JP2011001416A - Method and apparatus for treating waste edible oil - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a practical method and apparatus for recycling a waste edible oil, by which a recycled oil capable of being mixed with kerosene, gas oil, heavy oil, or the like in a high mixing ratio and being used as a diesel fuel oil is obtained from the waste edible oil such as waste tempura oil at a low operation cost in a reduced wastes-generating state, and which can thereby be utilized for economically viable management.SOLUTION: The method for treating the waste edible oil, comprising treating the waste edible oil with a centrifugal separator to remove impurities, thus obtaining a recycled oil, is characterized that the total treating time T for staying the treating waste edible oil in the centrifugal separator is 2 to 20 times the standard staying time T, when the centrifugal separator is used at a standard treating flow rate.

Description

  The present invention relates to a method and an apparatus for obtaining reclaimed oil that can be used as a BDF (Bio diesel fuel) or soap raw material by treating waste edible oil such as tempura waste oil by a physical method, in particular, a centrifugal separation method.

  Waste cooking oil includes, for example, tempura, cutlet, fried, fried potato, sweet potato, fried oil, donut, fried bread, fried rice crackers, carrots and other confectionery, various retort foods, lunch boxes, and other manufacturing facilities, restaurants, and food facilities It is discharged in large quantities from ordinary households, and some are used as raw materials for soap F, but most of them are incinerated.

If these waste edible oils are regenerated as, for example, BDF and can be provided at low cost as fuels for vehicles, ships, cogeneration, etc., alone or mixed with hydrocarbon oils, the use of fossil fuels can be suppressed. In addition to contributing to CO ₂ reduction, a great economic benefit can be obtained.
Various proposals have been made regarding chemical or physical methods for regenerating such waste edible oil, all of which are low in quality of regenerated products and high in cost or generate large amounts of industrial waste. There was a problem, and it was not something that could be used industrially.

  The chemical method requires chemicals such as acids and alkalis, and has a problem that a considerable amount of industrial waste that is difficult to process is generated. Further, since the properties of recycled oil are inferior, the mixing ratio with diesel oil is also low. There is also a problem that light oil mixed with reclaimed oil is regarded as dangerous goods under the Fire Service Law, and there are many restrictions on handling.

  As physical methods, various methods such as filtration, centrifugation, precipitation, dehydration by distillation, impurity adsorption by an adsorbent, extraction of impurities by a solvent such as water and other physical methods, and treatment methods combining these have been proposed. .

However, edible oil has a high viscosity and a large amount of foreign matter, so that it is difficult to perform microfiltration, and there is a problem in that it requires manual labor for replacement and maintenance of filter cloth and the like.
Due to such circumstances, only a filtration method using a wire mesh or the like is only employed as a pretreatment method for other methods, particularly chemical treatment methods.

  Although the centrifugal separation method is recognized to be superior to the filtration or precipitation method, a regenerated oil of a quality that can be used as, for example, BDF cannot be obtained even with a separator having the highest performance at present.

  The precipitation method cannot be put to practical use because edible oil has a high viscosity and thus requires a long time for processing and a large sedimentation tank must be provided.

Dehydration by distillation requires a heat source and cannot remove impurities other than water.
Diesel oil inherently contains some moisture, and there is no problem even if some moisture is contained in BDF mixed in several percent of such diesel oil.
That is, the dehydration process by distillation is actually only a useless process.

  Furthermore, the impurity adsorption method using an adsorbent and the impurity extraction method using water and the like are not practically effective and generate a large amount of industrial waste.

JP 2007-177181 A

JP 2006-104233 A

JP 2003-306682 A

JP 2002-172303 A

JP 2001-104707 A

JP 2000-253838 A

Japanese Patent Laid-Open No. 11-092771

Japanese Patent Application Laid-Open No. 07-316564

JP 07-316564 A

  It is an object of the present invention to provide a practical method for physically regenerating waste edible oil, which can be industrially implemented without receiving financial assistance from others, and an apparatus for carrying out the method.

