KR20200059567A - Apparatus and Method for Recovering Available Resources - Google Patents

Abstract

Disclosed are an effective resource recovery device and method. According to an aspect of the present embodiment, provided are an effective resource recovery device and method capable of efficiently recovering resources such as methane gas, nitrogen, and phosphorus while minimizing the use of chemicals. The effective resource recovery device includes an anaerobic digester, a solid-liquid separation tank, an ammonia degassing tank, a gas-liquid dissolving unit, a composition production unit, an ion reaction tank, and a recovery unit.

Description

Apparatus and Method for Recovering Available Resources}

The present invention relates to an apparatus and method for recovering effective resources contained in organic waste in organic waste.

The contents described in this section merely provide background information for this embodiment, and do not constitute a prior art.

Anaerobic digestion technology is a representative technology for reducing organic wastes such as livestock manure, food waste or sewage waste, and is applied to livestock manure public treatment facilities, food waste recycling facilities, or sewage treatment facilities. Anaerobic digestion technology can not only reduce organic waste, but also recover biogas with 60% methane content and 40% carbon dioxide as a by-product. Most of the digestive waste liquid generated through anaerobic digestion is transferred to a sewage treatment facility and is linked to it, but it contains high concentrations of nitrogen and phosphorus, which adds to the burden on the water treatment process.

In order to solve this problem, nitrogen and phosphorus are removed through purification treatment to partially relieve the burden of the water treatment process, but a lot of funds are required for the cost of construction and maintenance of the facility.

For example, phosphorus present in livestock manure is bound to organic matter or chemically to various ions. In order to recover phosphorus, conventionally, a method of recovering by eluting phosphorus bound with an organic substance and then precipitating it with struvite bound with magnesium and ammonia is used. However, a low pH has to be formed in order to elute the phosphorus bound to the organic matter and other ions. To form a low pH, a strong acid solution such as sulfuric acid or hydrochloric acid must be injected. However, because of the high alkalinity of livestock manure digestive waste liquid, a large amount of strong acid solution must be consumed, and thus, a large cost is consumed in the elution of phosphorus.

One embodiment of the present invention has an object to provide an effective resource recovery device and method for efficiently recovering resources such as high concentration methane gas, nitrogen and phosphorus while minimizing the use of chemicals.

According to an aspect of the present invention, in an apparatus for recovering resources contained in organic waste, an anaerobic digester performing anaerobic digestion on the organic waste to generate digestive waste liquid and gas and the digestive waste liquid as solid components and liquid components A solid-liquid separation tank to separate and a predetermined amount of air is injected into the liquid component separated from the solid-liquid separation tank to ammonia degassing tank to degas some ammonium ions, and the gas and the ammonia are introduced and mixed with dissolved water. , By providing a gas-liquid dissolving gas and a pre-set environment for dissolving a gas with high solubility in the dissolved water and discharging a gas with low solubility to the outside, the solid phase as a component dissolved in the dissolved water. The composition production unit for producing the composition and the liquid component that has passed through the ammonia degassing tank and the ion-binding material from the outside, the ion reaction tank for producing a solid phosphate compound, and the composition produced in the composition production unit and the ion reaction tank, respectively, and It provides an effective resource recovery device comprising a recovery unit for recovering a solid phosphate compound.

According to an aspect of the present invention, the ammonia degassing tank is characterized by degassing ammonia by increasing the deaeration efficiency of ammonia by injecting the predetermined amount of air to increase the pH.

According to one aspect of the invention, the gas is characterized in that it comprises a methane (CH4) gas and carbon dioxide.

According to an aspect of the present invention, the gas having low solubility in the dissolved water is characterized in that it is methane gas.

According to an aspect of the present invention, the effective resource recovery device is characterized in that it further comprises a gas storage tank for collecting and storing the methane gas discharged from the gas-liquid melter.

According to an aspect of the present invention, the composition production unit is characterized in that it produces ammonium bicarbonate using ammonia and carbon dioxide dissolved in the dissolved water.

According to an aspect of the present invention, the recovery unit is connected to both the composition production unit and the ion reaction tank to recover the solid composition and the solid phosphate compound at once, or to the composition production unit and the ion reaction tank, respectively. It characterized in that the composition and the phosphoric acid compound of the solid phase to be recovered separately.

According to an aspect of the present invention, in a method for recovering resources contained in organic waste, an anaerobic digestion process that generates anaerobic digestion liquid and gas by performing anaerobic digestion on the organic waste and the digestive waste liquid is a solid component and a liquid component. Ammonia degassing process in which a part of ammonium ions are degassed by injecting a predetermined amount of air into the solid-liquid separation process separating into the solid-liquid separation process and the liquid component separated in the solid-liquid separation process. By mixing, dissolving a gas with high solubility in the dissolved water, and in a gas-liquid dissolution process for discharging a gas with low solubility to the outside and in a predetermined environment, producing a composition with a component dissolved in the dissolved water The composition production process and the ammonia degassing process, the liquid component and the ion-binding material from the outside are introduced, and the ionic reaction process to produce a solid phosphate compound, the composition production process, and the solid composition produced in the ionic reaction process, respectively It provides a method for recovering effective resources, comprising a recovery process for recovering solid phosphate compounds.

