KR101898892B1 - fermentation and destructing device for organic waste - Google Patents

Abstract

The present invention provides an organic waste fermentation device capable of economically and efficiently treating organic waste, which is a mixture of food waste and sewage sludge.

Description

Technical Field [0001] The present invention relates to a fermentation and destructing device for organic waste,

The present invention relates to an apparatus for fermentation destruction of organic wastes.

Recently, the amount of organic waste including food waste, sewage sludge and livestock manure has been increasing, and as the awareness of this trend has changed dramatically both in Korea and abroad, (2012), livestock manure (2012), food waste (2013), waste water (2013), and wastewater sludge (2016), starting with prohibition of land reclamation of food waste in January As marine emissions are regulated, the social demands and pressures on the treatment of these organic wastes are increasing. As a result, organic wastes have been reduced and recycled through drying or dehydration without landfilling directly.

Kinds
Moisture content
Generation Emission characteristics
Ton / day Ton / year 1. Sewage sludge 83% 10,000 3.5 million Sludge cake dehydrated from dehydrator at public sewage treatment plant 2. Wastewater sludge 82% 15,000 550 million Sludge cake dehydrated by a dehydrator at a wastewater treatment plant in an industrial or industrial complex 3. Livestock manure
(Money) 90% 60,000 20M Sludge cake with dehydration of slurry of pig manure discharged from livestock farmhouse 80% 4. Food waste 88% 13,000 5 million Households, restaurants, etc. Collected and transported vehicles that are collected and transported to public treatment facilities or private treatment facilities collected garbage 5. Wastewater 92% 10,000 3.5 million In the above vehicle or facility, the wastewater separated from the solid matter and the number of cleaning

However, food waste accounts for a large part of the waste generation in Korea, and it is generated in a state of high water due to characteristics of food culture. There are many methods of disposal, incineration, marine dumping, As marine dumping is banned, various methods have been tried to replace it. First, incineration is incomplete combustion due to high moisture content, so it is not easy to construct incinerator due to concern of residents about air pollution due to concern about emission of various harmful substances. There are feed conversion, composting, energy conversion, It is not easy due to the occurrence of livestock disease and various foreign substances. Composting is a negative phenomenon for compost products produced by soil accumulation of salts, which are especially contained in food wastes in Korea, and absorption failure of other components due to this, or lack of nutrients of crops The consumption of manufactured compost products is not active because of the visual sense. In addition, biogas production using food waste is facing many difficulties due to the content and quality of produced gas. In addition, in the method of supplying air in the fermenter in the organic waste treatment, most of the gang plates attached to the motor shafts are rotated, thereby mixing the raw materials and supplying the oxygen. However, it is difficult to apply to the raw materials exist. Therefore, it is possible to simplify the process by providing optimal C / N ratio through the mixing of food waste and sewage sludge and to introduce a process to reduce water content of high moisture content raw materials. In addition, It is very urgent to develop a technology to rapidly dissolve organic waste in a solid state rather than a liquid phase. Korean Patent Registration No. 0897722 discloses an apparatus for treating liquid waste generated from anaerobic digestion of organic wastes.

However, in the case of the prior art, there is a problem that the chemical is added to the extinguishing liquid externally in order to maintain the proper C / N ratio of the digestive juice, and the treated water must be neutralized again.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus for efficiently and economically disposing an organic waste fermentation solution, which is more efficient than the conventional method for solving various problems including the above problems. However, these problems are exemplary and do not limit the scope of the present invention.

 According to one aspect of the present invention, there is provided a food waste grinder; A first dehydrator for removing water from the pulverized food waste conveyed from the food waste pulverizer; A second dehydrator for removing moisture from the conveyed sewage sludge; A deodorizer for removing deodorized food waste conveyed from the first dehydrator and odor of the dehydrated sewage sludge transferred from the second dehydrator; A tank for mixing and fermenting the mixed raw materials, a screw pump for feeding the mixed raw materials fed from the hopper into the tank, a driving motor for stirring the mixed raw materials introduced into the tank, A shaft driven by a driving motor, a leaf sheet formed in a square shape on the shaft to agitate the mixed raw material from a lower portion of the tank to an upper portion thereof, a partition wall supporting the leaf piece, a deodorizer for removing odors and odors generated in the stirring and fermentation process A temperature sensor for sensing the internal temperature of the tank during the stirring and fermentation process, a moisture sensor for sensing the internal moisture of the tank during the stirring and fermentation process, a blower for discharging the air inside the tank to the outside, And a controller for controlling the blower, wherein the dehydrated and deodorized food waste deodorized in the deodorizer The dehydrating and deodorizing sewage sludge is mixed solid state fermentation process comprising a fermentation microorganism to be destroyed stirring, food waste and sewage sludge fermentation simultaneous extinction device is provided.

