77results about How to "Increase surface load" patented technology

The invention mainly discloses a middle-set type high density sediment water purification tank and a purification technology thereof. The middle-set type high density sediment water purification tank comprises a reaction region, a clarification region and a sludge transfer tank. The reaction region comprises a mixing tank and a flocculation tank; the clarification region comprises a pre-sedimentation region, a sludge concentration region, an inclined pipe sedimentation region and a clear water canal, wherein the sludge concentration region is arranged at the bottom of the clarification region, the inclined pipe sedimentation region is arranged above the clarification region, and the clear water canal is connected with a water outlet pipe through a finger type water collecting tank positioned above the inclined pipe sedimentation region. A plurality of conical sludge collecting pits are arranged at one side of the bottom surface of the clarification region, and a sludge scraper is arranged on the bottom surface of the clarification region; a gas stripping device which lifts sludge in the sludge collecting pit to a sludge discharging groove at the upper part of the clarification region is arranged in each sludge collecting pit; the gas stripping sludge discharging groove is connected to the sludge transfer tank; the sludge transfer tank is connected with a water inlet pipe through a reflux pump; and simultaneously, the sludge transfer tank is connected with a sludge pump. The middle-set type high density sediment water purification tank has the advantages of having simple tank shape, compact structure and water outlet quality, being beneficial to the control on a sedimentation tank and the concentration and number of returned sludge, ensuring the stability of operation conditions and being low in operating cost.

The invention relates to an improvement on a clarification tank, which is characterized in that: a concrete reaction groove is arranged around the upper part of the wall of the clarification tank; a turbulent devices are arranged in the concrete reaction groove at intervals; vertical spaced corrugated boards are arranged in a built-in reaction chamber; a communicated water channel is arranged between the surrounding reaction groove and the concrete reaction chamber; and vortex coagulation reaction devices with a herringbone or reverse W-shaped structure are arranged at the middle lower part of the clarification tank at intervals. The improved clarification tank well solves the contradiction between full flocculation and land occupation and a plurality of times of mud and water separation due to the fact that the sedimentation, clarification and contacting sedimentation are completed in one tank. An outstanding characteristic of the improved clarification tank is fully improving coagulation and flocculation reaction effects and clarification and separation effects without increasing land occupation, so the clarification tank can realize quick clarification, strong processing capacity, land occupation processing capacity maximization, high-quality effluent and strong impact-resistant and loading capacity.

The invention provides a sewage filter, which synthesizes a shallow tank theory, a dynamic coagulation theory, an accelerated coagulation theory and an inclined plate technology, effectively solves the problem of easiness in blockage of the traditional inclined plate. The sewage filter is used for subdividing raw motion water through by using filter masks and a plurality of through hole structures; and the raw water forms stable eddies at rear edges of plate holes of filter mask bodies. Under the entrainment action of the eddies, non-fluidic substances in the raw water are collected at centers of the eddies and get in continuous contact and collision with one another in eddy cores to undergo a flocculation reaction, and slides down along the mask bodies under the gravity action to settle into a mud collecting hopper, so that the purposes of removing suspended substances in the raw water and cleaning a water body are achieved. The sewage filter can rotate around an axis of a rotating shaft; and a strongly turbulent shear flow is formed through left and right repeated quick rotation to scour an inclined plate at a high speed and to clean deposits and blockages very conveniently.

The invention is directed to a method for flotation separation. The method has the steps of feeding an influent stream containing liquids and solids to a vessel, while removing clarified liquid at the same time as the feeding process. The method employs a step for emptying the solids from the vessel based on the solids having formed a float blanket of a predetermined depth. The solids are removed from the vessel through a bottom nozzle as opposed to being skimmed off the top surface with mechanical separators. The depth of the float blanket can be monitored. Once it is determined that the float blanket has reached the predetermined depth, the feed to the vessel is stopped and the vessel is emptied of liquids and solids through a suitable outlet other than the feed inlet, by an arrangement of valves and lines.

