KR20200100912A - Organic waste treatment system with odor gas control - Google Patents

Abstract

The present invention relates to an organic waste treatment system in which odor gas is controlled. In this case, an organic waste treatment system combined with an odor gas control system includes a fermentation tank (10), a heating jacket (20), a warm air supply unit (30), and an odor treatment unit (40), as main elements, to simultaneously operate a treatment device that rapidly evaporates the moisture of organic wastes to dramatically improve throughput and capacity, and an odor control device for controlling moisture by using a cooling system for high-temperature and high-humidity gas generated when moisture evaporates, and controlling odor gas by spraying fine particles of water and using multiple adsorbents.

Description

Organic waste treatment system with odor gas control}

The present invention relates to an organic waste treatment system in which odor gas is controlled, and more particularly, a treatment device that rapidly evaporates moisture from organic waste to dramatically improve throughput and treatment capacity, and a high temperature and high humidity gas generated by evaporation of moisture. The present invention relates to an organic waste treatment system in which odor gas is controlled by controlling moisture using a cooling system, and an odor control device that controls odor gas using multiple adsorbents and spraying fine particles of water at the same time.

In general, an organic waste treatment system is a system that treats food waste generated in a living environment. Such a treatment system is sold on the market, but the price is high to be sold for general commercial use. And, because of the occurrence of a lot of odor, it cannot be easily used in restaurants where food sales are the main business, and the daily throughput is limited to 100 kg or less, so it cannot be used in medium-sized food processing companies.

Accordingly, in the conventionally disclosed Patent Registration No. 10-1017616, a method for controlling a food waste disposal unit includes a housing that forms a food waste treatment space and has a food inlet and a food outlet, a cutting bracket mounted on the housing so as to protrude into the food treatment space, Impeller having a blade formed to cut and agitate food by interaction with the cutting bracket, one side is convex and one side is concave, food that operates to selectively open and close the food outlet An emission control unit, and a heater installed in the housing to heat the housing, detecting a temperature of exhaust gas discharged from the food treatment space, detecting a temperature of the heater, Controlling an on-off operation of the heater based on a temperature and a temperature of the heater, and a rotation direction of the impeller and the impeller based on a ratio of the time at which the heater is controlled to be turned on There has been a pre-registered technology that includes the step of adjusting the operating time and the operation time.

These conventional food waste disposers are reluctant to install in residential areas and restaurants as there is a problem of generating odor in the process of use, and most of them are collected and treated jointly, and facilities that treat food waste In the case, even if the odor was removed, the efficiency of removing the odor was low, resulting in an aversion to the treatment facility.

On the other hand, organic waste classified as food waste contains a large amount of moisture (about 80% or more), and it decays in a short time and generates odor. In order to solve this problem, a system that processes locally in a short time is required. Therefore, it is necessary to continuously develop a system that combines a system that simultaneously controls the odor generated and a processor that biologically ferments and destroys food by using the most efficient and eco-friendly technique. The developed system is small, medium, and large. Due to the supply to food processing companies and small, medium, and large food sellers, the development of eco-friendly treatment technology for food waste is urgent.

Accordingly, the present invention was conceived to solve the above problems, and the hydrophilic odor substances (ammonia, hydrogen sulfide, methyl mercaptan) contained most in organic wastes such as food waste were first controlled by moisture control, and then the adsorbent was used. It is used to absorb residual odor substances, so that odor efficiency is improved, and moisture evaporation is shortened due to high-temperature fermentation, so that the range of organic waste treatment is broadly extended to livestock manure, fish, farmed fish, as well as sludge at the end of sewage treatment plant. As organic waste is introduced without pretreatment and odorless gas is released to the atmosphere after treatment, the generation of secondary pollutants is prevented, and the microbial carrier used for organic waste treatment is recycled as a high-quality organic compost or soil improvement agent to generate additional profits. Its purpose is to provide a controlled organic waste treatment system.

In order to achieve this object, a characteristic of the present invention is a fermentation tank 10 in which organic waste is stored and a plurality of stirring blades 12 are provided to rotate around the stirring shaft 14; A heating jacket (20) installed on the outer wall of the fermentation tank (10) to store heat medium oil, and provided with a heater (22) for heating heat medium oil; It is composed of an air line 32 installed in the inner space of the heating jacket 20, and a plurality of nozzles 34 connected to the air line 32 to supply air into the fermentation tank 10, and the air line ( A hot air supply unit 30 provided to heat the air transported by riding on it by heat exchange with the heat medium oil; And an odor treatment unit 40 provided to collect and deodorize the fermentation gas generated in the fermentation tank 10.

