293 results about "Sludge settling" patented technology

The invention discloses an intelligent monitoring system for sewage treatment in the coal chemical industry, and relates to the technical field of sewage treatment.The intelligent monitoring system is characterized in that a water quality monitoring unit is used for collecting parameters such as COD, turbidity, pH and heavy metal ion concentration in real time, the change trend of water quality in a short time is predicted through a long-short term memory (LSTM) network, and then adding parameters of a flocculating agent are dynamically calculated; the defects of a fixed adding curve or artificial experience adjustment are overcome, so that the adding amount, the type and the speed of the flocculating agent can be adaptively adjusted to be matched with the change of sewage components; the addition optimization unit is combined with a CNN-LSTM model to analyze the rheological characteristics of the sludge, so that the addition of the flocculating agent adapts to the rheological change of the sludge, the flocculation effect is optimized, and the sludge settling performance is improved; meanwhile, the stirring control unit adjusts the stirring strength and time in real time based on ultrasonic online monitoring data, so that the flocculating agent is fully dispersed, the particle distribution state is optimized, the flocculation reaction is more uniform, and the subsequent precipitation separation efficiency is improved.

The invention relates to the technical field of sewage control, in particular to a control method and system of sewage treatment equipment and a medium. The method comprises the following steps: arranging a buffer cavity made of a flexible material at the water inlet end of sewage treatment equipment; the volume of the buffer cavity is adjusted in real time according to the original water inlet flow, and a flexible buffer cavity volume dynamic adjustment strategy is obtained; if the flexible buffer volume dynamic adjustment strategy executes the volume adjustment of the buffer cavity, evaluating the water outlet stability degree of the buffer cavity to obtain buffer effect evaluation data; a miniature electromagnetic valve is used for controlling the inlet opening degree of a reactor unit in the sewage treatment equipment, and the water inlet flow of the reactor unit is controlled to be balanced; and adjusting the porosity of the reactor unit partition plate to realize dynamic control and adjustment of sludge sedimentation. By dynamically adjusting the volume of the buffer cavity, water inlet flow fluctuation is effectively buffered, fine control over sludge sedimentation is achieved, and the impact resistance and operation stability of sewage treatment equipment are remarkably improved.

The invention relates to the technical field of sewage treatment optimization, in particular to an intelligent sewage plant full-process management and control method based on digital twinning, which comprises the following steps: acquiring concentration data to calculate rate clustering fluctuation, setting a threshold value mark stable section to analyze sedimentation association, constructing dynamic threshold value output control information, and adjusting stirring to generate a sludge discharge instruction set. According to the method, through the time sequence clustering of the concentration change rate, the stable section in the sludge sedimentation process is identified, the concentration fluctuation identification precision is improved, the sedimentation hysteresis is judged based on the time difference between the sedimentation track and the standard curve, the particle layering identification capability is improved, and the dynamic threshold matrix is constructed by using the correlation degree and the particle size data; the concentration range, the settling velocity deviation and the particle size distribution dispersion are fused, the multidimensional property of a regulation and control basis is enhanced, the interface position movement trend is combined, the concentration range is matched, a stirring intervention instruction is output, real-time regulation and accurate control of the layered settling process are achieved, and the treatment stability and the reaction time efficiency are improved.

The utility model relates to a filler-added continuous flow and sequencing batch aerobic granular sludge water treatment system, which sequentially comprises a first hydrolysis acidification tank, an anaerobic tank, a sludge flocculation tank, an aerobic granular sludge reaction tank, a sludge selection tank and a secondary sedimentation tank along the water flow direction of wastewater to be treated when the continuous flow aerobic granular sludge water treatment system is adopted, when the sequencing batch type aerobic granular sludge water treatment system is adopted, a second hydrolysis acidification tank, an effluent regulating tank and a sequencing batch type aerobic granular sludge reaction tank are sequentially arranged in the water flow direction of wastewater to be treated. According to the utility model, the hemispherical microbial carrier filler is added to form a crystal nucleus, so that self-agglomeration of microorganisms inside and outside is accelerated to form a granular biopolymer; the technical effects of high pollutant removal rate, high sludge quantity, long sludge age, high sludge settling speed, efficient sludge selective separation and the like are better realized in continuous flow and sequencing batch water treatment systems respectively, and the method has the advantages of improving the impact load resistance, toxic and harmful resistance, low temperature resistance and the like of the system.

