An anaerobic digestion system for organic waste combined with a thermal hydrolysis device that improves energy consumption efficiency.

Abstract

An anaerobic digestion system for organic waste combined with a thermal hydrolysis unit that has improved energy consumption efficiency is disclosed. According to one aspect of the present invention, the anaerobic digestion system for organic waste combined with a thermal hydrolysis unit is provided, comprising: a thermal hydrolysis unit that receives organic waste and performs thermal hydrolysis; a first storage tank that receives and stores the liquid component discharged from the thermal hydrolysis unit; an anaerobic digestion tank that receives the liquid component from the first storage tank to digest organic matter and produce biogas; and a dehydrator that mechanically dehydrates the digested sludge discharged from the anaerobic digestion tank.

Description

【Technical Field】 【0001】 The present invention relates to an anaerobic digestion system for organic waste combined with a thermal hydrolysis device with improved energy consumption efficiency. 【Background Art】 【0002】 The content described in this part only provides background information for the present embodiment and does not constitute the prior art. Due to institutional reforms such as the prohibition of direct landfill and ocean dumping of organic waste, there has been a rapid increase in interest in reducing, recycling organic waste, and producing biogas using organic waste. Anaerobic digestion is a treatment method very suitable for the reduction and stabilization of organic waste. In particular, methane (CH4) gas generated during the anaerobic digestion process corresponds to an environmentally friendly fuel source. 【0003】 Generally, the organic waste applied to anaerobic digestion is surplus sludge discharged during the secondary wastewater treatment process, and the surplus sludge contains a considerable amount of refractory organic matter such as microbial cell debris. Since such organic waste is composed of a complex and hard structure, biodegradation is slow or difficult. In addition, such organic waste also has limitations in weight reduction using mechanical dehydration by internal water in cells or interstitial water between cells. To solve the above problems, conventionally, physical, chemical, or combined pretreatment combining two or more has been applied, but there are limitations in applicability due to energy consumption, secondary pollution, etc. 【0004】 Thermal hydrolysis using high temperature and high pressure is a pretreatment technology for anaerobic digestion that has recently attracted attention. It has partially solved the energy consumption problem and does not generate secondary pollution, so its applicability is expanding. However, since high-temperature thermal energy is used, attempts are being made to maximize its usability while conserving energy and to complement operational problems that may occur due to high pressure. 【Summary of the Invention】 【Problems to be Solved by the Invention】 【0005】 One objective of one embodiment of the present invention is to provide an anaerobic digestion system for organic waste that can increase biogas production and shorten digestion time by linking a thermal hydrolysis device to the pretreatment for anaerobic digestion. 【0006】 Furthermore, one objective of one embodiment of the present invention is to provide a system that reduces the energy consumption of the system by reusing thermal energy within the system. [Means for solving the problem] 【0007】 According to one aspect of the present invention, an anaerobic digestion system for organic waste is provided, which is characterized by comprising a thermal hydrolysis apparatus that receives organic waste and performs thermal hydrolysis, a first storage tank that receives and stores the liquid components discharged from the thermal hydrolysis apparatus, an anaerobic digester that receives the liquid components from the first storage tank to generate biogas and digest organic matter, and a dewaterer that mechanically dewaters the digested sludge discharged from the anaerobic digester. 【0008】 According to one aspect of the present invention, the thermal hydrolysis apparatus includes a preheating tank into which organic waste is introduced and preheated; a plurality of thermal hydrolysis reactors to which the preheated organic waste from the preheating tank is applied and thermal hydrolysis is performed in a preset environment; a vacuum tank into which all of the products remaining after thermal hydrolysis of the products from each thermal hydrolysis reactor, excluding a portion of the gaseous component, are introduced, separating the gaseous component from the liquid component, and discharging the gaseous component to the preheating tank and the liquid component to the vacuum tank; a steam purification unit into which a portion of the gaseous component from the products thermal hydrolyzed in any one of the thermal hydrolysis reactors is introduced, separating the gaseous component from the liquid component, and discharging the gaseous component to the other thermal hydrolysis reactors and the liquid component to the vacuum tank; a heat exchanger into which the liquid component discharged from the vacuum tank is introduced, cooled to a preset temperature, and then supplied to a first storage tank; and a control unit that controls the operation of each component in the thermal hydrolysis apparatus. 【0009】 According to one aspect of the present invention, each thermal hydrolysis reactor thermally hydrolyzes organic waste through the same process and performs different operations with a time difference between them. 【0010】 According to one aspect of the present invention, the control unit is characterized in that, when the pressure due to the gaseous components in any one of the thermal hydrolysis reactors exceeds a preset reference value, it controls the discharge of a portion of the gaseous components to the steam purification tank. 【0011】 According to one aspect of the present invention, the preset environment is characterized by having a pressure of 1 to 23 bar and a temperature of 100 to 220°C. 【0012】 According to one aspect of the present invention, the thermal hydrolysis apparatus further includes an ejector that injects steam flowing in from the outside and gaseous components separated and discharged in the steam purification tank into one of the thermal hydrolysis reactors. 【0013】 According to one aspect of the present invention, the heat exchanger is characterized in that it reduces energy consumption by combining the heated cooling water generated by cooling the thermally hydrolyzed liquid component with the boiler that supplies steam to the thermal hydrolysis apparatus, or with the feedwater for the boiler that heats the anaerobic digester. 【0014】 According to one aspect of the present invention, the anaerobic digestion system for organic waste further includes a digestion desorbed liquid treatment device, characterized in that it allows the digestion desorbed liquid generated by the dewatering machine to flow in and removes nitrogen components contained in the desorbed liquid. 【0015】 According to one aspect of the present invention, the digestion detachment treatment apparatus is characterized by comprising: a partial nitrite reaction tank into which the digestion detachment is introduced and partial nitrite is performed; an AOB granule generation tank into which sludge with reduced settling properties present in the partial nitrite reaction tank is introduced and ammonium oxidizing bacteria (AOB) granules are produced; an intermediate storage tank into which the treated water from the partial nitrite reaction tank is introduced and stored, while solid matter is precipitated and removed from the treated water; and an Anammox reaction tank that receives the treated water from the intermediate storage tank and removes nitrogen components by an anaerobic ammonium oxidation (Anammox) reaction. 【0016】 According to one aspect of the present invention, the organic waste flowing into the thermal hydrolysis apparatus is characterized in that it is discharged from the lower wastewater treatment device. 【0017】 According to one aspect of the present invention, the lower wastewater treatment apparatus includes a primary sedimentation tank into which lower wastewater flows and generates sludge; a biological reaction tank that contains the supernatant water from the primary sedimentation tank and treats it biologically; a secondary sedimentation tank that settles the treated water discharged from the biological reaction tank to generate sludge and discharges the supernatant water; and a dewatering machine that dewaters the sludge discharged from the secondary sedimentation tank, wherein the organic waste flowing into the thermal hydrolysis apparatus is the sludge discharged from the secondary sedimentation tank and dewatered. 