Food waste treatment apparatus with solid material recycling means and method for recycling solid material using same

Abstract

The present invention relates to a food waste treatment apparatus with solid material recycling means and a method for recycling solid materials using the same apparatus. More specifically, the present invention discloses a food waste treatment apparatus with solid material recycling means and a method for recycling solid materials using the same apparatus, wherein a food waste is rapidly fermented and decomposed into a suspension containing solids by utilizing microorganisms and carrier balls, and then the suspension is subjected to one or more stages (n stages) of filtering through a porous sponge to ultimately allow clean water to be naturally discharged and the suspension containing solids undergoes repeated recirculation and multi-stage filtration within the food fermentation unit, significantly reducing the solid discharge rate in the treated water released to sewage or wastewater pipes. whereby only clean water is discharged, while enabling the solid material to be recycled as fertilizer, with sufficient fermentation and moisture removal.

Description

Food waste treatment device having a solid waste resource recovery means and a solid waste resource recovery method using the device

[0001] The present invention relates to a food waste treatment device having a solid resource recycling means and a solid resource recycling method using the device, and more particularly, to a food waste treatment device having a solid resource recycling means and a solid resource recycling method using the device, which rapidly ferment and decompose food waste into a suspension containing solids using microorganisms and carrier balls, and then performs one or more n-stage filterings of a porous sponge so that clear water is naturally discharged as a final product, and performs repeated recirculation and multi-stage filtering of the suspension containing solids to a food fermentation unit, thereby significantly reducing the solid discharge rate of treated water discharged into a sewage pipe or a sewer pipe, thereby discharging only clear water and using it as fertilizer, and enabling sufficient fermentation and water-removed solid resource recycling.

[0002]

[0003] In general, recently, with the development of various food service industries, the amount of food waste, such as food waste, is increasing exponentially.

[0004] This food waste accounts for a large amount, accounting for one-third of all waste, and not only does it rot very quickly, causing a foul odor, but it also has high disposal costs and high moisture content, making it a serious social problem.

[0005] Currently, landfill and volume-based food waste disposal methods are used. Landfilling is difficult to secure landfill sites for food waste. Furthermore, the high moisture content, along with protein, carbohydrates, fat, and fiber, releases various pollutants. Furthermore, leachate contaminates groundwater and pollutes the air, contributing to serious environmental pollution. Volume-based food waste disposal also poses a significant challenge. The rapid decomposition of food waste within the bags creates a foul odor, making it difficult to secure dedicated personnel for collection and disposal.

[0006] To address these issues, households and restaurants are using drying, grinding, and microbial-based methods to process food waste independently. Drying methods use heating to dry food waste to reduce its moisture content, resulting in high maintenance costs due to frequent power consumption, strong odors, and a high risk of electric shock.

[0007] Grinding methods utilize rotating blades to crush and shred food waste before discharging it through the sewer system. This requires high space requirements and installation costs. Furthermore, approximately 80% of the food waste must be recovered and processed separately. Microbial methods, on the other hand, mix food waste with microorganisms for fermentation, resulting in significantly higher processing efficiency and potential simultaneous resolution of several of the problems associated with conventional methods. Therefore, extensive research is being conducted on this method.

[0008] Meanwhile, since solids are discharged into the sewer system without reprocessing or collection in the past, there is a limit to meeting the requirements of Article 10, Paragraph 4 of the Enforcement Decree of the Waste Management Act (in the case of food waste as stipulated in Article 10, Paragraph 4 of the Enforcement Decree of the Waste Management Act, the weight of solids discharged together with the effluent after the recycling process of the relevant facility is limited to less than 20 / 100 of the weight of solids entering the sewer system), and there is a problem that solids may accumulate in the sewer system over time, paralyzing its function.

[0009] Additionally, there is a concern that solid matter and wastewater with residual odor may be discharged together because the liquid fermentation of food waste is not complete.

[0010] In addition, businesses that produce large amounts of food waste according to the Waste Management Act must entrust the food waste to a waste disposal business or recycle it through a recycling facility. In this case, the amount of solids discharged together with solids during the recycling process is limited to less than 20 / 100 of the amount of solids entering the waste, thus requiring an efficient food waste disposal facility.

[0011]

[0012] Therefore, the purpose of the present invention to solve the above-mentioned conventional problems is to provide a food waste treatment device having a solids resource recovery means that rapidly ferment and decomposes food waste introduced into a food waste fermentation unit into a suspension containing solids using microorganisms and carrier balls, and then ultimately discharges clear water naturally through one or more n-th filtering steps using a porous sponge.

[0013] Another object of the present invention is to construct a fermentation tank using a porous sponge in which microorganisms live, and to store carrier balls at a certain height inside the fermentation tank and stir them together with food waste, thereby eliminating dead zones in stirring caused by the movement of carrier balls and at the same time promoting biodegradation of food waste.

[0014] Another object of the present invention is to prevent environmental pollution caused by food waste treatment by repeatedly recirculating a suspension containing solids fermented in liquid by microorganisms to a food fermentation unit and performing a multi-stage filtration process, thereby significantly reducing the discharge rate of solids in the treated water discharged into a sewer or a sewage pipe, thereby discharging only clear water.

[0015] Another object of the present invention is to reduce energy consumption for hot water heating by filtering solids in a sponge box having pumping, carrier and filtering functions in a solids recovery tank and then circulating the treated water back into a lower hot water tank, and to prevent waste of water supply by reusing the discharged water.

[0016] Another object of the present invention is to discharge solid matter in the form of a dry powder after sufficient fermentation and moisture removal in a sponge box for a second time and use it as fertilizer, and to enable long-term storage because it is in a dry powder state with sufficient fermentation and moisture removal, so that the user can easily use it when needed, and to enable the number of times and amount of recovery to be arbitrarily adjusted according to the user's needs, so that the recovery cycle can be adjusted.

