CN216073160U - Forward osmosis device for controlling membrane pollution by quorum sensing - Google Patents
Forward osmosis device for controlling membrane pollution by quorum sensing Download PDFInfo
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- CN216073160U CN216073160U CN202122457224.3U CN202122457224U CN216073160U CN 216073160 U CN216073160 U CN 216073160U CN 202122457224 U CN202122457224 U CN 202122457224U CN 216073160 U CN216073160 U CN 216073160U
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Abstract
The forward osmosis device comprises a raw material liquid circulating system, a drawing liquid circulating system and a forward osmosis membrane cavity, wherein the forward osmosis membrane cavity comprises a forward osmosis membrane, a raw material liquid box and a drawing liquid box which are separated by the forward osmosis membrane, a group quenching sheet is coated on the surface of the forward osmosis membrane facing to one side of the raw material liquid box, and a pore channel and group induction quenching sterilization are arranged in the group quenching sheet. The quorum sensing quenching bacteria can realize quorum quenching of microorganisms by means of interfering secretion of signal molecules and the like, and block quorum sensing among the microorganisms, so that the microorganisms are controlled, pollution of a forward osmosis membrane caused by accumulation of the microorganisms is avoided, the forward osmosis device has anti-pollution capacity, and the water treatment performance of the forward osmosis device is improved.
Description
Technical Field
The application relates to the technical field of water treatment, in particular to a forward osmosis device for controlling membrane pollution by quorum sensing.
Background
The forward osmosis membrane separation technology in the water treatment technology can realize the spontaneous transmission and separation of molecules on two sides driven by the osmotic pressure difference formed by the concentration difference on the two sides of the membrane without the driving of external pressure, and becomes a promising method in various fields of seawater desalination, wastewater treatment, food processing and the like because the substances do not have phase change, the separation effect is good, the operation is simple and convenient, no chemical side effect is caused, no secondary pollution is caused, the separation products are easy to recover and the like in the separation process.
With the wide development of forward osmosis membrane research, the forward osmosis membrane technology is continuously getting new breakthrough. However, when the forward osmosis membrane is applied to a practical scene, impurities such as organic molecules, inorganic salts, bacterial microorganisms and the like in a complex water body environment are accumulated on the surface of the membrane in an adsorption or attachment manner, so that a membrane pollution problem is caused. On one hand, the membrane pollution blocks the rapid passing of water, and the permeability of the membrane material is seriously influenced along with the increase of the membrane pollution degree, so that the membrane separation efficiency is greatly reduced; on the other hand, small molecular pollutants enter the supporting layer membrane holes to form membrane hole blockage, so that the permeation channels of water molecules are reduced, and the effluent quality is reduced. Therefore, it is important to improve the antifouling performance of the forward osmosis membrane material in an operating device.
SUMMERY OF THE UTILITY MODEL
The application provides an utilize positive penetrant unit that quorum sensing control membrane pollutes can effectively reduce the pollution condition of positive osmotic membrane to simple structure, respond well.
According to an aspect of the present application, there is provided in one embodiment a forward osmosis apparatus having anti-fouling performance, including: the device comprises a raw material liquid circulating system and a drawing liquid circulating system, wherein a forward osmosis membrane cavity is arranged between the raw material liquid circulating system and the drawing liquid circulating system and comprises a forward osmosis membrane, a raw material liquid box and a drawing liquid box which are separated by the forward osmosis membrane, a colony quenching sheet is covered on the forward osmosis membrane facing the raw material liquid box, and the colony quenching sheet is provided with a pore channel and colony induction quenching sterilization.
Optionally, the group quenching sheet is made of sodium alginate, chitin, lignin or polyvinyl alcohol.
Optionally, the colony quenching sheet is a membrane with a plurality of hollow pore channels, which is prepared by scraping membrane casting solution prepared from sodium alginate, chitin, lignin or polyvinyl alcohol.
Optionally, the drawing liquid circulating system includes a drawing liquid tank and a drawing liquid circulating channel disposed between the drawing liquid tank and the drawing liquid tank;
the draw solution circulation passage includes: the liquid tank and the liquid tank are connected through the liquid conveying pipeline and the liquid return pipeline to form a loop, so that the circulating flow of the liquid is realized.
