57 results about "Settling basin" patented technology

The invention provides sludge and sewage resource utilization integrated equipment and a treatment method.The sludge and sewage resource utilization integrated equipment comprises a settling pond and a dewatering box, a sludge transfer device is arranged between the settling pond and the dewatering box, and the sludge transfer device comprises a negative pressure suction device located in the settling pond; the discharging device is located at the top of the dewatering box, the concentration conveying assembly is located between the negative pressure suction device and the discharging device and comprises a concentration conveying body, a first connector, a second connector and a third connector which are arranged at intervals are arranged on the side wall of the concentration conveying body, and the negative pressure suction device is communicated with the second connector. The discharging device is communicated with the third connector, and a first spiral conveying blade is arranged in the concentration conveying main body. The concentration conveying assembly and the dewatering box are designed in a compact and integrated mode, re-transferring in multiple structures is not needed, and the sludge and sewage treatment device is simple, efficient, good in sludge and sewage treatment effect and high in treatment efficiency.

The application provides a sedimentation tank flocculation sedimentation control method and device, electronic equipment and storage medium, including: obtaining raw water quality target parameters; based on the raw water quality target parameters, feature extraction and noise reduction processing are performed through an adaptive mode decomposition algorithm to obtain a feature vector; the feature vector is processed by using an extreme learning machine model optimized by an improved genetic algorithm to obtain a coagulant dosage prediction value; based on the coagulant dosage prediction value, coagulant is added to the raw water, and the operating parameters of the sedimentation tank are monitored; based on the operating parameters, the dry sludge amount in the sedimentation tank is determined through a dry sludge amount model; if it is determined that the sludge discharge condition is met based on the dry sludge amount and a pre-set sludge level threshold value, sludge is discharged; the effluent turbidity of the sedimentation tank is monitored in real time during the sludge discharge process, and the coagulant dosage is dynamically adjusted based on the effluent turbidity through the adaptive mode decomposition algorithm. In this way, the coagulant dosage accuracy and process synergy are improved, and the sedimentation tank is discharged on demand.

The application discloses an environment-friendly sludge pre-precipitation device for dredging, and belongs to the technical field of environment-friendly dredging, which comprises a sand settling basin, and further comprises: a water inlet pipe and a water outlet pipe; a supporting plate, a rotating shaft is rotatably arranged on the supporting plate through a bearing, a plurality of height-adjustable impellers are arranged on the rotating shaft; a fixing mechanism for limiting and fixing the impellers adjusted to different heights; in the scheme, the sludge sewage flows into the sand settling basin from the tangent direction of the inner wall of the sand settling basin, and a cyclone is formed along the inner wall; the driving mechanism drives the rotating shaft and the impeller to rotate, so that the sludge sewage flows spirally, the separation of organic matters and sand particles is promoted, the separation efficiency is accelerated, and the subsequent processing period is reduced; the fixing of the impeller by the fixing mechanism is released, then the impeller can be driven to move up and down to adjust the position, the position of the impeller can be adjusted according to the different sand settling treatment requirements of the sand settling basin, and the separation effect of the sand particles from the organic matters and water is better.

The utility model discloses a multistage coagulating sedimentation deep reaction device, which relates to the technical field of coagulating sedimentation reaction appliances and comprises a water tank, a coagulating basin component, a buffer basin component and a sedimentation basin component are arranged in the water tank, the coagulating basin component comprises impurity discharge funnels fixedly connected to the front end and the rear end of the upper part of one side of the water tank, a coagulating basin partition plate is fixedly connected between the other sides of the impurity removal funnels, and the lower end of the coagulating basin partition plate is fixedly connected with the inner wall of one side of the water tank; the movable plate is matched with the impurity discharging funnel, so that impurities can be discharged conveniently; through cooperation of the winding wheel set and the steel wire rope, the movable plate can be pulled up and put down conveniently to collect and discharge sundries; through cooperation of the settling plate and the upper and lower water diversion plates, clear water and sewage are conveniently separated, and sediments are prevented from being raised again and mixed into the clear water; the service life of the equipment is prolonged, the water purification quality is improved, the operation amount of workers is reduced, and the water purification efficiency is improved.