At this time, the nozzles 34 are disposed on the left and right sides of the bottom of the fermentation tank 10 around the stirring shaft 14, and the left and right nozzles 34 are opposite to each other so that the wind direction is toward the center of the bottom of the fermentation tank 10. It is arranged as, and any one of the left and right nozzles 34 is characterized in that it is provided so that warm air is sprayed in a direction opposite to the rotational direction of the stirring blade 12.

In addition, the odor treatment unit 40 includes a treatment tank 42 that collects fermentation gas generated in the fermentation tank 10 through a duct 41, and sprays water as fine particles through a nozzle 43 to cool the fermentation gas. And a moisture control unit 44 for adsorbing and separating malodorous components including ammonia and acetaldehyde, a condensing unit 46 for cooling and collecting moisture contained in the fermented gas that has passed through the moisture control unit 44, and a condensing unit 46. ), an activated carbon adsorption unit 48 for adsorbing and treating malodorous components contained in the fermentation gas passing through), and a water circulation unit 49 for pumping the water collected in the treatment tank 42 and supplying it to the nozzle 43 It characterized in that it is made by doing.

According to the above configuration and action, the present invention absorbs residual malodorous substances using an adsorbent after primary control of the hydrophilic malodorous substances (ammonia, hydrogen sulfide, methyl mercaptan) contained in the most organic wastes such as food waste. Therefore, the odor efficiency is improved, and water evaporation is shortened due to high-temperature fermentation, so that the range of organic waste treatment is broadly extended to livestock manure, fish, farmed fish, as well as sludge at the end of sewage treatment plant. In particular, all organic wastes are introduced without pretreatment. Therefore, since the odorless gas is released into the atmosphere after treatment, the generation of secondary pollutants is prevented, and the microbial carrier used for organic waste treatment is recycled as a high-quality organic compost or soil conditioner to generate additional profits.

1 is a block diagram showing an organic waste treatment system in which odor gas is controlled according to an embodiment of the present invention.
2 is a block diagram showing an internal structure of an organic waste treatment system in which odor gas is controlled according to an embodiment of the present invention.
3 to 4 are configuration diagrams showing an activated carbon adsorption unit of an organic waste treatment system in which odor gas is controlled according to an embodiment of the present invention.
5 to 17 are test data related to an organic waste treatment system in which odor gas is controlled according to an embodiment of the present invention.

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

The present invention relates to an organic waste treatment system in which odor gas is controlled, wherein the organic waste treatment system combined with the odor gas control system rapidly evaporates moisture from the organic waste, thereby dramatically improving throughput and treatment capacity, and A fermentation tank (10), heating to control moisture by using a cooling system to control moisture of the high-temperature and high-humidity gas generated during evaporation, and to simultaneously operate an odor control device that controls odor gas using water particulates and multiple adsorbents. It consists of a main configuration including a jacket 20, a warm air supply unit 30, and an odor treatment unit 40.

In the organic waste treatment system in which odor gas is controlled according to the present invention, as shown in FIG. 1, organic waste is stored, and a plurality of stirring blades 12 are provided to rotate around a stirring shaft 14. ); A heating jacket (20) installed on the outer wall of the fermentation tank (10) to store heat medium oil, and provided with a heater (22) for heating heat medium oil; It is composed of an air line 32 installed in the inner space of the heating jacket 20, and a plurality of nozzles 34 connected to the air line 32 to supply air into the fermentation tank 10, and the air line ( A hot air supply unit 30 provided to heat the air transported by riding on it by heat exchange with the heat medium oil; And an odor treatment unit 40 provided to collect and deodorize fermented gas generated in the fermentation tank 10.

In FIG. 2, the nozzle 34 is disposed on the left and right sides of the bottom of the fermentation tank 10 around the stirring shaft 14, and the left and right nozzles 34 have the wind direction toward the center of the bottom of the fermentation tank 10. Arranged in opposite directions to each other, any one of the left and right nozzles 34 is provided so that warm air is sprayed in a direction opposite to the rotational direction of the stirring blade 12.

In the organic waste treatment system in which odor gas is controlled according to the present invention, the decomposition treatment of organic matter by microorganisms is a method of decomposing organic matter such as food waste into water and carbon dioxide by utilizing the characteristics of microorganisms. It is a technology being developed. Using this technique, an apparatus for fermentation and extinction treatment of organic waste in the present invention was manufactured at 80°C, which is the temperature at which the fermentation of microorganisms is the most active. In addition, among organic wastes, in particular, it is based on food waste, which is the most closely related to general life while causing enormous secondary damage such as wastewater and odor, which is the most generated based on the total amount of pollution.