According to one embodiment of the present invention as described above, it is possible to realize the production effect of the organic waste fermentation destruction device capable of efficiently and economically treating organic waste, which is a mixture of food waste and sewage sludge. Of course, the scope of the present invention is not limited by these effects.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view schematically showing a treatment process of conventional food waste and sewage sludge; FIG.
FIG. 2 is a schematic view showing a process of quickly dissolving an organic waste mixed with food waste and sewage sludge according to an embodiment of the present invention through a fermentation microorganism agitator with a solid phase.
3 is a block diagram of a longitudinal type fermenting microorganism agitator according to an embodiment of the present invention.
FIG. 4 is a configuration diagram showing the composition of a raw material agitation and air supply device in a longitudinal type fermenting microorganism agitator according to an embodiment of the present invention.
5 is a photograph showing a state of a longitudinal type fermenting microorganism agitator of 50 kg with a treatment capacity according to an embodiment of the present invention.
6 is a photograph showing the state of sewage sludge before and after treatment according to an embodiment of the present invention.

Definition of Terms:

The term " organic waste " as used herein refers to wastes mainly composed of organic matter, among general and industrial wastes. Agricultural byproducts such as rice straw and barley straw, animal manure, human milk, bark, industrial wastewater sludge, food industry waste, and living sewage sludge. Organic waste is used as it is in the production of crops, and various obstacles may occur, and it is used by composting, composting and fermentation treatment.

The term " sewage sludge " as used herein refers to sludge that is generated in each step of sewage treatment and has a higher concentration of organic material than that of the recycled sludge. In a sewage treatment process such as an activated sludge process, raw sludge of the first sedimentation tank and waste sludge in the final sedimentation tank occur.

DETAILED DESCRIPTION OF THE INVENTION [

According to one aspect of the present invention, there is provided a food waste grinder; A first dehydrator for removing water from the pulverized food waste conveyed from the food waste pulverizer; A second dehydrator for removing moisture from the conveyed sewage sludge; A deodorizer for removing deodorized food waste conveyed from the first dehydrator and odor of the dehydrated sewage sludge transferred from the second dehydrator; A tank for mixing and fermenting the mixed raw materials, a screw pump for feeding the mixed raw materials fed from the hopper into the tank, a driving motor for stirring the mixed raw materials introduced into the tank, A shaft driven by a driving motor, a leaf sheet formed in a square shape on the shaft to agitate the mixed raw material from a lower portion of the tank to an upper portion thereof, a partition wall supporting the leaf piece, a deodorizer for removing odors and odors generated in the stirring and fermentation process A temperature sensor for sensing the internal temperature of the tank during the stirring and fermentation process, a moisture sensor for sensing the internal moisture of the tank during the stirring and fermentation process, a blower for discharging the air inside the tank to the outside, And a controller for controlling the blower, wherein the dehydrated and deodorized food waste deodorized in the deodorizer The dehydrating and deodorizing sewage sludge is mixed solid state fermentation process comprising a fermentation microorganism to be destroyed stirring, food waste and sewage sludge fermentation simultaneous extinction device is provided.

In the food waste and sewage sludge co-fermentation device, a plurality of air injection holes may be formed on the surface of the shaft, and air may be injected into the tank through the air injection holes to induce aerobicization .

The first dehydrator may be a screw dryer and the microorganism may be selected from the group consisting of Bacillus sp. , Selemonas sp. , Pseudomonas sp. , Streptomonas sp. , Or Lactobacillus sp. ).