[0017] Another object of the present invention is to provide an effect that the fermentation tank and the filtering means are easy to replace because they are manufactured using a porous sponge, and that a food waste treatment device using microorganisms can be produced at low cost and effectively distributed.

[0018] Another object of the present invention is to minimize the discharge of fine solids by repeatedly filtering fine solids and to save electric energy by heating hot water through repeated hot water circulation reuse, and to discharge the final discharged water as clear purified treated water.

[0019] Another object of the present invention is to provide a method for recycling solids using a food waste treatment device, which rapidly ferments and decomposes food waste into a suspension containing solids using microorganisms and carrier balls, then filters the suspension containing solids at least once and n times using a porous sponge so that clear water is naturally discharged, and then performs repeated recirculation and multi-stage filtration of the suspension containing solids to a food fermentation unit, thereby significantly reducing the solid discharge rate of the treated water and discharging only clear water while using it as fertilizer, thereby enabling the recycling of solids with sufficient fermentation and moisture removed.

[0020]

[0021] The present invention, in order to achieve the above-described object, discloses a food waste treatment device having a solid resource recovery means, comprising: a housing in which an inlet is formed; an inner tube through which the inlet is opened; a food waste fermentation unit built into the upper portion of the inner tube to stir and biodegrade food waste falling through the inlet by microorganisms and to ferment it into a suspension in a liquid state; a pumping means for redistributing a suspension containing solids falling to the bottom surface of the inner tube to the food waste fermentation unit and circulating it; a filtering means for purifying the solids and suspension falling from the food waste fermentation unit and stored therein into clear water by filtering them one or more times; and a heating means coupled to the bottom surface of the inner tube to promote liquid fermentation and decomposition by microorganisms; and further comprising a solid resource recovery means installed on one upper portion of the inner tube to pump, ferment, and dry turbid water containing solids discharged from the food waste fermentation unit using the functions of a carrier and a filter.

[0022] In addition, the food waste fermentation unit may include a fermentation tank that biodegrades food waste by microorganisms and ferments it into a liquid phase; a support frame that is fixed to the inner tube so as to support the lower part of the fermentation tank; a stirring means that is installed inside the fermentation tank and stirs the food waste; and carrier balls of different sizes that are stored at a certain height inside the fermentation tank and that disperse the food waste throughout the fermentation tank by eliminating blind spots in the stirring of the food waste through flow while pulverizing the food waste, wherein the fermentation tank may be characterized in that it is made of a porous sponge so that the microorganisms can inhabit it and the liquid fermented suspension can fall.

[0023] In addition, the stirring means may be characterized in that it comprises a plurality of stirring shafts arranged at regular intervals inside the fermentation tank; a first stirring blade connected via a plurality of stirring stands coupled in a left-right radial direction to each of the stirring shafts; and a second stirring blade connected via a plurality of stirring stands coupled in a vertical radial direction to each of the stirring shafts, wherein the rotation radius of the first stirring blade is relatively larger than the rotation radius of the second stirring blade to minimize the stirring dead zone, each of the stirring shafts is coupled to be exposed to the outside of the housing, a sprocket is coupled to the exposed stirring shaft, and each of the sprockets is rotated simultaneously by engaging with a chain or belt rotated by a driving means, and the height and interval of each of the stirring shafts are configured to be a height and interval corresponding to the rotation radius so that the first stirring blade does not come into contact with the bottom surface of the fermentation tank.

[0024] In addition, the pumping means may include a submersible pump immersed in a suspension stored in an inner container; an injection pipe connected to the submersible pump and coupled such that the injection nozzle is exposed to the inside of the fermentation tank; and the inner container may have a water level sensor on the bottom surface for controlling whether the submersible pump is operated, and an interference plate is further formed on the ceiling so that the suspension containing solids injected by the injection nozzle is spread throughout the inner container by collision.

[0025] In addition, the filtering means may include a first inclined filter having one side fixed at a higher point than the outlet and the other side fixed in close contact with the bottom surface of the inner container so as to guide solids and suspensions falling from the food fermentation unit to the bottom surface of the inner container and arranged obliquely in the shape of a right-triangular inclined surface; one or more n second inclined filters coupled perpendicularly to the bottom surface of the first inclined filter; and a cap filter having an inclined surface inclined at the same angle as the first inclined filter so as to surround the outlet in a triangular structure and filter; wherein the lower ends of the first inclined filter and the second inclined filter are spaced apart from the bottom surface of the inner container so that the settled solids can be easily recirculated by the pumping means.

[0026] In addition, the fermentation tank or inner tube may be further equipped with a salinity sensor for measuring salinity, and a water spray nozzle for salinity control may be further equipped on the ceiling.

[0027] In addition, the solid resource recovery means may be characterized by comprising: a submersible pump formed to extend to the other upper side of the inner tube and pumping a suspension containing solids; a sponge box body for filtering the suspension containing solids received in the submersible pump by first fermenting and removing moisture, and then discharging the solids; an operating screw installed through the sponge box body and operating to discharge the solids from which moisture has been removed; and a solids recovery tank installed in connection with the sponge box body to receive the solids moved from the operating screw, perform second fermentation, and discharge them in the form of dried powder.

[0028] In addition, the solid resource recovery means may be configured to pump a suspension containing solids, filter the solids in a sponge box having a carrier and filter function, and then circulate and discharge the treated water back into the lower hot water tank.