The invention relates to the improvement of a separation inclined pipe and a clarifying / precipitating device for clarifying and precipitating in a water treatment process, which is characterized in that parallel opposite wave plates which form an inclined pipe are oppositely and adjacently arranged at intervals; the adjacent space is provided with separated inclined plate strips which are arranged up and down at intervals; and the water inlet and outlet of the inclined pipe and the separated inclined plate strips are parallel or approximately parallel. Compared with the mud-water separation of an incongruous flow of the existing inclined plate and inclined pipe, the inclined pipe provided by the invention has higher surface load, higher mud-water separation efficiency and better mud-waterseparation effect and can effectively separate tiny suspended matters which can not be precipitated and separated originally, the quality of the separated water is better, the muddy matters are removed completely, and the treatment is more stable. The clarifying / precipitating device provided by the invention can enhance the efficiency by above 30% and can obviously improve the water quality. The invention adopts grid turbulence flocculation, can be beneficial to improvement of the quality of the clarified / precipitated water and can realize basically powerless flocculation. The separation inclined pipe and the clarifying / precipitating device provided by the invention can be used for clarifying in various water supply treatments and recycled water treatments and for precipitating in sewage treatment.

The invention discloses an eccentric-type arc movable slant board which can be used for accelerating the deposition process in sewage treatment process, clearing a water body, and improving the sewage treatment effect. According to the invention, thin boards are wound to be arc with different sizes, and are ranked at equal or variable distances so as to form groups; an eccentric shaft is fixed on a rotary shaft; the clearances of adjacent arc boards form a plurality of shallow layer deposition tanks; and treated water bodies and settled deposition objects move mutually and stably in the deposition shallow layers and are separated; the eccentric arc slant boars are rotated to shift radially and tangentially, so that water bodies at the shallow layers are subjected to gradient shearing transformation, and flocculant cores are in mutual contact, collide, adhere and polymerize so as to form dense flocculant bodies so as to be separated from water, and raw water is cleared and purified. The eccentric-type arc movable slant board provided by the invention can rotate around the rotary shaft, forms intense and turbulent shearing flows through rapid and reciprocating rotation left and right, is subjected to the high-speed washing effect, and can be used for eliminating possible deposition and blocking conveniently.

The invention provides a sliding member including a plurality of holes formed on a sliding surface thereof, which sliding surface is adapted to slide on a mating member, at least one of the holes having an enlarged portion in at least a portion between an opening end and a bottom end thereof, the enlarged portion being larger than the opening end on the sliding surface.

The method of sewage processing has high nitrogen-phosphorus disloading ratio. It includes following process steps: pretreatment is to make sewage will be processed pass through grille to get rid of impurities; precipitating treatment is to do precipitating to the pretreated sewage in sedimention tank to get rid of grits; ecological filtering treatment is to send the sewage precipitation processed into worm lizard tower-type ecological filter to make the processed sewage reaching standard.

The invention discloses a shell-and-tube type hollow sleeve tube resistive heater, a heating assembly in the resistive heater are double layer hollow resistive sleeve tubes, each double layer hollow resistive sleeve tube consists of nested inner and outer layer heating tubes, tail parts of every two double layer hollow resistive sleeve tubes are connected via flexible electrode connection sheets, and a U-shaped return circuit can be formed. The shell-and-tube hollow sleeve tube resistive heater is simple and ingenious in structure, high in temperature increase rates, high in efficiency, small in pressure loss, high in convenience of usage and operation, great in fastness, complete in safety protection measures, wide in adjustment scope, high in temperature control precision and high in adjusting speed; problems of a conventional electric heater including non-uniform fluid medium heating and specifically gas heating, poor gas heat exchanging effect, short service life, severe local overheating of electric heating elements and the like can be solved; technology requirements can be reached, and safe and stable production can be ensured.

The invention relates to a biofilter tower exhaust gas purification system, which achieves the aim of purification by applying immobilized microorganisms to degradation of harmful and toxic components in the exhaust gas. The system consists of a biofilter tower unit and a spray unit, wherein the biofilter tower unit comprises a tower body, an exhaust inlet on the upper part of the tower body, a plurality of communicated filter chambers which are separated by a plurality of baffles, and a multi-layer surface modified foam ceramic carrier and a purified gas outlet which are arranged in each filter chamber. The system is characterized in that: 1) exhaust gas in a plurality of filter chambers in the filter tower passes through continuously in a sinuous motion track; and 2) an immobilized microorganism carrier adopts the novel surface modified foam ceramic for the first time. The spray unit comprises a pump, a nozzle, a regulating tank, a circulating water tank, a humidity sensor, a controller, a pH meter and the like and ensures proper humidity, nutrition and pH in the filter tower to allow the microorganisms to grow normally. The biofilter tower exhaust gas purification system has the advantages of: 1) good mass transfer performance without open circuit, and easy realization of equipment production; 2) large surface loads and mass loads; 3) large biological loads; 4) good high-concentration toxic pollutant resistance; and 5) capability of realizing ideal empty tower retention time.

