CN111362496A - Low-energy-consumption membrane-method antibiotic pharmaceutical wastewater recycling system and treatment process thereof - Google Patents
Low-energy-consumption membrane-method antibiotic pharmaceutical wastewater recycling system and treatment process thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/50—Treatment of water, waste water, or sewage by addition or application of a germicide or by oligodynamic treatment
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/343—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the pharmaceutical industry, e.g. containing antibiotics
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Abstract
The invention discloses a low-energy-consumption membrane method antibiotic pharmaceutical wastewater recycling system; the system comprises a wastewater secondary sedimentation tank, wherein the wastewater secondary sedimentation tank is connected with a recycling treatment system, and the recycling treatment system comprises an ultrafiltration membrane system communicated with the wastewater secondary sedimentation tank; the output end of the ultrafiltration membrane system is connected with a micron-sized filtering device; the output end of the micron-sized filtering device is connected with a nanofiltration membrane system, the low-energy-consumption membrane-method antibiotic pharmaceutical wastewater recycling system provided by the invention can carry out multiple physical filtering treatment on pharmaceutical wastewater through a recycling treatment system, and the consumption of various medicaments is reduced in each stage of treatment process; the whole recycling treatment system has the advantages of simple and compact structure, small occupied area, stable performance and better treated effluent effect, and realizes the purpose of efficient recycling treatment. Has high practical value.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a low-energy-consumption membrane method antibiotic pharmaceutical wastewater recycling system and a treatment process thereof.
Background
The waste water generated in the industrial production of pharmaceutical enterprises becomes one of the most serious and difficult-to-treat industrial waste water in China due to complex components, high organic matter content, high toxicity, deep chromaticity and high salt content, and particularly poor biodegradability. The existing pharmaceutical wastewater is generally treated by coagulating sedimentation, advanced oxidation, ozone catalytic oxidation, hydrolytic acidification and the like. The treated water still contains higher chroma, COD, hardness, salt content and the like. The traditional advanced oxidation treatment process is difficult to reach the recycling standard and needs higher operation cost, and a large amount of medicament and salt are added in the traditional process to bring great burden to the subsequent treatment, so that the exploration of a new process for treating and recycling the pharmaceutical wastewater is imperative. The process can replace the advanced oxidation step in the traditional process, reduce the operation cost of wastewater treatment and reuse and reduce the burden of subsequent treatment.
The invention CN201710362186.9 of China describes a high-concentration and difficult-degradation organic pharmaceutical wastewater treatment device and a treatment method. The invention adopts a mode of physicochemical treatment, advanced oxidation, hydrolytic acidification and TIC anaerobic reaction tower to treat the high-concentration organic wastewater, so as to remove a large amount of COD, BOD5, SS and the like in the water; the method is characterized in that physicochemical pretreatment is adopted for low-concentration organic wastewater, the biodegradability of the wastewater is increased, and then the high-concentration organic wastewater and the low-concentration organic wastewater enter an A/O process, a secondary sedimentation tank, a reaction tank, a final sedimentation tank and a clean water tank to remove ammonia nitrogen in water and the like until the wastewater reaches the discharge standard. In the implementation process of the process, chemical agents such as sodium hydroxide, sulfuric acid, hydrogen peroxide, ferric sulfate, ferrous sulfate and the like need to be added, and the process flow is complex and the operation is complicated. Although the emission standard can be met, the subsequent treatment is greatly burdened, and nowadays water resources are increasingly in short supply, a large amount of water resource emission causes resource waste.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a low-energy-consumption membrane method antibiotic pharmaceutical wastewater recycling system which can improve the wastewater treatment efficiency, reduce the wastewater treatment energy consumption and achieve the purpose of reducing the recycling treatment cost.