Optionally, a drawing liquid peristaltic pump and a drawing liquid flow regulating valve are arranged on the drawing liquid conveying pipeline, the drawing liquid peristaltic pump is used for driving the drawing liquid to flow, and the drawing liquid flow regulating valve is used for controlling the flow rate of the drawing liquid.
Optionally, the raw material liquid circulation system includes a raw material liquid tank and a raw material liquid circulation channel disposed between the raw material liquid tank and the raw material liquid tank;
the raw material liquid circulation passage includes: the raw material liquid tank is connected with the raw material liquid tank through the raw material liquid conveying pipeline and the raw material liquid backflow pipeline to form a loop, so that the raw material liquid flows circularly.
Optionally, be equipped with raw materials liquid peristaltic pump and raw materials liquid flow control valve on the raw materials liquid pipeline, raw materials liquid peristaltic pump is used for driving the raw materials liquid and flows, raw materials liquid flow control valve is used for controlling the velocity of flow of raw materials liquid.
Optionally, an electronic balance is arranged below the drawing liquid tank, and the electronic balance is used for detecting the mass change of the drawing liquid.
Optionally, a thermostatic controller is arranged below the raw material liquid tank and used for adjusting the temperature of the raw material liquid.
Optionally, the device further comprises a conductivity meter, and a probe of the conductivity meter extends into the raw material liquid tank.
According to the positive osmosis device with the anti-pollution performance of the embodiment, the positive osmosis device comprises a raw material liquid circulating system, a drawing liquid circulating system and a positive osmosis membrane cavity, wherein the positive osmosis membrane cavity comprises a positive osmosis membrane, and a raw material liquid tank and a drawing liquid tank which are separated by the positive osmosis membrane, a colony quenching sheet is coated on the surface of the positive osmosis membrane facing to one side of the raw material liquid tank, a pore channel is formed in the colony quenching sheet, and colony induction quenching sterilization is performed. The quorum sensing quenching bacteria can realize quorum quenching of microorganisms by means of interfering secretion of signal molecules and the like, and block quorum sensing among the microorganisms, so that the microorganisms are controlled, pollution of the forward osmosis membrane caused by accumulation of the microorganisms is avoided, the forward osmosis device has self-cleaning capability, and the water treatment quality of the forward osmosis device is improved.
Drawings
Fig. 1 is a schematic structural diagram of a forward osmosis apparatus with anti-fouling performance according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an internal detailed structure of a quorum sensing quenching plate according to an embodiment of the present invention.
Detailed Description
The present application will be described in further detail below with reference to the accompanying drawings by way of specific embodiments. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances. In some instances, certain operations related to the present application have not been shown or described in detail in order to avoid obscuring the core of the present application from excessive description, and it is not necessary for those skilled in the art to describe these operations in detail, so that they may be fully understood from the description in the specification and the general knowledge in the art.
Furthermore, the features, operations, or characteristics described in the specification may be combined in any suitable manner to form various embodiments, and the operation steps involved in the embodiments may be interchanged or modified in order as will be apparent to those skilled in the art. Accordingly, the description and drawings are merely for clarity of description of certain embodiments and are not intended to necessarily refer to a required composition and/or order.
The numbering of the components as such, e.g., "first", "second", etc., is used herein only to distinguish the objects as described, and does not have any sequential or technical meaning. The term "connected" and "coupled" when used in this application, unless otherwise indicated, includes both direct and indirect connections (couplings).
As known from the background art, forward osmosis membranes in forward osmosis devices currently used in water treatment technologies are easily polluted, so that die holes are blocked, and the quality of effluent water is reduced.
