31results about How to "Improve the efficiency of flocculation and sedimentation" patented technology

The present invention provides a method for preparing high-effective algae flocculant from non-toxic, easy-to-bio-degrade, cheap, natural macromolecular polymer modified clay. Said modification can obviously raise flocculation algae-removing capability of different clay, the algae-removing rate of various clays can be 20-95% Said high-effective algae flocculant can be used for controlling and treating large area red tide, fresh water algal bloom, and also can be used for removing harmful algae in river and drinking water plant.

The invention discloses a small-sized rapid-precipitation environment-friendly sewage treatment device, which comprises a sedimentation tank, a driving motor and a filter tank; A brush plate; a drive shaft is provided under the filter plate, and spiral blades in opposite directions are provided on the left and right sides of the drive shaft. The present invention is equipped with reverse spiral blades and trapezoidal material guide plates to horizontally stir and mix the sewage and flocculants, so that the flocculants can be rapidly diffused and mixed, improving the efficiency of flocculation and sedimentation, and at the same time reducing the impact on the settled sludge. Stir to improve the efficiency of sedimentation; the present invention is provided with a reciprocating brush to avoid clogging of the filter holes and ensure normal filtering; the present invention is provided with a filter plate, a sandstone packing plate and an activated carbon packing plate that are easy to disassemble, and has better Excellent purification effect, easy to disassemble and clean.

The invention relates to mobile skid-mounted equipment for efficient water treatment. The mobile skid-mounted equipment for efficient water treatment can operate continuously or intermittently and is characterized by comprising three independent skid-mounted parts, namely, a pre-treatment flocculent precipitation system, a biological treatment system and a deep membrane treatment system, and the integrated mobile skid-mounted treatment equipment is communicated with a sewage tank through a conveying water pump; in terms of flocculent precipitation, a specific agent is adopted, and suspended matter as well as poisonous and harmful heavy metal and the like can be removed through accurate flocculation, stirring and precipitation; the biological treatment system comprises an aerobic tank, an MBR (membrane biological reactor) tank and the like; the deep treatment device can remove high salt and other ions through filtration of reverse osmosis membranes. The equipment has the benefits as follows: discharged water meets the national discharge or reuse standard after collected waste water in oil and gas fields is treated through the integrated skid-mounted equipment for water treatment. The equipment has the advantages of advanced technique, stable performance, good treatment effect, little investment, simplicity in operation, convenience in management, use and maintenance and the like and is a whole set of mobile treatment device specially designed according to water quality characteristics of the waste water in the oil and gas fields.

The invention relates to a multi-effect water treatment agent, a preparation method thereof and a water treatment method. The multi-effect water treatment agent is prepared from acrylamide oligomer grafting graphene oxide, polyacrylamide, polysilicate aluminum ferrite, poly(diallyl dimethyl ammonium chloride) and sodium bicarbonate, wherein the acrylamide oligomer grafting graphene oxide is prepared by two steps of graphene oxide carboxylation and grafting reaction. The multiple-effect water treatment agent can adapt to multiple complex water qualities, and particularly can effectively remove benzene compounds and heavy metal ions. The water treatment method comprises stages of mixing, preliminary flocculation, secondary flocculation and filtering; the efficient utilization of the water treatment agent is realized by using a lower water backflow step, and the production cost is lowered.

The invention discloses a method for concentrating high-concentration brine. The brine is treated in a circulating efficient sedimentation zone, a circulating ultra-filtration zone, a nano-filtration zone and a high-salt reverse osmosis zone; the method is suitable for treating thick brine of which the salt content is 1-5%; to-be-treated water enters the circulating efficient sedimentation zone firstly and is stirred uniformly by a stirrer in the circulating efficient sedimentation zone, and temporarily hard ions are removed by adding lime, wherein the lime adding quantity is determined according to the temporarily hard level of the to-be-treated inlet water; then the water enters the circulating ultra-filtration zone, water is produced by membrane hole filtration during circulating ultra-filtration, and suspended solid granules are reserved in backflow liquid; a double-circulation operating manner is adopted in the nano-filtration zone, and a part of concentrated water flows back to the circulating efficient sedimentation zone and is further settled; and the other part of concentrated water flows back to the nano-filtration zone as inlet water, and the water produced in the nano-filtration zone enters the high-salt reverse osmosis zone and is concentrated by a reverse osmosis membrane and further desalted by high-salt reverse osmosis.

