Method, device and server for the targeted conversion of the chemical potential of sewage

Abstract

The application provides a sewage chemical potential directional conversion method, device and server, relates to the technical field of environmental protection and new energy technology, and comprises the following steps: carrying out chemical potential enrichment treatment on the COD of the influent to obtain an energy-rich substrate; performing temperature control treatment and microbial degradation treatment on the exogenous organic waste and the energy-rich substrate through a directional conversion unit to obtain crude biogas and supernatant, and degrading the supernatant through a microbial electrolysis cell to generate hydrogen; performing power generation treatment and heat recovery treatment on the crude biogas through a cogeneration unit to perform self-energy supply, and intelligently scheduling the crude biogas, hydrogen, and the residual electric energy and heat energy after self-energy supply through an energy management and output unit to obtain a target energy scheduling strategy, so that the collaborative management of various heterogeneous energies after directional conversion is performed according to the target energy scheduling strategy. The application can significantly improve the comprehensive recovery rate of sewage.

Description

Technical Field

[0001] This invention relates to the technical field of the intersection of environmental protection and new energy technologies, and in particular to a method, apparatus and server for the targeted conversion of the chemical potential of wastewater. Background Technology

[0002] Currently, the common energy recovery method proposed by relevant technologies in the industry is anaerobic digestion combined with cogeneration, which produces biogas by treating primary sludge and residual sludge and then burning it to generate electricity and heat. However, the above scheme not only has a single conversion path and limited product value, but also limits its energy recovery target to the sludge phase, capturing only about 20%-30% of the influent COD. The large amount of dissolved organic matter that makes up the majority of the influent COD cannot be effectively collected and cannot recover energy. In addition, it will consume additional electrical energy in the subsequent oxidation and decomposition process, resulting in a low wastewater recovery rate. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a method, apparatus and server for the targeted conversion of the chemical potential of wastewater, which can significantly improve the overall recovery rate of wastewater.

[0004] In a first aspect, embodiments of the present invention provide a method for the targeted conversion of chemical potential in wastewater. The method includes: performing chemical potential enrichment treatment on influent COD to obtain an energy-rich matrix, wherein the energy-rich matrix includes: energy-rich sludge and adsorbent concentrate; performing temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and energy-rich matrix through a targeted conversion unit to obtain crude biogas and supernatant, and degrading the supernatant through a microbial electrolysis cell to generate hydrogen; using a cogeneration unit to generate electricity and recover heat from the crude biogas to achieve self-sufficiency, and intelligently scheduling the crude biogas, hydrogen, and residual electrical and thermal energy after self-sufficiency through an energy management and output unit to obtain a target energy scheduling strategy, and performing coordinated management of various heterogeneous energy sources after targeted conversion according to the target energy scheduling strategy.

[0005] In one embodiment, the step of chemical potential enrichment treatment of influent COD to obtain an energy-rich matrix includes: performing primary enrichment treatment of influent COD through a high-efficiency primary sedimentation tank to obtain energy-rich sludge and effluent, and performing secondary enrichment treatment of the effluent using an adsorption and concentration reactor to adsorb and concentrate the effluent to obtain an adsorbent concentrate, using the energy-rich sludge and adsorbent concentrate as the energy-rich matrix.

[0006] In one embodiment, the step of obtaining crude biogas and supernatant by performing temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and energy-rich substrate through a directional conversion unit includes: transporting exogenous organic waste and energy-rich substrate to an anaerobic co-digestion reactor, and controlling the temperature in the anaerobic co-digestion reactor within the preset optimal activity temperature range of methanogens, so as to perform microbial degradation treatment on exogenous organic waste and energy-rich substrate to obtain crude biogas and supernatant.

[0007] In one embodiment, the step of degrading the supernatant to generate hydrogen gas by a microbial electrolysis cell includes: controlling the microbial electrolysis cell to release a small external voltage of a preset voltage value to drive the electroactive microorganisms to catalyze the reaction, thereby degrading the anaerobic digested supernatant to generate high-purity hydrogen gas with a purity of 95%.

[0008] In one embodiment, after the step of using crude biogas for power generation and heat recovery through a cogeneration unit to perform self-powering, the process includes: using the remaining electrical energy after self-powering to electrolyze pure water through a proton exchange membrane electrolyzer to obtain electrolyzed hydrogen, and then feeding the electrolyzed hydrogen and the carbon dioxide generated by the cogeneration unit into a catalytic methane reactor to obtain natural gas.

[0009] In one implementation, the steps of intelligently scheduling crude biogas, hydrogen, and residual electrical and thermal energy after self-powered energy supply through an energy management and output unit to obtain a target energy scheduling strategy include: real-time monitoring of energy production and consumption data during the targeted conversion process of wastewater chemical potential, and intelligent scheduling based on the monitoring results using AI algorithms and digital twin models built into the energy management and output unit to obtain the target energy scheduling strategy.

[0010] In one implementation, the step of obtaining a target energy scheduling strategy by performing intelligent scheduling processing based on monitoring results through the AI ​​algorithm and digital twin model built into the energy management and output unit includes: using the AI ​​algorithm and digital twin model, with the maximization of economic benefits as the objective function, performing intelligent scheduling processing under multiple constraints for crude biogas, hydrogen, natural gas, and surplus electrical and thermal energy, obtaining the charging, discharging, and opening / closing control strategies of the energy storage devices corresponding to each heterogeneous energy source, and determining the control strategies as the target energy scheduling strategy.