Conventional sewage sludge treatment techniques are used for drying, solidification, incineration, melting, carbonization, composting, fueling, landfilling, and earthworm rearing. However, since the water content after dehydration is 83% There is an urgent need for effective water reducing technology that is economical because of excessive energy cost, excessive process odor and complex facilities. Considering the treatment of domestic organic wastes before and after the prohibition of marine dumping (see Table 2), it is very important for the society to handle the organic wastes such as food waste and sewage sludge, And technically, the technology of dehydrating and drying food waste is a key issue.

Kinds
Marine dumping
Prohibition time
Treatment Before marine dumping After prohibiting marine dumping Sewage sludge 2012.
01.01 ㅇ Marine dumping 60%
ㅇ Cement factory 20%
ㅇ Recycling of resources (compost, etc.) 20% ㅇ Local governments own processing facilities 70%
ㅇ Commitment to recycling (compost, etc.) 30% Processing cost 30,000 won / ton 120,000 won / ton Wastewater sludge 2016.
01.01 However,
ㅇ Cement factory 20%
ㅇ Recycling of resources (compost, etc.) 10% ㅇ Cement factory 50%
ㅇ Processing consignment (landfill, incineration) 30%
However, Processing cost 30,000 won / ton 100,000 won / ton Livestock manure 2012.
01.01 ㅇ Recycling (compost, liquid) 80%
ㅇ Public treatment (purification linkage) 10%
However, ㅇ Individualization of resources (compost, liquid) 40%
ㅇ Joint resource reclamation (compost, liquid) 30%
ㅇ Public treatment (purification linkage) 27%
ㅇ Energy conversion (biogas) 3% Processing cost 20,000 won / ton 30,000 won / ton Food waste 2013.
01.01 ㅇ Civilization (compost, feed) 60%
ㅇ Public resources (compost, feed) 40% ㅇ Public resources (compost, feed) 70%
ㅇ Civilization (compost, feed) 30% Processing cost 70,000 won / ton 120,000 won / ton Waste water 2013.
01.01 However,
ㅇ Public treatment (purification linkage) 10% ㅇ Public treatment (purification linkage) 80%
ㅇ Private treatment (connection of wastewater leachate) 10%
ㅇ Energy conversion (biogas) 10% Processing cost 30,000 won / ton 120,000 won / ton

However, the dehydration technique developed to solve the above problems still shows a high water content after dewatering (see Table 3). Even in the case of the electro-osmotic system with a very low water content, which has recently been developed with the new technology, the operation cost is still excessively spent and it is difficult to use it as a general purpose other than sewage sludge. In addition, recently, the anaerobic digestion process emerging in a new direction has a low C / N ratio of the liquid wastes, resulting in a high cost in the post-treatment process.

Kinds Dehydration principle  Dehydration water content Remarks 1. Belt press Filter cloth 83% Excessive maintenance 2. Decanter Centrifugation 85% Excessive driving noise 3. Screw Press Screw compression force 70% Usage limit for paper mill 4. Filter press Compression force of filter cloth 70% Driving inconvenience 5. Electro Penetration Electrophoresis and osmosis 60% Spending on driving expenses

* Water content before dehydration is 98%

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic view schematically showing a treatment process of conventional food waste and sewage sludge; FIG. In general, there have been various methods of disposing of food waste, such as landfill, incineration, marine dumping, and reclamation. However, since food waste is directly buried and marine dumping is prohibited, various methods have been tried to replace it. As shown in FIG. 1, there is a method of foddering or composting food waste through crushing, washing and drying processes as part of the recycling of food waste, and in the case of sewage sludge, a first dehydration, a second dehydration and drying process There is a way to utilize it as composting, fueling, landfill or construction material. However, as mentioned above, food waste in Korea is high in high carbohydrate content, high water content and salt content, while sewage sludge has low carbohydrate content and high protein content Each raw material is not easy to recycle as well as landfill and incineration due to unbalance of C / N ratio, high water content, high salt concentration, viscosity and density problem, irregular amount of occurrence, various foreign matter, and feed conversion and composting. Particularly, food waste is irregular and includes various foreign substances, and there is a problem that feed conversion is not easy due to occurrence of livestock diseases. Composting also has a negative view on the compost products produced by soil accumulation of salts, which are especially contained in food waste in Korea, and absorption failure of other constituents and lack of nutrients of crops, so consumption of manufactured compost products is active It is not in the state.

