118 results about "Sludge settling" patented technology

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 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 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 a sludge reflux tank capable of prolonging sludge settling time, which comprises a sludge reflux tank, one end of the sludge reflux tank is communicated with a sewage treatment tank, and the other end of the sludge reflux tank is communicated with a sludge settling tank through a reflux inlet; symmetrical guide rails are arranged on the two sides above the backflow port, connecting rods are slidably connected to the guide rails through guide blocks, baffles are arranged at the bottoms of the connecting rods and used for shielding the backflow port, and the height of the baffles is smaller than that of the backflow port. The reflux inlet is blocked by the baffle plate, and the height of the baffle plate is smaller than that of the reflux inlet, so that the lower-layer sludge is settled in the sludge reflux tank, and the top-layer slightly clear sewage overflows from the baffle plate and flows back to the sludge settling pond to be settled again; compared with an existing direct backflow mode, the mode has the advantages that the sludge backflow grooves can play a role in settling sludge, and a plurality of sludge backflow grooves are connected in parallel to form a large sludge settling pond, so that the sludge settling efficiency is greatly improved.

The application discloses an electrolytic catalytic biological denitrification reactor and relates to the technical field of sewage treatment. The electrolytic catalytic biological denitrification reactor comprises a reactor body, an external power supply connected to the reactor body, an anaerobic reaction chamber and an aerobic reaction chamber separated by a first partition wall in the inner cavity of the reactor body, and a first drainage hole formed in the first partition wall. A water inlet is formed in the outer side wall of the anaerobic reaction chamber. A unit cathode and a water flow propeller are fixed in the anaerobic reaction chamber. A water outlet is formed in the outer side wall of the aerobic reaction chamber. A unit anode and a water flow propeller are fixed in the aerobic reaction chamber. The unit anode and the unit cathode are connected in parallel through wires, and the wires are connected to the external power supply. The electrolytic catalytic biological denitrification reactor can effectively improve the biological denitrification efficiency, reduce the pollution to the environment, has strong adaptability to water quality changes, has good sludge settling performance, is easy to maintain, manage and operate, has high denitrification efficiency, and has small land occupation.

The utility model relates to the technical field of pipeline dredging equipment, and particularly discloses a device for accelerating the flowing of a medium in a pipeline, which comprises a mounting pipe, a rotating shaft is rotatably arranged in the mounting pipe, two ends of the rotating shaft extend out of the mounting pipe, and a plurality of driving blades are arranged around the part of the rotating shaft in the mounting pipe; a driving piece is arranged outside the mounting pipe and is a motor; the driving part is in transmission connection with one end of the rotating shaft, and when sewage flows from left to right in the mounting pipe, the driving part drives the rotating shaft to rotate anticlockwise; when sewage flows from right to left in the mounting pipe, the rotating shaft is driven by the driving piece to rotate clockwise. The rotating shaft is arranged in the radial direction of the mounting pipe and horizontally arranged in the mounting pipe. A plurality of water injection pipes are arranged on the mounting pipe in a communicating manner, and electromagnetic valves are arranged on the water injection pipes; the problems of blockage, unsmooth circulation and the like of a sludge conveying pipeline caused by sludge sedimentation and drying frequently occur in an existing sludge pipeline are solved.

According to the sludge settling ratio detector provided by the utility model, the height of the sludge level is monitored and shot in real time through the camera, and the shot height data of the sludge level is uploaded to the PLC processor for analysis and storage, so that the high precision of detection and the traceability of the data are ensured. Through the design of the top water inlet pipe and the bottom water inlet and outlet, a plurality of valves, a vacuum generation device and high-pressure air are matched, and the complete operation process of automatic water inlet, sedimentation, flushing and drainage is achieved. Particularly, pulse air washing is realized through high-pressure air, and deep cleaning of the measuring tool is realized through combination of tap water flushing, so that the cleaning efficiency of equipment is remarkably improved, and the influence of accumulation of residues on the measuring tool on subsequent detection is avoided. Meanwhile, the detector can flexibly adjust detection parameters according to actual requirements, meets the requirements of high-frequency and long-time continuous detection, greatly improves the automation level of sludge sedimentation, and reduces the manual operation cost.