In particular, food wastes are not discontinued wastes such as sewage sludge and livestock manure, but all foods that can be consumed by humans are wastes that are in the process of decay, so they are composed of very strong odors, high moisture content and salt, and fibers that are difficult to decompose. Since it is the most difficult organic waste, food waste, which is an organic waste with such characteristics, is fermented and destroyed in a high temperature environment.

In addition, the fermentation tank 10 according to the present invention creates a heat medium oil heating jacket 20 on the outside, and heat resistance is maintained by inserting the heater 22 and the air line 32 into the heating jacket 20 in the same space. , It was manufactured so as not to require a separate heat source for supply of warm air, and the nozzle 34 is a stirring shaft that rotates forward/reverse by fixing the wind direction toward the center of the fermentation tank 10 as shown in the enlarged view of FIG. Regardless of the direction of (14), it was manufactured to always obtain a constant fermentation quality.

In addition, the air line 32 is manufactured so that there is no problem during future maintenance by making it possible to open and close with a stopper in case a smooth air volume is not exhibited by this material.

In addition, with the stirring shaft 14 as a single axis, a rib 11 is welded to the inner wall of the fermentation tank 10 corresponding to the between the stirring blades 12 spaced apart from the stirring shaft 14. / Regardless of the reverse rotation, organic waste is made to be crushed finely between the stirring blades 12 and the ribs 11, and this part is prevented from agglomeration when the microbial carrier and waste are mixed when the moisture content is high.

In addition, when the heating jacket 20 is finished, since the air line 32 is located inside the heating jacket 20 heated by the heater 22, a separate heating device is not required, so economical and efficient warm air Can be supplied into the fermentation tank.

In addition, in order to prevent heat loss of the heating jacket 20, heat loss was minimized by wrapping the entire fermentation tank (including the side) excluding the ceiling part with insulation and finishing.

In addition, if the fermentation tank 10 is insulated only in the U-shaped direction in which it is rolled, the temperature change inside the fermentation tank 10 due to the heat loss resulting from the side that is not insulated may vary depending on the season and the input object. The fluctuation is large. In particular, the fermentation tank 10 in the present invention was manufactured in consideration of a portion requiring side insulation in order to facilitate the treatment of microorganisms by maintaining about 75 to 80°C.

In addition, in the fermentation tank according to the present invention, since adequate moisture and adequate oxygen supply are the most important factors in order for aerobic microorganisms to enter into fermentation, in the present invention, an apparatus for supplying oxygen to aerobic microorganisms was devised and manufactured in an innovative way.

The stainless steel plate serving as the fermentation tank 10 was cut by CNC, and then a hole was drilled and rolled so that a nozzle could be inserted, and the nozzles 34 consist of a total of 4 rows. In addition, each row has a total of 9 nozzles 34, and all 36 air nozzles 34 protrude from the bottom surface of the fermentation tank 10 so that the wind direction is directed toward the center as shown in the enlarged view of FIG. 2.

In addition, there are 10 stirring blades 12 welded to the stirring shaft 14, and are welded at intervals of 126 mm, and nozzles 32 are provided on the inner wall of the fermentation tank 10 corresponding to the center of the stirring blade 12. ) Are located, and the stirring blade 12 rotates so that warm air is constantly supplied during stirring. In addition, the effect of water evaporation due to oxygen can be exhibited. And, since the air line 32 is inserted into the heat medium oil that always maintains 80℃, it is possible to supply hot air inside the fermentation tank 10 without a separate heat source, and the blower B used is also equipped with an inverter to And it is possible to adjust the air volume so as to correspond to the processed object, and individually controlled by attaching a valve to each nozzle (34).

That is, in the equipment room provided on one side of the fermentation tank 10, a blower (B) and an air line (32) for supplying oxygen to the fermentation tank (10), a stirring motor (M) that rotates the stirring shaft (14), all equipment The control box that controls the device was positioned, and the blower (B) and the air supply distribution box (D) were located in the upper right space in order to effectively utilize the narrow equipment room. And, it was manufactured to supply oxygen to the fermentation tank 10 and the air line 32 directly from the air supply distribution box (D) through a heat-resistant hose. The efficiency of oxygen supply is improved by individually connecting each air line 32 to the air line of the fermentation tank 10. Apart from being able to control the air volume of the blower (B) by attaching an inverter, a valve is attached to allow individual and delicate air volume control.