The invention discloses a sewage treatment system capable of flexibly switching AOA and AOAO, and relates to the technical field of sewage treatment.The sewage treatment system comprises an AOA sewage treatment pool set, the AOA sewage treatment pool set comprises an anaerobic pool, an aerobic pool and an anoxic pool, and further comprises an anaerobic pool reaction promoting mechanism and an anti-impact secondary sedimentation pool mechanism, the anaerobic pool reaction promoting mechanism comprises a rotary drum, and the rotary drum is connected with the anaerobic pool reaction promoting mechanism; the sewage treatment system comprises an anaerobic tank, a plurality of supports are arranged at the top of the anaerobic tank at equal intervals, the middle of each support is rotatably connected with a vertical rotating drum through a bearing, the top of each rotating drum is connected with a rotating power assembly, and three mounting sleeves are arranged on the peripheral side of the bottom of each rotating drum in an annular array mode. The two sewage treatment modes of AOA and AOAO can be flexibly switched according to the sludge sedimentation condition in the secondary sedimentation tank, the sludge turning phenomenon in the secondary sedimentation tank can be avoided, meanwhile, the sewage treatment energy consumption is reduced, and the sewage treatment efficiency is improved.

The invention provides an intelligent monitoring device and method for starting and optimizing operation of aerobic granular sludge. The device is mainly composed of a data acquisition module, a data processing module, a data integration and visualization module and a power supply module. The cameras are erected above and on the side of the granular sludge reactor and are used for respectively acquiring surface images of the granular sludge reactor and mud-water interface images in a precipitation stage. The collected images are transmitted to the industrial personal computer in real time for data processing, the constructed deep learning model is called to predict the particle size range, and two settling performance parameters, namely the maximum settling rate Vmax and the time t for reaching compression precipitation in the settling process are automatically extracted according to the generated sludge settling curve. If the identified image features or the settlement performance parameters reach a set threshold value, an alarm is triggered. The device can realize real-time monitoring and abnormity alarm of aerobic granular sludge characters, replaces daily inspection of personnel, and assists operation and maintenance personnel in traceability decision making through data visualization.

The utility model relates to an aeration tank with a desilting function, which comprises a water tank body, when sewage is subjected to aeration treatment, the sewage is discharged into the water tank body from a pipeline, then activated sludge for treatment is added into the water tank body, then air for aeration is pumped into an air supply pipe by an air compressor, and then the air is guided into an aeration disc through the air supply pipe; finally, gas is discharged into the pool body through the aeration disc for aeration, a first motor is started to drive a rotating rod to rotate during aeration, the rotating rod drives a surface cleaning plate to stir the interior of the pool body, one side of the cleaning plate is attached to the inner wall of the pool body, and sludge at the bottom of the inner wall of the pool body is scraped out; a drain valve is opened, the sludge deposited at the bottom of the pool body is discharged into a collecting hopper and a blow-off pipe, a second motor is started to drive a spiral conveying paddle to rotate, and the sludge in the blow-off pipe is discharged from a discharge valve.