According to one aspect of the invention, the gas is characterized in that it comprises methane and carbon dioxide.

According to an aspect of the present invention, the gas having low solubility in the dissolved water is characterized in that it is methane gas.

According to an aspect of the present invention, in an apparatus for recovering resources contained in organic waste, an anaerobic digester that performs anaerobic digestion to decompose the organic waste into digested waste liquid and gas and the digested waste liquid as a solid component and a liquid component The solid-liquid separation tank to be separated and the liquid component separated from the solid-liquid separation tank are injected with a predetermined amount of air, and ammonia degassing tank for degassing a part of ammonium ions with ammonia and the gas is mixed with dissolved water, Dissolves the gas having a relatively high solubility in the dissolved water among the gases contained in the gas, and provides a gas-liquid dissolving gas and a predetermined environment for discharging the gas having a relatively low solubility to the outside, and dissolving in the dissolved water In the ion production tank and the ion reaction tank for producing a solid phosphate compound by receiving an ion-bonding material from the external component and the composition production unit for producing a liquid composition with the ammonia and the ammonia degassing tank and the outside It provides an effective resource recovery device comprising a recovery unit for recovering the produced solid phosphate compound.

According to an aspect of the present invention, in a method for recovering resources contained in organic waste, an anaerobic digestion process for performing anaerobic digestion to decompose the organic waste into digestive waste liquid and gas, and solid components and liquid components of the digestive waste liquid The ammonia degassing process in which a part of ammonium ions are degassed with ammonia by injecting a predetermined amount of air into the solid-liquid separation process separating into the liquid-liquid separation process in the solid-liquid separation process and receiving the gas and mixing it with dissolved water , In the gas-liquid dissolution process for dissolving a gas having a relatively high solubility in the dissolved water among the gas contained in the gas, and discharging a gas having a relatively low solubility in the dissolved water to the outside, in a preset environment, the dissolved water The process of producing a composition for producing a liquid composition with the component dissolved in the ammonia and the ammonia degassing process, and an ion reaction process of receiving a liquid component and an ion-binding material from the outside to produce a solid phosphate compound. It provides an effective resource recovery method characterized in that it comprises a recovery process for recovering the solid phosphate compound produced in the ion reaction process.

As described above, according to an aspect of the present invention, while minimizing the use of chemicals, there is an advantage of efficiently recovering various resources such as methane gas, nitrogen and phosphorus.

1 is a view showing the configuration of an effective resource recovery device according to a first embodiment of the present invention.
2 is a view showing the configuration of an effective resource recovery device according to a second embodiment of the present invention.
3 is a view showing the configuration of an effective resource recovery device according to a third embodiment of the present invention.
4 is a view showing the configuration of an effective resource recovery device according to a fourth embodiment of the present invention.
5 is a graph showing changes in ammonia properties according to the pH and temperature of ammonia.
6 is a graph showing the solubility of methane and carbon dioxide in water.
7 is a flowchart illustrating an effective resource recovery method according to a first embodiment of the present invention.
8 is a flowchart illustrating an effective resource recovery method according to a second embodiment of the present invention.

The present invention can be applied to various changes and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail. However, this is not intended to limit the present invention to specific embodiments, and should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing each drawing, similar reference numerals are used for similar components.

Terms such as first, second, A, and B may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from other components. For example, the first component may be referred to as a second component without departing from the scope of the present invention, and similarly, the second component may be referred to as a first component. The term and / or includes a combination of a plurality of related described items or any one of a plurality of related described items.

When an element is said to be "connected" or "connected" to another component, it is understood that other components may be directly connected to or connected to the other component, but there may be other components in between. It should be. On the other hand, when a component is said to be "directly connected" or "directly connected" to another component, it should be understood that no other component exists in the middle.

Terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. It should be understood that terms such as “include” or “have” in the present application do not preclude the existence or addition possibility of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification. .

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by a person skilled in the art to which the present invention pertains.

Terms such as those defined in a commonly used dictionary should be interpreted as having meanings consistent with meanings in the context of related technologies, and should not be interpreted as ideal or excessively formal meanings unless explicitly defined in the present application. Does not.

In addition, each configuration, process, process or method included in each embodiment of the present invention may be shared within a technically inconsistent range.

1 is a view showing the configuration of an effective resource recovery device according to a first embodiment of the present invention.

Referring to Figure 1, the effective resource recovery apparatus 100 according to the first embodiment of the present invention is an anaerobic digester 110, solid-liquid separation tank 120, ammonia degassing tank 130, gas-liquid dissolving 140, It includes a gas storage tank 150, a composition production unit 160, an ion reaction tank 170 and a recovery unit 180.