[0029] In addition, the sponge box body may be configured to include a main case having an internal receiving space with an open upper side and a treated water discharge pipe that discharges treated water to the lower side; a carrier filter installed to be received inside the main case and filtering the suspension containing solids to remove moisture and perform primary fermentation; and a multi-hole tube installed inside the carrier filter to discharge treated water, wherein the operating screw may be characterized in that it is installed to penetrate all of the main case, the carrier filter, and the multi-hole tube.

[0030] In addition, the solids recovery tank may be characterized by comprising a recovery tank having an open upper portion and a bottom surface formed with a certain slope to collect solids; a filtration filter membrane installed on the inside of the recovery tank to perform secondary fermentation and drying of microorganisms remaining in the solids; a sponge carrier installed on the inside of the recovery tank to serve as a carrier and air passage for microorganisms; and a solids discharge pipe penetrating through both the recovery tank and the sponge carrier to discharge fermented and dried solids powder.

[0031] In order to achieve the above-described object, the present invention comprises: a housing having an inlet formed therein; an inner tube connected to the inlet; a food waste fermentation unit built into the upper portion of the inner tube for stirring food waste falling through the inlet and biodegrading it by microorganisms to form a liquid-phase fermented suspension; a pumping means for redistributing a suspension containing solids falling to the bottom surface of the inner tube to the food waste fermentation unit and circulating it; a filtering means for purifying the solids and suspension falling from the food waste fermentation unit and stored therein into clear water by filtering them one or more times; a heating means coupled to the bottom surface of the inner tube for promoting liquid-phase fermentation and decomposition by microorganisms; And, a method for recycling solids using a food waste treatment device having a solids recycling means, which further includes a solids recycling means installed on an upper portion of one side of the inner vessel and pumping, fermenting and drying turbid water containing solids discharged from the food fermentation unit using a carrier and filter function, the method comprising the steps of: stirring the introduced food waste while fermenting and decomposing it into a suspension containing solids using microorganisms and carrier balls; filtering the suspension containing solids introduced into the inner vessel in the fermentation and decomposition step through one or more n-th filtering steps of a porous sponge to finally naturally discharge clear water; pumping the suspension containing solids filtered through one or more n-th filtering steps of the porous sponge from the bottom of the inner vessel using a pumping means and repeatedly recirculating it to the food fermentation unit; It can be characterized by comprising: a step of pumping a suspension containing solids filtered through one or more n-th filterings of the porous sponge from the bottom of the inner vessel with another pumping means and circulating and bypassing the suspension to the solid resource recovery means; a step of storing and collecting the solids fermented and dried by the pumping, carrier, and filter functions by the solid resource recovery means;

[0032]

[0033] According to the food waste treatment device using microorganisms of the present invention, food waste is effectively biodegraded through a carrier cultured with microorganisms and a porous sponge, and then liquid fermented and discharged as clean water through repeated recycling and multi-stage filtration processes, thereby greatly reducing the financial loss of government agencies by simplifying the purification process at sewage treatment plants and enabling the disposal of food waste without moving it from the place of generation.

[0034] In addition, by pumping the turbid water containing solids discharged from the fermentation tank into the solids recovery tank, filtering the solids in a sponge box with a carrier and filter function, and then circulating the treated water back into the lower hot water tank, not only can energy for heating hot water be saved, but also waste of water supply can be prevented by reusing the discharged water.

[0035] In addition, after the solids are sufficiently fermented and dehydrated for the second time in a sponge box, they are discharged in the form of dried powder and used as fertilizer. Since they are in a state of dried powder with sufficient fermentation and dehydrated, they can be stored for a long period of time, making it easy for users to use them when needed. The number of times and amount of recovery can be adjusted arbitrarily according to the needs of the user, making it possible to adjust the recovery cycle.

[0036] In addition, by constructing a fermentation tank using a porous sponge where microorganisms live and storing carrier balls at a certain height inside the fermentation tank and stirring them together with food waste, there is an effect of eliminating dead zones in stirring caused by the movement of carrier balls while simultaneously promoting biodegradation of food waste.

[0037] In addition, since the fermentation tank and filtering means are manufactured using porous sponges, they are easy to replace, and there is also the effect of being able to effectively distribute a food waste treatment device using microorganisms by producing it at low cost.

[0038] In addition, by repetitively recycling hot water, electric energy is saved for hot water heating, and by repeatedly filtering fine solids, the discharged fine solids are minimized, and the final discharged water is purified and treated water.

[0039] In addition, by filtering the solids in the sponge box with pumping, carrier and filtering functions in the solids recovery tank and circulating the treated water back into the lower hot water tank, not only can energy for hot water heating be saved, but waste of water supply can be prevented by reusing the discharged water.

[0040] In addition, the present invention prevents environmental pollution resulting from the treatment of food waste by repeatedly recirculating a suspension containing solids fermented in a liquid form by microorganisms to a food fermentation unit and performing a multi-stage filtration process, thereby significantly reducing the discharge rate of solids in the treated water discharged into a sewer or drain pipe, thereby discharging only clear water.

[0041] In addition, the present invention is to reduce energy consumption for hot water heating by filtering solids in a sponge box having pumping, carrier, and filtering functions in a solids recovery tank and then circulating the treated water back into a lower hot water tank, and to prevent waste of water supply by reusing the discharged water.

[0042]

[0043] Figures 1 to 9 are examples showing a food waste treatment device having a solid waste resource recovery means.

[0044] Figure 1 is a cross-sectional configuration example showing a food waste treatment device having a solid resource recycling means according to the present invention.

[0045] Figure 2 is a perspective view showing a fermentation tank coupled to the inner tube in Figure 1.

