Novel low-energy-consumption concentrated water production system

Abstract

The utility model relates to the technical field of sewage treatment, in particular to a novel low-energy-consumption concentrated water production system. The utility model provides a novel low-energy-consumption concentrated water production system. The novel low-energy-consumption concentrated water production system comprises a main body shell, a concentrated ionic membrane roll, a base, an anode water inlet pipe and a concentrated circulating water outlet pipe, a cavity is formed in the main body shell, and the base is vertically mounted in the cavity; the concentrated ion membrane roll is vertically arranged between the inner top wall of the main body shell and the top surface of the base, and the concentrated ion membrane roll comprises a tubular cation exchange membrane and a tubular anion exchange membrane. According to the novel low-energy-consumption concentrated water production system, an electric field is formed between the anode and the cathode to drive anions in the cathode chamber and cations in the anode chamber to directionally migrate to the concentration chamber, so that the concentration effect is generated, a nutrient solution is discharged when reaching the concentration of a concentrated solution, and the nutrient solution is used as a plant nutrient solution or culture water to treat microalgae; the concentration and the recovery of nutrients in the domestic sewage are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of sewage treatment, in particular to a novel low-energy consumption concentrated water production system. Background Art

[0002] Domestic sewage contains a variety of waste products from our daily lives, including feces, fat, food scraps, detergents, and pharmaceuticals. In terms of chemical composition, 1 cubic meter of domestic sewage contains 200-600 grams of COD (Chemical Oxygen Demand), 20-60 grams of nitrogen (in the form of ammonium and organic compounds), and 3-10 grams of phosphorus (in the form of phosphates and organic compounds).

[0003] Currently, most domestic sewage is treated using the "activated sludge process" and its variations, which remove pollutants through the combined action of oxygen and bacteria. This method is simple and effective for removing organic compounds, nitrogen, and phosphorus. Since nitrogen and phosphorus are both raw materials for fertilizer production, the energy contained in the organic matter in domestic sewage is largely wasted when the activated sludge process is used to treat domestic sewage. By adding calcium, iron, or aluminum salts for precipitation, 90% of the phosphorus is ultimately transferred to the sludge, which is currently more difficult to effectively treat. At the same time, the secondary pollution caused by the sludge also offsets the water plant's emission reduction efficiency, and more than 80% of the nitrogen is lost through the conversion of microorganisms into nitrogen gas.

[0004] A small portion of domestic wastewater is treated using bioelectrochemical systems (BES). These systems combine electrochemical systems with biological treatment, using microorganisms as catalysts to accelerate pollutant degradation while simultaneously generating clean electricity or consuming minimal amounts of it. This approach utilizes pollutants for power generation, resulting in a wider range of wastewater applications and simplified energy utilization. However, most current BES research focuses on desalination of high-concentration wastewater, with few reports on practical applications for wastewater treatment. Furthermore, the yield of concentrating and recovering nutrients from domestic wastewater in a reusable form is low.

[0005] Therefore, there is currently a lack of an efficient device for concentrating and recovering nutrients in domestic sewage in a reusable form. Utility Model Content

[0006] (1) The problem to be solved by the present invention is that there is currently a lack of an efficient device for concentrating and recovering nutrients in domestic sewage in a reusable form.

[0007] (2) Technical solution

[0008] A novel low-energy concentrated water production system comprises a main body shell, a concentrated ion membrane roll, a base, an anode water inlet pipe and a concentrated circulating water outlet pipe; the main body shell has a cavity inside, and the base is vertically installed in the cavity;

[0009] The concentrated ion membrane roll is vertically arranged between the inner top wall of the main body shell and the top surface of the base, and the concentrated ion membrane roll includes a tubular cation exchange membrane and an anion exchange membrane;

[0010] The anion exchange membrane is sleeved on the outside of the cation exchange membrane, the interior of the cation exchange membrane forms an anode chamber, the anode chamber forms an anaerobic environment, and electrogenic bacteria are arranged in the anode chamber;

[0011] A concentration chamber is formed between the cation exchange membrane and the anion exchange membrane, and a cathode chamber with an aerobic environment is formed between the anion exchange membrane and the inner wall of the main body shell;

[0012] The base is provided with a drainage hole, and the anode chamber, the drainage hole and the cathode chamber are connected in sequence;

[0013] One end of the anode water inlet pipe extends into the anode chamber, and is used to inject domestic sewage into the anode chamber;

[0014] One end of the concentrated circulating water outlet pipe extends into the concentrating chamber, and the other end thereof extends out of the main body shell for discharging the concentrated water in the concentrating chamber.

