20 results about "Activated sludge system" patented technology

The purpose of the present invention is to achieve an ozone water concentration estimation device which is capable of monitoring ozone water concentration with a simpler configuration than before even if impurities are present in ozone water. This ozone water concentration estimation device comprises a first data acquisition unit, an estimation unit, and a data output unit. The first data acquisition unit acquires first generation environment data including at least one of the ozone gas concentration of an ozone gas that is supplied to the inside of an ozone water generation tower, the ozone gas flow rate of the ozone gas, the water temperature of the ozone water that is retained in the ozone water generation tower, the pH of the ozone water, and the retention amount of the ozone water. The estimation unit estimates, from the first generation environment data, an ozone water concentration estimate value, which is an estimated value of the ozone water concentration in the ozone water at the time of measurement of the first generation environment data input from the first data acquisition unit, using a numerical model that estimates the ozone water concentration, which is the concentration of ozone dissolved in the ozone water at the time of measurement of the first generation environment data. The data output unit outputs the ozone water concentration estimate value.

The application discloses a method for efficiently removing sulfonamide antibiotics by flocculent sludge domestication, and belongs to the technical field of sewage treatment. The method greatly improves the removal rate of sulfonamide antibiotics by adjusting the culture conditions of activated sludge in a traditional activated sludge system. The method can effectively remove antibiotics, has the characteristics of simple operation, low treatment cost and large-scale operation, and the removal of pollutants is mainly realized by sludge adsorption and microbial degradation. The important functional bacteria, nitrifying bacteria, in the activated sludge treatment process can improve the removal efficiency of antibiotics including antibiotic drugs through co-metabolism while completing nitrification, so that the functional bacteria can be enriched by inoculating activated sludge and domesticating the sludge into flocculent form, and the functional bacteria are used to efficiently remove sulfonamide antibiotics.

A powdered activated carbon (PAC) enhanced activated sludge system for removing PFAS from a flow of wastewater and / or landfill leachate includes at least one bioreactor including biomass to receive the flow wastewater and / or landfill leachate and to promote growth of biological flocs and an impregnation subsystem which receives a flow of biomass and / or settled biomass and a predetermined amount PAC and blends the biomass and / or the settled biomass with the PAC to form PAC-impregnated biological flocs. The at least one impregnation system outputs a flow of PAC-impregnated biological flocs to the bioreactor such that the PAC-impregnated biological flocs in the bioreactor adsorb to and remove a majority of the PFAS from the flow of wastewater and / or landfill leachate and the bioreactor outputs a flow of PAC-impregnated biological flocs having a majority of the PFAS adsorbed thereto and wastewater and / or landfill leachate having a majority of the PFAS removed. The system also includes at least one secondary clarifier coupled to the bioreactor which separates the PAC-impregnated biological flocs having a majority of the PFAS adsorbed thereto from the wastewater and / or landfill leachate having a majority of the PFAS removed and produces a flow the treated wastewater and / or landfill leachate having a majority of the PFAS removed.

The utility model relates to the technical field of wastewater treatment, in particular to an activated sludge system. The system comprises: a pretreatment tank; the primary sedimentation tank is communicated with the pretreatment tank through a first conveying pipeline; the aeration tank is internally provided with activated sludge, and the aeration tank is communicated with the primary sedimentation tank through a second conveying pipeline; a first sampler is arranged on the aeration tank; the secondary sedimentation tank is communicated with the aeration tank through a third conveying pipeline; the bottom of the secondary sedimentation tank is communicated with the bottom of the aeration tank through a backflow pipeline, so that part of sludge flows back to the aeration tank; a second sampler is arranged on the secondary sedimentation tank; the oxygen supply device is used for supplying oxygen to the aeration tank; the control device performs the following control: after the first sampler acquires the activated sludge sample of the aeration tank for a preset time, the second sampler acquires an effluent sample of the secondary sedimentation tank; the preset time is the time when the wastewater flows from the sampling point of the first sampler to the sampling point of the second sampler. The system provided by the utility model can synchronously obtain the matched conditions in the pool.

The present application relates to the field of wastewater treatment, and particularly relates to a method for advanced denitrification of low carbon-nitrogen ratio wastewater based on short-cut nitrification and denitrification and anaerobic ammonia oxidation, which establishes an activated sludge bioaugmentation system by adding biochar immobilized ZB403 strain into an SBR activated sludge system, and domesticates the activated sludge bioaugmentation system by adjusting the component and content of simulated wastewater and optimizing the operation conditions of the bioaugmentation system, and optimizes the biological community structure in the system. The activated sludge bioaugmentation system is used for treating low carbon-nitrogen ratio wastewater, the inorganic nitrogen removal rate is above 99%, the COD removal rate is above 97%, and the sludge yield coefficient Yobs is 0.27-0.29 kgVSS / kgCOD.