On the other hand, the control box for controlling all the electrical equipment used in the present invention is a stirring motor (M) in charge of stirring, a blower (B) for supplying oxygen, a heater 22 for heating heat medium oil, and a fermentation tank 10 ) And a sensor that manages the temperature of the heating medium oil, etc., so that the internal process can be operated automatically. As an example, briefly explaining the operation flow of the control box, in the case of an example of the operation of the device (heat medium oil temperature setting 80), 1) when the agitation set value is on-2 hours, off-1 hour: After stirring in forward rotation for 2 hours Stirring for 1 hour is set to rest, 2) 2 hours in reverse rotation for 4 hours, and then set to rest for 1 hour.

In the operation flow of the present invention using this, 1) input of the operation button, 2) the blower operates before the stirrer (to prevent the inflow of foreign substances into the nozzle by stirring), 3) the stirrer operates after about 5 to 10 seconds ( Forward rotation), 4) Food waste input, 5) Fermentation tank temperature dropped to 65 due to food input (assuming), 6) The sensor detects the temperature drop and heats the jacket containing the heat medium oil, 7) After 2 hours forward rotation and stirring Pause for 1 hour (again, stirring stops first and then the blower is stopped to prevent foreign substances from entering the nozzle), 8) When the blower is operated for 4 hours, the agitator rotates in reverse and the rest of the process repeats 3) and 8) above. Is done.

And after setting the stirring time and air volume according to the season and the propensity of the input by operating the timer and the inverter, press the blue button (full automatic operation button) on the screen once, and after that the device repeats the above flow for optimal It was configured to ferment and decompose organic waste with fermentation quality, and an emergency stop button and manual mode were also added to make unspeakable situations and maintenance convenient.

On the other hand, in the case of the heater with the most electricity consumption, it is possible to operate the device economically by interlocking with the sensor of the heat medium oil by controlling the SCR (silicon controlled rectifier) to use only the minimum current value required for the jacket set temperature.

3 to 4, the odor treatment unit 40 includes a treatment tank 42 for collecting fermentation gas generated in the fermentation tank 10 through a duct 41, and water into fine particles through a nozzle 43. A moisture control unit 44 that cools the fermentation gas by spraying and adsorbs and separates odor components including ammonia and acetaldehyde, and a condensation unit 46 that cools and collects moisture contained in the fermentation gas that has passed through the moisture control unit 44. , Activated carbon adsorption unit 48 for adsorbing and treating malodorous components contained in the fermentation gas passing through the condensing unit 46, and a water circulation unit for pumping water collected in the treatment tank 42 and supplying it to the nozzle 43 It includes (49).

The types of malodorous substances specified in accordance with the Environmental Law were identified, and the standards and ranges for each substance were identified, and are shown in FIGS. 5 to 6. The measurement of odor substances is carried out by the analysis method and the sensory method using an instrument according to the domestic law. In this research project, the measurement method using an instrument was applied.

Food waste, which is an organic compound, is mainly composed of sugars, fats, and proteins, and when such food waste is decomposed into aerobic microorganisms, it reacts with oxygen and water and causes ammonia (NH3) and acetaldehyde (CH3CHO), which are the main causes of odor, Methyl mercaptan (CH3SH) and hydrogen sulfide (HS) are generated. In this research project, ammonia (NH3), methylmercaptan (CH3SH), and hydrogen sulfide (HS) were selected among a total of 12 designated odor substances and selected as materials for application of treatment technology. All substances presented in 6 were analyzed using an accredited certification body.

Among organic waste (food waste) treatment devices currently on the market, a biofilter method, an adsorption method using activated carbon, and a combustion method (using a platinum catalyst) were used as a result of investigating devices equipped with an odor control system. However, in the case of the biofilter method, if organic waste is not continuously supplied, internal microorganisms are killed, and there is a disadvantage in that more organic gases including odor gases can be discharged by microorganisms. In addition, the combustion method is widely used to remove local waste, and is in the spotlight as an eco-friendly method that utilizes heat generated during combustion, but it has a disadvantage that the purchase price is high for use in small and medium-sized processing companies and food stores. Therefore, it is decided to use activated carbon, which is widely used because it is readily available on the market, is easy to replace, and generally has the highest adsorption efficiency.

In addition, since all designated odor substances including selected odor substances have hydrophilic properties that dissolve in water, the adsorption technology using water was also applied. In addition, the increased humidity due to the adsorption technology using a large amount of moisture and water generated in the process of decomposing organic waste impairs the adsorption performance of activated carbon, so an internal cooling system is applied to re-liquefy the water vapor. When passing through, it was applied to pass at a temperature of about 40°C or less.

