KR20010002137A - System and method for treating organic waste matter have in water - Google Patents

Abstract

PURPOSE: A system and a method for treating of organic waste containing moisture are provided, which can reuse organic waste without decompression problemes by vaporizing and drying organic waste containing moisture. CONSTITUTION: The system contains; (i) preliminary treatment tank for storing organic waste containing moisture; (ii) oil tank for storing oil that is used when the moisture of the organic waste is removed; (iii) drier for removing the moisture of the organic waste supplied from the preliminary treatment tank by using the oil from the oil tank that is installed hollow rotary axis operated by motor; (iv) boiler for controlling temperature of the inside of the drier; (v) vacuum pump for controlling pressure of the inside of the drier; (vi) detector for detecting the road operated on the hollow rotary axis; (vii) controller for controlling the operation of the hollow rotary axis to compare detected road at the detector with fixed value; (viii) instrument for discharging operated steam from the inside of the drier to the outside that is connected between the drier and the vacuum pump; and (ix) instrument for separating the oil of the organic waste treated at the drier. The method contains the steps of; (1) supplying the organic waste into heated drier; (2) comparing with the fixed value by detecting the road operated at the hollow rotary axis of the drier; (3) operating the hollow rotary axis as each 15 degree by 1RPM to the normal direction or contrary direction, when the detected road is more 95% at the comparing step; (4) operating the hollow rotary axis by 1-5 RPM to the normal direction or contrary direction, when the detected road is 80-95% at the comparing step; and (5) operating the hollow rotary axis as 13-15 RPM to the normal direction for earlier input time, when the detected road is 75-80% at the comparing step.

Description

SYSTEM AND METHOD FOR TREATING ORGANIC WASTE MATTER HAVE IN WATER}

The present invention relates to a system and method for drying and recycling organic waste containing water, and more specifically, sludge, manure and livestock sludge generated when treating food waste, purified water and sewage and various wastewater. The present invention relates to a system and method for treating water-containing organic wastes for the treatment of agricultural and fishery residues and food wastes to be recycled as fuel, fertilizer or feed.

Due to the continuous development of the industry with the development of the industry, a large amount of various organic wastes are generated and discharged. Most of these organic wastes contain excess moisture. At present, due to technical and economic limitations caused by the removal of water from organic wastes, most organic wastes are treated by landfill, incineration and marine discharge.

Organic wastes containing moisture such as food waste, purified water and sewage, and sludge, agricultural and fishery residues, manure and food waste from wastewater are recycled into useful resources such as fuel or fertilizer or feed when the water is removed. It has been reported and tested. In addition, it is known through research and reports that organic wastes are caused by landfilling, incineration and marine discharge, and various countries are tightening regulations on the treatment of organic wastes.

Korean Patent Publication No. 88-2174 (October 17, 1988) by Nakasono Shusuo discloses an apparatus and a method using oil to effectively remove water from organic wastes as described above. According to Nakasono Shuusuo, an apparatus for treating organic waste is installed across the hollow rotating shaft in the inner tube of the double pipe, and the hollow disk is provided with a hollow disk and a stirring wing plate for stirring. It is constructed by installing a cutting plate on the plate. In addition, the method for treating organic waste using such an apparatus includes storing animal oil or vegetable oil in the inner tube, and injecting steam into the gap between the inner tube and the outer tube, the hollow rotating shaft, and the hollow disk, thereby storing the animal in the inner tube. Heat oil or vegetable oil. Next, animal and vegetable raw materials are added and immersed in this heating oil, and the heating oil is stirred and heated with a heat medium while depressurizing the inside of the inner tube. At this time, in the initial decompression process, heating is carried out under low pressure-reducing conditions, followed by depressurization to dehydrate water in the raw material. The dehydrated raw material is removed from the apparatus and oil is separated by compression or centrifugation.

