231results about How to "Avoid short flow" patented technology

An LED driver circuit is provided for protecting one (or more) LEDs connected in series from over-current damages which may result from a short circuit condition. The driver circuit includes a current control circuit for receiving an input signal from a power source and providing a current output for powering the LED. A voltage sensor detects a voltage across the LED. An LED current restriction circuit such as a switching element restricts a current flow into the LED. A short circuit response circuit controls the LED current restriction circuit dependent on a comparison between the voltage detected by the voltage sensor and a predetermined threshold value. When the detected voltage is less than or equal to the threshold value, the response circuit determines a short circuit, and a signal is sent to the current restriction circuit to restrict current flow into the one or more LEDs.

A device for mixing two paste like compounds, such as a dental molding compound using a catalyst for the acceleration of polymerization. The housing has a mixing area with at least two inlet openings for the compounds and an outlet opening for the mixed compound. The device also has a mixing element that is disposed in the mixing area and propelled around a longitudinal axis. The housing has a coupling section that is situated in front of the mixing area with two coupling openings for connecting with two dispensing openings of a device for dispensing the two paste like compounds. The first and second ducts connect to the couplings via the coupling openings extending through the coupling section into the inlet openings for the mixing area. The two ducts are formed so that the first duct requires a greater time of entry of the compound into the mixing area than the time required for the second compound flowing through the second duct.

A turbocharger system having a compressor housing containing a rotating compressor wheel with a plurality of main blades that define an impeller passageway from an inducer to an exducer. Each main blade has a leading edge characterized by an extension forming a non-planar, conical inducer leading edge, and a trailing edge characterized by a reverse-clip-extension forming a non-cylindrical, conical exducer trailing edge.

The invention relates to electric flocculation-air flotation integrated waste water treatment equipment which comprises a water distributing area, an electrolyzing area, an air flotation area, a settling area and a water outlet area, wherein the water distributing area adopts a large-resistance water distributing system; the electrolyzing area adopts an electrode fixing frame for fixing an electrode, the electrode adopts bipolar type connection, and a direct current power supply reverses the electrode at intervals to prevent passivation; after electrolyzing, slag-water separation of the wastewater is completed in the flotation area and the settling area; slag scraping equipment and a slag chute are arranged at the upper part of the flotation area; a sludge collecting board and a sludge discharge pipe are arranged at the lower part of the settling area; and the waste water after being separated by flotation and settling is discharged from the water outlet area. Compared with the original electric flocculation equipment, the invention has the advantages of simple structure, low investment, small floor space, simple operation and maintenance and the like, and the equipment is suitable for treatment of different waste water.

In a method and apparatus for making an article with a microstructure or nanostructure, an injection molding process or an injection-compression molding process is used to produce a substrate and to apply a microstructure or nanostructure upon a surface of the substrate. Subsequently, the substrate is inundated with a cross-linking, curing material.

An LED driver circuit is provided for protecting one (or more) LEDs connected in series from over-current damages which may result from a short circuit condition. The driver circuit includes a current control circuit for receiving an input signal from a power source and providing a current output for powering the LED. A voltage sensor detects a voltage across the LED. An LED current restriction circuit such as a switching element restricts a current flow into the LED. A short circuit response circuit controls the LED current restriction circuit dependent on a comparison between the voltage detected by the voltage sensor and a predetermined threshold value. When the detected voltage is less than or equal to the threshold value, the response circuit determines a short circuit, and a signal is sent to the current restriction circuit to restrict current flow into the one or more LEDs.