The anaerobic digester 110 performs anaerobic digestion to decompose organic waste into digestive waste and biogas. The anaerobic digester 110 performs anaerobic digestion by receiving organic waste, such as livestock manure, food waste, or sewage debris. The anaerobic digester 110 decomposes organic waste into digestive waste liquid and biogas by using anaerobic microorganisms under anaerobic conditions in which oxygen is not present. The biogas contains about 60 to 70% of methane (CH ₄ ) and about 30 to 40% of carbon dioxide (CO ₂ ), and contains trace amounts of other substances such as hydrogen sulfide.

The digested waste liquid generated by the anaerobic digestion of the anaerobic digestion tank 110 is transferred to the solid-liquid separation tank 120, and the biogas is transferred to the gas-liquid melter 140.

The solid-liquid separation tank 120 receives the digestion waste liquid of the organic waste decomposed by the anaerobic digestion tank 110 and separates it into a solid component and a liquid component. The solid-liquid separation tank 120 separates the digested waste liquid into a solid component and a liquid component using various methods such as a filter press and a centrifugal dehydrator.

The solid-liquid separation tank 120 separates the solid component and the liquid component, the liquid component is an ammonia degassing tank 130, some of the solid components are an ion reaction tank 170, and the rest of the solid components are sludge treatment facilities (not shown) ). The solid-liquid separation tank 120 transmits all of the liquid components to the ammonia degassing tank 130 to process the ammonium ions contained in the liquid components. On the other hand, the solid-liquid separation tank 120 delivers most of the solid components (about 90%) to an external sludge treatment facility (not shown). In order to extract phosphorus contained in the solid component, a large amount of chemicals (strong acids) must be used, as in the prior art. To prevent this problem, the solid-liquid separation tank 120 delivers most of the separated solid components to an external sludge treatment facility (not shown). On the other hand, the solid-liquid separation tank 120 delivers only a portion (about 10%) of the separated solid components to the ion reaction tank 170. The solid component transferred to the ion reaction tank 170, in the future, generates an ionic reaction in the ion reaction tank 170 to generate a solid compound, thereby increasing the efficiency of compound generation by agglomeration based on the solid component.

The ammonia degassing tank 130 degass a part of the ammonium ions in the liquid component separated from the solid-liquid separation tank 120 with ammonia gas. Ammonium ions have different properties as shown in the graph in FIG. 5 according to changes in temperature and pH.

5 is a graph showing changes in ammonia properties according to the pH and temperature of ammonia.

It can be seen that the higher the pH and the higher the temperature of the ammonium ion, the higher the deaeration rate. That is, as the pH of the liquid containing ammonium ions increases or the temperature increases, a larger amount of ammonium ions is degassed with ammonia gas.

Referring to FIG. 1 again, a predetermined amount of air is injected (aeration) into the ammonia degassing tank 130. The injected air raises the pH of the liquid component in the ammonia degasser 130. As the pH of the liquid component rises, deaeration of ammonium ions contained in the liquid component to ammonia gas becomes active. Typically, the liquid component maintains the same state as that of the anaerobic digester 110, for example, the temperature may be about 35 ℃, pH may have about 7.5. In this state, when air is injected and the pH rises to 9, 48.4% of the ammonium ion may be degassed with ammonia gas. The amount of ammonia gas generated may be controlled by the amount of air injected, and the ammonia gas degassed in the ammonia degassing tank 130 is injected into the gas-liquid melter 140.

The gas-liquid dissolver 140 mixes the biogas generated in the anaerobic digester with the ammonia gas degassed in the ammonia degasser 130 with dissolved water, and separates and discharges a specific gas using a difference in solubility in the dissolved water.

The gas-liquid dissolver 140 includes dissolved water (for example, water) therein, and is injected with biogas generated in an anaerobic digester and ammonia gas degassed in the ammonia degassing tank 130 to dissolve water and the corresponding gas or Mix the gases. As mentioned above, the biogas mainly contains methane and carbon dioxide. As biogas is injected into the gas-liquid melter 140, only components having a relatively high solubility with respect to dissolved water are dissolved in the dissolved water. The solubility in dissolved water is shown in Figure 6.

6 is a graph showing the solubility of methane and carbon dioxide in water.

Figure 6 shows the solubility of methane and carbon dioxide when the water is dissolved. 4, the solubility of carbon dioxide is about 85 times higher than that of methane at the same temperature. That is, when methane and carbon dioxide biogas constituting the main components are injected into the gas-liquid dissolver 140, most of the carbon dioxide is dissolved in the dissolved water, and most of the methane is not dissolved in the dissolved water and maintains the gas state. .

Referring back to FIG. 1, the gas-liquid dissolver 140 separates methane in the biogas using the difference in solubility of gas in the dissolved water. The gas-liquid dissolver 140 has an advantage of separating a specific gas (methane) within the biogas by simply mixing the injected biogas with dissolved water without going through a separate chemical or process. The gas-liquid melter 140 separates methane and discharges it to the gas storage tank 150.

