KR19990031159A - Food waste treatment method and apparatus using mesophilic microorganisms - Google Patents

Abstract

The present invention provides a method and apparatus for economically and effectively treating food waste by dissolving and extinguishing food waste using medium-temperature microorganisms and discharging it in a liquid state.

Due to the present invention, it is easy to systematically manage food wastes from problems such as transportation, storage and disposal problems due to odors and moisture generated during food waste treatment, and contamination of effluent water during reclamation. Efficient management becomes possible.

By providing temperature and humidity, which are the best conditions for mesophilic microorganisms to live through the device, the microorganisms completely decompose food waste, and the gas causing odors is dissolved in water and discharged so that no odors and residues remain in the device. .

Important terms include mesophilic microorganisms, spawning agents, titration temperature, hot water supply, amount of hot water, deodorization, decomposition, extinction, liquid phase, discharge, treatment device, pore size, etc.

Description

Food waste treatment method and device using medium temperature microorganism

1 is a perspective view of the device

2 is a side view of the device

3 is a front detail view of the device;

4 is an excerpt of the filtration device

* Explanation of symbols for main parts of the drawings

1: water supply device 2: water supply device

3: deceleration motor 4: agitator blade

5: filtration apparatus 6: electric heater

7: safety sensor 8: drain pipe (out)

9: inlet pipe 10: hot water tank

11: solenoid 12: temperature sensor

13: Inlet 14: Stirring tank

15: sump tank 16: insulation device

17: gear (large) 18: chain

19: gear (small)

[Purpose of invention]

The present invention relates to a method and apparatus for treating food waste, and more particularly, to an economical and efficient method and apparatus for decomposing and extinguishing food waste using medium temperature microorganisms and discharging it in a liquid state. .

[Technical field to which the invention belongs and the prior art in that field]

The present invention relates to a method and apparatus for discharging and disposing of food waste in a liquid state by using microorganisms.

Due to the rapid industrialization and urbanization, the generation of food waste from household waste was 15,075 tons / day in 1995, which is serious enough to account for 31.6% of the total household waste. However, the efficient way of dealing with this is carried out by methods such as weight reduction and recycling, and this is not a perfect way to solve the problem.

In addition, problems such as odor and leachate generated during storage and transportation after waste-based waste disposal are combined with Nimbism, which not only endangers the system of waste-based waste, but also destroys the environment and makes economic management difficult. It causes pollution of living water.

Until now, the prior art in this field has generally been a method of reducing food recycling to reduce or recycle, or to collect and landfill using garbage bags as it is now.

However, the problem with these two methods is that

First, to reduce and recycle

Many techniques and devices for fermenting food waste and recycling it as fertilizer and feed are introduced, but it is not suitable for use as fertilizer because of severe odor generated during fermentation (corruption) and Korean food contains high concentration of salt (NaCl). In addition, many nutrients such as protein are broken down and lost as feed. In fact, when used as a fertilizer is a situation where the plant dies because of the high concentration of salt.

Secondly, the existing devices mainly use thermophilic bacteria to speed up the decomposition of microorganisms, and excessive electricity is used because the temperature in the device must be maintained at 55 ℃ -65 ℃ at all times in order to reduce the volume of residue and lower the moisture content. Uneconomical

Third, the method of collecting and reclaiming only the food waste by separating the household waste is that the food waste is abundant due to soup and stew, which are the representative menus of Korean food. If this is contained in the trash bag, the odor is severely polluted during the landfill and transportation process, and landfill, and the amount of garbage is limited in each municipality to handle a large amount of garbage. Also causes many problems.

Accordingly, in the treatment of food waste, there is an urgent need to develop a technology capable of improving the existing method and efficiently managing the food waste.

[Technical problem to be achieved]

The present invention has been made to solve the above problems, the object of the present invention is

First, create a pleasant environment by eliminating odors in the process,

Second, to solve the discomfort of the secondary treatment by completely decomposing and extinguishing the residue of food waste generated during the primary treatment through microorganisms,

Third, by supplying hot water and maintaining a proper temperature to provide the optimum environment for the microorganisms to work,

Fourth, because the discharged water (treated water) is sent to the sewage treatment plant and manure treatment plant through sewage and septic tank, it becomes comprehensive management.

Fifth, we will fundamentally solve the food waste problem by avoiding the cost of secondary treatment (collection, landfilling, etc.) and environmental pollution by using much of the cost and effective land use.

[Configuration and Function of Invention]

In order to achieve the above object, the present invention, food waste is broken down into carbohydrates and lipids into carbon dioxide (CO ₂ ) and water by heterotropic microorganisms, protein is carbon dioxide (CO ₂ ) and water and ammonia gas (NH ₃ ) and decompose.

Representative heterotrophs used at this time include Bacillus licheniformis, Bacillus subtilis, Rhizopus sp., Pseudomonas fluorescens, etc. ₃ ) rarely occurs, Rhizopus sp. Decomposes cellulose and Pseudomonas fluorescens decomposes organic active substances such as surfactants.

Since the average temperature of the microorganisms in Korea is around 30 ℃ in summer, the microorganisms do not need to keep warm with heat generated during the decomposition of food waste by these microorganisms. A growing environment is provided, which is economical because it saves a lot of electricity costs, and by supplying adequate hot water every hour, it provides optimum conditions for these mesophilic microorganisms to decompose food waste in a state of sufficient moisture rather than dry state to near perfect level. Decompose And more importantly, since the microorganisms used do not harm the human body and the environment, and have a long survival time, convenience and economical efficiency have been improved because a long time decomposition effect is continued with one microorganism input.