The present invention relates to an AAAOF sewage treatment system and process, and belongs to the field of water, wastewater, sewage or sludge treatment. The sewage treatment system includes a biochemical tank, a secondary sedimentation tank and a sludge concentration tank; the biochemical tank is composed of a pre-anoxic tank, an anaerobic tank, an anoxic tank, an aerobic tank, an aerobic tank and an anaerobic tank connected in sequence; the pre-anoxic tank, the anaerobic tank, the aerobic tank and the anaerobic tank are all connected to the water inlet; the effluent of the biochemical tank is connected to the secondary sedimentation tank, and after the sludge is precipitated in the secondary sedimentation tank, a part of the sludge flows back to the pre-anoxic tank, and the other part of the sludge enters the sludge concentration tank, and the supernatant obtained by the treatment of the sludge concentration tank flows back to the anoxic tank. The sewage treatment system can further improve the efficiency of biological nitrogen removal and phosphorus removal on dry days, and has the sewage treatment capacity of overload treatment of more than 2 times the dry day design flow on rainy days, thereby greatly reducing the overflow pollution of the urban drainage system.

The invention provides a regulation and control method for rapid screening and enrichment of aerobic granular sludge and a continuous flow reaction system, and relates to the field of sewage treatment. The method is applied to a continuous flow reaction system of the aerobic granular sludge, the continuous flow reaction system of the aerobic granular sludge comprises a sludge scraping device, a sludge settling zone is divided according to preset conditions, and the initial position of the sludge scraping device in the sludge settling zone is determined according to the preset conditions; the mud scraping device is installed at the initial position; regulating and controlling the primary sludge reflux quantity and the secondary sludge reflux quantity according to a preset first sludge concentration range and a preset second sludge concentration range; and when the sludge reflux quantity is changed along with the change of inlet water quality, inlet water quantity or sludge settling performance, and the sludge liquid level of the first-stage sludge reflux sludge bucket or the sludge liquid level of the second-stage sludge reflux sludge bucket exceeds a preset range, the sludge scraping device is adjusted according to the sludge scraping action of the sludge scraping device. The problems that in aerobic granular sludge culture, regulation and control of sedimentation selection pressure are complex, and the granulation process is slow are solved.

The utility model discloses a layered clarification fluidized bed which comprises a vertical closed tank body, an inner cylinder fixedly connected in the tank body, a water outlet pipe fixedly connected to the top of the tank body in a penetrating manner, and a water inlet pipe fixedly connected to the part, close to the bottom, of the tank body in a penetrating manner, the bottom of the inner cylinder is closed, the water inlet pipe is communicated with the bottom of the inner cylinder, the top of the inner cylinder is open, the top end of the inner cylinder is fixedly connected with a reducing expansion pipe, and the large-diameter end of the expansion pipe is upward; the middle cylinder is arranged on the outer side of the inner cylinder and communicated with the middle of the inner cylinder, and sludge flows back to the middle of the inner cylinder; a cavity gap is formed among the tank body, the middle cylinder and the inner cylinder and serves as a sludge settling channel, sludge falls into a sludge collecting area at the bottom of the tank body, and the sludge collecting area is communicated with the outside of the tank body to discharge sludge. A new density layering, clarifying and separating mechanism is provided and applied in a coagulation and clarification treatment technology, the clarification and separation level is improved by utilizing the blocking characteristic of layering fluid, the effluent quality is improved, a new sludge backflow path is applied, the coagulation quality is improved, and formation of density layering fluid is promoted.

The invention relates to a magnetic enhanced sewage treatment system and a treatment process. The magnetic enhanced sewage treatment system comprises a biochemical tank, a reoxygenation tank, a secondary sedimentation tank, a sludge hydrolysis / activation tank and a magnetic powder feeding device which are connected in sequence. The biochemical tank comprises a pre-anoxic tank, an anaerobic tank, an anoxic tank, an aerobic tank and a facultative tank which are connected in sequence, a nitrification liquid part of the aerobic tank flows back to the anoxic tank, and the facultative tank is connected with the reoxygenation tank. The sludge hydrolysis / activation tank hydrolyzes sludge on sunny days and activates the sludge on rainy days, and the treated sludge flows back to the facultative tank. The magnetic powder adding device is used for adding magnetic powder into the facultative tank in rainy days. Part of sludge obtained at the bottom of the secondary sedimentation tank flows back to the pre-anoxic tank, part of the sludge flows back to the sludge hydrolysis / activation tank, and the other part of the sludge is dehydrated. According to the invention, excessive anaerobic denitrification reaction of sludge in the secondary sedimentation tank is effectively inhibited through the reoxygenation tank, the sludge sedimentation speed of the secondary sedimentation tank is increased by adding magnetic powder into the facultative tank, and the water treatment amount in rainy seasons is increased. According to the invention, dynamic optimization of carbon source utilization efficiency and biological nitrogen and phosphorus removal capability is realized through the sludge hydrolysis / activation pool, and stable operation under different working conditions of sunny days and rainy days is cooperatively guaranteed.