Unlike methane, most carbon dioxide is soluble in dissolved water. In the carbon dioxide to dissolve hydrogen ions (H ⁺⁾ and bicarbonate ion (HCO ₃ ^-), soluble in, whereby the pH of the melt is lowered accordingly. A drop in the pH of the dissolved water converts the ammonia gas injected into the gas-liquid dissolver back into ammonium ions. Carbon dioxide is dissolved in hydrogen ions and bicarbonate ions, and when the pH gradually decreases, bicarbonate ions are dissolved in carbonate ions (CO ₃ ^2- ) and hydrogen ions again. However, by injecting ammonia gas together with carbon dioxide into the gas-liquid dissolver 140, when the carbon dioxide is dissolved into hydrogen ions and bicarbonate ions, the generated hydrogen ions react with ammonia gas and ammonium ions are generated. Accordingly, the pH is not low enough to dissolve the bicarbonate ions again, and ammonium ions and bicarbonate ions are present in the gas-liquid dissolver 140. As described above, the gas-liquid dissolver 140 has an advantage of dissolving carbon dioxide having high solubility in ammonia gas and dissolved water, thereby creating an environment for converting ammonia gas into ammonium ions without additional solution injection.

The gas-liquid dissolver 140 delivers the ionized ammonium ion and bicarbonate ion to the composition production unit 160.

The gas-liquid dissolver 140 may additionally introduce waste gas containing carbon dioxide from the outside in addition to biogas generated in the anaerobic digester and ammonia gas degassed in the ammonia degasser 130. The gas-liquid dissolver 140 is discharged from a power plant or the like, and waste gas including carbon dioxide is introduced, and carbon dioxide may be additionally dissolved as dissolved water in the gas-liquid dissolver 140. The gas-liquid melter 140 may control the amount of dissolved carbon dioxide by additionally using an inflow of waste gas (including carbon dioxide).

The gas storage tank 150 collects and stores the gas discharged from the gas-liquid melter 140.

As described above, the gas-liquid dissolver 140 discharges a gas having low solubility in dissolved water, that is, methane gas. The gas storage tank 150 collects and stores the gas discharged from the gas-liquid melter 140. Since methane gas is collected and stored in the gas storage tank 150, the effective resource recovery device 100 can easily collect and store methane gas generated in the organic waste treatment process.

The composition production unit 160 provides a predetermined environment to produce a solid phase composition with ions dissolved in dissolved water.

As described above, bicarbonate ions and ammonium ions are present in the dissolved water. The composition production unit 160 maintains the temperature below 30 ° C and the pH above neutral, so that each ion can bind. Bicarbonate ions and ammonium ions react at a molar ratio of 1: 1, and as a result of the reaction, they are combined into a solid composition in the form of ammonium bicarbonate. Ammonium bicarbonate has a property of dissociation when the temperature is 36 ° C or higher or the pH is low, so the composition production unit 160 provides the above-described environment, so that the composition can be combined and produced. Nitrogen is extracted from the thus produced composition (ammonium bicarbonate).

The ion reaction tank 170 receives an ionic bond material and a part of the solid components separated from the liquid component, the solid-liquid separation tank 120, which has undergone ammonia degassing, and produces an ionic compound, thereby producing a solid phosphate compound.

The liquid component that has been subjected to the ammonia degassing tank contains various ions, such as some ammonium ions, phosphorus in the form of phosphate ions, and other hydroxide ions. In addition, the ion reaction tank 170 is injected with an ion-binding material to cause an ion reaction with the above-described liquid component from the outside. Here, the ion-binding material is a material that can be combined with phosphate ions and other ions contained in the liquid component to cause an ionic reaction to produce a phosphate compound in a solid phase (sediment form), for example, magnesium oxide (MgO) or This is calcium oxide (CaO). The liquid component and the ion-bonding material that have undergone the ammonia degassing reaction cause an ionic reaction in the ion reaction tank 170 and are produced as a solid phosphate compound. Assuming that the ion-binding material is magnesium oxide, ammonium ions, phosphate ions, and magnesium ions in the ion reaction tank 170 react at a molar ratio of 1: 1: 1 to form a solid phosphate compound, Struvite. do. Assuming that the ion-binding material is calcium oxide, calcium ions, phosphate ions, and hydroxide ions react at a molar ratio of 5: 3: 1 to form a solid phosphate compound, Hydroxyapatite. An example of the ion-binding material refers to magnesium oxide (MgO) or calcium oxide (CaO), but is not limited thereto, and any material that can be produced as a solid phosphate compound by being combined with phosphoric acid contained in a liquid component It can be replaced by a thing.

When ammonium ions in the ion reaction tank 170 are used for the production of solid phosphate compounds, the amount of ammonium ions can be adjusted to the amount of ammonia gas degassed in the ammonia degassing tank 130. As in the above-described example, when struvite is produced from a solid phosphate compound, ammonium ions are combined with phosphate ions in a molar ratio of 1: 1, and the amount of ammonium ions may be insufficient or large. In this case, as the amount of air injected into the ammonia degassing tank 130 is controlled, the amount of ammonium ions remaining after passing through the ammonia degassing tank 130 may be controlled.