【0018】 According to one aspect of the present invention, the lower wastewater treatment device further includes a concentrator, the concentrator concentrated the sludge generated in the primary sedimentation tank and discharged it to the primary storage tank so that it could be used for subsequent anaerobic digestion. [Effects of the Invention] 【0019】 As described above, according to one aspect of the present invention, by solubilizing organic waste by thermal hydrolysis and then treating it in an anaerobic digester, it is possible to reduce the amount of biogas generated and the digestion time in the anaerobic digester. 【0020】 According to one aspect of the present invention, there is an advantage that the thermal energy generated in the thermal hydrolysis device can be reused in the anaerobic digestion system of organic waste to which the thermal hydrolysis device is coupled, thereby improving the energy consumption efficiency of the system. 【0021】 Also, according to one aspect of the present invention, by treating the digestion desorbed liquid generated in the anaerobic digester through a process in which partial nitritation and anaerobic ammonium oxidation are combined, there is an advantage that the nitrogen load of the return water linked to the lower wastewater treatment device can be reduced and the desorbed liquid treatment cost can be saved. 【Brief Description of the Drawings】 【0022】 [Figure 1] It is a diagram showing a process diagram of an anaerobic digestion system of organic waste to which a thermal hydrolysis device according to an embodiment of the present invention is coupled. [Figure 2A] It is a diagram showing the configuration of a lower wastewater treatment device linked to an anaerobic digestion system of organic waste to which a thermal hydrolysis device according to an embodiment of the present invention is coupled. [Figure 2B] It is a diagram showing the configuration of a lower wastewater treatment device linked to an anaerobic digestion system of organic waste to which a thermal hydrolysis device according to an embodiment of the present invention is coupled. [Figure 3] It is a diagram showing the configuration of a thermal hydrolysis device according to an embodiment of the present invention. [Figure 4] It is a diagram showing the operation sequence of a thermal hydrolysis reactor according to an embodiment of the present invention. [Figure 5] It is a diagram showing the operation sequence of each thermal hydrolysis reactor according to an embodiment of the present invention. [Figure 6] It is a diagram showing the operation sequence of a thermal hydrolysis device according to an embodiment of the present invention. [Figure 7] It is a diagram showing the operation sequence of a thermal hydrolysis device according to an embodiment of the present invention. [Figure 8] It is a diagram showing the operation sequence of a thermal hydrolysis device according to an embodiment of the present invention. [Figure 9] It is a diagram showing the operation sequence of a thermal hydrolysis device according to an embodiment of the present invention. [Figure 10] This figure shows the operating sequence of a thermal hydrolysis apparatus according to one embodiment of the present invention. [Figure 11] This figure shows the operating sequence of a thermal hydrolysis apparatus according to one embodiment of the present invention. [Figure 12] This figure shows the configuration of a thermal hydrolysis apparatus according to another embodiment of the present invention. [Figure 13] This figure shows the configuration of a digestion and desorption liquid processing device according to one embodiment of the present invention. [Modes for carrying out the invention] 【0023】 While the present invention can be modified in various ways and have many embodiments, specific embodiments are illustrated and described in detail in the drawings. However, it should be understood that this does not intend to limit the present invention to specific embodiments, but rather includes all modifications, equivalents, or substitutions that fall within the spirit and technical scope of the invention. Similar reference numerals have been used for similar components in the illustration of each drawing. 【0024】 Terms such as First, Second, A, B, etc., can be used to describe a variety of components, but the components should not be limited by such terms. The terms are used solely for the purpose of distinguishing one component from another. For example, the First component may be named the Second component, and similarly, the Second component may be named the First component, without departing from the scope of the invention. The terms and / or include combinations of multiple related descriptions or any one of multiple related descriptions. 【0025】 When it is mentioned that one component is “linked” or “connected” to another component, it must be understood that it is directly linked to the other component, or may be connected, but other components may exist in between. Conversely, when it is mentioned that one component is “directly linked” or “directly connected” to another component, it must be understood that there are no other components in between. 【0026】 The terms used in this application are used solely to describe specific embodiments and are not intended to limit the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. It should be understood that in this application, terms such as “includes” or “having” do not preemptively exclude the possibility of the presence or addition of features, figures, stages, actions, components, parts, or combinations thereof as described in the specification. 【0027】 Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as those generally understood by a person of ordinary skill in the art to which this invention pertains. 【0028】 Terms as defined in commonly used dictionaries should be interpreted to have meanings consistent with their meanings in the context of the relevant technology, and not in an ideal or overly formal sense unless explicitly defined in this application. 【0029】 Furthermore, the various configurations, processes, steps, or methods included in each embodiment of the present invention can be shared to the extent that they are not technically contradictory. 【0030】 Figure 1 shows an anaerobic digestion system for organic waste combined with a thermal hydrolysis apparatus according to one embodiment of the present invention. As shown in Figure 1, an anaerobic digestion system 100 for organic waste (hereinafter referred to as "system 100"), which is combined with a thermal hydrolysis apparatus according to one embodiment of the present invention, includes a lower wastewater treatment apparatus 110, a cake storage tank 120, a thermal hydrolysis apparatus 130, a first storage tank 140, an anaerobic digester 150, a second storage tank 160, a digested sludge dewatering machine 170, and a digested sludge treatment apparatus 180. 【0031】 The wastewater treatment device 110 receives wastewater from the outside, removes pollutants such as solid matter and organic matter, and discharges the treated water to the outside. The pollutants removed by the wastewater treatment device 110 are discharged in the form of organic waste such as primary sludge (raw sludge), secondary sludge (excess sludge), and tertiary sludge (total phosphorus sludge). 【0032】 The lower wastewater treatment device 110 discharges the primary sludge (after passing through the concentrator 215, which will be described later, as shown in Figure 2) into the first storage tank 140 in the form of concentrated sludge, and the secondary and tertiary sludge (after dewatering using the dewaterer 235, which will be described later) into the cake storage tank 120. Furthermore, the lower wastewater treatment device 110 processes the concentrated / dewatered filtrate discharged during the sludge concentration and dewatering process, and further discharges the sludge. The lower wastewater treatment device 110 discharges the sludge generated by the treatment of the filtrate to the second storage tank 160. 【0033】 The lower wastewater treatment device 110 may be a water treatment facility of a sewage or wastewater treatment plant. The specific configuration of the lower wastewater treatment device 110 will be described later in Figure 2. The cake storage tank 120 receives the organic waste, from which secondary and tertiary sludge has been dewatered, from the lower wastewater treatment device 110 and temporarily stores it until it is transported to the thermal hydrolysis device 130. The thermal hydrolysis unit 130 receives organic waste stored in the cake storage tank 120, thermally hydrolyzes the organic waste, and discharges the liquid product into the first storage tank 140. The thermal hydrolysis unit 130 hydrolyzes the organic waste under preset temperatures and pressures to further improve the digestion efficiency of the organic waste in the anaerobic digester 150. 