KR100734619B1 - Ferment apparatus of food waste - Google Patents

Abstract

A food waste fermentation apparatus which improves durability of a dewatering housing for dewatering food waste, performs fermentation of food waste in a lump, and removes and exhausts odorous components of gases generated during fermentation of food waste is provided. A fermentation apparatus of food waste comprises a body with a main housing(102) and a fermentation housing(103), a reduction machine(120) for dewatering food waste to discharge the dewatered food waste to the fermentation housing; a fermenter(210) having an agitator(213) and a heater, and an odor removal part, wherein the reduction machine comprises: a pair of first and second transfer screws horizontally installed to transfer the food waste by rotating food waste in a pressed state using a rotary power transmitted from a first drive source; a dewatering housing(150) comprising a plurality of rods connected to one another in supporting brackets such that the rods encircle the transfer screws; a discharge cap(180) having a discharge port connected to an end of the dewatering housing to discharge food waste transferred by the transfer screws in a direction that is inclined downward from an extending direction of the transfer screws; and an opening-and-closing port adjuster(170) connected to the discharge cap to adjust opening and closing amounts of the discharge port, wherein the first transfer screw(130) is longer than the second transfer screw.

Description

[0001] DESCRIPTION [0002] Fermentation of food waste [0003]

1 is a perspective view schematically showing an apparatus for reducing food waste according to the present invention,

Fig. 2 is a side sectional view of the food waste losing device of Fig. 1,

Figure 3 is a partial cut-away section view of the transfer screw portion of Figure 2,

FIG. 4 is a perspective view illustrating a structure of the dehydrating housing of FIG. 2,

Fig. 5 is a sectional view of the rod arrayed in the dehydration housing of Fig. 2 in the axial direction of the feed screw,

FIG. 6 is an enlarged view of an overload safety unit provided in the first rotation of the first conveying screw of FIG. 2,

FIG. 7 is an enlarged view of the opening / closing regulator portion coupled to the discharge cap of FIG. 2,

FIG. 8 is a perspective view of a slider inserted in the discharge cap of FIG. 2,

Fig. 9 is a control system circuit diagram of the first motor of Fig. 2,

Figure 10 is a cross-sectional view of the fermentation housing of Figure 1,

FIG. 11 is a sectional view showing a malodor processing unit installed in the main housing of FIG. 2,

12 is a cross-sectional view of a malodor processing unit according to another embodiment of the present invention.

Description of the Related Art

101: main body 102: main housing

103: fermentation housing 120:

130: first feed screw 140: second feed screw

150: Dewatering housing 152: Support bracket

155: Rod 167: Pulley

180: Discharge cap 210: Fermenter

250:

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for fermentation of food waste, and more particularly, to a device for fermenting food waste that is capable of reducing and fermenting food waste.

As part of the recent collection of garbage, food waste is separated from ordinary garbage.

However, since food waste contains a large amount of water, when it is collected as it is and transported to the waste disposal area, the burden of transportation becomes large, and there is a problem that the transportation vehicle and the surrounding environment are contaminated by the leakage water discharged from the food waste.

In order to solve such a problem, a water removal device capable of removing water from food waste is disclosed in Korean Patent Laid-Open Publication No. 2005-0024553.

However, in the moisture removing device, the perforated plate surrounding the screw is integrally formed in a circular shape. Therefore, in order to withstand the pressing force of the food and the pressing force of the food, the thickness of the plate must be thick, , The manufacturing process is complicated due to the necessity of punching.

In addition, the food waste conveyed by the conveying screw is discharged in a direction parallel to the rotation axis of the conveying screw through the discharge cap, so that there is a disadvantage in that the range of the pressing force variation range for appropriately varying the pressing force is not large depending on the type of food waste .

In addition, there is a disadvantage in that when the foreign matter which may cause an overload is inputted into the feeding screw such as a spoon, in addition to the food garbage, the device may be damaged by the overload.

Meanwhile, the food waste that has been reduced in weight is usually transported to a public treatment facility by a food waste collection vehicle. In order to reduce the transportation burden of the food waste and compost it by self-fermenting, There is a problem in that it is not easy to apply due to the problem of odor generated during fermentation.

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a device for fermenting food waste, which is capable of collectively performing durability and durability of the dewatering housing for dewatering food waste. have.

