81 results about "Sludge bulking" patented technology

The invention discloses a culture method of anaerobic ammonia oxidation granular sludge with a polydopamine modified charcoal-loaded Fe-Cu sodium alginate microsphere kernel, which comprises the following steps: modifying charcoal by using polydopamine, then carrying out Fe-Cu ion loading, finally preparing sodium alginate microspheres, and taking the prepared sodium alginate microspheres as the kernel to prepare the anaerobic ammonia oxidation granular sludge with the polydopamine modified charcoal-loaded Fe-Cu sodium alginate microsphere kernel. And co-culturing the sodium alginate microspheres and activated bacillus DMF-4 in an oxygen-free environment, continuously culturing for 3 weeks, and collecting by using a gravity settling or centrifugal method to obtain the anaerobic ammonium oxidation granular sludge with the sodium alginate microsphere core. The sodium alginate microspheres serving as the core provide large density and good morphological support for sludge particles, the problem of sludge bulking is avoided, and the settling performance is improved. According to the present invention, the sludge anti-shearing performance is improved, the adsorption capacity of the slowly released and continuously slowly released iron ions on organic matters, ammonia nitrogen and heavy metals is enhanced, the sewage treatment effect is improved, and the iron ions are the biodegradable material so as not to cause secondary pollution in the use process.

The air supply type jet aerator comprises a water inlet pipe, one end of the water inlet pipe is connected with an air inlet unit through a first connecting pipe, and the end, away from the first connecting pipe, of the air inlet unit is connected with a second-stage mixing pipe through a second connecting pipe; the end, away from the second connecting pipe, of the second-stage mixing pipe is connected with a third-stage mixing pipe through a third connecting pipe, the end, away from the third connecting pipe, of the third-stage mixing pipe is connected with a spray head through a fourth connecting pipe, the inner wall of the water inlet pipe is connected with a loop assembly, and the inner wall of the second-stage mixing pipe is connected with a contraction unit. And the inner wall of the third-stage mixing pipe is connected with a turnover crushing mechanism. The invention also discloses a jet aeration method of the air supply type jet aerator with porous air inlet and compression circulation. The air supply type jet aerator solves the problem that the existing air supply type jet aerator is easy to cause sludge bulking.

The invention discloses a treatment device and process based on zero discharge of high-concentration coating wastewater, wastewater passes through an adjusting tank and then enters a pretreatment module through a pipeline, the coating wastewater passes through a Fenton tank body, a coagulation tank body and a primary sedimentation tank of the pretreatment module in sequence through the pipeline to be treated, and the coating wastewater is continuously conveyed to a biochemical treatment module; the biochemical treatment module is used for carrying out anaerobic environment treatment through an anaerobic granular sludge bulking bed and then carrying out aerobic environment treatment through an aerobic aeration tank; and introducing the wastewater into a secondary sedimentation tank to separate the formed sludge from water, entering a biochemical tank, carrying out ultrafiltration and reverse osmosis treatment through a deep treatment module, recycling the treated wastewater to a production line, and recycling the generated condensate water and RO fresh water. The adopted wastewater treatment device is combined and optimized by various advanced technologies, so that the treatment efficiency and the water quality are improved, efficient recovery and reutilization of resources are also realized, and the system has good economic benefits and environmental benefits and is suitable for the requirements of modern coating wastewater treatment.

The invention discloses a preparation method of a polydopamine modified biochar loaded Fe-Cu sodium alginate microsphere, which comprises the following steps: preparing biochar, modifying the biochar by using polydopamine, then loading the polydopamine modified biochar by using Fe-Cu, and finally obtaining the polydopamine modified biochar loaded Fe-Cu sodium alginate microsphere. According to the preparation method, the sodium alginate microspheres with different particle sizes can be prepared, the prepared sodium alginate microspheres have the function of adsorbing ammonia nitrogen, nitrate nitrogen, chlorobenzene, phosphorus, chromium ions and lead ions, the sodium alginate microspheres are used as the inner core to prepare anaerobic ammonia oxidation granular sludge, large density and good morphological support are provided for sludge particles, the problem of sludge bulking is avoided, and the anaerobic ammonia oxidation granular sludge can be prepared by using the sodium alginate microspheres as the inner core. The sewage treatment agent has the advantages that the settling performance is improved, the adsorption capacity on organic matters, ammonia nitrogen and heavy metals is enhanced, the sewage treatment effect is improved, and meanwhile, the sewage treatment agent is a biodegradable material and does not cause secondary pollution in the use process.