The invention discloses an integrated water treatment purifier which comprises a shell (1) with an inner chamber, wherein the upper part of the shell is connected with a water outlet pipe (2), the lower part of the shell is connected with a mud outlet pipe (4), and the inner chamber of the shell (1) is provided with a flocculation reaction device (5); the flocculation reaction device (5) comprises a water inlet pipe section (5a) and a reactor body (5b), wherein the inner chamber of the reactor body is provided with flocculated packing (5c), the lower part of the reactor body is provided with an upper tapered flow guide component (6), an inclined plate assembly (7) is formed on the outside of the periphery of the reactor body (5b), a lower chamber (1a) is formed in the inner chamber of the shell by the inclined plate assembly, the bottom of the lower chamber (1a) is a concentrated mud collection zone, a filter layer (8) is arranged above the inclined plate assembly (7), a middle chamber (1b) and an upper chamber (1c) are formed in the inner chamber of the shell by the filter layer (8), and the upper chamber (1c) is communicated with the water outlet pipe (2). The integrated water treatment purifier integrates flocculation, sedimentation, filtering and concentrated mud collection, and has the advantages of no mutual interference of functional zones, simple and compact structure and small floor area, which is favorable for enhancing the water quality of output water.

This invention relates to a wastewater treatment apparatus, especially UCT-broken line flow membrane bioreactor for reclaimed water reuse. The apparatus comprises: a float valve, a punched aeration tank, a liquid flow meter, a gas flow meter, a vacuum pressure gauge, a hollow fiber membrane module, a diving reflux pump, a single-stage self-priming pump, an electronic stirrer, an aeration pump, an ORP potential tester, am oxygen dissolution tester, a water storage tank, and an adjusting pool. The membrane bioreactor is divided into an anaerobic zone, an anoxic zone and an aerobic zone at a volume ratio of 1:1:4. Two partition boards are set in the aerobic zone. The ORP probe can monitor the redox potential of the anaerobic zone and the anoxic zone, and broken line flow mode of water flow in oxygen dissolution reactor in the aerobic zone. A dump pump is used to pump water into the water storage tank via the membrane module.

The invention discloses a net cage type biological carrier, an immobilized microbiological treatment sewage device and application of the immobilized microbiological treatment sewage device. The net cage type biological carrier comprises a net cage and biological stuffing filled in the net cage, wherein the net cage is in the shape of a rectangle without a top cover, and a hollow-out mesh holes are formed in the side surface and bottom surface of the net cage. The immobilized microbiological treatment sewage device comprises a sewage treatment tank, a perforated mud discharge tube, a perforated aeration tube, a plurality of lower supporting beams and a sealing net, wherein a plurality of the net cage type biological carriers are stacked in the sewage treatment tank and arranged above the lower supporting beams. The net cage type biological carrier disclosed by the invention is large in specific surface area, low in accumulation, caking and blockage possibility, good in gas-water permeability, and convenient to mount and maintain. The immobilized microbiological treatment sewage device is good in gas-water flow state, conductive to bringing mass transfer effect into play, large in biological load amount, good in treatment effect and suitable for high-concentration degradation-resistant sewage treatment and advanced sewage treatment.

The invention relates to a baffling type constructed wetland device for treatment of low-concentration area source pollution, which comprises a pool body (2), filler arranged in the pool body, emergent aquatic plants grown on the surface layer of the filler and a guide wall (6) dividing the pool body into a plurality of cells. The guide wall (6) is provided with a water through-hole. The invention can realize the hybrid exchange of the upper water layer and the lower water layer, thereby improving the water flow conditions of the traditional constructed wetland, increasing the twists and turns of the flow in the wetland bed, extending the sewage flow, increasing the contact time of the sewage and the substrate, preventing the 'short-circuiting' in the wetland bed, and enhancing the utilization efficiency of the wetland bed. Moreover, the invention adopts the blast furnace slag, lime stone, broken stone and other substrates with high degradation efficiency for nitrogen and phosphorus to substitute the gravel to fill the bed, and the substrate can be prepared according to different gradations of the filler, thereby improving the porosity of the bed, preventing the blockage of the wetland, and realizing high-efficiency removal of the nitrogen and phosphorus.

