Method and system for wastewater treatment

Abstract

The present application relates to the technical field of water treatment, and discloses a sewage treatment method and system, the sewage treatment method comprising a flocculation stage and a screening stage. Specifically, the flocculation stage comprises adding a silicon fiber substrate, a coagulant and a flocculant into sewage, the coagulant, the flocculant and pollutants in the sewage flocculate on the periphery of the silicon fiber substrate to form oversized flocs. The screening stage comprises screening and intercepting the oversized flocs by using a screen, and the water flows to the next process. The sewage treatment method and system provided by the present application save the amount of coagulant and flocculant, do not need to build a sedimentation tank, reduce the construction cost, and save the construction area.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of water treatment, and particularly relates to a sewage treatment method and system. BACKGROUND

[0002] At present, a method of flocculation-sedimentation-filtration is usually used in a drinking water and sewage project, and a dissolved pollutant is converted into a difficultly soluble or insoluble precipitate through a chemical reaction, and then separated from water.

[0003] Among them, gravity sedimentation of the flocculation is a basis for realizing solid-liquid separation, and a flocculation sedimentation process highly depends on a size and a density of a flocculation. Therefore, in the related art, sewage treatment greatly depends on a coagulant and a flocculant which are high in price and cannot be reused, and is high in cost. In addition, limited by the size of the flocculation, in the related art, a sedimentation tank is usually arranged to realize flocculation sedimentation, and then filtration of the flocculation is performed.

[0004] However, the sedimentation tank is a landmark building of the water treatment project, and a civil engineering quantity is large, which not only occupies a large construction space, but also greatly increases construction cost.

[0005] Therefore, the sewage treatment method in the related art has problems of high cost and large land occupation. SUMMARY

[0006] Therefore, the present application provides a sewage treatment method and system to solve the problems of large land occupation and high cost of sewage treatment in the prior art.

[0007] In a first aspect, the present application provides a sewage treatment method, which comprises a flocculation stage and a screening stage. Specifically, the flocculation stage is to add a silicon fiber substrate, a coagulant and a flocculant into sewage, and the coagulant, the flocculant and pollutants in the sewage are flocculated on the periphery of the silicon fiber substrate to form oversized flocculation. Specifically, the screening stage is to screen and intercept the oversized flocculation by using a screen, and water flows to a next process.

[0008] Beneficial effects: in the flocculation stage, by adding the silicon fiber matrix and the coagulant into the sewage, the silicon fiber matrix can form a multi-nucleus high molecular flocculant with the coagulant, and the multi-nucleus high molecular flocculant has both the electric neutralization effect of the inorganic high molecular flocculant and the sweeping and trapping effect of the organic high molecular flocculant, so that the flocculation effect can be strengthened; meanwhile, the flocculant is added into the sewage, and the added flocculant can further play the roles of adsorption, wrapping and bridging, so that the sewage is subjected to flocculation reaction under the joint action of the silicon fiber matrix, the coagulant and the flocculant to generate the oversized flocculation product. First, the silicon fiber matrix of the present scheme can form a multi-nucleus high molecular flocculant with the coagulant and further strengthen the flocculation effect in cooperation with the flocculant. Under the participation of the silicon fiber matrix, the dosages of the coagulant and the flocculant are greatly reduced, thereby reducing the sewage treatment cost. Second, the size of the oversized flocculation product obtained through the flocculation stage of the present scheme is much larger than that of the conventional flocculation product, so that the oversized flocculation product can be separated by screening through a screen mesh, without the need to build a sedimentation tank, thereby greatly reducing the construction cost and saving the construction area.

[0009] In an alternative embodiment, in the step of the flocculation stage, the size of the oversized flocculation product is greater than 5000 μm.

[0010] Beneficial effects: the size of the conventional flocculation product is only about 500±50 μm, while the size of the oversized flocculation product obtained through the present scheme is greater than 5000 μm, and the weight and size of the oversized flocculation product are much larger than those of the conventional flocculation product, so that the oversized flocculation product is easy to separate from water. In addition, the oversized flocculation product obtained through the present scheme can be screened through a 5000 μm screen mesh, and the material is easy to obtain and simple and convenient.

[0011] In an alternative embodiment, the silicon fiber matrix comprises a fiber body and a polymerized silicon, and the polymerized silicon is polymerized at the end of the fiber body.

[0012] Beneficial effects: in the present scheme, the polymerized silicon is grafted at the end of the fiber body through hydrogen bonding and interaction, and the generated silicon fiber matrix has high chemical stability and is not easy to lose activity, thereby ensuring the reliability of the cooperative action with the coagulant and the flocculant.

[0013] In an alternative embodiment, the fiber body is configured in a flocculation cluster shape, and the fiber body extends outwardly with a plurality of ends; the number of the polymerized silicon is a plurality, and the plurality of polymerized silicon are polymerized at the plurality of ends of the fiber body.

[0014] Beneficial effects: in the present scheme, the fiber body configured in a flocculation cluster shape can increase the number of the peripheral polymerized silicon, and the plurality of polymerized silicon are polymerized at the ends of the flocculation cluster-shaped fiber body, so that the generated silicon fiber matrix has porosity, the specific surface area is significantly increased, and the volume of the oversized flocculation cluster is further increased.

[0015] In an alternative embodiment, the sewage treatment method further comprises a preparation stage of the silicon fiber matrix, the preparation stage comprising: dispersing the fiber body into a mixed solvent, specifically, dispersing 50 milliliters of mixed solvent per gram of fiber body, the mixed solvent being a mixture of water and ethanol, the ratio of water to ethanol being 1:4; adding reagents and catalysts, after stirring and mixing, a suspension of the silicon fiber matrix is generated, specifically, the reagents are tetraethoxysilane with a concentration of 98%, and the catalyst is phosphotungstic acid, 25-35 milliliters of tetraethoxysilane are added per gram of fiber body; 50-80 milligrams of phosphotungstic acid are added per gram of fiber body; the silicon fiber matrix is separated by gravity separation; after washing the silicon fiber matrix with deionized water, drying treatment is performed.

[0016] Beneficial effects: The present scheme can produce a silicon fiber matrix with high reliability and high purity.

[0017] In an alternative embodiment, before the step of dispersing the fiber body into the mixed solvent, the preparation stage further comprises a pretreatment step: after washing the fiber body with deionized water, drying treatment is performed; after washing the fiber body with an ethanol solution with a concentration of 70%, drying treatment is performed.

[0018] Beneficial effects: In this step, impurities in the fiber body can be effectively removed, improving the purity of the fiber body and avoiding the introduction of impurities during polymerization, thereby reducing the flocculation of the silicon fiber matrix.