It is still another object of the present invention to provide a device for fermenting food waste which is capable of removing odorous components of gas generated during fermentation of food waste and discharging it.

According to an aspect of the present invention, there is provided an apparatus for fermenting food waste, comprising: a main body having a main housing and a fermentation housing; A dehydrator for dehydrating food waste introduced through the inlet formed in the main housing and discharging the dehydrated food waste into the fermentation housing; A stirrer for stirring the food waste introduced into the fermentation housing; and a heater for heating the temperature in the fermentation housing to a temperature suitable for the activity of the microorganism; And a malodor processing unit for sucking the malodor gas generated from the fermentation housing and oxidizing and discharging the malodor by the aerobic microorganisms. The reducing unit receives the food waste introduced through the inlet through the first driving source, A pair of first and second feed screws provided horizontally so as to be able to be rotated and conveyed in a state of being rotated; A dewatering housing formed in the support bracket so as to be spaced apart from each other and having a plurality of bars spaced apart from each other with a gap therebetween to enclose the conveying screw; A discharge cap coupled to an end of the dewatering housing and having an outlet capable of discharging the food waste conveyed by the conveying screw to an extending direction of the conveying screw and an inclined downward direction; And an opening / closing regulator coupled to the discharge cap to adjust the opening / closing amount of the discharge port. The first transfer screw is longer than the second transfer screw.

Preferably, the malodor processing unit includes at least one malodor processing tank installed in the main housing; A blower installed in a fermentation gas inlet pipe installed to allow the fermentation gas generated in the fermentation housing to flow into the reaction water of the malodor treatment bath and sucking the fermentation gas; Aeration unit for supplying oxygen into the reaction water of the malodor treatment tank to activate aerobic microorganisms in the reacted water desiccated in the malodor treatment tank; And a gas discharge pipe for discharging the oxidized gas from the malodor treatment tank to the outside of the main housing.

A nozzle tube for spraying water through the nozzle, preferably toward the dewatering housing; And a water collecting tank formed in the nozzle pipe and formed in the outer side of the dewatering housing so as to be closed to discharge the collected liquid through the discharge pipe.

In addition, the first and second engaging gears are provided so that the first rotation shaft of the first conveyance screw and the second rotation shaft of the second conveyance screw are engaged and rotated, and when the load applied to the conveyance screw increases, And an overload safety unit provided between the first drive source and the first rotation shaft so that power transmission from the first drive source to the first rotation shaft can be attenuated.

The overload safety unit includes a brake flange fixedly coupled to the first rotating shaft and having a locking protrusion; A pulley coupled to the first rotating shaft so as to be rotatably inserted into the brake flange and to receive a rotational force from the first driving source through the power transmitting member; A compression pad inserted between the pulley and the engagement flange of the brake flange; A tightening nut screwed to the body of the brake flange so as to be able to move back and forth from the opposite side of the pulley to the pulley on the basis of the pulley; A first spring inserted between the tightening nut and the pulley; And a pressure adjusting bolt penetrating the tightening nut so as to be able to move forward and backward in a direction in which the first spring can be pressed to finely press the first spring.

More preferably, the opening and closing regulator includes a slider installed in the discharge cap so as to be movable along the rotational axis of the first conveying screw; A second spring installed in the discharge cap to elastically bias the slider in the direction of the first conveying screw; And an opening and closing port adjusting handle provided so as to communicate with the first conveying screw so as to communicate with the first conveying screw so as to be able to advance and retreat in the duct formed in the discharge cap and to compress the second spring in the direction of the first conveying screw.

Hereinafter, an apparatus for fermenting food waste according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a partial schematic perspective view showing a device for fermenting food waste according to the present invention, and FIG. 2 is a sectional view of the fermentation apparatus of FIG. 1.

1 and 2, a food waste fermentation apparatus 100 includes a main body 101, a reduction unit 120, a fermenter 210, and a malodor processing unit 250.

The main body 101 comprises a main housing 102 and a fermentation housing 103.

The attenuator 120 can dehydrate the food waste introduced through the inlet 104 formed in the main housing 102 and discharge it to the fermentation housing 102.

The reducer 120 will be described with reference to FIG.

The attenuator 120 includes first and second conveying screws 130 and 140, a dewatering housing 150, an overload safety unit 160, and an opening and closing regulator 170.