[0046] Fig. 3 is a perspective view showing the stirring means extracted from Fig. 1;

[0047] Fig. 4 is a cross-sectional view showing the stirring means in Fig. 1;

[0048] Figure 5 is an enlarged view showing the suspension sprayed onto the interference plate in Figure 1;

[0049] Fig. 6 is an enlarged view of the filtering means in Fig. 1.

[0050] Fig. 7 is an operational diagram showing the operation of the check valve in Fig. 1.

[0051] Fig. 8 is an example diagram showing the operation of the filtering means in Fig. 1.

[0052] Fig. 9 is an exemplary diagram showing the main components of a solid waste resource recovery means according to a food waste treatment device having a solid waste resource recovery means according to the present invention.

[0053] Figure 10 is a flowchart showing a solid waste resource recycling method using a food waste treatment device having a solid waste resource recycling means according to the present invention.

[0054]

[0055] The present invention is susceptible to various modifications and embodiments. Specific embodiments are illustrated in the drawings and described in detail in the detailed description. However, this is not intended to limit the present invention to specific embodiments, but rather to encompass all modifications, equivalents, and alternatives falling within the spirit and technical scope of the present invention.

[0056] The present invention is not limited to the embodiments disclosed below, but can be implemented in various different forms, and the present embodiments are provided only to ensure that the disclosure of the present invention is complete and to fully inform a person having ordinary skill in the art of the scope of the invention.

[0057] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the attached drawings. First, when assigning reference numerals to components in each drawing, it should be noted that, where possible, identical components are assigned the same reference numerals even if they appear in different drawings. Furthermore, when describing the present invention, if a detailed description of a related, well-known structure or function is judged to obscure the gist of the present invention, such detailed description will be omitted.

[0058] Figures 1 to 9 are examples showing a food waste treatment device having a solid waste resource recycling means according to the present invention.

[0059] The present invention provides a food waste treatment device having a solids resource recovery means that rapidly ferments and decomposes food waste introduced into a food waste fermentation unit into a suspension containing solids using microorganisms and carrier balls, and then performs one or more n-th filtering steps using a porous sponge so that clear water is naturally discharged, and secondarily uses the suspension containing solids as fertilizer, and recycles solids that have been sufficiently fermented and dehydrated.

[0060] Referring to FIGS. 1 to 9, a food waste purification device (100) having a solid resource recycling means according to the present invention comprises: a housing (10) in which an inlet (11) is formed; an inner tube (20) in which the inlet (11) is opened; a food waste fermentation unit (30) built into the upper portion of the inner tube (20) to stir and biodegrade food waste falling through the inlet (11) by microorganisms and ferment it into a liquid suspension; a pumping unit (40) for redistributing and circulating a suspension containing solids falling to the bottom surface of the inner tube (20) into the food waste fermentation unit (30); a filtering unit (50) for purifying the solids and suspension falling from the food waste fermentation unit (30) and stored into clear water by filtering them n times or more; And, to promote liquid fermentation and decomposition by microorganisms, it comprises a heating means (60) coupled to the bottom surface of the inner container (20); and further comprises a solid resource recovery means (70) installed on one upper side of the inner container (20) to pump, ferment and dry turbid water containing solids discharged from the food fermentation unit (30) with the function of a carrier and filter.

[0061] The above housing (10) can be formed to have the function of maintaining the heat of the inner tube (20), preventing the leakage of bad odors, and also shielding mechanical noise.

[0062] In addition, this housing (10) is made of SUS as an example, but an insulating material (not shown) for soundproofing and heat preservation, such as glass wool, may be interposed between the two metal plates.

[0063] In addition, the housing (10) is formed with an inlet (11) for inserting food waste, and the inlet (11) can be configured to be connected to the inner tube (20).

[0064] In addition, the inner tube (20) may be made of the same material as the housing (10), but it is preferable that it be made of a size that can secure space between the housing (10) and the drain pipe (122) and the injection pipe (42) to be installed.

[0065] The above food fermentation unit (30) can be configured to have a function of mixing food waste falling through the inlet (11) by stirring it and biodegrading it by microorganisms into a suspension and fermenting it in a liquid state.

[0066] This food fermentation unit (30) is composed of a fermentation tank (32), a support frame (31), a stirring means (33), and a carrier ball (34).

[0067] The above fermentation tank (32) is supported by the above support frame (31), provides a habitat for microorganisms, and also has the function of filtering the liquid fermented suspension.

[0068] The upper part of this fermentation tank (32) is configured to be open so that food waste falling through the inlet (11) can be stored. Here, the fermentation tank (32) is made of porous sponge, so that it can have the additional function of blocking noise as well as heat retention.

[0069] Preferably, the four inner sides are made of a sponge box, and the sponge is porous and microorganism-resistant.

[0070] In addition, the above fermentation tank (32) may be made of a synthetic resin foam such as PU or PP, in addition to a porous sponge.

[0071] In addition, the support frame (31) is intended to support the fermentation tank (32), and the fixed structure of the inner tube (20) is preferable.

[0072] Meanwhile, as shown in Fig. 2, the fermentation tank (32) is made of a porous sponge, and a frame (321) for supporting the same is further connected to the four sides and the bottom surface of the fermentation tank (32). At this time, a grid frame (322) is connected to the frame (321) located on the bottom surface of the fermentation tank (32) so as to prevent the fermentation tank (32) from sagging due to food waste.

[0073] In addition, the left side frame (321) to which the injection pipe (42) of the pumping means (40) described later is connected can also be configured to further secure support force by combining a grid frame (322) therein.

[0074] The above-mentioned carrier balls (34) are stored at a certain height inside the fermentation tank (32), and can be configured in different sizes so that the food waste can be dispersed throughout the fermentation tank (32) by eliminating the dead zone of the food waste agitation through flow while pulverizing the food waste.