The present inventors have recognized the problems of the above-mentioned food waste and sewage sludge disposal, and as a result, have found that they provide an ideal C / N ratio by controlling the mixture ratio of food waste and sewage sludge having different nutritional balances, Through the water content reduction technology which provides a constant water content by changing the method of dehydration, it is possible to provide the best fermentation condition to efficiently supply the air in the solid phase state, and thereby to improve the efficiency of the organic solid matter of food waste and sewage sludge It has developed a large-scale treatment method of solid waste fermentation microbial agitation and extinction which can guarantee the efficiency and economical efficiency of eliminating it from the solid state.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more thorough and complete, and will fully convey the concept of the invention to those skilled in the art. In the drawings, the thickness and size of each layer are exaggerated for convenience and clarity of explanation.

It is to be understood that throughout the specification, when an element such as a film, region or substrate is referred to as being "on", "connected to", "laminated" or "coupled to" another element, It will be appreciated that elements may be directly "on", "connected", "laminated" or "coupled" to another element, or there may be other elements intervening therebetween. On the other hand, when one element is referred to as being "directly on", "directly connected", or "directly coupled" to another element, it is interpreted that there are no other components intervening therebetween do. A uniform code refers to a uniform element. As used herein, the term " and / or " includes any and all combinations of one or more of the listed items.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

Also, relative terms such as "top" or "above" and "under" or "below" can be used herein to describe the relationship of certain elements to other elements as illustrated in the Figures. Relative terms are intended to include different orientations of the device in addition to those depicted in the Figures. For example, in the figures the elements are turned over so that the elements depicted as being on the top surface of the other elements are oriented on the bottom surface of the other elements. Thus, the example "top" may include both "under" and "top" directions depending on the particular orientation of the figure. If the elements are oriented in different directions (rotated 90 degrees with respect to the other direction), the relative descriptions used herein can be interpreted accordingly.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise " and / or " comprising " when used herein should be interpreted as specifying the presence of stated shapes, numbers, steps, operations, elements, elements, and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Hereinafter, embodiments of the present invention will be described with reference to the drawings schematically showing ideal embodiments of the present invention. In the figures, for example, variations in the shape shown may be expected, depending on manufacturing techniques and / or tolerances. Accordingly, the embodiments of the present invention should not be construed as limited to the particular shapes of the regions shown herein, but should include, for example, changes in shape resulting from manufacturing.

FIG. 2 is a schematic view schematically showing a process for mass-treating organic wastes using the longitudinal-type fermentation microorganism agitator 40 according to an embodiment of the present invention. Generally, food waste is sent to the fermentation process after grinding and dewatering process. However, the sewage sludge is firstly dewatered at the public sewage treatment plant, is introduced into the sewage sludge storage tank and then is transferred to the fermentation process through second dehydration. More specifically, the food waste discharged from houses, apartments, restaurants, etc. is transported by the food waste collecting vehicle to the food waste storage tank 10, where the food waste and food wastes leachate are carried separately and have a high water content of 90%. The introduced food wastes are introduced into a crusher 20 and subjected to a crushing process. The crusher 20 for the crushing process may be crushed by a conventional mechanical crushing method.

The pulverized food waste is conveyed to the first dehydrator 30 for dehydration, wherein the first dehydrator 30 is preferably a screw dry type. The water content of the food waste after the pulverizing process and the dehydration process is reduced to about 75%. The odor, odor and gas generated in the dehydration process are suctioned through the deodorizer 70, The food waste having the reduced water content is put into a seed type fermentation microorganism agitator 40 to be fed in a predetermined amount and subjected to a fermentation process.

