KR100817607B1 - Recycling machine of food waste - Google Patents

Abstract

A food waste recycling system is provided to reduce load of sewage by separating solid and liquid from food waste and draining only separated liquid to sewage, sterilize and eliminate bacteria and odor of food waste using a photocatalyst(TiO2) and ultraviolet rays, and recycle food waste as a raw material for feeder and compost by drying dewatered cake with dehumidified air at a room temperature. A food waste recycling machine includes: a body(20) including a hopper(22); a crushing unit(40) including irregular rollers(42); a solid-liquid separation unit including a dewatering mesh(60) mounted on the body, a screw(52) inserted into an inner part of the dewatering mesh, and a cap(70) mounted on a front end of the dewatering mesh; and a power transmission unit(90) for transmitting power to the irregular rollers and the screw, wherein compression force of the screw removes water contained in crushed food waste by forming the screw in such a shape that pitches of screw vanes(54) are narrowed as it goes from an entrance side to an exit side, thereby increasing pressure as the screw is pushed forward, and wherein the cap is closely adhered to a front end of the dewatering mesh by a spring(74) such that compression strength of the cap is adjusted by controlling pressure of the spring.

Description

Recycling Machine of Food Waste

The present invention is to crush the food waste with solids such as bone, dehydrate to separate the solids of the food waste, to reduce the sewage load by flowing only the separated dehydration liquid to the sewage, water content 25 ~ 30% through the dehydrator The dehydrated cake is dried with dehumidified dry air to 15 ~ 20% moisture content, and bacteria and odors in food waste are sterilized and removed using photocatalyst (TiO ₂ ) and UV rays, collected in a storage box, and stored at room temperature. It is a resource recycling method that can be dried by a dehumidified wind of the feedstock and compost raw materials, all of the above work is done automatically by a sensor, a breakthrough small-size food waste recycling system made in one piece.

Conventional technology includes a disposer attached to a sink, and a Korean Utility Model Registration No. 434434 (designation name: food processor) is disclosed.

However, the above-mentioned conventional disposers have increased the load on the sewage treatment plant by changing food waste into sewage, which is expensive to construct and operate the sewage treatment plant, and changes in the operation method are inevitable. Is not adopted. In some countries that adopt this, Japan's Ministry of Transportation prohibits the installation of disposers alone and connects to septic tanks that do not increase the load on sewerage based on the results of the comprehensive project. The discharged water quality is less than BOD 10mg / L and TN 10mg. Authorization of the disposer wastewater treatment system was made subject to guaranteeing less than / L and less than TP 1 mg / L. Therefore, domestic disposer use technology is also being developed to include a wastewater treatment system. In addition, small processors developed by many companies include dryers and extinction fermenters, and double dryers consume 15 to 20% of moisture in food waste by hot air and heaters, which are discarded as general waste. More advanced, there is a dryer that crushes and dehydrates food waste, and dehydrates 75 ~ 80% moisture cake by drying with hot air and a heater to dry it with 15 ~ 20% moisture content. The moisture content of the cake is 75-80%, which is also a high energy cost method of drying excess moisture. Lastly, there is a problem in the extinction phase using high-speed fermentation, which has a lot of bad smell during fermentation and the continuous administration of moisture control agents and fermentation microorganisms.

In addition, the Republic of Korea Utility Model No. 434434 is not sufficiently dehydrated, the dehydration cake contains a lot of water, it takes a lot of cost to dry it, there is a problem such as high moisture content and easy to rot.

Food waste recycling apparatus for solving the problems of the prior art as described above, the main body including a hopper; Grinding means comprising an uneven roller; Solid-liquid separation means including a dehydration net mounted to the main body, a screw inserted into the dehydration net, and a cap attached to the tip of the dehydration net; It includes; power transmission means for transmitting power to the uneven roller and the screw.

The screw is narrowed as the pitch of the screw blade toward the outlet, the pressure increases as it is pushed forward to remove the moisture contained in the crushed food waste by the compressive force.

The cap is in close contact with the tip of the dehydration net by a spring, it is preferable that the compressive strength of the cap is adjusted by the pressure of the spring.

The spring is preferably pressure-controlled by a handle attached to the tip of the screw.

It is preferable that a flat bearing is interposed between the cap and the spring to reduce friction.

It is preferable to include a storage means for storing the dehydration cake discharged from the outlet generated between the tip of the dehydration network and the cap, and the drying means provided in the outlet or the storage means.

At least one or two or more of the main body, the grinding means, the dehydration net, and the storage means is coated with a photocatalyst, and an ultraviolet lamp is preferably installed so that the photocatalyst can be irradiated.

As described above, according to the present invention,

The present invention is a non-sanitary problem due to odor generation, leachate and rot generated in the process of collecting, transporting, processing and recycling for food waste treatment, the cost problem in the process of going through numerous steps for food waste treatment, in particular the environment All social, economic and sanitary problems, such as the social conflict caused by the Nimbi phenomenon due to the installation of facilities, can be solved at the source of food waste immediately.