[0011] Secondly, embodiments of the present invention also provide a targeted conversion device for the chemical potential of wastewater. The device includes: a chemical potential enrichment module, which performs chemical potential enrichment treatment on the influent COD to obtain an energy-rich matrix, wherein the energy-rich matrix includes: energy-rich sludge and adsorbent concentrate; a targeted conversion module, which performs temperature control treatment and microbial degradation treatment on exogenous organic waste and energy-rich matrix through a targeted conversion unit to obtain crude biogas and supernatant, and degrades the supernatant through a microbial electrolysis cell to generate hydrogen; and an energy management module, which uses a cogeneration unit to generate electricity and recover heat from the crude biogas to achieve self-powered operation, and performs intelligent scheduling treatment on the crude biogas, hydrogen, and the remaining electrical and thermal energy after self-powered operation through an energy management and output unit to obtain a target energy scheduling strategy, so as to perform coordinated management of various heterogeneous energy sources after targeted conversion according to the target energy scheduling strategy.

[0012] Thirdly, embodiments of the present invention also provide a server, including a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement any of the methods provided in the first aspect.

[0013] Fourthly, embodiments of the present invention also provide a computer-readable storage medium storing computer-executable instructions, which, when invoked and executed by a processor, cause the processor to implement any of the methods provided in the first aspect.

[0014] The embodiments of the present invention bring the following beneficial effects:

[0015] This invention provides a method, apparatus, and server for the targeted conversion of chemical potential in wastewater. The method first enriches the influent COD with chemical potential to obtain an energy-rich matrix. Then, a targeted conversion unit performs temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and the energy-rich matrix to obtain crude biogas and supernatant. The supernatant is then degraded in a microbial electrolysis cell to generate hydrogen. Finally, a combined heat and power (CHP) unit utilizes the crude biogas for power generation and heat recovery to achieve self-sufficiency. An energy management and output unit intelligently schedules the crude biogas, hydrogen, and residual electricity and heat after self-sufficiency to obtain a target energy scheduling strategy. This strategy enables the coordinated management of various heterogeneous energy sources after targeted conversion. This invention can significantly improve the comprehensive recovery rate of wastewater.

[0016] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention are realized and obtained in accordance with the structures particularly pointed out in the description, claims and drawings.

[0017] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic flowchart of a method for the targeted conversion of wastewater chemical potential provided in an embodiment of the present invention;

[0020] Figure 2 A schematic diagram of a specific process for a method of targeted conversion of the chemical potential of wastewater provided in an embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of a device for the directional conversion of wastewater chemical potential provided in an embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of a server provided in an embodiment of the present invention. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Urban wastewater treatment is a crucial link in maintaining the urban ecological cycle, but it is also an energy-intensive industry, consuming approximately 1%-3% of the total social electricity consumption. Therefore, it creates certain carbon emission pressure. However, urban wastewater itself is a low-grade, stable-distribution renewable resource. The theoretical value of its chemical potential (mainly in the form of organic matter COD) is about 9-10 times the energy consumed in treating it. In other words, the traditional wastewater treatment model consumes energy, which actually wastes the huge energy potential of the water. Therefore, the efficient recovery and conversion of the chemical potential of wastewater, and the transformation of wastewater treatment plants from traditional energy consumers to energy factories, has extremely important practical and economic significance for promoting the carbon neutrality process of the water industry and even cities.

[0025] Currently, the common energy recovery method in the industry is anaerobic digestion (AD) combined with cogeneration (CHP). This technology produces biogas (mainly composed of methane and carbon dioxide) by treating primary and excess sludge, and then burns it to generate electricity and heat. However, this traditional approach has fundamental flaws: First, its energy recovery is limited to the sludge phase, capturing only about 20%-30% of the influent COD, while the majority (about 70%-80%) of dissolved organic matter is not effectively collected and is ultimately oxidized and decomposed in the subsequent high-energy-consuming aeration biochemical unit. This not only fails to recover energy but also consumes additional electricity. Second, the conversion path is singular and the product value is limited. Energy output mainly consists of low-grade heat and medium-grade electricity that is difficult to connect to the grid, lacking high-value-added energy commodities. Finally, this process produces a large amount of biogas containing impurities. Direct emission or purification of carbon dioxide is costly, significantly reducing carbon reduction benefits and potentially even becoming a new carbon source.

[0026] In summary, existing technologies for recovering the chemical potential of wastewater suffer from core bottlenecks such as limited recovery targets, single conversion pathways, low energy product value, and significant carbon footprint. Therefore, there is an urgent need for a disruptive system and solution that can systematically and comprehensively enrich various chemical potentials in wastewater and convert them into a variety of high-value renewable energy sources. Based on this, the wastewater chemical potential conversion method, device, and server provided by this invention can efficiently collect and convert the chemical potential (chemical energy) contained in wastewater, and, in conjunction with other wastes in the plant, ultimately stably produce various forms of renewable energy such as electricity, heat, and hydrogen.

[0027] To facilitate understanding of this embodiment, a method for the targeted conversion of wastewater chemical potential disclosed in this invention will first be described in detail. This method is applied to a targeted conversion system for wastewater chemical potential, which mainly includes a chemical potential enrichment unit, a core targeted conversion unit, and an energy management and output unit.

[0028] The chemical potential enrichment unit is used to separate and concentrate suspended, colloidal and dissolved organic matter from raw wastewater, and output energy-rich matrix and low chemical oxygen demand clean water. That is, through efficient primary sedimentation and adsorption concentration processes, suspended, colloidal and dissolved organic matter in wastewater are efficiently captured to produce energy-rich matrix.