The technical scheme adopted by the invention is as follows: a low-energy-consumption membrane method antibiotic pharmaceutical wastewater recycling system; the system comprises a wastewater secondary sedimentation tank, wherein the wastewater secondary sedimentation tank is connected with a recycling treatment system, and the recycling treatment system comprises an ultrafiltration membrane system communicated with the wastewater secondary sedimentation tank; the output end of the ultrafiltration membrane system is connected with a micron-sized filtering device; the output end of the micron-sized filtering device is connected with a nanofiltration membrane system, the permeate output end of the nanofiltration membrane system is connected with a reuse water tank, and the concentrate output end of the nanofiltration membrane system is connected with a concentrate water tank; the water outlet of the concentrated solution water tank is connected with a DTRO device; the permeate liquid output end of the DTRO device is connected to a reuse water tank, and the concentrated liquid output end of the DTRO device is connected with an evaporation treatment system.
In the technical scheme: the biochemical wastewater can be subjected to multiple physical filtration treatment through the recycling treatment system, specifically, the wastewater is subjected to physical filtration separation sequentially through an ultrafiltration membrane system, a micron-grade filtration device, a nanofiltration membrane system and a DTRO device of the recycling treatment system, so that the consumption of various medicaments is reduced in each stage of treatment process, compared with the traditional treatment process, the treatment process is reduced while the treatment effect is ensured, and the operation cost of the pharmaceutical wastewater treatment process is greatly reduced; the whole recycling treatment system has the advantages of simple and compact structure, small occupied area, stable performance and better treated effluent effect, and realizes the purpose of efficient recycling treatment.
Preferably, the water outlet end of the wastewater secondary sedimentation tank is connected with an ultrafiltration booster pump connected with the input end of the ultrafiltration membrane system.
Preferably, the input end of the ultrafiltration membrane system is provided with a first dosing port, and the first dosing port is connected with a first dosing and mixing device.
Preferably, the ultrafiltration membrane system is also connected with a fan aeration device.
Preferably, an ultrafiltration system water producing tank is arranged between the output end of the ultrafiltration membrane system and the micron-sized filter device, an ultrafiltration water producing pump is connected between a water inlet of the ultrafiltration system water producing tank and the output end of the ultrafiltration membrane system, and a nanofiltration system booster pump is connected between the input end of the micron-sized filter device and a water outlet of the ultrafiltration system water producing tank.
Preferably, the input end of the micron-sized filtering device is provided with a second dosing port on a pipeline between the input end of the micron-sized filtering device and the booster pump of the nanofiltration system, and the second dosing port is connected with a second dosing and mixing device.
Preferably, a nanofiltration system high-pressure pump is arranged between the output end of the micron-sized filtering device and the nanofiltration membrane system.
Preferably, a circulation reflux device is arranged in the nanofiltration membrane system and is connected to a pipeline between the output end of the nanofiltration membrane system and the high-pressure pump of the nanofiltration system.
Preferably, a DTRO booster pump is arranged between the output end of the concentrated solution water tank and the concentrated solution input end of the DTRO device.
The invention also aims to provide a treatment process of the antibiotic pharmaceutical wastewater recycling system by using the low-energy-consumption membrane method; can shorten the process treatment flow and improve the wastewater treatment efficiency, and comprises the following treatment steps:
s1, wastewater pretreatment: antibiotic pharmacy waste water passes through into the secondary pond of sinking of waste water of water inlet pipeline input, and antibiotic pharmacy waste water carries out the water yield buffering in the secondary pond of sinking of waste water, even quality of water.
S2, ultrafiltration filtration treatment: antibiotic pharmacy waste water passes through the ultrafiltration booster pump and gets into ultrafiltration membrane system, and the first medicine mixing arrangement that is connected with first medicine mouth adds the medicament that prevents bacterial growing in to pharmacy waste water, lets in the air in to ultrafiltration membrane system by fan aeration equipment simultaneously, and the macromolecule COD in the waste water is got rid of to the ultrafiltration membrane system, and the product water of partial colourity, turbidity, suspended solid impurity and fine particle etc. is carried to ultrafiltration system product water pool through ultrafiltration product water pump and is collected.
S3, micron-sized filtering treatment: the antibiotic pharmaceutical wastewater is output after being buffered and regulated in a water producing tank of the ultrafiltration system and is conveyed into the micron-sized filtering device through a booster pump of the nanofiltration system for filtering treatment, and a medicament for preventing scaling and bacteria generation is added into the wastewater by the second medicament adding and mixing device before being input into the micron-sized filtering device for filtering.