Through analysis, in the process of forming membrane pollution, membrane pollution caused by microorganisms such as Extracellular Polymeric Substance (EPS), protein, polypeptide, fat, polysaccharide and other macromolecules is difficult to recover the membrane flow rate through conventional cleaning, and is an important factor influencing the performance of the forward osmosis membrane. The secretion mechanism of the microorganism for starting extracellular organic matters is governed by the concentration of quorum sensing signal molecules among microorganisms, and quorum quenching can be realized by means of interfering the secretion recognition of the signal molecules, decomposing the signal molecules and the like, namely quorum sensing among the microorganisms is blocked, so that membrane pollution caused by the microorganisms is controlled. Quorum quenching is one of the important control strategies for pathogenicity control, decay prevention and reduction of biofilm pollution at present. This prior art has been used primarily in the medical field, for example, in the application of quorum quenching technology to membrane fouling control in membrane bioreactor systems.
Through creative work, the forward osmosis device with the anti-pollution performance is formed by applying a colony quenching technology to the forward osmosis device in the application, and comprises a raw material liquid circulating system, a drawing liquid circulating system and a forward osmosis membrane cavity, wherein the forward osmosis membrane cavity comprises a forward osmosis membrane, a raw material liquid box and a drawing liquid box which are separated by the forward osmosis membrane, the surface of the forward osmosis membrane facing one side of the raw material liquid box is coated with a colony quenching sheet, and the colony quenching sheet is formed by a polymer chain with colony quenching induction bacterial liquid and is provided with a plurality of pore channels and colony induction quenching bacteria, so that the colony induction of microorganisms can be realized by the colony quenching bacteria through means of interfering the secretion of signal molecules and the like, the colony induction among the microorganisms is blocked, the microorganisms are controlled, the pollution of the forward osmosis membrane caused by the accumulation of the microorganisms is avoided, and the forward osmosis device has the anti-pollution performance, the water treatment performance of the forward osmosis device is improved.
Referring to fig. 1, the present embodiment provides a forward osmosis apparatus including: a raw material liquid circulating system, a drawing liquid circulating system, a forward osmosis membrane cavity and a colony quenching sheet 4.
The forward osmosis membrane cavity comprises a forward osmosis membrane 3 and a raw material liquid tank 6 and a draw liquid tank 5 which are separated by the forward osmosis membrane 3, wherein the colony quenching sheet 4 is positioned on the surface of the forward osmosis membrane 3 on the side facing the raw material liquid tank 6, and the colony quenching sheet 4 is provided with a pore canal in which colony induction quenching bacteria is arranged.
In this embodiment, the forward osmosis membrane 3 and the colony quenching sheet 4 can be fixed between the raw material liquid tank 6 and the draw liquid tank 5 by metal screws 15.
The forward osmosis membrane 3 on one side of the raw material liquid circulation system is more likely to cause microorganism accumulation to cause clogging. Therefore, the quenching pellet 4 is provided on the forward osmosis membrane 3 on the side opposite to the raw material liquid tank 6, and the quenching pellet 4 is attached to the cell line to perform quenching. It is understood that quorum-quenching bacteria are bacteria that can interfere with secretion of signal molecules and other means to achieve quorum-quenching of microorganisms. The quorum sensing quenching sterilization realizes quorum quenching of microorganisms by means of interfering secretion of signal molecules and the like, namely quorum sensing among the microorganisms can be blocked, so that the microorganisms are controlled, and pollution of the forward osmosis membrane 3 caused by accumulation of the microorganisms is avoided, so that the forward osmosis device has self-cleaning capability, and the quality of water treatment is improved.
In this embodiment, the group quenching sheet 4 is made of sodium alginate, chitin, lignin or polyvinyl alcohol.
Referring to fig. 2, the quenching sheet 4 is a membrane with a plurality of hollow channels formed by scraping casting solution made of sodium alginate, chitin, lignin or polyvinyl alcohol.
It is understood that the polymer solution is a polymer solution formed by dissolving a membrane material (the above-mentioned polymer compound made of sodium alginate, chitin, lignin or polyvinyl alcohol) in a good solvent and adding a pore-forming agent. And uniformly mixing the colony-quenching induced bacteria liquid and the polymer solution to form a membrane casting solution, wherein the proportions of the components in the membrane casting solution are different, and the prepared membranes have different separation performance and geometric shapes. In this example, the casting solution containing the quorum sensing quenching medium 100 was scraped into a membrane having pores (similar to a sponge, and the quorum sensing quenching medium 100 was attached to the pores inside the similar sponge, see fig. 2) to form a quorum quenching sheet 4.