On the other hand, the sewage sludge is introduced into the sewage sludge storage tank 50 in the form of a sludge cake after the first dehydration process is completed with a dehydrator at a public sewage treatment plant by a conveying vehicle or a conveyor belt. Since the sewage sludge still has a high water content of 85%, it flows directly into the second dehydrator 60 to perform the second dehydration process. At this time, the dehydration method of the second dehydrator 60 can be an electroosmotic method or a screw dry method, and the water content of the sewage sludge after dehydration is reduced to 75%. In general, raw materials having a high water content are the most difficult to recycle food waste and sewage sludge. In the massive organic waste disposal method of the present invention, a water content reduction technique that provides a constant water content by varying the dehydration method depending on the characteristics of each raw material Thereby providing the best fermentation conditions for efficiently supplying air in a solid state and thus efficiently and economically disposing a large amount of mixed organic solids of food waste and sewage sludge several times faster than treating a single raw material ≪ / RTI >

Sewage sludge disposal process Like the food waste disposal process, the odor and gas generated in the dehydration process are sucked through the deodorizer 70 and are subjected to a deodorization process and then discharged as odorless exhaust gas. At this time, ) Can be applied to a commercial deodorization system using basic metal ions or chemicals or a biological deodorization system using microorganisms. After the dewatering process is completed and the water content of the sludge is reduced, the sewage sludge is fed into the seed type fermentation microorganism agitator 40 in a predetermined amount to undergo a fermentation process.

When the fermented microorganism is agitated in the fermentation microorganism agitator 40 for the fermentation process, the general mixing ratio of the dehydrated food waste and the sewage sludge is 1: 0.5 to 1.5, 1: 0.7 to 1.3 or 1: 0.8 to 1.2 But is not limited thereto. In addition, it is possible to provide optimum C / N ratio, which is one of the fermentation conditions, by adjusting the mixing ratio according to the characteristics (C / N ratio) of food waste and sewage sludge. nitrogen ratio (C / N ratio) may be 15 to 45, 20 to 40, or 25 to 30, but this is not restrictive. After that, the organic waste material in which the food waste and the sewage sludge are mixed at an appropriate ratio is transferred to a hopper (not shown), and a predetermined amount of the mixed raw materials is mixed with the microorganism agitated by the controller (not shown) And is input to the extinction device 40. The configuration for the fermentation process will be described in detail with reference to FIG.

The fermentation process proceeds through humus 80 below the seed type fermentation microorganism agitator 40 and the moisture inside the seed type fermentation microorganism agitation extinction device 40 by heat of fermentation And organic matter is decomposed and extinguished (90), but the remaining residue is not destroyed and treated as a composting agent. The strains showing aerobic, anaerobic, or horseradish biochemical characteristics constituting the Muthus 80 are mainly Bacillus sp. , Selemonas sp. , Pseudomonas sp. May be composed of Streptomonas sp. Or Lactobacillus sp . There is an advantage that the fermentation microorganism can be treated to provide a best fermentation condition as a mineral nutrient supply source for decomposing microorganisms to decompose salts contained in food waste. Of these strains, Bacillus sp. Isolates were isolated from traditional Korean fermented foods. Lactobacillus sp. Were isolated from domestic kimchi. Halophilic bacteria were isolated from crushed oyster piles discharged from the oyster shell factory of.

FIG. 3 shows a configuration diagram of a longitudinal type fermenting microorganism agitator 40 according to an embodiment of the present invention. The type of fermentation microorganism agitator 40 of the present invention has an advantage that it can be installed in three dimensions in a small site by optimizing the construction. Referring to FIG. 3, . First, a seed-type fermentation microorganism agitator 40 is provided with a hopper 130 through which a food waste and a sewage sludge mixed raw material are introduced, a tank 150 for stirring the mixed raw material, and a hopper 130, And a screw pump 120 for inputting the molten metal into the mold 150. The inner wall of the tank 150 is made of a stainless steel material capable of withstanding various corrosive gases generated from mixed raw materials of salt and organic waste contained in food wastes in Korea and a temperature control jacket (Not shown) and an outer wall, and a confirmation window 40-5 is formed on the left upper side of the outer wall to visually confirm the fermentation process. The structure of the tank 150 is an openable and closable type that can be cleaned at any time, thus enabling efficient management.

A shaft (shaft) 40-1 for stirring the mixed raw materials fed from the screw pump 120 in a solid state and supplying air through a plurality of air injection holes 40-4 is disposed in the tank 150 A driving motor 140 for driving the shaft 40-1 and a driving motor 140 for driving the shaft 40-1 at a predetermined height from the bottom of the tank 150, And a partition wall 40-2 of a vertical screw pump for separating the raw material is formed outside the leaf piece 40-3 of the screw pump.