On the other hand, the amount of water supplied during the day ranges from 1 to 30 times the weight of food waste put in during the day, and the reason why the hot water is supplied is that the main microorganisms used have flagella, This is because more active decomposition occurs. That is, the present invention is selected microorganisms capable of active activity under the environment in which hot water is supplied.

In order to facilitate this-Refer to the drawing of the oil attachment device-The heater of ⑥ is intended to keep the temperature of the stirring tank of ⑭ constant, but the heater of ⑥ is hot water of 때 when the water supply of ① is not performed in an enclosed space. Increase the temperature of the water in the tank and supply hot water to the agitator's agitator tank when the water supply in ① is automatically performed for 1 to 5 minutes every hour by the solenoid of the tank. By maintaining the temperature and supplying hot water at the same time to provide the optimum conditions for the microorganisms to work.

According to the present invention, in order to mix the microorganisms used, Bacillus licheniformis, Bacillus subtilis, Rhizopus sp. : It is preferable to mix adsorbent = 1: 1 to 1: 8 and incubate at 30 degreeC-50 degreeC for 15-48 hours in an incubator. At this time, as the adsorbent to be used, such as sesame, rice bran, bran, chaff.

In order to remove the odor, the odor generated during the decomposition process in the agitation tank is ammonia gas (NH ₃ ), which provides the cause of the odor. Less decomposed food waste is left in the agitator tank to physically solve the odor removal and complete decomposition by the device.

Food microorganisms may have slightly different decomposition time depending on the type of microorganisms, but are completely decomposed into water and gas in the apparatus within about 24 hours and discharged to the septic tank or sewer in the apparatus.

That is, food waste is disposed of as follows according to the present invention.

Example 1

The spawning agent selected by the present invention (microbial + adsorbent) was put into the apparatus and each kind of food waste was stirred twice every hour in the apparatus at 35 ° C.-38 ° C. with three times the volume of the spawning agent, and slightly stirred. The time to extinguish each food waste when supplying hot water is as follows.

Example 2

The spawning agent selected by the present invention (microbial + adsorbent) was put into the apparatus and each kind of food waste was stirred twice every hour in the apparatus at 35 ° C.-38 ° C. with three times the volume of the spawning agent, and slightly stirred. When asked about 10 people in an enclosed space, the degree of smell in the process of decomposing food waste when supplying hot water

(Comparative Example)

When 10 people were asked about the odor generated from a device that is fermented at about 60 ℃,

As in the two comparisons, it can be seen that there is no problem in the smell of the present invention.

Example 3

The seed material selected by the present invention was introduced into the apparatus, and each food waste was stirred twice every hour in the apparatus at 35 ° C.-38 ° C. at a triple volume ratio, and the BOD of the food waste was supplied when a little hot water was supplied upon stirring. (Biological oxygen demand) and SS (floating matter) are as follows.

(Comparative Example)

Compared to the different foods in the untreated liquid,

The BOD 240ppm and SS 330ppm of the treated water (drained water) are clean enough to be incomparable with the figures shown in (Comparative Example).

[Effects of the Invention]

As mentioned in the above [Example], through the present invention,

1. Since food waste is completely decomposed and extinguished without remaining residues, it is possible to reduce the inconvenience and uneconomical costs of secondary processing such as collection, landfill, or incineration.

2. Since food waste can be treated comprehensively in sewage treatment plant or manure treatment plant, systematic systematic management of living sewage can be achieved, thereby minimizing environmental damage.

3. It can improve the odor generated when storing and disposing of food waste at home or restaurant, etc., and can solve the community's pleasant environment and group complaints caused by food waste.

Claims (7)

A treatment method and a treatment device characterized in that the food wastes are agitated and decomposed and extinguished in a processing apparatus for supplying suitable hot water under a constant temperature condition to discharge them in a liquid state and remove odors using a selected spawning agent. The method according to claim 1, wherein the spawning agent is Bacillus licheniformis, Bacillus subtilis, Rhizopus sp. = 1: 1 to 1: 8 is mixed and incubated for 5 to 72 hours at 30 ℃ -50 ℃ in an incubator. The adsorbents used are generically manufactured using busy, rice bran, bran, rice husk, etc. The microorganism used in the treatment method and apparatus for dissipating, decomposing, and discharging under hot water supply conditions is a medium temperature having flagella in addition to the microorganism opened in claim 2. Microorganisms are mainly used. The method of claim 1, wherein the treatment method is a generic term for decomposing and extinguishing food waste in the apparatus of claim 5, using the spawning agent of claim 1, discharging it to a liquid phase, and sending it to sewage, septic tanks, and other treatment facilities. The treatment apparatus according to claim 1, wherein the treatment apparatus supplies the hot water in the apparatus by using the seed agent of claim 1 in a temperature of 30 DEG C-50 DEG C, a stirring speed of 1-30 revolutions / hour, and suitable hot water. General term for a device that decomposes and extinguishes waste and discharges it in liquid form. The suitable amount of hot water of claim 5 is 1 to 30 times the weight of food waste fed in one day. In the treatment apparatus according to claim 5, when discharging the treated water, the size of the hole of the filtration apparatus (diameter, oil content 'fourth degree') should be within 2ψ (diameter 2mm), and such filtration apparatus may be used several times. In any process, the diameter should be within 2ψ. The form is a curved shape or a straight plane.