【0034】 The specific configuration and operating sequence of the thermal hydrolysis apparatus 130 will be described later with reference to Figures 3 to 12. The first storage tank 140 receives the thermal hydrolysis reaction product treated in the thermal hydrolysis unit 130 and the concentrated sludge discharged from the lower wastewater treatment unit 110, and stores them until they are introduced into the anaerobic digester 150. The concentrated sludge discharged from the lower wastewater treatment unit 110 is organic waste that the lower wastewater treatment unit 110 concentrates from primary sludge (raw sludge) using the concentrater 215. Such concentrated sludge is relatively more easily decomposed than secondary sludge and tertiary sludge (sludge generated in the secondary sedimentation tank 230 and tertiary treatment tank 240, described later), and can therefore be used immediately for anaerobic digestion without further solubilization treatment. 【0035】 The anaerobic digester 150 receives organic waste, which is a mixture of liquid products from the thermal hydrolysis reaction from the first storage tank 140 and concentrated sludge from the lower wastewater treatment device 110, and digests it to reduce and stabilize the organic waste, producing gaseous products (biogas) and digested sludge. The anaerobic digester 150 generates biogas from organic waste through the action of anaerobic microorganisms, decomposing organic matter. The biogas generated in the anaerobic digester 150 is used to produce electricity or reused as thermal energy after passing through a biogas purification facility. The digested sludge generated in the anaerobic digester 150 is discharged into the second storage tank 160. 【0036】 The second storage tank 160 receives digested sludge generated in the anaerobic digester 150 and temporarily stores it for post-treatment. The second storage tank 160 can also receive other sludge generated in the lower wastewater treatment device 110 and store it together with the digested sludge until it is separated into solid and liquid form in the digested sludge dewaterer 170. Other sludge flowing into the second storage tank 160, besides the digested sludge, includes excess sludge discharged after the sludge post-treatment process in the digested sludge treatment device 180, and sludge discharged from the filtrate treatment device 250, which will be described later with reference to Figure 2. 【0037】 The digested sludge dewatering machine 170 receives the sludge collected in the second storage tank 160, separates the solid and liquid, and discharges the dewatered cake for final disposal, while the digested sludge is discharged to the digested sludge treatment device 180. The digested sludge dewatering machine 170 may be a centrifugal dewatering machine, and the cake dewatered by the dewatering machine 170 will have a moisture content of about 75%. Depending on the final disposal method, such dewatered cake may be used for fuel after drying, or it may be transported off-site and processed by a third party. 【0038】 The digestion sludge treatment device 180 receives the sludge discharged from the digestion sludge dewatering machine 170 and removes nitrogen components from the sludge. The thermal hydrolysis unit 130, located upstream of the digestion and desorption liquid treatment device 180, generates high concentrations of organic nitrogen in the process of improving the biodegradation rate of organic waste. The anaerobic digester 150 then converts this organic nitrogen into ammonia nitrogen. 【0039】 For this reason, the sludge extracted from the digestion tank 150 still contains a high concentration of nitrogen, and if the sludge is treated in conjunction with the lower wastewater treatment device 110, it may affect the quality of the treated water in the lower wastewater treatment device 110. Therefore, the digestion sludge treatment device 180 removes the nitrogen from the sludge and returns the treated water to the lower wastewater treatment device 110. 【0040】 Furthermore, the digestion sludge treatment device 180 discharges excess sludge during the nitrogen treatment of the sludge, but the excess sludge is recovered again in the second storage tank 160 and reprocessed in the digestion sludge dewatering machine 170. The specific configuration of the digestion sludge treatment device 180 will be described later in Figure 13. The anaerobic digestion system 100 for organic waste, which is combined with a thermal hydrolysis device, pre-treats the organic waste with thermal hydrolysis before anaerobic digestion, thereby increasing the organic matter decomposition rate in the anaerobic digester 150 compared to when anaerobic digestion is performed alone. 【0041】 In other words, the thermal hydrolysis device 130 breaks down the bonding rings of high-molecular-weight organic substances and converts them into low-molecular-weight organic substances, thereby improving the biodegradation rate of organic substances. As a result, the anaerobic digester 150 can digest the organic waste rapidly and efficiently, regardless of the properties of the organic waste flowing into it. Furthermore, System 100 can reduce the residence time of the anaerobic digester 150 by more than 30% compared to a typical anaerobic digestion system. In addition, the biogas output of System 100 can be increased by more than 20-40% compared to a typical anaerobic digestion system (without pretreatment). 【0042】 Furthermore, the system 100 further includes a digestion desorbed liquid treatment device 180, which treats the desorbed liquid containing high concentrations of nitrogen components generated after passing through the thermal hydrolysis device 130 and the anaerobic digester 150, thereby minimizing the impact of the desorbed liquid on the treated water quality of the downstream wastewater treatment device 110, to which the return water is connected. Figure 2 shows the configuration of a wastewater treatment device 110 linked to an anaerobic digestion system for organic waste, which is combined with a thermal hydrolysis device according to one embodiment of the present invention. 【0043】 Referring to Figure 2A, the lower wastewater treatment device 110 according to one embodiment of the present invention includes a primary sedimentation tank 210, a concentrator 215, a biological reaction tank 220a, a secondary sedimentation tank 230, a dewatering machine 235, a tertiary treatment tank 240, and a filtrate treatment device 250. The primary sedimentation tank 210 receives wastewater and allows gravity to settle and concentrate the solids in the wastewater. The primary sedimentation tank 210 separates the supernatant water from the primary sludge (raw sludge), discharging the supernatant water to the biological reaction tank 220a and the primary sludge to the concentrator 215. The primary sludge (raw sludge) generated in the primary sedimentation tank 210 is relatively more easily decomposable than the secondary and tertiary sludge (excess sludge and total phosphorus sludge), and can therefore be immediately applied to anaerobic digestion without pretreatment such as thermal hydrolysis. Therefore, mixing the primary sludge with the secondary and tertiary sludge and processing it in the thermal hydrolysis unit 130 may result in an unnecessary increase in the processing capacity of the thermal hydrolysis unit 130. For this reason, the primary sludge is discharged to the concentrator 215 and immediately undergoes anaerobic digestion in the anaerobic digester 150 after passing through the concentrator 215. 【0044】 The concentrator 215 receives primary sludge from the primary sedimentation tank 210 and mechanically concentrates it to produce concentrated sludge and concentrated filtrate. The concentrator 215 discharges the concentrated sludge to the first storage tank 140 and the concentrated filtrate to the filtrate treatment device 250. The concentrated sludge obtained by the concentrator 215 has a total solids concentration (TS) of approximately 4-5%. This concentrated sludge is discharged to the first storage tank 140, where it is mixed with the thermal hydrolysis reaction product discharged from the thermal hydrolysis unit 130 and digested in the anaerobic digester 150. 【0045】 The biological reaction tank 220a contains microorganisms and receives the supernatant water from the primary sedimentation tank 210 to remove organic matter, nitrogen, phosphorus, etc. from the wastewater before discharging the treated water to the secondary sedimentation tank 230. The secondary sedimentation tank 230 receives treated water from the biological reaction tank 220a to settle and concentrate solid matter. The secondary sedimentation tank 230 separates the secondary sludge (excess sludge) from the supernatant water, discharging the supernatant water to the tertiary treatment tank 240 and the secondary sludge to the dewatering machine 235. 【0046】 The dewatering unit 235 receives the secondary sludge discharged from the secondary sedimentation tank 230. The dewatering unit 235 removes the water from the secondary sludge, separating it into a dewatered cake and a detached liquid. The cake is discharged to the cake storage tank 120, and the detached liquid is discharged to the filtrate treatment device 250. The dewatering machine 235 is a mechanical dewatering machine, and may be a centrifugal dewatering machine, for example. The organic waste (sludge) dewatered in the dewatering machine 235 has a moisture content of approximately 80%. The organic waste dewatered in the dewatering machine 235 is supplied to the thermal hydrolysis unit 130 and solubilized (thermal hydrolysis). 