KR101847082B1 - Recycling apparatus of organic waste and, its recycling method - Google Patents

Abstract

The present invention relates to an apparatus for treating various pollutants contained in organic wastes and recycling them,
The organic wastes are subjected to solid-liquid separation and separated into solid waste liquid wastes, respectively, and reprocessed. The condensed water generated by the solid waste is supplied to the first anaerobic digester 60 to be recycled, The purified water generated by the membrane filter 72 is supplied to the cooling tower 44 and recycled as cooling water,
By constructing the apparatus for treating organic wastes in an area where the treatment with the sewage end treatment plant is impossible, it is possible to reduce environmental pollution sources due to the treatment of the organic wastes and to minimize human and material costs.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for treating organic wastes,

The present invention relates to a treatment apparatus and a treatment method for recycling organic wastes. More particularly, the organic wastes are separated into solid wastes and liquid wastes, respectively, and the solid wastes are dried and recycled as raw materials for fertilizer and feed, The condensed water generated in the drying process of the solid waste and the waste liquid of the liquid waste are subjected to an anaerobic process to produce biogas to be recycled as a dry heat source and the waste liquid generated in the anaerobic process can be recycled as cooling water of a cooling tower And a method of processing the same.

In general, organic wastes are collectively referred to as food wastes generated in homes or restaurants, sludges generated in sewage / wastewater treatment plants, etc. Such organic wastes contain not only a large amount of water but also odor due to corrosion, It has been widely practiced to form a solid material having a very low water content through carbonization and treat it in the same manner as compost, feed and solid fuel fillet.

For example, in order to lower the water content of the organic waste, as shown in FIG. 1, the dehydration step is performed, the dehydrated waste is dried to lower the water content, the dried waste is crushed, A processing system has been proposed in which foreign matter is removed through magnetic force selection and then used as fertilizer.

However, the treatment system of FIG. 1 is a method of recycling the organic waste as a feed without being buried or incinerated, and there has been a problem that leachate or condensed water is generated in the dehydration step and the drying step, thereby polluting the surrounding environment.

In particular, the treatment system shown in FIG. 1 is a method of drying the organic waste to lower the water content, and a heat source (burner) for continuously heating the organic waste is required to the dryer, It is not possible to apply the system because it can not be applied due to an increase in the consignment processing cost in an area where the discharge of the condensed water from the incapable region or the effluent can not be performed.

Therefore, solid wastes are dried and recycled as fertilizer or feed, and the biogas generated in the anaerobic digestion process of the liquid waste is recycled as a heat source, There is an urgent need to reduce the environmental pollution source as well as the total resources of the organic waste by reusing it as cooling water.

Japanese Patent Application Laid-Open No. 10-2015-0019062 (Publication Date: Feb. 25, 2015) Patent Registration No. 10-1367745 (Registered on Feb. 20, 2014) Patent Registration No. 10-1228483 (Registered on Feb. 25, 2013) Patent Registration No. 10-1374559 (Registered on Apr. 3, 2014)

SUMMARY OF THE INVENTION Accordingly, the present invention has been made in order to solve the above problems, and it is an object of the present invention to solve the above problems, The condensate generated in the process and the waste liquid of the liquid waste can be recycled as a dry heat source through an anaerobic process and the anaerobic digestion effluent can be recycled to the cooling water of the cooling tower, And a method for processing the same.

According to an aspect of the present invention, A crushing separator for crushing and sorting the organic waste; A solid-liquid separator for separating the organic wastes, which are crushed and sorted by the crushing separator, into solid wastes and liquid wastes, respectively; A dryer for drying the solid waste separated by the solid-liquid separator; A steam processor for exchanging steam generated by the dryer through a condenser and cooling the steam through a cooling tower; A three-phase separator for extracting oil from the liquid waste separated by the solid-liquid separator; A first anaerobic digester for producing biogas by treating the liquid waste separated from the oil by the three-phase separator in an anaerobic state; A second anaerobic digester for treating the condensed water generated by the condenser in an anaerobic state; An aerobic fire extinguisher which treats the digested waste liquid treated in the first anaerobic digester and the second anaerobic digestor in an aerobic condition to remove residual organic matter and nitrogen of high concentration; A heat source supplier for supplying the biogas generated by the first anaerobic digester to the heat source of the dryer; A membrane filter for filtering impurities including particulate matter remaining after passing through the aerobic digester; And a cooling water supply line for supplying cooling water required for cooling the cooling tower from the membrane filter.