In FIG. 7, an odor treatment experiment was conducted by self-producing an adsorption system using activated carbon and water as an internal system. Before injection of odorous substances, the system operation was judged using benzene, toluene, ethylbenzene, and xylene, which are the most widely used substances for research purposes.

As shown in FIG. 8, as a result of the system operation for a total of 120 minutes, the adsorption efficiency of benzene was 75% on average, and the adsorption efficiency of toluene, ethylbenzene, and xylene all showed more than 96%, confirming that there was no problem. Adsorption efficiency tests for ammonia were conducted using the above two systems. As shown in FIG. 9, in the case of activated carbon, ammonia was subjected to a control efficiency test for 120 minutes and then an experiment for 8 hours in which organic waste was decomposed. 10 is a result of an experiment using water for 8 hours. In the case of activated carbon, 0.5 ppm was injected and the adsorption efficiency test was conducted for 120 minutes. As a result, about 0.1 to 0.2 ppm decreased to 0.4 and 0.3 ppm, and the result of 8 hours was similar. Even when water was used, the control efficiency of activated carbon was similar.

This result is judged that there is no significant change in the control efficiency because the concentration of injected ammonia is low. In the case of hydrogen sulfide and methyl mercaptan, an adsorption test using activated carbon was conducted. In FIG. 11, the experiment was conducted twice for a total of 120 minutes and 8 hours using the same system as ammonia.

In the case of hydrogen sulfide and methyl mercaptan, control was performed immediately after input of the target material, but it was confirmed as not detected. In this part, it was judged that both hydrogen sulfide and methyl mercaptan were adsorbed well, so an adsorption-centered odor control system was designed.

Since ammonia, which is the main cause of odor, is a hydrophilic substance, if it is controlled by spraying in the form of ultrafine particles that maximize the surface area of water, the content of the remaining odor components is insignificant and sufficient effects can be obtained only by adsorption. The system was produced based on. However, since the water injection system may change to steam instead of water due to the large amount of moisture and high temperature generated when organic waste fermentation disappears, it was manufactured in consideration of moisture control.

Therefore, the details of the hybrid odor control system to be performed in this task are as follows.

1) When food waste is put into the fermentation tank 10, the stirring blade 12 operates and fermentation of the food waste begins to generate fermentation gas.

2) Inflow into the moisture control unit 44 of the odor treatment tank 40 due to the pressure of the gas from the sealed fermentation tank 10.

3) Partial cooling of the high-temperature fermentation gas by spraying water particles through the nozzle 43 and odor components of ammonia and acetaldehyde are adsorbed.

4) At this time, the water sprayed by the nozzle 43 is collected from hot and humid steam during the fermentation process and reused for circulation.

5) The unadsorbed odor gas among the gases adsorbed by moisture flows into the activated carbon adsorption unit 48. At this time, high-temperature moisture from the cooled fermentation gas while passing through the condensation unit 46 with the Peltier element attached is re-collected to the water below, and only odor gas with relatively low moisture flows into the activated carbon adsorption unit 48 .

And, as shown in Fig. 4 (a) so that moisture can be sprayed in all directions as fine particles from the top, it was manufactured with two nozzles 43.

The condensing part 46 to which the Peltier element for cooling is applied was constructed using two as shown in FIG. 3 (b). The Peltier device is the most utilized as a recent cooling system, and is a device that can cool up to 15 degrees using low power. However, in the present invention, the high-temperature gas generated from the organic waste system is instantaneously cooled to induce condensation to occur, thereby reducing the relative humidity in the air.

In the case of the adsorption part using activated carbon, the injected activated carbon part did not leak out to the generated air flow path, and was made into a cartridge so that it can be easily replaced when used for a long time later, and it is incorporated inside.

-Fermentation tank moisture content, fermentation extinction rate, power consumption, processing capacity, volume

The manufactured system was evaluated by the K-Mark quality certification standard (hereinafter referred to as certification), which is a waste process test standard, under the supervision of the Korea Industrial Technology Testing Institute under the Ministry of Commerce, Industry and Energy, and for this reason, the detailed explanation data of the business plan submitted at the beginning of the project It served as an opportunity to identify errors in the performance indicator target. In addition, the fermentation tank moisture content, power consumption, and volume, which were indicated by self-measurement on the detailed explanation data of the previously submitted business plan, were evaluated by the Korea Institute of Industrial Technology, thus securing public confidence. The results for each performance index are shown in FIG. 12.