【0047】 The tertiary treatment tank 240 receives the supernatant water from the secondary sedimentation tank 230, performs post-treatment to remove any remaining pollutants that were not removed in the preceding stages (primary sedimentation tank, biological reaction tank, and secondary sedimentation tank), and then discharges the treated water. Post-treatment in the tertiary treatment tank 240 can be applied as needed, including total phosphorus treatment. Sludge generated during the total phosphorus treatment process is discharged to the dewatering machine 235 and dewatered together with the secondary sludge. 【0048】 The filtrate treatment device 250 receives the concentrated filtrate discharged from the concentrator 215 and the dewatered filtrate discharged from the dewatering device 235, and performs post-treatment such as removal of solid matter. The filtrate treatment device 250 returns the treated water to the upstream of the primary sedimentation tank 210, and the removed solid matter is discharged to the second storage tank. The filtrate treatment apparatus 250 may be a flotation separator (not shown), and may further include, if necessary, a storage tank (not shown) for temporarily storing the concentrated filtrate and the dehydrated filtrate. 【0049】 A flotation separator (not shown) receives the filtrate, removes particulate matter contained in the filtrate, and returns the treated water to the upstream stage of the primary sedimentation tank 210. The removed particulate matter is discharged in the form of sludge to the second storage tank 160, where it is mixed with digested sludge and dewatered downstream. 【0050】 Figure 2B shows a lower wastewater treatment device 110 according to another embodiment of the present invention. Referring to Figure 2B, the lower wastewater treatment device 110 may include only the biological reaction tank 220b, the dewatering machine 235, the tertiary treatment tank 240, and the filtrate treatment device 250. 【0051】 At this stage, the biological reactor 220b can remove solid matter, organic matter, nitrogen, phosphorus, etc. from the wastewater using a biological treatment method without the need for a preceding sedimentation treatment. The biological reactor 220b separates the wastewater into treated water and excess sludge, discharging the treated water to the tertiary treatment tank 240 and the excess sludge to the dewatering machine 235. 【0052】 For example, if the biological reactor 220b is a Sequencing Batch Reactor (SBR) or a Membrane Bioreactor (MBR), the biological reactor 220b does not need to include a sedimentation tank before or after it. In this case, excess sludge is generated in the biological reactor 220b and discharged to the dewatering unit 235. 【0053】 Figure 3 shows the configuration of a thermal hydrolysis apparatus 130 according to one embodiment of the present invention. Referring to Figure 3, a thermal hydrolysis apparatus 130 according to one embodiment of the present invention includes a preheating tank 310, a transfer pump 315, a plurality of thermal hydrolysis reactors 320, a reduced pressure tank 330, a steam purification tank 340, a heat exchanger 350, and a control unit (not shown). 【0054】 The preheating tank 310 is preheated by receiving the organic waste to be processed from the cake storage tank 120. The thermal hydrolysis reactor 320, described later, hydrolyzes the organic waste under relatively high temperature and high pressure conditions. Therefore, a relatively large amount of thermal energy must be consumed, but to prevent this, the preheating tank 310 is placed before the thermal hydrolysis reactor 320 in the processing stage to preheat the organic waste to be hydrolyzed. 【0055】 The preheating tank 310 does not receive thermal energy (mainly in the form of steam) from another heat source, but rather receives gaseous components separated in the vacuum tank 330, which will be described later. The gaseous components separated in the vacuum tank 330 have a constant temperature. Rather than being discharged (vented) to the outside, the gaseous components separated in the vacuum tank 330 are returned to the preheating tank 310 and used for preheating. As a result, the preheating tank 310 can preheat the incoming organic waste using the gaseous components separated in the vacuum tank 330 without needing to receive thermal energy from another heat source, thereby minimizing energy consumption. 【0056】 The transfer pump 315 transports the organic waste stored in the cake storage tank 120 to the preheating tank 310. The transfer pump 315 is controlled by a control unit (not shown) in conjunction with the operating sequence of the thermal hydrolysis apparatus 130 in order to transport a constant amount of organic waste from the cake storage tank 120 to the preheating tank 310. 【0057】 The thermal hydrolysis reactor 320 is subjected to thermal hydrolysis when preheated organic waste is added from the preheating tank 310. By thermally hydrolyzing the organic waste, the thermal hydrolysis reactor 320 increases the rate of organic matter decomposition using methane-producing bacteria in the subsequent anaerobic digester 150. 【0058】 The thermal hydrolysis reactor 320 operates as shown in Figure 4. Figure 4 shows the operation sequence of a thermal hydrolysis reactor 320 according to one embodiment of the present invention. Referring to Figure 4, first, preheated organic waste is introduced into the thermal hydrolysis reactor 320. Once the organic waste is introduced, a pre-set environment must be created in the thermal hydrolysis reactor 320 so that the thermal hydrolysis reaction can occur. The pre-set environment may be a pressure of 1 to 23 bar, more specifically around 5 to 20 bar, and a temperature of 100 to 220°C, more specifically 160 to 200°C to improve the decomposition of the organic waste. At this time, thermal energy (steam) is applied from an external heat source so that the thermal hydrolysis reactor 320 can maintain the pre-set temperature environment. Once the pre-set environment is established, in particular, when sufficient heating occurs and the temperature conditions are met, the thermal hydrolysis reaction occurs in the thermal hydrolysis reactor 320. The thermal hydrolysis reaction proceeds for a pre-set time (for example, several tens of minutes), and after the reaction is complete, some of the gaseous components of the product are discharged into the steam purification tank 340, and all the remaining components are discharged into the reduced pressure tank 330. The thermal hydrolysis reactor 320 operates in this manner to thermally hydrolyze organic waste. 【0059】 Referring again to Figure 3, the thermal hydrolysis reactor 320 may be implemented as a group of units. After the thermal hydrolysis reaction is completed in any one of the thermal hydrolysis reactors 320, some of the gaseous components of the product are discharged into the steam purification tank 340. As mentioned above, the gaseous components separated in the vacuum tank 330 flow into the preheating tank 310, while the steam purification tank 340, described later, separates any liquid components that may be contained in the gaseous components (steam), similar to the vacuum tank 330. The gaseous components separated in the steam purification tank 340 flow into the other thermal hydrolysis reactors 320 to assist in the temperature composition for thermal hydrolysis. This is possible because the multiple thermal hydrolysis reactors 320a to 320d operate as shown in Figure 5. 【0060】 Figure 5 shows the operating sequence of each thermal hydrolysis reactor according to one embodiment of the present invention. Each of the thermal hydrolysis reactors 320a to 320d operates as described with reference to Figure 4, with a time difference between them. For example, as shown in Figure 5, when thermal hydrolysis reactor 320a enters the process of heating up by introducing organic waste from the preheating tank 310, thermal hydrolysis reactor 320b can finally begin introducing organic waste from the preheating tank 310. Thermal hydrolysis reactor 320c can begin introducing organic waste from the preheating tank 310 when thermal hydrolysis reactor 320a begins thermal hydrolysis of the organic waste, and thermal hydrolysis reactor 320d can begin introducing organic waste from the preheating tank 310 when it is discharging the completed product to the outside. When operating in this manner, as described above, the purified gaseous component (steam) discharged from any one of the thermal hydrolysis reactors 320 can flow into the other thermal hydrolysis reactor that is heating up, thereby reducing the amount of thermal energy consumed for heating. 【0061】 Referring again to Figure 3, the thermal hydrolysis reactor 320 can thus obtain a portion of the heat required for the thermal hydrolysis reaction from the gaseous components produced in the other thermal hydrolysis reactors 320, minimizing wasted energy and reducing energy consumption for heating. 