[0019] In an alternative embodiment, in the step of the flocculation stage, a feeding step is included: introducing sewage into the flocculation chamber and stirring; adding the silicon fiber matrix into the flocculation chamber and stirring; adding the coagulant into the flocculation chamber and stirring; adding the flocculating agent into the flocculation chamber. Specifically, in the feeding step, the stirring time ranges from 2 to 5 minutes, and the stirring speed ranges from 150 to 320 revolutions per minute.

[0020] Beneficial effects: In the present scheme, the silicon fiber matrix is first added to the sewage, followed by the addition of the coagulant, and stirring is accompanied, which allows the silicon fiber matrix to quickly mix with the coagulant, facilitating the formation of a multi-core polymer flocculating agent. At this time, the flocculating agent is added, and stirring is accompanied, and under the bridging action of the flocculating agent, the pollutants in the sewage are flocculated on the periphery of the multi-core polymer flocculating agent, ultimately forming a super-size floc.

[0021] In an alternative embodiment, in the step of the flocculation stage, a reaction step is further included: stirring in the flocculation chamber, and the silicon fiber matrix, the coagulant, the flocculating agent, and the pollutants in the sewage undergo flocculation reaction; wherein, in the reaction step, the stirring time ranges from 4 to 6 minutes, and the stirring speed ranges from 150 to 200 revolutions per minute.

[0022] Beneficial effects: After the addition of the silicon fiber matrix, coagulant and flocculant, stirring is carried out in the flocculation chamber at a stirring speed of 150-200 rpm, so as to facilitate the full contact between the pollutants in the sewage and the reagents and the occurrence of flocculation reaction, so as to ensure the treatment effect of the sewage and improve the water quality.

[0023] In an alternative embodiment, the step of the flocculation stage further comprises a reagent supplementing step: acquiring turbidity information in the flocculation chamber in real time; determining reagent supplementing information of the silicon fiber matrix, coagulant and flocculant according to the turbidity information; and supplementing the reagents according to the reagent supplementing information.

[0024] Beneficial effects: It should be noted that sewage treatment is usually continuous operation, and in order to ensure that the flocculation reaction in the flocculation chamber can be continuously carried out, it is necessary to supplement an appropriate amount of silicon fiber matrix, or coagulant, or flocculant in the flocculation chamber. The reagent supplementing information in the present application specifically refers to the amount of silicon fiber matrix, or coagulant, or flocculant that needs to be supplemented. The present application can accurately understand the flocculation state in the flocculation chamber by monitoring the turbidity information in the flocculation chamber in real time, and accurately supplement the reagents, so as to avoid insufficient flocculation reaction or damage of oversized flocs, and further ensure the treatment effect of the sewage.

[0025] In an alternative embodiment, after the step of the screening stage, the sewage treatment method further comprises a collecting stage: collecting the oversized flocs intercepted by screening; a separating stage: separating the silicon fiber matrix in the oversized flocs; and a recycling stage: recycling and reusing the separated silicon fiber matrix.

[0026] Beneficial effects: In the present application, the silicon fiber matrix in the formed oversized flocs can be recycled and reused by collecting, separating and recycling, which not only reduces the amount of reagent input and production cost, but also reduces the content of reagents in sludge, reduces the toxicity of sludge, improves the quality of sludge, and meets the demand of sludge resource utilization.

[0027] In a second aspect, the present application also provides a sewage treatment system applied to the sewage treatment method of any one of the above embodiments, which comprises a flocculation mechanism and a screening mechanism. Specifically, the flocculation mechanism has a flocculation chamber, and the flocculation chamber is provided with a first water inlet and a first water outlet, and the first water inlet and the first water outlet are in communication with the chamber of the flocculation chamber. Further, the screening mechanism comprises a screen, which is arranged in the chamber of the flocculation chamber and is arranged adjacent to the first water outlet.

[0028] Beneficial effects: In the present application, the screen is arranged in the flocculation chamber of the flocculation mechanism, and the screen can screen and intercept the oversized flocs generated by flocculation, without the need to build a sedimentation tank, which greatly reduces the construction cost and saves the construction area.

[0029] In an alternative embodiment, the screening mechanism further comprises a rotating assembly, the screen is configured as a ring structure and is arranged on the rotating assembly, and the rotating assembly is adapted to drive the screen to rotate around the circumference of the screen. Further, the screening mechanism further comprises a flushing assembly, the flushing assembly comprises a flushing pipe and a plurality of nozzles, and the plurality of nozzles are connected to the flushing pipe. Specifically, the plurality of nozzles are arranged at intervals on the inner side of the screen and face the screen.

[0030] Beneficial effects: In actual use, the silicon fiber matrix and the oversized flocs formed with the water flow pass through the screen and are intercepted by the screen. In this scheme, under the driving of the rotating assembly, the screen rotates around the circumference of the screen, and at the same time, the oversized flocs and the silicon fiber matrix attached to the screen are moved, avoiding the screen from being blocked and hindering the water flow out of the flocculation chamber after the sewage treatment. Further, the plurality of nozzles of the flushing assembly flush the screen inside the screen, further ensuring the filtering effect of the screen.

[0031] In an alternative embodiment, the screening mechanism further comprises a collecting hopper, the collecting hopper has an expanded neck portion and a contracted neck portion, the expanded neck portion is arranged at the bottom of the screen and is adjacent to the side of the screen away from the first water outlet, and the contracted neck portion is connected to the outside of the flocculation chamber.

[0032] Beneficial effects: In this scheme, the screen rotates around the circumference of the screen and moves the silicon fiber matrix and the oversized flocs, so that the silicon fiber matrix and the oversized flocs fall off the screen. The expanded neck portion of the collecting hopper receives the falling silicon fiber matrix and oversized flocs at the bottom of the screen and transmits them to the outside of the flocculation chamber through the contracted neck portion. The structure is simple and has high reliability.

[0033] In an alternative embodiment, the sewage treatment system further comprises a matrix separation mechanism, specifically, the matrix separation mechanism comprises a separation chamber, a sludge chamber at the bottom of the separation chamber, and a first sieve plate arranged between the separation chamber and the sludge chamber. The separation chamber is provided with a plurality of friction balls, and the contracted neck portion is connected to the separation chamber.

[0034] Beneficial effects: The silicon fiber matrix and the oversized flocs collected by the collecting hopper fall into the matrix separation mechanism through the contracted neck portion. The friction balls in the separation chamber can rub the oversized flocs to strip the flocculating material on the surface of the oversized flocs, obtaining the silicon fiber matrix. The stripped flocculating material and the sludge fall into the sludge chamber through the first sieve plate, realizing the separation from the silicon fiber matrix, facilitating the recycling of the silicon fiber matrix, and reducing the toxicity of the sludge.

[0035] In an alternative embodiment, the substrate separation mechanism further comprises a second sieve plate, which is arranged in the separation chamber and divides the separation chamber into a first separation chamber and a second separation chamber. Specifically, one end of the second sieve plate is connected to the top of the first sieve plate, and the other end extends towards the necking portion; the second sieve plate is adapted to swing between the two ends of the necking portion in the radial direction, so as to make the first separation chamber communicate with the necking portion, or make the second separation chamber communicate with the necking portion.