The utility model discloses an aggregate recovery device, and belongs to the technical field of aggregate recovery devices. The device is novel in design and ingenious, by arranging the conveying mechanism, the blanking mechanism, the sedimentation mechanism, the discharging mechanism, the discharging mechanism and the recycling mechanism, spray water containing aggregate enters the sedimentation tank through a connecting pipe to be deposited in a sedimentation area, and the left side wall of the sedimentation tank communicates with an overflow pipe used for recycling clear water; the lower portion of the sedimentation area is arranged to be in a hopper shape so that aggregate can be smoothly discharged, the aggregate deposited after the valve is opened enters the discharging pipe and falls into the material guide groove through the discharging pipe, the aggregate can smoothly enter the recycling pool conveniently by arranging the inclined plate in the material guide groove, and the aggregate falling into the material guide groove through the discharging pipe is recycled into the recycling pool in a unified mode. According to the aggregate recycling device, integrated aggregate recycling is achieved, the time cost and the labor cost are saved, the aggregate recycling efficiency is greatly improved, the practicability of the device is further improved, and the practicability of the device is greatly improved.

The utility model relates to the technical field of environmental protection, and particularly discloses a sedimentation tank structure for wastewater treatment, which comprises a supporting structure and a tank body, the tank body is defined by mounting plates and is provided with a mixing cavity and a settling cavity; a waste cavity is arranged at the bottom of the settling cavity; the settling cavity is communicated with the waste cavity; a settling partition plate is arranged in the settling cavity; the sedimentation partition plate is obliquely arranged; the mixing cavity is separated from the settling cavity through a settling partition plate; a settling tank is formed between every two settling partition plates; wastewater forms a settling path among the mixing cavity, the settling cavity and the settling tank; a water inlet is formed in a mounting plate of the mixing cavity; a discharge port is formed in a mounting plate of the waste cavity; openings are formed in the tops of the settling cavity and the mixing cavity and are sealed by isolation plates; a water outlet is formed in the settling cavity mounting plate. By controlling the mixing, settling and discharging processes, the settling tank structure solves the problems that the settling tank is low in treatment efficiency, precipitates are easy to accumulate and block, and the effluent quality is unstable.

The utility model discloses a multi-stage sedimentation tank and relates to the technical field of water treatment. The multi-stage sedimentation tank is used for settling and filtering chemical sewage and comprises a first sedimentation tank and a filtering piece; a first drainage hole and a second drainage hole are correspondingly formed in two opposite side walls of the first sedimentation tank; the filter part is arranged in the first sedimentation tank and comprises a first filter screen and a second filter screen; sewage flowing through the first drainage hole can penetrate through the first filter screen to enter the first sedimentation tank, and the sewage in the first sedimentation tank can overflow through the second filter screen along with increase and is discharged through the second drainage hole; according to the multi-stage sedimentation tank provided by the utility model, when sewage passes through the first sedimentation tank, the sewage is required to be filtered from entering the sedimentation tank and exiting the sedimentation tank, namely, the sewage is sequentially subjected to the treatment flows of filtering, sedimentation reaction and filtering, so that the sewage treatment effect can be greatly improved, and the probability of blocking a subsequent drainage pipeline is reduced.