【0062】 The thermal hydrolysis reactor 320 includes a pressure sensor and, under the control of a control unit (not shown), separates and discharges a portion of the gaseous components of the products from the thermal hydrolysis reaction to the steam purification tank 340. The thermal hydrolysis reactor 320 senses the pressure inside the reactor and separates the gaseous components in the vacuum tank 330, which are then returned to the preheating tank 310. As a result, all remaining gaseous components, except for the amount sufficient to preheat the preheating tank 310, are separated and discharged to the steam purification tank 340. By performing pressure sensing, the thermal hydrolysis reactor 320 accurately discharges only the amount necessary for preheating to the steam purification tank 340, enabling the heating of other thermal hydrolysis reactors. Conventionally, the entire amount was discharged to the vacuum tank 330, and even if all the gaseous components were returned to the preheating tank and used for preheating, more than the amount necessary for preheating was returned, so all remaining gaseous components used for preheating were discharged and discarded. 【0063】 Alternatively, the thermal hydrolysis reactor 320 senses the internal pressure to detect whether there is an abnormally excessive amount of gaseous components in the reactor or whether an excessive amount of steam is being introduced from the outside. If the pressure due to the gaseous components in the reactor exceeds a preset standard value, the thermal hydrolysis reactor 320, under the control of a control unit (not shown), discharges all the gaseous components into the steam purification tank 340 until the pressure falls below the standard value. By discharging a certain amount of gaseous components into the steam purification tank 340, the thermal hydrolysis reactor 320 prevents the risk of explosion and recovers heat that can be used to heat other thermal hydrolysis reactors. 【0064】 The reduced pressure tank 330 receives most of the products generated after the thermal hydrolysis reaction is completed in the thermal hydrolysis reactor 320, separating the gaseous and liquid components. Of the products generated by the thermal hydrolysis reaction, only the liquid components are subject to anaerobic digestion, while the gaseous components are unrelated to anaerobic digestion. Therefore, the reduced pressure tank 330 separates the gaseous and liquid components from the products so that these components can be separated and used for preheating. The reduced pressure tank 330 has a relatively lower pressure than the thermal hydrolysis reactor 320. The reduced pressure lowers the temperature of the products, so that components with boiling points lower than the temperature in the reduced pressure tank remain in a gaseous state, and components with boiling points higher than the temperature in the reduced pressure tank liquefy into liquid components. In this way, the reduced pressure tank 330 creates a pressure difference with the thermal hydrolysis reactor 320, making certain components liquid and the remaining components gaseous. The reduced pressure tank 330 returns the separated gaseous components to the preheating tank 310, while the liquid components are discharged to the first storage tank 140 via the heat exchanger 350 for post-treatment. 【0065】 The steam purification tank 340 purifies the liquid component by allowing a portion of the gaseous component discharged from the thermal hydrolysis reactor 320 to flow into it. Because the thermal hydrolysis reactor 320 is under relatively high pressure, even if only the gaseous component is discharged from the reactor 320, liquid components may be generated afterward, or liquid components may be discharged together with the gaseous component at high pressure. For this reason, the steam purification tank 340 separates the gaseous and liquid components, discharging the liquid component to the reduced pressure tank 330 and the gaseous component to another thermal hydrolysis reactor into which preheated organic waste flows. The reason why the steam purification tank 340 separates the gaseous and liquid components from the product is as follows. 【0066】 The liquid component of the product generated in the thermal hydrolysis reactor 320 corresponds to the component that has already undergone thermal hydrolysis. If such liquid component is put back into the thermal hydrolysis reactor and undergoes thermal hydrolysis again, it is inefficient and represents a waste of energy. Furthermore, when organic waste is introduced from the preheating tank 310 to a specific thermal hydrolysis reactor 320, an appropriate amount is introduced to ensure that the thermal hydrolysis reaction proceeds smoothly in the thermal hydrolysis reactor 320. At this time, if the liquid component of the product generated in another thermal hydrolysis reactor flows into the thermal hydrolysis reactor, more than the appropriate amount will flow into that reactor. This causes an inefficient thermal hydrolysis reaction and leads to the consumption of more thermal energy than necessary. To prevent such problems, the steam purification tank 340 separates the liquid and gaseous components in the product discharged from the thermal hydrolysis reactor 320 and transports each to different configurations. 【0067】 The steam purification tank 340 can be implemented in any form or structure as long as it can separate the gaseous and liquid components. The heat exchanger 350 lowers the temperature of the liquid components discharged from the reduced pressure tank 330, adjusting the temperature of the anaerobic digester 150 applied downstream to a preset operating temperature. The heat exchanger 350 lowers the temperature of the liquid component by circulating cooling water and exchanging heat with the high-temperature liquid component. Since the temperature of the liquid component discharged from the reduced pressure tank 330 is at approximately 100°C, the heat exchanger 350 lowers the temperature of the liquid component to the appropriate temperature range of the anaerobic digester 150, for example, around 40°C, before supplying the liquid component to the first storage tank 140. 【0068】 On the other hand, the cooling water, which has been heated by heat exchange with the high-temperature liquid components, can be recovered as an external heat source (boiler) to supply thermal energy (steam) to the thermal hydrolysis reactor 320. In other words, by combining the heated cooling water with the water for the steam generation boiler, the energy consumed for steam generation is reduced. 【0069】 Furthermore, the heated cooling water discharged from the heat exchanger 350 may be combined with the feedwater for the boiler (not shown) used to heat the anaerobic digester 150. In this case, the energy consumption required to heat the anaerobic digester 150 is reduced. Similarly, the heated cooling water may be recirculated as heat exchange water to maintain the preset operating temperature of the Anammox reaction tank 1350, which will be described later. 【0070】 Thus, the thermal energy generated in the thermal hydrolysis apparatus 130 can be recovered within the system 100 using various methods. Therefore, by reusing all the thermal energy generated in the thermal hydrolysis apparatus 130, the energy consumption efficiency of the system 100 is improved. 【0071】 The control unit (not shown) controls the operation of each component within the thermal hydrolysis apparatus 130. A control unit (not shown) controls the transport pump 315 so that organic waste to be processed flows into the preheating tank 310. For this purpose, the preheating tank 310 may include a water level gauge, and the control unit (not shown) controls the system to introduce waste from the cake storage tank 120 into the preheating tank 310 if the water level in the preheating tank 310 is below a preset level, and to interrupt the introduction of waste if the water level is above the preset level. 【0072】 A control unit (not shown) can control the vacuum tank 330 to return the gaseous components separated in the vacuum tank 330 to the preheating tank 310 in order to preheat the organic waste. A control unit (not shown) controls the transport of organic waste preheated in the preheating tank 310 to a thermal hydrolysis reactor (e.g., 320a). After transport, the control unit (not shown) introduces steam from an external heat source and gaseous components (steam) separated from the product in another thermal hydrolysis reactor (e.g., 320c) into the thermal hydrolysis reactor 320a so that a thermal hydrolysis reaction can occur in the thermal hydrolysis reactor 320a. This causes a thermal hydrolysis reaction to occur in the thermal hydrolysis reactor 320a. 