The drawing liquid circulating system comprises a drawing liquid tank 1 and a drawing liquid circulating channel arranged between the drawing liquid tank 1 and the drawing liquid tank 5. This draw liquid circulation channel includes: the drawing liquid tank 1 and the drawing liquid tank 5 are connected through the drawing liquid conveying pipeline 18 and the drawing liquid return pipeline 2 to form a loop. The water outlet of the drawing liquid tank 1 may be connected to the inlet of the drawing liquid tank 5 of the cavity of the forward osmosis membrane 3 through the drawing liquid conveying pipeline 18, and the outlet of the drawing liquid tank 5 is communicated with the drawing liquid tank 1 through the drawing liquid return pipeline 2, so that the drawing liquid after forward osmosis treatment circularly flows into the drawing liquid tank 1, and the circular flow of the drawing liquid is realized.
In this embodiment, a pumping liquid peristaltic pump 17 and a pumping liquid flow regulating valve 16 are disposed on the pumping liquid conveying pipe 18, the pumping liquid peristaltic pump 17 is used for driving the pumping liquid to flow, and the pumping liquid flow regulating valve 16 is used for controlling the flow rate of the pumping liquid. For example, the draw solution flow rate adjustment valve 16 may release the draw solution after forward osmosis treatment, and may control the flow rate of the draw solution.
In this embodiment, the pumping liquid peristaltic pump 17 is close to the pumping liquid tank 1, and the pumping liquid flow regulating valve 16 is close to the pumping liquid tank 5.
The raw material liquid circulation system comprises a raw material liquid tank 8 and a raw material liquid circulation channel arranged between the raw material liquid tank 8 and the raw material liquid tank 6. This raw material liquid circulation channel includes: a raw material liquid conveying pipeline 13 and a raw material liquid return pipeline 7, wherein the raw material liquid tank 8 and the raw material liquid tank 6 are connected through the raw material liquid conveying pipeline 13 and the raw material liquid return pipeline 7 to form a loop. The outlet of the raw material liquid tank 8 may be connected to the inlet of the raw material liquid tank 6 of the forward osmosis membrane 3 via a raw material liquid transfer pipe 13, and the outlet of the raw material liquid tank 6 may be connected to the raw material liquid tank 8 via a raw material liquid return pipe 7, so that the raw material liquid after forward osmosis treatment is circulated and flowed into the raw material liquid tank 8, thereby realizing the circulation flow of the raw material liquid.
In this embodiment, a raw material liquid peristaltic pump 12 and a raw material liquid flow rate adjusting valve 14 are provided on the raw material liquid conveying pipe 13, the raw material liquid peristaltic pump 12 is configured to drive the raw material liquid to flow, and the raw material liquid flow rate adjusting valve 14 is configured to control the flow rate of the raw material liquid. For example, the raw material liquid flow rate adjustment valve 14 can release the raw material liquid after the forward osmosis treatment, and can control the flow rate of the raw material liquid.
In this embodiment, the raw material liquid peristaltic pump 12 is disposed near the raw material liquid tank 8, and the raw material liquid flow rate adjusting valve 14 is disposed near the raw material liquid tank 6.
In this embodiment, an electronic balance 19 is disposed below the drawing liquid tank 1, and the electronic balance 19 is used for detecting a change in the quality of the drawing liquid.
In this embodiment, in order to reduce adverse effects due to temperature changes, a constant temperature controller 11 for adjusting the temperature of the raw material liquid and reducing temperature fluctuations is provided below the raw material liquid tank 8.
In this embodiment, in order to monitor the change of ion concentration in the conductivity in the raw material liquid tank 8, the conductivity of the raw material liquid is measured by the conductivity meter measuring probe 9 built in the raw material liquid tank 8, and finally, the conductivity value is read by the connected conductivity meter 10.