The dewatering housing 150 is connected to the upper end of the main housing 102 in such a manner that the inlet port 104 is connected to the inlet port so that the food waste introduced from the end of the hopper- .

The first conveying screw 130 is supported in the main housing 101 and extends in the horizontal direction. The first feed screw 130 is formed such that the helical blade 132 gradually narrows at the end portion.

The second conveyance screw 140 extends in the horizontal direction with respect to the first conveyance screw 130 and is shorter than the first conveyance screw 130.

The spacing of the spiral blades 132 and 142 of each of the conveying screws 130 and 140 is formed to be narrower as the distance from the inlet 104 to the discharge cap 180 increases.

 The dewatering housing 150 is formed to have a gap for dewatering the first conveying screw 130 and the second conveying screw 140, and will be described with reference to FIGS. 4 and 5. FIG.

The dewatering housing 150 is formed of a support bracket 152 and a plurality of rods 155.

The support bracket 152 is configured to have an elliptical hole 153 having one orbit in the plate-like plate, and a mounting groove (not shown) through which the rod 155 is inserted and joined along the inner circumferential surface of the hole 153 154 as shown in Fig.

The rods 155 may be joined to the mounting grooves 154 of the support bracket 152 by welding or other bonding means.

At this time, the interval between the rods 155 may be determined so as to have a gap capable of dewatering.

In the illustrated example, a rectangular bar 155 is applied, but it is needless to say that various types of bars 155 such as a circular shape can be applied.

The dewatering housing 150 is rotated by the feed screws 130 and 140 to increase the ability to withstand the lateral pressure applied in a direction perpendicular to the longitudinal direction of the rod 155 And it is easy to manufacture.

Reference numeral 157 denotes a second support bracket having a circular hole so as to surround the outer side of the first conveyance screw 150 which is further extended from the end of the second conveyance screw 140.

And a nozzle pipe 110 having nozzles for spraying water toward the dewatering housing 150 from the outside of the dewatering housing 150. The nozzle tube 110 is connected to a water supply pipe 112 connected to the outside of the outer water collection tank 116. The water supply pipe 112 may be connected to the water supply valve so as to supply and block water from the outside. When water is sprayed through the nozzle pipe 110 as described above, the leakage water drained from the food waste can be diluted and discharged through the water collection tank 116.

The water collecting tank 116 is formed to form an enclosed space outside the nozzle tube 110 and the dewatering housing 150 to discharge the collected liquid through the discharge tube 117. The discharge pipe 117 is equipped with a valve for opening and closing though not shown.

The end portion of the first conveying screw 130 is disposed so as to be longer than the dewatering housing 150 and is inserted to be inserted into the discharge cap 180 at a certain depth.

The first and second conveyance screws 130 and 140 may be rotated in opposite directions so that the first rotation shaft 131 and the second rotation shaft 131 of the first and second conveyance screws 130, First and second engaging gears 133 and 143 are provided so as to be reciprocally meshed with each other.

The first conveying screw 130 is installed to be able to receive a rotational force from a motor 118 applied as a first driving source through a power transmitting member 119 such as a belt or a chain through a pulley 167.

The amount of load applied to the feed screws 130 and 140 increases so that the first rotation shaft 131 can move from the pulley 167 to the outer circumferential surface of the food waste, An overload safety unit 160 is provided.

The overload safety unit 160 will be described with reference to FIG.

The overload safety unit 160 includes a brake flange 162, a pulley 167, a tightening nut 163, a first spring 164, and a pressure adjusting bolt 165.

The brake flange 162 is fixedly coupled to the first rotation shaft 131 and has an engagement protrusion 162a having an outer diameter expanded in a direction orthogonal to the first rotation shaft 131. [

The brake flange 162 is divided into a cylindrical portion 162b and a retaining protrusion 162a whose outer diameter is larger than the cylindrical portion 162b.

The pulley 167 is movably inserted outside the cylindrical portion 162b of the brake flange 167 and coupled to receive a rotational force from the motor 118 through the power transmitting member 119, Is formed in a stepped shape so as to be drawn in.

A pressing pad 168a is provided on the opposing surface of the engaging jaw 162a and the pulley 167. [ The pressing pad 168a is preferably formed of a known material having high frictional force, and is preferably bonded to the engaging step 162a.

