CN209906530U - Reverse osmosis system capable of monitoring microbial fouling degree in real time - Google Patents

Reverse osmosis system capable of monitoring microbial fouling degree in real time Download PDF

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Publication number
CN209906530U
CN209906530U CN201920586154.1U CN201920586154U CN209906530U CN 209906530 U CN209906530 U CN 209906530U CN 201920586154 U CN201920586154 U CN 201920586154U CN 209906530 U CN209906530 U CN 209906530U
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reverse osmosis
tank
dosing
equipment
water
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CN201920586154.1U
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张子潇
魏屹
齐玉
孙萌
芦占赢
李博
顾鑫
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Beijing Yizhuang Environmental Technology Group Co.,Ltd.
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Beijing Yizhuang Water Co Ltd
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Abstract

The utility model discloses a reverse osmosis system of stifled degree of little biological contamination of real-time supervision, including the preliminary treatment equipment that loops through the trunk line intercommunication, filtration equipment, the water tank is produced in the filtration, reverse osmosis equipment and reverse osmosis produce the water tank, be connected with chlorine-containing germicide dosing tank on the trunk line between preliminary treatment equipment and the filtration equipment, the reductant dosing tank has connected gradually along the rivers direction on the trunk line between water tank and the reverse osmosis equipment is produced in the filtration, non-oxidability germicide dosing tank, antisludging agent dosing tank, chlorine residue measuring apparatu and microbial detection ware, above-mentioned four water inlets that add the medicine roof portion all produce the water tank intercommunication through circulating pipe and reverse osmosis, the drain of bottom all communicates with the blow off pipe. The utility model discloses kill the microorganism of aquatic earlier through the dosing tank, measure the BFR index through the microbial detection ware again, BFR numerical value difference can reflect reverse osmosis system's the stifled degree of microorganism pollution, predicts trend and degree that reverse osmosis system biological pollution takes place betterly.