The dam concrete face self-adaptive warm water circulation curing device comprises a water supply unit and further comprises a water retention plate, the water supply unit comprises a water distribution device and a sedimentation tank, the water distribution device is arranged at the top of a dam, the sedimentation tank is arranged on the lower side of a concrete face, and the water retention plate is laid on the concrete face on the surface of the dam; the water distribution device comprises a water distribution tank and a water distribution pipe, a water supplementing pipe is arranged on the water distribution tank, a first control valve is arranged on the water supplementing pipe, the water distribution pipe is connected to the lower side of the water distribution tank, and a plurality of branch pipes are connected to the water distribution pipe; a plurality of hole channels are formed in the water retention plate, the upper ends of the hole channels are connected with the branch pipes for water supply, and the sedimentation tank collects water flowing down from the concrete face and supplies water to the water distribution tank through a water pump and a water return pipe. Water can be uniformly permeated and distributed through the water retention plates, sunlight heat is absorbed through the water retention plates, maintenance water is heated, the heated water is recycled through the sedimentation tank for cyclic utilization, water resource waste is reduced, and traditional electric heating energy consumption is reduced.

The utility model relates to sewage treatment technical field, concretely is a kind of sedimentation tank with anti-blocking function, it includes pool body and central tube, the position of central tube near bottom is equipped with aeration unit, the aeration unit includes aeration assembly and aeration pipe, aeration pipe is arranged between aeration assembly and central tube, and the aeration gas stream released when aeration assembly periodic operation enters central tube to carry out water flow disturbance by aeration pipe;That is, the disturbance water flow formed by aeration gas stream in central tube solves the problem of central tube blockage, without manual cleaning, without setting complex filter device, in addition, the aeration unit of the scheme only as auxiliary flushing unit periodic operation, therefore, the influence to the sedimentation environment of sedimentation tank is less;Visible, the sedimentation tank of the structure of the scheme has the advantages such as high operating efficiency and long service life, and maintenance cost is also reduced and operation process is simplified, has wide application prospect and economic benefits.

This invention discloses a vertical subsurface flow system, relating to the technical field of constructed wetland systems. The vertical subsurface flow system includes a water storage system, a sedimentation system, a filtration tank, and a collection area. The sedimentation system includes a settling tank, a sedimentation chamber, an equipment room, and a pump room. The water storage system has an inlet well connected to the settling tank. The equipment room has a top-pump assembly for extracting water from the top of the settling tank. The settling tank and sedimentation tank are connected. The pump room has an outlet system for extracting water from the top of the sedimentation tank. The outlet system is connected to the filtration tank. The filtration tank includes several vertical subsurface flow filtration units connected sequentially from high to low. The vertical subsurface flow filtration units are connected to the collection area, which has an outlet. This application can reduce clogging of the vertical subsurface flow filtration units after prolonged use.

The present application provides a kind of sedimentation tank sludge quantity prediction system and method, it is related to sedimentation tank sludge control technical field, comprising: for each sedimentation period of sedimentation tank, at least one group of historical water inlet parameters and corresponding historical sludge-water interface height in non-sludge discharge period are obtained respectively, and total actual sludge production after sludge discharge period ends and corresponding total sludge-water interface height;According to each historical sludge-water interface height, total actual sludge production and total sludge-water interface height, the real-time actual sludge production corresponding to historical water inlet parameters is obtained by processing;Real-time water inlet parameters are obtained as input, and the sludge quantity prediction model corresponding to the real-time actual sludge production as output is trained;A group of real-time water inlet parameters of sedimentation tank in non-sludge discharge period is obtained, and real-time water inlet parameters are input into sludge quantity prediction model, to obtain the sludge quantity prediction result of sedimentation tank.The beneficial effect is that the real-time sludge production of sedimentation tank can be effectively predicted;Self-adaptive training and correction of sludge quantity prediction model can be realized.