The adjustment nut 163 is screwed so as to be movable in the direction of the engaging protrusion 162a through a screw thread formed outside the cylindrical portion 162b of the brake flange 162. [

The pressure adjusting bolt 165 is provided so as to penetrate through the adjusting nut 163 so as to be able to move back and forth in the direction of the latching protrusion 162a.

The first spring 164 is provided between the adjusting nut 163 and the pulley 167.

It is needless to say that reference numeral 169 denotes a washer inserted before and after the first spring 164, and reference numeral 168b denotes a pressing pad, which may be omitted depending on the shape of the first spring 164.

In this structure, the mutual adhesion force between the pulley 167 and the engagement protrusion 162a through the pressing pad 168a is firstly adjusted using the tightening nut 163, and fine adjustment is performed using the pressure adjusting bolt 165 You can adjust it.

Accordingly, the overload safety unit 160 is configured such that the pulley 167 is held by the first spring 164 within the normal load range determined by the pressing state of the first spring 164, When the load of the first rotating shaft 131 is increased, a slip is generated between the pressing pad 168a and the pulley 167 to cause the motor 118 to rotate, And the transfer screws 130 (140).

Preferably, the overload safety unit 160 increases the load of the first rotary shaft 131 so that the pulley 167 rotates about the first rotary shaft 131, and when the rotational speed of the first rotary shaft 131 is less than the set value And is configured to stop driving the motor 118.

To this end, as shown in FIGS. 6 and 9, a conveying screw rotation detection sensor 223 for detecting the rotation speed of the first rotation shaft 131 and a control unit 225 for controlling the driving of the motor 118 are provided do.

Various sensors such as a proximity sensor, an encoder, a porter interrupter and the like may be applied to the conveying screw rotation detecting sensor 223 according to the rotation detecting method. As an example, a proximity sensor is applied to the conveying screw rotation detection sensor 223, and a projection 221 is provided on the first rotation shaft 131 so that the proximity sensor can sense the proximity sensor.

The control unit 225 counts signals output from the conveying screw rotation detecting sensor 223 at every rotation and determines that the received rotation speed value is less than the set value and determines that the motor 118 is in an overload state. Stop.

The discharge cap 180 is coupled to the main housing 102 and has an internal space longitudinally penetrated through the extension direction of the first conveyance screw 130.

The inner space of the discharge cap 180 is divided into a screw accommodating portion 181 formed to be narrowed just before the distal end portion of the first conveying screw 130 enters the depth, And a spring insertion portion 183 having an inner diameter narrower than that of the screw housing portion 181.

The slider receiving portion 182 is formed with a discharge port 185 opened downward.

The opening / closing controller 170 is coupled to the discharge cap 180 so as to adjust the opening / closing amount of the discharge port 185 of the discharge cap 180, and will be described with reference to FIGS. 7 and 8. FIG.

The opening / closing regulator 170 has a slider 172, a second spring 174, and a steering handle 176.

The slider 172 is inserted into the slider accommodating portion 182 in the discharge cap 180 and is provided so as to be able to move back and forth along the direction of the first rotation shaft 131 of the first conveying screw 130.

8, the slider 172 is inclined to gradually deepen toward the discharge port 185 in the head portion 172a opposite to the first conveyance screw 130, And a conveyance tray groove 172c is formed. The body 172b having a smaller outer diameter than the head 172a of the slider 172 is formed with a slot 172d for a linear movement guide. Reference numeral 173 denotes a restraining pin which penetrates the discharge cap 180 and is inserted into the slot 172d to restrain the slider 172 to be linearly moved.

The second spring 174 is installed between the body 172b of the slider 172 and the forward and backward portions 176a of the adjustment handle 176 so as to bias the slider 172 in the direction of the first conveyance screw 130 .

The adjustment handle 176 has a forward and backward portion 176a that is threadedly engaged with the threaded portion formed in the spring receiving portion 183 of the discharge cap 180 and a handle 176b coupled to the end of the forward and backward portion 176a.