The present invention provides an improved centrifuge method and apparatus suitable for reclaiming waste edible oil to be treated.
In one embodiment of the present invention, the waste edible oil to be processed is treated with a conventionally known centrifugal method twice or more, 20 times or less, preferably 5 times or more, 15 times or less, more preferably around 10 times. That is, the centrifugation process is repeated 8 to 12 times.
The number of repetitions is determined experimentally in accordance with the composition, specific gravity, temperature and viscosity of the waste edible oil used as a raw material, the nature of impurities, particularly the specific gravity, particle size or molecular weight.

This multi-stage treatment can be performed by a device composed of one service tank and a centrifuge, and a plurality of centrifuges connected in series between a raw material tank and a product tank. It can also be done.
In the former method, the waste edible oil extracted from the service tank is processed by a centrifuge, then returned to the service tank again, circulated multiple times, reaches the required quality level, and becomes a product. .

In the latter method, the raw material oil extracted from the raw material tank sequentially passes through the centrifuges connected in series and is sent to the product tank.
Also, the above-mentioned two-way compromise method is possible. That is, using a device composed of one service tank and a plurality of centrifuges connected in series, waste edible oil extracted from the service tank is sequentially processed by a plurality of centrifuges and then returned to the service tank. The circulation process is performed until the quality is obtained.

In the past, experience has shown that there is a certain limit to the separation of foreign matter by a general industrial centrifuge, and it has been believed that a liquid processed to a certain limit is not effective even if it is repeatedly processed further.
Even with the same oil, machine oil for machining is mainly made of solids such as metals and abrasives in the waste oil, so it can be easily removed by a single centrifugation process. It was out of question.
Multi-stage centrifugation is performed for uranium enrichment, etc., but the fluid to be processed is a gas, and since the specific gravity difference between uranium 235 and 238 to be separated is small, centrifugation is extremely difficult. However, since only a very small concentration can be achieved by a single-stage centrifugal separation process, multistage separation of several tens of stages is necessary.
However, it was believed that the treatment of impurities from waste cooking oil would not be effective even if such multi-stage treatment was performed.

That is, in the case of waste edible oil, the fluid to be treated is a highly viscous gel-like liquid, the specific gravity difference between the substances to be separated is larger than that of uranium enrichment, and centrifugation is relatively easy. In the past, multistage centrifugation was believed to be ineffective.
The idea that multistage processing is ineffective when the specific gravity difference between the substances to be separated is large is correct when the medium is a gas or a low viscosity liquid.
In fact, the performance of today's industrial centrifuges is so high that foreign substances can be almost completely removed from a gas or low-viscosity medium in a single treatment, so that multi-stage treatment has been considered almost meaningless. .

However, a medium that is a high-viscosity polymer compound, such as waste cooking oil, contains various polymers such as fats and proteins derived from animals or plants, degradation products thereof, modified products, and low-molecular impurities. It has been discovered that multistage centrifugation is effective for substances that are mixed or combined to form a gel or semi-gel dispersion.
The present invention has been made based on such knowledge.

  That is, in such a material with high apparent viscosity, the internal structure is destroyed and the structural viscosity is lowered due to the forced flow during the centrifugal separation, but the separation of the foreign matter is hindered by the high viscosity and the internal structure, For this reason, complete separation of foreign matters cannot be performed in a single treatment, and when centrifugal separation is performed in multiple stages, the apparent viscosity of the waste edible oil itself is reduced by thixotropy of the waste vegetable oil for each stage. At the same time, since the oil temperature rises and the viscosity of the medium itself decreases, even when the same separator is repeatedly used, the centrifugal separation efficiency is increased for each stage, so that the effect of multistage treatment can be seen.

As a third embodiment of the present invention, there can be mentioned a method in which an effective treatment is carried out by a single stage treatment by extending the treatment time by one centrifuge.
This treatment time is not less than 2 times and not more than 20 times the rated residence time T of the centrifuge used, desirably not less than 5 times and not more than 15 times, more desirably around 10 times, that is, about 8 times to 12 times. It is recommended.

