Multi-source biological fermentation wastewater treatment method, system and equipment and storage medium

Abstract

The invention discloses a multi-source biological fermentation wastewater treatment method, system and equipment and a storage medium, and relates to the technical field of environmental engineering and wastewater treatment.The method comprises the steps that biological fermentation wastewater with different concentrations is collected to corresponding collecting pools, and water quality parameters of the collecting pools are monitored in real time; according to the monitored water quality parameters, the mixing proportion of the biological fermentation wastewater with all the concentrations is adjusted according to a preset proportion through an automatic control system, and the pH value of the mixed biological fermentation wastewater is adjusted; pumping the adjusted wastewater into a unitized anaerobic reactor for multilayer biological anaerobic treatment; the effluent subjected to anaerobic treatment sequentially passes through an A / O system and an aerobic biochemical system to be subjected to carbon-nitrogen synergistic degradation and mud-water separation. The method disclosed by the invention has the beneficial effects that the biological fermentation wastewater with different concentrations is efficiently and cooperatively treated, the effluent quality is improved, the energy consumption is reduced, and sludge recycling and stable operation of the system are realized.

Description

Technical Field

[0001] This invention relates to the field of environmental engineering and wastewater treatment technology, specifically to a method, system, equipment, and storage medium for treating multi-source biological fermentation wastewater. Background Technology

[0002] Currently, for high-concentration organic wastewater generated during bio-fermentation processes, the industry generally adopts an anaerobic-aerobic treatment process as its core. In the anaerobic treatment stage, upflow anaerobic sludge bed reactors and their improved internal circulation reactors are the mainstream technologies that are widely used. By cultivating granular sludge, most of the organic matter is decomposed into biogas by microbial communities under anaerobic conditions. The effluent after anaerobic treatment usually enters the aerobic stage, such as biological contact oxidation or A / O process. Through aeration, oxygen is supplied, and aerobic microorganisms are used to further degrade the remaining organic matter and achieve nitrogen and phosphorus removal. The entire treatment system relies on a series of structures and mechanical equipment, and is monitored and controlled by basic instruments.

[0003] Biological fermentation wastewater typically consists of multiple water sources, including distillation residue, centrifugal wastewater, and washing wastewater. These sources vary significantly in concentration and discharge patterns. Existing equalization tanks often only provide uniform energy supply, failing to effectively balance water quality. This leads to drastic fluctuations in the wastewater load entering the biological system, easily impacting microorganisms and causing system instability. Traditional anaerobic reactors such as UASB generally suffer from limited biological solids retention capacity, suboptimal hydraulic flow patterns, and weak resistance to shock loads when treating such complex wastewater. This results in COD removal efficiency falling short of design expectations, becoming a bottleneck in the entire treatment process. If the subsequent aerobic treatment unit is poorly designed, it is difficult to achieve synergistic and efficient removal of residual organic matter and ammonia nitrogen from the anaerobic effluent. Furthermore, the sludge treatment and disposal costs of the entire system are high, operation and management rely heavily on manual experience, automation is low, and it is difficult to guarantee long-term stable compliance with emission standards.

[0004] Therefore, there is an urgent need in this field for an innovative wastewater treatment technology that can effectively solve the problem of uneven water quality and quantity from multiple wastewater sources, possess stronger anaerobic treatment efficiency and shock resistance, achieve deep and synergistic removal of carbon and nitrogen in the aerobic stage, integrate highly automated control and sludge resource utilization, and construct a complete treatment system that can operate stably, efficiently, and at low cost for a long time. Summary of the Invention

[0005] In view of the above-mentioned problems, the present invention is proposed.

[0006] Therefore, the technical problem solved by this invention is that existing biological fermentation wastewater treatment methods suffer from the following problems: the biochemical system is susceptible to shocks, the removal efficiency of high-concentration organic matter is low, the operation is unstable, and there is a question of how to achieve long-term stable operation to meet standards and reduce sludge treatment costs.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a multi-source biological fermentation wastewater treatment method, comprising collecting biological fermentation wastewater of different COD concentrations into corresponding collection tanks and monitoring the water quality parameters of each collection tank in real time; adjusting the mixing ratio of biological fermentation wastewater of different concentrations according to the monitored water quality parameters through a PLC control system according to a preset ratio, and adjusting the pH value of the mixed biological fermentation wastewater; pumping the adjusted wastewater into a unitized anaerobic reactor for multi-layer biological anaerobic treatment; and sequentially passing the effluent after anaerobic treatment through an A / O and aerobic biochemical system for carbon and nitrogen co-degradation and sludge-water separation.