In this embodiment, to 3 in-process problems that lead to the performance degradation of forward osmosis membrane because of membrane pollution of forward osmosis membrane, the thought through being applied to forward osmosis system with quorum sensing quenching technique effectively realizes forward osmosis unit's automatically cleaning ability, a forward osmosis unit with anti-soil ability is provided, and is easy and simple to handle, can effectively reduce the pollution of forward osmosis membrane in the device, and, the quality of liquid is drawn in measurement that can be continuous accurate through electronic balance, monitor the dynamic change of 3 osmotic capacities of forward osmosis membrane, accurately control feed solution and the velocity of flow size of drawing liquid through peristaltic pump and flow control valve, can real-time supervision feed solution survey the conductivity change through the conductivity meter.
The present invention has been described in terms of specific examples, which are provided to aid understanding of the utility model and are not intended to be limiting. For a person skilled in the art to which the utility model pertains, several simple deductions, modifications or substitutions may be made according to the idea of the utility model.
Claims (10)
1. A forward osmosis apparatus for controlling membrane fouling by quorum sensing, comprising: the device comprises a raw material liquid circulating system and a drawing liquid circulating system, wherein a forward osmosis membrane cavity is arranged between the raw material liquid circulating system and the drawing liquid circulating system and comprises a forward osmosis membrane, a raw material liquid box and a drawing liquid box which are separated by the forward osmosis membrane, a group quenching sheet is covered on the forward osmosis membrane facing the raw material liquid box, and the group quenching sheet is provided with a pore channel and group induction quenching sterilization.
2. The forward osmosis apparatus of claim 1, wherein the matrix of the quorum quenching sheet is sodium alginate, chitin, lignin, or polyvinyl alcohol.
3. The forward osmosis apparatus of claim 1, wherein the quorum quenching sheet is a membrane with a plurality of pores formed by scraping casting solution made of sodium alginate, chitin, lignin or polyvinyl alcohol.
4. The forward osmosis apparatus of claim 1, wherein the draw solution circulation system comprises a draw solution tank and a draw solution circulation channel disposed between the draw solution tank and the draw solution tank;
the draw solution circulation passage includes: the liquid tank and the liquid tank are connected through the liquid conveying pipeline and the liquid return pipeline to form a loop, so that the circulating flow of the liquid is realized.
5. The forward osmosis device of claim 4, wherein a draw solution peristaltic pump and a draw solution flow regulating valve are arranged on the draw solution conveying pipeline, the draw solution peristaltic pump is used for driving the flow of the draw solution, and the draw solution flow regulating valve is used for controlling the flow rate of the draw solution.
6. The forward osmosis apparatus of claim 1, wherein the feed liquid circulation system comprises a feed liquid tank and a feed liquid circulation channel disposed between the feed liquid tank and the feed liquid tank;
the raw material liquid circulation passage includes: the raw material liquid tank is connected with the raw material liquid tank through the raw material liquid conveying pipeline and the raw material liquid backflow pipeline to form a loop, so that the raw material liquid flows circularly.
7. The forward osmosis apparatus according to claim 6, wherein a raw material liquid peristaltic pump for driving a raw material liquid to flow and a raw material liquid flow regulating valve for controlling a flow rate of the raw material liquid are provided on the raw material liquid delivery pipe.
8. The forward osmosis apparatus of claim 1, wherein an electronic balance is arranged below the draw solution tank, and the electronic balance is used for detecting the change of the mass of the draw solution.
9. The forward osmosis apparatus of claim 1, wherein a thermostatic control is provided below the feed solution tank for adjusting the temperature of the feed solution.
10. The forward osmosis apparatus of claim 1, further comprising a conductivity meter, a probe of which extends into the feed solution tank.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122457224.3U CN216073160U (en) | 2021-10-12 | 2021-10-12 | Forward osmosis device for controlling membrane pollution by quorum sensing |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202122457224.3U CN216073160U (en) | 2021-10-12 | 2021-10-12 | Forward osmosis device for controlling membrane pollution by quorum sensing |
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| CN216073160U true CN216073160U (en) | 2022-03-18 |
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