【0073】 At this time, the control unit (not shown) determines whether the pressure inside the thermal hydrolysis reactor 320a is below a preset reference value. If the pressure inside the thermal hydrolysis reactor 320a is below the preset reference value, it corresponds to a situation where the thermal hydrolysis reaction is proceeding without any abnormalities. On the other hand, if the pressure inside the thermal hydrolysis reactor 320a exceeds the preset reference value, it corresponds to a situation where there is an abnormally large amount of gaseous components, or where excessive steam is introduced from the outside, potentially causing abnormalities in the reactor 320. In this case, the control unit (not shown) discharges the gaseous components into the steam purification tank 340 until the pressure falls below the preset reference value. In this way, the control unit (not shown) resolves the abnormality inside the thermal hydrolysis reactor 320a. 【0074】 When the thermal hydrolysis reaction proceeds for a predetermined time in the thermal hydrolysis reactor 320a, the control unit (not shown) discharges a portion of the gaseous components to the steam purification tank 340 and all of the remaining products to the vacuum tank 330. At this time, when discharging the gaseous components, the control unit (not shown) discharges all but the amount separated in the vacuum tank 330 and sufficient to preheat the organic waste in the preheating tank 310 to the steam purification tank 340. In this way, the remaining gaseous components, other than those necessary for preheating, are not discharged to the outside and can all be used to heat other thermal hydrolysis reactors, thereby maximizing energy efficiency. 【0075】 The control unit (not shown) controls the reduced pressure tank 330 to separate the gaseous and liquid components, and controls the discharge of the gaseous component to the preheating tank 310 and the liquid component to the heat exchanger 350 for anaerobic digestion. Simultaneously, the remaining thermal hydrolysis reactors 320b to 320d are controlled in parallel to operate in a specific order. The process by which the control unit (not shown) controls the operation of each thermal hydrolysis reactor will be described later with reference to Figures 6 to 11. 【0076】 By controlling each component in this manner, the control unit (not shown) can minimize the thermal energy applied from an external heat source by recycling the thermal energy source to the maximum extent possible without wasting any thermal energy. 【0077】 Figures 6-11 show the operation sequence of an organic waste treatment device according to one embodiment of the present invention. Figures 6-11 show in detail the process by which the thermal hydrolysis device 130 receives and treats organic waste. 【0078】 Referring to Figure 6, the control unit (not shown) controls the flow of organic waste into the preheating tank 310 (first) for preheating. 【0079】 Referring to Figure 7, the preheated organic waste flows into one thermal hydrolysis reactor 320a, where it receives thermal energy (in the form of steam) from an external heat source (first) and its temperature rises. 【0080】 Referring to Figure 8, if no special abnormality occurs in the thermal hydrolysis reactor 320a, the thermal hydrolysis reactor 320a is separated in the vacuum tank 330 by the control of the control unit (not shown), and the remaining gaseous components, in an amount not sufficient to preheat the organic waste in the preheating tank 310, are discharged to the steam purification tank 340, and all remaining products are discharged to the vacuum tank 330. If the internal pressure of the thermal hydrolysis reactor 320a exceeds a preset reference value, the thermal hydrolysis reactor 320a will discharge the gaseous components to the steam purification tank 340 and all remaining products to the vacuum tank 330 until the internal pressure falls below the preset reference value. 【0081】 Referring to Figure 9, the preheating tank 310 receives organic waste and is preheated by gaseous components returned from the reduced pressure tank 330, and the preheated organic waste flows into the thermal hydrolysis reactor 320c. 【0082】 Referring to Figure 10, the liquid components separated in the steam purification tank 340 flow into the reduced pressure tank 330, and the gaseous components flow into the thermal hydrolysis reactor 320c. Simultaneously, thermal energy (in the form of steam) is applied from an external heat source, causing the thermal hydrolysis reactor 320c to heat up. 【0083】 At this time, when gaseous components and thermal energy are applied to the thermal hydrolysis reactor 320c, the gaseous components are preferentially applied entirely, followed by the application of energy from an external heat source. The external heat source that applies thermal energy to the thermal hydrolysis reactor has a relatively very high pressure. On the other hand, the steam purification tank 340 has a relatively very low pressure. As a result, when both are applied to the thermal hydrolysis reactor 320c simultaneously, a problem arises in which the gaseous components from the steam purification tank 340 cannot be completely applied to the thermal hydrolysis reactor 320c due to the pressure difference. Moreover, a problem may occur in which the thermal energy (steam) applied to the thermal hydrolysis reactor 320c from the outside is instead discharged into the steam purification tank 340. To prevent this, the gaseous components are preferentially applied to the thermal hydrolysis reactor 320c from the steam purification tank 340, and then thermal energy (steam) from the external heat source is applied to the thermal hydrolysis reactor 320c. This ensures that all components are completely applied to the thermal hydrolysis reactor. 【0084】 Referring to Figure 11, the depressurized tank 330, under the control of a control unit (not shown), transmits the separated liquid component to the heat exchanger 350 and returns the separated gaseous component to the preheating tank 310, providing the thermal energy necessary for preheating. As the gaseous components separated in the steam purification tank 340 flow into the thermal hydrolysis reactor 320c, the amount of thermal energy applied from the external heat source can be reduced by the amount of the gaseous components. In this way, the thermal hydrolysis reaction proceeds in the heated thermal hydrolysis reactor 320c, and the process shown in Figures 8-11 is repeated, making the treatment possible. 【0085】 Figure 12 shows a thermal hydrolysis apparatus according to another embodiment of the present invention. Referring to Figure 12, another embodiment of the present invention, the thermal hydrolysis apparatus 130, can further include an ejector 1210 in the configuration of the thermal hydrolysis apparatus 130 according to one embodiment of the present invention. The ejector 1210 is located on a thermal energy supply path that supplies thermal energy (in the form of steam) applied from the steam purification tank 340 and an external heat source to a specific thermal hydrolysis reactor 320 for heating the reactor. 【0086】 The ejector 1210 simultaneously injects the gaseous components separated in the steam purification tank 340 and the thermal energy applied from an external heat source into a specific thermal hydrolysis reactor 320, regardless of the pressure difference. As mentioned above, the external heat source has a relatively very high pressure. On the other hand, the steam purification tank 340 has a relatively very low pressure. As a result, when both are applied to the thermal hydrolysis reactor 320 simultaneously, the pressure difference may prevent the gaseous components from the steam purification tank 340 from being completely supplied to the thermal hydrolysis reactor 320, and may even cause the thermal energy supplied from the external heat source to be discharged into the steam purification tank 340. 【0087】 To prevent such problems, the ejector 1210 is positioned at the point where the path for applying thermal energy from an external heat source and the path for applying gaseous components from the steam purification tank 340 to the reactor 320 converge. 【0088】 The ejector 1210 applies steam and gaseous components supplied to each path, ensuring that each component is applied to the thermal hydrolysis reactor 320 regardless of the pressure difference. Furthermore, the ejector 1210 allows gaseous components discharged from the steam purification tank 340 together with the steam injected from an external heat source to be applied to the thermal hydrolysis reactor 320. Thus, the ejector 1210 not only prevents gaseous components from being discharged from the thermal hydrolysis reactor 320 into the steam purification tank 340, but can also improve the discharge rate of gaseous components from the steam purification tank 340. 【0089】 When the ejector 1210 is included, the operation of the thermal hydrolysis apparatus 130 in Figure 10 described above is as follows: The liquid components separated in the steam purification tank 340 flow into the reduced pressure tank 330, and the gaseous components flow into the thermal hydrolysis reactor 320c. Simultaneously, steam is applied from an external heat source, causing the thermal hydrolysis reactor 320c to heat up. 