[0029] The core directional conversion unit is connected to the chemical potential enrichment unit. It is used to receive the energy-rich substrate and perform anaerobic digestion to produce biogas and microbial electrolysis to produce hydrogen. The biogas produced is then used for cogeneration. That is, through anaerobic co-digestion and microbial electrolysis, the energy-rich substrate is directionally converted into biogas and hydrogen. Through cogeneration and catalytic methanation technology, electricity, heat, high-purity hydrogen and biomethane are produced. The energy-rich substrate includes primary sludge and adsorbent concentrate.

[0030] The energy management and output unit is connected to the core directional conversion unit and is used to receive and schedule the electrical energy, heat energy and hydrogen generated by the core directional conversion unit and output them to the outside. That is, through the intelligent energy management system, multiple energy flows are coordinated and scheduled to maximize energy efficiency.

[0031] In addition, the chemical potential enrichment unit also includes: a high-efficiency primary sedimentation tank and an adsorption-concentration reactor; wherein, the high-efficiency primary sedimentation tank is used to separate suspended and colloidal organic matter in the raw sewage through chemically enhanced sedimentation to obtain primary sludge; the adsorption-concentration reactor is connected to the outlet of the high-efficiency primary sedimentation tank and is used to adsorb dissolved organic matter through an adsorbent, and after passing through a solid-liquid separation device, adsorbent concentrate and low chemical oxygen demand water are obtained, wherein the adsorbent used in the adsorption-concentration reactor is one or more of powdered activated carbon, modified zeolite, and graphene; the solid-liquid separation device is an ultrafiltration membrane module or a high-efficiency sedimentation tank.

[0032] Furthermore, the core targeted conversion unit includes: an anaerobic co-digestion reactor, a microbial electrolysis cell system, a cogeneration unit, a catalytic methanation reactor, and a proton exchange membrane electrolyzer.

[0033] 1. The feed inlet of the anaerobic co-digestion reactor is used to receive energy-rich substrate and exogenous organic waste, and to produce crude biogas; 2. The inlet of the microbial electrolysis system is used to receive the effluent or part of the raw wastewater from the anaerobic co-digestion reactor, and to produce hydrogen; 3. The gas inlet of the cogeneration unit is connected to the biogas outlet of the anaerobic co-digestion reactor, and is used to convert crude biogas into electrical and thermal energy; 4. The gas inlet of the catalytic methanation reactor is connected to the hydrogen outlet of the microbial electrolysis system and the carbon dioxide outlet of the cogeneration unit, respectively, and is used to catalytically react hydrogen and carbon dioxide to produce methane; 5. The power input terminal of the proton exchange membrane electrolyzer is connected to the power output terminal of the cogeneration unit, and is used to produce hydrogen using surplus electrical energy.

[0034] The energy management and output unit includes: an energy storage module, an external transmission interface, and an energy management system; wherein, the energy storage module includes one or more of the following: a battery pack, a thermal storage tank, a hydrogen storage tank, and a gas storage tank; the external transmission interface includes one or more of the following: a grid connection device, a heating network interface, a natural gas pipeline injection interface, and a hydrogen refueling station interface; the energy management system is built on an industrial Internet of Things and cloud computing platform, used to monitor the energy production and consumption data of the entire plant in real time, and to control the charging and discharging of the energy storage module and the opening and closing of the external transmission interface through a built-in optimization algorithm to achieve optimized energy scheduling.

[0035] This invention solves the problem of dissolved organic matter recovery, realizes the diversification and high-value of energy products, and significantly improves the energy self-sufficiency rate and carbon emission reduction capacity of wastewater treatment plants.

[0036] See Figure 1 The diagram shows a flow chart of a method for the targeted conversion of chemical potential in wastewater. This method mainly includes the following steps S102 to S106:

[0037] Step S102 involves chemical potential enrichment treatment of the influent COD to obtain an energy-rich matrix, wherein the energy-rich matrix includes: energy-rich sludge and adsorbent concentrate.

[0038] In one embodiment, the above-mentioned adsorption-concentration front-end enrichment method can significantly improve the energy recovery rate because the method breaks through the limitation of traditional processes that only recover sludge energy, and efficiently captures dissolved organic matter that accounts for the main part of influent COD and is usually consumed by aeration, which can increase the overall chemical potential recovery rate of the whole plant to more than 60%.

[0039] In step S104, the exogenous organic waste and energy-rich substrate are subjected to temperature control and microbial degradation treatment through a directional conversion unit to obtain crude biogas and supernatant. The supernatant is then degraded through a microbial electrolysis cell to generate hydrogen.

[0040] In one implementation, the aforementioned targeted conversion method can diversify and increase the value of energy products. By coupling anaerobic digestion, MEC hydrogen production, and catalytic methanation, it can achieve the co-production of four energy sources: electricity, heat, hydrogen, and biogas, and produce high-value hydrogen energy and pipeline-grade methane in a targeted manner, thereby greatly enhancing the economic value and utilization flexibility of energy products.

[0041] Step S106: Through the cogeneration unit, the crude biogas is used for power generation and heat recovery to achieve self-sufficiency. The crude biogas, hydrogen, and the remaining electrical and thermal energy after self-sufficiency are intelligently dispatched through the energy management and output unit to obtain the target energy dispatch strategy. The coordinated management of various heterogeneous energy sources after directional conversion is carried out according to the target energy dispatch strategy.

[0042] In one implementation, a method for intelligent multi-energy flow collaborative optimization, based on an energy management system (EMS) using industrial IoT and AI algorithms, enables real-time scheduling and closed-loop control of heterogeneous energy flows, responds to market electricity prices, dynamically optimizes allocation strategies, and maximizes overall economic benefits.

