33 results about "Sludge bulking" patented technology

The invention provides a method for inhibiting sludge bulking through hypoxia-anoxic intermittent aeration. The method comprises the following steps: inoculating activated sludge into a sequencing batch reactor, introducing sewage to be treated, mixing, and carrying out intermittent aeration treatment; wherein the intermittent aeration treatment comprises at least one cycle formed by alternation of a low-oxygen treatment time period and an anoxic treatment time period; and in the low-oxygen treatment period, the dissolved oxygen concentration in the reactor is controlled to be higher than that in the anoxic treatment period through aeration. According to the method, through low-oxygen-oxygen-deficiency alternate environment regulation and control, efficient nitrification and denitrification are achieved, meanwhile, filamentous bacterium growth is selectively inhibited, flora structure optimization is promoted, the sludge settling performance is rapidly recovered, the system denitrification efficiency is improved, and the method has the advantages of being simple in process, environmentally friendly and low in operation cost.

The present application provides a sludge bulking inhibition method based on soft constraint model predictive control, which adjusts the control strategy according to the cause variable of sludge bulking, so as to track the dissolved oxygen concentration and nitrate nitrogen concentration to the expected value and realize the inhibition of sludge bulking. The present application designs a sludge bulking intelligent diagnosis algorithm, calculates the relative reconstruction contribution, diagnoses the cause variable of sludge bulking, designs a soft constraint model predictive control strategy, guides the priority order of the controlled target according to the cause variable, softens the strict output constraint by using the slack variable, and obtains the control law by sequentially optimizing the controlled target. The experimental results show that the method can effectively inhibit the sludge bulking in the urban sewage treatment process.

The present application relates to a kind of sludge grading backflow denitrification and phosphorus removal process and device suitable for municipal wastewater, comprising the following steps: active sludge and raw water are introduced into anaerobic zone one simultaneously by water inlet pipe, forming mixed liquor;The mixed liquor is lifted to anaerobic zone two using variable frequency booster pump, and further mixed reaction is carried out by stirrer;The mixed liquor treated after anaerobic zone two is introduced into transition zone, and denitrification reaction is strengthened;Make mixed liquor into aerobic zone, carry out nitrification and partial simultaneous denitrification reaction, then carry out screening treatment by cyclone screen, the heavy density sludge separated is backflowed to anaerobic zone one by pre-sedimentation backflow pipe, and the remaining sludge is transported to secondary sedimentation tank for sedimentation treatment, and part of the sludge after sedimentation treatment is backflowed to transition zone by external backflow pipe.Compared with prior art, the present application realizes the continuous gravity screening of sludge system denitrification and phosphorus removal sludge and the optimal allocation of carbon source, effectively controls sludge bulking, and improves sludge concentration and system processing efficiency.

The invention discloses a sludge settling performance intelligent diagnosis and early warning system and method based on full-automatic visual analysis, and relates to the technical field of sewage treatment. The system comprises an imaging unit, a laser calibration unit, an image processing module, an image segmentation and tracking module, a data analysis unit and an ultrasonic cleaning device. The method comprises the steps of sampling, laser calibration and image acquisition, preprocessing, segmentation tracking, parameter calculation, early warning and cleaning. According to the method, a pixel millimeter mapping relation is established through 635nm laser calibration, UNet segmentation and an LSTM prediction model are combined, online MLSS data are fused, high-precision interface tracking is realized, Vs, Cc, dynamic SVIt and other parameters are output in real time, and the early warning accuracy is improved 2-6 hours before sludge bulking / disintegration. According to the scheme, the problems that traditional manual detection is large in error and high in hysteresis quality and an existing visual scheme is low in precision are solved, the measurement efficiency is improved, and the method is suitable for AAO, MBR and other processes.

The utility model provides an anaerobic bioreactor, it includes reactor shell, inlet pipe, inlet main, nitrogen pipe, circulating water pipe and outlet pipe, the reactor shell is equipped with water distribution pipe, circulating water collecting pipe and three -phase separator from below to above in proper order, the top of reactor shell is equipped with marsh gas pipe, two ends of water distribution pipe are connected with two inlet main respectively, water distribution pipe includes a plurality of side -by -side arrangement's perforated pipe, the side of perforated pipe is equipped with obliquely downward water distribution hole, inlet main with inlet pipe, circulating water pipe, nitrogen pipe intercommunication, nitrogen control valve is equipped on nitrogen pipe, inlet control valve is equipped respectively between inlet pipe and two inlet main, circulating water collecting pipe with circulating water pipe intercommunication, the upper portion of three -phase separator with outlet pipe intercommunication. The technical scheme of the present application increases sludge expansion effect, has improved the mass transfer effect in the reactor, has avoided water distribution pipe blockage, and the processing efficiency is high.