Description

Reverse osmosis system capable of monitoring microbial fouling degree in real time
Technical Field
The utility model relates to a reverse osmosis system of the stifled degree of little biological contamination of real-time supervision.
Background
At present, secondary effluent of a sewage plant is taken as source water for advanced treatment in a regeneration water plant, the regeneration water plant adopts a 'microfiltration + reverse osmosis' process, and in actual operation, the phenomena of water inlet pressure rising, water yield lowering and transmembrane pressure difference rising occur in a microfiltration system and a reverse osmosis system, so that the condition of membrane system fouling is serious. Through experimental analysis, the main cause of system contamination is microbial contamination. Membrane fouling not only reduces the economics of reclaimed water treatment system operation, but also becomes a key issue affecting the application of reverse osmosis technology. Microbial contamination begins to form at the front end of the system and then spreads throughout the system.
The source water of the reclaimed water treatment system contains microorganisms which can be removed by coagulation and filtration, but which have a strong ability to reproduce unlike inanimate particles. Most microorganisms breed offspring in a fission mode, the generation time of the microorganisms is only 20min under a proper environment, and even if few microorganisms enter a reverse osmosis system, a biological membrane can be formed under a proper living condition. The reverse osmosis system has a large membrane surface area, so that the possibility of bacteria adhesion is increased, inorganic and organic pollutants gradually accumulated on the membrane surface become nutrient sources for microorganism propagation along with the increase of the operation time, rich nutrition is provided for microorganisms, and meanwhile, an ideal environment is provided for the growth of the microorganisms in the dark and humid reverse osmosis system. The growth of microorganisms inevitably leads to biological contamination of the reverse osmosis system.
At present, a reverse osmosis system specially used for monitoring the microbial fouling degree in real time does not exist.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, the present invention provides a reverse osmosis system capable of monitoring the microbial contamination degree in real time, which has the advantages of simple structure, low cost, convenient monitoring, and strong real-time performance, the utility model firstly kills the microbes in water by the sterilization equipment, and then determines the microbial mucosa formation Rate (BFR) index by setting the microbial detector, the difference of the BFR value can reflect the microbial contamination degree of the reverse osmosis system, the BFR index is used as a parameter which comprehensively reflects the biofilm formation Rate under various influence factor conditions, can better predict the biological contamination occurrence trend and degree of the reverse osmosis system, and simultaneously, the BFR index can better reflect under different biological contamination control conditions, the sterilization effect on the reverse osmosis system can be used for evaluating the effectiveness of sterilization measures for pretreatment of reverse osmosis influent water.
The utility model discloses a realize through following technical scheme: the utility model provides a reverse osmosis system that can real-time supervision microorganism pollutes stifled degree, including the preliminary treatment equipment that loops through the trunk line intercommunication, filtration equipment, water tank is produced in the filtration, reverse osmosis equipment and reverse osmosis produce the water tank, be connected with chlorine-containing germicide dosing tank on the trunk line between preliminary treatment equipment and the filtration equipment, it has connected gradually the reductant dosing tank along the water flow direction on the trunk line between water tank and the reverse osmosis equipment to filter, non-oxidizing germicide dosing tank, antisludging agent dosing tank, chlorine residual measuring apparatu and microbial detection ware, the water inlet at above-mentioned four dosing tank tops all communicates with reverse osmosis production water tank through the circulating pipe, the drain of bottom all communicates with the blow off pipe.
Because use sewage as reverse osmosis's source water, must use the germicide at the front end, otherwise reverse osmosis membrane can be polluted rapidly, can not the steady operation, so in above-mentioned technical scheme, chlorine-containing germicide dosing tank sets up before filtration equipment, the microbial biomass of water inlet can be controlled effectively to chlorine-containing germicide, because reverse osmosis equipment's membrane element can not resist the oxidation of chlorine, so, set up reductant dosing tank before reverse osmosis equipment, non-oxidizing germicide dosing tank is used for impact sterilization treatment, antisludging agent dosing tank is used for preventing that dirty stifled reverse osmosis membrane, the residual chlorine measuring apparatu is used for measuring the residual chlorine concentration in reverse osmosis water inlet, the microbial detection ware is used for measuring BFR the utility model discloses a product water diluted release medicament in the reverse osmosis product water tank can reduce impurity and get into reverse osmosis membrane equipment and cause the damage to reverse osmosis membrane.