This application discloses a system for enhancing the stable operation of a secondary sedimentation tank, belonging to the field of wastewater treatment technology. The system includes a tank body, an effluent trough fixedly installed at the upper inner side of the tank body, an overflow weir fixedly installed in the tank body and fixedly connected to the inner side of the effluent trough, a baffle fixedly installed in the tank body and fixedly connected to the inner side of the overflow weir, an operating platform fixedly installed on the tank body, a central column rotatably connected to the center of the tank body and located below the operating platform, and a sludge-removing structure installed on the central column for removing sludge from the bottom of the tank body. This system for enhancing the stable operation of a secondary sedimentation tank, by incorporating a dosing structure, allows for the simultaneous addition of flocculants to the tank body during sludge removal, improving sludge settling efficiency, helping to reduce the suspended solids concentration in the secondary sedimentation tank, and enhancing the stability and operational efficiency of the secondary sedimentation tank.

This invention relates to an advanced oxidation-biological co-treatment system and method for mineral processing wastewater. The advanced oxidation-biological co-treatment method for mineral processing wastewater of this invention includes the following steps: S1: Introducing polymetallic mineral processing wastewater into a pretreatment tank and adjusting the pH value for initial sedimentation treatment; S2: Introducing the supernatant into a coagulation sedimentation tank and adding a coagulant for secondary sedimentation treatment; S3: Introducing the supernatant into an ozone catalytic oxidation tower, adding a catalyst, and performing oxidation treatment to remove toxic and recalcitrant substances, and then removing residual ozone; S4: Introducing the wastewater into a biochemical reactor for biological treatment, followed by sludge settling, and discharging the supernatant after it meets the standards. The advanced oxidation-biological co-treatment method for mineral processing wastewater of this invention selectively catalytically oxidizes the wastewater before biological treatment, thereby improving the biodegradability of the wastewater.

The utility model discloses a sludge settlement detection device, which relates to the technical field of sludge settlement detection, and comprises a sampling structure and a cleaning structure, the sampling structure comprises an equipment box, a photoelectric sensor sending end and a photoelectric sensor receiving end which are respectively and fixedly arranged on two inner side walls of the equipment box, and a sampling barrel fixedly arranged on the inner bottom wall of the equipment box, the sewage discharging pipe is fixedly installed at the lower end of the sampling barrel, the sampling assembly is arranged on the surface of the equipment box, and the cleaning structure comprises a cleaning assembly arranged above the sampling barrel and a driving assembly arranged on the upper surface of the equipment box and used for driving the cleaning assembly to move. By arranging the cleaning structure, compared with the prior art, the device can inject clear water into the sampling barrel by matching the stirring component with the water spraying component, and stirs the clear water to generate water flow, so that the interior of the sampling barrel can be cleaned by the water flow, and the defect that the sampling barrel and a piston ring are scratched when a cleaning block and the piston ring are used for cleaning is avoided.

The invention relates to a microbial denitrification wastewater treatment method based on impact aeration, and belongs to the technical field of environmental protection and water treatment. According to the wastewater treatment method, the height-diameter ratio gt is adopted; a cylindrical reactor with the ratio of 5: 1 is adopted, wastewater is subjected to intermittent impact aeration, complete denitrification is achieved, and the method comprises the following steps that 1, activated sludge, iron modified particle filler and biological membrane filler are filled; step 2, introducing wastewater to be treated; step 3, starting a reflux pump; step 4, opening an electromagnetic valve to introduce air into the reactor; 5, closing the electromagnetic valve; step 6, repeating the step 4 and the step 5, so that the wastewater is subjected to multiple times of impact-aeration stopping circulation; 7, closing the reflux pump, and settling the sludge; and step 8, discharging clear liquid from the effluent weir. According to the wastewater treatment system, the height-diameter ratio reactor is adopted, and the air compressor is combined with the surge tank, so that complete denitrification of wastewater under low energy consumption is realized, and the problem of large occupied area of reaction equipment is solved.

