Apparatus for manufacturing fertilizer from biodegradable plastic mixed by food waste and method thereof

Abstract

An embodiment of the present invention provides a food waste mixed type biodegradable plastic fertilizer manufacturing apparatus comprising: a raw material input unit into which food waste and biodegradable plastic are respectively input; a raw material processing unit that dries and weighs the input food waste, crushes and processes the input biodegradable plastic, and weighs the processed biodegradable plastic; a mixing unit that generates a mixture including the weighed food waste and the weighed biodegradable plastic; and a fertilizer generating unit that cures the generated mixture by drying and fermenting it, and generates fertilizer from the cured mixture using useful microorganisms.

Description

Technology Field

[0001] The present invention relates to an apparatus and method for manufacturing a food waste-mixed biodegradable plastic fertilizer, and more specifically, to an apparatus and method for manufacturing a food waste-mixed biodegradable plastic fertilizer that can increase biodegradability and effectively supply fertilizer by promoting the growth of microorganisms based on food waste and biodegradable plastic. Background Technology

[0002] Recently, environmental issues regarding the indiscriminate use of disposable products are being recognized as a serious social problem worldwide. 359 million tons of plastic are produced globally every year, of which half—150 million to 200 million tons—are dumped into landfills or nature.

[0003] Biodegradable plastics based on the decomposition of microorganisms are gaining attention as a solution to address environmental problems caused by the increased use of plastics. According to market research firm 360i Research, the global biodegradable plastics market is projected to grow from $5.1 billion (approximately 5.6814 trillion won) in 2020 to $8.9 billion (approximately 9.9146 trillion won) in 2025, doubling in value.

[0004] Meanwhile, as conventional plastic products are being replaced by biodegradable plastics, problems regarding the landfilling of biodegradable plastics have arisen. As a solution to these landfilling issues, the method of using biodegradable plastics as fertilizer is being actively researched. Biodegradable plastic fertilizer is considered the ultimate solution to the landfilling problem of biodegradable plastics because it can supply fertilizer to the soil as it decomposes based on materials containing fertilizer components.

[0005] However, biodegradable plastics are typically buried directly in the soil to be used as fertilizer. In other words, there is a problem in that it is difficult to utilize biodegradable plastics as soil fertilizer within a short period of time through simple landfill methods. Therefore, there is a need to develop technologies that can effectively supply fertilizer with high biodegradability by processing biodegradable plastics or carrying out additional composting processes. The problem to be solved

[0006] The technical problem to be solved by the present invention is to a biodegradable plastic fertilizer manufacturing apparatus and method capable of increasing biodegradability and effectively supplying fertilizer by promoting the growth of microorganisms based on food waste and biodegradable plastics.

[0007] In addition, the technical problem to be solved by the present invention relates to an apparatus and method for manufacturing biodegradable plastic fertilizer that can increase the expression rate by activating microorganisms contained in food waste by introducing useful microorganisms and rice flour.

[0008] The technical problems that the present invention aims to solve are not limited to those mentioned above, and other unmentioned technical problems will be clearly understood by those skilled in the art to which the present invention belongs from the description below. means of solving the problem

[0009] To achieve the above technical objective, an embodiment of the present invention may include: a raw material input unit into which food waste and biodegradable plastic are respectively input; a raw material processing unit that dries and weighs the input food waste, crushes and processes the input biodegradable plastic, and weighs the processed biodegradable plastic; a mixing unit that generates a mixture comprising the weighed food waste and the weighed biodegradable plastic; and a fertilizer generating unit that cures the generated mixture by drying and fermenting it, and produces fertilizer from the cured mixture using useful microorganisms.

[0010] The above biodegradable plastic is a rice-based biodegradable composite resin composition, and the above food waste promotes the enzymatic conversion of the rice, and the above fertilizer can be produced by the rice activating the above beneficial microorganisms.