Further, the pretreatment equipment is an anaerobic tank, an aerobic tank, a sedimentation tank, a pH adjusting tank or a homogenization tank; the filtering equipment is a sand filter, microfiltration equipment or ultrafiltration equipment.
Furthermore, water inlet valves are arranged on the circulating pipes at the water inlet positions at the tops of the four dosing tanks, and drain valves are arranged on the drain pipes at the drain positions at the bottoms of the four dosing tanks. The four dosing tanks share a circulating pipe and a sewage discharge pipe.
Furthermore, the four dosing boxes are communicated with the main pipeline through dosing pipes, each dosing pipe is provided with a control valve and a dosing pump, and the circulating pipe is provided with a suction pump.
Furthermore, the residual chlorine measuring instrument, the microorganism detector, the water inlet valve, the blow-down valve, the control valve, the dosing pump and the suction pump are all connected with the PLC control system, so that automatic control is realized.
Furthermore, the pretreatment device is connected with the raw water tank through a main pipeline, a raw water pump is installed on the main pipeline between the pretreatment device and the raw water tank, and the raw water pump is connected with the PLC control system.
Furthermore, stirring devices connected with the PLC control system are arranged in the four dosing boxes.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure, 1, a main pipeline; 2. a pre-treatment device; 3. a filtration device; 4. filtering the water producing tank; 5. a filtration concentrate tank; 6. reverse osmosis equipment; 7. a reverse osmosis water production tank; 8. a reverse osmosis concentrated water tank; 9. a chlorine-containing bactericide dosing tank; 10. a reductant dosing tank; 11. a non-oxidizing biocide dosing box; 12. a scale inhibitor dosing box; 13. a residual chlorine measuring instrument; 14. a microbial detector; 15. a water inlet; 16. a water inlet valve; 17. a circulation pipe; 18. a sewage draining outlet; 19. a blowoff valve; 20. a blow-off pipe; 21. a medicine feeding pipe; 22. a control valve; 23. a dosing pump; 24. a suction pump; 25. a PLC control system; 26. a raw water tank; 27. a raw water pump; 28. stirring device, 29, add medicine mouth.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
The reverse osmosis system capable of monitoring the microbial fouling degree in real time as shown in fig. 1 comprises a pretreatment device 2, a filtration device 3, a filtration water production tank 4, a reverse osmosis device 6 and a reverse osmosis water production tank 7 which are sequentially communicated through a main pipeline 1, wherein a dosing device, a residual chlorine measuring instrument 13 and a microbial detector 14 are further installed on the main pipeline 1, and the dosing device comprises a chlorine-containing bactericide dosing tank 9, a reducing agent dosing tank 10, a non-oxidative bactericide dosing tank 11 and a scale inhibitor dosing tank 12; wherein, a chlorine-containing bactericide dosing tank 9 is connected to the main pipeline between the pretreatment equipment 2 and the filtration equipment 3, a reducing agent dosing tank 10, a non-oxidative bactericide dosing tank 11, a scale inhibitor dosing tank 12, a residual chlorine measuring instrument 13 and a microorganism detector 14 are sequentially connected to the main pipeline between the filtration product water tank 4 and the reverse osmosis equipment 6 along the water flow direction, water inlets 15 at the tops of the four dosing tanks are communicated with the reverse osmosis product water tank 17 through circulating pipes 17, and a drain outlet 18 at the bottom is communicated with a drain pipe 20.
Specifically, the microbial detector may be an ATP fluorescence detector. ATP is ubiquitous in microorganisms, luciferase can promote the reaction between the luciferin and the ATP to form luciferin and emit fluorescence, the emitted fluorescence intensity is in a direct proportion relation with the quantity of the microorganisms, and the degree of the microbial contamination of the target to be detected can be known by testing the fluorescence intensity.
Specifically, add medicine mouth 29 has still been seted up at four medicine case tops for add the medicine to the medicine case, the utility model discloses a product water diluted release medicament in the reverse osmosis product water tank replaces running water diluted release medicament, can reduce impurity entering reverse osmosis membrane system, specifically, installs suction pump 24 on the circulating pipe 17 for pump the product water in the reverse osmosis product water tank to the configuration medicament in the medicine case.
Specifically, the filtering device 3 is further connected with a filtering concentrated water tank 5 for storing concentrated water generated after filtering by the filtering device; the reverse osmosis device 7 is also connected with a reverse osmosis concentrated water tank 8 for storing the concentrated water generated by the reverse osmosis device.
Specifically, the pretreatment apparatus may determine a feasible method according to the property of raw water, and generally includes an anaerobic tank, an aerobic tank, a sedimentation tank, a pH adjusting tank, a homogenization tank, etc., and may select a corresponding single or multiple treatment units according to the actual situation, for example, advanced oxidation, micro-electrolysis, activated carbon filtration, etc. The filtering equipment is a sand filter, microfiltration equipment or ultrafiltration equipment.