The invention provides a sewage treatment method beneficial to sludge reduction, and relates to the field of sewage treatment. The sewage treatment method comprises the following steps: adding graphene subjected to surface hydrophilization modification into an activated sludge system, and intensifying the formation of granular sludge through anaerobic-aerobic alternate operation and hydraulic separation in a sequencing batch reactor. The Raman spectrum ID / IG ratio of the modified graphene is less than or equal to 0.2. According to the present invention, the modified graphene provides the microorganism attachment carrier and the electron transfer channel, and the dynamic precipitation control strategy is combined to achieve the rapid formation of the granular sludge, the improvement of the system treatment efficiency and the significant reduction of the excess sludge, such that the method is suitable for the low-carbon and high-efficiency municipal and industrial sewage treatment.

This invention discloses a wastewater treatment method using electrostatic field-coupled aerobic nitrification, belonging to the field of wastewater treatment technology. Acclimated sludge, wastewater, and insulating electrodes are added to an aerobic nitrification reactor. A voltage of 0-2 V / cm is applied outside the reactor to form an electrostatic field, controlling the organic load in the wastewater to be 500-4000 mg / L and the ammonia nitrogen concentration to be 100-400 mg / L, thus achieving wastewater treatment. This invention reveals the intrinsic mechanism of an electric field-coupled activated sludge system for treating ammonia nitrogen wastewater, enriching knowledge in the field of microbial electrochemistry, clarifying the influence of various factors on microbial activity and function, providing a new perspective for understanding the role of microorganisms in wastewater treatment, significantly improving ammonia nitrogen wastewater treatment efficiency, reducing pollutant content, reducing environmental pollution, and ensuring water quality and ecological safety; it also reduces aeration-related energy requirements and lowers the cost of ammonia nitrogen wastewater treatment.

An enhanced activated sludge system for removing PFAS from a flow of wastewater and / or landfill leachate includes at least one bioreactor configured to receive a flow of wastewater and / or landfill leachate and configured to promote growth of biological flocs. The at least one bioreactor mixes the biological flocs with a particulate media to form biological flocs enmeshed with the particulate media which adsorb and remove a majority of the PFAS from the flow of wastewater and / or landfill leachate and outputs a flow of biological flocs enmeshed with the particulate media having the majority of PFAS adsorbed thereto and treated wastewater and / or landfill leachate having a majority of the PFAS removed. A separation subsystem separates the biological flocs enmeshed with the particulate media having the majority of PFAS adsorbed thereto from the treated wastewater and / or landfill leachate and outputs a flow of treated wastewater and / or landfill leachate having a majority of the PFAS removed.

The invention provides a method for evaluating an activated sludge system response mechanism under antibiotic impact and application thereof, and belongs to the technical field of water environment risk evaluation and management. The method mainly relates to detection of water quality indexes (ammonia nitrogen, total nitrogen, total phosphorus and chemical oxygen demand) in the activated sludge and physicochemical characteristics (extracellular polymeric substance EPS, sludge settling performance and Zeta potential) of the activated sludge, and a response mechanism of an activated sludge system under antibiotic impact is analyzed by taking ciprofloxacin (CIP), ofloxacin (OFL) and enrofloxacin (ENR) as indication pollutants. Effective reference is provided for system regulation and control when a sewage plant faces antibiotic impact, and a new insight is provided for removing antibiotics and drug-resistant genes in wastewater by explaining the relation among functional genes, drug-resistant genes and microbial communities in an activated sludge system under antibiotic exposure.

The invention discloses an intelligent phosphorus removal agent adding system and method based on an activated sludge process sewage treatment process, and belongs to the technical field of sewage treatment. A monitoring module, a control module, an adding module, an agent storage module, a process linkage feedback regulation module and a safety protection module are in signal connection and then cooperatively work; the method breaks through the deficiency of the traditional phosphorus removal agent adding technology on process suitability, realizes the synergism of agent adding and sludge reduction by integrating an activated sludge process flow, accurately adding in different areas, constructing double closed-loop feedback and additionally arranging a process abnormality instant response, improves the phosphorus removal effect, reduces agent waste, and simultaneously reduces the cost of the phosphorus removal agent. The stability of the activated sludge system is guaranteed, the operation and maintenance cost is reduced, the effluent quality is ensured to be stable and reach the standard, and meanwhile, the method has good process suitability, compatibility and safety reliability.