[0043] Based on this, the above-mentioned method for targeted conversion of wastewater chemical potential provided in the embodiments of the present invention first uses a chemical potential enrichment unit to employ a two-stage process of efficient primary sedimentation and adsorption concentration to capture particulate and dissolved organic matter in wastewater to the maximum extent, generating a high-concentration energy-rich matrix, while producing low-COD clean water to create conditions for subsequent energy saving and consumption reduction.

[0044] The enriched organic matter enters the core targeted conversion unit, where it is stably converted into biogas through anaerobic co-digestion. An innovative microbial electrolysis (MEC) technology is introduced to treat recalcitrant wastewater and co-produce high-purity hydrogen. The biogas produced is converted into electricity and heat through cogeneration (CHP), and surplus electricity and byproduct carbon dioxide can be further utilized to synthesize high-quality biogas through catalytic methanation. This achieves the targeted and synergistic conversion of pollutants into multiple energy products, including electricity, heat, hydrogen, and methane.

[0045] Ultimately, all energy products are integrated into the energy management and output unit. Relying on the smart energy management system (EMS) based on the Industrial Internet of Things, the storage, self-use and external sales of various heterogeneous energy flows such as electricity, heat and gas are optimized and scheduled in real time. This ultimately drives the wastewater treatment plant to completely transform from an energy consumer into a production-oriented energy plant, achieving the dual goals of energy self-sufficiency and carbon emission reduction.

[0046] See Figure 2 The diagram shows a specific flow chart of a method for the targeted conversion of wastewater chemical potential. This embodiment of the invention also provides an implementation method for the targeted conversion of wastewater chemical potential, as detailed in (1) to (3) below:

[0047] (1) Chemical potential enrichment: The COD of the influent is enriched in the first stage through a high-efficiency primary sedimentation tank to obtain energy-rich sludge and effluent. The effluent is then enriched in the second stage through an adsorption and concentration reactor. The effluent is then adsorbed and concentrated to obtain an adsorbent concentrate, which is used as an energy-rich substrate.

[0048] Specifically, the design of the aforementioned chemical potential enrichment unit overturns the traditional energy dissipation model, instead following a new paradigm of front-end separation and back-end transformation, aiming to efficiently capture the chemical potential in wastewater from the source. This chemical potential enrichment unit first performs primary enrichment through a high-efficiency primary sedimentation tank (such as a chemically enhanced CEPT or high-load sedimentation tank), utilizing coagulants and flocculation to rapidly separate suspended solids and colloidal organic matter in the wastewater, thereby efficiently retaining 50-70% of the influent COD in a short time, forming the first stream of energy-enriched sludge.

[0049] Subsequently, the effluent after primary sedimentation enters the secondary enrichment stage, namely, the adsorption-concentration reactor. The highly efficient adsorbents such as powdered activated carbon (PAC) added in the adsorption-concentration reactor rapidly adsorb and capture the organic matter dissolved in the water. Then, solid-liquid separation is achieved through membrane separation or high-efficiency precipitation, which can further remove 60-80% of the dissolved COD, producing a clear liquid with extremely low organic matter concentration, as well as a second stream of adsorbent concentrate rich in organic matter.

[0050] Ultimately, the unit produces two streams of high-concentration energy-rich substrate and low-COD clean water. The energy-rich substrate provides ample fuel for subsequent energy conversion, while the low-COD clean water creates excellent conditions for downstream biological treatment with low carbon-to-nitrogen ratios (such as nitrogen and phosphorus removal), significantly reducing aeration energy consumption and sludge production in subsequent processes.

[0051] Through this hierarchical enrichment strategy, this unit not only achieves comprehensive recovery of particulate and dissolved organic matter, but also lays a solid foundation for energy conservation and consumption reduction in the entire plant process while recovering energy. It is a key first step in realizing the transformation of wastewater treatment plants into energy plants.

[0052] (2) Core Directed Conversion: The directed conversion unit is the core of energy production in the entire system, responsible for converting the high-concentration organic materials enriched at the front end into a variety of high-value energy products, as detailed in (A) to (C) below:

[0053] (A) Exogenous organic waste and energy-rich substrate are transported to an anaerobic co-digestion reactor, and the temperature in the reactor is controlled within the preset optimal activity range of methanogenic bacteria. This allows for microbial degradation treatment of the exogenous organic waste and energy-rich substrate, yielding crude biogas and supernatant. In other words, this unit first treats primary sludge, adsorption concentrate, and exogenous organic waste through an anaerobic co-digestion reactor, efficiently and stably producing crude biogas, primarily composed of methane, under optimal temperature control conditions, completing the first step of energy conversion. Specifically:

[0054] 1. Input: Primary sludge (energy-rich matrix I), adsorption concentrate (energy-rich matrix II) from the enrichment unit, and external organic waste (such as kitchen waste and grease).

[0055] 2. Co-digestion: Mixing multiple wastes can effectively adjust the carbon-nitrogen ratio (C / N) of the feedstock, improve buffering capacity, and increase microbial diversity, thereby significantly improving the methane production efficiency per unit volume and system stability.

[0056] 3. Process control: Mesophilic digestion (35-38°C) is typically used, with a hydraulic retention time (HRT) of 15-25 days. Precise control of temperature, pH, and stirring speed creates an optimal environment for methanogenic bacteria.

[0057] 4. Output: Crude biogas, mainly composed of methane (55%-65%) and carbon dioxide (35%-45%), as well as small amounts of impurities (such as H2S and water vapor). The digested sludge can be used as fertilizer or soil conditioner for further resource recovery.