【0090】 Since the ejector 1210 is located at the confluence of the supply path for the external heat source and the supply path for the gaseous components of the steam purification tank 340, the gaseous components and the steam supplied from the outside can be injected into the thermal hydrolysis reactor 320c as soon as they are generated, regardless of the order. Furthermore, the ejector 1210 allows the gaseous components to be supplied to the thermal hydrolysis reactor 320c more rapidly, increasing the heating rate of the reactor. 【0091】 Figure 13 shows the configuration of a digestion and desorption liquid processing apparatus according to one embodiment of the present invention. Referring to Figure 13, the digestion and desorption treatment apparatus 180 includes a flow rate adjustment tank 1310, a partial nitrite reaction tank 1320, an AOB granule generation tank 1330, an intermediate storage tank 1340, and an anammox reaction tank 1350. 【0092】 The flow rate adjustment tank 1310 receives the digested sludge discharged from the digested sludge dewatering machine 170 and stores it until it is introduced into the partial nitrite reaction tank 1320. 【0093】 The partial nitrite reaction tank 1320 receives digestion eluate from the flow rate adjustment tank 1310 and uses ammonium oxidizing bacteria (AOB) granules (hereinafter abbreviated as "AOB granules") to oxidize a portion (about half) of the ammoniacal nitrogen contained in the eluate to nitrite nitrogen. The partial nitrite reaction tank 1320 receives AOB granules produced by the AOB granule generation tank 1330. The partial nitrite reaction tank 1320 uses the incoming AOB granules to oxidize a portion of the ammoniacal nitrogen in the supplied eluate to nitrite nitrogen. The partial nitrite reaction tank 1320 continues the partial nitrite reaction until the ratio of ammoniacal nitrogen to nitrite nitrogen becomes 1:1.32. In the partial nitrite reaction tank 1320, AOB becomes dominant and nitrification takes place. The partial nitrite reaction tank 1320 carries out the partial nitrite reaction, then precipitates the AOB granules. The treated water (supernatant) is discharged to the intermediate storage tank 1340, and any sludge with poor sedimentation properties is returned to the AOB granule generation tank 1330. By using AOB granules, the partial nitrite reaction tank 1320 can ensure improved treatment efficiency and shorten the precipitation time. 【0094】 The AOB granule generation tank 1330 receives poorly precipitated sludge from the partial nitrite reaction tank 1320, generates AOB granules, and supplies these granules back to the partial nitrite reaction tank 1320. By repeating this process, the partial nitrite reaction tank 1320 can maintain the granules and perform stable partial nitrification. The AOB granule generating tank 1330 may, but is not limited to, use an airlift type reactor (not shown) to effectively generate granules. 【0095】 The intermediate storage tank 1340 receives treated water from the partial nitrite reactor 1320 and temporarily stores it until it is supplied to the anammox reactor 1350. The intermediate storage tank 1340 stores treated water discharged from the partial nitrification reactor 1320 and supplies nitrified treated water in accordance with the flow of the subsequent continuous-flow anammox reactor 1350. 【0096】 Solid matter settles in the treated water stored in the intermediate storage tank 1340, forming sludge. The sludge formed in the intermediate storage tank 1340 is then recovered and transferred to the second storage tank 160. The Anammox reaction tank 1350 receives partially nitrified treated water from the intermediate storage tank 1340 to remove nitrogen, and then returns the treated water to the wastewater treatment device 110. 【0097】 The Anamox reactor 1350 houses anaerobic ammonium oxidizing bacteria (AnAOB), which use nitrite as an electron acceptor to convert ammonia in the treated water into nitrogen gas, thereby removing nitrogen. The related chemical formula is as follows: 1.0NH4 + +1.32NO2 - +0.066 HCO3 - +0.13H + →1.02N2+0.26NO3 - +0.066CH2O 0.5 N 0.15 +2.03H2O 【0098】 The Anammox reactor 1350 may be carried out in a fully mixed fluid-bed reactor (not shown), but is not limited thereto. 【0099】 The above description is merely an example illustrating the technical concept of this embodiment, and a person with ordinary skill in the art to which this embodiment belongs could make various modifications and variations without departing from the essential characteristics of this embodiment. Therefore, this embodiment is for illustrative purposes only, not to limit the technical concept of this embodiment, and the scope of the technical concept of this embodiment is not limited by such an embodiment. The scope of protection of this embodiment should be interpreted in accordance with the following claims, and all technical concepts within an equivalent scope should be interpreted as being included in the scope of rights of this embodiment. 【0100】 CROSS-REFERENCE TO RELATED APPLICATION *This patent application claims priority under Section 119(a) of the United States Patent Act (35 U.S.SC § 119(a)) to Patent Application No. 10-2022-0101216 filed in Korea on 12 August 2022, and all its contents are incorporated into this patent application as references. In addition, this patent application claims priority in countries other than the United States for the same reasons as above, and all its contents are incorporated into this patent application as references. <Note> The aspects of this disclosure include the following: <Section 1> A thermal hydrolysis apparatus that allows organic waste to flow in and undergoes thermal hydrolysis, A first storage tank into which the liquid component discharged from the thermal hydrolysis apparatus is introduced and stored, An anaerobic digester that allows the liquid components of the first storage tank to flow in and digest organic matter to produce biogas, A dewatering machine for mechanically dewatering the digested sludge discharged from the anaerobic digester, An anaerobic digestion system for organic waste, characterized by the inclusion of a thermal hydrolysis apparatus. <Section 2> The thermal hydrolysis apparatus is A preheating tank into which organic waste is introduced for preheating, Multiple thermal hydrolysis reactors to which preheated organic waste from the aforementioned preheating tank is applied and thermal hydrolysis is performed in a predetermined environment, A vacuum tank is used to separate the gaseous and liquid components of the product obtained by thermal hydrolysis in each thermal hydrolysis reactor, by introducing all of the product except for a portion of the gaseous component, and discharging the gaseous component to the preheating tank and the liquid component to the vacuum tank. A steam purification unit that introduces a portion of the gaseous component of the product obtained by thermal hydrolysis in one of the thermal hydrolysis reactors, separates the gaseous component from the liquid component, discharges the gaseous component to another thermal hydrolysis reactor and the liquid component to the vacuum tank, A heat exchanger that receives the liquid component discharged from the aforementioned depressurized tank, cools it to a preset temperature, and then supplies it to the first storage tank, An anaerobic digestion system for organic waste, comprising the thermal hydrolysis apparatus described in item 1, further comprising a control unit for controlling the operation of each component within the thermal hydrolysis apparatus. <Section 3> An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus as described in item 2, characterized in that each thermal hydrolysis reactor thermally hydrolyzes organic waste through the same process and performs different operations with a time difference between them. <Section 4> The control unit, An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus as described in item 3, characterized in that, if the pressure due to gaseous components in any one of the thermal hydrolysis reactors exceeds a preset standard value, the system is controlled to discharge a portion of the gaseous components into the steam purification tank. <Section 5> The aforementioned pre-configured environment is An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus according to item 4, characterized by having a pressure of 1 to 23 bar and a temperature of 100 to 220°C. <Section 6> An anaerobic digestion system for organic waste, comprising an ejector that further includes steam flowing in from the outside and gaseous components separated and discharged in the steam purification tank, into one of the thermal hydrolysis reactors, as described in item 2. <Section 7> The heat exchanger is, An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus as described in item 2, characterized in that the heated cooling water generated by cooling the thermally hydrolyzed liquid component is combined with a boiler that supplies steam to the thermal hydrolysis apparatus, or with feedwater for a boiler that heats the