The invention relates to the technical field of waste gas purification, particularly a garbage transfer station malodorous gas treatment technique and device. The garbage transfer station malodorous gas treatment technique comprises a working mode and a disinfection mode, wherein the working mode adopts a low-temperature plasma cracking oxidation reactor and catalytic oxidation bed purification process; and the disinfection mode is implemented by the following steps: introducing air into the low-temperature plasma cracking oxidation reactor to generate ozone, hydroxy free radical and other active groups, and delivering to garbage, garbage leachate and other parts in need of disinfection treatment to perform disinfection. The garbage transfer station malodorous gas treatment device comprises a collecting system, a low-temperature plasma cracking oxidation reactor, a catalytic oxidation bed and a draught fan. The technique and device have high purification efficiency and favorable effect for malodorous peculiar smell, is slightly influenced by various environments and extrinsic conditions, and can effectively disinfect the parts in need of disinfection without influencing the biochemical properties of the garbage.

The invention discloses a turn-back flow high-efficiency rectangular double-layer settling pond. In the settling pond, the body of the pond is divided into an upper layer and a lower layer by a partition board which is arranged horizontally, wherein a high-efficiency lateral flow inclined plate is arranged in a lower layer settling area so as to strengthen the suspended matter trapping efficiency according to a shallow pond principle; sewage mixed solution enters an upper layer settling area from a water hole in one end of the partition board for further solid-liquid separation by tranquilflow settling, and the effluent is collected in and flows out from a water collection tank arranged at a water outlet end; and the settled sludge is scraped and absorbed by a chain-plate type mud scraper or mud scraper and absorber which can adapt to the unique structure of the settling pond, and at the same time, scum is scraped into a scum collection device. Compared with the prior part, the settling pond has the advantages of avoiding the phenomena such as short flow, obvious dead water area and sludge floating in a common settling pond, along with high settling efficiency, smaller floor area and lower operation cost.

The invention belongs to the technical field of sewage treatment in environmental engineering, and particularly relates to a method and a device for treating phosphorus wastewater by adopting a multi-electrode baffling electric flocculation process. The PH value of wastewater is regulated with alkaline liquor to 7.0-8.0; the regulated wastewater is pumped into an electric flocculation tank through a peristaltic pump, is subjected to electrolytic flocculation treatment through the baffling of a multi-electrode under the condition of aeration, and then is discharged through an overflow launder, the discharged water is collected and left to stand for 30 minutes, a liquid supernatant is discharged, a floc is recycled; a power supply of the electric flocculation tank is a direct current power supply, the current density is 1.27-5.08mA / cm<2>, and the electrolysis time is 2 minutes to 48 hours. The technical characteristics are as follows: the wastewater baffles along the multi-electrode, then the short stream of the wastewater is avoided, the chance of enabling a pollutant in the wastewater to be in contact with a high-concentration flocculating agent in an electrolysis plate is increased, the flocculent precipitation is promoted, so that the pollutant treatment effect is improved. The multi-electrode baffling electric flocculation process is suitable for treating inorganic phosphorus wastewater at medium and low concentrations, needed equipment is simple, easy in operation and low in cost, and runs stably, so that the process is an electrochemistry phosphorous removal process having a high potential.

The invention provides a sewage biochemical processor, comprising a shell body, a water distributor, an aerator, filling materials, a supporting board and a mud-water-gas separating device that are arranged in the shell body, an inlet tube, an outlet tube and a mud discharging tube that are connected with the shell body and arranged outside the shell body, and gas gathering holes arranged at the top part of the shell body. The invention is characterized in that: the mud-water-gas separating device is formed by inclined boards or inclined tubes that are arranged on the upper part of the shell body in an inclined way and in parallel with each other, a drug feeder is arranged between the filling materials and the mud-water-gas separating device in the shell body and connected with a drug feeding tube arranged in a drug feeding device outside the shell body, and a return tube, the upper end and the lower end of which is communicated with the outlet tube and the inlet tube, is provided. The invention has reasonable and compact structure and compound filling materials that are in reasonable arrangement, thus, biochemical effects of biological oxidation, flocculation and absorption, etc. to the sewage and physical and chemical effects of filtration, micro-flocculation, sedimentation, etc. can be completed in the same tank body, thereby having the advantages of high treatment efficiency, rapid start, low cost, simple operation, easy maintenance and lower operating cost.