The invention provides a silicon-carbon composite material, a preparation method thereof, a lithium battery negative electrode material and a lithium battery. The preparation method comprises the following steps: S1, mixing nano silicon, a carbon source, an etching agent, a binder and a solvent to obtain a mixture; S2, performing primary carbonization treatment on the mixture to obtain a graphene-like carbon film coated silicon material; S3, mixing the graphene-like carbon film coated silicon material, a carbon series conductive agent and a polymer conductive agent, and carrying out compactionmolding to obtain a molded material blank; and S4, carrying out secondary carbonization treatment on the molded material blank to obtain the silicon-carbon composite material; wherein the etching agent is an alkali metal salt. Through the synergistic effect of the primary carbonization treatment and the secondary carbonization treatment, the silicon-carbon composite material with longer cycle life and better rate capability is obtained.

The invention discloses a sludge layer filtering and settling pond and a method thereof. The sludge layer filtering and settling pond comprises a pond body, a water-in pipe, a water-out pipe, a water distributer and a sludge discharging pipe; the water-in pipe is arranged on the lower portion of the pond body, the lower portion of the other side of the pond body is provided with the sludge discharging pipe, the upper portion of the other side of the pond body is provided with the water-out pipe, the periphery of a sludge discharging opening of the sludge discharging pipe is provided with a fence with the upper portion being open, a sludge hopper is formed, the periphery of a water outlet of the water-out pipe is provided with a slag insulation plate with the upper portion being open, and a clear water hopper is formed; the water-in pipe is further connected with the water distributor arranged in the pond body. The settling speed of muddy water to be treated is higher than the upward flowing speed of the muddy water so that large-particle suspended solids can be settled at the bottom of the pond body to form a sludge filtering layer, and when the muddy water to be treated is continued to be introduced into the pond body from the water-in pipe, impurities in the muddy water to be treated are either intercepted or condensed into large particles in the process of flowing through the sludge filtering layer. The sludge layer filtering and settling pond is large in surface load, good in quality of output water and easy to operate and manage and can further remove organic pollutants dissolved in the muddy water.

The invention discloses a land-saving type efficient nitrogen and phosphorus removal sewage treatment device and method. The land-saving type efficient nitrogen and phosphorus removal sewage treatmentdevice comprises a pretreatment unit; the left end of the pretreatment unit is provided with a water inlet; the right end of the pretreatment unit is communicated with the left end of an anaerobic pool; the right end of the anaerobic pool is communicated with the left end of a first-stage aerobic pool; the right end of the first-stage aerobic pool is communicated with the left end of a secondarysedimentation pool; the right end of the secondary sedimentation pool is communicated with the left end of an anoxic pool; the right end of the anoxic pool is communicated with the left end of a secondary-stage aerobic pool; the right end of the secondary-stage aerobic pool is communicated with the left end of a deep treatment unit; the right end of the deep treatment unit is provided with a wateroutlet; and the anoxic pool and the secondary-stage aerobic pool are both filled with a biological membrane filler. The traditional A / A / O technology is improved into combination of front section A / Oadopting an activated sludge method and post A / O adopting a pure biological membrane method; and compared with the activated sludge method and a sludge-membrane mixing technology in the past, the combination greatly saves the occupying area while strengthening the pollutant effect.

Disclosed here is a system and method for analyzing and / or detecting one or more target analytes in a sample by using a competitive assay. A standard curve may be constructed using known amounts of a molecule that is identical or substantially identical to the target analyte. Signals obtained from the target analyte can be compared against the standard curve in order to determine the level of the target analyte in the sample. The disclosed methods may be used in a multiplexed analyte detection and quantitation system.

The invention relates to a sequencing batch type static sedimentation method and a system thereof, wherein the method comprises the following steps: at the first static sedimentation pond water intake and decanting stage, under the hydraulic action, the supernatant is lifted layer by layer, is overflown and discharged by a water outlet weir of an air weir water decanting machine; when the replacement ratio of the supernatant to earth water mixed liquid reaches the set value, and the first static sedimentation pond water intake and decanting stage ends; the reaction stage starts, wastewater after pre-treatment or biochemical treatment is subjected to re-treatment, and the reaction stage ends when the preset reaction time achieves, the first static sedimentation pond enters the static sedimentation stage, sludge is freely settled in static current, and the static sedimentation stage ends when the preset static sedimentation time achieves; and while the first static sedimentation pond enters the reaction stage, the water intake and decanting stage of a second static sedimentation pond starts, and actions in the first static sedimentation pond are repeated. The whole sedimentation process is completed by the sequencing batch type static sedimentation system formed by at least two static sedimentation ponds, thereby overcoming the defects existing in the dynamic sedimentation mode and having the advantages of strong practicability, high sedimentation efficiency, convenient operation and maintenance, compact structure, high land use rate and the like.