However, such a conventional apparatus and method for treating organic waste has a problem in the decompression system, and the drying efficiency has not reached a satisfactory level. In other words, the organic waste in which water is evaporated is forced into the decompression system by depressurization, which causes troubles in the decompression system such as clogging of the connection line, lowering of the decompression rate, and damage to the vacuum pump. In addition, the moisture content of the dried organic waste is difficult to use directly as fuel, fertilizer and feed, there is a need to post-treatment to lower the moisture content.

The present invention is to solve such a conventional problem, the purpose is to prevent the problems occurring in the decompression system so that the water contained without adjusting the moisture of the organic waste to evaporate, dry and recycle as much as possible without obstacles under reduced pressure To provide a system and method for the treatment of organic wastes containing a new type of moisture.

1 is a block diagram of a system for treating organic waste containing moisture in accordance with a preferred embodiment of the present invention;

FIG. 2 is a detailed illustration of the dryer in the system of FIG. 1; FIG.

Figures 3a and 3b is a view for explaining in detail the configuration for preventing the failure of the decompression system in the dryer of Figure 2;

4 is a detailed illustration of the condenser in the system of FIG. 1;

5 is a view for explaining in detail the configuration for preventing the failure of the decompression system in the condenser of FIG.

6 is a block diagram for explaining a configuration for adjusting the stirring speed of the dryer according to the state of the organic waste in the system of FIG.

7 is a view for explaining a state change of the organic waste in the dryer;

8 is a flow chart for explaining a method for treating water-containing organic waste according to a preferred embodiment of the present invention.

* Explanation of symbols for the main parts of the drawings

10 processing system 12 oil tank

14 Raw material input hopper 16 Pre-treatment tank

18: dryer 20: oil hopper

22: oil remover 24: grinder

26: centrifuge 28: conveyor

30 storage tank 32 condenser

34: cooling tower 36: vacuum pump

38: condensate storage tank 40: boiler

According to a feature of the present invention for achieving the above object, a system for treating organic waste containing moisture comprises: a pretreatment tank for storing moisture containing organic waste; An oil tank for storing oil used to remove water from the organic wastes; A hollow rotary shaft operated by a motor, the dryer being configured to remove water from the organic waste supplied from the pretreatment tank by using oil supplied from the oil tank; A boiler for controlling the temperature in the dryer; A vacuum pump for adjusting the pressure in the dryer; A detector for detecting a rod acting on the hollow rotating shaft; A controller for controlling the operation of the hollow rotating shaft by comparing the rod detected by the detector with a preset input value; Means connected to the dryer and the vacuum pump to discharge steam generated in the dryer to the outside; Means for separating oil from organic wastes treated in the dryer.

Such a system for treating water-containing organic wastes of the present invention, in a preferred embodiment, the detector may be an ammeter. The apparatus may further include a vacuum line connecting the pretreatment tank and the dryer. In addition, the discharge means includes a mist separator installed in the dryer; It may include a condenser having an intermediate portion through which coolant is circulated, connected to the mist separator at an upper portion of the intermediate portion, and connected to the vacuum pump at a lower portion of the intermediate portion. In addition, the means for separating the oil may be either an oil remover or a centrifuge.

As described above, the present invention provides a mist separator comprising: a plurality of shield plates arranged to alternate with each other at an interface with the dryer; It may further include a discharge pipe extending into the mist separator, the inlet is bent in an upward direction. In addition, the condenser is connected to the inside of the upper part of the condenser, the partition is formed to be closer to the inner surface of the condenser below the inlet pipe through which steam is introduced from the outside; It may further include a discharge pipe extending from the lower condenser to the inside of the condenser, the inlet is bent in an upward direction. In addition, the wastewater discharged from the condenser may further include a condensate reservoir for purifying using Bacillus bacteria.