S4, nano-filtration membrane system treatment: after the antibiotic pharmaceutical wastewater is filtered, treated and output by the micron-sized filtering device, the wastewater enters the nanofiltration membrane system after being boosted by the high-pressure pump of the nanofiltration system, the nanofiltration membrane system is used for concentrating and separating the wastewater, part of concentrated solution can be circularly concentrated in the nanofiltration membrane system under the circulating action of the circulating reflux device, the concentrated solution after being circularly concentrated by the nanofiltration membrane system enters the concentrated solution water tank for collection, and the permeate of the nanofiltration membrane system is collected in the reuse water tank.
S5, DTRO device processing: and the concentrated solution of the nanofiltration membrane system is collected to a concentrated solution water tank, the output of the concentrated solution water tank is lifted by a DTRO booster pump and then enters a DTRO device for concentration, the permeate liquid treated by the DTRO device is input into a reuse water tank, and the concentrated solution treated by the DTRO device is input into an evaporation treatment system for zero emission treatment.
For the treatment and recycling problems of the antibiotic pharmaceutical wastewater, the process treatment can replace the original processes such as advanced oxidation, CASS, catalytic oxidation and the like, reduce the consumption of a large amount of medicaments, greatly reduce the burden of subsequent treatment and save the investment and the operation cost of subsequent equipment to the maximum extent.
The invention has the beneficial effects that: the low-energy-consumption membrane-method antibiotic pharmaceutical wastewater recycling system provided by the invention can be used for carrying out multiple physical filtration treatment on pharmaceutical wastewater through the recycling treatment system, so that the consumption of various medicaments is reduced in each stage of treatment process; the whole recycling treatment system has the advantages of simple and compact structure, small occupied area, stable performance and better treated effluent effect, and realizes the purpose of efficient recycling treatment. Compared with the traditional treatment process, the novel treatment process of the low-energy-consumption membrane method antibiotic pharmaceutical wastewater recycling system shortens the process treatment flow, reduces the treatment flow while ensuring the treatment effect, greatly reduces the operation cost of the pharmaceutical wastewater treatment process, does not add a large amount of medicaments in the treatment process, solves the problem of ultrahigh operation cost of the processes such as high-grade oxidation and the like in the traditional process, and has higher practical value.
Drawings
In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.
Fig. 1 is a schematic structural diagram of a low-energy membrane method antibiotic pharmaceutical wastewater recycling system according to an embodiment of the present invention.
Fig. 2 is a process flow diagram of a low-energy membrane method antibiotic pharmaceutical wastewater recycling system according to a second embodiment of the present invention.
Reference numerals: the device comprises a wastewater secondary sedimentation tank 1, an ultrafiltration booster pump 2, a first chemical adding mixing device 3, an ultrafiltration membrane system 4, a fan aeration device 5, an ultrafiltration water producing pump 6, an ultrafiltration system water producing tank 7, a nanofiltration system booster pump 8, a second chemical adding mixing device 9, a micron-sized filtering device 10, a nanofiltration system high-pressure pump 11, a nanofiltration membrane system 12, a concentrated solution tank 13, a DTRO booster pump 14, a DTRO device 15 and a reuse water tank 16.
Detailed Description
Here, it is to be noted that the functions, methods, and the like related to the present invention are only conventional adaptive applications of the prior art. The description of the present invention as to functions and methods is provided for better illustration and understanding of the present invention.
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.
It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.
Referring to fig. 1, the present embodiment provides a system for recycling antibiotic pharmaceutical wastewater by using a low energy consumption membrane method; comprises a wastewater secondary sedimentation tank 1, wherein the wastewater secondary sedimentation tank 1 is connected with a recycling treatment system, and biochemical wastewater can be subjected to multiple physical filtration treatment through the recycling treatment system. The recycling treatment system comprises an ultrafiltration membrane system 4 communicated with the wastewater secondary sedimentation tank 1; the output end of the ultrafiltration membrane system 4 is connected with a micron-sized filtering device 10; the output end of the micron-sized filtering device 10 is connected with a nanofiltration membrane system 12, the permeate output end of the nanofiltration membrane system 12 is connected with a reuse water tank 16, and the concentrated solution output end of the nanofiltration membrane system 12 is connected with a concentrated solution water tank 13; the water outlet of the concentrated solution water tank 13 is connected with a DTRO device 15; the permeate liquid output end of the DTRO device 15 is connected to the reuse water tank 16, and the concentrated liquid output end of the DTRO device 15 is connected to an evaporation treatment system.