[0058] (B) By controlling the release of a small external voltage of a preset value in the microbial electrolysis cell, the electroactive microorganisms are driven to catalyze a reaction, degrading the supernatant after anaerobic digestion to generate high-purity hydrogen gas with a purity of 95%. In other words, to further explore potential and treat recalcitrant wastewater, the unit innovatively integrates a microbial electrolysis cell (MEC) system. The MEC utilizes a small external voltage to drive the electroactive microorganisms to catalyze a reaction, specifically treating low C / N ratio wastewater such as the supernatant after anaerobic digestion. It not only deeply removes pollutants but also directly produces high-purity hydrogen gas, opening up a new path for hydrogen energy recovery. Specifically:

[0059] 1. Input: Supernatant from anaerobic digestion (rich in ammonia nitrogen and residual COD), and a portion of low C / N ratio raw water diverted to optimize denitrification.

[0060] 2. Working Principle: Electroactive microorganisms oxidize organic matter (or ammonia nitrogen) at the anode, producing electrons and protons. Driven by a small external voltage of 0.8-1.2V (far lower than the 1.8V used in water electrolysis), electrons flow to the cathode through the external circuit, and protons migrate to the cathode chamber through the ion exchange membrane. The two combine under cathode catalysis to generate hydrogen gas. Synergistic Denitrification: Certain specialized microorganisms (such as electroactive nitrifying bacteria) can convert ammonia nitrogen to nitrate at the anode and perform denitrification at the cathode, achieving simultaneous hydrogen production and denitrification.

[0061] 3. Outputs high-purity hydrogen: purity can reach over 95%, with a value far exceeding that of biogas. Purified effluent: extremely low COD and nitrogen concentrations, allowing for direct disinfection before discharge or reuse.

[0062] (C) Using the surplus electricity generated after self-powering in a proton exchange membrane electrolyzer, pure water is electrolyzed to produce hydrogen. This hydrogen, along with carbon dioxide generated from power generation in a cogeneration unit, is fed into a catalytic methane reactor to produce natural gas. In other words, the resulting crude biogas enters the cogeneration (CHP) unit to generate electricity and heat. The electricity generated prioritizes the plant's operational needs, while the heat is used to maintain the system's process temperature. To achieve energy quality improvement and recycling, the system uses a proton exchange membrane (PEM) electrolyzer to produce more hydrogen using surplus electricity. Optionally, the hydrogen produced by the MEC and the carbon dioxide from the CHP can be fed together into a catalytic methanation reactor to synthesize high-quality biogas (Bio-SNG) that can be integrated into the pipeline network. Specifically:

[0063] 1. The components include a combined heat and power (CHP) unit: burning the crude biogas produced by anaerobic digestion to drive a generator to produce electricity and recovering waste heat from the engine to generate thermal energy. A proton exchange membrane electrolyzer: utilizing the surplus electricity generated by the CHP to electrolyze pure water to produce high-purity, high-pressure hydrogen.

[0064] 2. Energy Self-Sufficiency: The electricity and heat generated by CHP are prioritized to meet the energy consumption needs of all pumps, fans, lighting, and the system itself (such as the low voltage of MEC and reactor heating). Energy Quality Improvement: Low-grade electricity (especially surplus electricity at night) is converted into high-value, easily storable hydrogen energy.

[0065] 3. This unit forms an internal closed loop of material handling, energy flow and carbon cycle through the precise coupling of technologies such as anaerobic digestion, MEC hydrogen production, cogeneration, and catalytic methanation, realizing the targeted, efficient and diversified conversion of pollutants into various energy products such as electricity, heat, hydrogen and high-grade methane.

[0066] (3) Energy Management and Output: Real-time monitoring of energy production and consumption data during the targeted conversion of wastewater chemical potential, and intelligent scheduling based on monitoring results using AI algorithms and digital twin models built into the energy management and output unit to obtain target energy scheduling strategy. That is, using AI algorithms and digital twin models, with the goal of maximizing economic benefits, intelligent scheduling is carried out under multiple constraints for crude biogas, hydrogen, natural gas, and surplus electricity and heat energy to obtain the charging, discharging, and opening / closing control strategies of energy storage devices and external transmission interfaces corresponding to each heterogeneous energy, and the control strategy is determined as the target energy scheduling strategy.

[0067] In one implementation, the aforementioned energy management and output unit serves as the intelligent brain and energy hub of the entire system, responsible for the unified scheduling, storage, and distribution of various energy products generated at the front end, such as electricity, heat, hydrogen, and methane. This unit constructs a complete energy infrastructure by deploying energy storage facilities (lithium batteries, thermal storage tanks, hydrogen storage tanks, and gas storage tanks) and grid connection and external transmission interfaces (grid interface, heating network interface, natural gas pipeline injection, and hydrogen refueling station interface), providing hardware guarantees for the stable storage and commercial output of energy.

[0068] At its core is an Energy Management System (EMS) based on the Industrial Internet of Things (IIoT) and cloud computing. This system collects real-time data on the plant's capacity, energy consumption, and energy storage, and embeds intelligent optimization algorithms. Based on the principles of prioritizing internal use, ensuring process efficiency, and optimizing economics, the EMS dynamically decides energy flow: for example, it prioritizes using electricity from the combined heat and power (CHP) to meet the plant's needs, with surplus electricity driving the electrolyzer to produce hydrogen; it prioritizes using heat energy to maintain anaerobic digestion temperatures, storing waste heat in storage tanks or supplying it externally; and based on real-time electricity and gas prices, it intelligently chooses to sell electricity to the grid or use hydrogen to synthesize higher-value biogas.