The invention discloses a system and a method for highly automatically detecting sludge sedimentation layering based on color difference, and particularly relates to the field of sewage treatment. Comprising an automatic test box body module, a visual acquisition module, a color analysis processing module, a data management transmission module and a field data analysis module, the automatic test box body module is used for completing filling, discharging and cleaning of a sludge sample, stabilizing a detection environment and supporting a standardized sedimentation test; the visual acquisition module is used for regularly shooting sludge sedimentation images, embedding time, places and biochemical pool serial number information, and retaining traceable visual detection data; and the color analysis processing module is used for identifying digital characteristics of color mutation characteristics in the image and accurately positioning the height of the sludge layering interface. The method has the advantages of being high in interface positioning precision, high in anti-interference performance, high in data visualization and high in expansibility.

The utility model relates to the technical field of sewage treatment, and discloses a process device for improving sewage treatment capacity, which comprises a sewage aeration tank, a temperature-regulating aeration mechanism, a dust filtering mechanism, a transverse moving mechanism and a sludge cleaning mechanism, and the temperature-regulating aeration mechanism extending into the sewage aeration tank is mounted on one side of the sewage aeration tank; a dust filtering mechanism is connected to the temperature adjusting aeration mechanism, a transverse moving mechanism is mounted at the top of the sewage aeration tank, and a sludge cleaning mechanism extending to the bottom end in the sewage aeration tank is mounted on the transverse moving mechanism. According to the utility model, sewage aeration treatment is convenient, and the temperature of the sewage can be conveniently adjusted according to weather temperature, so that bacteria keep high activity, and the decomposition speed of the bacteria on organic matters is increased; sludge settled in the sewage is convenient to clean.

The invention discloses a ship bilge oily water and ship waste gas denitrification and desulfurization waste liquid integrated removal device which comprises a tank body, and the tank body comprises a solid-liquid-gas separation area and a reaction area; the solid-liquid-gas separation area comprises a gas collection chamber and a sludge settling chamber, an exhaust valve I is arranged on the gas collection chamber, and a water outlet is formed in the tank body; the reaction area is of an inner, middle and outer sleeve type structure and sequentially comprises an external oil removal and desulfurization suspended sludge reaction area, a biological membrane reaction area and an internal suspended sludge reaction area from outside to inside; an overflow weir is arranged at the upper part of the external deoiling and desulfurizing suspended sludge reaction area and is communicated with the biological membrane reaction area; a baffle is fixedly arranged on the periphery of the upper end of the external deoiling and desulfurizing suspended sludge reaction area; the lower end of the internal suspended sludge reaction zone is communicated with the lower end of the biological membrane reaction zone, and the top end of the internal suspended sludge reaction zone is communicated with the solid-liquid-gas separation zone. According to the invention, comprehensive treatment of ship exhaust gas desulfurization wastewater, ship exhaust gas denitration wastewater and ship bilge oil wastewater is realized, and the method has high environmental and economic benefits.