[0015] According to one embodiment of the present invention, it further includes an anode electrode disposed in the anode chamber, a cathode electrode disposed in the cathode chamber, a conductive wire and a resistor, wherein the anode electrode, the resistor and the cathode electrode are connected in series via the conductive wire.

[0016] According to one embodiment of the present invention, it also includes a water pump, a concentrated circulating water inlet pipe and a concentrated circulating water tank, the concentrated circulating water outlet pipe is connected to the concentrated circulating water tank at one end away from the concentrating chamber, the water inlet of the water pump is connected to the concentrated circulating water tank through a pipeline, one end of the concentrated circulating water inlet pipe is connected to the water outlet of the water pump, and the other end thereof extends into the concentrating chamber.

[0017] According to one embodiment of the present invention, one end of the concentrated circulating water outlet pipe extends into the concentrated chamber from the bottom of the concentrated chamber, and one end of the concentrated circulating water inlet pipe extends into the concentrated chamber from the top of the concentrated chamber.

[0018] According to one embodiment of the present invention, it also includes a cathode water outlet pipe and a cathode water outlet collecting water tank. The side wall of the main shell is provided with a water outlet near its top surface. One end of the cathode water outlet pipe is sealed with the water outlet, and the other end is connected to the cathode water outlet collecting water tank.

[0019] According to one embodiment of the present invention, the concentrated ion membrane roll also includes a plastic support net and a water-pass lining layer. The plastic support net is wound into a tube net shape, and the plastic support net is arranged between the top surface of the base and the inner top wall of the main body shell. The cation exchange membrane is attached to the outer side of the plastic support net. The water-pass lining layer is tubular and is sleeved on the outside of the cation exchange membrane. The outer side surface of the cation exchange membrane is attached to the inner side surface of the water-pass lining layer, and the inner wall of the anion exchange membrane is attached to the outer side surface of the water-pass lining layer.

[0020] According to one embodiment of the present invention, the anode electrode includes a carbon brush, and the cathode electrode includes a carbon felt wound on the peripheral surface of the anion exchange membrane, and a titanium mesh is wound on the outer peripheral surface of the carbon felt.

[0021] According to one embodiment of the present invention, it also includes an aeration mechanism, which includes an aeration pipe, an aeration fan and an air outlet pipe. The aeration pipe is sleeved on the outside of the titanium mesh, one end of the air outlet pipe is connected to the air outlet of the aeration fan, and the other end is connected to the aeration pipe.

[0022] According to an embodiment of the present invention, the anion exchange membrane and the cation exchange membrane are both in a tubular shape, and the main body shell is in a cylindrical shape.

[0023] According to one embodiment of the present invention, the base is in the shape of a truncated cone, the diameter of its top surface is larger than the diameter of its bottom surface, and the drainage hole is coaxially arranged with the base.

[0024] Beneficial effects of the utility model:

[0025] The utility model provides a novel low-energy consumption concentrated water production system, comprising a main body shell, a concentrated ion membrane roll, a base, an anode water inlet pipe and a concentrated circulating water outlet pipe; the main body shell has a cavity inside, and the base is vertically installed in the cavity; the concentrated ion membrane roll is vertically arranged between the inner top wall of the main body shell and the top surface of the base, and the concentrated ion membrane roll comprises a tubular cation exchange membrane and an anion exchange membrane; the anion exchange membrane is sleeved on the outside of the cation exchange membrane, and the inside of the cation exchange membrane forms an anode chamber, which forms an anaerobic environment, and electrogenic bacteria are arranged in the anode chamber; a concentrating chamber is formed between the cation exchange membrane and the anion exchange membrane, and a cathode chamber with an aerobic environment is formed between the anion exchange membrane and the inner wall of the main body shell; a drainage hole is provided on the base, and the anode chamber, the drainage hole and the cathode chamber are connected in sequence; one end of the anode water inlet pipe extends into the anode chamber for injecting domestic sewage into the anode chamber; one end of the concentrated circulating water outlet pipe extends into the concentrating chamber, and the other end thereof extends out of the main body shell for discharging concentrated water in the concentrating chamber.