A processing method for achieving the above object comprises: A crushing and sorting step of crushing the organic waste and sorting the foreign matter; A dehydrating step of dehydrating organic wastes supplied in the crushing and sorting step and separating the organic wastes into solid wastes and liquid wastes; Drying the solid waste separated in the dewatering step; A steam treatment step of heat-exchanging steam generated in the drying step using a condenser and cooling the steam using a cooling tower; An oil extraction step of extracting oil fractions by three-phase centrifugation of the liquid waste separated in the dehydration step; A first anaerobic treatment step of treating the liquid waste separated from the oil in the anaerobic state in the oil extraction step to reduce the contamination concentration and produce biogas; A second anaerobic treatment step of treating the condensed water generated by the condenser in an anaerobic state in the steam treatment step; An aerobic treatment step of treating the digested waste liquid treated in the first anaerobic digestion step and the second anaerobic digestion step in an aerobic state to remove residual organic matter and high concentration nitrogen; A membrane filtration step of filtering a foreign substance including particulate matter remaining after passing through the aerobic treatment step; And a filtration water supply step of supplying filtration water from the membrane filtration step to the cooling tower.

As described above, the apparatus for treating organic wastes according to the present invention includes at least the following effects.

First, the biogas is produced using the condensed water generated by the solid waste and the waste liquid generated by the liquid waste, and the energy cost of the processing apparatus is reduced because the biogas is used as a heat source for the drying process.

Secondly, by recycling the solid wastes, which are completed by the dryer with the drying operation, as fertilizer or feed, the organic wastes can be completely recycled.

Thirdly, the effluent water generated from the first anaerobic digester and the second anaerobic digester is treated by an aerobic digester and a membrane filter, and then supplied to the cooling tower and reused as cooling water. Thus, the consignment treatment cost is remarkably reduced, Is minimized.

Fourth, since it is not necessary to use cooling water such as ground water or water in the heat exchange process of the condensed water separated from the organic waste, it is economical to save 50 to 100 tons of cooling water at least per day as the condensed water.

Fifth, by constructing the apparatus for treating organic wastes in an area which can not be processed in connection with the sewage end treatment plant, it is possible to reduce environmental pollution sources due to the treatment of the organic wastes, and to minimize human and material costs.

1 is a conceptual diagram showing an apparatus for treating organic wastes according to the prior art,
2 is a conceptual diagram showing an apparatus for treating organic wastes according to the present invention.

Hereinafter, an embodiment according to the present invention will be described.

As shown in Fig. 2, the treatment apparatus according to the present invention comprises a crushing separator 10 for crushing and sorting organic wastes; A solid-liquid separator (20) for separating organic wastes, which are crushed and sorted by the crushing separator (10), into solid wastes and liquid wastes, respectively; A dryer 30 for drying the solid waste separated by the solid-liquid separator 20; A steam processor (40) for exchanging heat generated by the dryer (30) through a condenser (42) and cooling the steam through a cooling tower (44); A three-phase separator (50) for selectively extracting oil from the liquid waste separated by the solid-liquid separator (20); A first anaerobic digester (60) for producing biogas by treating the liquid waste separated from the oil by the three-phase separator (50) in an anaerobic state; A second anaerobic digester (70) for treating the condensed water generated by the condenser (42) in an anaerobic state; An aerobic fire extinguisher (80) for treating the digested waste liquid treated in the first anaerobic digester (60) and the second anaerobic digester (70) in an aerobic state to remove residual organic matter and nitrogen of high concentration; A heat source supplier (90) for supplying the biogas generated by the first anaerobic digester (60) to the heat source of the dryer (30); A membrane filter (100) for filtering foreign substances including particulate matter remaining after passing through the aerobic digester (80); The membrane filter (100) comprises a cooling water supply line (46) for supplying cooling water required for cooling the cooling tower (44).

As shown in FIG. 2, the treatment method according to the present invention comprises: a crushing-screening step of crushing organic wastes and selecting foreign matters; A dehydrating step of dehydrating organic wastes supplied in the crushing and sorting step and separating the organic wastes into solid wastes and liquid wastes; Drying the solid waste separated in the dewatering step; A steam treatment step of heat-exchanging and cooling the water vapor generated in the drying step; An oil extraction step of extracting oil fractions by three-phase centrifugation of the liquid waste separated in the dehydration step; An anaerobic treatment step of treating the liquid waste separated from the oil in the anaerobic state in the oil extraction step to reduce the pollution concentration and produce biogas; An aerobic treatment step of treating the digested waste liquid separated in the anaerobic treatment step in an aerobic state to remove residual organic matter and nitrogen; A step of supplying condensed water formed in the steam treatment step to the anaerobic treatment step and recycling the condensed water as a heat source; And a heat source supply step of supplying the biogas generated in the anaerobic treatment step to the drying step and recycling the biogas as a heat source.