Therefore, by looking at the effect of the present invention in detail, by processing at the food waste source immediately can reduce the collection and transportation costs and processing costs paid to the processing company, there is no social hygiene phenomenon due to unsanitary problems and odors during the collection and transportation social Harmonization can be achieved and the quality of recycled products can be fresh, increasing the utilization and added value such as feed and compost. In addition, it is a groundbreaking food waste treatment system and food waste disposal method that can be exported by suggesting alternative food waste disposal in foreign countries with similar food waste characteristics to Korea.

Hereinafter, with reference to the drawings will be described in detail. However, these drawings are for illustrative purposes only and the present invention is not limited thereto.

1 is an overall schematic structural diagram according to an embodiment of the present invention.

Referring to Figure 1, the food waste recycling apparatus according to the present invention is composed of a body 20 equipped with an inlet 30 through which food waste can be put.

A discharge pipe 26 is formed at the lower portion of the body 20 to discharge the liquid separated from the food waste.

The inlet 30 may be detachably attached to the sink 10 and the filter 12 by the connector 14 as necessary.

The food waste introduced through the sink opening 10 or through a separate inlet 30 is introduced into the grinding means 40, and the grinding means 40 includes a pair of uneven rollers 42 and uneven rollers. And a pair of gears 46 fitted to the shaft of 42 and a pulley or sprocket 44 fitted to any one of the uneven rollers 42.

The pair of gears 46 are configured to engage with each other, and the pair of uneven rollers 42 are also configured to rotate to face each other, and the gear 46 to which power is transmitted from the motor 90 is fixed, and the engaging gear ( 46) is a fluid to push the gears to the spring (not shown), giving a variability to be pushed out according to the strength of the crushed product of the uneven rollers 42 to prevent the failure of the grinding means due to solid solids such as bone It is configured to.

A schematic perspective view of the uneven roller 42 is shown in FIG.

The dehydration net mounting hole 24 of the body 20 is equipped with a dehydration net 60. Dehydration net 60 is shown in FIG.

The dewatering net inlet 62 of the dewatering net 60 is fitted corresponding to the hopper 22 inside the body 20.

The cap 70 is attached to the cap fitting port 64 of the dewatering net 60.

On the other hand, the solid-liquid separation means 50 is provided at the lower side of the grinding means 40.

The solid-liquid separation means 50 has a pulley or sprocket 56, in which power of the motor 90 is transmitted to a chain or belt, and a screw 52 and a screw blade 54 for conveying and compressing the crushed food waste. In this case, the screw 52 is narrowed by the interval between the screw blades 54 while the dehydration cake is discharged to the outlet side after dehydration than the inlet side into which the crushed food waste is introduced, the pitch of the crushed food waste is pushed forward The internal pressure is increased so that the water contained in the food waste can be removed by the compressive force. In addition, the speed of screw rotation is reduced by 1 to 5 revolutions per minute in consideration of the time when the leachate of the food waste leaves the tissue. By rotating as it can be maximized dehydration efficiency with less force of the motor 90.

In addition, the water is dehydrated by the extrusion force of the screw equipped with a cylindrical dewatering net 65 having a hole or a gap of 0.1 to 0.5 mm, which is designed so that only the dehydrated water falls out and the solids do not fall around the screw 52. The dehydration net to be discharged to the outside, the discharged water is collected in the lower portion of the body 20 is discharged to the drain outlet pipe (26).

In addition, the tip of the cylindrical dewatering net 60 is blocked by the cap 70 in order to maximize the dehydration of the food waste solids pushed out to the tip of the screw 52.

A shaft of the screw 52 protrudes to the outside through the central hole of the cap 70, a spring 74 is inserted into the shaft of the screw 52, and the handle 76 is screwed to the screw 52. ) Is coupled to the axis.

The strength of the spring 74 can be adjusted by turning the handle 76. Depending on the strength of the spring 74, the moisture content of the food waste dehydration cake pushed into the gap (cap fitting, 64) between the cap 70 and the dehydration net 60 can be adjusted, the cap 70 and the dewatering net The shape of the dehydrated cake pushed out by the gap between the 60 (cap fitting port 64) becomes a thin slice form, and it is comprised so that it may dry well. Reference numeral 28 is a dewatering cake outlet.

Then, the drying means 86 and the food waste dewatering cake which can dry the thin slice-type food waste dewatering cake pushed out to a gap between the cap 70 and the dehydration net 60 (cap fitting port 64). It is equipped with a storage tank (80).

A fine net 84 is installed at an inner lower portion of the storage tank 80 at a predetermined distance from the bottom and the dewatering cake does not fall on the bottom, and the drying means 86 and the bottom of the storage tank 80 are separated from the net 84. Connected.

The drying means 86 is provided with a blower and a dehumidifier, the wind of the blower is air dehumidified by the dehumidifier, the air supply pipe 88 is configured to be connected to the inner lower portion of the storage tank (80).

The friction between the cap 70 and the spring 74 is reduced between the cap 70 and the spring 74 by interposing a flat bearing (thrust ball bearing 72).