The present invention discloses method of dewatering concentrated bauxite, and features that during filtering and dewatering concentrated bauxite pulp, compound containing Ca2+ ion is added as the filter aid, with the filter aid adding amount being 0.5-5 wt% of solid concentrated bauxite. The method is simple and practical, and has high concentrated bauxite dewatering efficiency, concentrated bauxite filtering capacity 30-50 % raised, and no influence on the subsequent Bayer process production.

The invention discloses a sewage settling tank, comprising a tank body; a mixing barrel, which has a conical tubular structure and is provided with an opening at the lower end, is arranged at the central axis position of the tank body, and a vertical water outlet pipe is arranged at the central axis position of the mixing barrel; a mixing plate is arranged at the upper end of the vertical water outlet pipe, and is fixedly connected with a center shaft; the center shaft is fixedly connected with liquid outlet pipes which are distributed along the circumference and are communicated with the center shaft. By arranging the vertical water outlet pipe and the liquid outlet pipes, which are arranged opposite to each other, as well as the mixing barrel having the conical tubular structure, the mixing plate and the rotating center shaft, swirling flow is formed under the stirring of the mixing plate during head-on collision and mixing of a precipitant and sewage, so that the efficiency of flocculating precipitation is increased, the volumes of precipitate flocculation blocks are enlarged, and the generation of subsequent precipitate is facilitated; by arranging a vertical helical blade roller and a horizontal helical blade roller which are linked with each other, the sludge can be discharged outside, and a sludge discharge pipe is prevented from being blocked.

The invention discloses a method for preparing bacterium-algae cells through a two-wheel coculturing and flocculation method. The method comprises the steps of 1, conducting the first cycle of coculturing on rice endogenous pantoea which is added for the first time and chlorella under illumination, so that after culturing is ended, a bacterium-algae coculturing solution of the first cycle is obtained; 2, supplementing rice endogenous pantoea which is added for the second time into the bacterium-algae coculturing solution of the first cycle, conducting the second cycle of bacterium-algae coculturing under illumination, so that after culturing is ended, a bacterium-algae coculturing solution of the second cycle is obtained; 3, conducting flocculation collection treatment on the bacterium-algae coculturing solution of the second cycle, so that the bacterium-algae cells are obtained. According to the method, bacterium-algae coculturing is conducted through the rice endogenous pantoea and the chlorella, the growth rate of the algae cells is raised, biomass of the algae cells is increased, meanwhile, flocculation performance of the algae cells is improved, application of chemical flocculating agents and toxic harm to the algae cells are reduced, algae cell collection efficiency is improved, algae cell collection cost is lowered, and thereby industrial production and development and application cost of chlorella are remarkably lowered.

The invention discloses a method for preparing bacterium-algae cells through a two-wheel coculturing and flocculation method. The method comprises the steps of 1, conducting the first cycle of coculturing on rice endogenous pantoea which is added for the first time and chlorella under illumination, so that after culturing is ended, a bacterium-algae coculturing solution of the first cycle is obtained; 2, supplementing rice endogenous pantoea which is added for the second time into the bacterium-algae coculturing solution of the first cycle, conducting the second cycle of bacterium-algae coculturing under illumination, so that after culturing is ended, a bacterium-algae coculturing solution of the second cycle is obtained; 3, conducting flocculation collection treatment on the bacterium-algae coculturing solution of the second cycle, so that the bacterium-algae cells are obtained. According to the method, bacterium-algae coculturing is conducted through the rice endogenous pantoea and the chlorella, the growth rate of the algae cells is raised, biomass of the algae cells is increased, meanwhile, flocculation performance of the algae cells is improved, application of chemical flocculating agents and toxic harm to the algae cells are reduced, algae cell collection efficiency is improved, algae cell collection cost is lowered, and thereby industrial production and development and application cost of chlorella are remarkably lowered.