[0011] The above raw material processing unit may include: a food waste drying unit that dries the food waste to lower its moisture and salt content; a first automatic weighing unit that weighs the dried food waste according to preset conditions or weighs it based on the specific gravity of the weighed biodegradable plastic; a biodegradable plastic processing unit that crushes and processes the biodegradable plastic according to preset conditions; and a second automatic weighing unit that weighs the processed biodegradable plastic according to preset conditions or weighs it based on the specific gravity of the weighed food waste.

[0012] It may further include an EM input section for introducing the above-mentioned useful microorganisms formed in liquid form; and a rice flour input section for introducing rice flour containing surplus rice.

[0013] The above EM input unit can spray the useful microorganisms by adjusting the amount based on the measured amount of biodegradable plastic or by adjusting it according to user requirements.

[0014] The above-mentioned rice flour input unit can be controlled to input the rice flour when the amount of the input biodegradable plastic is below a standard value.

[0015] The above mixing unit can produce the mixture by mixing the input food waste, the biodegradable plastic, the useful microorganisms, and the rice flour, and can produce the mixture in powder form by fermenting and drying the mixture using a temperature control device and a humidity control device.

[0016] The above mixing unit can control the internal temperature to 20 to 58 degrees using the temperature control device and control the internal humidity to 50% to 90% using the humidity control device, and ferment and dry for a minimum of 1 hour to a maximum of 24 hours.

[0017] The above fertilizer generating unit can control the internal temperature to within 20 to 58 degrees using a temperature control device.

[0018] In addition, to achieve the above technical objective, an embodiment of the present invention may include: a) a step of introducing food waste and biodegradable plastic into a biodegradable plastic fertilizer manufacturing device; b) a step in which the biodegradable plastic fertilizer manufacturing device dries and weighs the introduced food waste, crushes and processes the introduced biodegradable plastic, and weighs the processed biodegradable plastic; c) a step in which the biodegradable plastic fertilizer manufacturing device produces a mixture comprising the weighed food waste and the weighed biodegradable plastic; and d) a step in which the biodegradable plastic fertilizer manufacturing device cures the produced mixture by drying and fermenting it, and produces the cured mixture as fertilizer using useful microorganisms.

[0019] The above step b) may include: a step of drying the food waste to lower the moisture content and salt content; a step of weighing the dried food waste according to preset conditions or based on the specific gravity of the weighed biodegradable plastic; a step of crushing and processing the biodegradable plastic according to preset conditions; and a step of weighing the processed biodegradable plastic according to preset conditions or based on the specific gravity of the weighed food waste.

[0020] It may further include the step of introducing useful microorganisms formed in liquid form; and the step of introducing rice flour containing surplus rice.

[0021] The step of introducing the above-mentioned useful microorganisms may involve spraying the useful microorganisms by adjusting the amount introduced based on the measured amount of biodegradable plastic or by adjusting it according to user requirements.

[0022] The step of adding rice flour can be controlled so that the rice flour is added when the amount of the added biodegradable plastic is below a standard value.

[0023] Step c) above can be produced in powder form by mixing the input food waste, the biodegradable plastic, the useful microorganisms, and the rice flour to create the mixture, and by fermenting and drying the mixture using a temperature control device and a humidity control device.

[0024] Step c) above can be performed by controlling the internal temperature to 20 to 58 degrees using the temperature control device and controlling the internal humidity to 50% to 90% using the humidity control device, and fermenting and drying for a minimum of 1 hour to a maximum of 24 hours.

[0025] Step d) above can control the internal temperature to within 20 to 58 degrees using the temperature control device. Effects of the invention

[0026] According to an embodiment of the present invention, biodegradable plastic treated with food waste can promote microbial growth through a natural foaming process by mixing and reacting with microorganisms growing from the food. As a result, it can form a microbial community beneficial to the soil, provide a faster decomposition effect than conventional biodegradable plastic, and serve as a fertilizer beneficial to the soil.