The invention discloses a method for recovering filamentous bacterial expansion of moderately halophilic aerobic granular sludge, and belongs to the technical field of high-salinity wastewater treatment. The method aims at the problem of sludge bulking caused by the fact that filamentous bacteria and lactic acid producing bacteria Halolacbacillus sp. Grow synergistically in a high-salt environment, and the Halolacbacillus sp. Secretes lactic acid to induce overgrowth of the filamentous bacteria, and the rapid proliferation of fungi is promoted by controllably reducing the salinity of a system. Fungus hyphae extend in the particles to form an oxygen conveying channel, the anaerobic area is improved, the living space of the Halolabacillussp. Is compressed, and lactic acid supply of filamentous bacteria is cut off to inhibit growth of the filamentous bacteria. In this way, the structure of the moderately halophilic aerobic granular sludge with filamentous bacterial expansion can be recovered and strengthened in a short time. The method is a non-toxic, low-cost, simple-to-operate, safe, efficient, stable and reliable regulation and control mode.

The present application belongs to the technical field of sewage treatment, and particularly relates to a treatment system and method for sludge bulking caused by filamentous bacteria. The method comprises: performing starvation operation on a sewage biological treatment system in which filamentous bacteria bulking occurs, wherein the starvation operation is to stop or reduce the supply of organic carbon, nitrogen and phosphorus to the sewage biological treatment system; and after the starvation operation, performing supplemental nitrate water feeding on the sewage biological treatment system, wherein the supplemental nitrate water feeding comprises: resuming the supply of water containing an organic carbon source to the sewage biological treatment system, while increasing the concentration of nitrate nitrogen in the water. Through two-stage regulation of “starvation operation + nitrate supplement”, the present application precisely utilizes the metabolic disadvantage of filamentous bacteria under low substrate conditions and the sensitivity of filamentous bacteria to a nitrate environment, so as to selectively inhibit the growth of filamentous bacteria and quickly restore the settling performance of the reactor in a short period of time.

The invention relates to a method and system for treating high-ammonia-nitrogen organic wastewater by coupling carbon capture with anaerobic ammonia oxidation, and the method comprises the following steps: inhibiting the growth of sludge bulking microorganisms in wastewater by utilizing the alternation of an anaerobic environment and an aerobic environment, and removing ammonia-oxidizing microorganisms in the wastewater by controlling the retention time of the wastewater in the anaerobic environment and the aerobic environment. The method comprises the following steps: screening and domesticating sludge carbon entrapped microorganisms, and promoting rapid metabolism and proliferation of the carbon entrapped microorganisms by utilizing an aerobic environment, so that organic matters in wastewater are rapidly captured, sludge is discharged, carbon and nitrogen separation of the wastewater is realized, high-ammonia-nitrogen low-carbon effluent is obtained, anaerobic ammonia oxidation treatment denitrification is performed on the high-ammonia-nitrogen low-carbon effluent, and the high-ammonia-nitrogen low-carbon effluent is obtained. And low-ammonia-nitrogen low-carbon effluent is obtained. The system comprises an ammonia protection and carbon interception unit and an anaerobic ammonia oxidation unit. According to the method, carbon and nitrogen in the high-ammonia-nitrogen organic wastewater can be effectively separated, the separated carbon and nitrogen are treated respectively, and on the premise that carbon and nitrogen in the wastewater are efficiently removed, resource utilization of carbon is achieved.

The application discloses a kind of early warning device and method of sludge bulking in early stage of SBR reactor based on computer vision.The device uses double visual angle to carry out real-time monitoring to activated sludge of each operation cycle of SBR reactor, one is through collecting sludge apparent image of SBR reactor, the early characteristics of sludge bulking are extracted, then early warning model of sludge bulking in early stage is used to judge the running state of reactor;Another is to collect sludge settling image of SBR reactor in the sedimentation stage, automatically generate sludge settling curve and sludge settling rate curve and carry out information extraction, and then judge the settling performance of sludge in SBR reactor, and alarm sludge bulking soon.This method combines sludge apparent image and settling image information, comprehensively analyzes the early characteristics of sludge bulking, reduces misjudgment, improves recognition accuracy, solves the problems of sewage plant sludge bulking phenomenon burst, high subsequent control cost, long recovery time and the like.