Further, as the ion reaction tank 170, a part of solid components separated from the solid-liquid separation tank 120 and not transferred to a sludge treatment facility (not shown) is transferred to the ion reaction tank 170 together. The solid component transferred to the ion reaction tank 170 serves as a seed, thereby increasing the production efficiency of the solid phosphate compound. When the solid phosphate compound is formed, it is formed around the transferred solid component, so that the solid phosphate compound is produced more efficiently. The solid phosphate compound thus produced is transferred to the recovery unit 180.

Phosphorus may be extracted from the solid phosphate compound produced by the ion reaction in the ion reaction tank 170.

The recovery unit 180 recovers the solid composition transferred from the composition production unit 160 and the solid phosphate compound transferred from the ion reaction tank 170. The recovery unit 180 may recover nitrogen and phosphorus by recovering the solid composition (ammonium bicarbonate) and the solid phosphoric acid compound. As described above, nitrogen and phosphorus components recovered from organic waste by an effective resource recovery device may be included in various products such as fertilizer and reused.

2 is a view showing the configuration of an effective resource recovery device according to a second embodiment of the present invention.

Referring to FIG. 2, the effective resource recovery device 200 according to the second embodiment of the present invention includes a plurality of recovery units 210 and 215 in the configuration of the effective resource recovery device 100.

The recovery units 210 and 215 are connected to the composition production unit 160 and the ion reaction tank 170, respectively, so that the composition produced by the composition production unit 160 (ammonium bicarbonate) and the phosphate compound produced by the ion reaction tank 170, respectively To recover. The nitrogen component contained in the composition and the phosphorus component contained in the phosphoric acid compound may be mixed and used at the same time as the fertilizer, but the nitrogen component and the phosphorus component may be used for fertilizer and the like, respectively. When the nitrogen component and the phosphorus component need to be used respectively, and when all of them are recovered in one recovery unit, the inconvenience of separating the composition from the phosphoric acid compound occurs again. To solve this inconvenience, the effective resource recovery device 200 may connect the recovery units 210 and 215 to the composition production unit 160 and the ion reaction tank 170, respectively, and recover nitrogen and phosphorus components, respectively.

3 is a view showing the configuration of an effective resource recovery device according to a third embodiment of the present invention.

Referring to Figure 3, the effective resource recovery device 300 according to the fourth embodiment of the present invention, ammonia degassing tank 310, gas-liquid dissolver 320, which plays a different role in the configuration of the effective resource recovery device 100 , A composition production unit 330 and a recovery unit 340.

The ammonia degassing tank 310 degass a part of the ammonium ions in the liquid component separated from the solid-liquid separation tank 120 with ammonia gas. However, if there is a difference from the ammonia degassing tank 130, the ammonia degassing tank 130 injects ammonia gas into the gas-liquid dissolver 120, while the ammonia degassing tank 310 uses the degassed ammonia gas as a composition production unit 330 ).

The gas-liquid melter 320 mixes only the biogas generated in the anaerobic digester 110 with dissolved water. As described above, due to the difference in solubility of methane and carbon dioxide in dissolved water in the biogas, high concentration of methane is separated into the gas storage tank 150 and discharged, and only carbon dioxide is dissolved in dissolved water. The carbon dioxide dissolved in the dissolved water is first dissolved in hydrogen ions and bicarbonate ions in the gas-liquid melter 320, and further dissolved in hydrogen ions and carbonate ions.

Since the ammonia is injected together with biogas into the gas-liquid dissolver 140 shown in FIG. 1, when carbon dioxide is first dissolved, hydrogen ions and ammonia gas react to form ammonium ions. For this reason, a pH sufficient to dissolve the bicarbonate ions additionally into hydrogen ions and carbonate ions is not formed, and carbon dioxide is dissolved in the gas-liquid dissolver 140 only up to the bicarbonate ions.

However, since only biogas is injected into the gas-liquid melter 320 and no ammonia gas is injected, only carbon dioxide is completely dissolved in the dissolved water. First, carbon dioxide is dissolved in hydrogen ions and bicarbonate ions, as described above, the ammonia gas is not injected, the more the carbon dioxide is dissolved, the lower the pH of the dissolved water. Accordingly, bicarbonate ions are additionally dissolved as hydrogen ions and carbonate ions. Biogas (carbon dioxide) is present in the gas-liquid melter 320 until it is completely dissolved in dissolved water, and thus, finally dissolves into carbonate ions and hydrogen ions.

The gas-liquid dissolver 320 delivers carbonate ions and hydrogen ions to the composition production unit 330.

The composition production unit 330 provides a predetermined environment, and produces a liquid composition from the ammonia degasser 310 with ions dissolved in ammonia gas and dissolved water.

The ammonia gas is made of ammonium ions by hydrogen ions dissolved in dissolved water injected into the composition production unit 330. However, since the carbon dioxide is dissolved in the gas-liquid dissolver 320 to carbonate ions, not bicarbonate ions, in the composition production unit 330, carbonate ions and ammonium ions exist in ionic states, respectively, and a liquid composition is produced. The liquid composition thus produced may be used in various applications using ammonium ions, for example, fertilizer (liquid ratio).