The invention discloses a method for synchronously removing heavy metals and pollutants in aquaculture wastewater by utilizing copper stress to drive granulation of bacteria-algae granular sludge. The method specifically comprises the following steps: culturing and domesticating bacteria-algae granular sludge by adopting a sequencing batch reactor, and efficiently removing the high-concentration heavy metal Cu in the aquaculture tail water through long-term operation of the reactor under the illumination condition of simulated sunlight and low aeration intensity, and the average removal rate reaches 75% or above; meanwhile, organic matters and nutrient substances in the wastewater are effectively removed, and granulation of the bacteria-algae granular sludge is promoted. According to the method, the bacteria-algae granular sludge is used for treating the copper-containing low-carbon aquaculture wastewater for the first time, in the operation stage, the reactor performance is stable, the dirt removal capacity is not obviously influenced, under the exposure of Cu, the granulation process is accelerated, the sludge settling performance is far superior to that of a control group, and the method is a method for effectively removing heavy metal and pollutants in the aquaculture wastewater and has good application prospects. Good application prospects are realized.

The utility model discloses a sludge residue cleaning device for a sewage treatment sedimentation tank, and relates to the technical field of sludge residue cleaning devices for sewage treatment sedimentation tanks. The device comprises a sedimentation tank, the inner side wall of the sedimentation tank is fixedly connected with a lifting assembly, the side surface of the lifting assembly is fixedly connected with a sludge tank, and the top surface of the sludge tank is fixedly connected with a cleaning assembly. Through the arrangement of the cleaning assembly, after the limiting rod on the top surface of the sludge tank is pulled out, the side plate is detached, then the servo motor drives the lead screw fixed to the output end to rotate, the moving block in threaded connection with the surface of the lead screw drives the scraper fixed to the bottom surface of the moving block to move, and meanwhile the scraper is matched with the sludge tank; sludge settled in the sludge tank is scraped, and the sludge is pushed to be discharged from a mounting opening in the side surface of the sludge tank, so that the effects of conveniently and effectively removing the sludge in the sludge tank and avoiding the existence of dead angles to influence the sludge cleaning effect are achieved.

The invention relates to the technical field of sewage treatment, and discloses equipment for automatically detecting SV of sludge settlement, which comprises a reading machine and a mounting support plate on one side of the reading machine, a measuring cylinder is arranged on one side, close to the reading machine, of the mounting support plate, and a mounting seat is fixedly connected to one side, close to the mounting support plate, of the measuring cylinder. A first mounting frame is mounted on the side, close to the reading machine, of the mounting supporting plate, a sliding rail mechanism is fixedly connected to the side, close to the mounting supporting plate, of the first mounting frame, a wire groove guide chain mechanism is mounted on the side, away from the measuring cylinder, of the sliding rail mechanism, and a sliding table guide rail for flushing and an SV detection sliding table guide rail are arranged on the side, close to the measuring cylinder, of the sliding rail mechanism. According to the device, after sampling, the device can automatically detect SV30, data are obtained by driving a mechanical structure to move through signals of an optical sensor, the SV30 value is obtained through integration and analysis, the measurement precision can reach 1 ml, a non-contact measurement method is adopted in the mode, and pollution to measurement equipment can be reduced.

The invention discloses an activated sludge fluorescence online detection device based on a flow cell, and relates to the field of activated sludge biomass detection.The activated sludge fluorescence online detection device comprises a fluorescence spectrophotometer and a fluorescence spectrophotometer sample table arranged on the fluorescence spectrophotometer, and the fluorescence spectrophotometer is connected with a processor through a cable; the fluorescence spectrophotometer sample table is connected with a sample cup through a guide pipe, activated sludge is arranged in the sample cup, and a peristaltic pump is arranged on the guide pipe; the activated sludge continuously flows through the fluorescence spectrophotometer sample table through the guide pipe for three-dimensional fluorescence detection through the peristaltic pump, sludge sedimentation in a traditional cuvette is avoided, measurement is simple and convenient, and on-line real-time monitoring of the activated sludge biomass can be achieved.