[0036] Beneficial effects: In this scheme, the second sieve plate divides the separation chamber into the first separation chamber and the second separation chamber, and the first separation chamber and the second separation chamber can be used as backup for each other. When the second sieve plate swings to one end of the necking portion in the radial direction, the first separation chamber communicates with the necking portion, and the oversized floc is separated in the first separation chamber, while water can pass through the second sieve plate into the second separation chamber and flow out of the second separation chamber. When the second sieve plate swings to the other end of the necking portion in the radial direction, the second separation chamber communicates with the necking portion, and the oversized floc is separated in the second separation chamber, while water can pass through the second sieve plate into the first separation chamber and flow out of the first separation chamber. In this way, the direction of water flow through the second sieve plate can be changed, ensuring the permeability of the second sieve plate and preventing it from being clogged.

[0037] In an alternative embodiment, the substrate separation mechanism further comprises at least two partitions, which are connected between the necking portion and the second sieve plate, and are arranged on the two sides of the necking portion in the radial direction, respectively. When the second sieve plate is connected to one of the partitions, the first separation chamber communicates with the necking portion; when the second sieve plate is connected to the other partition, the second separation chamber communicates with the necking portion.

[0038] Beneficial effects: The arrangement of the partitions can ensure the filtering effect of the second sieve plate and prevent the oversized floc from flowing out of the gap between the necking portion and the second sieve plate.

[0039] In an alternative embodiment, the side wall of the separation chamber is provided with a plurality of recovery holes, the size of the recovery holes is greater than the size of the silicon fiber substrate and smaller than the size of the oversized floc.

[0040] Beneficial effects: In this way, the separated silicon fiber substrate can be recovered through the recovery holes, while the oversized floc remains in the separation chamber, facilitating the recycling and reuse of the silicon fiber substrate. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the description of the specific embodiments or the prior art. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0042] Figure 1 A structure diagram of a silicon fiber matrix according to an embodiment of the present application;

[0043] Figure 2 A structure diagram of an oversized flocculation body according to an embodiment of the present application;

[0044] Figure 3 A structure diagram of a sewage treatment system according to an embodiment of the present application;

[0045] Figure 4 A structure diagram of a sewage treatment system according to an embodiment of the present application;

[0046] Figure 5 Another structure diagram of a sewage treatment system according to an embodiment of the present application.

[0047] Explanation of reference numerals:

[0048] 1, silicon fiber matrix; 11, fiber body; 12, polymerized silicon; 2, oversized flocculation body; 21, pollutant; 3, coagulant; 4, flocculant;

[0049] 5, flocculation mechanism; 51, flocculation chamber; 511, first water inlet; 512, first water outlet; 52, first driving member; 53, first agitator; 54, turbidity sensor;

[0050] 6, screening mechanism; 61, screen; 62, rotating assembly; 63, flushing assembly; 631, flushing pipe; 632, nozzle; 64, collection hopper; 641, expanded neck portion; 642, contracted neck portion;

[0051] 7, matrix separation mechanism; 71, separation chamber; 711, first separation chamber; 712, second separation chamber; 713, recovery hole; 714, second water outlet; 72, friction ball; 73, sludge chamber; 731, sludge discharge port; 74, first screen; 75, second screen; 76, second driving member; 77, second agitator. DETAILED DESCRIPTION

[0052] In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0053] Most of the drinking water and sewage projects use the method of "flocculation-sedimentation-filtration" to convert the dissolved pollutants into insoluble or insoluble precipitates through chemical reaction, and then separate them from the water. The gravity sedimentation of flocculation is the basis for realizing solid-liquid separation. The flocculation sedimentation process is highly dependent on the size and density of the flocculation. Therefore, it is largely dependent on the high-priced and non-reusable coagulant and flocculant. The coagulant and flocculant are used in large quantities and lost in the sludge, and their weight usually accounts for 30-50% of the dry weight of the sludge. On the one hand, the accumulation of metal-based coagulants and synthetic flocculants in the sludge increases the toxicity of the sludge, reduces the quality of the sludge, and causes great pressure on the resource utilization of the sludge; on the other hand, the sedimentation tank is almost a landmark structure of the water treatment project, and occupies the main construction space.

[0054] Based on this, the present application provides a sewage treatment method and system.

[0055] The embodiments of the present application will be described below with reference to the accompanying drawings Figures 1-5 The embodiments of the present application are described.

[0056] According to the embodiments of the present application, on the one hand, referring to Figures 1-5 The present application provides a sewage treatment method, which comprises a flocculation stage and a screening stage.

[0057] Specifically, the flocculation stage is to add a silicon fiber matrix 1, a coagulant 3 and a flocculant 4 into the sewage, the coagulant 3, the flocculant 4 and the pollutants 21 in the sewage are flocculated on the periphery of the silicon fiber matrix 1 to form a super-size flocculation 2.

[0058] Specifically, the screening stage is to screen and intercept the super-size flocculation 2 by using a screen 61, and the water flows to the next process.

[0059] In this embodiment, in the flocculation stage, by adding the silicon fiber matrix 1 and the coagulant 3 into the sewage, the silicon fiber matrix 1 can form a multi-core polymer flocculant with the coagulant 3, the formed multi-core polymer flocculant has both the electric neutralization effect of inorganic polymer flocculant and the sweeping and trapping effect of organic polymer flocculant, and can strengthen the flocculation effect; at the same time, the flocculant 4 is added into the sewage, the added flocculant 4 can further play the roles of adsorption, wrapping and bridging, so that under the joint action of the silicon fiber matrix 1, the coagulant 3 and the flocculant 4, the sewage occurs flocculation reaction to generate the super-size flocculation 2.

[0060] Firstly, the silicon fiber matrix 1 can form a multi-nuclear polymer flocculant with the coagulant 3 and can cooperate with the flocculant 4 to further strengthen the flocculation. Under the participation of the silicon fiber matrix 1, the dosages of the coagulant 3 and the flocculant 4 are greatly reduced, thereby reducing the cost of sewage treatment. Secondly, the size of the oversized flocculation body 2 obtained after the flocculation stage of the present scheme is much larger than the size of the conventional flocculation product, so that the oversized flocculation body 2 can be screened and intercepted by the screen 61, without the need to build a sedimentation tank, thereby greatly reducing the construction cost and saving the construction area.

[0061] In addition, in the embodiment, under the synergistic effect of the silicon fiber matrix 1, the coagulant 3 and the flocculant 4, the dosages of the coagulant 3 and the flocculant 4 are greatly reduced, and the content of the flocculant 4 and the coagulant 3 in the sludge can also be reduced, thereby reducing the toxicity of the sludge.

[0062] Specifically, in the step of the flocculation stage, the size of the oversized flocculation body 2 is greater than 5000 μm.