Meanwhile, a deodorizer 70 for removing the odor generated in the dehydration and stirring process is formed at the upper center of the seed-type fermentation microorganism agitator 40, and is connected to the deodorizer 70 to discharge the odorless exhaust gas A gas outlet 70-1 is formed. Generally, food waste and sewage sludge organic waste mixed raw materials loaded from the hopper 130 are automatically and continuously supplied by a screw pump 120 within a range of moisture content of 40 to 65%. As described above, conventionally, the anaerobic digestion treatment has been carried out in liquid form due to the problem that the supply of air is not smooth during the treatment of solid organic wastes. However, in the massive treatment method of organic wastes according to the present invention, Through the water content reduction process that provides the water content, solid organic waste is converted into solid organic waste by providing the best fermentation condition by selecting the method of moving the whole raw material while supplying air from the screw shaft instead of the conventional method of rotating the organic wastes. It can be processed rapidly and in large quantities.

FIG. 4 is a schematic view showing the composition of the raw material stirring and the air supply device of the seed-type fermenting microorganism agitator 40 of the present invention for the fermentation process. Generally, supplying air to the organic waste mixed raw material is an essential element in the fermentation process and plays a role of regulating the temperature or evaporating water. Conventionally, in the conventional organic waste treatment method, not only the raw material agitation and the air supply but also the air supply method in the fermenter, a method of rotating the gangue plate, which is a wing formed in four directions on the motor shaft, is mixed to feed the air from the gangway plate blade shaft . However, depending on the rotation of the gauge plate when stirring the raw material with a high water content, some anaerobic reactions are caused due to the nonuniformity of air supply only at the rotating part of the gauge plate. However, in the air supply device of the longitudinal type fermentation microorganism agitator 40 of the present invention, the shaft 40-1 driven by the drive motor 140 is connected to the partition wall 40-2 of the screw pump and the leaf- 40-3 so that air is uniformly injected through the air injection holes 40-4 formed in the shaft 40-1 between the gaps, . Therefore, the air flow 40-6 flows in the reverse direction from the bottom to the bottom, and the raw material 40-7 that has risen backward by the screw pump has an appropriate moisture content, and the extra water vapor and exhaust gas generated during the stirring process are deodorized (70). However, since too much air supply interferes with the fermentation process, the current sensed by the temperature sensor (not shown) and the moisture sensor (not shown) adjusts the speed of the blower 100 through the controller 110, The entire raw material of the solid phase is mixed while supplying the optimum air while providing the optimum water content, thereby providing the best fermentation conditions.

Hereinafter, the present invention will be described in more detail by way of examples. It should be understood, however, that the invention is not limited to the disclosed embodiments, but may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, Is provided to fully inform the user.

Example 1: Experiments on the ability to treat organic wastes

(Water content 85%) discharged from ordinary households and sewage sludge (water content 74%) generated in the Gwangju 2nd sewage terminal treatment plant by using the seed type fermentation microorganism agitation extinction device 40 of the present invention (treatment capacity 50 kg) (1,000 g) inoculated with the fermented microorganism was added to the mixture, and the weight change, that is, the processing ratio, was observed with time depending on the raw material mixing ratio. The throughput does not indicate the decomposition and removal rate of the organic matter but means the degree to which moisture of the excess sludge is removed by indirect thermal energy generated upon decomposition of the organic matter to be reduced.

As a result, as shown in the following Table 4, when the food was 500 g and the sewage sludge: 500 g, the highest treatment ability was shown to disappear after 30 hours, followed by the disappearance of 600 g of food and 400 g of sewage sludge after 33 hours And 400g of food and 600g of sewage sludge, respectively. Theoretically, it was expected that the optimum treatment result would be obtained when the mixing ratio of food waste and sewage sludge was 6: 4, but it was the most efficient at 5: 5 weight ratio. This is probably due to the fact that the origin of the food waste used in the experiment was different.