[0027] In addition, according to an embodiment of the present invention, effective microorganisms (EM) and rice flour may be added to increase the microbial rate or to include more beneficial microorganisms. Here, by adding effective microorganisms, microbial expression can be maximized when the biodegradable plastic is fermented for fertilizer use. Furthermore, since it is possible to activate microorganisms contained in food waste by adding rice flour, other types of biodegradable plastics can also be used.

[0028] The effects of the present invention are not limited to the effects described above, and should be understood to include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims. Brief explanation of the drawing

[0029] FIG. 1 is a diagram illustrating an overview of a biodegradable plastic fertilizer manufacturing apparatus according to an embodiment of the present invention. FIG. 2 is a diagram illustrating the configuration of a biodegradable plastic fertilizer manufacturing device according to an embodiment of the present invention. FIG. 3 is a diagram illustrating a method for producing a fertilizer based on biodegradable plastic according to an embodiment of the present invention. FIG. 4 is a drawing illustrating a method for treating food waste and biodegradable plastics according to an embodiment of the present invention. FIG. 5 is a diagram illustrating a method of mixing food waste and biodegradable plastic according to an embodiment of the present invention. Specific details for implementing the invention

[0030] The present invention will be described below with reference to the attached drawings. However, the present invention may be implemented in various different forms and is therefore not limited to the embodiments described herein. Furthermore, in order to clearly explain the present invention in the drawings, parts unrelated to the explanation have been omitted, and similar parts throughout the specification have been given similar reference numerals.

[0031] Throughout the specification, when it is stated that a part is "connected (connected, in contact, combined)" with another part, this includes not only cases where they are "directly connected," but also cases where they are "indirectly connected" with other members interposed between them. Furthermore, when it is stated that a part "includes" a certain component, this means that, unless specifically stated otherwise, it does not exclude other components but rather allows for the inclusion of additional components.

[0032] The terms used herein are merely for describing specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this specification, terms such as “comprising” or “having” are intended to indicate the presence of the features, numbers, steps, actions, components, parts, or combinations thereof described in the specification, and should be understood as not precluding the existence or addition of one or more other features, numbers, steps, actions, components, parts, or combinations thereof.

[0033] Embodiments of the present invention will be described in detail below with reference to the attached drawings.

[0034] FIG. 1 is a diagram illustrating an overview of a biodegradable plastic fertilizer manufacturing apparatus according to an embodiment of the present invention.

[0035] Referring to FIG. 1, food waste (10) and biodegradable plastic (20) can be introduced into a biodegradable plastic fertilizer manufacturing device (100). Here, the biodegradable plastic (20) treated together with the food waste (10) can be mixed with microorganisms growing from the food and promote the growth of microorganisms through a natural fermentation process via reactions such as sulfonine bio, fatty acid bio, and starch bio. Accordingly, the biodegradable plastic (20) treated together with the food waste (10) can form a microbial community beneficial to the soil, and can be composed of a fertilizer beneficial to the soil with a faster decomposition effect than general biodegradable plastic.

[0036] Meanwhile, the biodegradable plastic fertilizer manufacturing device (100) can process the input food waste (10) and biodegradable plastic (20) to mix them. For example, the biodegradable plastic fertilizer manufacturing device (100) can dry the input food waste (10). In addition, the biodegradable plastic fertilizer manufacturing device (100) can crush the input biodegradable plastic (20). The processed food waste (10) and biodegradable plastic (20) can be automatically weighed and mixed according to preset conditions.

[0037] Additionally, the biodegradable plastic fertilizer manufacturing device (100) can form the food waste (10) and biodegradable plastic (20) into a powder form by performing a fermentation and drying process to better mix the measured food waste (10) and biodegradable plastic (20). For example, the biodegradable plastic fertilizer manufacturing device (100) can carry out the fermentation and drying within a minimum of 1 hour to a maximum of 24 hours.

[0038] Meanwhile, the biodegradable plastic fertilizer manufacturing device (100) may introduce effective microorganisms (EM) to increase the microbial rate or to include more beneficial microorganisms. Effective microorganisms provide the effect of maximizing microbial expression when the biodegradable plastic is fermented for fertilizer use. In particular, effective microorganisms generated from a material related to grains from which the biodegradable plastic is derived maximize the aforementioned microbial expression, thereby providing effects such as improved antioxidant growth, self-arrival of decaying microorganisms, and utilization of intermediate microorganisms.