The pressing force in the direction of the first conveyance screw 130 of the slider 172 of the second spring 174 can be adjusted by moving the advancing / retreating portion 176a of the adjusting handle 176 back and forth in the direction of the slider 172 Can be adjusted. The opening width of the discharge port 185 by the slider 172 is varied depending on whether the food waste is discharged or not by the operation of the adjustment handle 176. [ That is, when the food waste is not discharged, the second spring 174 tends to maintain a sufficiently relaxed state so as not to be biased elastically, so that the slider 172 is sufficiently advanced to minimize the opening width of the discharge port 185, The food waste discharged from the head portion 172a of the slider 172 presses the slider 172 in the direction toward the second spring 174 so that the slider 172 is pressed against the pressing force of the food garbage And the elastic force of the second spring 174 are equalized to each other to expand the opening width of the discharge port 185. Therefore, in order to increase the water dewatering rate, the adjustment handle 176 may be operated so as to further advance in the direction of the slider 172.

The dehydrated food waste discharged from the outlet 185 of the reducing unit 120 is dropped into the fermentation tank 211 in the fermentation housing 103.

The fermenter 210 will be described with reference to FIG.

The fermenter 210 has a fermenter 211, a stirrer 213 and a heater 215 installed in a fermentation housing 102 forming a closed space.

The fermentation tank 211 is formed in a semi-cylindrical shape with an open top.

In the fermentation tank 211, microorganisms for fermentation are inoculated.

The stirrer 213 has a structure having a stirring blade 213b provided on the shaft 213a horizontally disposed in the direction crossing the fermenter 211 so as to be spaced apart from each other in the direction crossing 90 degrees.

Reference numeral 214 denotes a motor serving as a second drive for driving a pulley 213c provided at the end of the shaft 213a.

The heater includes a heating medium circulation pipe 216 provided so as to circulate the heating medium in the fermentation tank 211 and a heater 215 for heating the heating medium circulation pipe.

The control unit 225 further includes a temperature detector for detecting the temperature in the fermentation tank 211 so that the temperature in the fermentation tank 211 is maintained at 40 to 80 suitable for microbial activity, Thereby controlling the heater 215. [

Reference numeral 217 denotes an opening / closing door for taking out the food waste, which has been fermented in the fermentation tank 211, from the fermentation tank 211 for use as compost.

Reference numeral 218 denotes a gas inlet for introducing the fermentation gas generated from the food waste fermented in the fermentation tank 211 into the malodor processing unit 250.

The malodor processing unit 250 will be described with reference to FIG.

The malodor processing unit 250 is installed in the main housing 102 so that the malodor gas generated from the fermentation housing 103 can be sucked and oxidized and discharged by aerobic microorganisms.

The malodor processing unit 250 includes first and second malodor processing tanks 251 and 252, a blower 255, a fryer unit 257 and a discharge pipe 262 so as to perform a malodorous process in multiple tiers do.

The first malodor treatment tank 251 is installed to receive the gas to be treated through the fermentation gas inflow pipe 254 extending from the gas inflow port 218.

On the fermentation gas inlet pipe 254, a blower 255 is provided to increase the suction force of the gas.

In the first malodor treatment tank 251, for example, water is filled up at a certain water level, and aerobic microorganisms are injected into the reaction water.

The aerobic microorganisms may be microorganisms such as Bacillus spp. And Pseudomonas spp., Which oxidize and decompose odorous components generated during fermentation, for example, H ₂ S, CH ₄ and NH ₃ .

The second odor treatment tank 252 is adapted to treat the first treated gas through the first odor treatment tank 252. The applied amount of the odor treatment tanks 251 and 252 is limited to the present embodiment Of course not.

The air diffuser comprises a nozzle 257 provided to supply oxygen into the first and second malodor treatment vessels 251 and 252 and an oxygen feeder 259 for supplying air or oxygen through the nozzle 257.

Such an aeration apparatus supplies oxygen for activating aerobic microorganisms in the reacted water desiccated in the odor treatment tanks 251 and 252.

The gas discharge pipe 262 is capable of discharging the gas from which odorous components have been removed through the second malodor treatment tank 252 to the outside of the main housing 102.

Reference numeral 258 denotes a relay pipe for introducing the gas treated in the first malodor treatment tank 251 into the reactive water of the second malodor treatment tank 252.

Unlike the illustrated example, the oxygen supply device 259 may be omitted, and a structure capable of introducing odor gas and oxygen into the odor treatment tanks 251 and 252 using one blower may be applied. to be.