According to a feature of the present invention for achieving the above object, a method for treating organic waste containing water comprises the steps of: supplying organic waste in a dryer in which oil is heated to a constant temperature; Detecting a rod acting on the hollow rotating shaft of the dryer and comparing the load with a preset value; When the rod detected in the comparing step is 95% or more, operating the hollow rotating shaft at 1 RPM for 15 degrees in the forward and reverse directions, respectively; When the rod detected in the comparing step is less than 95% and 80% or more, operating the hollow rotary shaft at 1-5 RPM in the forward and reverse directions, respectively; If the load detected in the comparing step is less than 80% and more than 75%, the step of operating the hollow rotation axis in the forward direction 13-15 RPM for a predetermined time.

In the present invention, the step of operating the hollow rotating shaft at 1 RPM by 15 degrees each in the forward and reverse directions may be within 10 minutes after supplying the organic waste to be treated. In addition, the step of operating the hollow rotary shaft in the forward and reverse directions of 1-5 RPM, respectively, may be 20 to 25 minutes after the supply of the organic waste to be treated. In addition, the step of operating the hollow rotating shaft 13-15 RPM in the forward direction for a predetermined time may be 40 or more after supplying the organic waste to be treated. In addition, the time input in the step of operating the hollow rotating shaft at 13-15 RPM in the forward direction may be within 5 minutes.

According to the system and method for treating water-containing organic wastes of the present invention, the water-containing organic wastes are treated under reduced pressure so that the oil contained in the organic wastes is replaced with water using oil as a heat medium. The treatment system of the present invention is equipped with a specially designed mist separator and condenser to prevent faults in the decompression system, such as clogging of the connection line, lowering of the decompression rate, and damage to the vacuum pump, which are caused by forced suction of waste water that is evaporating moisture. Eliminate In addition, the line connecting the pre-treatment tank and the dryer is connected to the vacuum pump so that the waste is transported by a depressurization method so that no power, noise, rapid transfer and odor prevention are achieved.

On the other hand, according to the system and method for treating water-containing organic waste of the present invention, the stirring of the dryer enables inverter control. This makes it possible to improve the drying efficiency by adjusting the operation of the hollow rotating shaft in accordance with the drying state of the organic waste in the dryer. This allows the organic waste with 85% moisture content to be dried at a short time of 40 minutes and at a low temperature of 110 degrees Celsius, so that the water content can be treated to almost 0%. Therefore, it can be used directly as fuel, fertilizer and feed without post-treatment to lower the moisture content.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. In addition, the same reference numerals are assigned to components that perform the same function in the drawings.

1 is a block diagram of a system for treating organic waste containing moisture in accordance with a preferred embodiment of the present invention.

Referring to FIG. 1, the treatment system 10 of the present invention includes an oil tank 12, a feed hopper 14, a pretreatment tank 16, a dryer 18, a oil hopper 20, and an oil remover 22. ), Crusher 24, centrifuge 26, conveyor 28, storage tank 30, condenser 32, cooling tower 34, vacuum pump 36, condensate reservoir 38 and boiler 40 And the like. The oil tank 12 stores animal or vegetable oils used to remove moisture of the organic wastes treated in the dryer 18. In the oil tank 12, oil discharged from the organic waste treated in the dryer 18 is circulated and reused. That is, the organic waste treated in the dryer 18 separates oil from the oil remover 22 or the centrifuge 26, where the discharged oil is stored back into the oil tank 12. Of course, a device may be configured to filter the oil emitted from the organic wastes treated in this process. The pretreatment tank 16 stores the organic waste transported from the outside through the raw material input hopper 14 or the like. The pretreatment tank 16 is connected to the dryer 18 via a vacuum line. The organic waste of the pretreatment tank 16 is supplied to the dryer 18 via a vacuum line by the vacuum pump 36. Therefore, since the organic waste is moved by the decompression method by the vacuum pump 36, it is possible to see the effects of no power, no noise, rapid transfer and odor prevention.