This apparatus consists of one raw material tank, one centrifuge, and one product tank.
The feed oil is extracted from the feed tank, slowly passes through the centrifuge, and the refined oil is fed into the product tank. The flow rate of the feed oil passing through the centrifuge is less than half of the rated flow rate (standard throughput), preferably less than one fifth, more than one twenty, and more preferably around one tenth. 1/8 or less and 1/12 or more.

The reason why a high degree of purification is achieved when processing at such a low speed is the same as the reason described for the above-mentioned multi-stage processing method. can get.
This processing plant is suitable for relatively small capacity processing facilities.

Moreover, this processing method can be implemented in combination with the above-described multistage processing method.
That is, even in the above-described multistage processing method, by reducing the processing amount per unit time in the centrifugation processing of each stage as described above, a product with the same level of quality can be obtained even if the number of processing stages is reduced.

In still another embodiment of the present invention, the modified centrifugal treatment method is used in combination with a modification treatment by far infrared irradiation.
As the far-infrared light source, a substance that emits strong far-infrared rays at room temperature, for example, black stone silica, tourmaline, or the like is recommended, but a special far-infrared radiation tube or the like may be provided inside the tank.

The far-infrared radiation material mentioned above is filled inside the tank and oil feed pipe, laid down on the bottom of the tank, placed on a net shelf provided in multiple stages inside the tank, and fixed to the inner surface of the tank. Recommended to use.
Since waste cooking oil is not very transparent to far infrared rays, when providing a light source material at the bottom of the storage tank, etc., the temperature and composition of the waste cooking oil in the tank should be made uniform, In order to irradiate uniformly, it is necessary to stir the waste edible oil to be treated.
It is also recommended that this far-infrared treatment apparatus be installed in a raw material oil collecting vehicle.

The effective wavelength region is generally 4 μm or more and 25 μm or less, depending on the composition of the waste edible oil to be processed.
The necessary illuminance can be obtained by using the far infrared ray source.
The time required for the treatment depends on the purity, transparency, temperature, etc. of the waste edible oil to be treated, but approximately 24 hours is sufficient.

When the far-infrared light source is provided inside the raw material tank, the far-infrared irradiation process is performed prior to the centrifugal separation process, and when provided in the product tank, the far-infrared irradiation process is performed after the centrifugal separation process.
When the far infrared light source is provided inside the service tank, the centrifugal separation process and the far infrared process are performed in parallel.

Further, when carrying out the present invention, it is recommended to use a known filtration treatment and precipitation treatment in combination.
That is, when the raw material is received into the raw material tank, pre-filtering is performed using a strainer or an appropriate filter medium, or the supernatant is taken out after being stored in a settling tank for a certain period of time and then sent to the raw material tank. Is recommended.

It is recommended that the treatment apparatus according to the present invention be provided in an area where facilities that generate a large amount of waste food oil are accumulated, such as large airports, ports, and large buildings. This is because in such facilities, it is easy to procure raw materials, and there is a demand for diesel fuel in the area, so-called local production for local consumption becomes possible.
However, on the one hand, it is also recommended that this device be configured as a light truck mounted type or a trailer mounted type.

This is because waste cooking oil must be collected frequently from restaurants, catering facilities, homes, etc., which are distributed over a wide area, and more than 2,000-3 per day from one district. This is because only about 1,000 liters can be collected.
Therefore, in order to collect them efficiently, it is required to use a small scale device with mobility.

Waste edible oil regenerated by the method of the present invention depends on the engine, but alone or mixed with heavy oil, light oil or kerosene, diesel engine fuel for trucks, passenger cars, ships, generators, etc., cogeneration It can be used as fuel for facilities.
Therefore, if the present invention is carried out, the consumption of fossil fuel can be greatly reduced, so that not only global warming can be suppressed, but also domestic production of fuel can be contributed.