[0075] These carrier balls (34) have different sizes ranging from 5 to 10 mm and can be provided as a porous material with an irregular surface.

[0076] Meanwhile, the fermentation tank (32) and the carrier ball (34) made of a porous sponge are a type of medium (medis) that provide an attachment surface to promote the proliferation and growth of microorganisms, and organic matter or nutrients are bioadsorbed in the biofilm of microorganisms attached to the carrier or are oxidized and decomposed or consumed by the microorganisms.

[0077] Therefore, the material of the carrier ball (34) can be PP, ceramic, wood, activated carbon, charcoal, etc., which are specialized for liquid fermentation and decomposition of food waste. Since the carrier ball (34) is a porous material that provides a space where microorganisms can inhabit, it can increase the microbial fermentation effect of food waste when stored inside the fermentation tank (32).

[0078] In addition, by positioning food waste in the gap formed between the carrier balls (34) and the carrier balls (34), the food waste can be uniformly distributed throughout the entire fermentation tank (32), and in addition, it can have the additional function of eliminating the blind spot of stirring by being moved by the stirring means (33).

[0079] In addition, the stirring means (33) is installed inside the fermentation tank (32) and functions to stir food waste while moving the carrier ball (34).

[0080] This stirring means (33) is composed of a plurality of stirring shafts (331) arranged at regular intervals inside the fermentation tank, as shown in Fig. 3, a first stirring blade (332) connected via a plurality of stirring stands (334) coupled in the left and right radial directions of each stirring shaft (331), and a second stirring blade (333) connected via a plurality of stirring stands (334) coupled in the up and down radial directions of each stirring shaft (331). At this time, the rotation radius of the first stirring blade (332) is made relatively larger than the rotation radius of the second stirring blade (333), thereby minimizing the stirring blind spot, thereby having the effect of uniformly stirring food waste throughout the entire fermentation tank (32).

[0081] In addition, it is preferable that the height and spacing of each stirring shaft (331) above be configured to correspond to the rotation radius so that the first stirring blade (332) with a large rotation radius does not come into contact with the bottom surface of the fermentation tank (32).

[0082] Meanwhile, referring to FIG. 4, each stirring shaft (331) is coupled to be exposed to the outside of the housing (10), a sprocket (331a) is coupled to the exposed stirring shaft (331), and each sprocket (331a) can be configured to rotate simultaneously by engaging with a chain (336) or belt that rotates by a driving means (335), thereby saving energy.

[0083] Here, the driving means (335) may be an electric motor, and by sufficiently performing the stirring function through the forward / reverse rotation of the electric motor and the rest time, it may function to facilitate liquid fermentation and decomposition by microorganisms.

[0084] The above pumping means (40) has the function of circulating the suspension containing solids that falls to the bottom surface of the inner tube (20) by redistributing it to the food fermentation unit (30).

[0085] The above-mentioned pumping means (40) is configured to include a submersible pump (41) that is immersed in a suspension stored in an inner tube (20), and a spray pipe (42) that is connected to the submersible pump (41) and has a spray nozzle (421) that is exposed to the inside of the fermentation tank (32). At this time, the inner tube (20) may be configured to include a water level sensor (21) that controls whether the submersible pump (41) is operating.

[0086] Here, the above injection nozzles (421) may be arranged radially in multiple numbers at the end of the injection pipe (42), as shown in Fig. 5, so that even if one injection nozzle (421) is blocked, another injection nozzle (421) can spray solids and suspension. At this time, the inner tube (20) may further include an interference plate (24) that causes the suspension containing solids sprayed by the injection nozzle (421) to collide with the ceiling and scatter.

[0087] Here, the interference plate (24) is made of SUS304 material, and through this, solid matter that hits the interference plate (24) is broken down into small pieces, and the suspension is dispersed to the surroundings and sprayed widely.

[0088] Therefore, the solids and suspension pumped through the above pumping means (40) can be supplied evenly throughout the fermentation tank (32).

[0089] In addition, the solid matter and suspension injected through the injection nozzle (421) are for the purpose of cleaning and re-fermenting unfermented solid matter.

[0090] Here, the mixed solution drained from the fermentation tank is recycled repeatedly to reprocess unfermented fine solids, which can increase the efficiency of solids fermentation, save water supply by reusing warm water for washing, and reduce energy required for hot water heating.

[0091] In addition, the reintroduced solids and suspension are in a warm state with heat applied through a heating means (60), so the fermentation efficiency can be further maximized.

[0092] Meanwhile, a water spray nozzle (13) for salinity control may be installed on the ceiling of the inner tube (20).

[0093] The above-mentioned water spray nozzle (13) may be configured to supply tap water through the water spray nozzle (13) to control the salinity when the salinity of the suspension increases because the biodegradation and fermentation effect of food waste by microorganisms is reduced. For this purpose, a salinity sensor (23) for measuring the salinity of the suspension may be further provided on the bottom surface of the fermentation tank (32) or the inner cylinder (20).

[0094] The above filtering means (50) has the function of purifying the solids and suspensions that fall from the food fermentation unit (30) and are stored into clear water by filtering them one or more times.

[0095] Referring to FIGS. 6 to 8, the above-mentioned filtering means (50) may be composed of a first slope filter (51), a second slope filter (52), and a cap filter (53), all of which are porous sponge filters. The first slope filter (51), the second slope filter (52), and the cap filter (53) are configured as overlapping sponge filters in layers, thereby enhancing the carrier function for containing microorganisms, thereby efficiently increasing the solid liquefaction function.

[0096] In addition, the first slope filter (51) is preferably structured so that one side is fixed at a higher point than the discharge port (12) and the other side is fixed in close contact with the bottom surface of the inner tube so as to guide the solid matter and suspension falling from the food fermentation unit (30) to the bottom surface of the inner tube (20) and is arranged slanted in the shape of a right triangle.