[0026] This new low-energy concentrated water production system embeds an anode in an anode chamber under an anaerobic environment. Anaerobic electroactive bacteria attached to the anode decompose organic matter and release electrons. The electrons are transferred to the cathode in the cathode chamber under an aerobic environment through an external circuit, forming an electric field between the anode and the cathode. Domestic sewage comes from domestic sewage after hydrolysis and acidification in a sewage treatment plant. The hydrolyzed and acidified domestic sewage is injected into the anode chamber through the anode water inlet pipe. Under the action of the electric field, positively charged cations (ammonia ions) enter the concentration chamber through the cation exchange membrane, while anions (nitrate, nitrite, phosphate ions) cannot pass through the cation exchange membrane due to the selective permeability of the ion membrane and the action of the electric field. Domestic sewage flows into the cathode chamber from the drain hole. As the water level in the cathode chamber gradually rises above the base, the anions (nitrate, nitrite, phosphate ions) in the domestic sewage in the cathode chamber pass through the anion exchange membrane and enter the concentration chamber under the action of the electric field. As more and more nitrogen and phosphorus enter the concentration chamber, the concentration of the nutrient solution in the concentration chamber gradually increases. When the concentration reaches the set value, the valve on the concentrated circulating water outlet pipe is opened, and the nutrient solution in the concentration chamber is pumped out for use as plant nutrient solution or for cultivating water treatment microalgae.

[0027] It can be seen that in this embodiment, an anode is embedded in the anode chamber under an anaerobic environment, and the anaerobic electroactive bacteria attached to the anode decompose organic matter and release electrons. The electrons are transferred to the cathode in the cathode chamber under an aerobic environment through an external circuit. An electric field is formed between the anode and the cathode to drive the anions (nitrate, nitrite, phosphate and other ions) in the cathode chamber and the cations (ammonia ions) in the anode chamber to migrate toward the concentration chamber, causing a concentration effect. When the nutrient solution reaches the concentrated solution concentration, it is discharged and used as plant nutrient solution or culture water to treat microalgae, thereby realizing the concentration and recovery of nutrients in domestic sewage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 A structural diagram provided for an embodiment of the present utility model;

[0030] Figure 2 A cross-sectional view of the main body housing, base, and concentrated ion membrane roll provided in an embodiment of the present utility model;

[0031] Figure 3 A cross-sectional view of a base and an ion-concentrating membrane roll provided in an embodiment of the present invention.

[0032] Icons: 1. Anode water inlet pipe; 2. Concentrated ion membrane roll; 3. Aeration pipe; 4. Aeration fan; 401. Air outlet pipe; 5. Concentrated circulating water inlet pipe; 6. Concentrated circulating water outlet pipe; 7. Water pump; 8. Concentrated water circulating water tank; 9. Concentrated water outlet pipe; 10. Cathode water outlet pipe; 11. Cathode water outlet collection tank; 12. Drain pipe; 13. Main body shell; 14. Cathode chamber; 15. Titanium mesh; 16. Carbon felt; 17. Anion exchange membrane; 18. Concentrating chamber; 19. Cation exchange membrane; 20. Plastic support mesh; 21. Anode chamber; 22. Carbon brush; 23. Base; 231. Drain hole. DETAILED DESCRIPTION

[0033] The following will clearly and completely describe the technical solutions of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0034] like Figure 1-Figure 3 As shown, one embodiment of the present invention provides a novel low-energy concentrated water production system, comprising a main housing 13, a concentrated ion membrane roll 2, a base 23, an anode water inlet pipe 1, and a concentrated circulating water outlet pipe 6; the main housing 13 has a cavity inside, and the base 23 is vertically installed in the cavity; the concentrated ion membrane roll 2 is vertically arranged between the inner top wall of the main housing 13 and the top surface of the base 23, and the concentrated ion membrane roll 2 includes a tubular cation exchange membrane 19 and an anion exchange membrane 17;

[0035] The anion exchange membrane 17 is sleeved on the outside of the cation exchange membrane 19. The inside of the cation exchange membrane 19 forms an anode chamber 21. The anode chamber 21 forms an anaerobic environment, and electrogenic bacteria are arranged in the anode chamber 21.