The invention relates to the technical field of sewage treatment, in particular to a biological phosphorus removal method for wastewater by adopting anoxic starvation treatment. The method comprises the following steps: carrying out sludge domestication on a mixture of activated sludge and wastewater to be treated, and then carrying out anoxic starvation treatment; wherein the activated sludge contains fermentation type phosphorus-accumulating bacteria, the initial abundance of the fermentation type phosphorus-accumulating bacteria is 0.5%-1.5% before the sludge domestication, and a mixture of the activated sludge and to-be-treated wastewater is soaked in a solution containing nitrite nitrogen during the anoxic starvation treatment. According to the method, the abundance of the fermentation type phosphorus-accumulating bacteria is increased and proliferation of filamentous bacteria is inhibited through anoxic starvation treatment, so that sludge bulking is effectively inhibited, and the high-abundance fermentation type phosphorus-accumulating bacteria can promote the performance of a biological phosphorus removal system and improve the sewage treatment effect.

The invention relates to the field of environmental engineering and technology, and discloses a coprocessing method for coking wastewater based on MBR (membrane bioreactor) technology, which sequentially comprises the steps of pretreatment, biological enhancement treatment, nitrogen and phosphorus removal treatment, sludge regulation and control treatment, membrane pollution control treatment and circular treatment, and comprises the following steps: introducing coking wastewater into a grating and a grit chamber; performing pretreatment to remove large-particle impurities; in the biological enhancement and nitrogen and phosphorus removal stage, a microbial agent is added to regulate and control the reaction environment so as to improve the pollutant degradation efficiency; accurate management and control of sludge performance and membrane pollution are realized by using an online monitoring technology; finally, sludge, cleaning wastewater and the like generated in all links are collected in a classified mode, the sludge is subjected to resource utilization after stabilization treatment, the cleaning wastewater is reused in the pretreatment stage, and a closed-loop treatment system is formed; through the steps, the problems of incomplete removal of COD (Chemical Oxygen Demand) and ammonia nitrogen, low removal rate of total nitrogen and total phosphorus, sludge bulking, fast membrane pollution and high risk of secondary pollution in the traditional process are effectively solved.

The present invention provides a wastewater treatment system and a wastewater treatment process, belonging to the technical field of wastewater treatment. The wastewater treatment system provided by the present invention uses activated sludge combined with quartz sand and an algal-bacterial symbiont, which can overcome the problems in the prior art that sludge bulking affects the effluent water quality and harms the operation of the biochemical system, and can also improve the wastewater remediation effect. The wastewater treatment process provided by the present invention can significantly reduce the chemical oxygen demand (COD), biochemical oxygen demand (BOD) and suspended solids (SS) in the wastewater to be treated. The removal rate of chemical oxygen demand (COD) can reach 94.87% within 4 h, the removal rate of biochemical oxygen demand (BOD) can reach 96.60%, and the removal rate of suspended solids (SS) can reach 96.58%. The best removal efficiency can be achieved in a relatively short treatment time, which is beneficial to accelerating the wastewater treatment process.