The application relates to a sludge sedimentation ratio detection method, system, device, computer equipment and medium. The method comprises the following steps: obtaining a brightness image of an image of sludge in a transparent container after sedimentation in an HSV color space; performing contrast enhancement on the brightness image to obtain an enhanced image; screening out brightness mutation pixel points on each longitudinal pixel line based on the brightness value of each pixel point on the longitudinal pixel line in the enhanced image; each longitudinal pixel line is perpendicular to the horizontal direction of the enhanced image, and the multiple longitudinal pixel lines divide the enhanced image into at least three parts; determining the sludge layer height based on the height information of the brightness mutation pixel points on all the longitudinal pixel lines; and determining the sludge sedimentation ratio based on the sludge layer height and the initial height of the sludge in the transparent container. The method can improve the accuracy of the sludge sedimentation ratio detection result.

The invention belongs to the technical field of sewage treatment, and particularly discloses a bacteria-algae complex, a preparation method thereof and a sewage treatment method. The method comprises the following steps: firstly, establishing a short-cut nitrification coupling anaerobic ammonia oxidation system to treat sewage, gradually reducing the ammonia nitrogen concentration of the sewage after stable operation, and enriching sludge in the treatment process; the method comprises the following steps of: firstly, adding microalgae (including Scenedesmus, Chlorella and / or Auxenochlorella) into a treatment system, inoculating the microalgae into sludge, continuously carrying out short-cut nitrification coupled anaerobic ammonia oxidation treatment, gradually reducing the settling time in the treatment process, and separating settled substances in the treatment process to obtain the bacteria-algae complex. According to the present invention, with the application of the bacteria-algae complex, the low ammonia nitrogen concentration sewage treatment can be achieved, the treatment aeration rate can be reduced, the dissolved oxygen distribution can be improved, and the sludge settleability can be improved.

The invention relates to an aeration tank sludge sedimentation ratio prediction method and device based on autoregression decoding. The method comprises the following steps: arranging a sludge sedimentation observation container communicated with an aeration tank; introducing the mixed liquid of the aeration tank into an observation container, and capturing an image frame sequence of the mixed liquid in the observation container from a standing starting stage to a free settling stage; cleaning an observation container and discharging waste liquid, inputting an acquired image frame sequence into a sludge sedimentation ratio prediction model based on ResNet and autoregressive Transformer at the same time to obtain a predicted 30-minute sedimentation dynamic curve, and introducing a causal mask multi-head attention mechanism during prediction; and the prediction process is repeated after the aeration tank mixed liquid is introduced again. According to the method, the 30-minute SV value can be accurately predicted by capturing the short-time dynamic rule at the initial stage of sludge sedimentation, so that the response speed and accuracy of SV value monitoring are improved, and a support is provided for rapid and accurate regulation and control of a sewage treatment process.

The invention relates to the technical field of wastewater purification, and provides a tandem type wastewater purification treatment reaction device which comprises a sludge settling tank for settling sludge, the bottom side of the sludge settling tank is fixedly connected with a sludge discharge barrel, two communicating cores are vertically arranged in the sludge discharge barrel in a sliding mode, and the two communicating cores are communicated with the sludge discharge barrel. The two communicating cores are used for communicating the sludge settling tank and the sludge discharging barrel to guide settled sludge into the sludge discharging barrel, the sludge discharging barrel creates a negative pressure environment in the sludge discharging barrel through a negative pressure assembly to enhance the flowability of the sludge, and one side of the negative pressure assembly is connected with the two communicating cores through a connecting frame. Multifunctional linkage cooperation of negative-pressure sludge discharge, aeration area expansion, automatic increase of the air supply amount and inflow water interception is achieved, the overall efficiency of the system is remarkably improved, the sludge fluidity is greatly enhanced, the sludge discharge speed is increased, the aeration coverage range is expanded, the dissolved oxygen concentration is increased in cooperation with the dosage air supply device, and the aeration efficiency is improved. The anaerobic fermentation and activity reduction of the sludge during the sludge discharge period are effectively prevented.