[0039] Additionally, the biodegradable plastic fertilizer manufacturing device (100) can activate microorganisms contained in food waste (10) by introducing rice flour. By doing so, the biodegradable plastic fertilizer manufacturing device (100) can also make other types of biodegradable plastics available. Here, the introduced rice flour may be in the form of surplus rice flour, and since it is a natural resource, it can be naturally decomposed by microorganisms in the natural world.

[0040] In addition, the biodegradable plastic fertilizer manufacturing device (100) can produce fertilizer by drying and fermenting the mixed raw materials.

[0041] FIG. 2 is a diagram illustrating the configuration of a biodegradable plastic fertilizer manufacturing device according to an embodiment of the present invention.

[0042] As illustrated in FIG. 2, a biodegradable plastic fertilizer manufacturing device (100) may include a raw material input section (110), a raw material processing section (120), an EM input section (130), a rice flour input section (140), a mixing section (150), and a fertilizer generating section (160).

[0043] First, the raw material input section (110) may include a food waste input section (111) and a biodegradable plastic input section (112). Food waste may be input into the food waste input section (111). Since food waste is an organic material and contains sufficient nutrients, microorganisms may be expressed.

[0044] Additionally, the biodegradable plastic input section (112) may accept biodegradable plastic. For example, the biodegradable plastic may be formed from a rice-based biodegradable composite resin composition. That is, food waste promotes the enzymatic reaction of rice in the biodegradable plastic, and the rice can activate microorganisms contained in the food waste. Additionally, the biodegradable plastic input section (112) may accept biodegradable plastic product waste. When biodegradable plastic product waste is accepted, environmental pollution can be further prevented.

[0045] The raw material processing unit (120) may include a food waste drying unit (121), a first automatic weighing unit (122), a biodegradable plastic processing unit (123), and a second automatic weighing unit (124).

[0046] The food waste drying unit (121) can dry the input food waste. By drying the food waste, the food waste drying unit (121) can reduce the moisture content, thereby removing odors and delaying the time of decay. Additionally, the food waste drying unit (121) can reduce the salt content through drying. Since the salt contained in the food waste not only causes poor growth of crops but also deteriorates the soil environment, a desalination process to remove salt is required. For example, the food waste drying unit (121) can dry the food waste using methods such as heat, centrifugal separation, and dehydration.

[0047] The first automatic weighing unit (122) can automatically weigh the amount of food waste to introduce microorganisms in an appropriate ratio. The first automatic weighing unit (122) can adjust the amount of food waste according to preset conditions.

[0048] The biodegradable plastic processing unit (123) can crush the input biodegradable plastic. The biodegradable plastic processing unit (123) can process the biodegradable plastic into an appropriate size by crushing it. For example, the biodegradable plastic processing unit (123) can process the biodegradable plastic into a size of 30 µm to 10 mm according to preset conditions. In addition, the biodegradable plastic processing unit (123) can crush the biodegradable plastic by means of impact, cutting, compression, and shearing.

[0049] The second automatic weighing unit (124) can automatically weigh processed biodegradable plastic. The second automatic weighing unit (124) can weigh biodegradable plastic according to preset conditions. Additionally, the second automatic weighing unit (124) can adjust the amount of biodegradable plastic based on the specific gravity of food waste weighed by the first automatic weighing unit (122). Furthermore, it is possible to weigh biodegradable plastic according to preset conditions in the second automatic weighing unit (124) and weigh food waste in the first automatic weighing unit (122) based on the specific gravity of the weighed biodegradable plastic.