[0008] As a preferred embodiment of the multi-source biological fermentation wastewater treatment method of the present invention, the biological fermentation wastewater of different concentrations is collected in the corresponding collection tanks by dividing it into three levels according to the COD concentration of the biological fermentation wastewater, including ultra-high concentration wastewater, high concentration wastewater and low concentration wastewater; ultra-high concentration wastewater is stored in a special collection tank made of corrosion-resistant material, high concentration wastewater is stored in a reinforced concrete regulating tank, and low concentration wastewater enters the collection tank after large particulate suspended solids are removed by a bar screen channel.

[0009] As a preferred embodiment of the multi-source biological fermentation wastewater treatment method of the present invention, the method of adjusting the pH value of the mixed biological fermentation wastewater includes: controlling the flow rate by adjusting the opening and closing degree of the electric regulating valve installed on various wastewater pipelines; simultaneously mixing the wastewater evenly by a stirrer; and using an automatic pH adjustment system to maintain pH stability by outputting the acid and alkali dosage based on the real-time pH monitoring value and through a PID control algorithm.

[0010] As a preferred embodiment of the multi-source biological fermentation wastewater treatment method of the present invention, the process of pumping the adjusted wastewater into a unitized anaerobic reactor for multi-layer biological anaerobic treatment includes controlling the hydraulic retention time (HRT) by adjusting the frequency of the influent booster pump, maintaining a stable reactor temperature, maintaining the temperature through the tank insulation layer and the built-in hot water circulation system, and automatically adjusting the circulation flow rate according to the temperature monitoring value.

[0011] As a preferred embodiment of the multi-source biological fermentation wastewater treatment method of the present invention, the unitized anaerobic reactor comprises a parallel unitized structure, with a three-layer combined packing system inside the reactor, including a bottom high-load biodegradation layer, a middle biofilm enhancement treatment layer, and an upper fine treatment and sludge retention layer; the bottom high-load biodegradation layer is filled with elastic three-dimensional packing material, where large molecular organic matter in the wastewater is decomposed into small molecular organic acids under the action of anaerobic microorganisms; the middle biofilm enhancement treatment layer uses polypropylene biological rope packing material, where acetic acid bacteria further convert the small molecular organic acids flowing in from the bottom layer; the upper fine treatment and sludge retention layer contains suspended biological balls with activated carbon adsorption medium, which adsorb incompletely degraded trace organic matter and effectively retain anaerobic sludge particles rising with the water flow.

[0012] As a preferred embodiment of the multi-source biological fermentation wastewater treatment method of the present invention, the carbon and nitrogen synergistic degradation and sludge-water separation through the A / O and aerobic biochemical system includes: a hydraulic retention time of the pre-anoxic section and a hydraulic retention time of the post-aerobic section in the A / O process; a submersible mixer is installed in the anoxic section; microporous aeration discs are used for aeration in the aerobic section; and the blower frequency is adjusted by online monitoring and feedback of dissolved oxygen. The aerobic tank adopts a biological contact oxidation process, and the tank is filled with combined packing material. The air-to-water ratio is maintained by adjusting the operating frequency of the Roots blower.

[0013] As a preferred embodiment of the multi-source biological fermentation wastewater treatment method of the present invention, the step of carbon and nitrogen synergistic degradation and sludge-water separation through A / O and aerobic biochemical system includes: real-time monitoring of mixed liquor sludge concentration; automatic start and stop of sludge discharge pump based on the total amount of sludge in the system and the daily sludge discharge output; setting up a turbidity monitor; and triggering system alarm and initiating emergency response procedures based on monitoring data.

[0014] Another objective of this invention is to provide a multi-source biological fermentation wastewater treatment system that can perform multi-layer biological anaerobic treatment by pumping the regulated wastewater into a unitized anaerobic reactor, thereby solving the problem of low removal efficiency for high-concentration organic matter in current biological fermentation wastewater treatment technologies.