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 utility model relates to the technical field of wastewater treatment and reuse, and discloses a power plant sludge drying condensation wastewater treatment and reuse system, which comprises an adjusting tank, a heat exchanger, an air flotation machine, a hydrolysis acidification tank, at least one A / O unit and a flocculation sedimentation tank which are sequentially arranged along the wastewater flowing direction, each A / O unit comprises an A / O reaction tank and a sedimentation tank, the A / O reaction tank comprises an anoxic tank and an aerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank are sequentially arranged along the flowing direction of wastewater, and filler for attachment of microorganisms is arranged in the aerobic tank. According to the system provided by the utility model, an A / O method and a biological contact oxidation method are combined together, so that the process treatment capacity is large, the sludge generation amount is small, sludge bulking cannot be generated in the operation process, the stability of the effluent quality can be ensured, the one-time investment and the operation cost can be reduced, and the occupied area is reduced; the system can effectively remove suspended matters, COD (Chemical Oxygen Demand), ammonia nitrogen, total phosphorus and the like in the sludge drying and condensing wastewater, and effluent reaching the standard can be recycled to a power plant.

The invention relates to the technical field of chemical wastewater treatment, and particularly discloses a comprehensive treatment method of sulfur-containing waste alkali, which comprises the following steps: S1, a pretreatment step: storing sulfur-containing waste alkali liquor in an adjusting and homogenizing tank for homogenizing treatment, and then pumping the sulfur-containing waste alkali liquor to a deoiling and diluting tank for standing separation to remove oil and solid impurities; s2, a wet oxidation (WO) step: pressurizing the pretreated waste alkali liquor to 60 bar through a booster pump, mixing the pretreated waste alkali liquor with compressed air with the flow of 230 Nm < 3 > / h, heating the mixture to 178 DEG C through a preheater, enabling the mixture to enter a reactor, carrying out oxidation reaction under the conditions of 200-240 DEG C and 3-5 barg for 30-60 minutes, cooling a reaction product, and enabling the cooled reaction product to enter a gas-liquid separator for separation; through the effects of wet oxidation, evaporative crystallization and chemical oxidation, organic matters and sulfides in the sulfur-containing waste alkali liquor can be efficiently degraded, the COD removal rate is remarkably increased, meanwhile, the common problems of sludge bulking, water quality fluctuation sensitivity and the like in traditional biological treatment are avoided, and the stability and reliability of the treatment process are ensured.

The present invention provides a biological filler, a preparation method, and its application in sewage treatment. The method involves biologically treating slag produced during the beneficiation of low-grade sulfide ore, followed by drying and screening to obtain a target filler required for the sulfur autotrophic denitrification process. Since the target filler primarily comprises pyrite, pyrrhotite, and metal-deficient polysulfides, it can provide the energy required for the growth and metabolism of iron-sulfur autotrophic denitrification bacteria, thereby achieving efficient removal of ammonia nitrogen, COD, total phosphorus, and a small amount of heavy metals, effectively reducing pollutant emissions from industrial and domestic wastewater. The method also produces virtually no sludge, avoiding sludge bulking and subsequent disposal. Furthermore, the method effectively utilizes waste rock and tailings generated by mining activities as resources, reducing land use and the generation of solid waste.

The present application relates to the field of sewage treatment, in particular to a method for solving sludge bulking of sewage treatment system in winter, comprising the following steps: 1, judging the cause of sludge bulking, detecting the sewage index, activated sludge index and reclaimed water quality index, and judging the degree of sludge bulking; 2, sludge bulking treatment, intermittent aeration and oxygenation according to the degree of sludge bulking, adding O3 to kill part of filamentous bacteria, adding wood ash, accelerant and organic biological complexing agent, increasing the adhesion of activated sludge and the number of microorganisms; 3, discharge activation, using a small low-voltage discharge device, passing a small current into the sewage tank, and exciting microbial activity through the current; 4, intermittent pumping of sewage, the step comprising starting the sewage pump, intermittent pumping of sewage, until the activated sludge settling ratio of the aerobic tank is greater than 40%. The present application has the advantages of simple operation, low investment and stable effect, and can solve the problem of sludge bulking of the sewage treatment system in a short time.