Just as completely dried foods do not spoil, moisture is like the path of microbial movement. If there is too little moisture, microbial activity is reduced, and if there is too much moisture, aerobic microbes are blocked and the activity stops. Therefore, maintenance of proper moisture is a very important part in fermentation performance. As a result of the moisture content of the fermentation tank, 17.46% means that the fermenter always maintains the carrier of microorganisms, which is three times the volume of the input, at the level of 17.46%.If the microbial carrier is about 85% of food waste, it is about 102%. It is adjusted to the moisture content and returns to 17.46% when the treatment is completed. Therefore, the optimal range of moisture content for treating food waste is at least 15% to less than 40%, but it is good to put it in a state of low moisture content when a large amount of seasonal fruit waste is generated, such as in the summer when evaluation was conducted. Fermentation quality can be expected.

The reduction rate of 85.5% is currently the highest in the country, and microorganisms that are active at high temperatures realize superior fermentation performance by adding an artificial supply of oxygen. In the system manufactured as shown in FIG. 13, since fermentation proceeds at a high temperature, a whole raw chicken that cannot be decomposed by a general food waste handler could be put into the fermentation and extinguished. In addition, not only food waste but also organic waste can be treated, and carcasses of animals such as raw chicken and fish have much less water content than food waste, so time is not wasted for water evaporation, so it can be decomposed at a faster rate. Can be put in.

Certification Standard Power Consumption Calculation Method Since the standard is stated to be less than 110% of the total displayed power consumption, it is indicated that there is no standard for 50 kw proposed in the initial plan, and when the characteristics of the device and electrical load are considered. The power consumption test was changed under the advice of the Korea Testing Institute, that one of the items that must be evaluated is the power consumption item. The total displayed power consumption of the watt-hour meter installed in this device at the Korea Industrial Technology Test Center was 58.7 kwh/day, which was 106.7% of the displayed power consumption.

-Odor substances (ammonia, hydrogen sulfide, methyl mercaptan, etc.)

In FIGS. 14 to 16, analysis was performed once before passing through the odor control system, 1 hour after passing, and 5 hours after passing through the odor control system during the organic waste treatment process at an accredited certification institution (Keumo Institute of Technology). In addition to ammonia, hydrogen sulfide, and methyl mercaptan in the protocol, 12 designated odor substances and complex odors were also analyzed.

In the case of ammonia, it was confirmed that the control efficiency was high as time passed, and it was expected to exceed the development target on an 8-hour basis when organic waste was completely destroyed. However, in the case of hydrogen sulfide and methyl mercaptan, there was a similar or lowered phenomenon.In this part, a high concentration of odor substances did not appear during the fermentation extinction process in the organic waste apparatus, and accordingly, the concentration of the substance passed through the odor control system was reduced. In order to achieve the goals in the plan, it is expected that the figures should be almost undetected. At the time of analysis, the test was conducted at the Korea Institute of Industrial Technology, an accredited certification body for organic waste treatment systems, for one week in a row, and the odor control system did not exchange water and activated carbon (4 consecutive days). If activated carbon and water were replaced in the control system, it is believed that the results exceeded the target value.

- Technical performance

Recently, organic waste devices, which are widely used in small and medium-sized food processing companies, including large apartment complexes, have a sense of rejection due to various reasons such as cost burden, odor, and power consumption. And, organic waste devices currently on the market are mostly limited to food waste. The organic waste device developed in this research project was developed as a device that can treat most of organic waste as well as food waste, and was developed to control odor substances. And, since it is formed at a relatively low price point compared to other products, it will have a lot of utilization.

In particular, the technology that can treat most of the organic waste has a high temperature with the intrinsic microorganisms of the host organization, but has a technical peculiarity that does not consume much power. And, it is judged that the low-temperature technology using the Peltier element, which is used as an advanced cooling system as well as activated carbon, has advanced system cooling technology as well as deodorization at a low price. Microbial, high temperature, cooling, adsorption technology is not only environmental technology, but also other mechanical technologies. It is expected to be applicable to technology.

-Realization of zero wastewater treatment cost in food and logistics waste treatment business

Under the current Waste Management Act, companies that process food wastes intermediate/final are largely classified into composting and feed processing, and both must have facilities above a certain level prescribed by the law in order to obtain permission. Accordingly, the law stipulates the hopper, shredding/sorting machine, and dehydrator as essential facilities for permission. Accordingly, all companies inevitably go through the process of hopper-crushing / sorting-dehydration, and the drinking water generated at this time is classified as an ultra-high concentration pollutant. Therefore, in order to treat the drinking water, which is an ultra-high concentration pollutant, it is necessary to pay 70,000 won to 130,000 won/ton to the wastewater treatment company, and the amount that food waste treatment companies in Daegu Gyeongbuk region currently receive as treatment costs is on average 110,000. It is won/ton. The following is a simple monthly income calculation based on a treatment plant that treats food waste with a daily throughput of 50 tons.