[0036] A concentration chamber 18 is formed between the cation exchange membrane 19 and the anion exchange membrane 17, and a cathode chamber 14 with an aerobic environment is formed between the anion exchange membrane 17 and the inner wall of the main shell 13. The anode chamber 21, the concentration chamber 18 and the cathode chamber 14 are independent sealed spaces; a drainage hole 231 is provided on the base 23, and the anode chamber 21, the drainage hole 231 and the cathode chamber 14 are connected in sequence; one end of the anode water inlet pipe 1 extends into the anode chamber 21 for injecting domestic sewage into the anode chamber 21; one end of the concentrated circulating water outlet pipe 6 extends into the concentration chamber 18, and the other end thereof extends out of the main shell 13 for discharging the concentrated water in the concentration chamber 18.

[0037] In this embodiment, an anode is embedded in an anode chamber 21 under an anaerobic environment. Anaerobic electroactive bacteria attached to the anode decompose organic matter and release electrons. These electrons are transferred through an external circuit to a cathode in an aerobic cathode chamber 14 under an aerobic environment, forming an electric field between the anode and cathode. Domestic sewage comes from a sewage treatment plant after hydrolysis and acidification. The hydrolyzed and acidified domestic sewage is injected into the anode chamber 21 through the anode water inlet pipe 1. Under the action of the electric field, positively charged cations (ammonia ions) pass through the cation exchange membrane 19 and enter the concentrating chamber 18. However, anions (nitrate, nitrite, phosphate, etc.) cannot pass through the cation exchange membrane 19 due to the selective permeability of the ion exchange membrane and the action of the electric field. The domestic sewage flows into the cathode chamber 14 through the drainage hole 231. As the water level in the cathode chamber 14 gradually rises above the base 23, the anions (nitrate, nitrite, phosphate ions) in the domestic sewage in the cathode chamber 14 pass through the anion exchange membrane 17 and enter the concentrating chamber 18 under the action of the electric field. As more and more nitrogen and phosphorus enter the concentration chamber 18, the concentration of the nutrient solution in the concentration chamber 18 gradually increases. When the concentration reaches the set value, the valve on the concentrated circulating water outlet pipe 6 is opened, and the nutrient solution in the concentration chamber 18 is extracted and used as plant nutrient solution or culture water for microalgae treatment.

[0038] It can be seen that in this embodiment, an anode is embedded in the anode chamber 21 under an anaerobic environment, and the anaerobic electroactive bacteria attached to the anode decompose organic matter and release electrons. The electrons are transferred to the cathode in the cathode chamber 14 under an aerobic environment through an external circuit. An electric field is formed between the anode and the cathode to drive the anions (nitrate, nitrite, phosphate ions, etc.) in the cathode chamber 14 and the cations (ammonia ions) in the anode chamber 21 to migrate toward the concentration chamber 18, so that a concentration effect occurs. When the nutrient solution reaches the concentrated solution concentration, it is discharged and used as plant nutrient solution or culture water to treat microalgae, thereby realizing the concentration and recovery of nutrients in domestic sewage.