[0063] Generally, the size of the conventional flocculation product is only about 500±50 μm, while the size of the oversized flocculation body 2 obtained in the embodiment is greater than 5000 μm, and the weight and size of the oversized flocculation body 2 are much larger than those of the conventional flocculation product, so that the oversized flocculation body 2 is easy to be separated out in water.

[0064] In addition, the oversized flocculation body 2 obtained by the present scheme can be screened by the screen 61 with a size of 5000 μm, and the material is easy to obtain and simple and convenient.

[0065] Specifically, the size of the oversized flocculation body 2 obtained by the present scheme can reach 6000±500 μm, which is more than 12 times of the conventional flocculation product.

[0066] In some embodiments, referring to Figure 1 The silicon fiber matrix 1 includes a fiber body 11 and a polymerized silicon 12, and the polymerized silicon 12 is polymerized at the end of the fiber body 11.

[0067] The polysilicic acid (active silicic acid) has a high molecular weight and a long molecular chain, has a strong adsorption, sweeping, aggregation and bridging effect, and has a low cost, a simple polymerization method and a wide source, and is often used as a coagulation aid; however, the polysilicic acid is easy to form a silicic acid gel and lose activity, has poor performance stability and low application reliability. In the present embodiment, the polymerized silicon 12 is grafted at the end of the fiber body 11 through hydrogen bonding and interaction, and the generated silicon fiber matrix 1 has high chemical stability and is not easy to lose activity, thereby ensuring the reliability of the synergistic effect with the coagulant 3 and the flocculant 4.

[0068] The fiber body 11 can be made of various natural fibers and synthetic fibers, which are widely available, easy to obtain and low in cost. For example, the fiber body 11 can be made of cotton fibers with a diameter of 10-17 μm; for example, hemp fibers with a diameter of 10-40 μm can be used; for example, synthetic fibers such as polyester, polyamide, polyacrylonitrile, polypropylene, etc. with a diameter of 5-50 μm can also be used. It can be understood that the specific size and material of the fiber body 11 are not limited in the present application, as long as it can realize the function of polymerizing with the polymerized silicon 12 into the silicon fiber matrix 1.

[0069] In some embodiments, referring to Figure 1 , the fiber body 11 is configured in a fluffy shape, and the fiber body 11 extends outwardly with a plurality of end portions; the number of polymerized silicon 12 is a plurality, and the plurality of polymerized silicon 12 is respectively polymerized on the plurality of end portions of the fiber body 11.

[0070] In this embodiment, the fiber body 11 configured in a fluffy shape can increase the number of peripheral polymerized silicon 12, and the plurality of polymerized silicon 12 is polymerized on the end portions of the fluffy fiber body 11, so that the formed silicon fiber matrix 1 has porosity, significantly increases the specific surface area, and further increases the volume of the oversized fluffy body.

[0071] Specifically, the surface area of the formed silicon fiber matrix 1 can reach 280 m2 / g. Further, the length of the formed silicon fiber matrix 1 ranges from 280-2650 μm; in the formed silicon fiber matrix 1, the weight percentage of silicon is 5%-25%.

[0072] In some embodiments, the sewage treatment method further includes a preparation stage of the silicon fiber matrix 1, and the preparation stage includes:

[0073] The fiber body 11 is dispersed into a mixed solvent; specifically, 50 milliliters of mixed solvent are dispersed into each gram of fiber body 11, and the mixed solvent is a mixture of water and ethanol, and the ratio of water to ethanol is 1:4;

[0074] The reagent and catalyst are added, and after stirring and mixing, a suspension of the silicon fiber matrix 1 is generated; specifically, the reagent is tetraethoxysilane with a concentration of 98%, and the catalyst is phosphotungstic acid; 25-35 milliliters of tetraethoxysilane are added per gram of fiber body 11; 50-80 milligrams of phosphotungstic acid are added per gram of fiber body 11;

[0075] The silicon fiber matrix 1 is separated by gravity separation method; after the silicon fiber matrix 1 is washed with deionized water, drying treatment is performed.

[0076] In this embodiment, the reliability of preparing the silicon fiber matrix 1 is high, and the obtained silicon fiber matrix 1 has high purity.

[0077] The present application is to use phosphotungstic acid-cellulose hydrolysis mechanism to prepare the silicon fiber matrix 1. In this embodiment, the fiber body 11 is cellulose, which is a polysaccharide biological macromolecule and is the main component of wood, plant cell wall, cellulose fiber and other plant materials, and is widely available. Phosphotungstic acid has strong acidity and is an organic synthesis catalyst that can promote the hydrolysis reaction of the fiber body 11. The hydrogen ions in the water and the hydroxyl groups in the fiber body 11 undergo acid catalysis, and at the same time, tetraethoxysilane is introduced. Tetraethoxysilane can be hydrolyzed into silicic acid, which can be obtained by controlled polycondensation reaction to obtain polysilicic acid, and then introduce polymerized silicon 12 into the fiber body 11 to obtain the silicon fiber matrix 1.

[0078] In this embodiment, the obtained suspension of the silicon fiber matrix 1 can also be screened by the screen 61 to obtain the silicon fiber matrix 1.

[0079] In this embodiment, the obtained suspension of the silicon fiber matrix 1 can also be screened by the screen 61 to obtain the silicon fiber matrix 1.

[0080] Specifically, taking 1g of the fiber body 11 as an example, the operation steps for preparing the silicon fiber matrix 1 are as follows:

[0081] Mix 10ml of water and 40ml of ethanol to obtain a mixed solvent, and disperse 1g of the fiber body 11 into the mixed solvent;

[0082] Add 25-35ml of 98% concentration tetraethoxysilane and 50-80mg of phosphotungstic acid into the mixed solvent, and stir the mixture at room temperature for 24 hours at a stirring speed of 120-200rpm to obtain a suspension of 80-90wt% of the silicon fiber matrix 1;

[0083] Place the suspension of the silicon fiber matrix 1 in deionized water, and the silicon fiber matrix 1 is quickly precipitated at the bottom under the action of gravity;

[0084] After washing the silicon fiber matrix 1 with deionized water for 3 times, dry the silicon fiber matrix 1 in the air for 24 hours.

[0085] In some embodiments, before the step of dispersing the fiber body 11 into the mixed solvent, the preparation stage further comprises a pretreatment step:

[0086] After washing the fiber body 11 with deionized water, dry the fiber body 11;

[0087] After washing the fiber body 11 with 70% concentration ethanol solution, dry the fiber body 11.

[0088] In this step, the impurities in the fiber body 11 can be effectively removed, the purity of the fiber body 11 is improved, the introduction of impurities during polymerization is avoided, and the flocculation of the silicon fiber matrix 1 is reduced.

[0089] For example, after the fiber body 11 is washed with deionized water and ethanol in the pretreatment step, the fiber body 11 is dried in an environment of 30-40°C for 24 hours.