The treatment device 1 separates the organic wastes into solid wastes and separates them into solid wastes liquid wastes and re-treats them. The condensed water generated in the drying process of the solid wastes is subjected to anaerobic treatment in the second anaerobic digester 70 And the purified water filtered by the membrane filter 100 of the aerobic digester 80 is supplied to the cooling tower 44 and recycled as cooling water.

Particularly, the treatment apparatus 1 is characterized in that biogas, which is a heat source of the dryer 30, is generated by reprocessing the wastewater of the liquid waste with the first anaerobic digester 60.

The crushing and sorting machine 10 is used to selectively remove various foreign substances such as vinyl, metal, and plastic contained in the organic waste, and to crush the organic waste to a size suitable for processing the organic waste as a raw material for drying and fertilizing. It is preferable that the waste crusher and the sorter are sequentially constructed.

At this time, the crusher of the organic waste is preferably a screw crusher having an excellent crushing efficiency.

The solid-liquid separator (20) separates the organic wastes, which are crushed into a proper size, into solid wastes and liquid wastes, as well as foreign substances are removed by the crushing separator (10) A centrifugal separation method for removing liquid waste is preferable.

The dryer (30) reduces the water content of the solid waste separated by the solid-liquid separator (20) to at least 10% or less. The drying temperature of the dryer (30) is preferably 100 to 150 ° C, The time is preferably 2 to 3 hours, but it is natural that the drying temperature and the drying time can be appropriately adjusted if the water content can be lowered to the range of 10% or less.

At this time, the solid waste that the drying operation is completed by the dryer (30) is crushed and sorted. In this case, it is preferable to use a vibration screening device using a mesh network or a magnetic separator using a magnetic force as a sorting device for solid waste, but the application of the specific gravity separator using the specific gravity difference is also included in the technical category of the present invention. The crushed and sorted solid waste is recycled as a raw material for fertilizer or feed, and is provided with a dry matter discharge line (not shown) for supplying the dried material to the fertilizer or feed manufacturing process.

The steam processor 40 is for recycling water vapor generated during the heating process of the dryer 30 and includes a condenser 42 for heat-exchanging water vapor supplied by the dryer 30, And a cooling tower 44 for cooling the submersible supplied by the cooling tower 44.

At this time, the water vapor which is vaporized by the cooling tower 44 may be filtered by a filter to release the harmful components in a minimized state.

It is preferable that the condensed water of the condenser 42 and the cooling water of the cooling tower 44 communicate with each other.

The three-phase separator 50 is a three-phase centrifugal separator that extracts the liquid wastes separated by the solid-liquid separator 20 and extracts the liquid wastes by a specific gravity difference due to the centrifugal force .

At this time, the oil separated by the three-phase separator 50 is preferably used as soap, biodiesel, power plant fuel or the like by filtering possible harmful components.

The first anaerobic digester 60 processes the liquid waste separated from the oil by the three-phase separator 50 in an anaerobic state. The first anaerobic digester 60 adjusts the pH to about 7 at a temperature of 35 to 55 ° C To convert the high concentration organic components in the liquid waste into biogas.

At this time, since various methods related to the first anaerobic digester 60 are known, detailed description thereof will be omitted.

The second anaerobic digester 70 serves to anaerobically treat the condensed water heat-exchanged by the condenser 42 and to supply it to the aerobic digester 80. At this time, the anaerobic treatment method of the second anaerobic digester 70 is preferably a process such as UASB (Upflow anaerobic sludge blanket).

Meanwhile, the condensed water heat-exchanged by the condenser 42 may be supplied to the first anaerobic digester 60 to be anaerobically treated in one water tank. However, the concentration of the organic matter in the condensed water is about 8 times lower than that of the liquid waste, And organic matter is composed of substances that are biologically degradable. Therefore, liquid wastes can be anaerobically digested within about 5 days, compared to a very long residence time required for anaerobic digestion of about 20 to 30 days. Therefore, it is preferable that the second anaerobic digester 70, which is different from the first anaerobic digester 60, is separately constructed and operated in a condensate having a short residence time required for anaerobic digestion. Thus, the size of the first anaerobic digester can be reduced by 4 to 6 times, and the anaerobic treatment time can be greatly reduced.