The invention discloses a device and a method for treating high-nitrogen low-carbon wastewater by coupling iron-based porous combined filler with biological enhancement. The device comprises a sewage tank, a biochemical reaction device and a sludge controllable screening type sedimentation tank which are communicated in sequence, wherein the biochemical reaction device is divided into a front anoxic zone, an aerobic zone, a micro-aerobic zone and a rear anoxic zone according to the water flow direction; iron-based porous combined fillers are placed in the front anoxic zone and the rear anoxic zone, and porous fillers are placed in the aerobic zone and the micro-aerobic zone; the sludge controllable screening type sedimentation tank is provided with a partition plate, the front end area of the partition plate is a first screening area which is communicated with the front anoxic area, and the rear end area of the partition plate is a second screening area which is communicated with a sludge discharge pipe and a water outlet pipe. According to the present invention, the carbon source requirement can be substantially saved in the treatment of high ammonia nitrogen and low carbon nitrogen ratio sewage, the excess sludge yield is reduced, the sludge sedimentation performance is improved, and the effluent quality is improved.

The invention discloses an iron powder-pyrite coupled algal-bacterial symbiosis sewage treatment device and method.The iron powder-pyrite coupled algal-bacterial symbiosis sewage treatment device comprises an algal-bacterial symbiosis reactor body, an iron powder-pyrite assembly, a water inlet pump, an aeration system and a PLC control system; an inclined plate settling zone, a sludge settling zone and a reactor water outlet are arranged at the top, conversion of organic matters and ammonia nitrogen is realized through photosynthetic oxygen production, effluent from the top of the algal-bacterial symbiotic reactor is pumped into an iron powder-pyrite assembly by an external circulating pump, nitrate is reduced into nitrogen through sulfur autotrophic denitrifying bacteria, and phosphorus is removed through iron flocculent precipitation. The invention has the following beneficial effects: the algal-bacterial symbiotic system can utilize light energy to carry out photosynthesis, does not need a large amount of aeration, and reduces aeration energy consumption; the iron powder is combined with a sulfur autotrophic denitrification system, so that the long-term operation performance of pyrite autotrophic denitrification can be effectively improved, nitrogen and phosphorus removal is enhanced, and generation of sulfate radicals is reduced.

The utility model discloses an ultrasonic oily sludge treatment device and belongs to sludge treatment devices. Comprising a box body, a stirring device, an ultrasonic vibration plate, a heating assembly, a sludge settling tank, an inclined plate degreaser, an oil skimmer, a thermometer, a liquid level meter and a control system. The box body is divided into a left part and a right part, the left part is provided with a stirring device, an ultrasonic vibration plate and a heating assembly, the right part is provided with an inclined plate degreaser and an oil skimmer, and the bottom is provided with a sludge settling tank. The high-power ultrasonic vibration plate is used for treating the oily sludge, the effect of treating the oily sludge through ultrasonic mechanical vibration and acoustic cavitation is improved, the ultrasonic demulsification effect is improved, separation of petroleum in the sludge is enhanced, separated petroleum particles form large oil drops under the action of ultrasonic vibration, and the oil drops are separated from the oily sludge. The oil drops float upwards and overflow to the right side of the box body through the partition plate, oil is separated out through the inclined plate oil remover, and the sludge sinks and is collected and discharged through the sludge settling tank.

The invention belongs to the technical field of sewage biochemical treatment, and particularly relates to an internal circulation anaerobic reaction tower and an esterification wastewater treatment method.The internal circulation anaerobic reaction tower comprises a tower body, a rotary water distributor is arranged at the bottom in the tower body, two three-phase separators are arranged in the tower body in the height direction at intervals, and the two three-phase separators communicate with a gas-liquid separation cavity through ascending pipes; the gas-liquid separation chamber is located at the upper end of the tower body, a gas-liquid separation assembly is arranged in the gas-liquid separation chamber, the gas-liquid separation chamber is communicated with one end of the sinking pipe, the other end of the sinking pipe is located above the rotary water distributor, a gas-liquid mixture enters the gas-liquid separation chamber through the ascending pipe by virtue of the three-phase separator, and granular sludge settles and flows back under the action of gravity; after a gas-liquid mixture is stirred by the gas-liquid separation assembly, gas rises and is discharged out of the system, liquid flows back to the position above the rotary water distributor through the sinking pipe under the action of self gravity, stable internal circulation is formed, efficient backflow of sludge can be achieved without additional power, and the reaction efficiency and the treatment capacity are greatly improved.