A sedimentation tank for sewage treatment comprises a sedimentation tank body, a T-shaped water pipe and a material mixing assembly, the sedimentation tank body is communicated with the T-shaped water pipe, the material mixing assembly comprises a feeding assembly, a flow control assembly, a damping power assembly and a power transmission assembly, and the feeding assembly is arranged on the side face of a discharging part of the T-shaped water pipe and communicated with the discharging part of the T-shaped water pipe; the flow control assembly is arranged on the feeding assembly, the execution tail end of the flow control assembly is matched with the discharging end of the feeding assembly, the damping power assembly is matched with the tail end of the feeding portion of the T-shaped water pipe, one end of the power transmission assembly is matched with the power input end of the flow control assembly, and the other end of the power transmission assembly is matched with the power output end of the damping power assembly. The discharging amount of a flocculating agent can be controlled by arranging the flow control assembly, the flowing speed of sewage can be converted into power by arranging the damping power assembly, and the discharging amount of the flow control assembly is controlled by the flowing power of the sewage through the power transmission assembly, so that the mixing proportion of the sewage and the flocculating agent can be ensured by the mixing assembly; the sedimentation efficiency of the sedimentation tank is improved.

A system used for contaminant control has a container with a mixing well portion and a settling tank portion. Wastewater entering the system is conveyed from a water inlet into the mixing well portion, where sediment or contaminants can be removed from the wastewater. The wastewater is moved to a settling tank portion, where additional sediment or contaminants are removed by settling to the bottom of the tank. A weir positioned at a top surface of the settling tank portion removes clarified water from the system. The settled sediment or contaminants can be removed from a sludge piping system. A flocculant additive system and lamella separators can also be used to assist settling processes. Further, a recirculation system can be used to reintroduce settled contaminants into the mixing well portion to increase efficiency of the system.

This invention discloses a rod mill sand-making method, comprising the following steps: S1, setting the control priority of the control module; S2, system startup, with the ore particle size detection mechanism continuously monitoring the ore particle size value on the discharge mechanism; the slurry conveying mechanism operates according to the detection value of the liquid level detection mechanism, maintaining the liquid level in the slurry settling tank within the normal range H3; S3, when the detection value of the ore particle size detection mechanism is less than the lower limit of the qualified range H2, the control module causes the feeding mechanism to feed in stages at multiple levels with progressively decreasing feed rates G; when the detection value of the ore particle size detection mechanism is greater than the upper limit of the qualified range H2, the control module causes the feeding mechanism to feed in stages at multiple levels with progressively increasing feed rates G. A rod mill sand-making system is also disclosed. This rod mill sand-making method and system reduce water waste, improve the stability of the output sand particle size and production quality, and meet the dual requirements of improving production quality and saving water.

The two-way switching system and its operating method for a sewage treatment plant includes an inlet basin connected to a dry season treatment system and a wet season treatment system, respectively. The dry season treatment system includes a fine-coarse mixing grate connected in series to a settling basin, a membrane grate device, an AAO combined basin, an MER reaction basin, and a first UV disinfection tank. The wet season treatment system includes a self-cleaning grate connected in series to a flow control valve, a combined flow regulation reservoir, a magnetic sedimentation system, a fiber rotary disk filter, and a second UV disinfection tank. The inlet basin is equipped with a liquid level sensor, a sludge concentration sensor, and a flow rate sensor. A selector valve is installed in front of the self-cleaning grate, and the liquid level sensor, sludge concentration sensor, and flow rate sensor are connected to a control unit.

To provide a sludge scraping device comprising a guide mechanism which has a high reliability in operation and is less likely to malfunction.SOLUTION: A sludge scraping device comprises: a scraping frame having a plurality of scrapers which guide sludge to a sludge pit; a drive unit which reciprocates the scraping frame in a sedimentation pond; a guide device 40 guides the scraper along a floor surface of the sedimentation pond when the scraping moves forward, and guides the scraper at a higher position than that during forward movement when the scraper moves backward; and a hanging member 30 which so hangs the scraping frame as to be movable with respect to the guide device 40, and travels along the guide device. The hanging member 30 has: a plurality of rollers 31 which move in the guide device 40; a plurality of roller support members 32 which are respectively provided on left and right outsides in a width direction of the guide device 40, and rotatably support the roller 31; and an assembly member 33 which fits the roller support member 32 to the scraping frame.SELECTED DRAWING: Figure 3