[0097] Here, the function and effect of the first slope filter (51) is to filter out solids from the turbid liquid that has passed through the perforated plate, send clear treated water downward, and send solids downward in the direction of the pumping means.

[0098] In addition, the second slope filter (52) has a structure in which 1 or more n are combined orthogonally to the bottom surface of the first slope filter (51).

[0099] Here, the second slope filter (52) is also arranged to be inclined according to the slope of the first slope filter (51), so that some of the suspended liquid and solid matter that are filtered and dropped from the first slope filter (51) come into contact with each other, thereby increasing the filtration efficiency.

[0100] In addition, the second slope filter (52) can filter solids and suspensions depending on the slope and the water level, and can filter solids and suspensions in the left and right directions by arranging 1 or more n filters, so that the rate of discharge of solids discharged into a sewage pipe or a sewer pipe can be significantly reduced, and a structure can be provided in which only clear water can be discharged.

[0101] Here, the function and effect of the first slope filter (51) is that it functions as a microbial carrier with a porous sponge filter, so it can increase the effect of blocking solids and the effect of decomposing fine solids by the microorganisms that reside therein.

[0102] Meanwhile, the lower ends of the first slope filter (51) and the second slope filter (52) are spaced apart from the bottom surface of the inner tube (20) so that large solid particles settled on the bottom surface of the inner tube (20) can be effectively moved by a submersible pump.

[0103] Accordingly, a structure can be established in which the solids settled on the bottom surface of the inner tube can be recycled to the fermentation tank (32) by the pumping means (40) and re-fermented.

[0104] In addition, the cap filter (53) is structured to have a slope inclined at the same angle as the first slope filter (51) so that it wraps around the discharge port (12) in a triangular structure and filters.

[0105] This cap filter (53) is made of a porous sponge combined with a frame (not shown), and this cap filter (53) is configured so that the upper surface has the same oblique side as the first slope filter (51), so that solids or suspensions falling from the fermentation tank (32) are not directly introduced into the discharge port (12).

[0106] In addition, since the cap filter (53) has a relatively narrow area and the lower surface is arranged in an inverted triangle shape with the upper surface, a small amount of the suspension that passes through the upper surface of the cap filter (53) flows in, and the flowed suspension is not directly discharged to the discharge port (12) but is filtered and falls.

[0107] Therefore, since the suspension is discharged to the discharge port (12) only when the water level of the inner tube (20) is high enough to submerge the cap filter (53), this ultimately allows only clear purified water to be discharged after the suspension and solids have gone through a multi-stage filtration process.

[0108] Meanwhile, the heating means (60) is structured to be coupled to the bottom of the inner tube (20) to promote liquid fermentation by microorganisms.

[0109] At this time, the inner tube (20) may be further configured with a temperature sensor (23) for measuring water temperature.

[0110] Here, the above heating means (60) can be installed in multiple units depending on the size of the inner tube (20), and a surface heating element with relatively low heat transfer efficiency and power consumption compared to the coil type can be used.

[0111] Meanwhile, in the above inner tube (20), a discharge port (12) is formed with a check valve (121) so that purified water that has been filtered at least once through a cap filter (53) at a certain level is naturally discharged.

[0112] The check valve (121) formed in the above-mentioned discharge port (12) is made of a light material resistant to corrosion, and as shown in Fig. 7, it opens when pushed by water pressure to drain water, and automatically closes when drainage is complete, thereby preventing loss of heat and providing the effect of blocking odors flowing back into the fermentation tank (32) through the drain pipe (122) connected to the sewage pipe.

[0113] The above-mentioned solid resource recovery means (70) is a device structure installed on one upper side of the inner vessel (20) and having the function of pumping, fermenting and drying the turbid water containing solids discharged from the food fermentation unit (30) as a carrier and filter, and is configured to include: a pump (710) that extends to the other upper side of the inner vessel (20) and pumps a suspension containing solids; a sponge box (720) that filters the suspension containing solids received in the pump (710) by first fermenting and removing moisture, and then discharges the solids; an operating screw (730) that penetrates the sponge box (720) and operates to discharge the solids from which moisture has been removed; and a solids recovery tank (740) that is connected to the sponge box (720) and receives the solids moved from the operating screw (730), performs second fermentation, and discharges them in the form of dried powder.

[0114] Here, the solid resource recovery means (70) can be configured to pump a suspension containing solids, filter the solids in a sponge box having a carrier and filter function, and then circulate and discharge the treated water back into the lower hot water tank.

[0115] In addition, the pump (710) is configured with a spray pipe (711) that penetrates the inner tube to the upper side and is connected to the upper side of the sponge box (720) to spray a suspension containing solids.

[0116] In addition, the sponge box (720) may be configured to include a main case (721) having an internal receiving space (721a) with an open upper side and formed with a treated water discharge pipe (721b) for discharging treated water to the lower side; a carrier filter (723) installed to be received inside the main case (721) to filter the suspension containing solids to remove moisture and perform primary fermentation; and a multi-hole tube (725) installed inside the carrier filter (723) to discharge treated water.

[0117] In addition, the carrier filter (723) and the multi-hole (725) may be formed so that the bottom surface thereof is provided in a cone shape and slopes toward the lower center to induce a drainage flow of a suspension containing solids.

[0118] In addition, the multi-hole (725) is a stainless steel body, and a number of pores (725a) are formed on the circumference and bottom of the body to induce drainage and air flow.