The invention belongs to the technical field of sewage treatment, and discloses a method for strengthening anaerobic fermentation of sludge and synchronously producing medium-chain fatty acid and hydrogen. The method comprises the following steps: settling and concentrating sludge, mixing the sludge with alkaline biochar, adding potassium ferrate for reaction to obtain pretreated sludge, adjusting the pH value, mixing the pretreated sludge with an electron donor and inoculated sludge, and carrying out anaerobic fermentation to obtain fermentation liquor rich in medium-chain fatty acid and hydrogen. An alkaline biochar-potassium ferrate coupling system is utilized to crack extracellular polymeric substances and cell walls of the sludge, so that particle organic matters are driven to be dissolved, and the activity of methane bacteria is inhibited; fe2O3 derived from potassium ferrate and biochar form an iron-carbon complex in situ, and a composite technology with triple functions of pretreatment, electronic regulation and methane inhibition is formed by strengthening electron transfer efficiency and enzyme activity and promoting an organic matter acidification process and a carbon chain extension reaction, so that synchronous recovery of medium-chain fatty acid and hydrogen is realized; the sludge treatment efficiency is improved.

The invention discloses a sludge state abnormity identification and detection method for sewage treatment, and relates to a biochemical sewage treatment method, which comprises the following steps of: shooting image data in a sludge settling process by using high-definition image acquisition equipment, and enhancing pretreatment operation by using a sludge settling image; a novel hybrid model is constructed, and the model combines an improved YOLOv11 model and a K-means clustering algorithm and is used for sludge state detection and anomaly recognition; and edge deployment and model output: deploying the optimized and trained hybrid model to edge computing equipment to realize real-time sludge state detection and output of an anomaly recognition result, and judging whether an anomaly exists or not according to the output of the real-time sludge state detection and anomaly recognition result. According to the method provided by the invention, the sludge state and abnormal condition detection speed and accuracy are improved, the model parameter quantity is reduced, and the overall detection efficiency is improved. The technology shows a wide application prospect in the fields of environmental monitoring, sewage treatment and the like.

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 application discloses a sewage treatment system in-situ expansion method and device for improving the solid flux separation of a secondary sedimentation tank and a sewage treatment system. The method comprises the following steps: inputting activated sludge in the secondary sedimentation tank into a first separation cavity of a first-stage separation unit, so that the activated sludge is separated through spiral motion in the first separation cavity; according to the operation parameters of the secondary sedimentation tank and the performance of the activated sludge in an aeration tank in a biochemical treatment unit, inputting the activated sludge discharged from one of a first overflow port and a first underflow port of the first-stage separation unit into a second separation cavity of a second-stage separation unit, so that the activated sludge is separated through spiral motion in the second separation cavity, and inputting the activated sludge discharged from one of a second overflow port and a second underflow port of the second-stage separation unit back to the biochemical treatment unit. The method can regulate the solid load and sludge settling performance of the secondary sedimentation tank, increase the solid flux separation of the secondary sedimentation tank, and realize in-situ efficiency improvement and expansion of the sewage treatment system.

The present invention provides a device and method for promoting the generation of granular sludge applicable to a continuous flow reactor. The device includes a left baffle and a right baffle with a spacing therebetween. Inside the left baffle, a left flow guide plate and a left folding plate are sequentially arranged from bottom to top. Inside the right baffle, a right flow guide plate and a right folding plate are sequentially arranged from bottom to top. There is a spacing between the left flow guide plate and the right flow guide plate, and the spacing is adjusted by an adjusting mechanism to control the sludge sedimentation performance. A flow rate adjusting baffle with an adjustable angle is inclinedly arranged on the right baffle, and the residence time of the mixed liquid is controlled by controlling the adjusting angle of the flow rate adjusting baffle. The present invention can be directly installed in an existing continuous flow reactor, is applicable to the transformation of flocculent sludge into granular sludge in the existing continuous flow reactor, and realizes the promotion of the generation and screening of granular sludge through the principle of folding plate precipitation, thereby realizing the transformation of flocculent sludge into granular sludge in the continuous flow reactor.