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 denitrification dephosphorization and denitrification system comprises an anaerobic tank, an aerobic tank and an SBR (sequencing batch reactor) tank, the anaerobic tank is communicated with the aerobic tank through a first pipeline, and the aerobic tank is communicated with the SBR tank through a second pipeline; the first sludge pump is communicated with the anaerobic tank and the bottom of the SBR tank through a third pipeline, the second sludge pump is communicated with the anaerobic tank and the bottom of the SBR tank through a fourth pipeline, the first sludge pump is used for pumping sludge at the bottom of the anaerobic tank into the SBR tank, and the second sludge pump is used for pumping sludge at the bottom of the SBR tank into the SBR tank. The second sludge pump is used for pumping sludge at the bottom of the SBR tank to the anaerobic tank; the fourth pipeline is provided with a blow-off pipeline communicated with the outside; according to the utility model, the problems that the operation stability is poor, the sludge bulking and the sludge loss are easy to occur and the separation effect is not ideal enough due to the absence of a sludge return system in the traditional SBR process can be solved.

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 utility model discloses sludge bulking prevention equipment for an oxidation ditch, which belongs to the technical field of oxidation ditch equipment and particularly comprises an oxidation ditch, an aeration component and a clearing component, the removing assembly comprises an alkaline assembly which is arranged below the oxidation groove and is connected with the oxidation groove through a pipeline, and a scraping assembly which swings in the oxidation groove is arranged above the injection end of the alkaline assembly; the aeration assembly comprises a fixing rod which is arranged above the scraping assembly and is in the horizontal transverse direction, the surface of the fixing rod is sleeved with a plurality of fixing rings, the upper ends and the lower ends of the fixing rings are rotationally connected with rotating rods in the direction perpendicular to the fixing rod, and one end of each rotating rod is rotationally connected with a sleeve plate; the rotating end of the sleeve plate is rotatably connected with a push plate, one end of the push plate is fixedly connected with a double-acting air cylinder, and the surface of the rotating rod is rotatably connected with a swing blade. The swing type sludge water body aeration device can swing sludge water body aeration, improve the sludge treatment effect, and meanwhile can alkalify to reduce sludge formation and prevent sludge bulking.

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 invention relates to the technical field of wastewater purification and treatment, and discloses a livestock breeding wastewater treatment and purification device, comprising a base plate for supporting the livestock breeding wastewater treatment and purification device, a device main body is arranged on the top of the base plate, and the device main body comprises: a driving device, which is arranged on the top of the base plate, the driving device is used to provide power for the normal opening of subsequent components while reducing the overall energy consumption of the device, reducing the overall cost of the device, and being convenient for users to use; a treatment device, which is fixedly connected to the top of the base plate, the treatment device is used to purify livestock breeding wastewater while improving the purification effect of livestock breeding wastewater, avoiding the situation in which sludge swelling occurs in the device when purifying wastewater, resulting in a reduction in the overall purification effect of livestock breeding wastewater, and is convenient for users to use. The device has the advantages of avoiding sludge swelling, improving the purification quality of the device, and being convenient for users to use.

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.

The present invention relates to the technical field of sewage treatment, and in particular to a method for biological phosphorus removal from wastewater using anoxic starvation treatment. The method performs sludge acclimation on a mixture of activated sludge and wastewater to be treated, and then performs anoxic starvation treatment; wherein the activated sludge contains fermentative polyphosphate bacteria, and before the sludge acclimation is performed, the initial abundance of the fermentative polyphosphate bacteria is 0.5%-1.5%, and during the anoxic starvation treatment, a solution containing nitrite nitrogen is used to soak the mixture of the activated sludge and wastewater to be treated. The method increases the abundance of fermentative polyphosphate bacteria and suppresses the proliferation of filamentous bacteria through anoxic starvation treatment, thereby effectively suppressing sludge swelling. The high abundance of fermentative polyphosphate bacteria can promote the performance of the biological phosphorus removal system and improve the sewage treatment effect.