[0119] In addition, the operating screw (730) may be installed in a screw form driven by a motor (M) to move the solid matter from which moisture has been removed in a screw manner. At this time, the operating screw (730) may be installed to penetrate the main case (721), the carrier filter (723), and the multi-hole (725) so as to be configured to quickly discharge the solid matter from which moisture has been removed into the solid matter recovery tank (740) in a screw structure.

[0120] In addition, the solid recovery tank (740) receives solids moved from the operating screw (730) and discharges them in the form of secondary fermentation and dried powder, and is configured to include a recovery tank (741) that is formed with an open upper side and a bottom slope (741a) having a certain slope to collect solids; a filtration filter membrane (743) that is installed on the inside of the recovery tank (741) to perform secondary fermentation and drying of microorganisms remaining in the solids; a sponge carrier (745) that is installed on the inside of the recovery tank (741) to serve as a carrier and air passage for microorganisms; and a solid discharge pipe (747) that is penetrated and connected to both the recovery tank (741) and the sponge carrier (745) to discharge the fermented and dried solid powder.

[0121] Here, the dried powdered solids are collected downward by the bottom slope (741a) of the above-mentioned recovery container (741) to sufficiently induce fermentation discharge, and when stored, air flow is induced through the sponge carrier to the microorganisms remaining in the filtration filter membrane to quickly induce fermentation and drying functions.

[0122] In this way, by pumping the turbid water containing solids discharged from the food fermentation unit into the solids recovery tank, filtering the solids in a sponge box with a carrier and filter function, and then circulating the treated water back into the lower hot water tank, not only can energy for heating hot water be saved, but also waste of water supply can be prevented by reusing the discharged water.

[0123] In addition, after the solids are sufficiently fermented and dehydrated for the second time in a sponge box, they are discharged in the form of dried powder and used as fertilizer. Since they are in a state of dried powder with sufficient fermentation and dehydrated, they can be stored for a long period of time, making them easy for users to use when needed. In addition, the number of times and amount of recovery can be adjusted arbitrarily according to the user's needs, so the recovery cycle can also be adjusted.

[0124] Meanwhile, a blower (80) is installed inside the housing (10) of the present invention to induce air flow, and the housing (10) has ventilation holes (81) equipped with sponge filters at different locations, so that when air flows in through one of the ventilation holes depending on the air pressure inside the treatment device and the air environment outside the ventilation hole, the ventilation hole on the other side becomes an air exhaust path, thereby facilitating the flow of air in the entire space between the inner tube of the treatment device and the housing, and enabling the supply of external oxygen when air flows in.

[0125] This supplies oxygen to aerobic microorganisms living in the sponge box inside the solid waste resource recovery device, thereby improving their reproductive and fermentative abilities. The ventilation holes on the other side can also serve to remove moisture inside the treatment device by discharging the water vapor generated during the fermentation and drying of the solid waste to the outside.

[0126] Meanwhile, the present invention can propose a solid waste resource recycling method using the food waste treatment device.

[0127] <Microbial fermentation decomposition stage>

[0128] A step can be configured to ferment and decompose the introduced food waste into a suspension containing solids by stirring it using microorganisms and carrier balls (S100).

[0129] Here, the process is to disperse food waste throughout the fermentation tank by means of a stirring means installed in a fermentation tank made of porous sponge, and to use carrier balls to allow microbial habitats and liquid fermented suspension to fall.

[0130] <Filtering water discharge stage>

[0131] In the above fermentation and decomposition step, a step can be performed to naturally discharge clear water by filtering the suspension containing solids flowing into the inner vessel through one or more n-th filtering steps using a porous sponge (S200).

[0132] Here, the solids and suspension falling from the food fermentation unit are guided to the bottom surface of the inner vessel by a first inclined filter having one side higher than the outlet and the other side inclined in an inclined plane shape, and at least n second inclined filters are connected perpendicular to the bottom surface of the first inclined filter, and a cap filter having an inclined plane inclined at the same angle as the first inclined filter so as to surround the outlet in a triangular structure for filtering, thereby causing the solids and suspension to fall while growing microorganisms inside the filter, and the settled solids falling to the bottom of the inner vessel are connected to a recirculation process by a pumping means, thereby performing a multi-stage filtration process, so that the treated water discharged into a sewage pipe or a sewer pipe significantly reduces the discharge rate of solids, and only clear purified water is discharged.

[0133] <Recirculation stages of fermentation, decomposition, and filtering>

[0134] A step of repeatedly recirculating a suspension containing solids filtered through one or more n-th filterings of the porous sponge may be configured by pumping the suspension from the bottom of the inner vessel using a pumping means to the food fermentation unit (S300).

[0135] Here, the suspension containing solids is sprayed from the ceiling to the spray nozzle through a spray pipe connected to the spray nozzle exposed to the inside of the fermentation tank through a submersible pump installed at the bottom of the inner vessel, and the suspension is recirculated by widely spreading the suspension through the interference plate so that the suspension is spread throughout the inner vessel by collision.

[0136] Bypass stage as a means of solid waste resource recovery

[0137] A step may be configured to pump a suspension containing solids filtered through one or more n-th filtering of the porous sponge from the bottom of the inner tube to another pumping means and circulate bypass to the solids resource recovery means (S400).

[0138] Here, the turbid water containing solids discharged from the fermentation tank is pumped to the solids recovery tank, the treated water is filtered out of the solids in a sponge box with a carrier and filter function, and is circulated back into the lower hot water tank, thereby saving energy for hot water heating and preventing waste of water supply by reusing the discharged water.

[0139] <Solid matter storage and collection stage>

[0140] A step of storing and collecting solids fermented and dried by the above solids resource recovery means with pumping, carrier and filter functions can be configured (S500).