[0039] As a preferred embodiment, in order to increase the concentration of the nutrient solution in the concentration chamber 18, as Figure 1 and Figure 2As shown, the novel low-energy concentrated water production system includes a concentrated water circulation system, which includes a water pump 7, a concentrated circulating water inlet pipe 5, a concentrated water circulating water tank 8 and a concentrated circulating water outlet pipe 6, wherein the first end of the concentrated circulating water outlet pipe 6 enters the cathode chamber 14 and then passes through the base 23 from the lower surface of the base 23 to enter the concentration chamber 18, the first end of the concentrated circulating water outlet pipe 6 is located at the bottom of the concentration chamber 18, and the second end of the concentrated circulating water outlet pipe 6 passes through the main body shell 13 and is connected to the concentrated water circulating water tank 8. The water pump 7 is connected, and the water pump 7 is installed on the top surface of the concentrated water circulating water tank 8. The water inlet of the water pump 7 is connected to the concentrated water circulating water tank 8 through a pipeline. One end of the concentrated circulating water inlet pipe 5 is connected to the water outlet of the water pump 7, and the other end thereof extends from the top of the concentrating chamber 18 into the concentrating chamber 18, that is, the end of the concentrated circulating water inlet pipe 5 extending into the concentrating chamber 18 is located at the top position of the concentrating chamber 18. A concentrated water outlet pipe 9 is connected to the side of the concentrated water circulating water tank 8 near its bottom, and a valve for controlling its on and off is installed on the concentrated water outlet pipe 9.

[0040] Specifically, in this embodiment, Figure 1 and Figure 2 When the first end of the concentrated circulating water outlet pipe 6 is lower than its second end, a pump body is added at this time, the water inlet of the pump body is connected to the second end of the concentrated circulating water outlet pipe 6, and the water outlet of the pump body is connected to the concentrated water circulating water tank 8 through a pipeline.

[0041] In addition, when the first end of the concentrated circulating water outlet pipe 6 is higher than the second end thereof, the nutrient solution entering the concentrated circulating water outlet pipe 6 naturally flows into the concentrated water circulating water tank 8 under the action of gravity.

[0042] In this way, the anions (nitrate, nitrite, phosphate, etc.) in the cathode chamber 14 and the cations (ammonia ions) in the anode chamber 21 undergo directional migration toward the concentrating chamber 18, causing a concentration process. Simultaneously, the water pump 7 and the pump body are turned on. Under the action of the pump body, the nutrient solution in the concentrating chamber 18 enters the concentrated water circulating tank 8 from the concentrated circulating water outlet pipe 6. Under the action of the water pump 7, the nutrient solution in the concentrated water circulating tank 8 is injected into the concentrating chamber 18 through the concentrated circulating water inlet pipe 5, completing one cycle. After multiple cycles of this, the concentration of the nutrient solution in the concentrating chamber 18 gradually increases until it reaches a set value. The valve on the drain pipe 12 is then opened to discharge the nutrient solution for use as plant nutrient solution or for cultivating microalgae. Thus, this concentrated water circulation system can circulate and concentrate the collected nutrients, and when they reach a certain concentration, they are discharged from the system for recycling as plant growth nutrients.

[0043] As an optional embodiment, in order to facilitate the detection of the nutrient solution concentration in the concentrated water circulation tank 8 at any time, an online water quality detector can be set up, and a water pump is set between the online water quality detector and the concentrated water circulation tank 8. The water inlet of the water pump and the concentrated water circulation tank 8 are connected through a first pipe. A valve is installed at one end of the first pipe close to the concentrated water circulation tank 8, and the water outlet of the water pump is connected to the online water quality detector through a second pipe. After opening the valve on the first pipe, the water pump draws the nutrient solution in the online water quality detector into the online water quality detector for detection, and then immediately closes the valve on the first pipe. The online water quality detector detects the TN (total nitrogen) and TP (total phosphorus) concentrations in the nutrient solution. When the nutrient solution concentration reaches the set value, the valve on the drain pipe 12 can be opened to discharge the nutrient solution.

[0044] As a preferred embodiment, in this embodiment, the new low-energy concentrated water production system includes an anode electrode arranged in the anode chamber 21, a cathode electrode arranged in the cathode chamber 14, a conductive wire and a resistor, and the anode electrode, the resistor and the cathode electrode are connected in series through the conductive wire.