[0015] As a preferred embodiment of the multi-source biological fermentation wastewater treatment system of the present invention, it includes: a wastewater collection and regulation module, an anaerobic treatment module, and an aerobic treatment and sludge-water separation module; the wastewater collection and regulation module is used to introduce biological fermentation wastewater from different sources into corresponding collection tanks according to preset COD concentration levels, and monitor the water quality parameters of the effluent in the collection tanks in real time, and adjust the wastewater according to the real-time water quality data to maintain a stable pH value; the anaerobic treatment module is used to perform anaerobic treatment on the mixed wastewater, and to carry out anaerobic reactions through a unitized anaerobic reactor, controlling the hydraulic retention time by the frequency of the influent booster pump, maintaining the tank temperature, and automatically adjusting the influent flow rate; the aerobic treatment and sludge-water separation module is used to perform carbon and nitrogen co-degradation on the anaerobic effluent, maintain the solid-liquid separation and biomass balance of the mixed liquid, and consists of an A / O and an aerobic biochemical system connected in series to form the aerobic treatment, and automatically controlling the sludge return pump through sludge concentration monitoring.

[0016] Another object of the present invention is to provide a multi-source biological fermentation wastewater treatment device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement the steps of the multi-source biological fermentation wastewater treatment method.

[0017] Another object of the present invention is to provide a storage medium for treating multi-source biological fermentation wastewater, wherein a computer program is stored thereon, and when the computer program is executed by a processor, the steps of the multi-source biological fermentation wastewater treatment method are implemented.

[0018] The beneficial effects of this invention are: This invention provides a multi-source biological fermentation wastewater treatment method that collects biological fermentation wastewater with different COD concentrations into corresponding collection tanks and monitors the water quality parameters of each collection tank in real time. This enables precise perception and source-specific management of multi-source wastewater, laying the foundation for subsequent stable treatment. Based on the monitored water quality parameters, the PLC control system adjusts the mixing ratio of biological fermentation wastewater of different concentrations according to a preset ratio and adjusts the pH value of the mixed biological fermentation wastewater to construct a balanced influent condition with shock resistance, effectively avoiding the inhibition and impact of water quality fluctuations on the biological system. The adjusted wastewater is pumped into a unitized anaerobic reactor for multi-layer biological anaerobic treatment. Through a unique structure and packing system, the biological interception capacity and mass transfer efficiency are greatly improved, significantly increasing the removal rate and treatment load of high-concentration organic pollutants. Based on the effluent after anaerobic treatment, carbon and nitrogen are synergistically degraded and sludge-water separated by an A / O and aerobic biological system, achieving deep removal of recalcitrant organic matter and ammonia nitrogen, ensuring that the effluent water quality fully and stably meets the standards. This invention achieves better results in terms of treatment efficiency, system stability, and economic operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is an overall flow chart of a multi-source biological fermentation wastewater treatment method provided in Embodiment 1 of the present invention.

[0021] Figure 2 This is a diagram of the wastewater treatment automatic control system of a multi-source biological fermentation wastewater treatment method provided in Embodiment 1 of the present invention. Detailed Implementation

[0022] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0023] Example 1, referring to Figures 1-2 As an embodiment of the present invention, a method for treating multi-source biological fermentation wastewater is provided, comprising: S1: Collect bio-fermentation wastewater with different COD concentrations into the corresponding collection tanks, and monitor the water quality parameters of each collection tank in real time.

[0024] Specifically, the collection tanks for biological fermentation wastewater of different concentrations are divided into three levels according to the COD concentration of the wastewater: ultra-high concentration wastewater, high concentration wastewater, and low concentration wastewater. Ultra-high concentration wastewater is stored in a special collection tank made of corrosion-resistant material, high concentration wastewater is stored in a reinforced concrete equalization tank, and low concentration wastewater enters the collection tank 100 after large particulate suspended solids are removed by a bar screen channel.

[0025] It should be noted that a three-tiered classification standard is established based on the COD concentration of wastewater: distillation column wastewater with a COD concentration of ≥10000 mg / L is classified as ultra-high concentration wastewater and is transported to a dedicated corrosion-resistant HDPE collection tank for storage; centrifuge wastewater with a COD concentration in the range of 4000 to 6000 mg / L is classified as high concentration wastewater and is transported to a reinforced concrete equalization tank for storage; ordinary industrial wastewater, cleaning wastewater, and domestic sewage with a COD concentration of ≤2000 mg / L are classified as low concentration wastewater and are transported by gravity to the collection tank 100 after being intercepted and larger suspended solids are removed by the screen in the screen channel.