The invention discloses a method for treating washing wastewater of coal chemical industry. The method comprises the following steps: firstly, carrying out partial removal on tar, suspended impuritiesand other macromolecular substances in the wastewater through a magnetic flocculation precipitation strengthening flocculation effect, then carrying out ultraviolet activated persulfate oxidation toexcite generation of sulfate radicals, effectively carrying out ring opening on refractory organic matters such as pyridine and quinoline to be decomposed into easily degradable substances such as allyl alcohol and acetamide, and thus improving the removal rate of the refractory organic matters and improving the biodegradability of the wastewater; reusing an photoelectric-Fenton oxidation method,producing a Fenton reagent by using an electrochemical method to treat the wastewater, and meanwhile, introducing ultraviolet light, wherein the ultraviolet light and Fe<2+> have a synergistic effecton the catalytic decomposition of H2O2, so that the decomposition rate is greatly improved, the refractory organic matters can be effectively treated, the degree of mineralization is high, secondary pollution cannot be generated, the operation is simple, the control parameters are only voltage and current, and the automatic control can be conveniently realized.

The invention relates to a dispersed sewage treatment device. A container type structure is adopted, the inner space of a container is divided into two biochemical reaction regions, a mud and water separation region and an equipment control chamber by separation plates, biological fillings are fed into the biochemical reaction regions, in addition, porous separation plates are adopted for intercepting the fillings, inclined pipes or inclined plate fillings are filled in the mud and water separation region, supernatant liquor in the mud and water separation region is sterilized through ultraviolet rays to obtain the final effluent, and the effluent can reach first-level B standards of pollutant discharge standards for municipal wastewater treatment plant. The dispersed sewage treatment device has the advantages that the structure is compact, the operation is simple, the treatment efficiency is high, and the transportation and the installation are convenient and fast.

The invention discloses a bioelectrode and application of the bioelectrode in an artificial wetland. The bioelectrode comprises a pipe body; a negative pole; a positive pole; an argil basin, which isarranged at the upper end of the pipe body, wherein the negative pole extends into the argil basin, and the positive pole bypasses the argil basin and extends into the pipe body; and a protective cover, which is arranged at the upper end of the pipe body and is positioned above the argil basin. According to the bioelectrode, a distance between the positive pole and the negative pole is shortened;the argil basin is arranged between the positive pole and the negative pole and serves as an interlayer, and the advantage of oxidation-reduction potential gradient is improved while an inner circuitis allowed to be in an on state; and long-term efficient degradation of organic matters in an anaerobic zone of the positive pole is achieved by reducing the internal resistance of a microbial fuel cell. When the bioelectrode is used for constructed wetland sewage treatment, the surface load of COD can be improved by 30% or more.

An integrated high-density coal water treatment clarifier comprises an agglomerating zone, a flocculating zone, a water distributing zone, a settling zone, an inclined plate, a clear water zone and agravity filtration zone, wherein the flocculating zone is formed in one side of the agglomerating zone, and is communicated with the bottom of the agglomerating zone; the water distributing zone is arranged on one side of the flocculating zone; the water distributing zone is communicated with the settling zone; the clear water zone is arranged on one side of the settling zone; the settling zone iscommunicated with the clear water zone; a filtering zone is arranged on one side of the clear water zone, and clear water in the clear water zone can flow into the filtering zone. Through the integrated high-density coal water treatment clarifier, coagulation is divided into an agglomerating process and a flocculating process; in the agglomerating zone and the flocculating zone, an appropriate speed gradient G value and an appropriate dwell time T value for the agglomerating process and the flocculating process are controlled in a mechanical stirring form respectively; meanwhile, through internal circulation of sludge in a flocculating tank, the flocculating effect of coal-containing wastewater is strengthened, the floc density is increased, mud-water separating and settling performance are enhanced, the coal-containing wastewater is rapidly, efficiently and stably treated effectively, and a recycling standard thereof is met; therefore, the integrated high-density coal water treatmentclarifier has good economic and environmental benefits.