      time
ratio 12h 24h 30h 36h Remarks Food: 1,000 g
Sewage: 0 g 700 390 250 188 Food: 0 g
Sewage: 1,000 g 740 480 350 220 Food: 800 g
Sewage: 200 g 670 350 225 172 Food: 700 g
Sewage: 300 g 640 320 115 46 Food: 600 g
Sewage: 400 g 715 250 84 extinction 33h annihilation Food: 500 g
Sewage: 500 g 600 200 extinction extinction 30h annihilation Food: 400 g
Sewage: 600 g 695 272 121 extinction 33h annihilation Food: 300 g
Sewage: 700 g 640 320 212 135 Food: 200 g
Sewage: 800 g 670 385 247 162

Example 2: Observation of weight change by singly or in combination

Based on the experimental results of the Lab scale of Example 1 above, the pilot scale-type fermenting microorganism agitator (FIG. 5) was scaled up to attempt repetition. Based on the result of 1: 1 obtained in Example 1 above, 50 kg of a fermented microorganism inoculated with 50 kg of a sample was added to 50 kg of the fermented microorganism.

As a result, as shown in the following Table 5, when the food waste was treated at a rate of 50 kg, all of the food waste disappeared after 30 hours, and the weight of the food waste disappeared after 36 hours in the case of 50 kg of sewage sludge, When 25 kg of garbage and 25 kg of sewage sludge were mixed, they disappeared after 20 hours. Thus, it was confirmed that solid organic wastes were treated quickly and efficiently (FIG. 6).

time
ratio 6h 12h 18h 20h 24h 30h 36h Remarks Food waste 50 kg 35 20 12 8 4 0 - 30h
extinction Sewage sludge
50 kg 37 24 18 14 11 6 0 36h
extinction Food waste: 25 kg
Sewage sludge: 25 kg 30 10 3 0 - - - 20h annihilation

In conclusion, by using the organic waste fermentation extinction device of the present invention, the food waste and sewage sludge, which have different water content and nutrient balance and contain a lot of high salt, It is possible to economically and efficiently treat a large amount of solid organic wastes mixed raw materials by providing an optimal C / N ratio through controlling the water content and mixing ratio of the solid organic wastes.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims. Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

40-1: Shaft
40-2: Partition of the screw pump
40-3: Leaves of screw pump
40-4: air injection hole
40-5: Confirmation Window
40-6: Flow of air
40-7: Rising raw materials
70: Deodorizer
70-1: gas outlet
100: blower
110:
120: screw pump
130: Hopper
140: drive motor
150: tank

Claims (5)

Food waste grinder;
A first dehydrator for removing water from the pulverized food waste conveyed from the food waste pulverizer;
A second dehydrator for removing moisture from the conveyed sewage sludge;
A deodorizer for removing deodorized food waste conveyed from the first dehydrator and odor of the dehydrated sewage sludge transferred from the second dehydrator;
A tank for mixing and fermenting the mixed raw materials, a screw pump for feeding the mixed raw materials fed from the hopper into the tank, a driving motor for stirring the mixed raw materials introduced into the tank, A shaft driven by a driving motor, a leaf sheet formed in a square shape on the shaft to agitate the mixed raw material from a lower portion of the tank to an upper portion thereof, a partition wall supporting the leaf piece, a deodorizer for removing odors and odors generated in the stirring and fermentation process A temperature sensor for sensing the internal temperature of the tank during the stirring and fermentation process, a moisture sensor for sensing the internal moisture of the tank during the stirring and fermentation process, a blower for discharging the air inside the tank to the outside, And a controller for controlling the blower, wherein the dehydrated and deodorized food waste deodorized in the deodorizer Dehydrating and food waste and sewage sludge fermentation simultaneous destruction apparatus including a deodorizing sewage sludge is mixed solid fermentation process fermenting microorganism stirred disappearance of group. The method according to claim 1,
Wherein a plurality of air injection holes are formed on the surface of the shaft. 3. The method of claim 2,
Wherein the air is injected into the tank through the air injection hole to induce aerobicization of the food waste and sewage sludge. The method according to claim 1,
The first dehydrator is a device for simultaneous fermentation and dismantling of a screw dryer, food waste and sewage sludge. The method according to claim 1,
The microorganism is selected from the group consisting of Bacillus sp . , Selemonas sp . ), Pseudomonas species (Pseudomonas sp.), Pseudomonas genus Streptomyces (Streptomonas sp . ) Or Lactobacillus sp. , A device for simultaneous fermentation and disposal of food waste and sewage sludge.

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