That is, as shown in FIG. 12, the outside air inflow pipe 265 capable of introducing the outside air into the first fermentation gas inflow pipe 254a between the fermentation gas inflow port 218 and the blower 255 is joined, The second gas inlet pipe 254b leading from the first odor treatment tank 255 to the first odor treatment tank 251 is connected to the inlet of the nozzle 257 and the relay pipe 268 is connected to the nozzle of the second odor treatment tank 252 257, and supply oxygen and odor gas to the odor treatment tanks 251, 252 together using one blower 255.

As described above, according to the fermentation apparatus for food waste according to the present invention, the durability of the dewatering housing for reducing food waste is increased and the amount of opening and closing of the outlet can be adjusted. Therefore, the dewatering rate It is possible to adjust the discharge pressure to be adjusted and to provide the advantage that the food waste which has been subjected to the weight reduction process can be continuously performed until the fermentation process.

Claims (6)

A main body having a main housing and a fermentation housing; A dehydrator for dehydrating food waste introduced through the inlet formed in the main housing and discharging the dehydrated food waste into the fermentation housing; A stirrer for stirring the food waste introduced into the fermentation housing; and a heater for heating the temperature in the fermentation housing to a temperature suitable for the activity of the microorganism; And And a malodor processing unit for sucking the malodor gas generated from the fermentation housing and oxidizing and discharging the aerobic microorganisms, The remainder A pair of first and second feed screws installed vertically so as to transfer the food waste introduced through the feed port from the first drive source to the pressurized state for transferring the rotational force; A dewatering housing formed in the support bracket so as to be spaced apart from each other and having a plurality of bars spaced apart from each other with a gap therebetween to enclose the conveying screw; A discharge cap coupled to an end of the dewatering housing and having an outlet capable of discharging the food waste conveyed by the conveying screw to an extending direction of the conveying screw and an inclined downward direction; And an opening / closing regulator coupled to the discharge cap to adjust an opening / closing amount of the discharge port, Wherein the first conveying screw is formed to have a longer length than the second conveying screw. 2. The apparatus according to claim 1, wherein the malodor processing unit At least one odor treatment tank installed in the main housing; A blower installed in a fermentation gas inlet pipe installed to allow the fermentation gas generated in the fermentation housing to flow into the reaction water of the malodor treatment bath and sucking the fermentation gas; Aeration unit for supplying oxygen into the reaction water of the malodor treatment tank to activate aerobic microorganisms in the reacted water desiccated in the malodor treatment tank; And a gas discharge pipe for discharging the oxidized gas in the malodor treatment tank to the outside of the main housing. 3. The dewatering device according to claim 1 or 2, further comprising: a nozzle tube for spraying water through the nozzle toward the dewatering housing; Further comprising a water collecting vessel formed to form an enclosed space outside from the nozzle tube and the dewatering housing to discharge the collected liquid through a discharge pipe. The apparatus of claim 3, wherein first and second engagement gears are provided so that a first rotation shaft of the first conveyance screw and a second rotation shaft of the second conveyance screw are rotated together, And an overload safety unit provided between the first driving source and the first rotating shaft such that power transmission from the first driving source to the first rotating shaft is attenuated when the load applied to the conveying screw increases. Of the total amount of the food wastes. 5. The overload safety unit according to claim 4, A brake flange fixedly coupled to the first rotating shaft and having a locking protrusion; A pulley coupled to the first rotating shaft so as to be rotatably inserted into the brake flange and to receive a rotational force from the first driving source through the power transmitting member; A compression pad inserted between the pulley and the engagement flange of the brake flange; A tightening nut screwed to the body of the brake flange so as to be able to move back and forth from the opposite side of the pulley to the pulley on the basis of the pulley; A first spring inserted between the tightening nut and the pulley; And a pressure adjusting bolt penetrating through the tightening nut so as to be able to move forward and backward in a direction in which the first spring can be pressed, thereby finely pressing the first spring. 6. The apparatus of claim 5, wherein the access- A slider installed in the discharge cap so as to be capable of being advanced and retreated along a rotation axis direction of the first conveyance screw; A second spring installed in the discharge cap to elastically bias the slider in the direction of the first conveying screw; And an opening and closing port adjusting handle provided so as to communicate with the first conveying screw in a direction of the rotation axis of the first conveying screw so as to be able to advance and retreat into the duct formed in the discharge cap and to compress the second spring in the direction of the first conveying screw Characterized in that the food waste is fermented.

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