The invention provides a sewage filter, which synthesizes a shallow tank theory, a dynamic coagulation theory, an accelerated coagulation theory and an inclined plate technology, effectively solves the problem of easiness in blockage of the traditional inclined plate. The sewage filter is used for subdividing raw motion water through by using filter masks and a plurality of through hole structures; and the raw water forms stable eddies at rear edges of plate holes of filter mask bodies. Under the entrainment action of the eddies, non-fluidic substances in the raw water are collected at centers of the eddies and get in continuous contact and collision with one another in eddy cores to undergo a flocculation reaction, and slides down along the mask bodies under the gravity action to settle into a mud collecting hopper, so that the purposes of removing suspended substances in the raw water and cleaning a water body are achieved. The sewage filter can rotate around an axis of a rotating shaft; and a strongly turbulent shear flow is formed through left and right repeated quick rotation to scour an inclined plate at a high speed and to clean deposits and blockages very conveniently.

The embodiment of the invention provides an aeration tank, a sewage treatment system and a sewage treatment method. The aeration tank includes an aeration zone and a sedimentation zone which are communicated with each other, the sedimentation zone is provided with at least a set of inclined precipitation assemblies in a vertical direction, a plurality of inclined flow channels are formed in the inclined precipitation assemblies, and the inner walls of the inclined flow channels block sediments in a water flow as the water flow flows from the bottoms of the inclined precipitation assemblies tothe tops of the inclined precipitation assemblies. At least one set of the inclined precipitation assemblies are arranged in the sedimentation zone, after sewage enters the sedimentation zone from theaeration zone, the water flow flows from the bottom of the sedimentation zone to the top of the sedimentation zone, a sediment carried in the sewage collides with the side walls of the inclined flowchannels formed on the interiors of the inclined precipitation assemblies so as to be blocked by the side walls of the inclined flow channels, the sedimentation occurs, the surface loads of the precipitation assemblies in the sedimentation zone are increased, the sludge deposition efficiency and the sewage treatment efficiency are improved, and an equipment investment cost is reduced.

The invention relates to a metal connecting plate (1) of a chain link of an energy chain, which metal connecting plate has two ends (2, 3), wherein one end (2) has first elements (4) and the other end (3) has second elements (5), wherein the first elements (4) can be inserted into the second elements (5) of a further connecting plate (1) in such a way that the connecting plates (1) are rotatably connected to each other. The first and second elements (4, 5) are each formed by a hole (6, 7) having a border (8, 9). The borders (8, 9) form stop surfaces (10, 11) corresponding to each other, which stop surfaces protrude substantially perpendicularly to an extent of the connecting plate (1).

The invention belongs to the technical field of sewage deep treatment, and specifically relates to an improved enhanced phosphorus removal device and phosphorus removal process. The process provided by the invention is mainly used for the situation that the phosphorus concentration of effluent water after a biological sewage treatment process still can not reach the standard, and is characterized in that a phosphorus removal reagent is added to influent water in a secondary sedimentation tank to enhance flocculating phosphorus removal; and an inclined plate or inclined tube is arranged in a sedimentation tank to perform mud-water separation and flocculating phosphorus removal of effluent water from a biochemical tank in the same tank, thus improving the sedimentation efficiency and the effluent water effect. The improved enhanced phosphorus removal device and phosphorus removal process are applicable to the deep phosphorus removal demand after biological treatment, improve the effluent water quality standard and lower the investment and project cost of a sewage plant.

The self-supporting weather proof dome envelops outdoor objects. The dome is made of a material and structure that maintains the shape of the dome and clearance between the dome and the objects whereby the dome has an inner structure that withstands external pressure forces and an outer structure that through pulling forces on the outer structure holds the inner structure together. The outer and inner structures are not bonded to each other and at least the outer structure is attachable to a base mount. The dome consists of an inner structure made of form rigid cellular plastic. The enveloped outer structure consists of an UV-resistant plastic fabric wind-stopper.

The invention relates to an anaerobic baffled reactor suitable for dyeing and finishing wastewater treatment. The anaerobic baffled reactor comprises a box body (1), middle water baffles (3), baffling chambers (12) and a sedimentation tank (8), wherein a plurality of clapboards (16) are arranged in the box body (1) vertically and uniformly, so that the box body (1) is divided into a plurality of baffling chambers (12); the middle water baffles (3) are arranged in the baffling chambers (12) vertically; baffling boards (4) are connected to lower ends of the middle water baffles (3); filling layers are arranged between the upper ends of the clapboards (16) and the middle water baffles (3); an anaerobic granular sludge layer is paved at the bottom of each baffling chamber (12); a backflow chamber (5) is arranged at the right end of the box body (1); a water inlet pipe (13) is arranged on the left side of the box body (1); and the sedimentation tank (8) which is communicated with the water inlet pipe (13) is connected to the upper end of the right side of the box body (1). The anaerobic baffled reactor has a simple structure, has excellent sludge interception performance and high impact load resistance, and has unique advantage in the treatment of printing and dyeing wastewater with high chromaticity.