As shown in fig. 1, since the antibiotic pharmaceutical wastewater contains a large amount of refractory macromolecules COD, very high chromaticity, and high hardness and salt content, in this embodiment, the secondary wastewater sedimentation tank 1 is used for collecting the antibiotic pharmaceutical wastewater before treatment, and can play a role in buffering and regulating water amount, and the buffered antibiotic pharmaceutical wastewater is physically filtered and separated by the ultrafiltration membrane system 4, the micron-sized filtration device 10, the nanofiltration membrane system 12, and the DTRO device 15 in sequence. Wherein, because milipore filter system 4 includes anti-pollution milipore filter membrane component, can get rid of the macromolecule COD in the waste water when milipore filter system 4 handles, partial colourity, turbidity, suspended solid impurity and fine particle etc. and micron order filter equipment 10 can carry out micron order filtration processing by water waste water. In addition, the nanofiltration membrane system 12 comprises a high-pressure nanofiltration membrane shell and a high-pressure-resistant anti-pollution nanofiltration membrane element, the nanofiltration membrane system 12 generates permeate and concentrate after treating wastewater, and the permeate after treatment by the nanofiltration membrane system 12 can be input into a reuse water tank 16 for reuse or other advanced treatment for the produced water after removing COD, chromaticity, turbidity, hardness and partial salt content; the recovery rate of the nanofiltration membrane system 12 to the wastewater can reach more than 80 percent, and under the action of the high recovery rate of the nanofiltration membrane system 12, the subsequent concentrated water can be greatly reduced, and the investment and the operation cost of subsequent continuous treatment and evaporative crystallization can be saved to the maximum extent. The concentrated solution of the nanofiltration membrane system 12 contains a large amount of concentrated COD, chromaticity, turbidity, hardness and salt content, and can be treated by the DTRO device 15, the concentrated solution generated by the DTRO device 15 can be evaporated by the evaporation treatment system, and the permeate generated by the DTRO device 15 is input into the reuse water tank 16 for reuse or other advanced treatment.
As shown in fig. 1, the consumption of various medicaments is reduced in the treatment process through the ultrafiltration membrane system 4, the micron-sized filtration device 10 and the nanofiltration membrane system 12, compared with the traditional treatment process, the treatment process is reduced while the treatment effect is ensured, and the operation cost of the pharmaceutical wastewater treatment process is greatly reduced; the whole recycling treatment system has the advantages of simple and compact structure, small occupied area, stable performance and better treated effluent effect, and realizes the purpose of efficient recycling treatment.
As shown in fig. 1, the ultrafiltration membrane system 4 can separate polymer colloids or suspended particles with a certain size from a solution in an ultrafiltration process, in this embodiment, an outlet end of the wastewater secondary sedimentation tank 1 is connected with an ultrafiltration booster pump 2 connected with an input end of the ultrafiltration membrane system 4, and the ultrafiltration booster pump 2 can increase wastewater pressure, thereby improving a treatment effect of the ultrafiltration membrane system 4.
As shown in fig. 1, in order to prevent the bacteria from breeding in the wastewater treatment process, a first chemical adding port is arranged at the input end of the ultrafiltration membrane system 4 in the embodiment, and the first chemical adding port is connected with a first chemical adding and mixing device 3. The first dosing and mixing device 3 can add bacteria into the wastewater to prevent the bacteria from breeding and improve the effluent quality of the ultrafiltration membrane system 4. In this embodiment, the chemicals and the waste water are mixed uniformly by the pipeline mixer.