The application provides a device and method for realizing sludge separation and double-sludge anaerobic ammonia oxidation synchronously, which comprises the following steps: sewage flows into a first anaerobic tank from an original water tank; meanwhile, part of sludge at the bottom of an activated sludge system flows back to the first anaerobic tank; part of sludge-water mixture flows into a second anaerobic tank from the first anaerobic tank, and then flows through a first aerobic tank and a second aerobic tank from the second anaerobic tank in sequence; part of sludge-water mixture flows into an inclined plate separator from the second aerobic tank; sludge separation is realized by an inclined plate in the inclined plate separator; sludge with a particle size greater than a preset value is intercepted above the inclined plate, and sludge with a particle size less than or equal to the preset value passes through the inclined plate and is located below the inclined plate; part of sludge-water mixture above the inclined plate enters the activated sludge system; part of sludge-water mixture below the inclined plate enters a biofilm system; and denitrification is realized by the activated sludge system and the biofilm system respectively.

The invention belongs to the technical field of random system control and sewage treatment, and discloses a T-S fuzzy Markov jump system control method based on an activated sludge system. According to the method, a nonlinear kinetic model is constructed from key state variables of the system, and the complex biological reaction and substance transfer process in sewage treatment is accurately described. By introducing the Markov jump theory, parameter random jump caused by inlet water quality sudden change and the like is effectively described, and the adaptability and accuracy of the model under the dynamic working condition are enhanced. For possible faults of an actuator (such as a dilution valve and an aerator), a fault model is established and a corresponding fault-tolerant control strategy is designed, so that the reliability and robustness of the system are improved. On the basis of the Lyapunov stability theory, a linear matrix inequality condition which enables the system to be randomly stable under the fault and disturbance and meets the H-infinity performance index is deduced, the effectiveness of the linear matrix inequality condition is verified through strict mathematical derivation, and a theoretical basis is provided for implementation of a controller and stable operation of the system.

The invention belongs to the technical field of sewage treatment, and relates to an activated sludge system gas supply flow control method and application. The specific technical scheme is as follows: (1) in the operation process of the activated sludge sewage treatment system, acquiring the oxygen uptake rate OUR, the dissolved oxygen DO and the temperature T of the activated sludge in an aerobic tank in real time, recording the air supply flow Q, and constructing a training test data set; (2) training an artificial neural network model by taking the oxygen uptake rate OUR, the dissolved oxygen DO and the temperature T as model input and taking the air supply flow Q as model output; and (3) during the operation of the activated sludge sewage treatment system, calculating the corresponding air supply flow Q by using the trained artificial neural network model, and adjusting the actual air supply flow of the aerobic tank of the activated sludge sewage treatment system to the air supply flow Q calculated by the artificial neural network model. The air supply flow is regulated and controlled based on the activated sludge process state, and blindness and hysteresis of air supply flow regulation completely depending on dissolved oxygen (DO) feedback are avoided to a certain extent.

This application discloses an optimization method for regulating the SVI (Sludge Volume Index) of activated sludge based on algae control. The method includes: real-time monitoring of the SVI value in the aerobic activated sludge tank; adding algae at a set ratio to the aerobic activated sludge tank with abnormal SVI values, where abnormal SVI values ​​include both excessively low and excessively high values; for excessively low SVI values ​​(20-60 mL / g), adding algae to maintain the algae concentration in the aerobic tank at 150-250 mg / L to improve the sludge floc structure; for excessively high SVI values ​​(130-200 mL / g), adding algae to maintain the algae concentration in the aerobic tank at 50-150 mg / L to compress the sludge volume. This application achieves targeted regulation and long-term stability of the SVI value within a target range by precisely introducing specific algae into the activated sludge system.

The application discloses a state interval estimation method for activated sludge treatment process based on an interval observer. Considering a large amount of uncertainty existing in a sewage treatment process, the application studies state interval estimation of an activated sludge system composed of an aeration tank and a sedimentation tank. Firstly, a mathematical model is established for a dynamic process of activated sludge reaction. Secondly, a T-S (Takagi-Sugeno) fuzzy method is used to perform pseudo-linearization processing on the established nonlinear model, so that a T-S fuzzy system is obtained, and the complexity of the model is reduced. Finally, an interval observer is designed for the T-S fuzzy model, the interval observer has interference robustness, and through the interval observer, the upper limit and the lower limit of the state of the activated sludge treatment process can be estimated, thereby providing a new thought and method for state monitoring of the activated sludge treatment process.