Income from processing cost: 50ton X 110,000 won = 5,500,000 won

Wastewater treatment expenditure: 34ton X 80,000 won = 2,720,000 won

Grounds for calculating wastewater treatment cost

=(daily carry-on amount X average moisture content of food waste)-average load rate of dehydrator

=(50ton X 85%)-20% = 34ton

Average wastewater treatment cost is applied

As in the above example, the generation of wastewater is indispensable in treating food waste, and since it has to be treated onshore after the London Convention, about 50% of income is spent only as a simple wastewater treatment cost. Profits deteriorate further when labor costs are excluded, and the Nakdong River, like the Daegu-Gyeongbuk region, is not free from the total water pollution system, so there is no place to receive and treat drinking water at the wastewater treatment plant operated by the local government. In addition, it is said that the treatment cost of drinking water will increase further from next year, so the economic fatigue of the company is expected to reach an extreme.

Therefore, our large-scale processor is Korea's only fermentation and extinction processor in ton units, and is the only manufacturer that can manufacture fermentation and extinction devices capable of processing up to 4-6 tons by adjusting the moisture content. With the introduction, the cost of wastewater treatment, which was half of the income, can be preserved intact, and a very stable management can be achieved.

The device manufactured through this research project is in discussion with the food waste company that conducted the test for the large-sized aircraft, and it is being discussed that the test will be conducted as soon as possible within the year and introduced upon success. do.

-Reduction of social costs

The current treatment method for food waste is a collection of discharges/transportation intermediate/final treatment. This is a system that collects and transports waste to an integrated treatment plant far from the city, not a method of treatment at the source of discharge. Therefore, the government is investing astronomical costs in the cost of collecting/transporting the waste to the plant for processing and processing it in the plant. However, instead of collecting food waste, the method of immediately disposing of food waste at the source where it is generated is the most ideal way to treat food waste, so if the device for this task can be installed at the source of discharging, it is possible to dispose of food waste immediately. Not only can it reduce social costs, but it is thought that it can be an opportunity to bring about a shift in the perception of residents about the environment and food waste.

-Recycling with the highest quality organic compost

The economic value of food resources discarded as food waste is approaching 15 trillion won per year. Another problem currently faced by companies that produce compost from food waste is the treatment of sediments that accumulate in large post/composting tanks. These sediments become raw materials for compost and must be packaged and sold in 20 kg bags, but most of them are of poor quality. It has so poor quality that it cannot be called organic compost. In addition, since most of these composts are not sold in the post-compost group, they are only neglected. In order to improve the quality of these composts, another cost must be invested, and even if the cost is invested, the compost suitable for the quality standard cannot be produced. It appears as a big problem as an enemy. In particular, items such as moisture content and hydrogen ion concentration are relatively easy to adjust, so they are not a big problem, but the items that are most difficult to meet the quality standards are the amount of organic matter and the ratio of organic matter to nitrogen.

Accordingly, in order to recycle the carrier used for fermentation and extinction as compost while proceeding with this task, the quality of compost was also evaluated using the Korea Testing Laboratory, and the evaluation quality is as shown in FIG. 17.

All items other than the hydrogen ion concentration were passed with very good values, and this is a quality that can be called about twice as much as the amount of organic matter is so abundant that it is mixed with other subsidiary materials such as sawdust and meets the standards for organic compost set by the law. It can be called this. This indicates that the analysis was performed without any additional processing, so if only the hydrogen ion concentration is slightly increased, it can be said that it can be said to be qualified as a very good organic compost.

Under the current fertilizer management law, organic compost contains 5% of inorganic matter, so if you mix a little lime within 5% for hydrogen ion concentration, you can produce the highest quality organic compost without any special processing and cost. After spraying the microorganisms used in food waste into large-sized post/composting tanks in the farm where compost is made, the food wastes are fermented and destroyed without wastewater, and the carriers can be sold as high-quality compost, the ultimate in maximizing profits. It is considered as a resource recycling method. In addition, in the case of the four major heavy metals, only 1/500 of the standard value is detected, so it can be said that it can be recycled as organic compost with the highest quality.

-Sales and recycling of quality compost

After taking over the food waste treatment business, a huge amount of used microbial carriers will be generated, which will be used to realize additional profits through recycling after recycling as organic compost and soil conditioner that is very rich in organic matter.