Meanwhile, the recovery unit 340 recovers only the solid phosphate compound produced in the ion reaction tank 170. As described above, since the liquid composition is produced in the composition production unit 330, the recovery unit 340 recovers only the solid phosphate compound from the ion reaction tank 170.

4 is a view showing the configuration of an effective resource recovery device according to a fourth embodiment of the present invention.

Referring to FIG. 4, the effective resource recovery device 400 according to the fourth embodiment of the present invention further includes a partial nitrification tank 410 and an anaerobic ammonium oxidation tank 420 in the configuration of the effective resource recovery device 100. do.

The nitrogen (ammonia gas or ammonium ion) component in the liquid component separated from the solid-liquid separation tank 120 is degassed with ammonia gas to form a solid composition, or is used for the production of phosphoric acid compounds in the ion reactor and is mostly removed. However, even through each configuration, there may be nitrogen components remaining in the liquid component without reacting. The liquid components are discharged as a filtrate when the composition or the phosphoric acid compound is recovered at the recovery unit 180, and nitrogen components may remain in the liquid components discharged as the filtrate.

The partial nitrification tank 410 converts some of the ammonium ions present in the liquid component to nitrite ions. The partial nitrification tank 410 converts a portion of ammonium ions into nitrite ions or nitrite ions into nitrate ions, including ammonium oxidizing microorganisms and nitrite oxidizing microorganisms.

The anaerobic ammonium oxidation tank 420 converts ammonium ions and nitrite ions into nitrogen gas to remove nitrogen components in the liquid component. The anaerobic ammonium oxidation tank 420 removes nitrogen components remaining in the liquid component by converting ammonium ions and nitrite ions into nitrogen gas, including microorganisms growing in an anaerobic environment.

7 is a flowchart illustrating an effective resource recovery method according to a first embodiment of the present invention.

The anaerobic digester 110 performs anaerobic digestion to decompose organic waste into digestive waste liquid and biogas (S710). The biogas is delivered to the gas-liquid melter 140, and the digested waste liquid is delivered to the solid-liquid separation tank 120.

The solid-liquid separation tank 120 separates the digestive waste liquid into solid components and liquid components (S720). The solid-liquid separation tank 120 separates the solid component and the liquid component, and most of the solid component is transferred to a sludge treatment facility (not shown), and only a portion is transferred to the ion reaction tank 170, and the liquid component is ammonia degassing tank ( 130).

The ammonia degassing tank 130 degass ammonia by injecting a predetermined amount of air into the liquid component (S730). As air is injected into the ammonia degassing tank 130 to increase the pH, some of the ammonium ions contained in the liquid component are degassed with ammonia gas.

The gas-liquid dissolver 140 and the composition production unit 160 mix biogas separated from organic waste and degassed ammonia, and separate them into methane and ammonium bicarbonate (S740). Biogas and ammonia introduced into the gas-liquid melter are mixed with the dissolved water contained in the gas-liquid melter 140, and are separated by a difference in solubility in the dissolved water. Methane gas having low solubility in dissolved water does not dissolve in dissolved water and maintains the gas state as it is and is discharged to the gas storage tank 150. On the other hand, carbon dioxide having high solubility in dissolved water is dissolved in dissolved water as hydrogen ions and bicarbonate ions, mixed with dissolved water whose pH is lowered by carbon dioxide, and ammonia gas is changed to ammonium ions. Under the environment of the composition production unit 160, bicarbonate ions and ammonium ions are combined to produce solid composition, ammonium bicarbonate.

The ion reaction tank 170 produces a phosphoric acid compound by injecting a part of a solid component and an ion-binding material into a liquid component in which ammonia is degassed (S750). Ions containing phosphate ions contained in the liquid component and ion-binding substances cause an ionic reaction, producing a solid phosphate compound. Here, the ion-binding substance is a substance produced as a solid phosphate compound by performing an ionic reaction with phosphate ions contained in a liquid component. At this time, when some of the solid components separated from the solid-liquid separation tank 120 are input together, a solid phosphate compound is produced more efficiently.

The recovery unit 180 recovers ammonium bicarbonate and phosphate compounds respectively or together (S760).

8 is a flowchart illustrating an effective resource recovery method according to a second embodiment of the present invention.

The anaerobic digester 110 performs anaerobic digestion to decompose organic waste into digestive waste liquid and biogas (S810).

The solid-liquid separation tank 120 separates the digestive waste liquid into a solid component and a liquid component (S820).

The ammonia degassing tank 310 degass ammonia by injecting a predetermined amount of air into the liquid component (S830).

The gas-liquid melter 320 separates methane by dissolving biogas separated from organic waste (S840).

The composition production unit 330 recovers the liquid composition by mixing sufficiently dissolved biogas and ammonia (S850). The ammonia gas degassed in step S830 and carbon dioxide dissolved in step S840 are injected into the composition production unit 330. The composition production unit 330 recovers the liquid composition by mixing ammonia gas and carbon dioxide sufficiently dissolved.