The boiler 40 regulates the temperature in the dryer 18. This is accomplished by circulating the heated steam in the dryer 18 through steam inlets 70 and 71 and steam outlets 72 and 73. Although not shown, the steam supplied into the dryer 18 through the steam inlets 70 and 71 flows between the inner tube and the exterior and inside the hollow rotating shaft 50 and the hollow disk 52 (see FIG. 2). The oil in the dryer 18 is heated.

Vapor generated in the dryer 18 is transferred to the condenser 32 through first and second mist separators 60 and 68 installed in the dryer 18. This is done by the vacuum pump 36 connected to the condenser 32. The steam flowing through the condenser 32 is condensed by the cooling water circulated by the cooling tower 34 and discharged to the condensate storage tank 38. The condensate reservoir 38 treats wastewater generated in the treatment system of the present invention. That is, condensation and storage of steam generated during drying of the organic wastes transferred to the dryer 18 without adjusting the moisture of the organic wastes through the condenser 32, sent to the wastewater treatment plant, and then purified and drained to the outside will be. Of course, the condensate reservoir 38 may be treated immediately. Various methods may be applied to the wastewater condensed in the condensate reservoir 38. In particular, in the present invention, a wastewater treatment method using Bacillus bacteria may be used. Since the method of treating wastewater using this Bacillus bacterium is already known and used, a detailed description thereof will be omitted here.

The organic waste treated in the dryer 18 is transferred to the storage tank 30 via an oil remover 22 or a centrifuge 26. In the preferred embodiment of the present invention, when the organic wastes treated in the dryer 18 are sludge, phosphate manure and livestock sludge generated when treating purified water, sewage, and various wastewater, the centrifugal separator ( 26) to be processed. The organic waste conveyed to the centrifuge 26 is separated from the oil and conveyed to the storage tank 30 via the conveyor 28. When the organic wastes processed by the dryer 18 are food waste, agricultural and livestock residues, and animal debentures, etc., the organic wastes are transferred to the oil remover 22 through the oil hopper 20 and processed. The organic waste conveyed to the oil remover 26 is separated from the oil, pulverized in the crusher 24 and transferred to the storage tank 30 through the conveyor 28. The organic waste stored in the storage tank 30 after the treatment is completed is suitably used as fuel, fertilizer and feed.

2 is a view for schematically explaining a dryer according to a preferred embodiment of the present invention.

Referring to Figure 2, the dryer 18 is a hollow rotary shaft 50 installed across the dryer 18, the hollow rotary shaft 50 is installed at a predetermined interval spaced apart at regular intervals for transporting and stirring organic waste Hollow disk 52, cutting blade 54 for crushing the organic waste to be treated, outlet 55 for discharging the treated organic waste to the outside, drive motor 56 for rotating the hollow rotating shaft 50 ), The organic waste is supplied from the pretreatment tank 16, the pressure in the raw material inlet 58 and the dryer 18 supplied with the oil from the oil tank 12 is reduced, and the steam is discharged to the condenser 32. First and second mist separators 60, 62, and the like, for example.

The dryer 18 according to the preferred embodiment of the present invention is provided with a configuration for solving the obstacle of the specially designed pressure reducing system. 3A and 3B are views for explaining in detail the configuration for solving the failure of the decompression system. 2 to 3B, the configuration for solving the obstacle of the decompression system is installed in the first mist separator 60 of the dryer 18. A concern in the process of depressurizing is the forming phenomenon, which occurs when the depressurization state in the decompression vessel (dryer) changes. In particular, technical measures should be prepared when applying reduced pressure to the disposal of organic waste. To this end, in the system for treating organic waste containing moisture of the present invention, a plurality of shield plates 64 are disposed in the first mist separator 60 so as to cross each other at an interface with the dryer 18. It extends into the first mist separator 60, the inlet is bent upwards and the discharge pipe 62 is installed. The shields 64 may set the interval by calculating the amount of vapor to be decompressed. In addition, air inlet pipes 66 are installed between the shield plates 64. In the first mist separator 60 as described above, the shielding plates 64 prevent the material of boiling or specific gravity lighter than water from being easily absorbed in the dryer 18. Discharge pipe 62 is formed in the inlet in the upward direction to block the flow of the material by temporarily stopping the flow of material when a non-movement occurs. In addition, the air inlet pipes 66 may instantly blow air when material is caught between the shield plates 64 to prevent clogging.