[0026] To achieve precise allocation, it is necessary to monitor and sense the key water quality parameters of various wastewaters in real time. An online water quality monitor is installed at the inlet of the equalization tank 200. This monitor integrates a COD sensor, a pH sensor, and a temperature sensor. The COD sensor uses the ultraviolet absorption method to measure the COD, covering the measurement needs of ultra-high concentration wastewater. The pH sensor uses the glass electrode method to monitor the acidity and alkalinity of the influent in real time. The temperature sensor uses a platinum resistance thermometer to monitor the influent temperature in real time. The monitored real-time parameters are continuously transmitted to the PLC control system.

[0027] It should also be noted that by establishing COD concentration levels for wastewater classification and collection and multi-sensor online monitoring, precise classification, storage and real-time monitoring of fermentation wastewater of different concentrations can be achieved. This solves the problem of high corrosiveness and high concentration wastewater being difficult to treat and the difficulty of dynamic control using traditional methods. It also achieves the effect of precisely adjusting the influent according to a preset ratio, effectively improving treatment efficiency and reducing operating costs.

[0028] S2: Based on the monitored water quality parameters, the PLC control system adjusts the mixing ratio of biological fermentation wastewater of various concentrations according to the preset ratio, and adjusts the pH value of the mixed biological fermentation wastewater.

[0029] Specifically, adjusting the pH value of the mixed biological fermentation wastewater includes controlling the flow rate by adjusting the opening and closing of electric regulating valves installed on various wastewater pipelines, mixing the wastewater evenly with a stirrer, and using an automatic pH adjustment system to output the acid and alkali dosage based on real-time pH monitoring values ​​through a PID control algorithm to maintain a stable pH value.

[0030] It should be noted that the PLC control system adjusts the wastewater according to a preset ratio based on real-time monitored COD concentration data. The wastewater is mixed in a preset volume ratio of 1:2:7 (high concentration: high concentration: low concentration). The instantaneous flow rate of each type of wastewater is precisely controlled by automatically adjusting the opening and closing of electric regulating valves on various pipelines. The adjusted wastewater enters the equalization tank 200. Several submersible agitators are installed at the bottom of the equalization tank 200 to avoid dead zones or concentration stratification, ensuring thorough and uniform mixing. Simultaneously, the system feeds back the real-time pH value of the tank to the PLC control system via a pH sensor. A PID algorithm is used to dynamically adjust the acid and alkali dosage. When the pH is greater than 7.5, the acid dosing pump automatically starts; when the pH is less than 6.8, the alkali dosing pump automatically starts, ensuring that the pH of the effluent from the equalization tank 200 remains stable within the range of 6.8 to 7.5. The acid and alkali dosage calculation is expressed as follows: , in, This refers to the amount of acid and alkali added. The proportionality constant is set to 0.8. This refers to the inlet water flow rate. For adjusting the cycle.

[0031] It should also be noted that by integrating electric regulating valves, agitators, and automatic pH adjustment systems through the PLC control system, based on real-time monitoring data and PID algorithms, the system can accurately and automatically adjust wastewater of different concentrations according to preset ratios and maintain stable pH control. This solves the problems of poor accuracy, uneven mixing, and large pH fluctuations in the traditional manual mixing process, thereby improving the homogenization of wastewater.

[0032] S3: The adjusted wastewater is pumped into the unitized anaerobic reactor 300 for multi-layer biological anaerobic treatment.

[0033] Specifically, the adjusted wastewater is pumped into the unitized anaerobic reactor 300 for multi-layer biological anaerobic treatment, including controlling the hydraulic retention time (HRT) by adjusting the frequency of the influent booster pump, maintaining a stable reactor temperature, maintaining the temperature through the tank insulation layer and the built-in hot water circulation system, and automatically adjusting the circulation flow rate according to the temperature monitoring value.