[0050] The EM input unit (130) can inject effective microorganisms (EM). The EM input unit (130) can adjust the amount of effective microorganisms injected based on the measured amount of biodegradable plastic. For example, the effective microorganisms are based on a liquid form and may include commercial liquid raw materials that can be used for eco-friendly fermented liquid raw materials and other fertilizers. The EM input unit (130) can adjust the injection amount according to user requirements. By doing so, the rate of microbial expression can be increased when the biodegradable plastic is fermented for fertilizer use.

[0051] Additionally, the rice flour input unit (140) can input rice flour. For example, the rice flour input unit (140) can be controlled to input rice flour when the amount of biodegradable plastic input is below a standard value.

[0052] Accordingly, the biodegradable plastic fertilizer manufacturing device (100) can produce fertilizer using biodegradable plastics other than rice-based biodegradable plastics by adding rice flour. Biodegradable plastics other than rice-based biodegradable plastics may include polylactic acid (PLA) synthesized by polymerizing lactic acid fermented starch obtained from plants such as corn, aliphatic polyester polybutylene succinate (PBS) derived from petroleum, and polybutylene adipate terephthalate (PBAT).

[0053] The mixing unit (150) can mix the input raw materials. For example, the mixing unit (150) can mix automatically weighed food waste and biodegradable plastic. Additionally, the mixing unit (150) may include a temperature control device to control the internal temperature between 20 and 58 degrees. Additionally, the mixing unit (150) may include a humidity control device to maintain an internal humidity of 50 to 90%. The mixing unit (150) can form the mixed raw materials into a powder form using a temperature and humidity device. For example, the mixing unit (150) can produce a powder form through fermentation and drying for a minimum of 1 hour to a maximum of 24 hours. Here, the mixing unit (150) can mix useful microorganisms and rice flour that are input to add microorganisms with slow growth rates or more beneficial microorganisms.

[0054] The fertilizer generating unit (160) can cure the mixtures by drying and fermenting them. The fertilizer generating unit (160) may include a temperature control device for controlling the internal temperature to within 20 to 58 degrees. The fertilizer generating unit (160) can produce fertilizer using the mixture cured by drying and fermenting it.

[0055] FIG. 3 is a diagram illustrating a method for producing a fertilizer based on biodegradable plastic according to an embodiment of the present invention.

[0056] In step (S110), the biodegradable plastic fertilizer manufacturing device may receive food waste and biodegradable plastic. Since the introduced food waste is an organic material and contains sufficient nutrients, microorganisms can be expressed. Additionally, the biodegradable plastic input section (112) may receive biodegradable plastic product waste. For example, the biodegradable plastic may be formed from a rice-based biodegradable composite resin composition. That is, the food waste promotes the enzymatic reaction of the rice in the biodegradable plastic, and the rice can activate microorganisms contained in the food waste. Additionally, biodegradable plastic product waste may be introduced. When biodegradable plastic product waste is introduced, environmental pollution can be further prevented.

[0057] In step (S120), the biodegradable plastic fertilizer manufacturing device can process input food waste and biodegradable plastic. For example, the biodegradable plastic fertilizer manufacturing device can remove odors and delay the decay time by drying the input food waste to lower the moisture content. Additionally, the biodegradable plastic fertilizer manufacturing device can perform a desalination process to lower the salt content by drying the food waste.

[0058] In addition, the biodegradable plastic fertilizer manufacturing device can process the input biodegradable plastic. For example, the biodegradable plastic fertilizer manufacturing device can process the biodegradable plastic into an appropriate size by crushing it.

[0059] Here, the biodegradable plastic fertilizer manufacturing device can automatically weigh processed food waste and biodegradable plastic. For example, the biodegradable plastic fertilizer manufacturing device can adjust the amount of food waste and biodegradable plastic according to preset conditions. In addition, the biodegradable plastic fertilizer manufacturing device can adjust the amount of biodegradable plastic based on the specific gravity of the weighed food waste.

[0060] In step (S130), the biodegradable plastic fertilizer manufacturing device can mix the processed food waste and the biodegradable plastic. For example, the biodegradable plastic fertilizer manufacturing device can form the food waste and the biodegradable plastic into a powder form using a temperature and humidity control device. Here, the biodegradable plastic fertilizer manufacturing device can mix the food waste and the biodegradable plastic formed into a powder form.