On the other hand, the structure for eliminating the obstacle of the decompression system in the treatment system of the present invention is also configured in the condenser 32 as shown in Figs. The condenser 32 is composed of an upper portion 80, an intermediate portion 82, and a lower portion 84, and an inlet pipe 86 through which the steam flows from the second mist separator 68 is installed in the upper portion 80. do. Cooling water is circulated by the cooling tower 34 in the intermediate portion 82. The lower part 84 is provided with a discharge pipe 90 through which the condensed water cooled through the intermediate part 82 is discharged to the condensate storage tank 38 through the vacuum pump 36. At this time, a partition 88 is installed on the upper portion 80 of the condenser 32. The partition 88 is connected to the inside of the upper portion 80 of the condenser 32 and is formed to be closer to the inner surface of the condenser 32 below the inlet pipe 86. The discharge pipe 90 of the condenser 32 extends from the lower condenser 84 into the condenser 32 and is formed by bending the inlet upward. In particular, in this embodiment, the inlet of the discharge pipe 90, as shown in Figure 5, so that the pipes disposed in the condenser intermediate portion 82 is located in the portion where the location is not located. Such a condenser 32 prevents the water supplied to the vacuum pump 36 for pressure reduction from becoming wastewater.

6 is a block diagram for explaining a configuration for adjusting the stirring speed of the dryer according to the state of the organic waste in the system of FIG.

2 and 6, a processing system according to a preferred embodiment of the present invention detects a load applied to the hollow rotating shaft 50 to control the operation of the hollow rotating shaft 50. This, as will be described later in detail, makes it possible to increase the drying efficiency. To this end, the dryer 18 compares the detector 70 for detecting the rod acting on the hollow rotating shaft 50 and the rod detected by the detector 70 with a predetermined input value to determine the hollow rotating shaft ( A controller 72 is installed for controlling the operation of 50. It is preferable that the detector 70 uses an ammeter installed in the dryer 18 without any additional configuration. The controller 72 operates the hollow rotating shaft 50 by adjusting the driving motor 56 according to the change of the value input from the ammeter.

7 is a view for explaining a change in the state of the organic waste in the dryer.

Referring to FIG. 7, when the organic waste A is placed in the heated oil B, the organic waste A is positioned below the oil B due to the specific gravity difference with the oil as shown in (a). This condition is the stage where oil (B) penetrates into the center of organic waste (A), so that organic waste (A) should be immersed in oil (B) if possible, and oil (B) is well delivered to organic waste (A). The tangled organic waste (A) should be agitated as effectively as possible. Next, as shown in (b), when the organic waste (A) is located in the middle of the oil (B), the moisture of the organic waste (A) itself is almost evaporated and the moisture in the center of the organic waste (A) is rapidly released. The specific gravity of the organic waste (A) is rapidly reduced. Finally, as shown in (c), when the organic waste (A) floats on the oil (B), since the organic waste (A) is almost evaporated to the water in the center, the organic waste is not carbonized by increasing the stirring speed. Instead, the water in oil (B) must be completely evaporated.

In the state of the organic waste in such oil, according to the present invention, as shown in Fig. 8, the organic waste containing moisture is treated. Of course, this method is automatically performed by the processing system described above. That is, in the organic waste treatment method according to the preferred embodiment of the present invention, the organic waste is first introduced into a dryer maintaining the temperature of the oil supplied therein at about 90 to 100 ° C. Then, the temperature in the dryer is relatively lowered and maintained at about 80 to 85 ° C. Within about 10 minutes after the supply of the organic waste, the most intense water evaporation takes place, in which the evaporated water is not in the center of the organic waste but between oil and the organic waste or in the organic waste itself. Therefore, while immersing in the oil as much as possible while stirring the hollow rotary shaft of the dryer by about 15 degrees to the left and right, rather than rotating so that the organic waste is immersed in oil so that oil can penetrate into the organic waste more quickly. At this time, the dryer hollow rotating shaft is operated to about one time in the forward direction (clockwise) and the reverse direction in one minute (S510). In this step (S510), the load acting on the hollow rotating shaft is detected at 95% or more in the ammeter (S500).