As a desirable example of use, the regenerated edible oil obtained by the method of the present invention is mixed with light oil or kerosene at a volume ratio of 1: 1 to obtain a truck fuel for a region where the present apparatus is installed.
Such a mixed fuel has a relatively high flash point and a low risk of ignition, and can be stored and handled easily and safely.
Since the waste edible oil regenerated by the method of the present invention is originally derived from a plant, it is regarded as not generating CO ₂ by carbon neutral theory even if it is burned.

In addition, since the method of the present invention does not use any auxiliary materials such as acid or alkaline chemicals, condensing agents, filter media, etc. other than a small amount of electric power, waste other than a small amount of sludge contained in the raw material is used. Since it does not occur and the waste is derived from plants, it can be easily incinerated, and it is considered that CO ₂ is not generated even when incinerated.

That is, even if the method of the present invention is carried out and the product is used as a fuel, the environment is not adversely affected by the principle of carbon neutral.
Since the apparatus of the present invention can be configured extremely compactly and inexpensively as a vehicle-mounted type as well as a fixed type, it is suitable for collecting a small amount of raw material from a wide area and processing it.

FIG. 1 is a flowchart showing a first embodiment of the method of the present invention. (Method First Example) FIG. 2 is a flowchart showing a second embodiment of the method of the present invention. (Method Second Example) FIG. 3 is an explanatory view showing the configuration of the first embodiment of the apparatus of the present invention. (Device First Example) FIG. 4 is an explanatory view showing the configuration of the second embodiment of the apparatus of the present invention. (Device Second Example)

FIG. 1 is a flowchart showing a centrifugation step in the first embodiment of the method of the present invention.
Here, the far-infrared treatment is not shown, but since this treatment is performed by appropriately providing a far-infrared ray generation source in the raw material and / or product tank, the illustration is omitted here.
This process is a batch system.
Waste edible oil as a raw material is collected by an appropriate method, filtered through a wire mesh or the like, temporarily stored in a raw material tank, and maintained at a predetermined temperature.
A certain amount of waste edible oil from the raw material storage tank is transferred to the service tank, sent to the centrifuge and processed, and when it reaches a certain quality level, it is returned to the service tank. Thereafter, after being circulated as described above a plurality of times, when the edible oil reaches a certain quality level, it is transferred to the product tank.
In this embodiment, a fixed facility is assumed, but all or a main part of the device can be an on-vehicle facility.

When the processing start is instructed in step S0, the process proceeds to step S1, and the liquid levels of all the tanks, that is, the raw material storage tank, the service tank, and the product tank are checked.
If there are enough raw materials in the raw material storage tank, the service tank is empty, and there is room for storage in the product tank, the process proceeds to step S2 and a timer is started. If the above condition is not satisfied, the process proceeds to step S8 and the process is not executed.
The time set in the timer is the time required for processing the waste cooking oil sent to the service tank.
When the timer starts, the process proceeds to step S3, and a certain amount of waste cooking oil is charged in the service tank.

Subsequently, it progresses to step S4 and the raw material oil of a service tank is sent to a centrifuge.
In step S5, the passage of time periodically set in the timer is checked, and the oil discharged from the centrifuge is returned to the service tank again while the timer set time has not elapsed.
When the set time of the timer has elapsed, the process proceeds to step 6 where the service tank liquid level is checked at regular intervals, and until the service tank is emptied, the oil leaving the centrifuge is sent to the product tank and the service tank When becomes empty, the process proceeds to step 8 and the processing is completed.

The embodiment of FIG. 2 is a flowchart in a continuous processing apparatus.
This processing apparatus is connected in series with N (N is a positive integer) centrifuges, and waste food oil to be processed passes through the centrifuges in order to be processed.
When a processing start command is issued in step S10, the liquid levels in the raw material tank and the product tank are checked in step S11.
The tank level check in step S11 is periodically repeated.