Specifically, in order to control the water adding and sewage discharging operations of the dosing boxes, water inlet valves 16 are arranged on the circulating pipes at the water inlet positions at the tops of the four dosing boxes, and sewage discharging valves 19 are arranged at the sewage discharging positions at the bottoms of the four dosing boxes.
Specifically, for the convenience of adding the medicine to the trunk line, four medicine adding boxes are all communicated with the trunk line 1 through medicine adding pipes 21 at the bottoms, and each medicine adding pipe 21 is provided with a control valve 22 and a medicine adding pump 23.
Preferably, in order to realize full-automatic control, the residual chlorine measuring instrument 13, the microorganism detector 14 and auxiliary equipment of the dosing device (including the water inlet valve 16, the blow-down valve 19, the control valve 22, the dosing pump 23 and the suction pump 24) are all connected with the PLC control system 25, the PLC control system 25 controls the start and stop of each component, the flow of each valve is preset, and the water inlet valve 16, the blow-down valve 19 and the control valve 22 are all selected from electromagnetic valves.
When specifically using, preprocessing equipment 2 is connected with former water tank 26 through trunk line 1, and installs former water pump 27 on the trunk line between the two, and former water pump 27 is connected with PLC control system 25.
Preferably, in order to ensure the uniformity of medicament dilution, stirring devices 28 connected with the PLC control system 25 are arranged inside the four dosing boxes, and the PLC control system controls the start and stop of the stirring devices.
The utility model discloses a theory of operation is: the raw water is firstly treated by a pretreatment device, and thenThen, adding a chlorine-containing bactericide into the filtered produced water through a chlorine-containing bactericide adding box, and using chlorine sterilization as a common method for killing microorganisms, wherein chlorine, hypochlorite and chlorine dioxide can be used for sterilization, and when the adding amount and the contact time are enough, the disinfectant can effectively control the microbial biomass of the inlet water; then, the substances such as microorganisms, suspended matters, colloids and the like in the water are removed before the reverse osmosis equipment through the treatment of the filtering equipment; because a membrane element of the reverse osmosis equipment cannot resist the oxidation of chlorine, chlorine sterilization can only be used for controlling microorganisms before the membrane and cannot be used for controlling microorganisms in the membrane, once the microorganisms enter the reverse osmosis membrane, biological pollution can be generated, dechlorination treatment needs to be carried out before the reverse osmosis equipment, and specifically, a reducing agent (the reducing agent can be sodium bisulfite) is added into water through a reducing agent adding box, so that residual chlorine is completely removed, and oxidizing substances in the water are reduced, so that the safe operation of the reverse osmosis membrane is ensured; the non-oxidizing bactericide (isothiazolinone can be selected) has no oxidizing property, is usually used for impact type sterilization treatment, has the characteristics of broad spectrum, high efficiency, low toxicity and the like, can kill most of microbes such as bacteria and fungi in water, can penetrate through biological mucosa in a reverse osmosis system to play a role in sterilization, can be directly used for sterilization in a reverse osmosis membrane, and has no damage to the reverse osmosis membrane, so that a non-oxidizing bactericide feeding box is arranged between a reducing agent feeding box and reverse osmosis equipment; the use of the two bactericides can effectively control the pollution of the reverse osmosis membrane system; the scale inhibitor is composed of organic phosphate, can be used for controlling scales such as carbonate scale, sulfate scale, calcium fluoride scale and the like, and preventing the reverse osmosis membrane from being blocked by the scale; the residual chlorine measuring instrument is used for measuring the residual chlorine concentration in the reverse osmosis inlet water, and if the residual chlorine concentration is unqualified, the addition amount of the bactericide or the addition amount of the reducing agent needs to be adjusted in time at the inlet water front end of the filtering equipment; the concentration of the microorganism can be measured by a microorganism detector, the measured index of the microbial mucosa Formation Rate (BFR) can be used for predicting the generation trend and the pollution degree of the biological pollution of the reverse osmosis system, reliable data are provided for economically and effectively preventing and controlling the biological pollution, and the BFR index can be better reflected in different biological pollutionThe sterilization effect on the reverse osmosis system under the pollution control condition can be used for evaluating the effectiveness of sterilization measures for pretreatment of reverse osmosis influent water, namely a BFR value (the unit is pg/cm)2Lower values of/d) indicate less microbial contamination, e.g., a BFR value of 1pg/cm2Less than d, the concentration is 1-5pg/cm for light pollution2At d, moderate contamination is at 5pg/cm2Above d, it is a serious pollution.
The above-described embodiments are merely illustrative of various embodiments of the present invention, which are described in detail and detail, but not intended to be interpreted as limitations on the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention.