[0141] Here, the solids are sufficiently fermented and dehydrated for the second time in a sponge box, and then discharged in the form of dried powder to be used as fertilizer. Since the solids are in a state of dried powder with sufficient fermentation and dehydrated, they can be stored for a long time, making it easy for the user to use them when needed. The number of times and amount of recovery can be adjusted arbitrarily according to the user's needs, making it possible to adjust the recovery cycle.

[0142] Preferably, by bringing in external dry air from the ventilation hole and mixing it with internal warm air by a heating means through a blower that induces air flow and blowing it onto the sponge filter body, oxygen is supplied to microorganisms and the dry air dries the moisture inside the device, thereby removing odor. In addition, the supply of air flow can contribute to activating the reproduction and growth ability of aerobic microorganisms that require oxygen. This repeated reuse of hot water circulation saves electric energy due to hot water heating, and the repeated filtration treatment of fine solids minimizes the discharged fine solids, and the final discharged effluent discharges clear, purified treated water, while at the same time, the solids can be discharged and used as fertilizer in which activated microorganisms have grown.

[0143] As described above, the food waste treatment device having a solid resource recycling means according to the present invention rapidly ferments and decomposes food waste into a suspension containing solids using microorganisms and carrier balls, and then undergoes one or more n-stage filterings of a porous sponge to ultimately discharge clear purified water naturally, and the suspension containing solids is repeatedly recycled to a food fermentation unit and undergoes a multi-stage filtration process to significantly reduce the solids discharge rate of treated water discharged into a sewage pipe or sewer pipe, thereby discharging only clear purified water. In addition, a solid resource recycling stage is provided to enable the use of solids as fertilizer and the recycling of solids with sufficient fermentation and moisture removed.

[0144] Although the present invention has been illustrated and described with reference to preferred embodiments as described above, it is not limited to the above-described embodiments, and various modifications and variations are possible within the scope equivalent to the technical idea of ​​the present invention and the scope of the patent claims to be described below by a person having ordinary skill in the art without departing from the spirit of the present invention.

Claims

1. A food waste treatment device having a solid resource recovery means, comprising: a housing in which an inlet is formed; an inner tube through which the inlet is opened; a food fermentation unit built into the upper portion of the inner tube to stir food waste falling through the inlet and biodegrade it by microorganisms to ferment it into a liquid suspension; a pumping means for redistributing a suspension containing solids falling to the bottom surface of the inner tube to the food fermentation unit and circulating it; a filtering means for purifying the solids and suspension falling from the food fermentation unit and stored by filtering them one or more times into clear water; and a heating means coupled to the bottom surface of the inner tube to promote liquid fermentation and decomposition by microorganisms; and a solid resource recovery means installed on one upper portion of the inner tube to pump, ferment, and dry turbid water containing solids discharged from the food fermentation unit using the functions of a carrier and a filter; The above solid resource recycling means It comprises a submersible pump formed to extend to the other upper side of the inner tube and pumping a suspension containing solids; a sponge box body for discharging the solids after filtering the suspension containing solids received in the submersible pump by first fermentation and removing moisture; an operating screw installed through the sponge box body and operating to discharge the solids from which moisture has been removed; and a solids recovery tank installed in connection with the sponge box body and receiving the solids moved from the operating screw and discharging them in the form of a dry powder after second fermentation. It is characterized in that the suspension containing solids filtered through one or more n-th filtering of a porous sponge is pumped from the bottom of the inner vessel to another pumping means and circulated bypass to the solids resource recovery means. A food waste treatment device having a solid waste recycling means.

2. In paragraph 1, The above filtering means A first inclined filter, one side of which is fixed at a higher point than the discharge port and the other side of which is fixed in close contact with the bottom surface of the inner container so as to guide solids and suspensions falling from the food fermentation unit to the bottom surface of the inner container, and is arranged in a slanted shape in the shape of a right triangle; At least one n second slope filter connected orthogonally to the bottom surface of the first slope filter; A cap filter having a sloped surface at the same angle as the first slope filter to wrap the discharge port in a triangular structure so as to be filtered; comprising: The lower ends of the first and second slope filters are spaced apart from the bottom surface of the inner tube so that the settled solids can be easily recirculated by a pumping means. The second slope filter is also arranged to be inclined according to the slope of the first slope filter, so that some of the suspension and solids that are filtered and dropped from the first slope filter come into contact, thereby increasing the filtration efficiency. A food waste treatment device having a solid waste recycling means.

3. In paragraph 1, The solid resource recovery means is characterized in that it is configured to pump a suspension containing solids, filter the solids in a sponge box having a carrier and filter function, and circulate and discharge the treated water back into the lower hot water tank. A food waste treatment device having a solid waste recycling means.

4. In paragraph 1, The above sponge box body A main case having an internal storage space with an open upper side and formed with a treatment water discharge pipe for discharging treatment water to the lower side; A carrier filter installed inside the main case to filter the suspension containing solids and remove moisture for primary fermentation; It is configured to include a multi-hole installed inside the carrier filter to discharge treated water, The above operating screw is characterized in that it is installed so as to penetrate the main case, the carrier filter, and the multi-hole. A food waste treatment device having a solid waste recycling means.

5. In paragraph 1, The above solid waste recovery tank A recovery container having an open upper portion and a bottom surface formed with a certain slope to collect solids; A filtration filter membrane installed on the inside of the above recovery body to allow secondary fermentation and drying of microorganisms remaining in the solid matter; A sponge carrier installed to act as a carrier for microorganisms and an air passage by being combined with the inside of the above recovery container; It is characterized in that it comprises a solid discharge pipe that is connected through both the above recovery body and the sponge carrier to discharge the fermented and dried solid powder. A food waste treatment device having a solid waste recycling means.

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