The utility model relates to the technical field of wastewater treatment, and discloses a system for treating and recycling high-ammonia-nitrogen sludge drying condensation wastewater in a power plant, which comprises an adjusting tank, a heat exchanger, an air flotation machine, a hydrolysis acidification tank, an A / O unit, a denitrification biological filter and a flocculation sedimentation tank which are sequentially connected along the flowing direction of the wastewater, the A / O unit comprises an A / O reaction tank and a sedimentation tank, the A / O reaction tank comprises an anoxic tank and an aerobic tank, the anoxic tank, the aerobic tank and the sedimentation tank are sequentially arranged along the flowing direction of the wastewater, and a filler for attachment of microorganisms is arranged in the aerobic tank. According to the system provided by the utility model, an A / O method and a biological contact oxidation method are combined together, so that the process treatment capacity is large, the sludge generation amount is small, sludge bulking cannot be generated in the operation process, the stability of the effluent quality can be ensured, and the operation cost can be reduced; the system can effectively remove suspended matters, COD (Chemical Oxygen Demand), ammonia nitrogen, total phosphorus and the like in the sludge drying and condensing wastewater, and is particularly suitable for treating high-ammonia-nitrogen sludge drying and condensing wastewater.

The present invention relates to the technical field of sewage treatment, and specifically to a method for evaluating the settling performance of activated sludge and controlling sludge bulking. The method of the present invention evaluates the settling performance of activated sludge by defining a "sludge escape index" SEI, and makes corresponding process adjustments based on the evaluation results, thereby slowing down or even avoiding sludge bulking. In the method of the present invention, when the sludge is slightly expanded, the solid surface load of the secondary sedimentation tank is reasonably adjusted; when the sludge is moderately expanded, micropowder is added to aid sedimentation; when the sludge is severely expanded, additional flocculants are added to improve the sludge settling performance; when the sludge is severely expanded, emergency measures such as adding a carbon source are adopted for treatment. Through the method of the present invention, the settling performance of the sludge in the secondary sedimentation tank can be effectively evaluated, and sludge bulking can be controlled in a timely and effective manner, which is of great significance to maintaining the stable operation of the production process.

The invention discloses a rapid treatment combined device for abnormal operation of a high-activity sludge process in industrial sewage treatment. The rapid treatment combined device comprises a biochemical pool, a total activated sludge distribution device, a pulse gas stripping sludge discharge device and a gas-solid-liquid separator, wherein at least one pulse gas stripping sludge discharge device is arranged in each biochemical pool; the main activated sludge distribution device comprises a main activated sludge pipe, a plurality of sludge inlet branch pipes are arranged on one side of the main activated sludge pipe, a plurality of sludge outlet branch pipes are arranged on the other side of the main activated sludge pipe, sludge inlets of the sludge inlet branch pipes are connected with a sludge outlet of the gas-solid-liquid separator, and sludge outlets of the sludge outlet branch pipes extend into the biochemical pool; a distribution sludge discharge automatic valve is arranged on each sludge discharge branch pipe, and a gas stripping sludge discharge automatic valve is arranged on an outlet pipeline of each pulse gas stripping sludge discharge device. The problems of sludge bulking, aging, sludge floating and poor settleability can be rapidly solved, it can be ensured that biochemical activated sludge rapidly recovers normal operation and treatment efficiency, and long-period safe operation is achieved.

The invention relates to a method for preventing viscous sludge from bulking and blocking a denitrification system, which is characterized in that a plate frame tank is arranged between a secondary sedimentation tank and a filter tank and is used for intercepting the sludge in a viscous bulking state; the method comprises the following steps: collecting a plate frame filler adhered with viscous bulking sludge, carrying out air blast and chemical micro-stimulation, refluxing generated growth factors for promoting the bulking of the viscous sludge to a biochemical pool, shortening the hydraulic retention time of the biochemical pool, promoting the bulking and outbreak of the viscous sludge, and carrying out physical separation on the viscous sludge, so that the treatment period of the bulking of the viscous sludge can be shortened; the invention provides a simple, energy-saving, economical and easy-to-control water treatment process for relieving viscous sludge bulking.

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.