[0061] In addition, the biodegradable plastic fertilizer manufacturing device may add and mix beneficial microorganisms and rice flour to slow down the microbial growth rate or to add more beneficial microorganisms. Beneficial microorganisms provide the effect of maximizing microbial expression during the fermentation of biodegradable plastic for fertilizer use. Furthermore, rice flour can activate microorganisms. For example, the biodegradable plastic fertilizer manufacturing device can be controlled to add rice flour when the amount of input biodegradable plastic is below a standard limit.

[0062] In step (S140), the biodegradable plastic fertilizer manufacturing device can cure the mixtures by drying and fermenting them. The biodegradable plastic fertilizer manufacturing device can produce fertilizer using the cured mixtures. As an example, the biodegradable plastic fertilizer manufacturing device may include a temperature control device for controlling the internal temperature to within 20 to 58 degrees.

[0063] FIG. 4 is a drawing illustrating a method for treating food waste and biodegradable plastics according to an embodiment of the present invention.

[0064] In step (S121), the biodegradable plastic fertilizer manufacturing device can dry the input food waste. The biodegradable plastic fertilizer manufacturing device can dry the food waste using methods such as heat, centrifugation, and dehydration. By drying the food waste, the biodegradable plastic fertilizer manufacturing device can lower the moisture content, thereby eliminating odors and delaying the time of decay. Additionally, the biodegradable plastic fertilizer manufacturing device can lower the salt content through drying.

[0065] In step (S122), the biodegradable plastic fertilizer manufacturing device can automatically measure the amount of food waste to input an appropriate proportion of microorganisms. The biodegradable plastic fertilizer manufacturing device can adjust the amount of food waste according to preset conditions.

[0066] In step (S123), the biodegradable plastic fertilizer manufacturing device can crush the input biodegradable plastic. The biodegradable plastic fertilizer manufacturing device can process the biodegradable plastic into an appropriate size by crushing it. For example, the biodegradable plastic fertilizer manufacturing device can process the biodegradable plastic into a size of 30 µm to 10 mm according to preset conditions. Additionally, the biodegradable plastic fertilizer manufacturing device can crush the biodegradable plastic by methods such as impact, cutting, compression, and shearing.

[0067] In step (S124), the biodegradable plastic fertilizer manufacturing device can automatically weigh the processed biodegradable plastic. The biodegradable plastic fertilizer manufacturing device can weigh the biodegradable plastic according to preset conditions. Additionally, the biodegradable plastic fertilizer manufacturing device can adjust the amount of biodegradable plastic based on the specific gravity of the food waste weighed in step (S122). Furthermore, the biodegradable plastic fertilizer manufacturing device can also perform step (S122), which involves weighing the biodegradable plastic according to preset conditions and weighing the food waste based on the specific gravity of the weighed biodegradable plastic.

[0068] In step (S130), the biodegradable plastic fertilizer manufacturing device can mix the processed food waste and the biodegradable plastic.

[0069] FIG. 5 is a diagram illustrating a method of mixing food waste and biodegradable plastic according to an embodiment of the present invention.

[0070] In step (S131), the biodegradable plastic fertilizer manufacturing device may receive and mix processed food waste and biodegradable plastic. The biodegradable plastic fertilizer manufacturing device may include a temperature control device to control the internal temperature between 20 and 58 degrees. Additionally, the biodegradable plastic fertilizer manufacturing device may include a humidity control device capable of maintaining an internal humidity of 50 to 90%. The biodegradable plastic fertilizer manufacturing device may form the mixed raw materials into a powder form using the temperature and humidity device. For example, the biodegradable plastic fertilizer manufacturing device may produce a powder form through fermentation and drying for a minimum of 1 hour to a maximum of 24 hours.