The invention relates to a purification method of muddy water, in particular to a flocculating agent for rapidly purifying muddy water, and a rapid purification method of the muddy water, mainly aiming at solving the technical problems that in the prior art, the purification method of the muddy water is high in cost and low in efficiency; the muddy water, which very easily causes environmental pollution, is discharged into construction sites, municipal rainwater pipelines positioned beside the construction sites or sewer pipelines, so that the rainwater pipelines or rivers where the muddy water is discharged can be blocked. The purification method comprises the steps of separating large particles of suspended matters in muddy raw water by using a grate, and adding right amount of the prepared flocculating agent into the muddy raw water, wherein the flocculating agent is prepared by fully stirring and mixing divalent ionic type salt solid and anionic macromolecule organic solid powder, the divalent ionic type salt solid is a mixture of calcium salts and iron salts, and the adding amount of the flocculating agent is 1 / 1000-1 / 100 of the dry base amount of mud; fully stirring and mixing; then, enabling the obtained mixture to enter a sedimentation tank for carrying out precipitation, directly discharging precipitated supernatant, dewatering the precipitated mud and then transporting the mud to the outside.

The present invention discloses method of dewatering concentrated bauxite, and features that during filtering and dewatering concentrated bauxite pulp, compound containing Ca2+ ion is added as the filter aid, with the filter aid adding amount being 0.5-5 wt% of solid concentrated bauxite. The method is simple and practical, and has high concentrated bauxite dewatering efficiency, concentrated bauxite filtering capacity 30-50 % raised, and no influence on the subsequent Bayer process production.

The invention discloses an emulsified waste liquid processing device capable of recovering resources. The device comprises a purifying portion, wherein the purifying portion is of a rectangular structure as a whole; a first medicine feeding portion is mounted on one side of the upper surface of the purifying portion through a bracket; a first medicine feeding tube is inserted in and fitted to theend surface of one side of the first medicine feeding portion; a first nozzle is mounted on one side of the interior of the purifying portion in a clamped manner; a first medicine delivery tube is mounted between the first medicine feeding portion and the first nozzle of the purifying portion in a penetrated manner; a first flow meter is embedded in the outer portion of the first medicine deliverytube; a first limiting block and a second limiting block are fixedly arranged on the inner wall of one side of the purifying portion; and a filter screen and a filter membrane are respectively mounted on one side of the purifying portion in a penetrated manner. By adopting the device, oil and water can be separated effectively and completely, the treatment effect is good, the long-term operationis stable, the demulsification efficiency is high, oil after demulsification can be recovered, and discharged water can be directly used in industry after the waste water is treated by flocculation sedimentation, the filter screen and a permeable membrane, thereby achieving resource recycling.

The invention relates to a water treatment agent for quick flocculating, and a preparation method and a water treatment method thereof. Firstly, the invention provides the water treatment agent for quick flocculating, which comprises an acrylamide oligomer / graphene oxide / ferroferric oxide compound, polyacrylamide, polysilicate aluminum ferrite, poly dimethyl diallyl ammonium chloride and sodium bicarbonate, wherein acrylamide oligomer grafted with graphene oxide is prepared by the following three steps of carboxylation of the graphene oxide, the preparation of carboxylic ferroferric oxide and composite reaction; the water treatment agent can realize quick flocculating assisted by a magnetic field, and adapts to various complex water qualities. Secondly, the invention provides the water treatment method, which comprises the following steps of mixing, preliminarily flocculating, secondarily flocculating and filtering; an underlying water refluxing step is adopted to realize the efficient utilization of the water treatment agent, so that the production cost is reduced.