This application discloses a pulse aeration device for preventing sludge accumulation in the flocculation zone of a high-efficiency sedimentation tank, belonging to the field of wastewater treatment technology. It includes a high-efficiency sedimentation tank, with a mixing zone, a flocculation zone, and a sedimentation zone arranged sequentially from left to right inside the tank. This application utilizes the coordination of an aeration device, an air distribution pipe, a pulse control valve, and a perforated aeration pipe to periodically aerate the flocculation zone. The pulse control valve periodically opens and closes, generating pulsating bubbles from the aeration holes of the perforated aeration pipe. The rising bubbles drive the surrounding water flow, forming local turbulence, enhancing the mixing effect and slowing sludge settling. Furthermore, the intermittent release of the pulsed airflow avoids the damage to the flocs caused by continuous aeration. A drive unit drives a threaded rod to rotate, causing a moving plate to move along the movable groove, adjusting the position of the stirring blades. Driven by a stirring motor, the threaded rod drives the stirring blades to rotate, forming a complementary mixing mode with the pulse aeration, further improving the flocculation effect.

The invention discloses a continuous flow gas stripping type aerobic granular sludge reaction device and application thereof, and belongs to the technical field of sewage treatment. The device comprises a reactor body, and the interior of the reactor body is divided into an up-flow area, a down-flow area and a three-phase separation area by guide cylinders. Wherein an aeration device is arranged at the bottom of the upflow area and is used for providing gas stripping power and oxygen; the quiet environment of the down-flow area facilitates sedimentation and backflow of sludge; and the three-phase separation area is provided with an effluent overflow weir and a baffle plate and is used for realizing gas-liquid-solid three-phase separation. According to the invention, mud-water mixed liquid is driven to well circularly flow between the up-flow area and the down-flow area by utilizing the gas stripping effect, and efficient mud-water separation and automatic sludge backflow are realized in the three-phase separation area. The whole reaction device is low in energy consumption, and the structural integrity and activity of the aerobic granular sludge can be effectively maintained. Through stable and efficient operation of an aerobic granular sludge technology in a continuous flow mode, the reaction device is applicable to treatment of degradation-resistant sewage with low C / N ratio and the like.

The utility model discloses a secondary sedimentation tank which comprises a tank body, the central cylinder is mounted in the tank body and connected with a water inlet pipe, and sewage enters the central cylinder from the water inlet pipe; the effluent weir is positioned at the upper part of the tank body, and clear water is discharged from the effluent weir after sewage enters the tank body to be settled; the sludge outlet pipe is used for discharging sludge settled at the bottom of the tank body out of the tank body; wherein a reflecting plate is arranged below the central cylinder, and sewage from the central cylinder flows through the reflecting plate and then enters the tank body. Compared with the prior art, the secondary sedimentation tank has the advantages that the reflecting plate is arranged below the central cylinder, and sewage from the central cylinder flows through the reflecting plate and then enters the tank body, so that the flow direction of the sewage can be changed, and the sewage is prevented from directly impacting the bottom of the secondary sedimentation tank.

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 invention discloses a full-automatic sludge settling ratio intelligent monitoring method and system, and relates to the related field of sewage treatment monitoring, the method comprises the following steps: automatically collecting a sludge mixed liquid sample, automatically starting timing, shooting a settling state image of the sludge mixed liquid sample at a key time node in the settling process, and calculating the settling ratio of the sludge; synchronously acquiring spectral data, environmental parameters and process configuration parameters; inputting the preprocessed settlement state image into a pre-trained image recognition model, obtaining related data from a model output result based on pixel distribution characteristics in the omnidirectional attention analysis image, and calculating a settlement ratio parameter; a historical sludge sedimentation ratio curve is drawn, the sedimentation characteristics are analyzed in combination with spectral data of a sludge mixed liquid sample, the change trend of the sedimentation ratio is predicted through a big data analysis method, early warning is made for abnormal states, and technological parameters in sewage treatment operation are optimized and adjusted. The problem that a traditional measurement method is low in efficiency is solved, and the full-automatic and intelligent level of sludge sedimentation ratio monitoring is improved.