[0045] Preferably, Figure 2 and Figure 3 As shown, the main housing 13 is cylindrical and has an opening at the top. A removable sealing plate is sealed at the opening. The concentrated ion membrane roll 2 includes a plastic support mesh 20, a cation exchange membrane 19, a water-passing liner, and an anion exchange membrane 17. The plastic support mesh 20 is wound into a cylindrical shape, with its top end fixed to the inner top wall of the main housing 13 and its bottom end fixed to the upper surface of the base 23. The interior space of the plastic support mesh 20 forms the anode chamber 21. The cation exchange membrane 19 is completely wrapped around the plastic support mesh 20, with its upper and lower ends aligned with the plastic support mesh 20. A portion of the inner surface of the cation exchange membrane 19 is bonded to a portion of the outer surface of the plastic support mesh 20. The plastic support mesh 20 provides support for the cation exchange membrane 19 and provides ample water-passing space for the anode chamber 21. The plastic support mesh 20 and the cation exchange membrane 19 form the first layer of the concentrated ion membrane roll 2.

[0046] Furthermore, the anion exchange membrane 17 and the cation exchange membrane 19 are coaxially arranged, with the anion exchange membrane 17 positioned outside the cation exchange membrane 19. The space formed by the inner side of the anion exchange membrane 17 and the outer side of the cation exchange membrane 19 constitutes the concentrating chamber 18. A cylindrical water-pass liner is disposed within the concentrating chamber 18, with the inner side of the water-pass liner aligned with the outer side of the cation exchange membrane 19 at its upper and lower ends, and a portion of the water-pass liner is bonded to the outer side of the cation exchange membrane 19. The anion exchange membrane 17 is aligned with the water-pass liner at its upper and lower ends and wrapped around the water-pass liner, with a portion of the inner wall of the anion exchange membrane 17 bonded to the outer side of the water-pass liner. The water-pass liner provides support for the cation exchange membrane 19 and the anion exchange membrane 17 and has a certain water-passing capacity. The water-pass liner is preferably a perforated plastic tube. The concentrating chamber 18 and the water-pass liner disposed therein form the second layer of the concentrating ion membrane roll 2, while the anion exchange membrane 17 forms the third layer of the concentrating ion membrane roll 2.

[0047] As a specific embodiment, in this embodiment, the anode electrode is a carbon brush 22, which is vertically arranged in the anode chamber 21. The cathode electrode is a carbon felt 16 wrapped around the circumference of the anion exchange membrane 17, and the titanium mesh 15 is wrapped around the outer circumference of the carbon felt 16. Specifically, the carbon felt 16 is rolled into a cylindrical shape, and the titanium mesh 15 is wrapped around the outside of the carbon felt 16. The upper and lower ends of the titanium mesh 15 and the carbon felt 16 are aligned and bonded. Then, the cylindrical shape of the titanium mesh 15 and carbon felt 16 is placed outside the anion exchange membrane 17.

[0048] Furthermore, before use, the carbon brush 22 needs to be pre-treated with acetone and ethanol to remove impurities on the carbon brush 22. In order to improve the cathode oxygen reduction performance, the carbon felt 16 is also subjected to a pore opening treatment in this embodiment.

[0049] It should be noted that, in this embodiment, the anode chamber 21, the concentration chamber 18 and the cathode chamber 14 are independent sealed spaces, so that the concentration efficiency is improved.

[0050] In this embodiment, if Figure 2 and Figure 3 As shown, the base 23 is in the shape of an inverted truncated cone, with a diameter of the top surface being larger than that of the bottom surface. A vertical drainage hole 231 is provided within the base 23. The drainage hole 231 is coaxial with the base 23 and the anode chamber 21. After domestic sewage enters the anode chamber 21 through the anode water inlet pipe 1, the domestic sewage in the anode chamber 21 flows into the cathode chamber 14 through the drainage hole 231.

[0051] Furthermore, a plurality of connecting rods 24 are fixedly installed between the side surface of the base 23 and the inner wall of the main shell 13 , and the connecting rods 24 play a role in supporting the base 23 .

[0052] Preferably, Figure 1 As shown, the novel low-energy consumption concentrated water production system further includes a cathode outlet pipe 10 and a cathode outlet water collection tank 11, as shown in FIG. Figure 2 As shown, a water outlet is provided on the side wall of the main shell 13 near its top surface, one end of the cathode water outlet pipe 10 is sealed with the water outlet, and the other end thereof is connected to the cathode water outlet collecting tank 11, and a drain pipe 12 is connected to the side of the cathode water outlet collecting tank 11 near its bottom, and the drain pipe 12 is connected to the inside of the cathode water outlet collecting tank 11, and a valve for controlling its on and off is installed on the drain pipe 12.