The invention relates to the technical field of wastewater treatment, and discloses a chemical wastewater treatment tank which comprises a treatment tank body, a stirring frame is rotatably mounted on the inner wall of the treatment tank body, a transmission cavity is formed in the stirring frame, a transmission assembly is mounted in the transmission cavity, and an aeration assembly is fixedly mounted on the lower surface of the stirring frame. When a transmission shaft rotates, the transmission shaft drives a second straight gear to rotate, so that the second straight gear drives a first straight gear to rotate through a chain, a hollow shaft is driven to rotate, a spiral blade rotates under the action of the hollow shaft, and upward thrust is formed in sewage through rotation of the spiral blade such that particulate matters or floccules in sewage near the transmission shaft move upwards, the probability that the floccules and other matters block the aeration head in the hollow shaft is effectively reduced, and meanwhile, the spiral blades rotate to form rotary fluctuation in the sewage, so that the fusion of a flocculating agent and the particulate matters in the sewage is accelerated.

The invention discloses a multilayer heavy metal filter device which comprises a primary filter grid net, a secondary filter grid net, an inorganic polymer filter board located between the primary filter grid net and the secondary filter grid net, and a polymeric flocculation micro-pore plate located at the lower end of the inorganic polymer filter board, wherein the primary filter grid net is connected with the secondary filter grid net through a thread groove; and the polymeric flocculation micro-pore plate is located between the inorganic polymer filter board and the secondary filter grid net. The multilayer heavy metal filter device is good in filter effect and high in heavy metal retention rate, the flocculation efficiency is improved, and meanwhile, the flocculation effect is ensured.

The invention discloses a grille-type flocculating settling device and a construction method thereof. The grille-type flocculating settling device comprises a setting tank; a flocculating unit is arranged at the center of the settling tank; the top of the settling tank is externally connected with an overflow water collecting tank; the flocculating unit comprises a water distributing funnel, a water distributing grille and a flocculating grille; the water distributing funnel, the water distributing grille and the flocculating grille are connected in series from top to bottom. The device utilizes small-diameter grids to enhance small eddy generation so as to benefit collision flocculation of particles; meanwhile, by continuously regulating a distance between the grids, a velocity gradient of water flow is gradually reduced, so that crushing of a flocculating constituent can be effectively avoided; by adopting the device to carry out flocculating settling, the large flocculating constituent can be rapidly formed in short time and settling separation is timely carried out, so that flocculating settling efficiency is effectively improved; when the device is utilized to replace a conventional concentrator for carrying out flocculating settling of slime water, an occupied area of equipment can be reduced and investment and operation cost can be reduced.

The invention discloses a macromolecular heavy metal flocculating device, which comprises a filter plate, a primary fixed aluminum plate, a primary heavy metal flocculating plate, a secondary fixed aluminum plate and a secondary heavy metal flocculating plate, wherein the primary fixed aluminum plate and the secondary fixed aluminum plate are I-shaped, and are butted to form a cavity; the primary heavy metal flocculating plate is arranged in the cavity; the filter plate is arranged in a groove in the upper end of the primary fixed aluminum plate; a secondary heavy metal flocculating agent is arranged in a groove in the lower end of the secondary fixed aluminum plate; the centers of the primary fixed aluminum plate and the secondary fixed aluminum plate are both provided with slant grid plates; a stainless steel filter plate is adopted by the filter plate; micro-porous heavy metal flocculating plates are adopted by the primary heavy metal flocculating plate and the secondary heavy metal flocculating plate. The macromolecular heavy metal flocculating device provided by the invention has an excellent flocculation effect, a good filtration effect and excellent stability.