The utility model relates to sewage treatment technical field, concretely relates to a kind of intelligent operation management system of sewage treatment plant, including control module;Secondary sedimentation tank bottom is provided main return mud pipe and auxiliary return mud pipe, main return mud pipe, auxiliary return mud pipe and secondary sedimentation tank connecting end are respectively provided first jet pipe, second jet pipe, main return mud pipe and auxiliary return mud pipe top are respectively provided sludge backflow mechanism and electromagnetic regulating mechanism, and sludge backflow mechanism and sludge backflow mechanism are electrically connected with control module, aeration tank is communicated aeration equipment by aeration pipe, first jet pipe is communicated aeration equipment by aeration auxiliary pipe, second jet pipe is communicated aeration equipment by aeration branch pipe;Secondary sedimentation tank is connected sampling device, and sampling device includes camera, camera shoots sludge sedimentation image in set time, and is transferred to control module;The utility model sets up sludge backflow double channel, selects appropriate backflow channel according to sludge amount in secondary sedimentation tank, avoid pipeline silt, effectively maintain sewage treatment system operation.

The application provides a non-ferrous metal mine flotation wastewater treatment equipment and method, and relates to the field of flotation wastewater treatment. The non-ferrous metal mine flotation wastewater treatment equipment and method comprises a wastewater treatment tank, the wastewater treatment tank is in a circular structure, a drain pipe is installed at the lower end of the side wall of the wastewater treatment tank, a sludge sedimentation layer in communication with the wastewater treatment tank is installed at the bottom end of the wastewater treatment tank, a flow disturbing assembly is arranged at the middle position of the wastewater treatment tank, and a sludge scraping assembly coaxial with the flow disturbing assembly is arranged at the middle position of the sludge sedimentation layer. The non-ferrous metal mine flotation wastewater treatment equipment and method can realize the effect of continuously treating wastewater by rotating the sewage in the wastewater treatment tank and performing a series of processes such as dosing, centrifugal layering, centrifugal sedimentation, coagulation and flocculation fishing and drainage, and continuously supplementing new sewage and continuously dosing during the coagulation and flocculation treatment and sludge sedimentation process.

The utility model discloses a drainage device for a bridge and culvert channel, and particularly relates to the technical field of bridge and culvert drainage. The water draining strainers are arranged on the two sides of the bridge and culvert; the sewer pipe is obliquely arranged at the bottom of the bridge and culvert and is communicated with the sewer grate; the bottom surface of the mud settling part is lower than the lowest point of the sewer pipe; and the spiral scraper blade is rotationally arranged in the sewer pipe and is used for pushing sediments to the mud settling part. According to the drainage device for the bridge and culvert channel, the inner wall of the sewer pipe is scraped through the spiral scraping plate, settled sludge is scraped, the scraped sludge is conveyed along the spiral face of the spiral scraping plate through the spiral scraping plate in the rotating state, sediments originally deposited on the inner wall of the sewer pipe are gathered towards a sludge settling part, and due to the fact that the sediments have viscosity, the sediments can be separated from the inner wall of the sewer pipe. Sludge is agglomerated at the sludge settling part, so that the probability of blocking the sewer pipe is reduced, and unified cleaning is facilitated.

The utility model relates to water treatment equipment, concretely is projection type SV off -line sludge subsidence observation device, including the box, the front side of box inside is equipped with the camera, is equipped with a plurality of fixed base that interval distribution along the left and right direction of box on rear side bottom plate, is used for placing the measuring cylinder, is set up with the fixed base corresponding placement hole on the top plate, is equipped with parallel light source on one side of fixed base away from the camera, is equipped with back projection panel close to the camera one side, the utility model discloses simplifies the operation, has improved the efficiency and effect of observation and record, eliminates the influence of the reflection point on the measuring cylinder and the interference image through the setting back projection panel, and the image contour is clearer, and the image analysis is convenient, to more accurate evaluation of the settlement condition of water sample.