[0053] It should be noted that domestic sewage flows into the anode chamber 21 through the anode water inlet pipe 1, and part of the domestic sewage in the anode chamber 21 flows into the cathode chamber 14 from the drainage hole 231. As the water level in the cathode chamber 14 continues to rise, until the water level exceeds the cathode outlet pipe 10, the domestic sewage in the cathode chamber 14 will overflow from the cathode outlet pipe 10 and flow into the cathode outlet collection tank 11.

[0054] As a preferred embodiment, the novel low-energy concentrated water production system includes an aeration mechanism, the function of which is to provide an aerobic environment for the cathode chamber 14. Specifically, Figure 1 As shown, the aeration mechanism includes an aeration pipe 3, an aeration fan 4 and an outlet pipe 401. The aeration pipe 3 is sleeved on the titanium mesh 15 and is close to the bottom of the titanium mesh 15. The aeration pipe 3 has multiple aeration holes. One end of the outlet pipe 401 is connected to the air outlet of the aeration fan 4, and the other end is connected to the aeration pipe 3.

[0055] The cation exchange membrane 19 and anion exchange membrane 17 in this embodiment are constructed from ion exchange membranes with low electrical resistance, high anti-pollution properties, high mechanical strength, high burst strength, high ion exchange capacity, and high permselectivity. Specifically, the membranes are constructed from materials that meet the requirements of a resistance of 1.6 Ωcm², an exchange capacity >2.2 mol / kg, a migration number >0.95, a burst strength >0.6 MPa, and excellent anti-pollution properties. These membranes exhibit low electrical resistance, high ion exchange capacity and permselectivity, resulting in high electricity generation efficiency and a high concentrated water yield.

[0056] In summary, in the new low-energy concentrated water production system, the domestic sewage after hydrolysis and acidification is injected into the anode chamber 21 through the anode water inlet pipe 1. Under the action of the electric field, the positively charged cations pass through the cation exchange membrane 19 and enter the concentration chamber 18, and the domestic sewage flows into the cathode chamber 14 from the drainage hole 231. As the water level in the cathode chamber 14 gradually rises to above the base 23, the anions in the domestic sewage in the cathode chamber 14 pass through the anion exchange membrane 17 and enter the concentration chamber 18 under the action of the electric field. Then the water pump 7 and the pump body are turned on. Under the action of the pump body, the nutrient solution in the concentration chamber 18 enters the concentrated water circulation tank 8 from the concentrated circulating water outlet pipe 6. Under the action of the water pump 7, the nutrient solution in the concentrated water circulation tank 8 is injected into the concentration chamber 18 through the concentrated circulating water inlet pipe 5, completing one cycle. In this way, after multiple cycles, the concentration of the nutrient solution in the concentration chamber 18 will gradually increase until its concentration reaches the set value. The valve on the drain pipe 12 is opened to discharge the nutrient solution for use as plant nutrient solution or for cultivating water to treat microalgae.

[0057] In the description of this utility model, it should be noted that the terms "upper" and "lower" and other terms indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0058] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or a connection between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In addition, in the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0059] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new low-energy consumption concentrated water production system, characterized in that: It comprises a main body shell (13), a concentrated ion membrane roll (2), a base (23), an anode water inlet pipe (1) and a concentrated circulating water outlet pipe (6); the main body shell (13) has a cavity inside, and the base (23) is vertically installed in the cavity; The concentrated ion membrane roll (2) is vertically arranged between the inner top wall of the main body shell (13) and the top surface of the base (23), and the concentrated ion membrane roll (2) includes a tubular cation exchange membrane (19) and an anion exchange membrane (17); The anion exchange membrane (17) is sleeved on the outside of the cation exchange membrane (19), and the inside of the cation exchange membrane (19) forms an anode chamber (21), the anode chamber (21) forms an anaerobic environment, and electrogenic bacteria are arranged in the anode chamber (21); A concentration chamber (18) is formed between the cation exchange membrane (19) and the anion exchange membrane (17), and a cathode chamber (14) with an aerobic environment is formed between the anion exchange membrane (17) and the inner wall of the main housing (13); The base (23) is provided with a drainage hole (231), and the anode chamber (21) and the cathode chamber (14) are connected through the drainage hole (231); One end of the anode water inlet pipe (1) extends into the anode chamber (21) and is used to inject domestic sewage into the anode chamber (21); One end of the concentrated circulating water outlet pipe (6) extends into the concentration chamber (18), and the other end extends out of the main body shell (13) for discharging the concentrated water in the concentration chamber (18).