[0090] In some embodiments, the flocculation stage also includes a feeding step, namely:

[0091] The sewage is introduced into the flocculation chamber 51 and stirred;

[0092] The silicon fiber substrate 1 is added into the flocculation chamber 51 and stirred;

[0093] The coagulant 3 is added into the flocculation chamber 51 and stirred;

[0094] The flocculant 4 is added into the flocculation chamber 51.

[0095] Specifically, in the feeding step, the stirring time ranges from 2 to 5 minutes, and the stirring speed ranges from 150 to 320 rpm.

[0096] The silicon fiber substrate 1 is first added into the sewage, and then the coagulant 3 is added, and stirring is performed at the same time, so that the silicon fiber substrate 1 and the coagulant 3 are quickly mixed, which facilitates the formation of the multi-core polymer flocculant. At this time, the flocculant 4 is added, and stirring is performed at the same time. Under the bridging action of the flocculant 4, the pollutants 21 in the sewage are flocculated on the periphery of the multi-core polymer flocculant, and finally the oversized flocs 2 are formed.

[0097] For example, the coagulant 3 can be polyaluminum sulfate, and the flocculant 4 can be polyacrylamide. It can be understood that the coagulant 3 and the flocculant 4 in the present application can also be other components, as long as they can realize the function of cooperating with the silicon fiber substrate 1 to produce the oversized flocs 2.

[0098] In some embodiments, the flocculation stage also includes a reaction step, namely:

[0099] The silicon fiber substrate 1, the coagulant 3, the flocculant 4, and the pollutants 21 in the sewage perform a flocculation reaction in the flocculation chamber 51 under stirring.

[0100] In the reaction step, the stirring time ranges from 4 to 6 minutes, and the stirring speed ranges from 150 to 200 rpm.

[0101] After the silicon fiber substrate 1, the coagulant 3, and the flocculant 4 are added, stirring is performed in the flocculation chamber 51 at a stirring speed of 150-200 rpm, which facilitates the pollutants 21 in the sewage to fully contact with the reagents and occur flocculation reaction, so as to ensure the treatment effect of the sewage and improve the water quality.

[0102] In some embodiments, the flocculation stage further comprises a medicament supplementing step, namely:

[0103] Real-time turbidity information of the flocculation chamber 51 is obtained;

[0104] Medicament supplementing information of the silicon fiber substrate 1, the coagulant 3, and the flocculant 4 is determined according to the turbidity information;

[0105] Medicament supplementing is performed according to the medicament supplementing information.

[0106] It should be noted that sewage treatment is usually a continuous operation. In order to ensure that the flocculation reaction in the flocculation chamber 51 can be continuously carried out, it is necessary to supplement an appropriate amount of silicon fiber substrate 1, or coagulant 3, or flocculant 4 in the flocculation chamber 51.

[0107] The medicament supplementing information in this embodiment specifically refers to the amount of silicon fiber substrate 1, or coagulant 3, or flocculant 4 that needs to be supplemented and added. Through real-time monitoring of the turbidity information in the flocculation chamber 51, this embodiment can accurately understand the flocculation state in the flocculation chamber 51, and accurately supplement medicaments, so as to avoid insufficient flocculation reaction or damage of oversized flocs 2, and further ensure the treatment effect of sewage.

[0108] For example, an online turbidity sensor 54 can be arranged in the flocculation chamber 51 to facilitate real-time monitoring of the turbidity information in the flocculation chamber 51.

[0109] For example, a micro-scale dosing coagulation monitoring device (not shown in the figure) can also be arranged in the flocculation chamber 51. On the basis of online turbidity monitoring, the micro-scale dosing coagulation monitoring device can perform in-situ imaging analysis of the morphology of the coagulation chamber based on image recognition technology.

[0110] Specifically, the micro-scale dosing coagulation monitoring device performs image recognition, measurement and analysis on the generated oversized flocs 2, and cooperates with beaker tests for comparison, optimizes the dosing control parameters for the purpose of improving the effluent water quality of sewage treatment, and thus determines the medicament supplementing information.

[0111] In addition, on the basis of in-situ dynamic imaging analysis of the oversized flocs 2, the micro-scale dosing coagulation monitoring device can also establish a quantitative model of the characteristics of the oversized flocs 2 and the treatment effect, dynamically analyze the distribution of the floc morphology in the pool, and further provide a basis for the addition of medicaments, so as to realize lean operation of the sewage treatment process.

[0112] In some embodiments, after the step of the screening stage, the sewage treatment method further comprises:

[0113] The collection stage: collecting the oversized flocs 2 intercepted by the screening;

[0114] Separation stage: separating the silicon fiber matrix 1 in the oversized flocculation 2;

[0115] Recovery stage: recycling the separated silicon fiber matrix 1.

[0116] In this embodiment, the silicon fiber matrix 1 in the formed oversized flocculation 2 can be recycled by collection, separation and recovery, which not only reduces the amount of medicament input and production cost, but also reduces the content of medicament in sludge, reduces the toxicity of sludge, improves the quality of sludge, and meets the demand of sludge resource utilization.

[0117] For example, the oversized flocculation 2 intercepted on the screen 61 can be collected by a funnel, and the collected oversized flocculation 2 can be transmitted to the matrix separation mechanism 7 for separation of the silicon fiber matrix 1.

[0118] For example, a plurality of friction balls 72 can be arranged in the matrix separation mechanism 7, and the flocculation on the periphery of the silicon fiber matrix 1 can be stripped by mutual friction between the friction balls 72 and the oversized flocculation 2.

[0119] For example, a plurality of recovery openings can also be arranged on the matrix separation mechanism 7 to facilitate recovery of the stripped silicon fiber matrix 1.

[0120] In this embodiment, the recovery rate of the silicon fiber matrix 1 can reach more than 95%, and the recovered silicon fiber matrix 1 can be re-input into the flocculation chamber 51 for repeated use, thereby reducing the cost.

[0121] According to the embodiment of the present application, on the other hand, a sewage treatment system is also provided, which is applied to the above-mentioned sewage treatment method. Specifically, the sewage treatment system comprises a flocculation mechanism 5 and a screening mechanism 6.

[0122] Referring to Figure 3 The above-mentioned flocculation mechanism 5 has a flocculation chamber 51, which is provided with a first water inlet 511 and a first water outlet 512, and the first water inlet 511 and the first water outlet 512 are communicated with the cavity of the flocculation chamber 51.

[0123] Further, the above-mentioned screening mechanism 6 comprises a screen 61, which is arranged in the cavity of the flocculation chamber 51 and is arranged adjacent to the first water outlet 512.

[0124] In this embodiment, the screen 61 is arranged in the flocculation chamber 51 of the flocculation mechanism 5, which can screen and intercept the oversized flocculation 2 generated by flocculation, without the need to build a sedimentation tank, thereby greatly reducing the construction cost and saving the construction area.