[0034] The modular anaerobic reactor 300 comprises a parallel modular structure with a three-layer combined packing system: a bottom high-load biodegradation layer, a middle biofilm enhancement treatment layer, and an upper fine treatment and sludge retention layer. The bottom high-load biodegradation layer is filled with elastic three-dimensional packing material, where large molecular organic matter in the wastewater is decomposed into small molecular organic acids by anaerobic microorganisms. The middle biofilm enhancement treatment layer uses polypropylene biological rope packing material, where acetic acid bacteria further convert the small molecular organic acids flowing in from the bottom layer. The upper fine treatment and sludge retention layer contains suspended biological balls with activated carbon adsorption medium, which adsorb incompletely degraded trace organic matter and effectively retain anaerobic sludge particles rising with the water flow.

[0035] It should be noted that the adjusted wastewater is precisely pumped into the anaerobic reactor 300 by a wastewater lift pump. To avoid flow interruptions or dead zones, the wastewater first enters a branched ring pipe water distribution system. This system uses corrosion-resistant UPVC material to ensure that the wastewater is distributed to the bottom of the entire reactor at a uniform upward flow rate. The wastewater flows from bottom to top through the anaerobic reactor 300, which employs a six-unit parallel modular structure. The modular design enhances the system's treatment capacity and operational flexibility, while also facilitating group inspection and maintenance, ensuring continuous operation. Inside the reactor, there is a three-layer combined packing system, including a bottom high-load biodegradation layer, a middle biofilm enhanced treatment layer, and an upper fine treatment and sludge retention layer. The bottom high-load biodegradation layer is filled with elastic three-dimensional packing material, and its large surface area provides a large surface area for anaerobic digestion. Oxygen-rich microorganisms provide abundant attachment sites, allowing large molecules and complex organic matter in wastewater to be adsorbed and decomposed into small-molecule organic acids by a large number of hydrolytic and acidifying bacteria in this layer, completing the primary transformation and degradation of pollutants. The middle layer of biofilm enhancement treatment uses polypropylene biological rope packing, whose high surface area further enriches various anaerobic microorganisms. In this layer, small-molecule organic acids flowing in from the bottom layer are further transformed. The upper layer of fine treatment and sludge interception layer contains suspended biospheres with activated carbon adsorption medium. This layer has a dual function: on the one hand, the activated carbon component physically adsorbs and deeply purifies the trace dissolved organic matter that was not completely degraded in the first two stages; on the other hand, the physical interception effect of the biospheres can effectively capture the fine anaerobic sludge particles rising with the water flow, preventing the loss of valuable biomass.

[0036] It should also be noted that, to ensure the anaerobic reactor 300 is in optimal metabolic activity and that the influent is evenly distributed to the bottom of the reactor, the hydraulic retention time of the wastewater inside the reactor is controlled to be 40-48 hours by adjusting the operating frequency of the influent lift pump, ensuring sufficient contact and reaction time between pollutants and microorganisms. Because anaerobic microorganisms are extremely sensitive to temperature, the internal temperature is maintained at 35±2℃ through the reactor's insulation layer and internal stainless steel coil hot water circulation system. During colder winter months, the system can automatically adjust based on temperature sensor feedback to ensure the temperature is strictly maintained at a specific level. The organic load value is calculated and stabilized within the range of 8-10 kgCOD / m³·d by real-time monitoring of the influent flow rate and COD concentration. When the organic load value deviates from this range, the PLC system automatically adjusts the influent flow rate to prevent efficiency loss due to overload or underload. The organic load value is expressed as: , in, This is the organic load value. This refers to the inlet water flow rate. The influent concentration is... This is the effective volume of the reactor.

[0037] When the organic load value is less than 8 kg COD / m³·d, the water inflow is automatically increased; when the organic load value is greater than 10 kg COD / m³·d, the water inflow is automatically reduced. A biogas recovery system is then set up. The biogas is initially purified and pressure stabilized in a water seal tank and then transported to the boiler room in the plant area for recycling as auxiliary fuel. In addition, by regularly monitoring the sludge settling ratio in the reactor, sludge discharge or replenishment operations are automatically performed to maintain the stability of the biological phase.