The utility model discloses a reflux ratio regulator, which relates to the technical field of sewage treatment and comprises a support frame, a box body is fixed at the top of the support frame, a reflux pipe and a recovery pipe are respectively mounted on the inner wall of the box body, a flow guide frame for guiding the flow of returned sludge is arranged in the box body, and the return pipe is connected with the recovery pipe. And an adjusting assembly for adjusting the flow guide angle of the flow guide frame is arranged in the box body. The sludge treatment device has the beneficial effects that sludge is guided and conveyed through the flow guide frame, the sludge is guided into the aeration tank again through the return pipe, the microbial biomass of an activated sludge system is maintained, the rotating rod drives the flow guide frame to rotate, so that the flow guide frame guides the sludge into the recycling pipe, and redundant sludge is discharged through the recycling pipe; the flow guide frame and the return pipe jointly adjust the sludge split ratio, the system operation efficiency is optimized, the flow guide frame is driven to rotate through the adjusting assembly, sludge is distributed to the return pipe or the recovery pipe, and dynamic control over the return ratio is achieved.

A powdered activated carbon (PAG) enhanced activated sludge system for removing PEAS from a flow of wastewater and / or landfill leachate includes at least one bioreactor including biomass to receive the flow wastewater and / or landfill leachate and to promote growth of biological flocs and an impregnation subsystem which receives a flow of biomass and / or settled biomass and a predetermined amount PAG and blends the biomass and / or the settled biomass with the PAG to form PAC-impregnated biological flocs. The at least one impregnation system outputs a flow of PAC-impregnated biological flocs to the bioreactor such that the PAC-impregnated biological flocs in the bioreactor adsorb to and remove a majority of the PEAS from the flow of wastewater and / or landfill leachate and the bioreactor outputs a flow of PAC-impregnated biological flocs having a majority of the PEAS adsorbed thereto and wastewater and / or landfill leachate having a majority of the PEAS removed.

The application discloses a sewage treatment process for organic wastewater, and belongs to the field of sewage treatment, and comprises the following steps: S1, pumping wastewater containing nitrogen-containing organophosphonic acid metal complex into a dielectric barrier discharge reactor, and reducing P-C bond energy through high-energy electron bombardment; S2, adding a modified layered metal hydroxide containing intercalated carbon quantum dots and persulfate and black aspergillus immobilized microspheres into the wastewater treated by plasma; S3, using a magnetic layered metal hydroxide material to deeply adsorb heavy metal ions in the wastewater treated by the composite oxidation under a gradient magnetic field; S4, sequentially passing the wastewater after magnetic adsorption through an anaerobic ammonia oxidation coupling reactor and an aerobic biofilm-activated sludge system to degrade pollutants; S5, using a layered immobilized algal-bacterial symbiotic system to remove phosphorus from the wastewater treated by the biological treatment; and S6, terminal magnetic recovery and water disinfection. The application solves the problems of low and incomplete decomplexing efficiency of the prior art.

An enhanced activated sludge system for removing PFAS from a flow of wastewater and / or landfill leachate includes at least one bioreactor configured to receive a flow of wastewater and / or landfill leachate and configured to promote growth of biological flocs. The at least one bioreactor mixes the biological flocs with a particulate media to form biological flocs enmeshed with the particulate media which adsorb and remove a majority of the PFAS from the flow of wastewater and / or landfill leachate and outputs a flow of biological flocs enmeshed with the particulate media having the majority of PFAS adsorbed thereto and treated wastewater and / or landfill leachate having a majority of the PFAS removed. A separation subsystem separates the biological flocs enmeshed with the particulate media having the majority of PFAS adsorbed thereto from the treated wastewater and / or landfill leachate and outputs a flow of treated wastewater and / or landfill leachate having a majority of the PFAS removed.

The invention relates to a sewage plant microorganism selective enrichment control method based on an r / k theory, which is applied to a sewage treatment system and comprises the following steps of: rearranging an aeration mixing device, a dosing device and a plurality of online process instruments in AAOAO and a variant process thereof; the internal and external reflux ratio and the dosage are regulated and controlled by combining real-time numerical values of an online process instrument, so that the ammonia nitrogen load at the tail end of the front anoxic tank and the sludge concentration of the biochemical tank are adaptive to the growth range of r-strategy microorganisms; a substrate flux environment is created by adjusting an aeration mode and an aeration rate so as to strengthen competitive advantages of r-strategy functional microorganisms, so that selective enrichment of efficient r-strategy functional bacteria and improvement of microbial activity in different scenes of a sewage plant are realized, the concentration of a pollutant substrate is quickly reduced, the treatment efficiency of an activated sludge system is improved, and the treatment cost is reduced. The problems of stable and up-to-standard effluent quality, energy conservation and consumption reduction at low temperature and high inlet water concentration in winter of an existing sewage plant are effectively solved.