Liquid level in the raw material tank is higher than a certain limit level L _P, when the liquid level in the product tank is below a certain limit level L _C proceeds to step S12, the liquid feed pump and all of the centrifuge is started The
The raw material oil sequentially passes through N-series centrifuges connected in series, undergoes centrifugal separation processes 1 to N in steps S131 to S13N, and is sent to the product tank. If it becomes lower than L _P or the liquid level in the product tank becomes higher than the certain limit level L _P LP, the process proceeds to step S15, and the process ends.

FIG. 3 is an explanatory diagram showing the configuration of an embodiment of an apparatus that executes the processing shown in FIG. This apparatus processes in a batch mode.
In the figure, 10 is a raw material tank, 12 is a raw material receiving pipe, 20 is a metering pump, 30 is a service tank, 40 is a pump, 50 is a centrifuge, 60 is a sludge tank, 70 is a three-way selector valve, and 80 is a product tank. , 82 is a shipping line, and 90 is a control device.

  Waste edible oil collected from nearby is stored in the raw material tank 10, and when the controller 90 is instructed to start the processing device, the metering pump 20 is activated and a certain amount of waste edible oil is supplied to the service tank. 30.

At that time, the pump 40 is activated to supply the edible cooking oil in the service tank 30 to the centrifuge 50. The waste edible oil processed in the centrifugal separator 50 is returned to the service tank 30 through the three-way switching valve 70, sucked again by the pump 40, sent to the centrifugal separator 50, and circulated in the same manner. It passes through the centrifugal centrifuge 50 and is processed.
The sludge separated by the centrifuge 50 is stored in the sludge tank 60, the edible oil is collected by a different centrifuge not shown, and the collected oil is returned to the raw material tank 10.

When the preset processing time elapses, the three-way switching valve 70 is switched by a command from the control device 90, and the oil discharged from the centrifuge 50 is sent to the product tank 80, and the service tank 30 is empty. Then, the operation of the pump 40 is stopped and the processing is completed.
The time for circulating the edible oil between the service tank and the centrifuge is at least 2 times, 20 times, preferably 5 times, 15 times, more preferably 10 times for the waste edible oil in the service tank. It is configured to repeatedly pass through the centrifuge before and after, that is, 8 times or more and 12 times or less.
At this time, it is desirable to operate the centrifuge at a standard processing flow rate.

The physical properties of products obtained by treating standard tempura waste edible oils according to the known treatment method and the first embodiment of the method of the present invention were compared.
The results are shown in the table below.
In this comparative test, a DISC SEPARATOR separator plate type centrifugal separator SJ / OP series: SJ10F manufactured by Mitsubishi Chemical Corporation was used as a centrifugal separator.

Sample A is tempura waste cooking oil collected from a general household.
The sample A contains a large amount of carbon fine particles, and is therefore black opaque.
Sample B is obtained by processing Sample A by a known single centrifugation process.
A considerable effect can be seen even in a single separation process.
From the black sample A, it is recognized that a considerable amount of carbon fine particles have been removed, but the product is still black and has a low transparency and a semi-turbid state.
This indicates that fine carbon particles and other impurities still remain.
However, according to the conventional technical common sense, it is believed that it is impossible to improve the quality by separating and removing these remaining impurities even if the centrifugation is further performed.

Sample C was obtained by subjecting sample A to centrifugal treatment 10 times and far-infrared treatment for 24 hours.
Sample C is a clear liquid that is not blackish and has a bright red-orange turbidity.
Thus, samples B and C have different properties. This indicates that the quality of the reclaimed oil has been improved by the method of the present invention.

It should be noted that sample B obtained by processing by the conventional method had a limit of about 5% when added to light oil, but sample C obtained by processing according to the present invention was light oil. In contrast, it is usually possible to add up to about 50%.
Sample D obtained by mixing the regenerated oil obtained by the present invention with light oil 1: 1 is publicly usable as diesel fuel oil, and its flash point is as high as 85.5 ° C. Since it is not recognized as a volatile oil, it can be provided at low cost.
In addition, when the method of the present invention is carried out, a small amount of sludge is generated, but since there is no generation of waste such as glycerin, the yield of refined oil is good, and the waste disposal cost is small and economical.