[0038] It should also be noted that by adopting the modular anaerobic reactor 300 and its three-layer combined packing system, integrated control, constant temperature and automatic regulation of organic load are achieved, realizing the efficient and stable degradation of high-concentration organic wastewater. This solves the problems of low efficiency, easy sludge loss and unstable operation of traditional anaerobic treatment, thereby improving COD removal rate, biogas recovery and ensuring long-term stable operation of the system.

[0039] S4: The effluent after anaerobic treatment is sequentially passed through the A / O and aerobic biological system 400 for carbon and nitrogen co-degradation and mud-water separation.

[0040] Specifically, the carbon and nitrogen synergistic degradation and sludge-water separation through the A / O and aerobic biological system 400 includes the hydraulic retention time of the pre-anoxic section and the post-aerobic section of the A / O process. The anoxic section is equipped with a submersible mixer, and the aerobic section uses microporous aeration discs for aeration. The blower frequency is adjusted based on online dissolved oxygen monitoring feedback. The aerobic tank adopts a biological contact oxidation process, and the tank is filled with combined packing material. The air-to-water ratio is maintained by adjusting the operating frequency of the Roots blower.

[0041] The anaerobic effluent first employs an A / O process to achieve synergistic removal of carbon and nitrogen. During the anoxic stage, the sludge is kept suspended by the continuous operation of a submersible mixer. Organic matter in the returned mixed liquor utilizes the organic matter in the influent as a carbon source, reducing it to nitrogen and being discharged from the system, maintaining a hydraulic retention time of 4 hours. In the subsequent aerobic stage, efficient aeration is achieved through microporous aeration discs, further degrading residual organic matter, maintaining a hydraulic retention time of 12 hours. Dissolved oxygen is monitored in real time by an online monitoring instrument, which adjusts the operating frequency of the Roots blower. Subsequently, the wastewater enters the aerobic tank, which employs a biological contact oxidation process, providing a large surface area for the growth of aerobic microorganisms. Aeration is achieved through Roots blowers, precisely controlling the air-to-water ratio at 8:1 to ensure sufficient dissolved oxygen supply. The biofilm attached to the packing material rapidly adsorbs and oxidizes the remaining organic matter in the wastewater, reducing the BOD concentration.

[0042] To ensure the sedimentation effect of the secondary sedimentation tank 500, an aeration zone is set up at the end of the aerobic tank to reduce or stop aeration and prevent air bubbles from carrying sludge to the surface, affecting the effluent quality. The effluent from the aerobic system then enters the secondary sedimentation tank 500 for sludge-water separation, using a radial flow structure. The clarified supernatant is used as the final effluent that meets the standards for discharge. The sludge concentration of the mixed liquor is monitored in real time by a sludge concentration meter, and the sludge return pump is automatically controlled. Sludge discharge is controlled according to the total amount of sludge in the system and the daily sludge discharge volume to maintain the high activity and stability of the microbial population. A turbidity monitor is installed at the outlet of the secondary sedimentation tank 500 for final water quality monitoring. If the effluent turbidity is higher than 10 NTU for 2 consecutive hours, the system triggers an alarm and initiates emergency treatment to ensure that the effluent meets the discharge standards.

[0043] It should be noted that the carbon and nitrogen co-degradation and sludge-water separation through the A / O and aerobic biological system 400 includes real-time monitoring of the mixed liquor sludge concentration, automatic start and stop of the sludge discharge pump based on the total amount of sludge in the system and the daily sludge discharge output, setting up a turbidity monitor, triggering system alarms and initiating emergency response procedures based on the monitoring data.

[0044] The excess sludge from the secondary sedimentation tank (500 m³) and the anaerobic reactor (300 m³) is transferred to a sludge thickening tank for gravity thickening. The thickened sludge is then transported to a conditioning system where cationic polyacrylamide is added as a conditioning agent at a dosage controlled at 2‰ of the dry sludge mass. This is precisely added via a metering pump and thoroughly mixed with the sludge before entering a diaphragm plate and frame filter press for deep dewatering. First, packing filtration is performed at a feed pressure of 0.6–0.8 MPa, followed by diaphragm extrusion at a pressing pressure of 1.2–1.5 MPa. In the later stages of filtration, the sludge is passed through a 0.8 MPa filter press. The sludge is subjected to secondary compression with compressed air at ~1.0MPa. The multi-stage pressure combination ensures that a dense solid sludge cake is formed after dewatering. The dewatered sludge cake is then transported to the resource utilization stage, where it can be transported to the boiler room of the plant and mixed evenly with combustion aids in proportion to make full use of the calorific value of the sludge. The filter liquid, rinsing wastewater and laboratory wastewater generated during the dewatering process are collected and returned to the equalization tank 200 and re-enter the treatment system. The water volume changes of each process unit are monitored in real time by electromagnetic flow meters to ensure the water balance of the entire wastewater treatment system is stable.