In addition, a photocatalyst, such as titanium dioxide, is coated on the hopper 22, the dehydration net 60, the body 20, and the storage box 80, and an ultraviolet lamp 82 is installed to enable the photocatalyst to be irradiated. Can be sterilized by.

The present invention will be described in detail through the following examples. However, these examples are for illustrative purposes only and the present invention is not limited thereto.

EXAMPLE

The change of moisture content according to the treatment method of food waste and the electrical energy according to the treatment method when drying it were compared. First, 3kg of untreated food waste was divided into 3 parts and one was measured as moisture content and dried as a control. One was shredded with a mixer and broken down with 80 mesh to remove moisture to measure the remaining water content. And the other, the food waste was measured by the food waste recycling apparatus of the present invention by measuring the water content of the dehydrated cake after the dehydration of the pressurized water to investigate the change in each water content according to the treatment method and the resulting energy costs.

<Table 1> Changes in water content and energy consumption by treatment methods

Control Natural dehydration The present invention Water content 89% 82% 28% Dry energy 39,700kcal / kg 35,900kcal / kg - Dehumidification Energy - - 6,100kcal / kg

As shown in Table 1, the natural dehydration method was able to reduce the moisture content by 7% compared to the control, and the resulting energy cost was reduced by only 10% compared to the control, but the present invention compared to the control 61 The energy cost was reduced by as much as%, resulting in an energy savings of 85% compared to the control.

In addition, the mechanism of removing the four main gases of food waste odor by photocatalyst (TiO ₂ ) is trimethylamine (TMA) is decomposed into dimethylamine (DMA), and again methylamine (MA) It is broken down into ammonia, which in turn turns into nitrite or nitrate, turning it into a odorless substance. Hydrogen sulfide is also sulfur or elemental sulfur or sulfate to turn into a odorless substance. Methyl mercaptan is also elemental sulfur or sulfate to be odorless. Will change to

Therefore, during the treatment of food waste, photocatalyst (TiO ₂ ) is applied to the food waste contact area and the storage tank, and 380 nm UV lamp is installed to generate free radicals by electrons and holes generated by the light energy of ultraviolet light. The sterilization and odor removal efficiency of the control and the control system were compared with the sterilization and odor removal of bacteria.

Odor was measured with a gastec detector, and E. coli counted the number of liters of food waste leachate per liter.

As a result of comparison, as shown in Table 2, the present invention was not detected in all aspects such as ammonia, trimethylamine, methylmercaptan, hydrogen sulfide, and Escherichia coli, indicating the superiority of the present invention.

<Table 2> Changes in Odor and Bacteria

division Control The present invention Ammonia 100 ppmv 0 Trimethylamine (TMA) 30 ppmv 0 Methyl mercaptan 50 ppmv 0 Hydrogen sulfide 50 ppmv 0 Escherichia coli 4,500 / l 0

1 is an overall schematic structural diagram according to an embodiment according to the present invention;

Figure 2 is a perspective view of the irregularities in one embodiment according to the present invention.

Figure 3 is an exploded perspective view of the dewatering net and cap in one embodiment according to the present invention.

*** Explanation of main parts of drawing ***

10. sink sink 12. filter 20. body

22. Hopper 24. Dewatering Net Mount 26. Outlet

28. Dehydration cake outlet 30. Inlet 40. Grinding means

42. Uneven roller 44. Uneven roller pulley 50. Solid-liquid separation means

52. Screw 54. Screw wing 56. Screw pulley

60. Dewatering Net 62. Dewatering Net Inlet 64. Cap Mounting Hole

70.Cap 72.Bearing 74.Spring

76. Handle 80. Storage box 82. UV lamp

90. Power generating means

Claims (7)

delete delete In the food waste recycling apparatus, A main body including a hopper; Grinding means comprising an uneven roller; Solid-liquid separation means including a dehydration net mounted to the main body, a screw inserted into the dehydration net, and a cap attached to the tip of the dehydration net; It includes a power transmission means for transmitting power to the uneven roller and screw; The screw is narrowed as the pitch of the screw blade toward the outlet, the pressure increases as it is pushed forward to remove the moisture contained in the crushed food waste by the compressive force; The cap is in close contact with the front end of the dehydration net by a spring, food waste recycling apparatus, characterized in that the compression strength of the cap is adjusted by the pressure of the spring. The method of claim 3, The spring is a food waste recycling apparatus, characterized in that the pressure is adjusted by a handle mounted to the tip of the screw. The method of claim 4, wherein Food waste recycling apparatus, characterized in that the friction between the cap and the spring is interposed to reduce the friction. The method of claim 5, Storage means for storing the dewatering cake discharged from the discharge port generated between the tip of the dewatering network and the cap; Food waste recycling apparatus comprising a drying means provided in the outlet or the storage means. The method of claim 6, Any one or two or more of the main body, grinding means, dehydration net, storage means is coated with a photocatalyst, Food waste recycling apparatus characterized in that the ultraviolet lamp is installed to be irradiated to the photocatalyst.

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