The invention discloses a bidirectional flow internal circulation type PS advanced oxidation reactor and a sewage treatment method. The bidirectional flow internal circulation type PS advanced oxidation reactor comprises a reactor, wherein an inner barrel and an outer barrel which are staggered up and down and are concentric to each other are arranged in the reactor; the upper end of the inner barrel is open; the lower end of the inner barrel is connected with the bottom of a reactor tank; the upper end of the outer barrel is connected with the top of the reactor tank; the lower end of the outer barrel is open; the bottom of the reactor tank is provided with a power-free self-priming backflow system and an umbrella-shaped conical water distributor; the lower end of a catalyst dosing pipe which stretches to the bottom from the top of the reactor tank is correspondingly communicated with an umbrella-shaped conical medicine distributor; the umbrella-shaped conical medicine distributor is positioned in a water-distributing mixed area of the reactor; the reactor also comprises a circular water distribution baffle, a water inlet mixing device and a secondary dosing device. The reactor is small in height-diameter ratio, the reaction space is fully utilized, the capacity load rate is high, the power consumption is low, the unreacted pollutants and agents are repeatedly treated in the power-free backflow system, the agent utilization rate is improved, the agent consumption and energy consumption are reduced, and the cost is reduced.

The invention relates to an upflow subregion anammox bioreactor, comprising a reactor body, wherein the reactor body is divided into a water inlet buffer region, an upflow reaction chamber and a three-phase separation region from bottom to top; the water inlet buffer region comprises a water inlet pipe arranged at one side of the bottom of the reactor body, the upflow reaction chamber is connected with a settling chamber of the three-phase separation region by virtue of an increasing coupling, an outer barrel of the settling chamber is internally provided with a three-phase separation chamber, a gas collecting chamber is arranged above the three-phase separation chamber, a gas collecting hood separated from the settling chamber is arranged at the top of the gas collecting chamber, an air outlet is arranged at the top end of the gas collecting hood, the upflow reaction chamber comprises a plurality of subregion reaction chambers which are separated by semi-opened baffles, the openings of the baffles are downward, and the baffles are connected to the wall of the reactor body in a left-right cross connecting way, the subregion reaction chambers are communicated by virtue of the baffles, and the side of the reactor body at the upper part of each subregion reaction chamber is provided with an exhaust port used for escaping part of nitrogen. By adopting the bioreactor provided by the invention, effective separation of water, gas and mud is realized, sludge loss is reduced, short circuit is avoided, and effective working space of the bioreactor is increased.

The invention discloses a crystallizing-dephosphorizing reactor. A water distribution zone, a reaction zone and a sedimentation zone are arranged from bottom to top on a crystallizing-dephosphorizing reactor body, wherein the water distribution zone is provided with a slag discharge pipe, a water inlet pipe, an up-flow column disk type distributor and an aeration device which is formed by the combination of an aeration pipe and an aeration head, the lower part of the reaction zone is provided with a carrier inlet and a drug inlet pipe, the upper part and the lower part at the middle of the reaction zone are provided with a first back flow pipe and a second back flow pipe, the sedimentation zone is provide with a water outlet weir, a water outlet pipe and a discharging opening, the upper part of the water outlet weir is provided with a saw-toothed overflow weir, the lateral side of the water outlet weir is provided with two parallel baffles, and the bottom of the water outlet weir is provided with an inclined board. The crystallizing-dephosphorizing reactor has clear functions; the water distribution zone is provided with the up-flow column disk type distributor which can effectively prevent short-circuiting of fluid; the reaction zone is provided with a carrier which can enhance calcium phosphate salt crystallization; the crystallizing-dephosphorizing reactor adopts a running method of 'continuous feed-intermittent aeration' to prevent the carrier from blocking, and facilitates desorption and recovery of crystals on the carrier; the sedimentation zone is provided with the saw-toothed baffles and the water outlet weir, the water flows out evenly, and the solid-liquid separation is good by providing the inclined board.

