Fermentation tank 2.2...Exhaust pipe, 23...Floor surface Figure 1 Figure 2 Figure J Figure 3 (, yen) November 12, 1980 Patent Application No. / IρF? ρθ No. 2 Name of the invention Method for treating high moisture content waste by yeast culture fermentation 3 Relationship with the case of the person making the amendment Patent applicant address (residence) Kamikyu, Nishiyatsushiro-gun, Yamanashi Prefecture - Iromura Fujike 4 Agent address 400 Showa year, month, day (shipment date) 6 Number of inventions increased by the amendment 8 Contents of the amendment 1) “Reductive "personality" is corrected to "reductive personality." 2) "Inoculation of seed culture J" on page 6, line 19 of the specification
I am corrected.

Claims (1)

[Claims] 1. High-moisture-containing waste by yeast culture fermentation, which is characterized by adjusting high-moisture-containing waste such as human and animal excrement and household residue to a predetermined moisture content, and then fermenting it by blending brewing yeast. processing method.