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JP-7855553-B2 - Fertilizer production method, information processing device, and fertilizer production program

JP7855553B2JP 7855553 B2JP7855553 B2JP 7855553B2JP-7855553-B2

Inventors

  • 榎 康明

Assignees

  • 株式会社プラントフォーム
  • メタウォーター株式会社

Dates

Publication Date
20260508
Application Date
20230707

Claims (8)

  1. A step of extracting from organic wastewater containing phosphorus, nitrogen, and potassium components a first solution containing at least the phosphorus component, a second solution containing at least the nitrogen component, and a third solution containing at least the potassium component, respectively. A step of ionizing the phosphorus component contained in the first solution, The process includes a step of producing fertilizer from at least one of the first solution containing the ionized phosphorus component, the extracted second solution, and the extracted third solution. In the extraction process, The first solution is extracted from the aforementioned organic wastewater. A method for producing fertilizer, comprising: applying a voltage to the organic wastewater from which the first solution has been extracted, or using at least one of a resin capable of adsorbing anions and a resin capable of adsorbing cations, to extract a second solution containing a nitrate component, which is an anion, and a third solution containing a potassium component, which is a cation, from the organic wastewater from which the first solution has been extracted .
  2. The fertilizer production method according to claim 1, wherein the organic wastewater is aquaculture wastewater.
  3. Furthermore, the process includes a step of separating a solution containing microorganisms from the first solution in which the phosphorus component has been ionized. The fertilizer production method according to claim 1, wherein the production step involves producing fertilizer from at least one of the first solution obtained by separating the solution containing the microorganisms, the extracted second solution, and the extracted third solution.
  4. The fertilizer production method according to claim 1, wherein the ionization step involves ionizing the phosphorus component contained in the first solution by biological treatment.
  5. The fertilizer production method according to claim 1, wherein the ionization step involves pulverizing the sludge contained in the first solution to dissolve the ionized phosphorus component from the sludge.
  6. A fertilizer production method in which a computer performs a process of producing fertilizer by mixing a first solution, a second solution, and a third solution extracted from organic wastewater containing phosphorus, nitrogen, and potassium components, The first solution comprises at least the ionized phosphorus component, The second solution contains at least an ionized nitrate component as the nitrogen component, The third solution contains at least an ionized potassium component as the potassium component, The first solution is extracted from the organic wastewater, The second solution and the third solution are each extracted from the organic wastewater from which the first solution was extracted by applying a voltage to the organic wastewater from which the first solution was extracted, or by using at least one of a resin capable of adsorbing anions and a resin capable of adsorbing cations. The system accepts input regarding the intended use of the fertilizer and the amount of fertilizer produced. The system refers to a storage unit that stores information regarding the mixing ratio of the first solution, the second solution, and the third solution, and identifies the mixing ratio corresponding to the application for which input was received. Based on the amount of production received as input and the specified mixing ratio, the first mixing amount of the first solution, the second mixing amount of the second solution, and the third mixing amount of the third solution are determined. A method for producing fertilizer, comprising mixing the first solution corresponding to the first mixing amount, the second solution corresponding to the second mixing amount, and the third solution corresponding to the third mixing amount to produce the fertilizer.
  7. An information processing device that produces fertilizer by mixing a first solution, a second solution, and a third solution extracted from organic wastewater containing phosphorus, nitrogen, and potassium components, The first solution comprises at least the ionized phosphorus component, The second solution contains at least an ionized nitrate component as the nitrogen component, The third solution contains at least an ionized potassium component as the potassium component, The first solution is extracted from the organic wastewater, The second solution and the third solution are each extracted from the organic wastewater from which the first solution was extracted by applying a voltage to the organic wastewater from which the first solution was extracted, or by using at least one of a resin capable of adsorbing anions and a resin capable of adsorbing cations. The system accepts input regarding the intended use of the fertilizer and the amount of fertilizer produced. The system refers to a storage unit that stores information regarding the mixing ratio of the first solution, the second solution, and the third solution, and identifies the mixing ratio corresponding to the application for which input was received. Based on the amount of production received as input and the specified mixing ratio, the first mixing amount of the first solution, the second mixing amount of the second solution, and the third mixing amount of the third solution are determined. An information processing apparatus that produces the fertilizer by mixing the first solution corresponding to the first mixing amount, the second solution corresponding to the second mixing amount, and the third solution corresponding to the third mixing amount.
  8. A fertilizer production program that causes a computer to perform a process of producing fertilizer by mixing a first solution, a second solution, and a third solution extracted from organic wastewater containing phosphorus, nitrogen, and potassium components, The first solution comprises at least the ionized phosphorus component, The second solution contains at least an ionized nitrate component as the nitrogen component, The third solution contains at least an ionized potassium component as the potassium component, The first solution is extracted from the organic wastewater, The second solution and the third solution are each extracted from the organic wastewater from which the first solution was extracted by applying a voltage to the organic wastewater from which the first solution was extracted, or by using at least one of a resin capable of adsorbing anions and a resin capable of adsorbing cations. The system accepts input regarding the intended use of the fertilizer and the amount of fertilizer produced. The system refers to a storage unit that stores information regarding the mixing ratio of the first solution, the second solution, and the third solution, and identifies the mixing ratio corresponding to the application for which input was received. Based on the amount of production received as input and the specified mixing ratio, the first mixing amount of the first solution, the second mixing amount of the second solution, and the third mixing amount of the third solution are determined. A fertilizer production program that produces the fertilizer by mixing the first solution corresponding to the first mixing amount, the second solution corresponding to the second mixing amount, and the third solution corresponding to the third mixing amount.