The invention is a transversal volumetric energy-saving electric water heater, comprising casing, inner container, cold water inlet pipe and hot water outlet pipe combined with the inner container, temperature sensor and heating component equipped in the inner container, and heating controller connected with the temperature sensor and the heating component, where a baffle for stopping cold and hot water directly mixing is arranged in the inner container, one end and two sides of the baffle are connected with the inner container and the other end is a space apart from the end face of the inner container and the space acts as a channel for cold water to enter hot water region; the part of the cold water inlet pipe inserted in the inner container is in the bottom of the inner container and the cold water outlet is opposite to and close to the end face of the inner container connected with the baffle; the part of the hot water outlet pipe inserted in the inner container is on the top of the inner container and the hot water inlet is opposite to and close to the end face of the inner container connected with the baffle. And it not only reduces the mixing degree of cold and hot water in the inner container but also solves the short-circuit problem between the cold water outlet and the hot water inlet.

A novel intelligent electric flocculation treatment apparatus of power plant coal-containing wastewater is characterized in that the apparatus comprises a coal water primary precipitation tank (1), a secondary precipitation tank (3), a high frequency pulse power supply (7), a vertical electric flocculation box (8), a micro-aeration blower (11), a clarifier (14), a middle water tank (17) and a clear water tank (24), the middle-upper portion of the vertical electric flocculation box (8) is provided with a pole plate (9), the lower portion of the vertical electric flocculation box (8) is provided with a mud hopper (10), coal water goes through an elevator pump (18), enters the vertical electric flocculation box (8) and is electrically flocculated, the electrically flocculated coal water automatically flows into the clarifier (14) and is clarified, the clarified coal water flows into the middle water tank (17), the coal water is conveyed to a valveless filter (19) through a middle water tank elevator pump (18) and is filtered for reuse, an inlet water online turbidity meter (6) is in current connection with the high frequency pulse power supply (7), and the electric flocculation current is automatically adjusted according to the turbidity change of the inlet water. The running of the apparatus can be fully automatically controlled. The apparatus has the characteristics of novel technology, automatic control, stable running, energy consumption and investment cost saving, and substantial environmental and economic benefits.

The invention relates to a domestic sewage treatment system, which includes a grid, a regulating tank, an anoxic tank, an aerobic tank, a precipitation tank and a disinfection tank. The input end of the grid is connected to the input end of the regulating tank, the output end of the regulating pool is connected to the input end of the anoxic tank, the output end of the anoxic tank is connected to the input end of the aerobic tank, the output end of the aerobic tank is connected to the input end of the precipitation tank, and the output end of the precipitation tank is connected to the input end of the disinfection tank. The domestic sewage treatment system provided by the invention has the characteristics of good treatment effect and good effluent water quality.

The invention provides composite filler for biologically filtering industrial waste gas, which has large porosity, low stacking density, high strength and strong acid-base buffer capability and is formed by combining inorganic media with organic media, wherein the organic media comprise bark and composting manure; the weight ratio of various media of the bark to composting manure to ceramic particles to plastic balls to shell is (98-104):(53-60):(84-90):(50-56):(100-105). The stacking density of the composite filler is 450kg / m<3>, the porosity is 55.5 percent and the ratio of carbon to nitrogen is 100:5. Compared with the current common biofiltration filler, the composite filler has the characteristics of large porosity, low stacking density, high strength and the like. Particularly, withstrong acid-base buffer capability, the problem which cannot be solved by the prior art can be solved. The invention not only can provide reasonable environment conditions for degraded strains to stably grow for a long term and benefit the proliferation and biomembrane forming of the degraded strains on the surface of the filler, but also benefit the diffusion of gas on the biomembrane on the surface of the filler.