This invention discloses an adaptive limit control system and method for SBR decanter based on multi-parameter coupling, belonging to the field of intelligent control technology for wastewater treatment. Addressing the non-contact sludge runoff phenomenon of "siphon following effect" caused by sludge expansion or deterioration of settling performance during the SBR decanting stage, this invention constructs a dual closed-loop control architecture of multi-parameter coupling, incorporating feedforward prediction and feedback self-learning. The system comprises a multi-parameter sensing module, a multi-parameter coupled modeling and control unit, an execution module, and a feedback correction module. By integrating multi-dimensional information such as online MLSS, temperature, real-time sludge level from the sludge interface meter, online effluent SS / TP monitoring, and laboratory SV30 / SVI data and their input timeliness, it establishes a "sedimentation risk-safety margin" mapping model expressed as a product of the sedimentation expansion coefficient k₁, activity inhibition coefficient k₂, density compensation coefficient k₃, and time-related decay coefficient k₄. This model dynamically generates a safety redundancy distance ΔS, and outputs the optimal lower limit Hopt = L + ΔS, pre-setting the limit before decanting begins, thus achieving a fundamental shift from reactive emergency shutdown to proactive prevention. The feedback correction module continuously corrects model parameters through automatic attribution judgment and trial-and-error optimization algorithms, maximizing the single-cycle treatment capacity while ensuring effluent compliance. This invention is the first to achieve proactive control of the siphon following effect, significantly improving the effluent compliance rate and operating efficiency of the SBR process under complex operating conditions.

The invention relates to a method and a system for ammonia conservation and carbon interception of high-ammonia-nitrogen organic sewage, and the method comprises the following steps: utilizing the alternation of an anaerobic environment and an aerobic environment to inhibit the growth of sludge bulking microorganisms in the sewage, and controlling the retention time of the sewage in the anaerobic environment and the aerobic environment to remove ammoxidation microorganisms in the sewage, so as to realize the ammonia conservation and carbon interception of the high-ammonia-nitrogen organic sewage. The method realizes screening and domestication of sludge carbon entrapped microorganisms, promotes rapid metabolism and proliferation of the carbon entrapped microorganisms by using an aerobic environment, rapidly captures and discharges organic matters in sewage through high organic matter adsorption capacity, rapid metabolism and proliferation of the carbon entrapped microorganisms, obtains high-ammonia-nitrogen low-carbon effluent, and realizes carbon-nitrogen separation of the sewage. The system comprises an anaerobic selection tank, an aerobic carbon interception tank and a sedimentation tank which are connected in sequence, a part of mud-water mixture in the aerobic carbon interception tank and a part of sludge in the sedimentation tank flow back to the anaerobic selection tank, and residual sludge in the sedimentation tank is discharged. The method can realize effective carbon and nitrogen separation of the high-ammonia-nitrogen organic sewage, and is beneficial to recycling of carbon and nitrogen resources.

The present application belongs to the technical field of sewage treatment risk early warning, and discloses a method for predicting sludge bulking by integrating sludge volume and toxicity effect in a sewage treatment process, which comprises the following steps: S1. calculating RIS according to the integrated sludge biological effect index and physicochemical index; the RIS is the product of the sludge functional enzyme biological index (the ratio of the maximum effect concentration to the half effect concentration) and the physicochemical index (the ratio of the measured SVI value to the limited SVI value of sludge bulging); S2. defining the safe range of sludge bulging under the RIS according to the risk event probability statistics, and defining the success event and the failure event as RIS<2 and RIS>2 respectively; MOS=L * N max ‑(LN max ‑Z risk S * )=Z risk S * (5) wherein: S * : the standard deviation of the process index of the sewage plant; Z risk : the standard normal quantile of any specified acceptable risk level, and the value is obtained by consulting the normal distribution table; the evaluation result of the present application is high in accuracy, and to a certain extent, prevents the limitations brought by sludge bulging faced by the sewage treatment process system.