The application discloses a denitrification biological reactor, which comprises a reactor body, a water inlet distribution system, a primary separator, a secondary separator, a circulating pump and a floating sludge pump. The bottom of the side wall of the reactor body is provided with a first water inlet, a sludge inlet and a circulating connection port; the middle of the side wall is provided with a motor port; the upper part of the side wall is provided with a first water outlet; the top is provided with a breathing port. The water inlet distribution system is installed at the bottom of the reactor body and adopts a perforated water distribution form with a hole diameter of 15-50 mm. The application adopts multiple measures to strengthen the degassing effect, increases the gas-liquid contact area, is beneficial to the escape of free gas from water to the gas phase, converts the gas into dissolved state by using the higher pressure of the lower part of the reactor, and reduces the gas amount of the mixed liquid entering the sedimentation module. The degassing is the prerequisite for sludge sedimentation, the strengthened degassing can improve the sludge sedimentation speed from the source and ensure the sludge-water separation effect.

The present application belongs to the technical field of sewage treatment, and discloses a method for simultaneously producing medium-chain fatty acids and hydrogen by enhancing sludge anaerobic fermentation. The sludge is concentrated and mixed with alkaline biochar, and then potassium ferrate is added for reaction to obtain pretreated sludge. After adjusting the pH, the sludge is mixed with an electron donor and inoculated sludge for anaerobic fermentation to obtain a fermentation liquor rich in medium-chain fatty acids and hydrogen. The alkaline biochar-potassium ferrate coupling system is used to break down the extracellular polymeric substance and cell wall of the sludge, drive the dissolution of particulate organic matter, and inhibit the activity of methanogens. Fe2O3 derived from potassium ferrate forms an iron-carbon composite with biochar in situ, and by enhancing the efficiency of electron transfer and enzyme activity, the acidification process of organic matter and the carbon chain extension reaction are promoted, forming a composite technology with three functions of "pretreatment-electron regulation-methane inhibition", realizing the simultaneous recovery of medium-chain fatty acids and hydrogen, and improving the sludge treatment efficiency.

The invention discloses copper-containing sewage treatment equipment which comprises a sedimentation tank, a mud pressing mechanism located in the sedimentation tank, a first cross beam and a second cross beam, the first cross beam and the second cross beam are arranged on the side wall of the sedimentation tank in a criss-cross mode, the mud pressing mechanism comprises a mud pressing cylinder and a mud pressing drainage assembly located in the mud pressing cylinder, and the mud pressing cylinder is arranged on the second cross beam. A sludge discharging assembly is arranged on the second cross beam, a sludge pressing groove is formed in the position, under the bottom of the sludge pressing barrel, of the center of the bottom of the sedimentation tank, the sludge pressing and draining assembly comprises a sludge pressing plate and a fixing cover which are movably arranged, and the sludge discharging assembly comprises a sludge shoveling device which is movably arranged. And a second through groove for the mud shoveling device to penetrate through is formed in the wall body of the upper half part of the mud pressing barrel. The sludge pressing mechanism is arranged, sludge is firstly settled and enriched in the settling pond, then extrusion dewatering and direct mud cake discharging integrated operation is carried out, the overall treatment efficiency is improved, and the equipment investment, the occupied area and the operation and maintenance cost are reduced.

The application belongs to the field of sewage treatment, and discloses a nano sludge settling accelerator, a preparation method and application. The nano sludge settling accelerator comprises the following components and component mass ratios: 0.01-0.1 parts of A component nano-scale ferroferric oxide particles, 5-15 parts of B component high polymer coagulant aid, 15-30 parts of C component inorganic salt solution, 0.1-0.2 parts of D component preservative stabilizer, and 55-80 parts of water. The sludge settling effect is good, the dosing amount is small, the nano sludge settling accelerator is non-toxic to microorganisms, and can be used for a long time, so that the long-term stable operation of a sewage plant can be realized.