[0069] Furthermore, the Industrial Internet of Things (IIoT) and cloud computing-based Energy Management System (EMS) serves as the intelligent brain of the entire energy plant, its core being global optimization achieved through a cloud-edge-device collaborative architecture. Sensors deployed on-site collect real-time data on various energy flows, including electricity, heat, and gas, as well as market electricity price signals. After preprocessing by edge computing nodes, this data is uploaded to the cloud data platform. The cloud utilizes built-in AI algorithms and digital twin models to solve an optimization scheduling problem under multiple constraints, aiming to maximize economic benefits. Its core objective function can be expressed as:

[0070]

[0071] By solving such optimization problems, we can dynamically determine the optimal energy allocation path, such as prioritizing electricity sales during peak electricity price periods, keeping digesters warm when there is a surplus of heat, or using hydrogen to synthesize higher-value methane.

[0072] Ultimately, through intelligent scheduling strategies, this unit achieved collaborative management, tiered utilization, and value maximization of various heterogeneous energy flows. It not only ensured a precise balance between energy supply and demand and safe and stable operation within the system, but also created a new economic benefit model for the wastewater treatment plant by selling surplus energy as a commodity, thus fully realizing the transformation from an energy consumer to a smart energy factory.

[0073] By combining multi-objective real-time optimization with a smart energy management system (EMS), dynamic adjustments are made based on real-time data (such as plant capacity, energy consumption, and energy storage status) and external signals (such as time-of-use electricity prices, hydrogen, and gas market prices) to achieve global optimization of energy self-sufficiency, economic benefits, and carbon emission reduction benefits. The scheduling strategies under typical scenarios are shown in Table 1 below:

[0074] Table 1. Scheduling Strategy Table

[0075]

[0076] In summary, this invention completely overturns the traditional mode of consuming organic matter through aeration by using a two-stage enrichment process of efficient primary sedimentation and adsorption concentration. It comprehensively captures both soluble and particulate organic matter, and by coupling MEC hydrogen production and anaerobic methanogenesis, it achieves the directional and fractional conversion of chemical potential into hydrogen energy and methane, thus overcoming the problem of the difficulty in recovering soluble organic matter.

[0077] Furthermore, through system integration, this invention synthesizes high-purity methane (Sabatier reaction) by combining green hydrogen generated from MEC with carbon dioxide produced from anaerobic digestion in a catalytic reactor. This achieves closed-loop recycling and value-added utilization of carbon elements within the system, significantly reducing carbon emissions while producing high-quality renewable natural gas that can be directly integrated into the pipeline network.

[0078] This invention also constructs a cloud-edge-device collaborative intelligent EMS, which solves multi-objective optimization models in real time through AI algorithms, dynamically coordinates the production, storage, use, and sale of various heterogeneous energy sources such as electricity, heat, hydrogen, and gas, and for the first time realizes full-domain intelligent scheduling and real-time value maximization of the energy system at the sewage treatment plant level.

[0079] Regarding the directional conversion method for wastewater chemical potential provided in the foregoing embodiments, this invention provides a directional conversion device for wastewater chemical potential, see [link to relevant documentation]. Figure 3 The diagram shows a structural schematic of a device for the directional conversion of the chemical potential of wastewater. The device includes the following parts:

[0080] The chemical potential enrichment module 302 performs chemical potential enrichment treatment on the influent COD to obtain an energy-rich matrix, which includes: energy-rich sludge and adsorbent concentrate.

[0081] The directional conversion module 304 uses a directional conversion unit to perform temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and energy-rich substrate to obtain crude biogas and supernatant. The supernatant is then degraded through a microbial electrolysis cell to generate hydrogen.

[0082] The energy management module 306 utilizes crude biogas for power generation and heat recovery through a combined heat and power unit to achieve self-sufficiency. The energy management and output unit intelligently schedules crude biogas, hydrogen, and the remaining electrical and thermal energy after self-sufficiency to obtain a target energy scheduling strategy. Based on the target energy scheduling strategy, it performs coordinated management of various heterogeneous energy sources after directional conversion.

[0083] The wastewater chemical potential directional conversion device provided in this application embodiment can significantly improve the overall wastewater recovery rate.

[0084] In one embodiment, during the step of performing chemical potential enrichment treatment on the influent COD to obtain an energy-rich matrix, the aforementioned chemical potential enrichment module 302 is further configured to: perform primary enrichment treatment on the influent COD through a high-efficiency primary sedimentation tank to obtain energy-rich sludge and effluent, and perform secondary enrichment treatment on the effluent using an adsorption and concentration reactor to adsorb and concentrate the effluent to obtain an adsorbent concentrate, thereby using the energy-rich sludge and adsorbent concentrate as the energy-rich matrix.

[0085] In one embodiment, during the step of performing temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and energy-rich substrate through a directional conversion unit to obtain crude biogas and supernatant, the aforementioned directional conversion module 304 is further configured to: transport exogenous organic waste and energy-rich substrate to an anaerobic co-digestion reactor, and control the temperature in the anaerobic co-digestion reactor within the preset optimal activity temperature range of methanogens, so as to perform microbial degradation treatment on exogenous organic waste and energy-rich substrate to obtain crude biogas and supernatant.

[0086] In one embodiment, during the step of degrading the supernatant through a microbial electrolysis cell to generate hydrogen, the directional conversion module 304 is further configured to: drive the electroactive microorganisms to catalyze the reaction by controlling the microbial electrolysis cell to release a small external voltage of a preset voltage value, thereby degrading the anaerobic digested supernatant to generate high-purity hydrogen with a purity of 95%.