The invention belongs to the field of wastewater treatment, and discloses a method for inhibiting low-temperature sludge bulking by adding diatomite. The method comprises the following steps: treating sewage by adopting an activated sludge process under the condition that the water temperature is 4-15 DEG C, monitoring the settling property of the sludge during sewage treatment, adding a diatomite dispersion liquid into a biochemical reaction zone when the sludge expands, so that the concentration of the diatomite in the biochemical reaction zone is 200-400 mg / L, and after the diatomite dispersion liquid is added, adding the diatomite dispersion liquid into the biochemical reaction zone to ensure that the concentration of the diatomite in the biochemical reaction zone is 200-400 mg / L, so that the concentration of the diatomite in the biochemical reaction zone is 200-400 mg / L; the inhibition of low-temperature sludge bulking can be realized; the diatomite dispersion liquid is obtained by fully dispersing diatomite with the particle size of 2-50 microns in water. The invention provides a more economical and efficient method for controlling low-temperature sludge bulking.

The present application belongs to the field of sewage biological treatment technology, and particularly relates to a method for quickly and quantitatively regulating and controlling the sludge settling property of filamentous bacteria by using attapulgite micro-powder. The present application can quickly improve the settling performance of bulking sludge, and has the advantages of simple process, convenient operation, low operation cost and good engineering application prospect. The present application is not dependent on the identification of the type of sludge bulking, and is not affected by the sludge concentration, and is suitable for various types of bulking sludge. The attapulgite has good adaptability to different types of sludge, can significantly improve the settling performance of the sludge, and the sludge concentration is linearly related to the attapulgite dosage, which is convenient for regulation and control. The present application uses micron-sized attapulgite to improve the settling property of filamentous sludge, and the attapulgite is loaded on the bacterial filaments to realize the co-settling of the sludge and the attapulgite, effectively improve the flocculation structure of the sludge, and further improve the settling performance of the sludge.

The wine brewing wastewater conversion system provided by the utility model comprises a closed reaction zone, a filtering device and a liquid circulation system. The closed reaction zone receives wine brewing wastewater and corresponding reactants and active matters, the pH value of the wine brewing wastewater is adjusted to a proper interval, organic matters in the wine brewing wastewater are converted by using the active matters, and then the converted clear liquid is fed into the reaction zone by circularly supplementing the reactants and the active matters in an overflowing and filtering manner. Through uninterrupted circulating conversion, muddy water and sediment which are rich in carbon and nitrogen elements and can be converted by a conventional high-concentration organic biochemical treatment mode are obtained, and harmless conversion is achieved by performing conventional high-concentration organic biochemical treatment on the muddy water and sediment. The pH of the reaction bin is adjusted through hydrogen peroxide and ozone, the microbial conversion efficiency can be improved, the conversion problem of the wine brewing wastewater is solved, sludge bulking is controlled through a liquid circulation system, COD parameters of effluent are reduced, and harmless conversion is achieved.

The application discloses a method for full-load operation of an oxidation ditch system during a sludge expansion period, and the oxidation ditch system comprises a pretreatment zone, an oxidation ditch and a secondary sedimentation tank, and comprises the following steps: opening a water inlet valve of the oxidation ditch, and re-injecting sewage treated by the pretreatment zone; meanwhile, clear water in the upper layer of the oxidation ditch is discharged to the secondary sedimentation tank; the water inlet valve of the oxidation ditch is closed, all pushers in the oxidation ditch are opened, the newly-injected sewage is mixed with the original sludge-water mixture, and the mixture is circulated and flows in the oxidation ditch to perform an anaerobic reaction and release phosphates; then, an aeration system in the oxidation ditch is opened, and the sewage in the oxidation ditch is circulated to perform an aerobic-anoxic working condition; the aeration system and the pushers in the oxidation ditch are closed to perform static sedimentation; and the intermittent operation is repeated. The application controls the expanded sludge in the oxidation ditch, thereby reducing the influence of the expanded sludge on the secondary sedimentation, and enabling the oxidation ditch process to normally produce at full load during the sludge expansion period in winter.

The invention discloses a hydrolytic acidification reactor capable of controlling the height of a sludge bed and a hydrolytic acidification treatment method, and relates to the technical field of sewage treatment. The hydrolytic acidification reactor comprises a reactor main body, a central vertical shaft, a water distribution system, a control system and a water quality detection system; the central vertical shaft is vertically arranged inside the reactor main body, and the central vertical shaft is communicated with an external sewage pipeline; the water quality detection system is connected with the signal input of the control system, the water quality detection system is used for detecting COD of a water body before and after a reaction and the suspended matter concentration of a clear water area in real time, and the control system is used for receiving a signal sent by the water quality detection system and adjusting the stirring frequency and the stirring strength of the water distribution device according to the received signal; the height of the sludge bulking bed is controlled. The hydrolytic acidification reactor can dynamically adjust the height of a sludge bulking bed in the reactor so as to achieve the effects of high mass transfer, hardening prevention and strong interception.