The present invention relates to a magnetically enhanced sewage treatment system and treatment process. The magnetically enhanced sewage treatment system includes a biochemical tank, a reoxygenation tank, a secondary sedimentation tank, a sludge hydrolysis / activation tank, and a magnetic powder dosing device, which are connected in sequence. The biochemical tank includes a pre-anoxic tank, an anaerobic tank, an anoxic tank, an aerobic tank, and a facultative aerobic tank, which are connected in sequence. The nitrified liquid in the aerobic tank is partially returned to the anoxic tank, and the facultative aerobic tank is connected to the reoxygenation tank. The sludge hydrolysis / activation tank hydrolyzes sludge on sunny days and activates sludge on rainy days. The treated sludge is returned to the facultative aerobic tank. The magnetic powder dosing device adds magnetic powder to the facultative aerobic tank on rainy days. Part of the sludge obtained at the bottom of the secondary sedimentation tank is returned to the pre-anoxic tank, part is returned to the sludge hydrolysis / activation tank, and the remaining part is dehydrated. The present invention effectively suppresses excessive anaerobic denitrification of sludge in the secondary sedimentation tank through the reoxygenation tank, and increases the sludge settling rate in the secondary sedimentation tank by adding magnetic powder to the facultative aerobic tank, thereby increasing the amount of water treated in the rainy season. The present invention also achieves dynamic optimization of carbon source utilization efficiency and biological denitrification and phosphorus removal capacity through the sludge hydrolysis / activation tank, and synergistically ensures stable operation under different working conditions on sunny and rainy days.

The sludge settling separation equipment comprises a tank body, the tank body is internally composed of a gas collecting area, a settling area and a sludge storage area, the gas collecting area is provided with a gas outlet, the side wall of the settling area is provided with a sludge feeding pipe and a water outlet, the sludge storage area is in an inverted cone shape, and the bottom of the sludge storage area is provided with a sludge discharging pipe; the rotational flow inner part is arranged in the settling area, the rotational flow inner part is a cylinder body with the pipe diameter reduced from top to bottom, an opening in the bottom of the rotational flow inner part is a mud outlet, the top of the rotational flow inner part is closed, a clear liquid outlet is formed in the rotational flow inner part, and a feeding hole is formed in the side wall of the rotational flow inner part and is communicated with the sludge feeding pipe; and the baffle inner piece consists of a cylinder and a plurality of groups of baffle plates on the side wall of the cylinder. Compared with the prior art, the sludge settling separation equipment provided by the utility model can effectively improve the flowing and distribution characteristics of sludge and shorten the sludge settling separation time.

The utility model discloses an oxidation ditch for sewage treatment, which relates to the field of sewage treatment and comprises an oxidation pond, a water pumping pipe and a water inlet pipe are respectively arranged on two sides of one end of the oxidation pond, mounting sleeves are fixed on two sides of one end of the oxidation pond and in the middle of one side of the oxidation pond, and the water pumping pipe and the water inlet pipe are connected with the mounting sleeves; a filter part is arranged in one side of one end of the oxidation pond, and a biological treatment assembly is arranged at the other end of the oxidation pond and is used for treating sewage in the oxidation pond; a sludge pumping assembly is arranged on one side of the filtering part, is arranged on one side of the oxidation pond and is used for pumping and treating sludge settled in the oxidation pond. According to the sewage treatment device, the filtering piece is arranged in the oxidation pond, and the coarse filtering plate on the filtering piece plays a role in preliminarily filtering sewage, so that large foreign matters in the sewage can be filtered out, and workers can intensively fish out the large foreign matters conveniently.