Recycled oil with improved quality can be used as fuel for trucks, passenger cars, etc. by mixing with the same amount of diesel diesel oil as described above, and any of engine performance, exhaust gas, and fuel consumption can be used. It was confirmed that there was no problem.
When reclaimed oil is blended at such a high blending ratio, the flash point of the mixed fuel rises so that it does not correspond to a dangerous substance under the fire fighting regulations, and the regulations on handling become loose.
The blending ratio with respect to light oil is 60 or less, 20% or more, desirably about 50% by volume.

  If the blending ratio is 20% or less, it may be used as a diesel engine oil, but it may be regarded as a dangerous article under fire laws and regulations for reasons such as an insufficient increase in flash point. If blended in an amount of 60% or more, the quality as a fuel may be insufficient depending on the engine.

FIG. 4 is an explanatory diagram showing the configuration of an embodiment of an apparatus that executes the processing shown in FIG. 2, and performs processing in a continuous flow system.
In the figure, 110 is a raw material tank, 112 is a raw material receiving pipe, 140 is a pump, 150, 152, 154, 156 and 158 are centrifuges connected in series, 160 is a sludge tank, 180 is a product tank, 182 is a shipment A line 190 is a control device.

In this apparatus, when there is waste cooking oil that becomes a raw material of a certain amount or more in the raw material tank 110 and there is a margin in the product tank 180, the pump 140 is operated, and the raw materials are removed from the centrifuges 150, 152, 154, 156 and 158. The raw material oil is sequentially centrifuged by these centrifuges and fed into the product tank 180.
The pump 140 and the centrifuges 150, 152, 154, 156 and 158 are stopped when the raw material tank 110 is empty or the product tank 180 is full.
Although an example in which five centrifuges are installed has been described above, the number of installed centrifuges is not limited to five, and may be changed as appropriate according to the properties of the raw materials. Thus, in the present invention, it is 2 or more, preferably 5 or more and 20 or less, preferably 5 or more and 15 or less, and more preferably around 10 groups, that is, 8 or more and 12 or less. .
If the number of installed centrifuges is 2 to 4, high quality products may not be obtained depending on the quality of the raw material oil. Even if 20 or more units are installed, the quality of recycled edible oil is hardly improved. I can't.
The number of installed centrifuges is determined empirically or experimentally depending on the quality of the waste edible oil used as a raw material and the quality required for the product.
At this time, it is desirable to operate each centrifuge at a standard processing flow rate.

As will be understood from the above description, in the present invention, the processing time by a known centrifuge is 2 times or more, preferably 5 times or more, 20 times or less, more preferably about 10 times, that is, 8 times or more, Centrifugation is performed for a long time of 12 times or less.
Such processing can also be achieved by methods and apparatuses other than the above-described embodiments.
For example, in the apparatus shown in FIG. 2, the use of two centrifuges connected in series can achieve the object while reducing the processing time by half.

  In the above description, the centrifuge is operated at its standard processing flow rate. However, if these are used at a lower flow rate, the residence time per unit becomes longer, so the apparatus shown in FIG. The number of recirculations to the service tank can be reduced, and the number of installed centrifuges can be reduced in the apparatus shown in FIG.

In the above-described apparatus, it is desirable to provide a far-infrared emitting substance in various tanks, that is, a raw material tank, a service tank and / or a product tank, particularly a product tank, thereby improving the quality of the product.
Thus, when the far-infrared treatment is performed on the waste edible oil and / or the refined product as a raw material, the quality of the product is improved.