[0087] In one embodiment, after performing the steps of generating electricity and recovering heat using crude biogas through a cogeneration unit to achieve self-sufficiency, the energy management module 306 is further configured to: electrolyze pure water using the remaining electrical energy after self-sufficiency through a proton exchange membrane electrolyzer to obtain hydrogen generated by electrolysis, and input the hydrogen generated by electrolysis and the carbon dioxide generated by the cogeneration unit into a catalytic methane reactor to obtain natural gas.

[0088] In one embodiment, when performing the step of intelligently scheduling and processing the crude biogas, hydrogen, and residual electrical and thermal energy after self-powered energy supply through the energy management and output unit to obtain the target energy scheduling strategy, the energy management module 306 is also used to: monitor the energy production and consumption data in the targeted conversion process of wastewater chemical potential in real time, and perform intelligent scheduling and processing based on the monitoring results through the AI ​​algorithm and digital twin model built into the energy management and output unit to obtain the target energy scheduling strategy.

[0089] In one embodiment, when performing the step of intelligent scheduling based on monitoring results using the AI ​​algorithm and digital twin model built into the energy management and output unit to obtain the target energy scheduling strategy, the energy management module 306 is further configured to: use the AI ​​algorithm and digital twin model, with the maximization of economic benefits as the objective function, perform intelligent scheduling under multiple constraints for crude biogas, hydrogen, natural gas, and surplus electrical and thermal energy, obtain the charging, discharging, and opening / closing control strategies of the energy storage devices corresponding to each heterogeneous energy source, and determine the control strategies as the target energy scheduling strategy.

[0090] The device provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0091] This invention provides a server, specifically, the server includes a processor and a storage device; the storage device stores a computer program, which, when run by the processor, executes the method described in any of the above embodiments.

[0092] Figure 4 This is a schematic diagram of the structure of a server provided in an embodiment of the present invention. The server 100 includes: a processor 40, a memory 41, a bus 42 and a communication interface 43. The processor 40, the communication interface 43 and the memory 41 are connected through the bus 42. The processor 40 is used to execute executable modules, such as computer programs, stored in the memory 41.

[0093] The memory 41 may include high-speed random access memory (RAM) or non-volatile memory, such as at least one disk storage device. Communication between this system network element and at least one other network element is achieved through at least one communication interface 43 (which can be wired or wireless), such as the Internet, wide area network, local area network, metropolitan area network, etc.

[0094] Bus 42 can be an ISA bus, PCI bus, or EISA bus, etc. The bus can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 4 The symbol is represented by a single double-headed arrow, but this does not mean that there is only one bus or one type of bus.

[0095] The memory 41 is used to store programs. After receiving an execution instruction, the processor 40 executes the program. The method executed by the device for defining the flow process disclosed in any of the foregoing embodiments of the present invention can be applied to the processor 40 or implemented by the processor 40.

[0096] Processor 40 may be an integrated circuit chip with signal processing capabilities. In implementation, each step of the above method can be completed by the integrated logic circuitry in the hardware of processor 40 or by instructions in software form. Processor 40 can be a general-purpose processor, including a Central Processing Unit (CPU), a Network Processor (NP), etc.; it can also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable Gate Array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this invention. The general-purpose processor can be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this invention can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software modules in the decoding processor. The software modules can reside in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 41. The processor 40 reads the information in memory 41 and, in conjunction with its hardware, completes the steps of the above method.

[0097] The computer program product of the readable storage medium provided in the embodiments of the present invention includes a computer-readable storage medium storing program code. The instructions included in the program code can be used to execute the methods described in the foregoing method embodiments. For specific implementation, please refer to the foregoing method embodiments, which will not be repeated here.

[0098] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this invention, essentially, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0099] Finally, it should be noted that the above-described embodiments are merely specific implementations of the present invention, used to illustrate the technical solutions of the present invention, and not to limit it. The scope of protection of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention, or make equivalent substitutions for some of the technical features; and these modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for the targeted conversion of chemical potential in wastewater, characterized in that, The method includes: Chemical potential enrichment treatment is performed on the COD of the influent to obtain an energy-rich matrix, wherein the energy-rich matrix includes: energy-rich sludge and adsorbent concentrate. The exogenous organic waste and the energy-rich substrate are subjected to temperature-controlled treatment and microbial degradation treatment through a directional conversion unit to obtain crude biogas and supernatant. The supernatant is then degraded through a microbial electrolysis cell to generate hydrogen. Through a combined heat and power unit, the crude biogas is used for power generation and heat recovery to achieve self-sufficiency. The crude biogas, hydrogen, and the remaining electrical and thermal energy after self-sufficiency are intelligently scheduled through an energy management and output unit to obtain a target energy scheduling strategy. Based on the target energy scheduling strategy, the coordinated management of various heterogeneous energy sources after directional conversion is carried out. The step of performing chemical potential enrichment treatment on influent COD to obtain an energy-rich matrix includes: performing primary enrichment treatment on the influent COD through a high-efficiency primary sedimentation tank to obtain energy-rich sludge and effluent, and performing secondary enrichment treatment on the effluent using an adsorption and concentration reactor to adsorb and concentrate the effluent to obtain the adsorbent concentrate, with the energy-rich sludge and the adsorbent concentrate used as the energy-rich matrix. The step of performing temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and the energy-rich substrate through a directional conversion unit to obtain crude biogas and supernatant includes: transporting the exogenous organic waste and the energy-rich substrate to an anaerobic co-digestion reactor, and controlling the temperature in the anaerobic co-digestion reactor within the preset optimal activity temperature range of methanogens, so as to perform microbial degradation treatment on the exogenous organic waste and the energy-rich substrate to obtain crude biogas and supernatant; The step of degrading the supernatant to generate hydrogen gas by means of a microbial electrolysis cell includes: controlling the microbial electrolysis cell to release a small external voltage of a preset voltage value to drive the electroactive microorganisms to catalyze the reaction, so as to degrade the supernatant after anaerobic digestion and generate high-purity hydrogen gas with a purity of 95%. The process includes, after the step of using the crude biogas for power generation and heat recovery through a cogeneration unit to achieve self-powered operation, the following steps are taken: using the remaining electrical energy after self-powered operation to electrolyze pure water through a proton exchange membrane electrolyzer to obtain electrolyzed hydrogen, and then feeding the electrolyzed hydrogen and the carbon dioxide generated by the cogeneration unit into a catalytic methane reactor to obtain natural gas. The step of intelligently scheduling the crude biogas, hydrogen, and residual electrical and thermal energy after self-powered energy supply through the energy management and output unit to obtain the target energy scheduling strategy includes: real-time monitoring of energy production and consumption data during the directional conversion process of wastewater chemical potential, and intelligent scheduling based on the monitoring results using the AI ​​algorithm and digital twin model built into the energy management and output unit to obtain the target energy scheduling strategy. The step of obtaining the target energy scheduling strategy by performing intelligent scheduling processing based on monitoring results using the AI ​​algorithm and digital twin model built into the energy management and output unit includes: using the AI ​​algorithm and the digital twin model, with maximizing economic benefits as the objective function, performing intelligent scheduling processing under multiple constraints for the crude biogas, the hydrogen, the natural gas, and the remaining electrical and thermal energy, obtaining the charging, discharging, and opening / closing control strategies of the energy storage devices corresponding to each heterogeneous energy source, and determining the control strategies as the target energy scheduling strategy.