The utility model belongs to the technical field of sewage treatment, and particularly relates to a novel milk factory wastewater treatment system. The wastewater treatment system comprises a grating, an adjusting tank, an air floatation tank, a hydrolysis acidification tank, an anoxic tank, a contact oxidation tank, a vertical flow sedimentation tank, a coagulative precipitation tank, a common rapid filter tank and a disinfection tank which are sequentially connected, the hydrolysis acidification tank, the vertical flow sedimentation tank, the coagulative precipitation tank and the common rapid filter tank are communicated with a sludge collecting well, and the sludge collecting well is sequentially communicated with a sludge concentration tank and a dehydration room. And the hydrolysis acidification pool is sequentially connected with a water-sealed tank, a buffer tank and a gas holder. The milk factory wastewater treatment system disclosed by the utility model has a good treatment effect on milk factory wastewater, and the effluent quality index meets the primary standard in Integrated Wastewater Discharge Standard. The whole process has the advantages of high high-concentration organic wastewater treatment efficiency, impact load resistance, difficulty in sludge bulking, low operation cost, good effluent quality, stable operation and low energy consumption, and is an economical and reasonable treatment system.

This utility model relates to a device for solving sludge bulking, comprising a cylindrical screening chamber, a conical screening chamber, an impeller, a motor, a bell-shaped inlet, and a bushing. The motor is located on the outer front end of the cylindrical screening chamber. An inlet is located at the top of the cylindrical screening chamber, and the rear end is connected to the conical screening chamber. An impeller is located at the inner end of the cylindrical screening chamber, and the motor shaft is connected to the impeller. The bell-shaped inlet is located at the front end of the impeller, and the narrow end of the bell-shaped inlet is connected to the bushing. The bushing passes through the cylindrical screening chamber, and an overflow port is provided on the bushing on the outer side of the cylindrical screening chamber. Under the centrifugal force of the impeller, high-quality sludge enters the conical screening chamber, while low-quality sludge enters the bell-shaped inlet. This device does not rely on the addition of chemicals, nor does it require changes to the operating conditions of the biological treatment tank. The obtained high-quality sludge has a large particle size, low filamentous bacteria content, and good settling performance, thus avoiding sludge bulking and solving the sludge bulking problem caused by low-quality sludge.

The present application belongs to the field of environmental engineering sewage treatment technology, and discloses a sludge settling process filamentous bacteria enrichment degree rapid detection method and system. First, a set of full-automatic sludge settling process image intelligent extraction device is constructed, which can automatically take pictures of the sludge settling process under fixed frequency and light conditions to generate standardized image sequences. Secondly, a database covering various actual sewage treatment processes and laboratory reactors is constructed, and the filamentous bacteria enrichment degree of each sample is marked by three levels of artificial marking. Finally, an end-to-end deep learning analysis model is trained based on the database, which extracts three time period features in parallel through a three-channel ResNet-101 network, and outputs the filamentous bacteria enrichment degree prediction by a fully connected classifier after feature fusion. The present application realizes the standardization, automation and intelligentization of the detection process, and provides a fast, objective and reliable tool for sludge bulking early warning of sewage treatment plants.

The application provides an integrated gas-lift reactor and method for separating target based on high-activity granular sludge, reaction period of the gas-lift reactor is divided into sludge expansion suspension stage and sludge sedimentation reflux stage, through the settling rate of the granular sludge in each stage and the apparent gas velocity of the liquid phase, the expansion rate difference value of the sludge bed in the reactor between adjacent stages is determined; according to all the expansion rate difference values and the distribution density of different height regions, the particle size grading and activity layering characteristics of the granular sludge in the reactor are determined, and then the sludge loss amount of the effluent outlet is predicted according to the particle size grading and the activity layering characteristics, so as to obtain the retention enrichment effect evaluation value of the granular sludge; when the retention enrichment effect evaluation value is lower than the preset evaluation threshold value, the gas-lift aeration amount of the reactor bottom and the liquid phase circulation rate in the draft tube are balanced in stages. Based on the above scheme, the balanced separation and retention of the high-activity granular sludge can be realized.