[0125] It should be noted that the sewage treatment system provided by the present application can be used for continuous operation, and the first water inlet 511 is used for continuously injecting untreated sewage, and the first water outlet 512 is used for discharging water after flocculation treatment to enter the next process.

[0126] For example, the screen 61 can be configured as a sheet structure or a closed ring structure. For example, the screen 61 is arranged in the height direction of the flocculation chamber 51 or is arranged obliquely in the height direction of the flocculation chamber 51.

[0127] For example, the screen 61 is arranged in the flocculation chamber 51 close to one side of the first water outlet 512, and the screen 61 divides the flocculation chamber 51 into a first part and a second part, wherein the first water inlet 511 is located in the first part for flocculation reaction of sewage, and the first water outlet 512 is located in the second part, and the filtered water enters the second part through the screen 61 and flows out from the first water outlet 512.

[0128] For example, the flocculation chamber 51 is also provided with a feeding port (not shown in the figure) for feeding the coagulant 3, the flocculant 4 and the silicon fiber substrate 1.

[0129] For example, the flocculation mechanism 5 further comprises a first driving member 52 and a first stirrer 53, the first driving member 52 is drivingly connected with the first stirrer 53, the first stirrer 53 has a fan structure, the fan structure of the first stirrer 53 extends into the flocculation chamber 51, and the first driving member 52 is used for driving the fan structure to rotate to stir in the flocculation chamber 51.

[0130] For example, the first driving member 52 can be a driving motor, a pneumatic cylinder or a hydraulic cylinder, etc.

[0131] In some embodiments, referring to Figure 4 The screening mechanism 6 further comprises a rotating assembly 62, the screen 61 is configured as a ring structure and is arranged on the rotating assembly 62, and the rotating assembly 62 is adapted to drive the screen 61 to rotate around the circumference thereof.

[0132] Further, the screening mechanism 6 further comprises a flushing assembly 63, the flushing assembly 63 comprises a flushing pipe 631 and a plurality of nozzles 632, and the plurality of nozzles 632 are communicated with the flushing pipe 631.

[0133] Specifically, the plurality of nozzles 632 are arranged on the inner side of the screen 61 and are arranged towards the screen 61.

[0134] In actual use, the silicon fiber matrix 1 and the formed oversized flocs 2 pass through the screen 61 with the water flow, are intercepted by the screen 61, and are attached to the outer surface of the screen 61. Under the driving of the rotating assembly 62, the screen 61 rotates around the circumference of the screen 61, and the oversized flocs 2 and the silicon fiber matrix 1 attached to the screen 61 are moved, so as to avoid the screen 61 from being blocked and hindering the water flow out of the flocculation chamber 51 after the sewage treatment.

[0135] Further, the multiple spray heads 632 of the flushing assembly 63 flush the screen 61 inside the screen 61, further ensuring the filtering effect of the screen 61.

[0136] The specific structure of the rotating assembly 62 is not limited in the present application, as long as the function of rotating the screen 61 around the circumference of the screen 61 can be achieved. For example, the rotating assembly 62 can include a driving motor, a driving wheel, and a driven wheel. The screen 61 is tightly sleeved between the driving wheel and the driven wheel. The driving motor drives the driving wheel to rotate, thereby driving the driven wheel and the screen 61 to rotate.

[0137] For example, the flushing assembly 63 can use a fluid medium to flow through the flushing pipe 631 and be sprayed by the spray heads 632 to the screen 61, so as to realize the reverse flushing of the screen 61. The fluid medium can be compressed air, or water, or a gas-water mixture. In this way, compared with the backwashing of the particle filtering pool, the required amount of water is saved by 55%-80%.

[0138] For example, the multiple spray heads 632 are arranged inside the ring-shaped screen 61 and are arranged in two rows along the extension direction of the screen 61. The two rows of spray heads 632 flush the parts on both sides of the screen 61, so as to flush the oversized flocs 2 on the screen 61 and avoid the screen 61 from being blocked. Each row has multiple spray heads 632, and the multiple spray heads 632 are uniformly and spacedly arranged.

[0139] For example, the flushing pipe 631 extends from the outside of the flocculation chamber 51 to the inside of the screen 61, and the spray heads 632 arranged inside the screen 61 are all in communication with the flushing pipe 631, so that the flushing pipe 631 can pass the fluid medium for flushing into each spray head 632.

[0140] In some embodiments, referring to Figure 4 The screening mechanism 6 further includes a collecting hopper 64. The collecting hopper 64 has an expanding neck portion 641 and a narrowing neck portion 642. The expanding neck portion 641 is arranged adjacent to the side of the screen 61 away from the first water outlet 512. The narrowing neck portion 642 is in communication with the outside of the flocculation chamber 51.

[0141] In this embodiment, the screen 61 rotates around its circumferential direction, and drives the silicon fiber matrix 1 and the oversized flocculation 2 to move, so that the silicon fiber matrix 1 and the oversized flocculation 2 fall from the screen 61. The expanded neck portion 641 of the collecting bucket 64 receives the falling silicon fiber matrix 1 and the oversized flocculation 2 at the bottom of the screen 61, and transmits them to the outside of the flocculation chamber 51 through the constricted neck portion 642. The structure is simple and has high reliability.

[0142] For example, the collecting bucket 64 can be a funnel. For example, the expanded neck portion 641 abuts against one side of the bottom of the screen 61.

[0143] In some embodiments, referring to Figure 4 and Figure 5 , the sewage treatment system further comprises a matrix separation mechanism 7. Specifically, the matrix separation mechanism 7 comprises a separation chamber 71, a sludge chamber 73 located at the bottom of the separation chamber 71, and a first sieve plate 74 arranged between the separation chamber 71 and the sludge chamber 73. The separation chamber 71 is arranged with a plurality of friction balls 72, and the constricted neck portion 642 communicates with the separation chamber 71.

[0144] In this embodiment, the silicon fiber matrix 1 and the oversized flocculation 2 collected by the collecting bucket 64 fall into the matrix separation mechanism 7 through the constricted neck portion 642. The friction balls 72 in the separation chamber 71 can rub the oversized flocculation 2 to strip the flocculation on the surface of the oversized flocculation 2, so as to obtain the silicon fiber matrix 1. The stripped flocculation and sludge fall into the sludge chamber 73 through the first sieve plate 74, so as to realize the separation from the silicon fiber matrix 1, facilitate the recycling of the silicon fiber matrix 1, and reduce the toxicity in the sludge.

[0145] For example, the separation chamber 71 is further provided with a second driving member 76 and a second stirrer 77. The second driving member 76 is drivingly connected with the second stirrer 77. The second stirrer 77 has a fan structure, and the fan structure extends into the separation chamber 71. The second driving member 76 is used to drive the fan structure to rotate, so as to stir in the separation chamber 71, so that the friction balls 72 and the oversized flocculation 2 rub each other, and the stripping efficiency is improved.