This utility model belongs to the field of wastewater treatment, and in particular, it is a sedimentation tank with a buffer structure. Addressing the problem that existing sedimentation tanks suffer from sludge impacting the bottom structure, causing settled sludge to float a second time, and that sludge easily forms caking due to concentration gradient changes during sedimentation, affecting solid-liquid separation, the following solution is proposed: It includes a sedimentation tank and a stirring assembly. The sedimentation tank has a discharge pipe at the bottom and an opening at the top. A cross-shaped support plate is bolted to the top of the sedimentation tank. A conical cover is fixedly connected to the bottom of the cross-shaped support plate, and a flared pipe is fixedly connected to the bottom of the conical cover. A feed pipe with a 15° upward inclination is installed on the side wall of the flared pipe and sealed with a flange. In this utility model, through the synergistic effect of a multi-stage buffer structure and a low-speed anti-caking device, a breakthrough improvement in sedimentation tank performance is achieved. A dual buffer system consisting of a flared pipe and a conical block is adopted, and the anti-caking system uses a variable-speed stirring mechanism driven by a servo motor.

The utility model belongs to the technical field of sedimentation tank, concretely is a kind of sedimentation tank overflow port, including the well type overflow cylinder body of bottom end intercommunication drainage channel, and it includes: the well type overflow cylinder body top inlet is flared mouth shape and in the peripheral floating of inlet, annular floating plate connected with the annular floating plate that prevents surface water directly into inlet is equipped with.The annular floating plate is equipped with the cylindrical structure that extends below waterline, the gap between the cylindrical structure and well type overflow cylinder body forms the passage that sedimentation tank water flow enters inlet, the edge of inlet is broken line top edge, annular floating plate can adaptively slurry density change, always float in surface layer, effectively block the lightweight impurities with density less than quartz sand.Horn mouth design reduces the water inflow velocity to 0.1-0.3m / s, avoid disturbing already settled quartz sand layer.The structure is especially suitable for quartz sand washing process, can reduce the loss of useful quartz sand about 15%, improve raw material recovery rate.

The present application relates to the technical field of sand discharge of sand settling basin, and discloses a vortex type sand settling basin sand discharge port anti-clogging regulation and control device and method, which comprises a vortex type sand settling basin main body provided with a sand discharge port main body at the bottom, further comprising: a shell, the main body is fixed inside the straight cylinder section through a support rod, a main shaft is arranged in the center of the shell, driving blades and clogging clearing blades are arranged at the two ends of the main shaft respectively, a support is arranged on both sides of the shell, impact hammers are arranged on the bottom of the support through pressing plates, limit supports are arranged below the pressing plates, gears are arranged on one side of the limit supports, racks meshing with the gears are arranged on both sides of the shoulder, and a vibrating anvil is arranged at the bottom end of the shell. The automatic continuous clogging clearing is realized by using the vortex water flow, the threefold synergistic effect of automatic blocking and yielding, mechanical vibration and auxiliary water flow scouring can effectively prevent the mud cake and large particle impurities from being stuck, the dredging is complete and stable, and the device can automatically reset.

The utility model relates to a settling and filtering treatment device for dyeing wastewater. The settling and filtering treatment device sequentially comprises a pretreatment unit and a settling unit from left to right, the pretreatment unit sequentially comprises a coagulating basin and a flocculation basin from left to right; the sedimentation unit sequentially comprises a first sedimentation tank and a second sedimentation tank from left to right; and a filtering assembly is detachably mounted in the drainage pipe. According to the utility model, through the coagulation and flocculation treatment of the pretreatment unit in sequence and the secondary sedimentation of the sedimentation unit in sequence, impurities entering the drainage pipe can be greatly reduced, and the treatment effect of wastewater is improved.