Belonging to the technical field of sewage recycling treatment, the invention relates to an integrated device and method for efficient magnesium ammonium phosphate crystallization and solid-liquid separation. A mixed reaction crystallization zone is connected to water intake pumps; a solid-liquid separation zone is disposed between an inner cylinder and an outer cylinder; a buffer zone is under the mixed reaction crystallization zone; an MAP sludge zone is disposed in a cone at the bottom of a reactor, and the bottom is connected to a large aperture valve; a water outlet zone is arranged at the top of the reactor, and employs an overflow water discharge way. The reactor operation includes crystallization reaction and solid-liquid separation processes. The reactor device adopts rapid mechanical stirring way to accelerate crystallization reaction, thus improving the reactor treatment capacity; at the same time, a baffled continuous flow treatment way with the same inflow and outlet waterdirection is employed to prolong the flow path of materials in the reactor, so that the crystallization reaction and solid-liquid separation process can be more complete; by setting an inclined platein the solid-liquid separation zone, efficient solid-liquid separation can be achieved, and MAP loss and secondary pollution can be avoided during water discharge.

The invention discloses a water purifying method of a uniform flow constructed wetland. A constructed wetland is established; a water inlet end is arranged on one wall of the wetland pool, and a water outlet end is arranged on the other wall of the wetland pool; the water inlet end and the water outlet end are respectively provided with a water distributing zone and a water gathering ground, which are filled with cobblestones with a particle size of 30-50mm; a main body filling material zone comprises, from top to bottom: a first layer filter pack filled with a quartz sand filling material with a particle size of 0.1-1 mm, a second layer filter pack filled with a quartz sand filling material with a particle size of 0.1-3mm; a third layer filter pack filled with a quartz sand filling material with a particle size of 1-3 mm; a fourth layer filter pack filled with a quartz sand filling material with a particle size of 1-5 mm; a fifth layer filter pack filled with a quartz sand filling material with a particle size of 3-7 mm; and humidogene emergent aquatic plant plants are planted on top of the first layer filter pack. The invention can be used in treatment of household sewage in cities and towns and industrial wastewater of food processing industry and slaughter industry, etc., so as to avoid current short flow and formation of a dead zone and remove pollutants efficiently.

A turbine having an inflow housing is provided. The turbine includes an inlet for an inflowing working fluid, wherein the inlet can be closed by a quick closing valve, a plurality of control valves and at least two nozzle groups. The flow of the working fluid is controllable by the inlet into the nozzle groups via the control valves. Furthermore, the inlet can be connected via an inlet line to the first nozzle group, wherein the inlet line is guided through the primary control valve such that the flow of the working fluid along the inlet line can be controlled using the primary control valve. The secondary control valve connects the first nozzle group to the second nozzle group such that the flow of the working fluid from the first nozzle group into the second nozzle group may be controlled using the secondary control valve.

The invention provides a helical flow dephosphorization reactor. The helical flow dephosphorization reactor comprises a pre-backwashing zone, a gas stripping lifting zone, a water discharging zone, a filtering zone, a water feeding zone, a backwashing zone and a solid-liquid separation zone from bottom to top; the pre-backwashing zone comprises an inverted bench body, and an escape tube is arranged below the inverted bench body; the gas stripping lifting zone comprises a gas stripping tube, and the lower end of the gas stripping tube is provided with a gas stripping gas inlet tube; the water discharging zone comprises a filtered water collecting tube, and the filtered water collecting tube is coaxially arranged outside the gas stripping tube; the filtering zone comprises a lower cylinder, and the lower cylinder is coaxially arranged outside the filtered water collecting tube; the water feeding zone comprises a water feeding tube, and the water feeding tube is connected with the upper end of the lower cylinder; the backwashing zone comprises a backwashing air tube, the backwashing air tube is connected with the upper end of the gas stripping tube, and an efficient stripping tube is connected with the top of the gas stripping tube; and the solid-liquid separation zone comprises an upper cylinder, and the upper cylinder is connected with the top of the lower cylinder. The reactor has the advantages of continuous running, tending towards a laminar flow state, small dead zone area, high filtering and backwashing efficiency, reasonable and concise structure, convenient processing and convenient popularization application.