The invention discloses an efficient carbon reduction reactor which comprises a main reactor, a front-end sludge interception pool arranged at the front end of the main reactor and a rear-end sludge interception pool arranged at the rear end of the main reactor, and the front-end sludge interception pool is used for carrying out sludge interception on sewage before the sewage enters the main reactor; the rear-end sludge interception tank is used for carrying out sludge interception on sewage discharged from the main reactor, and the main reactor is used for culturing carbon reduction reaction exclusive sludge and is provided with an aeration system. The efficient carbon reduction reactor has the advantages of high reaction efficiency, strong anti-interference capability and the like, the sludge concentration can be greatly increased without worrying about sludge bulking, the sludge bulking risk is effectively reduced, the sludge age and the sludge concentration are convenient to control, and the working condition control difficulty is low.

This invention relates to a continuous flow urban wastewater treatment device and method for preventing sludge bulking. It can reduce the risk of excessive proliferation of filamentous bacteria, enhance the sludge granulation degree in the continuous flow system, and improve sludge settling performance. The technical solution is to first use some of the organic matter in the wastewater for denitrification and phosphorus release in the pre-anoxic tank, and then further consume the remaining organic matter in the wastewater through denitrification in the intermediate anoxic tank. This enriches polyphosphate-accumulating bacteria and reduces the organic matter concentration in the aerobic tank to inhibit the growth of filamentous bacteria. The aerobic tanks are operated in series to improve the reaction rate and reduce aeration energy consumption. Polyphosphate-accumulating bacteria are enriched in sludge with excellent settling properties, which can also promote sludge granulation and further improve sludge settling performance.

The application discloses a degradable carbon source and a preparation method and application thereof, and belongs to the technical field of water treatment. The preparation method comprises the following steps: adding hyperbranched quaternary ammonium salt polymer and zeolite into water, setting the temperature to 45-50 DEG C, stirring for 3h, removing water through reduced-pressure concentration, and obtaining a solid carrier; crushing and uniformly mixing high-density polyethylene, degradable polymer, plant fiber and the solid carrier, and extruding into a shape in an injection molding machine to obtain the degradable carbon source. The solid carbon source with slow-release effect is selected, various auxiliary materials are added in the high-density polyethylene, the hydrophilicity, biological affinity and positive electricity of the carbon source are improved, the adhesion effect between microorganisms and the carbon source is improved, the solid carbon source serves as a biofilm carrier for the growth of microorganisms, the problem that liquid carbon source addition is prone to overaddition is solved, secondary pollution and sludge bulking are reduced, and the denitrification performance is improved.

The application discloses a low C / N ratio domestic sewage high-efficiency denitrification and dephosphorization treatment method, which comprises the following steps: increasing the anoxic reaction time, setting two anoxic reaction zones, introducing double nitration liquid reflux, adjusting the double nitration liquid flow distribution according to the influent C / N ratio, strengthening the denitrification and dephosphorization technology, combining with a carbon source precise feeding system to ensure the deep denitrification and dephosphorization of the whole process; on the other hand, setting an MBBR nitrification treatment unit, the suspended filler can provide a good carrier for nitrifying bacteria, ensure the enrichment conditions of long sludge age of nitrifying bacteria, and the nitrification liquid is refluxed to the anoxic zone for denitrification; the method can avoid the sludge bulking problem under the long anoxic and low load operation conditions, can fully utilize the carbon source of raw water, save the aeration amount, realize the precise feeding of the carbon source, save the energy consumption and the drug consumption, and is suitable for the deep denitrification and dephosphorization standard upgrading and reconstruction of a municipal sewage treatment plant, and has a wide market application prospect.

The invention discloses an aeration control system and method based on a visual algorithm, and belongs to the technical field of intelligent control of sewage treatment. According to the method, foam morphological characteristics, dynamic characteristics and statistical characteristics are introduced, aeration quantity prediction is carried out in combination with aeration equipment parameters and water quality index characteristics, a predicted value is corrected by using a random forest, and compared with traditional DO single-parameter control, the method can reflect the aerobic state of microorganisms in real time and provide accurate aeration quantity control; invalid aeration is avoided through accurate aeration, and energy consumption is greatly reduced; in addition, sludge bulking can be regulated and inhibited through real-time feedback, and the operation stability of the system is improved. According to actual measurement of a sewage plant, after the control method is adopted, the removal rate of organic matters in the sewage is effectively increased, and the sludge index and the sludge bulking occurrence rate are greatly reduced, so that the control method can be widely applied to intelligent control of various sewage treatment.