As shown in fig. 1, the ultrafiltration membrane system 4 is further connected with a fan aeration device 5. The fan aeration device 5 can convey air to the ultrafiltration membrane system 4 to carry out aeration treatment on the wastewater, and can carry out aeration treatment on the wastewater entering the membrane tank of the ultrafiltration membrane system 4, so that the treatment effect on the wastewater can be improved.
In this embodiment, the wastewater after being treated by the ultrafiltration membrane system 4 needs to be buffered and adjusted to improve the subsequent treatment effect, an ultrafiltration system water production tank 7 is arranged between the output end of the ultrafiltration membrane system 4 and the micron-sized filter device 10, an ultrafiltration water production pump 6 is connected between the water inlet of the ultrafiltration system water production tank 7 and the output end of the ultrafiltration membrane system 4, and a nanofiltration system booster pump 8 is connected between the input end of the micron-sized filter device 10 and the water outlet of the ultrafiltration system water production tank 7. The wastewater output by the ultrafiltration system water production tank 7 is pressurized by a nanofiltration system booster pump 8 and then can be input into a micron-sized filtering device 10 for micron-sized filtering treatment.
As shown in fig. 1, in front of the micron-scale filtration treatment device, in order to prevent the wastewater from breeding bacteria, a second chemical adding port is arranged on a pipeline between the input end of the micron-scale filtration device 10 and the nanofiltration system booster pump 8, and the second chemical adding port is connected with a second chemical adding and mixing device 9. The second dosing and mixing device 9 can be used for adding the water into the wastewater to prevent bacteria from breeding and improve the quality of the discharged water. In this embodiment, the chemicals and the waste water are mixed uniformly by the pipeline mixer.
As shown in fig. 1, before the wastewater is treated by the nanofiltration membrane system 12, the wastewater needs to be pressurized, and in this embodiment, a nanofiltration system high-pressure pump 11 is disposed between the output end of the micron-scale filtration apparatus 10 and the nanofiltration membrane system 12. The pressurizing range of the nanofiltration membrane system 12 high-pressure pump is 1 MPa-4 MPa, and the pressurized wastewater can be efficiently recycled.
As shown in fig. 1, the present embodiment further includes a circulation reflux device in the nanofiltration membrane system 12, and the circulation reflux device is connected to a pipeline between the output end of the nanofiltration membrane system 12 and the high-pressure pump 11 of the nanofiltration system. Like this, nanofiltration membrane system 12 can divide into one section or two sections concentration and separation according to waste water quality, and circulation reflux unit circulates in order to increase the cross-flow volume in nanofiltration membrane system 12 with the concentrate part in nanofiltration membrane system 12, strengthens its antipollution ability.
As shown in fig. 1, a DTRO booster pump 14 is provided between the output of the concentrate tank 13 and the concentrate input of the DTRO device 15. The DTRO device 15 booster pump can lift the waste water to the DTRO device 15 for subsequent concentration treatment and evaporation treatment, thereby achieving the purpose of zero emission treatment.
Example two
The invention also aims to provide a treatment process of the antibiotic pharmaceutical wastewater recycling system by using the low-energy-consumption membrane method; can shorten the process treatment flow and improve the wastewater treatment efficiency, and comprises the following treatment steps:
step 1, wastewater pretreatment: antibiotic pharmacy waste water passes through into the secondary pond of sinking of waste water of water inlet pipeline input, and antibiotic pharmacy waste water carries out the water yield buffering in the secondary pond of sinking of waste water, even quality of water. In the step 1, the salt content of the inlet water of the pharmaceutical wastewater is 10000 mg/L-30000 mg/L.