The invention provides a coal mine domestic wastewater treatment device and a treatment method. The coal mine domestic wastewater treatment device comprises a grille well, an adjustment tank, a pre-sedimentation tank, and a simultaneous biological oxidation tank (SBOT), wherein the grille well, the adjustment tank, the pre-sedimentation tank, and the SBOT are orderly communicated along a coal mine domestic wastewater flow direction. The SBOT is separated into N little tanks along a direction perpendicular to the bottom of the SBOT. Each one of the N little tanks is provided with an upper flowchannel, carriers intercepted by an upper carrier interception grille and a lower carrier interception grille and a lower flow channel close to the bottom of the SBOT, wherein an aerated pipe is arranged between the lower carrier interception grille and the lower flow channel and a dredge pipe is arranged at the bottom of the SBOT and is communicated with the outside environment. The coal mine domestic wastewater treatment device and the treatment method can effectively reduce the content of organic matters in coal mine domestic wastewater, the content of ammonia nitrogen in coal mine domestic wastewater and the content of total nitrogen in coal mine domestic wastewater, avoid the use of a secondary sedimentation tank and an activated sludge backflow system, greatly simplify coal mine domestic wastewater treatment processes, and reduce coal mine domestic wastewater treatment device costs.

An electrical machine, in particular a rotary current generator for motor vehicles, is proposed which has a housing (13) in which a stator (16) is retained, such that a coolant can flow around the outside of the stator (16) from one of its axial face ends (57) to a circumferential region of the stator (16), defining a flow cross section of the flow course through the stator (16) and the housing (13). The flow course is defined toward the stator by outer stator teeth (62) located on the outer circumference of the stator (16).

The invention discloses a precipitation device for preventing anaerobic fermentation of sludge and a sewage treatment system, belongs to the technical field of sewage treatment, and aims to solve theproblem of anaerobic metabolism caused by sludge deposition in the prior art. The precipitation device comprises a shell, an aerobic tank located in the shell and a sedimentation tank located in the aerobic tank; the bottom wall surface of the sedimentation tank is of a curved surface structure; the size of the bottom of the sedimentation tank is gradually reduced from the end away from the bottomof the aerobic tank to the end close to the bottom of the aerobic tank; the bottom of the sedimentation tank is located above the bottom of the aerobic tank; a gas stripping device is arranged belowthe sedimentation tank; the gas stripping device is communicated with the bottom of the sedimentation tank; the concentrated sludge settled to the bottom of the sedimentation tank flows back to the aerobic tank through the gas stripping device. On one hand, the device is beneficial to sliding of the settled sludge in the sedimentation tank, and anaerobic fermentation caused by sludge deposition can be avoided; on the other hand, the sludge at the bottom of the sedimentation tank can be quickly transferred and circularly flows, and anaerobic fermentation caused by sludge deposition is further avoided.

The artificial wetland effluent collector as one effluent collector for sewage treating artificial wetland includes two parts, a buffering gravel region and a water collecting groove. The buffering gravel region has a perforated water distributing wall for controlling water flow from the wetland and ensuring homogeneous distribution of the inflow, and a flute-shaped collecting pipe in the effluent side for collecting water. The flute-shaped collecting pipe comprises several flute-shaped pipes with valve and water collecting unit. The present invention can ensure the pseudo-parallel flow state of sewage in the wetland.

The invention belongs to the technical field of environmental protection and particularly relates to a denitrification treatment device for a modularized vertical subsurface flow constructed wetland. According to the denitrification treatment device for the modularized vertical subsurface flow constructed wetland, a conventional constructed wetland is divided into different functional areas, such as a plant water distribution area, a reoxygenation area and an anoxic area. The division of these functional areas is performed through plenty of small modules, so as to facilitate construction, facilitate surface matrix replacement, facilitate aeration of a wetland system, improve wetland processing capacity and better facilitate follow-up maintenance of the wetland.