Description

This disclosure relates to a fertilizer production method, an information processing device, and a fertilizer production program. For example, a technology has emerged that generates organic fertilizer (hereinafter simply referred to as fertilizer) usable in plant cultivation by using organic wastewater (hereinafter simply referred to as organic wastewater) such as fish excrement discharged from fish farming tanks (hereinafter simply referred to as fish farming tanks) (see Patent Document 1). Japanese Patent Publication No. 2019-131432 Figure 1 is a diagram illustrating the configuration of the fertilizer production system 100 in the first embodiment.Figure 2 is a diagram illustrating the hardware configuration of the control device 10.Figure 3 is a diagram illustrating the functions of the control device 10.Figure 4 is a flowchart illustrating the fertilizer production control in the first embodiment.Figure 5 illustrates a specific example of mixing ratio information DT.Figure 6 is a diagram illustrating the configuration of the fertilizer production system 200 in the second embodiment. Embodiments of this disclosure will be described below with reference to the drawings. However, this description should not be interpreted as limiting, and it will not limit the subject matter described in the claims. Furthermore, various modifications, substitutions, and alterations can be made without departing from the spirit and scope of this disclosure. Different embodiments can also be combined as appropriate. [Fertilizer production system 100 in the first embodiment] First, the configuration of the fertilizer production system 100 in the first embodiment will be described. Figure 1 is a diagram illustrating the configuration of the fertilizer production system 100 in the first embodiment. The fertilizer production system 100 is a system that produces fertilizer (liquid fertilizer) from organic wastewater discharged from, for example, aquaculture tanks (not shown). Organic wastewater is, for example, wastewater containing fish feed (leftovers) and excrement from aquaculture tanks. Hereinafter, the method of producing fertilizer in the fertilizer production system 100 will also be referred to as the fertilizer production method. Specifically, as shown in Figure 1, the fertilizer production system 100 includes, for example, a filtration device 1, an ionizer 2, an ion concentrator 3, and storage tanks T0, T1, T2, T3, T4, and T5. The storage tank T0 stores, for example, organic wastewater discharged from an aquaculture tank. Specifically, a pump (not shown) installed in a pipe (not shown) connecting the aquaculture tank and the storage tank T0 continuously supplies, for example, organic wastewater stored in the aquaculture tank to the storage tank T0. The storage tank T0 then sequentially stores, for example, the organic wastewater supplied by the pump. The organic wastewater supplied from the aquaculture tanks (organic wastewater stored in storage tank T0) is a liquid containing, for example, phosphorus, potassium, and nitrogen components. Specifically, the phosphorus component in the organic wastewater includes, for example, insoluble phosphorus. The potassium component in the organic wastewater includes, for example, ionized potassium (hereinafter simply referred to as potassium ions). Furthermore, the nitrogen component in the organic wastewater includes, for example, ionized nitrate (hereinafter simply referred to as nitrate ions). The filtration device 1 performs ultrafiltration of organic wastewater supplied from the storage tank T0 via line L1, for example, by using a filtration membrane (not shown). Line L1 is, for example, a pipe connecting the storage tank T0 and the filtration device 1. Specifically, a pump (not shown) installed in line L1 continuously supplies organic wastewater stored in storage tank T0 to the filtration device 1. The filtration device 1 then separates the supplied organic wastewater into a liquid containing potassium and nitrate components (hereinafter also referred to as membrane permeate) and a liquid containing phosphorus components and sludge (hereinafter also referred to as phosphorus concentrate or first solution) by performing ultrafiltration on the organic wastewater supplied by the pump. That is, the filtration device 1 extracts the liquid that has permeated the filtration membrane as membrane permeate and the liquid that has not permeated the filtration membrane as phosphorus concentrate. The ionizer 2 ionizes the phosphorus components contained in the phosphorus concentrate supplied from the filtration device 1 via line L2, for example. Line L2 is, for example, a pipe connecting the filtration device 1 and the ionizer 2. Here, the ionization device 2 may, for example, ionize the phosphorus components contained in the phosphorus concentrate by biological treatment. Specifically, the ionization device 2 may, for example, use phosphate-accumulating bacteria to accumulate phosphorus