Claims (7)

1. A reverse osmosis system capable of monitoring the microbial fouling degree in real time is characterized by comprising a pretreatment device (2), a filtration device (3), a filtration product water tank (4), a reverse osmosis device (6) and a reverse osmosis product water tank (7) which are communicated in sequence through a main pipeline (1), wherein a chlorine-containing bactericide dosing tank (9) is connected on the main pipeline between the pretreatment device and the filtration device, a reducing agent dosing tank (10), a non-oxidative bactericide dosing tank (11), a scale inhibitor dosing tank (12), a residual chlorine measuring instrument (13) and a microbial detector (14) are sequentially connected on the main pipeline between the filtration product water tank and the reverse osmosis device along the water flow direction, the water inlets (15) at the tops of the four dosing tanks are communicated with the reverse osmosis water production tank through circulating pipes (17), and the drain outlets (18) at the bottoms of the four dosing tanks are communicated with drain pipes (20).
2. A reverse osmosis system according to claim 1 wherein the pretreatment apparatus is an anaerobic tank, an aerobic tank, a sedimentation tank, a pH adjusting tank or a homogenization tank; the filtering equipment is a sand filter, microfiltration equipment or ultrafiltration equipment.
3. A reverse osmosis system capable of monitoring the blockage degree of microorganisms in real time according to claim 1, wherein water inlet valves (16) are arranged on the circulating pipes at the water inlet at the top of the four dosing tanks, and blowdown valves (19) are arranged on the blowdown pipes at the blowdown port at the bottom of the four dosing tanks.
4. A reverse osmosis system capable of monitoring the microbial fouling degree in real time according to claim 3, wherein four dosing tanks are communicated with the main pipeline through dosing pipes (21), each dosing pipe is provided with a control valve (22) and a dosing pump (23), and the circulating pipe is provided with a suction pump (24).
5. The reverse osmosis system capable of monitoring the microbial fouling degree in real time according to claim 4, wherein the residual chlorine measuring instrument, the microbial detector, the water inlet valve, the blowdown valve, the control valve, the dosing pump and the suction pump are connected with the PLC control system (25).
6. A reverse osmosis system capable of monitoring the microbial fouling degree in real time according to claim 5, wherein the pretreatment equipment is connected with a raw water tank (26) through a main pipeline, a raw water pump (27) is installed on the main pipeline between the pretreatment equipment and the raw water tank, and the raw water pump is connected with the PLC control system.
7. A reverse osmosis system capable of monitoring the microbial fouling degree in real time according to claim 5, wherein stirring devices (28) connected with a PLC control system are arranged inside each of the four dosing tanks.
CN201920586154.1U 2019-04-26 2019-04-26 Reverse osmosis system capable of monitoring microbial fouling degree in real time Active CN209906530U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113244765A (en) * 2021-06-10 2021-08-13 天津大学 Biomass blocking inhibitor and application thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113244765A (en) * 2021-06-10 2021-08-13 天津大学 Biomass blocking inhibitor and application thereof

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Address after: 100176 building 18-2, No. 2, Jingyuan North Street, Beijing Economic and Technological Development Zone, Daxing District, Beijing (Yizhuang group, high-end industrial area of Beijing Pilot Free Trade Zone)

Patentee after: Beijing Yizhuang Environmental Technology Group Co.,Ltd.

Address before: 100176 No. 5 Xihuan South Road, Daxing Economic and Technological Development Zone, Beijing

Patentee before: Beijing Yizhuang Water Co.,Ltd.

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