The utility model discloses a sedimentation tank flotage cleaning device for water purification, which comprises a support plate, collection frames, a fixed rod and a holding piece, the support plate and the holding piece are respectively arranged at two ends of the fixed rod, a pulling piece is arranged on the fixed rod, the collection frames are symmetrically arranged at two sides of the center line of the support plate, and the collection frames are arranged on the two sides of the center line of the support plate. Strip-shaped grooves are formed in the two sides of the center line of the supporting plate, fixing blocks are fixedly installed on the collecting frames, the fixing blocks are arranged in strip-shaped holes in a sliding mode, and the pulling pieces are rotationally connected with the fixing blocks symmetrically arranged on the collecting frames on the two sides of the supporting plate respectively. Due to the arrangement of the holding piece and the fixing rod, a worker can conveniently control the salvage depth of the collecting frames, the collecting frames arranged on the two sides of the center line of the supporting plate can be sealed mutually, floating objects can be prevented from falling off in the salvage process, and the salvage efficiency and the salvage quality of the collecting frames on the floating objects are improved.

Wastewater settling pit comprising a settling tank, a wastewater inlet and a settled water outlet, which are fluidically connected to the settling tank, a wastewater deflector, and an opening arranged to allow access to the inlet and / or the outlet, wherein the inlet and the outlet are close to each other so as to both be accessible through the opening.

The application discloses an oxidation ditch flow state sedimentation method, which is applied to an oxidation ditch flow state and comprises a sedimentation unit and a pushing device, and at least two stages of solid-liquid separators are arranged at intervals in the sedimentation unit; the specific steps are as follows: the oxidation ditch flow state is pushed by using the self-flow velocity of the oxidation ditch flow state or by the pushing device, so that a certain circulation velocity of the oxidation ditch flow state is generated; the sludge liquid with a certain flow velocity is separated layer by layer through the solid-liquid separators in the sedimentation unit, a circulation is formed in the cavity region between adjacent solid-liquid separators, and the particle content of the sludge liquid to the next stage of solid-liquid separator is reduced; the supernatant is discharged through the effluent weir of the sedimentation unit, the organic matter sludge liquid is backflowed to the sedimentation tank through the solid-liquid separator, and solid-liquid separation is realized; the oxidation ditch flow state is originally proposed in the method, and a high-efficiency sedimentation method is provided for the oxidation ditch flow state; compared with the traditional fixed and static sedimentation, the surface load is at least 2 m 3 / ㎡h.

The present invention relates to a method and apparatus for purifying iron and manganese in industrial and natural water by oxidizing the contaminants with ozone and then filtering. The method includes treating the water with ozone by mixing the water with ozone in an eductor. The water and ozone are then mixed in a static mixer. The water is then sent to a settling basin for sludge settling. The water is sent from the settling basin to a filter that uses at least one disc filter having a filter precision of no less than 20 microns. The water is then subjected to tangential microfiltration using a cross-flow method. The result is effective non-chemical purification of the water while minimizing the cost of the purification process and equipment maintenance.

The invention relates to the technical field of constructed wetlands, in particular to a pipeline assembly type subsurface flow constructed wetland which is formed by serially assembling a sedimentation unit and a plurality of wetland treatment units which are arranged in sequence through a concrete prefabricated connecting seat, and in the sedimentation unit, a flow distribution pipe is arranged in a sedimentation tank in a manner of being vertical to the length direction of the constructed wetland; a plurality of flow distribution holes are arrayed in the flow distribution pipe in the length direction, one end of the flow distribution pipe is sealed by a blind plate, the other end of the flow distribution pipe is communicated with the main inlet pipe, sewage enters from the end side of the flow distribution pipe, and a sedimentation structure is arranged in the sedimentation tank. The settling unit is arranged on the upstream side of the constructed wetland, fine impurities in sewage entering the constructed wetland can be settled in advance, and settled and collected sewage is pumped and discharged regularly through the sewage pump, so that the burden of subsequent treatment steps of the constructed wetland is reduced, the sewage treatment efficiency of the constructed wetland is improved, and the sewage treatment cost is reduced. A partition plate and a baffle plate are arranged in the sedimentation tank for sedimentation partition, so that impurities can be subjected to partition sedimentation.