Also, in addition to the biogas generated by the first anaerobic digester 60, biogas generated by the second anaerobic digester 70 may be supplied to the heat source supplier 90 and used.

The aerobic digester (80) treats the digested waste liquid separated by the first anaerobic digester (60) in an aerobic state to remove various organic substances and nitrogen contained in the extinguishing waste liquid. The first anaerobic digester 60, a blower for supplying oxygen to the extinguishing waste liquid, and a temperature controller for maintaining the extinguishing waste liquid at a set temperature.

At this time, the treated water passing through the aerobic fire extinguisher 80 may be discharged through the sewage end treatment or the filtered water passing through the membrane filter 100 may be discharged through the sewage pipe. In the present invention, It is used as cooling water.

The treated water that has passed through the aerobic fire extinguisher 80 may remove the chromaticity of the treated water using an activated carbon filter or an ozone oxidizer.

The aerobic fire extinguisher 80 removes foreign matter by a membrane filter 100 that filters substances such as salts including particulate matter remaining in the extinguishing waste liquid, and the filtered water from which the foreign substances are removed passes through a cooling water supply line 46 ) To the cooling tower (44).

The digested waste liquid flowing into the aerobic digester 80 is mixed with the treated water of the first anaerobic digester 60 anaerobically treated with the liquid waste and the treated water of the second anaerobic digester 70 anaerobically treated with condensed water, As a result, the digested waste liquid flowing into the aerobic digester 80 dilutes the digested waste liquid and has a very low salinity concentration when the treated water of the first anaerobic digestive unit 60 is introduced, There is an effect that it becomes easy.

Of course, the digested waste liquid passing through the first anaerobic digester 60 may be subjected to ANAMMOX or an activated sludge process to remove residual organic matter and nitrogen at a high concentration. At this time, Oxidizing and converting into nitrogen.

When the high concentration nitrogen is treated using the activated sludge process, the condensed water can be treated as an external carbon source for nitrogen removal.

In particular, when the anomox is applied, the cost of operating the blower of the aerobic fire extinguisher 80 as well as the sludge due to denitrification is reduced, and the operation cost can be drastically reduced as compared with the activated sludge method.

In addition, a MBR (Membrane Biology Reactor) may be further applied to the extinguishing waste flowing into the aerobic digester 80.

The heat source supply unit 90 receives the biogas generated during the reaction of the first anaerobic digestion unit 60 and converts the biogas into a gas to provide a heat source necessary for the treatment of the organic waste including the dryer 30 Performs the function of the boiler.

Hereinafter, the operation according to the present invention will be described.

First, in order to operate the processing apparatus 1 according to the present invention, the organic waste contained in the crushing separator 10 should be crushed to a size appropriate for the drying operation, with the foreign matter such as vinyl or metal being removed.

Then, the organic waste is separated into the solid waste and the liquid waste through centrifugation by performing the dehydration treatment at the setting time and the set speed in a state where the organic waste is accommodated in the solid-liquid separator 20.

Then, when the solid waste is accommodated in the dryer (30) and heated for a set temperature and a set time, the solid waste is discharged to the user through the dried waste discharge line.

In this case, steam generated in the dryer 30 is heat-exchanged through the condenser 42 and then cooled through the cooling tower 44. Particularly, the condensed water generated by the condenser 42 flows into the second anaerobic digester 70 Lt; / RTI >

The liquid waste separated by the solid-liquid separator 20 is removed through the three-phase separator 50 and then the first anaerobic digester 60, the aerobic digester 80 and the membrane filter 100 ).

At this time, the condensed water anaerobically treated in the second anaerobic digester 70 is supplied to the aerobic digester 80 as a digested waste liquid.

The purified water filtered by the membrane filter 100 is recycled by the cooling tower 44 to perform a cooling function. Particularly, the sludge or concentrated liquid filtered by the membrane filter 100 is re- desirable.

That is, by recycling the purified water of the membrane filter 100 as cooling water, the cooling cost of the cooling tower 44 can be reduced, and the waste water can be freely discharged.

The biogas produced by the microbial reaction of the first anaerobic digester 60 is supplied to the heat source supplier 90 and then used to heat the solid waste contained in the dryer 30 .

That is, by using the biogas generated by the first anaerobic digester 60 as a heat source of the dryer, the energy cost required for the dryer 30 is reduced.

In addition, by using the biogas generated by the second anaerobic digester 70 as a heat source of the dryer, the energy cost required for the dryer 30 is reduced.