2. A device for the directional conversion of the chemical potential of wastewater, characterized in that, The device includes: A chemical potential enrichment module is used to perform chemical potential enrichment treatment on influent COD to obtain an energy-rich matrix, wherein the energy-rich matrix includes: energy-rich sludge and adsorbent concentrate. The targeted conversion module uses a targeted conversion unit to perform temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and the energy-rich substrate to obtain crude biogas and supernatant. The supernatant is then degraded by a microbial electrolysis cell to generate hydrogen. The energy management module utilizes the crude biogas for power generation and heat recovery through a cogeneration unit to achieve self-sufficiency. The energy management and output unit intelligently schedules the crude biogas, hydrogen, and the remaining electrical and thermal energy after self-sufficiency to obtain a target energy scheduling strategy. Based on the target energy scheduling strategy, the module performs coordinated management of various heterogeneous energy sources after directional conversion. The step of performing chemical potential enrichment treatment on influent COD to obtain an energy-rich matrix includes: performing primary enrichment treatment on the influent COD through a high-efficiency primary sedimentation tank to obtain energy-rich sludge and effluent, and performing secondary enrichment treatment on the effluent using an adsorption and concentration reactor to adsorb and concentrate the effluent to obtain the adsorbent concentrate, with the energy-rich sludge and the adsorbent concentrate used as the energy-rich matrix. The step of performing temperature-controlled treatment and microbial degradation treatment on exogenous organic waste and the energy-rich substrate through a directional conversion unit to obtain crude biogas and supernatant includes: transporting the exogenous organic waste and the energy-rich substrate to an anaerobic co-digestion reactor, and controlling the temperature in the anaerobic co-digestion reactor within the preset optimal activity temperature range of methanogens, so as to perform microbial degradation treatment on the exogenous organic waste and the energy-rich substrate to obtain crude biogas and supernatant; The step of degrading the supernatant to generate hydrogen gas by means of a microbial electrolysis cell includes: controlling the microbial electrolysis cell to release a small external voltage of a preset voltage value to drive the electroactive microorganisms to catalyze the reaction, so as to degrade the supernatant after anaerobic digestion and generate high-purity hydrogen gas with a purity of 95%. The process includes, after the step of using the crude biogas for power generation and heat recovery through a cogeneration unit to achieve self-powered operation, the following steps are taken: using the remaining electrical energy after self-powered operation to electrolyze pure water through a proton exchange membrane electrolyzer to obtain electrolyzed hydrogen, and then feeding the electrolyzed hydrogen and the carbon dioxide generated by the cogeneration unit into a catalytic methane reactor to obtain natural gas. The step of intelligently scheduling the crude biogas, hydrogen, and residual electrical and thermal energy after self-powered energy supply through the energy management and output unit to obtain the target energy scheduling strategy includes: real-time monitoring of energy production and consumption data during the directional conversion process of wastewater chemical potential, and intelligent scheduling based on the monitoring results using the AI ​​algorithm and digital twin model built into the energy management and output unit to obtain the target energy scheduling strategy. The step of obtaining the target energy scheduling strategy by performing intelligent scheduling processing based on monitoring results using the AI ​​algorithm and digital twin model built into the energy management and output unit includes: using the AI ​​algorithm and the digital twin model, with maximizing economic benefits as the objective function, performing intelligent scheduling processing under multiple constraints for the crude biogas, the hydrogen, the natural gas, and the remaining electrical and thermal energy, obtaining the charging, discharging, and opening / closing control strategies of the energy storage devices corresponding to each heterogeneous energy source, and determining the control strategies as the target energy scheduling strategy.

3. A server, characterized in that, The method includes a processor and a memory, the memory storing computer-executable instructions that can be executed by the processor, the processor executing the computer-executable instructions to implement the method of claim 1.

4. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions that, when invoked and executed by a processor, cause the processor to implement the method of claim 1.

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