Next, about 10 minutes after the first input of the organic waste, the moisture of the organic waste itself is completely evaporated and oil penetrates into the center, so that the specific gravity of the organic waste is gradually reduced. Then, the load of the hollow rotating shaft is reduced while the ammeter falls by about 5 to 10% (S520). In this step, the hollow rotary shaft is rotated by one rotation in the forward direction and the reverse direction, respectively, and the speed is about 1 minute each in left and right (S530). Then, after 20-25 minutes have passed after the organic waste is input, the moisture in the center of the organic waste begins to evaporate and the degree of vacuum inside the dryer is increased. In this step, the rotation speed of the hollow rotating shaft is increased to about 2-5 times each in one minute (S530). This state can be seen as the ammeter of the dryer is indicated as about 20% lower than the initial input (S520). Finally, about 40 minutes after the first input of the organic waste, since the load of the hollow rotating shaft detected by the ammeter is indicated to be 20-25% lower than the original (S540), the remaining five minutes were taken out of the organic waste. It is the time to completely evaporate the water that is not evaporated due to the moisture, and the oil that has coagulated in the oil is rotated about 13-15 times per minute in the direction of the forward rotation of the hollow rotating shaft so that the oil in the oil is released by stirring. (S550).

The treatment process performed by the system and method for treating water-containing organic wastes according to a preferred embodiment of the present invention will be described in more detail with reference to FIGS. 1 to 8. The animal and vegetable oil stored in 12) is supplied to the dryer 18 having a volume of 10M³ by about 5,000 kg by using the vacuum pump 36. The steam of the boiler 40 is injected into the steam inlets 70 and 71 of the dryer 18 so that the temperature of the oil in the dryer 18 is about 90 ° C. to 100 ° C., which is a temperature zone where the gelatine is not dissolved in the oil and is thermally solidified. After heating, about 5,000 kg of organic waste is supplied to the dryer 18 using the vacuum pump 36 in the pretreatment tank 16. The organic waste is continuously heated while cutting and stirring to raise the temperature in the dryer 18 to 135-140 ° C. to maintain the absolute pressure of the dryer 18 at 10-20 mmHg for the first 10 minutes by the vacuum pump 36. 30-40 minutes after the process, the pressure is adjusted to 740-750mmHg close to the vacuum to facilitate the replacement of water and oil in the organic waste tissue. At this time, the steam discharged through the mist separators 60 and 68 of the dryer 18 is condensed in the condenser 32 by the cooling water supplied from the cooling tower 34 and the odor is removed and discharged into the condensate storage tank 38. do. After the reaction is finished, cutting and stirring are stopped and the operation of the vacuum pump 36 is stopped, and then the raw material outlet 55 of the dryer 18 is opened, and solids substituted with oil are poured into the oil hopper 20 instead of water. . The solid is centrifuged or compressed to remove the oil contained in the solid in a centrifuge 26 or oil remover 22 to be treated as a dry flake or powdered solid with no odor. Then, fuel, feed and fertilizer are prepared according to the nutrient composition of the solid. In particular, fuel is used as the heat source of the boiler 40 of the treatment system 10. For example, the solids of sewage sludge contain less than 8% oil, less than 4% moisture, about 15% fat, about 5% protein, and about 74% ash, and the calorific value is about 4800 Kcal / kg to the boiler 40 of the treatment system 10. Can be reused as a heat source. In addition, food wastes contain less than 8% oil, less than 4% moisture, about 12% fat, about 42% protein, and about 42% ash.The solids of agricultural and livestock products such as internal organs, livestock, fish, etc. Feeds containing less than 8% oil, less than 4% moisture, about 12% fat, about 70% protein and about 14% ash are obtained.