The ion reaction tank 170 produces a phosphoric acid compound by injecting a part of a solid component and an ion-binding material into a liquid component in which ammonia is degassed (S860).

The recovery tank 340 recovers the phosphoric acid compound (S870).

7 and 8 describe that each process is executed sequentially, but this is merely illustrative of the technical idea of an embodiment of the present invention. In other words, a person skilled in the art to which one embodiment of the present invention pertains may execute or change one or more of the processes described in FIGS. 7 and 8 without departing from the essential characteristics of one embodiment of the present invention. 7 and 8 are not limited to time-series order since the process may be applied in various modifications and variations by executing in parallel.

Meanwhile, the processes illustrated in FIGS. 7 and 8 may be implemented as computer readable codes on a computer readable recording medium. The computer-readable recording medium includes all kinds of recording devices in which data readable by a computer system is stored. That is, the computer-readable recording medium includes a storage medium such as a magnetic storage medium (eg, ROM, floppy disk, hard disk, etc.) and an optical reading medium (eg, CD-ROM, DVD, etc.). The computer-readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.

The above description is merely illustrative of the technical idea of the present embodiment, and those skilled in the art to which this embodiment belongs may be capable of various modifications and variations without departing from the essential characteristics of the present embodiment. Therefore, the present embodiments are not intended to limit the technical spirit of the present embodiment, but to explain, and the scope of the technical spirit of the present embodiment is not limited by these embodiments. The scope of protection of the present embodiment should be interpreted by the claims below, and all technical spirits within the equivalent range should be interpreted as being included in the scope of the present embodiment.

100, 200, 300, 400: Effective resource recovery device
110: anaerobic digester
120: solid-liquid separation tank
130, 310: ammonia degasser
140, 320: gas-liquid dissolving
150: gas storage tank
160, 330: composition production unit
170: ion reactor
180, 210, 215, 340: recovery unit
410: partial nitrification tank
420: anaerobic ammonium oxide tank

Claims (18)