The invention discloses a sedimentation tank for tailing recovery treatment, and relates to the technical field of tailing treatment, and the technical key points are that the sedimentation tank comprises a sedimentation tank which is provided with a plurality of sedimentation zones, and the plurality of sedimentation zones are in a step shape; each settling zone is provided with a plurality of fixing plates, the plurality of fixing plates are distributed in the width direction of the settling tank at equal intervals, the plurality of fixing plates are arranged at one end close to the next settling zone, and the plurality of fixing plates are arranged in a step shape; the two fixed plates at the two ends in the width direction of the settling zone are closest to one end of the next settling zone; the two side faces of each fixing plate are each provided with an installation opening. The filter screen assembly is composed of a filter screen and a frame fixedly installed on the edge of the filter screen. The top end of each fixing plate is rotationally provided with a rotating rod, and the top end of each fixing plate is provided with a locking assembly. And the difficulty of discharging and collecting the tailings is low, and the blocking condition is not prone to occurring.

The invention discloses an advanced treatment process for diluted multi-source water, and relates to the technical field of water pollution control and treatment. The sedimentation tank is provided with a water inlet pipe, a sludge outlet pipe and an effluent weir, inclined plate filler is arranged at the upper part of the water inlet pipe in the sedimentation tank, the sludge outlet pipe of the sedimentation tank is connected with a screw pump inlet, and a screw pump outlet is connected with a sludge concentration mechanism. The device has the beneficial effects that the left filter and the right filter which are switched to work are arranged, so that settled sludge can be continuously filtered, the water content of the sludge is reduced, and the subsequent treatment pressure is relieved; the sludge discharge channel is opened or closed by using the pressure difference between the upper and lower parts of the filter screen, the filter screen is backwashed, and the trigger assembly is arranged, so that the working states of the left filter and the right filter are automatically switched, manual operation is not needed, and the operation reliability is high.

An erosion prevention and sedimentation control flow-regulation device and system is provided for all customary applications addressed by conventional filtration devices such as check-dams (ditch check, channel or culvert), inlets (curb and ground), slope (hillside), perimeter control and settling and other ponds. The flow-regulation device and system is comprised of two components: (1) a heavy, irregular-shaped, hard-wearing, non-filtering, high-porosity fill media encapsulated in a heavy-duty, high-tensile mesh (the ‘high-porosity particle mix component’), and (2) an optional sheet-like synthetic geotextile material with limited permeability (the ‘low-permeability choker component’). The high-porosity particle mix component allows much larger flows of water through the device and system. The low-permeability choker component constricts or ‘chokes’ the flow of water into the high-porosity particle mix component. The instant abstract is neither intended to define the invention disclosed in this specification nor intended to limit the scope of the invention in any way.

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

The utility model relates to city sewage treatment technical field, concretely disclose a kind of sedimentation tank devices of city sewage treatment, including sedimentation tank, the inside of the sedimentation tank is provided with primary flow stabilizing equipment and secondary flow stabilizing equipment;The primary flow stabilizing equipment includes the settling tank being set in the inside of sedimentation tank, the upper portion of the settling tank is provided with annular flow guide pipe, the outer wall of the annular flow guide pipe is connected with multiple shunt pipes that distribute evenly, the outer wall of the annular flow guide pipe is connected with water inlet pipe;Through annular flow guide pipe shunt and radial water distribution pipe network constitute primary flow stabilizing system, convert into multidirectional uniform water distribution with concentrated water inlet, completely eliminate turbulent flow and short flow caused by single-point impact;Adjustable sleeve pipe flow stabilizing mechanism realizes secondary dynamic regulation and control, pass through rotating screw rod drive universal ball mechanism, the coincidence degree of through hole and flow stabilizing hole is accurately adjusted, makes overflow velocity stable, above-mentioned, reach the purpose of improving sedimentation efficiency.