By applying the present invention, it is possible to prevent the failure of the decompression system, such as clogging of the connection line, a decrease in the decompression rate, and damage to the vacuum pump generated by the forced inhalation of the waste water vapor evaporated. In addition, the transfer of waste is carried out by a reduced pressure method through a vacuum line, so that no power, no noise, rapid transfer and odor prevention are achieved. In addition, since the moisture content of the treated organic waste reaches almost 0%, it can be directly recycled into fuel, fertilizer and feed without post-treatment to lower the moisture content.

Claims (13)

A pretreatment tank for storing water containing organic wastes; An oil tank for storing oil used to remove water from the organic wastes; A hollow rotary shaft operated by a motor, the dryer being configured to remove water from the organic waste supplied from the pretreatment tank by using oil supplied from the oil tank; A boiler for controlling the temperature in the dryer; A vacuum pump for adjusting the pressure in the dryer; A detector for detecting a rod acting on the hollow rotating shaft; A controller for controlling the operation of the hollow rotating shaft by comparing the rod detected by the detector with a preset input value; Means connected to the dryer and the vacuum pump to discharge steam generated in the dryer to the outside; And a means for separating oil from organic wastes treated in the dryer. The method of claim 1, Wherein said detector is an ammeter. The method of claim 1, And further comprising a vacuum line connecting the pretreatment tank and the dryer, wherein the organic waste of the pretreatment tank is supplied to the dryer through the vacuum line by the vacuum pump. System for processing. The method of claim 1, The discharge means includes a mist separator installed in the dryer; And a condenser connected to the mist separator at the top of the intermediate part and connected to the vacuum pump at the bottom of the intermediate part, wherein the cooling water is circulated. The method of claim 4, wherein The mist separator may include a plurality of shielding plates arranged to alternate with each other at an interface with the dryer; And a discharge pipe extending into the mist separator and formed with an inlet bent upwardly. The method according to claim 4 or 5, The condenser is connected to the inside of the upper part of the condenser, the partition is formed to be closer to the inner surface of the condenser below the inlet pipe through which steam is introduced from the outside; And a discharge pipe extending from the bottom of the condenser to the inside of the condenser, the inlet being bent upwards. The method of claim 1, And said means for separating oil is either an oil separator or a centrifugal separator. The method of claim 4, wherein And a condensate reservoir for receiving wastewater discharged from said condenser and purifying with Bacillus bacteria. Supplying organic waste into a dryer in which the oil is heated to a constant temperature; Detecting a rod acting on the hollow rotating shaft of the dryer and comparing the load with a preset value; When the rod detected in the comparing step is 95% or more, operating the hollow rotating shaft at 1 RPM for 15 degrees in the forward and reverse directions, respectively; When the rod detected in the comparing step is less than 95% and 80% or more, operating the hollow rotary shaft at 1-5 RPM in the forward and reverse directions, respectively; If the load detected in the comparing step is less than 80% and greater than 75%, operating the hollow rotating shaft at 13-15 RPM in the forward direction for a pre-input time. The method of claim 9, Operating the hollow rotating shaft at 1 RPM for 15 degrees in the forward and reverse directions, respectively, within 10 minutes after supplying the organic waste to be treated. The method of claim 9, Operating the hollow rotating shaft at 1-5 RPM in the forward and reverse directions, respectively, when the organic waste to be treated is 20 to 25 minutes after supplying the treated organic waste. The method of claim 9, And operating the hollow rotating shaft at 13-15 RPM in the forward direction for a predetermined time period, wherein the organic waste to be treated is supplied after the processing. The method of claim 9, And the time entered in the step of operating the hollow rotating shaft at 13-15 RPM in the forward direction is within 5 minutes.