The fabrication equipment as a loading device relates to fuel cell, catalysis thin membrane, gaseous diffusion layer and procedure of making solid pole. The equipment includes base, frame, column, X-auxiliary girder, X-axis, Y-motor screw rod, heat plate and spraying gun, which is connected to X-motor on X-axis setup at X-auxiliary girder. The screw rod in bearing seat is connected to gearwheel, which is on Y-axis. The heat plate is setup on base. Features of the equipment are: good mechanical stiffness, high kinematic accuracy and good spray-painting effect. Comparing prior art, the equipment has advantages: of saving catalyst of noble metal, even thickness, good repeatability and reliable performance.

The invention provides a sedimentation basin and a sewage treatment system with the sedimentation basin. The sedimentation basin comprises a body and at least one water outlet channel, wherein the body comprises an inner cavity and multiple water distribution inlets communicated with the inner cavity, and the multiple water distribution inlets are formed in a vertical direction at intervals; the water outlet channels and the water distribution inlets are formed in a first horizontal direction at intervals; and multiple layers of circulating flow fields which are sequentially arranged from top to bottom are formed in the vertical plane of the body in the process of enabling water flow entering the inner cavity through the multiple water distribution inlets to flow to the water outlet channels. According to the technical scheme of the invention, the problems in the prior art that the sedimentation basin has only one sedimentation surface, the surface load is relatively small and the sewage treatment amount is relatively small can be solved.

The embodiment of the invention discloses a water quality detection device which comprises a detection cylinder detachably communicated with a water inlet pipe, a detection box for separating and detecting water impurities, a water quality probe and an impurity probe, one end, far away from the water inlet pipe, of the detection cylinder is communicated with a drainage pipe; and astirring unit is arranged in the detection cylinder; the water quality probe is arranged in the detection cylinder; the detection box comprises a box body and a plurality of V-shaped plates; an inlet hole and an outlet hole are respectively formed in two sides of the box body; the drainage pipe horizontally and transversely penetrates through the box body; the inlet hole is communicated with the drainage pipe through a transition pipe; a plurality of V-shaped plates are stacked, the V-shaped plates are parallel to the drainage pipe, openings of the V-shaped plates face downwards, water flows through the V-shaped plates, and gaps between the edges of the two sides of every two adjacent V-shaped plates form impurity outlets; the impurity probe is arranged at the bottom of the box body and located below the opening. According to the water quality detection device disclosed by the embodiment of the invention, detection on water quality and impurities in water can be efficiently completed.

The method of sewage processing has high nitrogen-phosphorus disloading ratio. It includes following process steps: pretreatment is to make sewage will be processed pass through grille to get rid of impurities; precipitating treatment is to do precipitating to the pretreated sewage in sedimention tank to get rid of grits; ecological filtering treatment is to send the sewage precipitation processed into worm lizard tower-type ecological filter to make the processed sewage reaching standard.

The invention relates to an up-to-standard discharge for low-concentration copper-containing wastewater in the semiconductor industry and an efficient sedimentation process. The process comprises thefollowing process steps: 1) adding a FeSO4 solution into the low-concentration copper-containing wastewater; 2) adding a calcium hydroxide solution into an inlet of a pipeline mixer at the bottom of an inclined plate sedimentation tank, and reacting the wastewater with calcium-containing modified sludge flowing back from the inclined plate sedimentation tank; 3) adding a recapturing agent for a chelating reaction; 4) adding polyacrylamide to carry out a flocculation reaction; and (5) introducing the sludge in the inclined plate sedimentation tank for mud-water separation, wherein one part of the sludge is conveyed to a sludge storage tank, the other part of the sludge is conveyed to a pipeline mixer, and performing the step (2). The method has the advantages that the FeSO4-recapturing agent combination is adopted according to wastewater characteristics, the use amount is reduced, the process is simple, the investment cost is low, coagulant adding and calcium hydroxide adding of returned sludge are omitted, the water content is low, the density is high, sludge sedimentation is accelerated, the surface load of the inclined plate sedimentation tank is increased, the occupied area is reduced, and a sludge concentration tank does not need to be arranged.