[0045] It should also be noted that by constructing an A / O and aerobic biochemical system 400, integrating precise aeration, sludge-water separation and deep sludge dewatering technologies, the system achieves synergistic and efficient degradation of residual organic matter and nitrogen in anaerobic effluent. This solves the problems of low nitrogen removal efficiency, sludge bulking and excessive effluent turbidity in traditional aerobic treatment, improves effluent quality, reduces sludge volume, and enhances resource utilization.

[0046] Example 3 is an embodiment of the present invention, which provides a multi-source biological fermentation wastewater treatment system, including a wastewater collection and regulation module, an anaerobic treatment module, and an aerobic treatment and sludge-water separation module.

[0047] The wastewater collection and regulation module is used to introduce bio-fermentation wastewater from different sources into the corresponding collection tank according to the preset COD concentration level, and monitor the water quality parameters of the effluent in the collection tank in real time. Based on the real-time water quality data, the wastewater is adjusted in proportion to maintain a stable pH value.

[0048] The anaerobic treatment module is used to anaerobic treat mixed wastewater. It carries out anaerobic reactions through a unitized anaerobic reactor, controls the hydraulic retention time by controlling the frequency of the influent booster pump, maintains the tank temperature, and automatically adjusts the influent flow rate based on feedback.

[0049] The aerobic treatment and sludge-water separation module is used to perform carbon and nitrogen co-degradation on anaerobic effluent, maintain solid-liquid separation and biomass balance in the mixed liquor, and consists of an A / O system and an aerobic biochemical system 400 connected in series to form the aerobic treatment system. The sludge return pump is automatically controlled by monitoring the sludge concentration.

[0050] This embodiment also provides a computer device, including a memory and a processor. The memory stores a computer program, and when the processor executes the computer program, it implements the multi-source biological fermentation wastewater treatment method proposed in the above embodiment.

[0051] This embodiment also provides a computer-readable storage medium storing a computer program thereon, which, when executed by a processor, implements the multi-source biological fermentation wastewater treatment method proposed in the above embodiments.

[0052] 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.

[0053] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-including system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0054] More specific examples of computer-readable media (a non-exhaustive list) include: electrical connections (electronic devices) having one or more wires, portable computer disk drives (magnetic devices), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, computer-readable media can even be paper or other suitable media on which the program can be printed, because the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in computer memory.

[0055] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0056] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A method for treating multi-source biological fermentation wastewater, characterized in that, include: Biological fermentation wastewater with different COD concentrations was collected into corresponding collection tanks, and the water quality parameters of each collection tank were monitored in real time. Based on the monitored water quality parameters, the PLC control system adjusts the mixing ratio of biological fermentation wastewater of various concentrations according to the preset ratio, and adjusts the pH value of the mixed biological fermentation wastewater. The adjusted wastewater is pumped into a unitized anaerobic reactor (300) for multi-layer biological anaerobic treatment; The effluent after anaerobic treatment is sequentially passed through an A / O and an aerobic biochemical system (400) for carbon and nitrogen synergistic degradation and mud-water separation.

2. The method for treating multi-source biological fermentation wastewater as described in claim 1, characterized in that: The different concentrations of bio-fermentation wastewater are collected in corresponding collection tanks, including: Based on the COD concentration of bio-fermentation wastewater, it is divided into three levels: ultra-high concentration wastewater, high concentration wastewater, and low concentration wastewater. Ultra-high concentration wastewater is stored in a special collection tank made of corrosion-resistant material, high concentration wastewater is stored in a reinforced concrete equalization tank, and low concentration wastewater enters the collection tank (100) after large particulate suspended solids are removed by a bar screen channel.