The invention discloses a feeding box for a thickener and a using method of the feeding box. The feeding box comprises a feeding barrel, a feeding pipe and a flocculating agent adding pipe inserted into the feeding barrel; wherein the feeding barrel is divided into a feeding dilution area, a flocculation mixing area and a floccule discharging area from top to bottom; the feeding pipe is arranged on the feeding barrel of the feeding dilution area in a communicating manner along the tangential direction; an annular flow guide plate and a plurality of energy dissipation vertical plates are arranged in the feeding barrel of the flocculation mixing area from top to bottom, a plurality of adding holes are formed in the flocculant adding pipe between the annular flow guide plate and the energy dissipation vertical plates, a convergent material guide section is arranged at the bottom of the feeding barrel, and an opening in the bottom of the material guide section is formed in the floccule discharging area. The feeding pipe is arranged in the feeding dilution area of the feeding barrel, the adding holes are formed in a flocculation mixing area of the feeding barrel, the annular flow guideplate is arranged in the feeding dilution area and the flocculation mixing area to achieve the blocking effect, tailing raw stock dilution and flocculation reaction are completed in a segmented mode,and dilution and flocculation reaction processes are not overlapped; dilution and flocculation reactions are not crossed.

The invention discloses a sewage settling tank, comprising a tank body; a mixing barrel, which has a conical tubular structure and is provided with an opening at the lower end, is arranged at the central axis position of the tank body, and a vertical water outlet pipe is arranged at the central axis position of the mixing barrel; a mixing plate is arranged at the upper end of the vertical water outlet pipe, and is fixedly connected with a center shaft; the center shaft is fixedly connected with liquid outlet pipes which are distributed along the circumference and are communicated with the center shaft. By arranging the vertical water outlet pipe and the liquid outlet pipes, which are arranged opposite to each other, as well as the mixing barrel having the conical tubular structure, the mixing plate and the rotating center shaft, swirling flow is formed under the stirring of the mixing plate during head-on collision and mixing of a precipitant and sewage, so that the efficiency of flocculating precipitation is increased, the volumes of precipitate flocculation blocks are enlarged, and the generation of subsequent precipitate is facilitated; by arranging a vertical helical blade roller and a horizontal helical blade roller which are linked with each other, the sludge can be discharged outside, and a sludge discharge pipe is prevented from being blocked.

The invention discloses an integrated environmental protection treatment system for shield slag, belongs to the technical field of shield construction, and solves the problem of unsatisfactory treatment and recovery effect of shield slag in the prior art. Screening, sand washing, swirling, sand washing again, flocculation, pressure filtration, flocculation, etc., to obtain coarse sand, fine sand, mud cake and water, meet the requirements of material reuse and outbound transportation, and realize the reduction of shield muck It has the characteristics of integrated layout, modular installation, industrial production and intelligent control; the present invention has strong adaptability, and the system has multi-level configuration, multi-level accessories and various layout forms. It can meet the requirements of different projects on processing capacity, processing capacity, site layout and geological conditions.

The invention discloses a multilayer heavy metal filter device which comprises a primary filter grid net, a secondary filter grid net, an inorganic polymer filter board located between the primary filter grid net and the secondary filter grid net, and a polymeric flocculation micro-pore plate located at the lower end of the inorganic polymer filter board, wherein the primary filter grid net is connected with the secondary filter grid net through a thread groove; and the polymeric flocculation micro-pore plate is located between the inorganic polymer filter board and the secondary filter grid net. The multilayer heavy metal filter device is good in filter effect and high in heavy metal retention rate, the flocculation efficiency is improved, and meanwhile, the flocculation effect is ensured.