[0071] In step (S132), the biodegradable plastic fertilizer manufacturing device may introduce beneficial microorganisms to slow down the rate of microbial growth or to add more beneficial microorganisms. The biodegradable plastic fertilizer manufacturing device may introduce beneficial microorganisms by spraying them. The biodegradable plastic fertilizer manufacturing device may adjust the amount of beneficial microorganisms introduced based on the measured amount of biodegradable plastic. For example, the beneficial microorganisms may be liquid-based and may include commercial liquid raw materials that can be utilized in eco-friendly fermented liquid raw materials and other fertilizers. The biodegradable plastic fertilizer manufacturing device may spray them by adjusting according to user requirements. This allows the rate of microbial growth to be increased when the biodegradable plastic is fermented for fertilizer use.

[0072] In step (S133), the biodegradable plastic fertilizer manufacturing device may input rice flour. For example, the biodegradable plastic fertilizer manufacturing device may be controlled to input rice flour when the amount of input biodegradable plastic is below a standard value. Therefore, by inputting rice flour, the biodegradable plastic fertilizer manufacturing device can produce fertilizer using biodegradable plastics other than rice-based biodegradable plastics. Biodegradable plastics other than rice-based biodegradable plastics may include polylactic acid (PLA), synthesized by polymerizing lactic acid fermented starch obtained from plants such as corn, aliphatic polyester polybutylene succinate (PBS), and polybutylene adipate terephthalate (PBAT) derived from petroleum.

[0073] In step (S134), the biodegradable plastic fertilizer manufacturing device can mix the input raw materials.

[0074] Thus, the biodegradable plastic fertilizer manufacturing device can increase the degree of biodegradability and effectively supply fertilizer by processing biodegradable plastic or carrying out an additional fertilizer conversion process.

[0075] The foregoing description of the present invention is for illustrative purposes only, and those skilled in the art will understand that other specific forms can be easily modified without altering the technical spirit or essential features of the present invention. Therefore, the embodiments described above should be understood as illustrative in all respects and not restrictive. For example, each component described as a single unit may be implemented in a distributed manner, and components described as distributed may likewise be implemented in a combined form.

[0076] The scope of the present invention is defined by the claims set forth below, and all modifications or variations derived from the meaning and scope of the claims and equivalent concepts thereof should be interpreted as being included within the scope of the present invention. Explanation of the symbols

[0077] 100: Biodegradable plastic fertilizer manufacturing device 110: Raw material input section 120 : Raw Material Processing Unit 130 : EM Injection Unit 140: Rice flour input section 150 : Mixing section 160 : Fertilizer generating section