3. The method for treating multi-source biological fermentation wastewater as described in claim 1 or 2, characterized in that: The adjustment of the pH value of the mixed bio-fermentation wastewater includes, Flow rate is controlled by adjusting the opening and closing of electric regulating valves installed on various wastewater pipelines. At the same time, the wastewater is mixed evenly by a stirrer. An automatic pH adjustment system is used to maintain a stable pH value by outputting the acid and alkali dosage based on real-time pH monitoring values ​​and through a PID control algorithm.

4. The method for treating multi-source biological fermentation wastewater as described in claim 3, characterized in that: The adjusted wastewater is pumped into a unitized anaerobic reactor (300) for multi-layer biological anaerobic treatment, including: The hydraulic retention time (HRT) is controlled by adjusting the frequency of the inlet booster pump to maintain a stable reactor temperature. The temperature is maintained by the tank insulation layer and the built-in hot water circulation system, and the circulation flow rate is automatically adjusted according to the temperature monitoring value.

5. The method for treating multi-source biological fermentation wastewater as described in claim 1, 2, or 4, characterized in that: The modular anaerobic reactor (300) includes, The reactor adopts a parallel modular structure and is equipped with a three-layer combined packing system, including a bottom high-load biodegradation layer, a middle biofilm enhanced treatment layer, and an upper fine treatment and sludge retention layer. The bottom layer of high-load biodegradable layer is filled with elastic three-dimensional packing material, and the large molecular organic matter in the wastewater is decomposed into small molecular organic acids under the action of anaerobic microorganisms. The middle biofilm reinforcement layer uses polypropylene bio-rope packing material, and the acetic acid bacteria produced further transform the small molecule organic acids flowing in from the bottom layer. The upper fine treatment and sludge retention layer contains suspended biological balls with activated carbon adsorption medium, which adsorb trace amounts of incompletely degraded organic matter and effectively retain anaerobic sludge particles that rise with the water flow.

6. The method for treating multi-source biological fermentation wastewater as described in claim 5, characterized in that: The carbon and nitrogen synergistic degradation and mud-water separation via A / O and aerobic biochemical system (400) includes, The A / O process has a pre-anoxic section hydraulic retention time and a post-aerobic section hydraulic retention time. The anoxic section is equipped with a submersible mixer, and the aerobic section uses microporous aeration discs for aeration. The blower frequency is adjusted by online dissolved oxygen monitoring feedback. The aerobic tank uses a biological contact oxidation process, and the tank is filled with combined packing materials. The air-to-water ratio is maintained by adjusting the operating frequency of the Roots blower.

7. The method for treating multi-source biological fermentation wastewater as described in claims 1, 2, 4, or 6, characterized in that: The carbon and nitrogen synergistic degradation and mud-water separation via A / O and aerobic biochemical system (400) includes, By monitoring the mixed liquor sludge concentration in real time, the sludge discharge pump automatically starts and stops based on the total amount of sludge in the system and the daily sludge discharge output. A turbidity monitor is installed, and the system alarm is triggered and the emergency response procedure is initiated based on the monitoring data.

8. A multi-source biological fermentation wastewater treatment system, employing the multi-source biological fermentation wastewater treatment method as described in any one of claims 1 to 7, characterized in that: Includes a wastewater collection and regulation module, an anaerobic treatment module, and an aerobic treatment and sludge-water separation module; The wastewater collection and regulation module is used to introduce bio-fermentation wastewater from different sources into the corresponding collection tank according to the preset COD concentration level, and monitor the water quality parameters of the effluent in the collection tank in real time. Based on the real-time water quality data, the wastewater is adjusted in proportion to maintain a stable pH value. The anaerobic treatment module is used to anaerobic treat mixed wastewater. Anaerobic reaction is carried out through a unitized anaerobic reactor (300). The hydraulic retention time is controlled by the frequency of the influent booster pump to maintain the tank temperature and automatically adjust the influent flow rate. The aerobic treatment and sludge-water separation module is used to perform carbon and nitrogen co-degradation on the anaerobic effluent, maintain solid-liquid separation and biomass balance of the mixed liquor, and is composed of A / O and aerobic biochemical system (400) connected in series to form aerobic treatment. The sludge return pump is automatically controlled by sludge concentration monitoring.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the multi-source biological fermentation wastewater treatment method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by the processor, it implements the steps of the multi-source biological fermentation wastewater treatment method according to any one of claims 1 to 7.

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