In the device for recovering the resources contained in the organic waste,
An anaerobic digester that performs anaerobic digestion to decompose the organic waste into digestive waste liquid and gas;
A solid-liquid separation tank for separating the digestive waste liquid into solid components and liquid components;
An ammonia degassing tank for degassing a part of ammonium ions into ammonia by injecting a predetermined amount of air into the liquid component separated from the solid-liquid separation tank;
Gas liquid that receives the gas and the ammonia and mixes it with dissolved water, dissolves a gas having a relatively high solubility in the dissolved water among gases contained in the gas, and discharges a gas having a relatively low solubility in the dissolved water to the outside. Dissolver;
A composition production unit that provides a predetermined environment and produces a solid phase composition with a component dissolved in the dissolved water;
An ion reaction tank for receiving a liquid component that has passed through the ammonia degassing tank and an ion-binding material from the outside to produce a solid phosphate compound; And
The composition production unit and the recovery unit for recovering the solid composition and the solid phosphate compound produced in the ion reaction tank, respectively
Effective resource recovery device comprising a. According to claim 1,
The ammonia degassing tank,
An effective resource recovery device characterized in that the ammonia is deaerated by increasing the deaeration efficiency of ammonia by increasing the pH by injecting the predetermined amount of air. According to claim 1,
The gas,
Effective resource recovery device comprising methane and carbon dioxide. According to claim 3,
The gas with low solubility in the dissolved water,
Effective resource recovery device, characterized in that methane. The method of claim 4,
An effective resource recovery device further comprising a gas storage tank for collecting and storing methane discharged from the gas-liquid smelter. According to claim 3,
The composition production unit,
Effective resource recovery device, characterized in that for producing ammonium bicarbonate using ammonia and carbon dioxide dissolved in the dissolved water. According to claim 1,
The recovery unit,
Connected to both the composition production section and the ion reaction tank to recover the solid composition and the solid phosphate compound at once, or to the composition production section and the ion reaction tank, respectively, to recover the solid composition and the solid phosphate compound separately Effective resource recovery device characterized in that. According to claim 1,
The gas-liquid dissolver,
Effective resource recovery device characterized in that the waste gas containing carbon dioxide is additionally introduced from the outside and mixed with dissolved water. In the method of recovering the resources contained in the organic waste,
An anaerobic digestion process that performs anaerobic digestion to decompose the organic waste into digestive waste liquid and gas;
A solid-liquid separation process for separating the digestive waste liquid into solid components and liquid components;
An ammonia degassing process in which a part of the ammonium ion is degassed with ammonia by injecting a predetermined amount of air to the liquid component separated in the solid-liquid separation process;
Gas liquid that receives the gas and the ammonia and mixes it with dissolved water, dissolves a gas having a relatively high solubility in the dissolved water among gases contained in the gas, and discharges a gas having a relatively low solubility in the dissolved water to the outside. Dissolution process;
In a predetermined environment, a composition production process for producing a solid phase composition with a component dissolved in the dissolved water;
An ionic reaction process for receiving a liquid component that has undergone the ammonia degassing process and an ion-binding material from the outside to produce a solid phosphate compound; And
The composition production process and the recovery process for recovering the solid composition and the solid phosphate compound respectively produced in the ion reaction process
Effective resource recovery method comprising a. The method of claim 9,
The gas,
Method for recovering effective resources comprising methane and carbon dioxide. The method of claim 10,
The gas with low solubility in the dissolved water,
Methane is an effective resource recovery method characterized in that. In the device for recovering the resources contained in the organic waste,
An anaerobic digester that performs anaerobic digestion to decompose the organic waste into digestive waste liquid and gas;
A solid-liquid separation tank for separating the digestive waste liquid into solid components and liquid components;
An ammonia degassing tank for degassing a part of ammonium ions into ammonia by injecting a predetermined amount of air into the liquid component separated from the solid-liquid separation tank;
A gas-liquid dissolver that receives the gas and mixes it with dissolved water, dissolves a gas having a relatively high solubility in the dissolved water among gases contained in the gas, and discharges a gas having a relatively low solubility in the dissolved water to the outside;
A composition production unit that provides a pre-set environment, and produces a liquid composition with the component dissolved in the dissolved water and the ammonia;
An ion reaction tank for receiving a liquid component that has passed through the ammonia degassing tank and an ion-binding material from the outside to produce a solid phosphate compound; And
Recovery unit for recovering the solid phosphate compound produced in the ion reaction tank
Effective resource recovery device comprising a. The method of claim 12,
The gas,
Effective resource recovery device comprising methane and carbon dioxide. The method of claim 12,
The gas-liquid dissolver,
Effective resource recovery device characterized in that the waste gas containing carbon dioxide is additionally introduced from the outside and mixed with dissolved water. The method of claim 12,
The composition production unit,
Effective resource recovery device, characterized in that for producing a liquid fertilizer (液肥) using the produced liquid composition. In the method of recovering the resources contained in the organic waste,
An anaerobic digestion process that performs anaerobic digestion to decompose the organic waste into digestive waste liquid and gas;
A solid-liquid separation process for separating the digestive waste liquid into solid components and liquid components;
An ammonia degassing process in which a part of the ammonium ion is degassed with ammonia by injecting a predetermined amount of air to the liquid component separated in the solid-liquid separation process;
A gas-liquid dissolving process in which the gas is mixed with dissolved water to dissolve a gas having a relatively high solubility in the dissolved water among gases contained in the gas, and discharges a gas having a relatively low solubility to the dissolved water to the outside;
In a predetermined environment, a composition production process for producing a liquid composition of the component dissolved in the dissolved water and the ammonia;
An ionic reaction process for receiving a liquid component that has undergone the ammonia degassing process and an ion-binding material from the outside to produce a solid phosphate compound; And
Recovery process for recovering the solid phosphate compound produced in the ion reaction process
Effective resource recovery method comprising a. In the device for recovering the resources contained in the organic waste,
An anaerobic digester that performs anaerobic digestion to decompose the organic waste into digestive waste liquid and gas;
A solid-liquid separation tank for separating the digestive waste liquid into solid components and liquid components;
An ammonia degassing tank for degassing a part of ammonium ions into ammonia by injecting a predetermined amount of air to the liquid component separated from the solid-liquid separation tank;
Gas liquid that receives the gas and the ammonia and mixes with dissolved water to dissolve a gas having a relatively high solubility in the dissolved water among gases contained in the gas, and discharges a gas having a relatively low solubility to the dissolved water to the outside. Dissolver;
A composition production unit that provides a predetermined environment and produces a solid phase composition with a component dissolved in the dissolved water;
An ion reaction tank for receiving a liquid component that has passed through the ammonia degassing tank and an ion-binding material from the outside to produce a solid phosphate compound;
A recovery unit for recovering the solid composition and the solid phosphate compound produced in the composition production unit and the ion reaction tank, respectively; And
Oxidation tank for removing nitrogen components remaining in the filtrate discharged without being recovered from the recovery unit
Effective resource recovery device comprising a. In the method of recovering the resources contained in the organic waste,
An anaerobic digestion process that performs anaerobic digestion to decompose the organic waste into digestive waste liquid and gas;
A solid-liquid separation process for separating the digestive waste liquid into solid components and liquid components;
An ammonia degassing process in which a part of the ammonium ion is degassed with ammonia by injecting a predetermined amount of air to the liquid component separated in the solid-liquid separation process;
Gas liquid that receives the gas and the ammonia and mixes it with dissolved water, dissolves a gas having a relatively high solubility in the dissolved water among gases contained in the gas, and discharges a gas having a relatively low solubility in the dissolved water to the outside. Dissolution process;
In a predetermined environment, a composition production process for producing a solid phase composition with a component dissolved in the dissolved water;
An ionic reaction process for receiving a liquid component that has undergone the ammonia degassing process and an ion-binding material from the outside to produce a solid phosphate compound;
A recovery process for recovering the solid composition and the solid phosphate compound produced in the composition production process and the ion reaction process, respectively; And
Oxidation process to remove nitrogen components remaining in the filtrate that is not recovered during the recovery process
Effective resource recovery method comprising a.

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