The invention discloses a grille-type flocculating settling device and a construction method thereof. The grille-type flocculating settling device comprises a setting tank; a flocculating unit is arranged at the center of the settling tank; the top of the settling tank is externally connected with an overflow water collecting tank; the flocculating unit comprises a water distributing funnel, a water distributing grille and a flocculating grille; the water distributing funnel, the water distributing grille and the flocculating grille are connected in series from top to bottom. The device utilizes small-diameter grids to enhance small eddy generation so as to benefit collision flocculation of particles; meanwhile, by continuously regulating a distance between the grids, a velocity gradient of water flow is gradually reduced, so that crushing of a flocculating constituent can be effectively avoided; by adopting the device to carry out flocculating settling, the large flocculating constituent can be rapidly formed in short time and settling separation is timely carried out, so that flocculating settling efficiency is effectively improved; when the device is utilized to replace a conventional concentrator for carrying out flocculating settling of slime water, an occupied area of equipment can be reduced and investment and operation cost can be reduced.

The invention provides a down-flow type fluidized bed flocculating settling device. The down-flow type fluidized bed flocculating settling device comprises a flocculating unit, a settling tank and anoverflow water collecting tank, wherein the flocculating unit is arranged at the center of the settling tank; the top part of the settling tank is externally connected with the overflow water collecting tank; the flocculating unit comprises a water distribution funnel, a water distribution grid and a down-flow type fluidized flocculating reaction bed which are sequentially arranged in series fromtop to bottom; the water flow in the down-flow type fluidized flocculating reaction bed flows from top to bottom; the particles of which the densities are different and are lower than the density of water are mixed and arranged in the bed layer. The down-flow type fluidized bed flocculating settling device has the advantages that in the flocculating settling process, the eddy required by the flocculating can be provided by the mixed and arranged low-density particles, the water flow speed gradient can be adjusted, and the floccule can quickly grow; because the settling directions of the waterflow and the particles are uniform, the easiness in mixing return of the floccule particles is avoided, the shearing and crushing of the fluid on the floccule can be effectively reduced, the flocculecan timely settle after penetrating through the bed layer, and the settling efficiency is improved.

The invention relates to an environment-friendly water treatment agent, a preparing method thereof and a water treatment method. The environment-friendly water treatment agent comprises acrylamide oligomer / oxidized graphene / ferroferric oxide compounds, zinc modified polyacrylamide, polysilicate aluminum ferrite and sodium bicarbonate. A preparing method in which oxidized graphene is grafted on acrylamide oligomers includes the three steps of carboxylation of the oxidized graphene, preparing of carboxylation ferroferric oxide and composite reacting. By means of the water treatment agent, magnetic-field-assisting rapid flocculation and efficient recycling can be achieved; meanwhile, as the zinc modified polyacrylamide is adopted, the decomposition time of the polyacrylamide is effectively shortened, and the requirement for the environment-friendly performance is met. The water treatment method includes the steps of mixing, primary flocculation, secondary flocculation and filtering. The water treatment agent is efficiently used through a lower-layer-water backflow step, and the production cost is reduced.

The invention relates to a multi-effect water treatment agent, a preparation method thereof and a water treatment method. The multi-effect water treatment agent is prepared from acrylamide oligomer grafting graphene oxide, polyacrylamide, polysilicate aluminum ferrite, poly(diallyl dimethyl ammonium chloride) and sodium bicarbonate, wherein the acrylamide oligomer grafting graphene oxide is prepared by two steps of graphene oxide carboxylation and grafting reaction. The multiple-effect water treatment agent can adapt to multiple complex water qualities, and particularly can effectively remove benzene compounds and heavy metal ions. The water treatment method comprises stages of mixing, preliminary flocculation, secondary flocculation and filtering; the efficient utilization of the water treatment agent is realized by using a lower water backflow step, and the production cost is lowered.

The invention relates to the technical field of sewage floating object purification, in particular to a sewage floating object treatment device based on flocculent precipitation. The device comprisesa settling area, at least three cylindrical sludge chambers are formed in the bottom of the settling area, a driving shaft, a first driven shaft and a second driven shaft are fixedly installed in thethree sludge chambers respectively, a first belt wheel is fixedly installed at one end of the first driven shaft, and a second belt wheel is fixedly installed at one end of the second driven shaft; and a conveying motor is coaxially connected to the driving shaft, sealing pieces are fixedly mounted at openings in one ends of the sludge chambers, at least three sealing plugs are arranged in the sealing pieces, the three sealing plugs are fixedly connected through connecting rods, and a plurality of mounting holes are formed in the surfaces of the side walls of the connecting rods. Through arrangement of stirring blades, the stirring blades facilitate flocculation and feeding, and meanwhile, the mixing of a flocculating agent and floating particles can be accelerated through the stirring ofthe stirring blades, so that the flocculation and sedimentation efficiency of sewage floating objects is effectively improved.