Claims

Claim 1 A raw material input section into which food waste and a biodegradable plastic, which is a rice-based biodegradable composite resin composition, are respectively input; a raw material processing section that dries and weighs the input food waste, crushes and processes the input biodegradable plastic, and weighs the processed biodegradable plastic; an EM input section into which beneficial microorganisms formed in liquid form are input; a rice flour input section into which rice flour containing surplus rice is input; and a mixing section that generates a mixture comprising the weighed food waste, the weighed biodegradable plastic, the input beneficial microorganisms, and the rice flour. A biodegradable plastic fertilizer manufacturing apparatus comprising: a fertilizer generating unit that cures the mixture produced above by drying and fermenting it, and generates fertilizer using beneficial microorganisms from the cured mixture; wherein the raw material processing unit automatically measures the amount of food waste to input the beneficial microorganisms in an appropriate ratio, the EM input unit sprays the beneficial microorganisms by adjusting the input amount based on the measured amount of biodegradable plastic or according to user requirements, and the rice flour input unit controls the input of the rice flour when the amount of the input biodegradable plastic is below a standard value, and the fertilizer is generated by the food waste promoting the enzymatic conversion of the rice in the biodegradable plastic and the rice activating the beneficial microorganisms contained in the food waste. Claim 2 delete Claim 3 A biodegradable plastic fertilizer manufacturing apparatus according to claim 1, wherein the raw material processing unit comprises: a food waste drying unit that dries the food waste to lower the moisture content and salt content; a first automatic weighing unit that weighs the dried food waste according to preset conditions or weighs it based on the specific gravity of the weighed biodegradable plastic; a biodegradable plastic processing unit that crushes and processes the biodegradable plastic according to preset conditions; and a second automatic weighing unit that weighs the processed biodegradable plastic according to preset conditions or weighs it based on the specific gravity of the weighed food waste. Claim 4 delete Claim 5 delete Claim 6 delete Claim 7 A biodegradable plastic fertilizer manufacturing apparatus according to claim 1, wherein the mixing unit mixes the input food waste, the biodegradable plastic, the useful microorganisms, and the rice flour to produce the mixture, and ferments and dries the mixture using a temperature control device and a humidity control device to produce it in powder form. Claim 8 A biodegradable plastic fertilizer manufacturing apparatus according to claim 7, wherein the mixing unit controls the internal temperature to 20 to 58 degrees using the temperature control device and controls the internal humidity to 50% to 90% using the humidity control device, and ferments and dries for a minimum of 1 hour to a maximum of 24 hours. Claim 9 A biodegradable plastic fertilizer manufacturing apparatus according to claim 7, wherein the fertilizer generating unit controls the internal temperature to within 20 to 58 degrees using the temperature control device. Claim 10 a) a step of introducing food waste and a biodegradable plastic, which is a rice-based biodegradable composite resin composition, respectively into a biodegradable plastic fertilizer manufacturing device; b) a step in which the biodegradable plastic fertilizer manufacturing device dries and weighs the introduced food waste, crushes and processes the introduced biodegradable plastic, and weighs the processed biodegradable plastic; c) a step in which the biodegradable plastic fertilizer manufacturing device introduces beneficial microorganisms formed in a liquid state; d) a step in which the biodegradable plastic fertilizer manufacturing device introduces rice flour containing surplus rice; e) a step in which the biodegradable plastic fertilizer manufacturing device generates a mixture comprising the weighed food waste, the weighed biodegradable plastic, the introduced beneficial microorganisms, and the rice flour. and f) a step of curing the generated mixture by drying and fermenting the biodegradable plastic fertilizer manufacturing device, and producing the cured mixture into fertilizer using beneficial microorganisms; wherein step b) automatically measures the amount of food waste to input the beneficial microorganisms in an appropriate ratio, step c) sprays the beneficial microorganisms by adjusting the input amount based on the measured amount of biodegradable plastic or according to user requirements, and step d) controls the input of rice flour when the input amount of biodegradable plastic is below a standard value, and the fertilizer is produced by the food waste promoting the enzymatic conversion of the rice in the biodegradable plastic and the rice activating the beneficial microorganisms contained in the food waste. Claim 11 delete Claim 12 A method for manufacturing biodegradable plastic fertilizer according to claim 10, wherein step b) comprises: a step of drying the food waste to lower its moisture content and salt content; a step of weighing the dried food waste according to preset conditions or based on the specific gravity of the weighed biodegradable plastic; a step of crushing and processing the biodegradable plastic according to preset conditions; and a step of weighing the processed biodegradable plastic according to preset conditions or based on the specific gravity of the weighed food waste. Claim 13 delete Claim 14 delete Claim 15 delete Claim 16 A method for manufacturing biodegradable plastic fertilizer according to claim 10, wherein step e) involves mixing the input food waste, the biodegradable plastic, the useful microorganisms, and the rice flour to produce the mixture, and then fermenting and drying the mixture using a temperature control device and a humidity control device to produce it in powder form. Claim 17 A method for manufacturing biodegradable plastic fertilizer according to claim 16, wherein step e) involves controlling the internal temperature to 20 to 58 degrees using the temperature control device, controlling the internal humidity to 50% to 90% using the humidity control device, and fermenting and drying for a minimum of 1 hour to a maximum of 24 hours. Claim 18 A method for manufacturing biodegradable plastic fertilizer according to claim 16, wherein step f) involves controlling the internal temperature to within 20 to 58 degrees using the temperature control device.

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