2. A novel low-energy consumption concentrated water production system according to claim 1, characterized in that: It also includes an anode electrode arranged in the anode chamber (21), a cathode electrode arranged in the cathode chamber (14), a conductive wire and a resistor, wherein the anode electrode, the resistor and the cathode electrode are connected in series via the conductive wire.

3. A novel low-energy consumption concentrated water production system according to claim 2, characterized in that: It also includes a water pump (7), a concentrated circulating water inlet pipe (5) and a concentrated water circulating water tank (8), wherein one end of the concentrated circulating water outlet pipe (6) away from the concentrated chamber (18) is connected to the concentrated water circulating water tank (8), the water inlet of the water pump (7) is connected to the concentrated water circulating water tank (8) through a pipeline, one end of the concentrated circulating water inlet pipe (5) is connected to the water outlet of the water pump (7), and the other end thereof extends into the concentrated chamber (18).

4. A novel low-energy consumption concentrated water production system according to claim 3, characterized in that: One end of the concentrated circulating water outlet pipe (6) extends from the bottom of the concentrated chamber (18) into the concentrated chamber (18), and one end of the concentrated circulating water inlet pipe (5) extends from the top of the concentrated chamber (18) into the concentrated chamber (18).

5. A novel low-energy consumption concentrated water production system according to claim 4, characterized in that: It also includes a cathode water outlet pipe (10) and a cathode water outlet collection tank (11); a water outlet is provided on the side wall of the main shell (13) near its top surface; one end of the cathode water outlet pipe (10) is sealedly connected to the water outlet, and the other end thereof is connected to the cathode water outlet collection tank (11).

6. A novel low-energy consumption concentrated water production system according to claim 2, characterized in that: The concentrated ion membrane roll (2) further comprises a plastic support net (20) and a water-pass lining layer, wherein the plastic support net (20) is wound into a tubular net shape, and the plastic support net (20) is arranged between the top surface of the base (23) and the inner top wall of the main body shell (13), and the cation exchange membrane (19) is attached to the outer side surface of the plastic support net (20), and the water-pass lining layer is tubular and is sleeved on the outside of the cation exchange membrane (19), and the outer side surface of the cation exchange membrane (19) is attached to the inner side surface of the water-pass lining layer, and the inner wall of the anion exchange membrane (17) is attached to the outer side surface of the water-pass lining layer.

7. A novel low-energy consumption concentrated water production system according to claim 6, characterized in that: The anode electrode includes a carbon brush (22), and the cathode electrode includes a carbon felt (16) wound on the peripheral surface of the anion exchange membrane (17), and a titanium mesh (15) is wound on the outer peripheral surface of the carbon felt (16).

8. A novel low-energy consumption concentrated water production system according to claim 7, characterized in that: The invention also includes an aeration mechanism, which includes an aeration pipe (3), an aeration fan (4) and an air outlet pipe (401). The aeration pipe (3) is sleeved on the outside of the titanium mesh (15). One end of the air outlet pipe (401) is connected to the air outlet of the aeration fan (4), and the other end is connected to the aeration pipe (3).

9. A novel low-energy consumption concentrated water production system according to claim 1, characterized in that: The anion exchange membrane (17) and the cation exchange membrane (19) are both in the shape of a circular tube, and the main body shell (13) is in the shape of a cylinder.

10. A novel low-energy consumption concentrated water production system according to claim 1, characterized in that: The base (23) is in the shape of a truncated cone, the diameter of its top surface is larger than the diameter of its bottom surface, and the drainage hole (231) is coaxially arranged with the base (23).

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