[0146] For example, the second driving member 76 can be a driving motor, a pneumatic cylinder, or a hydraulic cylinder, etc.

[0147] For example, the longitudinal section of the first sieve plate 74 can be triangular.

[0148] For example, the bottom of the sludge chamber 73 further has a sludge discharge port 731, which facilitates the discharge of the sludge.

[0149] For example, the sewage treatment system further has a sludge dewatering mechanism, which is used to dewater the sludge discharged from the sludge discharge port 731, so as to facilitate the reuse of the sludge.

[0150] In some embodiments, referring toFigure 4 and Figure 5 The matrix separation mechanism 7 further comprises a second sieve plate 75, which is arranged in the separation chamber 71 and divides the separation chamber 71 into a first separation chamber 711 and a second separation chamber 712.

[0151] Specifically, one end of the second sieve plate 75 is connected to the top of the first sieve plate 74, and the other end extends towards the necked portion 642; the second sieve plate 75 is adapted to swing between the two ends of the necked portion 642 in the radial direction, so as to communicate the first separation chamber 711 with the necked portion 642 (as shown in Figure 4 ), or to communicate the second separation chamber 712 with the necked portion 642 (as shown in Figure 5 ).

[0152] In this embodiment, the second sieve plate 75 divides the separation chamber 71 into the first separation chamber 711 and the second separation chamber 712, which can be used as backup for each other. When the second sieve plate 75 swings to one end of the necked portion 642 in the radial direction, the first separation chamber 711 communicates with the necked portion 642, and the oversized flocs 2 are separated in the first separation chamber 711, while water can enter the second separation chamber 712 through the second sieve 61 and flow out of the second separation chamber 712. When the second sieve plate 75 swings to the other end of the necked portion 642 in the radial direction, the second separation chamber 712 communicates with the necked portion 642, and the oversized flocs 2 are separated in the second separation chamber 712, while water can enter the first separation chamber 711 through the second sieve 61 and flow out of the first separation chamber 711. In this way, the direction of water flow through the second sieve plate 75 can be changed, ensuring the permeability of the pores of the second sieve plate 75 and preventing it from being clogged.

[0153] For example, the sewage treatment system further comprises a control unit, which can control the swinging of the second sieve plate 75, change the position of the second sieve plate 75 at regular intervals, and switch the necked portion 642 to communicate with the first separation chamber 711 or the second separation chamber 712.

[0154] For example, the second sieve plate 75 can be configured as a flat plate structure.

[0155] For example, the separation chamber 71 has a ball drop opening (not shown in the figure), and the necked portion 642 communicates with the separation chamber 71 through the ball drop opening. For example, the ball drop opening and the second sieve plate 75 are both located in the middle of the separation chamber 71.

[0156] For example, the number of the second driving members 76 and the second stirrers 77 is both two, which are arranged in the first separation chamber 711 and the second separation chamber 712, respectively. For example, a plurality of friction balls 72 are arranged in the first separation chamber 711 and the second separation chamber 712.

[0157] In some embodiments, the substrate separation mechanism 7 further comprises at least two partitions (not shown in the figure) connected between the necked portion 642 and the second sieve plate 75, and arranged on two sides of the necked portion 642 respectively. When the second sieve plate 75 is connected with one of the partitions, the first separation chamber 711 is in communication with the necked portion 642; when the second sieve plate 75 is connected with the other partition, the second separation chamber 712 is in communication with the necked portion 642. The arrangement of the partitions can ensure the filtering effect of the second sieve plate 75, and avoid the oversized floc 2 from flowing out from the gap between the necked portion 642 and the second sieve plate 75.

[0158] For example, the necked portion 642 can extend into the separation chamber 71 and be connected with the second sieve plate 75, so that the oversized floc 2 cannot flow out from the gap between the necked portion 642 and the second sieve plate 75. In this way, the partitions described above are not needed.

[0159] In some embodiments, referring to Figure 4 and Figure 5 the side wall of the separation chamber 71 is provided with a plurality of recovery holes 713, the size of the recovery holes 713 being greater than the size of the silicon fiber substrate 1 and less than the size of the oversized floc 2. In this way, the separated silicon fiber substrate 1 can be recovered through the recovery holes 713, while the oversized floc 2 remains in the separation chamber 71, facilitating the recycling of the silicon fiber substrate 1.

[0160] For example, the diameter of the recovery holes 713 is also less than the diameter of the friction ball 72, so as to avoid the friction ball 72 from being separated from the separation chamber 71.

[0161] For example, the side wall of the first separation chamber 711 and the side wall of the second separation chamber 712 are each provided with a plurality of recovery holes 713, and the plurality of recovery holes 713 are arranged at intervals along the height direction of the first separation chamber 711 and the second separation chamber 712. For example, the side wall of the first separation chamber 711 and the side wall of the second separation chamber 712 are each provided with three recovery holes 713.

[0162] For example, the side wall of the first separation chamber 711 and the side wall of the second separation chamber 712 are each provided with a second water outlet 714, and the second water outlet 714 is arranged at a height higher than the recovery holes 713.

[0163] The sewage treatment system can also be provided with a turbidity sensor 54 and a micro-scale coagulation monitoring device. The turbidity sensor 54 is arranged in the flocculation chamber 51 and used to monitor the turbidity information in the flocculation chamber 51 in real time. The micro-scale coagulation monitoring device is used to perform in-situ imaging analysis of the morphology of the coagulation alum flower in the coagulation chamber based on image recognition technology on the basis of online turbidity monitoring. Specifically, the micro-scale coagulation monitoring device performs image recognition, measurement and analysis on the generated oversized flocs 2, and cooperates with the beaker test for comparison, so as to optimize the coagulation control parameters for the purpose of improving the effluent quality of the sewage treatment, and thus determine the reagent supplement information. In addition, the micro-scale coagulation monitoring device can also establish a quantitative model of the characteristics of the oversized flocs 2 and the treatment effect on the basis of the in-situ dynamic imaging analysis of the oversized flocs 2, dynamically analyze the distribution of the floc morphology in the tank, further provide a basis for the addition of the reagent, and realize lean operation of the sewage treatment process.

[0164] The sewage treatment method and system provided by the application can save the sedimentation tank, reduce the construction cost and save the construction area, and can effectively remove traditional pollutants (such as organic matter, nitrogen and phosphorus) and emerging pollutants such as microplastics and nanoplastics. In the sewage treatment method and system of the application, the dosage of the coagulant 3 (alum) can be 30 mg / L, the dosage of the flocculant 4 (polyacrylamide) can be 0.30 mg / L, and the pH can be 6.5±0.2. The dosage of the coagulant 3 is saved by 30%-50% compared with the conventional method, and the dosage of the flocculant 4 is saved by 35%-65%, so that the water treatment operation cost is reduced.