This invention relates to an emergency control method for microfilamentous sludge bulking, comprising the following steps: Chemical dosing: Chemicals are added to the returned sludge according to a first predetermined process; Process monitoring: Monitoring is performed at the end of each dosing cycle, with monitoring indicators including but not limited to total effluent quality, settling performance of the mixed liquor in the biological treatment tank, and microscopic examination of the mixed liquor at the biological treatment tank effluent outlet; If the last monitoring indicator in S2 is qualified, the chemical dosing is terminated; If the last monitoring indicator in S2 is unqualified, the second stage of chemical dosing in the returned sludge is initiated: Chemicals are added to the returned sludge according to a second predetermined process. Its beneficial effects are: significantly shortening the time required to inhibit microfilamentous sludge bulking; lowering the technical application threshold, as this technical solution can be immediately implemented under the existing wastewater treatment process conditions without additional adjustments to process conditions and parameters, ensuring controllable implementation risks and facilitating widespread application.

The invention discloses a preparation method and application of quorum sensing quenching agent-embedded chitosan sustained-release gel particles, relates to the technical field of biological sewage treatment, and in particular relates to a preparation method and application of quorum sensing quenching agent-embedded chitosan sustained-release gel particles. The invention aims to solve the technical problem of low-temperature sludge bulking in a sewage plant. The prepared composite slow-release gel particles take chitosan gel as a carrier, and the quorum sensing quenching agent vanillin is embedded in the chitosan gel, so that the quorum sensing quenching agent vanillin and a flocculation component chitosan can be continuously and slowly released in a sewage treatment system; therefore, the synergism of long-acting source inhibition of sludge EPS secretion and instant continuous flocculation of sludge flocs is realized, the problem of sludge bulking under low-temperature and low-carbon-nitrogen-ratio conditions is fundamentally improved in a long-acting manner, SVI and SV30 can be remarkably reduced under the low-temperature and low-carbon-nitrogen-ratio conditions, sludge bulking is inhibited, and stable operation of a system is guaranteed.

The invention relates to a method and a system for treating high-ammonia-nitrogen high-organic sewage and synchronously recycling carbon and nitrogen, the method comprises the following steps: inhibiting the growth of sludge bulking microorganisms in the sewage by utilizing the alternation of an anaerobic environment and an aerobic environment, and removing ammonia oxidizing microorganisms in the sewage by controlling the retention time of the sewage in the anaerobic environment and the aerobic environment. The method comprises the following steps: screening and domesticating sludge carbon entrapped microorganisms, and promoting rapid metabolism and proliferation of the carbon entrapped microorganisms by utilizing an aerobic environment, so that organic matters in sewage are rapidly captured, sludge is discharged, high-ammonia-nitrogen low-carbon effluent is obtained, carbon-nitrogen separation of the sewage is realized, the high-ammonia-nitrogen low-carbon effluent is subjected to ammonia concentration treatment to obtain ammonia-rich concentrated water and recycled water, and the recycled water is recycled. Performing ammonia recovery treatment on the ammonia-rich concentrated water to realize ammonia nitrogen recovery. The system comprises an ammonia protection and carbon interception unit, an ammonia concentration unit and an ammonia recovery unit. According to the invention, carbon and nitrogen separation can be effectively realized while mud-water separation of high-ammonia-nitrogen high-organic sewage is realized, and the separated carbon and nitrogen are recycled and recycled.

The invention relates to the technical field of industrial wastewater treatment, in particular to an epoxypropane production wastewater treatment process which comprises the following steps: S1, pretreatment; s2, primary biochemical treatment; s3, carrying out secondary solid-liquid separation; s4, deep biochemical treatment; s5, final precipitation; according to the method, through the combined process of pretreatment, biochemical treatment, deep treatment and sludge treatment, technological parameter control is combined, and the polymeric silicate agent and the additive are matched, so that the problems of low biochemical efficiency, sludge bulking, unstable effluent quality and the like when the epoxypropane wastewater is treated by a traditional method are solved; through optimization of two additives and a biochemical system, metabolism and decomposition of specific pollutants by microorganisms are promoted, it is ensured that the chemical oxygen demand of effluent stably reaches the standard, and the yield of residual sludge is reduced through an optimized sludge backflow path.