The invention relates to a water treatment agent for quick flocculating, and a preparation method and a water treatment method thereof. Firstly, the invention provides the water treatment agent for quick flocculating, which comprises an acrylamide oligomer / graphene oxide / ferroferric oxide compound, polyacrylamide, polysilicate aluminum ferrite, poly dimethyl diallyl ammonium chloride and sodium bicarbonate, wherein acrylamide oligomer grafted with graphene oxide is prepared by the following three steps of carboxylation of the graphene oxide, the preparation of carboxylic ferroferric oxide and composite reaction; the water treatment agent can realize quick flocculating assisted by a magnetic field, and adapts to various complex water qualities. Secondly, the invention provides the water treatment method, which comprises the following steps of mixing, preliminarily flocculating, secondarily flocculating and filtering; an underlying water refluxing step is adopted to realize the efficient utilization of the water treatment agent, so that the production cost is reduced.

The invention relates to the technical field of wastewater treatment, and discloses a chemical wastewater treatment pool, including a treatment pool. The inner wall of the treatment pool is rotatably installed with a stirring frame, and a transmission cavity is opened inside the stirring frame, and a transmission assembly is installed in the transmission cavity. An aeration assembly is fixedly installed on the lower surface of the frame. When the present invention rotates through the transmission shaft, the transmission shaft drives the spur gear 2 to rotate, and then the spur gear 2 drives the spur gear 1 to rotate through the chain, thereby driving the hollow shaft to rotate, so that the helical blade rotates under the action of the hollow shaft. Rotate, so that the upward thrust is formed in the sewage through the rotation of the helical blade, so that the particulate matter or flocs in the sewage near the transmission shaft move upwards, effectively reducing the clogging of the aeration head in the hollow shaft by flocs and other substances At the same time, the rotation of the helical blade forms a rotating wave in the sewage, which accelerates the fusion of the flocculant and the particulate matter in the sewage.

The present invention provides a method for preparing high-effective algae flocculant from non-toxic, easy-to-bio-degrade, cheap, natural macromolecular polymer modified clay. Said modification can obviously raise flocculation algae-removing capability of different clay, the algae-removing rate of various clays can be 20-95% Said high-effective algae flocculant can be used for controlling and treating large area red tide, fresh water algal bloom, and also can be used for removing harmful algae in river and drinking water plant.

A method for concentrating high-concentration brine, comprising the following steps: using a circulating high-efficiency precipitation zone, a circulating ultrafiltration zone, a nanofiltration zone, and a high-salt reverse osmosis zone for treatment; it is suitable for the treatment of concentrated brine with a salt content of 1% to 5%; The treated water enters the circulating high-efficiency sedimentation zone, and is stirred and mixed evenly by the agitator in the circulating high-efficiency sedimentation zone. The temporary hardness ions are removed by adding lime. The dosage of lime is added according to the temporary hardness of the influent water to be treated; When entering the circulating ultrafiltration, the product water is filtered through the membrane pores, and the suspended solid particles remain in the reflux liquid; the nanofiltration area adopts a double-circulation operation mode, and part of the concentrated water is returned to the circulating high-efficiency precipitation area for further precipitation; part of the concentrated water is returned to the nanofiltration area. The water enters the filter area, and the water produced in the nanofiltration area enters the high-salt reverse osmosis area to be concentrated by the reverse osmosis membrane, and further desalted through the high-salt reverse osmosis.