[0165] Taking a water supply project as an example, it takes about 175 seconds to reach the target turbidity of 1 NTU in the flocculation chamber 51 using the traditional flocculation-sedimentation method. However, using the sewage treatment method and system provided by the application, it only takes 7-8 seconds to reach the target turbidity of 1 NTU in the flocculation chamber 51 after adding the silicon fiber substrate 1, the coagulant 3 and the flocculant 4 into the sewage.

[0166] Therefore, the sewage treatment method and system provided by the application have wide application prospects in carbon emission reduction and lean operation.

[0167] Although the embodiments of the application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A wastewater treatment method, characterized in that, Includes the following steps: Flocculation stage: Silicon fiber matrix (1), coagulant (3) and flocculant (4) are added to the wastewater. The coagulant (3), the flocculant (4) and the pollutants (21) in the wastewater flocculate on the periphery of the silicon fiber matrix (1) to form super-sized flocs (2). The size of the super-sized flocs (2) is greater than 5000 μm. Screening stage: The oversized flocs (2) are screened and intercepted using a screen (61), and the water flows to the next process; The silicon fiber matrix (1) includes a fiber body (11) and polymeric silicon (12), wherein the polymeric silicon (12) is polymerized at the ends of the fiber body (11); the fiber body (11) is constructed in a flocculent shape and has multiple ends extending outward; there are multiple polymeric silicon (12), and multiple polymeric silicon (12) are polymerized at multiple ends of the fiber body (11); The wastewater treatment method utilizes a wastewater treatment system, which includes: The flocculation mechanism (5) has a flocculation chamber (51), which has a first inlet (511) and a first outlet (512). The first inlet (511) and the first outlet (512) are connected to the chamber of the flocculation chamber (51). The screening mechanism (6) includes a screen (61), which is arranged in the chamber of the flocculation chamber (51) and adjacent to the first outlet (512). The screening mechanism (6) further includes a rotary assembly (62), the screen (61) is constructed in a ring shape and is stretched on the rotary assembly (62), and the rotary assembly (62) is adapted to drive the screen (61) to rotate around its own circumference; The screening mechanism (6) further includes a rinsing assembly (63), which includes a rinsing pipe (631) and a plurality of nozzles (632), the plurality of nozzles (632) being connected to the rinsing pipe (631); the plurality of nozzles (632) are spaced apart inside the screen (61) and facing the screen (61); The screening mechanism (6) further includes a collection hopper (64), which has an expanding neck (641) and a constricting neck (642). The expanding neck (641) is located at the bottom of the screen (61) and is arranged adjacent to the side of the screen (61) away from the first outlet (512). The constricting neck (642) is connected to the outside of the flocculation chamber (51). The wastewater treatment system further includes a substrate separation mechanism (7), which comprises: A separation chamber (71) is provided with a plurality of friction balls (72), and the constricted neck (642) is connected to the separation chamber (71). The sludge chamber (73) is located at the bottom of the separation chamber (71); The first screen plate (74) is arranged between the separation chamber (71) and the sludge chamber (73); The second sieve plate (75) is disposed in the separation chamber (71) and divides the separation chamber (71) into a first separation chamber (711) and a second separation chamber (712). One end of the second sieve plate (75) is connected to the top of the first sieve plate (74), and the other end extends toward the constriction (642); the second sieve plate (75) is adapted to swing between the two ends of the constriction (642) in the radial direction so that the first separation chamber (711) communicates with the constriction (642), or so that the second separation chamber (712) communicates with the constriction (642).

2. The wastewater treatment method according to claim 1, characterized in that, The wastewater treatment method further includes a preparation stage of the silicon fiber matrix (1), the preparation stage comprising: The fiber body (11) is dispersed in a mixed solvent; each gram of the fiber body (11) is dispersed in 50 ml of the mixed solvent; the mixed solvent is a mixture of water and ethanol, and the ratio of water to ethanol is 1:4; After adding reagents and catalysts and stirring, a suspension of the silicon fiber matrix (1) is generated; the reagent is tetraethoxysilane with a concentration of 98% and the catalyst is phosphotungstic acid; the amount of tetraethoxysilane added per gram of the fiber body (11) is 25-35 ml; the amount of phosphotungstic acid added per gram of the fiber body (11) is 50-80 mg. The silicon fiber matrix (1) was separated by gravity separation method. After cleaning the silicon fiber matrix (1) with deionized water, it is dried. Prior to the step of dispersing the fiber bulk (11) in the mixed solvent, the preparation stage further includes a pretreatment step: After washing the fiber body (11) with deionized water, it is dried. The fiber body (11) is washed with a 70% ethanol solution and then dried.

3. The wastewater treatment method according to claim 1, characterized in that, The steps in the flocculation stage include a feeding step: The wastewater is introduced into the flocculation chamber (51) and stirred; The silicon fiber matrix (1) is added into the flocculation chamber (51) and stirred. Add the coagulant (3) into the flocculation chamber (51) and stir; The flocculant (4) is added into the flocculation chamber (51); In the feeding step, the stirring time ranges from 2 to 5 minutes, and the stirring speed ranges from 150 to 320 rpm. The flocculation stage also includes a reaction step: The silicon fiber matrix (1), the coagulant (3), the flocculant (4) and the pollutants (21) in the wastewater are stirred in the flocculation chamber (51); In the reaction step, the stirring time ranges from 4 to 6 minutes, and the stirring speed ranges from 150 to 200 rpm. The flocculation stage also includes a reagent replenishment step: Real-time acquisition of turbidity information within the flocculation chamber (51); Based on the turbidity information, determine the reagent supplementation information for the silicon fiber matrix (1), the coagulant (3), and the flocculant (4); Replenish medication according to the aforementioned medication replenishment information.

4. The wastewater treatment method according to claim 1, characterized in that, Following the screening stage, the wastewater treatment method further includes, Collection phase: Collect the oversized flocs (2) that have been screened and intercepted; Separation stage: Separating the silicon fiber matrix (1) within the supersized flocs (2); Recycling stage: The separated silicon fiber matrix (1) is recycled and reused.

5. The wastewater treatment method according to claim 1, characterized in that, The matrix separation mechanism (7) further includes at least two partitions, which are connected between the neck (642) and the second sieve plate (75), and the at least two partitions are respectively arranged on both sides of the radial direction of the neck (642); When the second sieve plate (75) is connected to one of the partitions, the first separation chamber (711) is connected to the constricted neck (642); When the second sieve plate (75) is connected to another partition plate, the second separation chamber (712) is connected to the constricted neck (642).

6. The wastewater treatment method according to claim 1, characterized in that, The sidewall of the separation chamber (71) is provided with a plurality of recovery holes (713), the size of which is larger than the size of the silicon fiber matrix (1) and smaller than the size of the super-sized flocs (2).

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