In addition, it is recommended that these processing apparatuses be provided with various auxiliary facilities.
For example, it is recommended to install a stirrer in the raw material tank or product tank in order to make the temperature and composition of the oil uniform, and depending on the temperature, temperature and viscosity of the waste cooking oil, the waste cooking oil used as the raw material If the oil temperature becomes too high during centrifugation, it is recommended to install a cooler, radiator, etc. to lower the oil temperature. It is also desirable to provide a device for measuring the physical properties of the intermediate process oil, product, etc., and adjusting the processing time so that a product of the desired quality can be obtained.

Since the method of the present invention is low in equipment installation cost and operation cost, according to the present invention, a high-grade fuel oil can be obtained by effectively using waste edible oil that has been incinerated and disposed of in the past. Therefore, a company that implements the method of the present invention can manage economically independently.
Moreover, since the product obtained by the present invention has a high flash point, it can be handled safely.
Further, when the method of the present invention is used, no by-product such as glycerin is generated, and therefore, industrial waste is very small, so that no cost is required for environmental protection measures.

10, 110 Raw material tank 20 Metering pump 30 Service tank 40, 140 Pump 50 Centrifuge 150, 152, 154, 156, 158 Centrifuge 60, 160 Sludge tank 70 Three-way switching valve 80 Product tank 90, 190 Controller

Claims (12)

In a waste edible oil processing method for treating waste edible oil with a centrifuge to remove impurities and obtaining a regenerated oil, the total processing time T during which the edible edible oil to be treated stays inside the centrifuge is determined by the centrifuge. its standard processing flow at twice the standard residence time T _S of using more than the above waste edible oil treatment method characterized by a 20-fold or less. Total processing time T by the centrifuge, the standard residence time T _S 5 times more, cooking oil treatment method according to claim 1 is 15 times or less. Total processing time T by the centrifuge, the standard residence 8 times the time T _S, cooking oil treatment method according to claim 1 is 12 times or less.   4. The waste food oil to be treated is repeatedly circulated and supplied to one centrifuge, and subjected to a centrifuge process a plurality of times by the centrifuge. Waste cooking oil treatment method.   The waste food oil to be treated is supplied to a plurality of centrifuges connected in series, and the waste edible oil to be treated is sequentially centrifuged by these centrifuges. The waste edible oil treatment method according to any one of 1 to 3.   The waste edible oil treatment according to any one of claims 1 to 3, characterized in that waste food oil to be treated is supplied to the centrifuge at a flow rate equal to or less than a standard treatment flow rate of the centrifuge to be used. Method.   The waste edible oil treatment method according to any one of claims 1 to 6, further comprising a far infrared irradiation step.   An apparatus for carrying out the waste edible oil treatment method according to claim 1, wherein a service tank into which waste edible oil as a raw material is introduced, at least one centrifuge, and a treated product are received. A product tank, a pump for supplying waste edible oil in the service tank to the centrifuge, and a transport line for the treated waste food oil provided on the delivery side of the centrifuge for the service tank or A waste edible oil treatment apparatus equipped with a three-way selector valve that selectively switches for product tanks.   It is an apparatus for implementing the waste edible oil processing method of Claim 1, Comprising: The raw material tank into which the waste edible oil used as a raw material is introduce | transduced, the product tank which receives the processed product, a raw material tank and a product tank A waste edible oil treatment apparatus comprising a plurality of centrifuges connected in series and a pump that supplies waste edible oil in a raw material tank to the centrifuge.   It is an apparatus for implementing the waste edible oil processing method of Claim 1, Comprising: The raw material tank into which the waste edible oil used as a raw material is introduced, the product tank which receives the processed product, a raw material tank, and a product tank A waste edible oil treatment apparatus comprising: at least one centrifuge provided between the pump and a pump for supplying waste edible oil in a raw material tank to the centrifuge.   The waste edible oil processing apparatus according to any one of claims 8 to 10, wherein a far-infrared radiation source is provided in at least one of a raw material tank, a service tank, and a product tank.   The waste edible oil treatment apparatus according to any one of claims 8 to 11, which is mounted on a truck or a trailer.

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