In the present invention, a device capable of treating organic waste was manufactured by combining an odor gas control system. The manufactured device is judged to be an innovative device that has been verified by an accredited agency in various areas such as higher efficiency, higher composting, lower cost, eco-friendly treatment, and reduction of odor generation than many treatment devices currently on sale. It was manufactured so that a large amount of organic waste could be treated in a short time through integrated control using the host organization's own microorganisms, and the moisture contained in the organic waste was also vaporized to prevent wastewater generation. In addition, it was developed as an eco-friendly device that can reduce the occurrence of odor by using water and activated carbon, which can easily obtain a large amount of odor substances contained in water vapor. In particular, water and activated carbon are easily replaced by consumers in the future, and incidentally, it has been carried out so that additional profits can be expected through A/S to vendors. In addition, since the internal configuration of the system has been simplified to enable low power consumption and production in the size desired by consumers, the sales and economic benefits of the host institution are expected to be high.

In addition, since it has been proven that the performance indicator verified by the accredited agency through the present invention exhibits superior performance than any models of other companies, it is convinced that good results will be obtained if actively utilized. Even in the face of increasingly stringent environmental regulations, the treatment method for food waste, which contains the most difficult secondary pollutants such as odor and wastewater, and measures to prevent the secondary pollutants, are issues that the current government is also paying attention to. . Already in Jeju Island, the amount of food waste generated explosively increased due to the increase of the population and tourists, but it took a considerable amount of time to expand new public treatment facilities due to insufficient processing capacity of food waste public treatment facilities. In order to solve this problem, local governments are taking off their feet in the spread of fermentation, decomposition, and extinction devices or reducers like the equipment of this task. Therefore, in Jeju Island, when purchasing a fermentation extinguisher or weight reduction period, subsidies are provided at the local government level to treat food waste at the source and induce resource conversion. In particular, in the case of Jeju Island, the range and amount ratio of the support targets are 80% for social welfare facilities, 70% for apartment houses, and 50% for large-discharge businesses such as restaurants and group meals. In such local government-level dissemination projects, securing reliability of devices from authorized organizations is expected to act as the most important purchasing factor.

Accordingly, the device of the present invention is considered to have high business feasibility because it can very efficiently control and block odors and wastewater, which are serious secondary pollutants of food waste, even under strict current environmental regulations.

Currently, in the case of factories that collect food waste, the equipment developed in the present invention is the only device capable of fermenting food in a ton scale, because the treatment cost of food waste water, which is determined to be increased next year, is a problem. And, if the technology of the present invention is applied, the generation of wastewater can be blocked at the source, and odor can be easily controlled.

10: fermentation tank 20: heating jacket
30: warm air supply unit 40: odor treatment unit

Claims (3)

A fermentation tank 10 in which organic waste is stored and a plurality of stirring blades 12 are provided to rotate about the stirring shaft 14 therein;
A heating jacket (20) installed on the outer wall of the fermentation tank (10) to store heat medium oil, and provided with a heater (22) for heating heat medium oil;
It is composed of an air line 32 installed in the inner space of the heating jacket 20, and a plurality of nozzles 34 connected to the air line 32 to supply air into the fermentation tank 10, and the air line ( A hot air supply unit 30 provided to heat the air transported by riding on it by heat exchange with the heat medium oil;
An organic waste treatment system comprising an odor treatment unit 40 provided to collect and deodorize the fermentation gas generated in the fermentation tank 10. The method of claim 1,
The nozzles 34 are arranged on the left and right sides of the bottom of the fermentation tank 10 around the stirring shaft 14, and the left and right nozzles 34 are arranged in opposite directions so that the wind direction is directed toward the center of the bottom of the fermentation tank 10. Thus, any one of the left and right nozzles 34 is provided so that warm air is sprayed in a direction opposite to the rotational direction of the stirring blade 12. An organic waste treatment system in which odorous gas is controlled. The method of claim 1,
The odor treatment unit 40 includes a treatment tank 42 that collects fermentation gas generated in the fermentation tank 10 through a duct 41 and sprays water as fine particles through a nozzle 43 to cool the fermentation gas and ammonia. , A moisture control unit 44 for adsorbing and separating odor components including acetaldehyde, a condensing unit 46 for cooling and collecting moisture contained in the fermented gas passing through the moisture control unit 44, and a condensing unit 46. An activated carbon adsorption unit 48 for adsorbing and treating malodorous components contained in the passed fermentation gas, and a water circulation unit 49 for pumping the water collected in the treatment tank 42 and supplying it to the nozzle 43. An organic waste treatment system in which odor gas is controlled.

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