anaerobic digester, thereby reducing energy consumption. <Section 8> The anaerobic digestion system for the aforementioned organic waste is An anaerobic digestion system for organic waste, further comprising a digestion desorbent liquid processing device, characterized in that the digestion desorbent liquid generated by the dewatering machine is introduced into the thermal hydrolysis apparatus described in item 1 to remove nitrogen components contained in the desorbent liquid. <Section 9> The digestion and desorbed liquid processing apparatus is, A partial nitrite reaction vessel into which the digested nitrate is introduced to carry out partial nitrite formation, An AOB granule generation tank is used to generate ammonium oxidizing bacteria (AOB) granules by introducing sludge with reduced settling properties present in the partial nitrite reaction tank, An intermediate storage tank that receives and stores treated water from the partial nitrite reaction tank, while removing solid matter by sedimentation from the treated water, An anaerobic digestion system for organic waste, comprising an Anammox reaction tank that receives treated water from the intermediate storage tank and removes nitrogen components by an anaerobic ammonium oxidation (Anammox) reaction, wherein the thermal hydrolysis apparatus described in item 8 is combined with the above-mentioned system. <Section 10> An anaerobic digestion system for organic waste, comprising the thermal hydrolysis apparatus described in item 1, wherein the organic waste flowing into the thermal hydrolysis apparatus is discharged from the lower wastewater treatment apparatus. <Section 11> The aforementioned wastewater treatment device is A primary sedimentation tank into which wastewater flows and generates sludge, A biological reaction tank for receiving and biologically treating the supernatant water from the primary sedimentation tank, A secondary sedimentation tank is provided to allow the treated water discharged from the biological reaction tank to settle and generate sludge, and to discharge the supernatant water. The system includes a dewatering machine for dewatering the sludge discharged from the secondary sedimentation tank, An anaerobic digestion system for organic waste, comprising the thermal hydrolysis apparatus described in item 10, wherein the organic waste flowing into the thermal hydrolysis apparatus is dewatered sludge discharged from the secondary sedimentation tank. <Section 12> The aforementioned wastewater treatment device further includes a concentrator, An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus as described in item 11, characterized in that the concentrator concentrates the sludge generated in the primary sedimentation tank and discharges it to the primary storage tank so that it can be used for subsequent anaerobic digestion.

Claims

[Claim 1] A thermal hydrolysis apparatus that allows organic waste to flow in and undergoes thermal hydrolysis, A first storage tank into which the liquid component discharged from the thermal hydrolysis apparatus is introduced and stored, An anaerobic digester that allows the liquid components of the first storage tank to flow in and digest organic matter to produce biogas, A dewatering machine for mechanically dewatering the digested sludge discharged from the anaerobic digester, Includes, The thermal hydrolysis apparatus is A preheating tank into which organic waste is introduced for preheating, Multiple thermal hydrolysis reactors to which preheated organic waste from the aforementioned preheating tank is applied and thermal hydrolysis is performed in a predetermined environment, A vacuum tank is used to separate the gaseous and liquid components of the product obtained by thermal hydrolysis in each thermal hydrolysis reactor, by introducing all of the product except for a portion of the gaseous component, and discharging the gaseous component to the preheating tank and the liquid component to the vacuum tank. A steam purification unit that introduces a portion of the gaseous component of the product obtained by thermal hydrolysis in one of the thermal hydrolysis reactors, separates the gaseous component from the liquid component, discharges the gaseous component to another thermal hydrolysis reactor and the liquid component to the reduced pressure tank, A heat exchanger that receives the liquid component discharged from the aforementioned depressurized tank, cools it to a preset temperature, and then supplies it to the first storage tank, Includes a control unit that controls the operation of each component within the thermal hydrolysis apparatus. An anaerobic digestion system for organic waste, characterized by the combination of a thermal hydrolysis apparatus. [Claim 2] An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus according to claim 1, characterized in that each thermal hydrolysis reactor thermally hydrolyzes organic waste through the same process and performs different operations with a time difference between them. [Claim 3] The control unit, An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus according to claim 2, characterized in that, if the pressure due to gaseous components in any one of the thermal hydrolysis reactors exceeds a preset standard value, the system controls the discharge of a portion of the gaseous components to the steam purification section. [Claim 4] The aforementioned pre-configured environment is An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus according to claim 3, characterized by having a pressure of 1 to 23 bar and a temperature of 100 to 220°C. [Claim 5] An anaerobic digestion system for organic waste, further comprising an ejector that injects steam flowing in from the outside and gaseous components separated and discharged in the steam purification unit into one of the thermal hydrolysis reactors, as described in claim 1. [Claim 6] The heat exchanger is, An anaerobic digestion system for organic waste, comprising a thermal hydrolysis apparatus according to claim 1, characterized in that the heated cooling water generated by cooling the thermally hydrolyzed liquid component is combined with a boiler that supplies steam to the thermal hydrolysis apparatus, or with feedwater for a boiler that heats the anaerobic digester, thereby reducing energy consumption. [Claim 7] The anaerobic digestion system for the aforementioned organic waste is An anaerobic digestion system for organic waste, further comprising a digestion desorbent liquid processing device, characterized in that the digestion desorbent liquid generated by the dewatering machine is introduced into the thermal hydrolysis device according to claim 1 to remove nitrogen components contained in the desorbent liquid. [Claim 8] The digestion and desorbed liquid processing apparatus is, A partial nitrite reaction vessel into which the digested nitrate is introduced to carry out partial nitrite formation, An AOB granule production tank is used to generate ammonium oxidizing bacteria (AOB) granules by introducing sludge with reduced settling properties present in the partial nitrite reaction tank, An intermediate storage tank that receives and stores treated water from the partial nitrite reaction tank, while removing solid matter by sedimentation from the treated water, An anaerobic digestion system for organic waste, comprising an anamox reaction tank that receives treated water from the intermediate storage tank and removes nitrogen components by an anaerobic ammonium oxidation (anamox) reaction, as described in claim 7. [Claim 9] An anaerobic digestion system for organic waste, comprising the thermal hydrolysis apparatus described in claim 1, wherein the organic waste flowing into the thermal hydrolysis apparatus is discharged from the lower wastewater treatment apparatus. [Claim 10] The aforementioned wastewater treatment device is A primary sedimentation tank into which wastewater flows and generates sludge, A biological reaction tank for receiving and biologically treating the supernatant water from the primary sedimentation tank, A secondary sedimentation tank is provided to allow the treated water discharged from the biological reaction tank to settle and generate sludge, and to discharge the supernatant water. The system includes a dewatering machine for dewatering the sludge discharged from the secondary sedimentation tank, An anaerobic digestion system for organic waste, comprising the thermal hydrolysis apparatus described in claim 9, wherein the organic waste flowing into the thermal hydrolysis apparatus is dewatered sludge discharged from the secondary sedimentation tank. [Claim 11] The aforementioned wastewater treatment device further includes a concentrator, The anaerobic digestion system for organic waste, which is coupled with the thermal hydrolysis apparatus according to claim 10, is characterized in that the concentrator concentrates the sludge generated in the primary sedimentation tank and discharges it to the first storage tank so that it can be used for subsequent anaerobic digestion.

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