As described above, the present invention is not limited to the above-described embodiments, and various changes and modifications may be made without departing from the scope of the present invention as defined in the appended claims. And such modifications are within the scope of the present invention.

10: crushing separator 20: solid-liquid separator
30: dryer 40: steam processor
42: condenser 44: cooling tower
46: Cooling water supply line 50: Three phase separator
60: First anaerobic digester 70: Second anaerobic digester
80: aerobic fire extinguisher 90: heat source feeder
100: membrane filter

Claims (11)

A crushing separator (10) for crushing and sorting organic wastes;
A solid-liquid separator (20) for separating organic wastes, which are crushed and sorted by the crushing separator (10), into solid wastes and liquid wastes, respectively;
A dryer 30 for drying the solid waste separated by the solid-liquid separator 20;
A steam processor (40) for exchanging heat generated by the dryer (30) through a condenser (42) and cooling the steam through a cooling tower (44);
A three-phase separator (50) for selectively extracting oil from the liquid waste separated by the solid-liquid separator (20);
A first anaerobic digester (60) for producing biogas by treating the liquid waste separated from the oil by the three-phase separator (50) in an anaerobic state;
A second anaerobic digester (70) for treating the condensed water generated by the condenser (42) in an anaerobic state;
An aerobic fire extinguisher (80) for treating the digested waste liquid treated in the first anaerobic digester (60) and the second anaerobic digester (70) in an aerobic state to remove residual organic matter and nitrogen of high concentration;
A heat source supplier (90) for supplying the biogas generated by the first anaerobic digester (60) to the heat source of the dryer (30);
A membrane filter (100) for filtering foreign substances including particulate matter remaining after passing through the aerobic digester (80);
The membrane filter (100) includes a cooling water supply line (46) for supplying cooling water required for cooling the cooling tower (44)
The second anaerobic digester 70 uses an upflow anaerobic sludge blanket (UASB) process,
Wherein the heat source supplier (90) is further supplied with biogas generated by the second anaerobic digester (70). The apparatus according to claim 1, wherein the dryer (30)
Further comprising at least one of a vibration discriminator using a mesh network, a magnetic separator using magnetic force, or a non-separator using a specific gravity difference, so that the solid waste is crushed and sorted. 2. The apparatus according to claim 1, wherein the three-phase separator (50)
Wherein the liquid waste separated by the solid-liquid separator (20) is separated into at least three specific gravity layers by centrifugal force, and then the specific gravity layer in which the oil is located is selectively extracted. Processing device. delete The aerobic fire extinguisher (80) according to claim 1, wherein the aerobic fire extinguisher (80)
Characterized in that the digested waste liquid is subjected to ANAMMOX or an activated sludge process to remove residual organic matter and nitrogen at a high concentration. The method according to claim 1, wherein the second anaerobic digester (70)
Wherein the aerobic digester (80) supplies the condensed water to the aerobic digester (80) with a butane desorption for nitrogen removal when the residual organic matter and the high concentration of nitrogen are removed through the activated sludge process. delete A crushing and sorting step of crushing the organic waste and sorting the foreign matter;
A dehydrating step of dehydrating organic wastes supplied in the crushing and sorting step and separating the organic wastes into solid wastes and liquid wastes;
Drying the solid waste separated in the dewatering step;
A steam treatment step of heat-exchanging steam generated in the drying step using a condenser and cooling the steam using a cooling tower;
An oil extraction step of extracting oil fractions by three-phase centrifugation of the liquid waste separated in the dehydration step;
A first anaerobic treatment step of treating the liquid waste separated from the oil in the anaerobic state in the oil extraction step to reduce the contamination concentration and produce biogas;
A second anaerobic treatment step of treating the condensed water generated by the condenser in an anaerobic state in the steam treatment step;
An aerobic treatment step of treating the digested waste liquid treated in the first anaerobic treatment step and the second anaerobic treatment step in an aerobic state to remove residual organic matter and high concentration nitrogen;
A membrane filtration step of filtering a foreign substance including particulate matter remaining after passing through the aerobic treatment step;
And a filtration water supply step of supplying filtration water from the membrane filtration step to the cooling tower,
The second anaerobic treatment step uses an upflow anaerobic sludge blanket (UASB) process,
In the drying step, the heat source for drying the solid waste is used as the biogas in the first anaerobic treatment step,
Wherein the drying step further uses a biogas in the second anaerobic treatment step as a heat source for drying the solid waste. delete delete delete

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