Step 2, ultrafiltration treatment: antibiotic pharmacy waste water passes through the ultrafiltration booster pump and gets into ultrafiltration membrane system, and the first medicine mixing arrangement who is connected with first medicine mouth adds the medicament that prevents bacterial growing in to pharmacy waste water, lets in the air in to ultrafiltration membrane system by fan aeration equipment simultaneously, and the macromolecule COD in the waste water is got rid of to the ultrafiltration membrane system, and partial colourity, turbidity, suspended solid impurity and fine particle etc.. Conveying the produced water of the ultrafiltration membrane system to a water producing pool of the ultrafiltration system through an ultrafiltration water producing pump for collection;
and 3, micron-sized filtering treatment: the antibiotic pharmaceutical wastewater is buffered and regulated in the water production tank of the ultrafiltration system, then is output and is conveyed into the micron-sized filtering device through the booster pump of the nanofiltration system for filtering treatment, and a medicament for preventing scaling and bacteria generation is added into the wastewater by the second medicament adding and mixing device before being input into the micron-sized filtering device for filtering;
and step 4, treating the nanofiltration membrane system: after the wastewater is filtered, treated and output by a micron-sized filtering device, the wastewater enters a nanofiltration membrane system after being boosted by a high-pressure pump of the nanofiltration system, the wastewater is concentrated and separated by the nanofiltration membrane system, and the recovery rate of the nanofiltration membrane system can reach more than 80%; under the circulation action of the circulation reflux device, part of concentrated solution can be circularly concentrated in the nanofiltration membrane system, the concentrated solution circularly concentrated by the nanofiltration membrane system enters a concentrated solution water pool to be collected, and permeate of the nanofiltration membrane system is collected in a reuse water pool;
Through the process treatment, the original processes such as advanced oxidation, CASS, catalytic oxidation and the like are replaced, the consumption of a large amount of medicaments is reduced, and the investment cost and the operation cost are saved to the maximum extent. The subsequent concentrated water quantity can be greatly reduced, and the investment and the operation cost of subsequent continuous treatment and evaporative crystallization are saved to the maximum extent. The treatment process can greatly reduce the burden of subsequent treatment and save the investment and the operation cost of subsequent equipment to the maximum extent.
In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
Claims (10)
1. A low-energy-consumption membrane method antibiotic pharmaceutical wastewater recycling system; including waste water two heavy pond (1), waste water two heavy pond (1) is connected with recycling treatment system, its characterized in that:
the recycling treatment system comprises an ultrafiltration membrane system (4) communicated with the wastewater secondary sedimentation tank (1); the output end of the ultrafiltration membrane system (4) is connected with a micron-sized filtering device (10);
the output end of the micron-sized filtering device (10) is connected with a nanofiltration membrane system (12), the permeate output end of the nanofiltration membrane system (12) is connected with a reuse water tank (16), and the concentrated solution output end of the nanofiltration membrane system (12) is connected with a concentrated solution water tank (13); the water outlet of the concentrated solution water tank (13) is connected with a DTRO device (15);
the permeate liquid output end of the DTRO device (15) is connected to a reuse water tank (16), and the concentrated liquid output end of the DTRO device (15) is connected with an evaporation treatment system.
2. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 1; the method is characterized in that: the water outlet end of the waste water secondary sedimentation tank (1) is connected with an ultrafiltration booster pump (2) connected with the input end of an ultrafiltration membrane system (4).
3. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 1; the method is characterized in that: the input end of the ultrafiltration membrane system (4) is provided with a first dosing port, and the first dosing port is connected with a first dosing mixing device (3).
4. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 1; the method is characterized in that: the ultrafiltration membrane system (4) is also connected with a fan aeration device (5).
5. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 1; the method is characterized in that: be equipped with ultrafiltration system between ultrafiltration membrane system (4) output and micron order filter equipment (10) and produce pond (7), be connected with the ultrafiltration between the water inlet of ultrafiltration system product pond (7) and ultrafiltration membrane system (4) output and produce water pump (6), be connected with between the input of micron order filter equipment (10) and ultrafiltration system product pond (7) delivery port and receive and strain system booster pump (8).
6. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 5; the method is characterized in that: the input end of the micron-sized filtering device (10) is provided with a second dosing port on a pipeline between the input end and the nanofiltration system booster pump (8), and the second dosing port is connected with a second dosing and mixing device (9).
7. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 5; the method is characterized in that: a nanofiltration system high-pressure pump (11) is arranged between the output end of the micron-sized filtering device (10) and the nanofiltration membrane system (12).
8. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 7; the method is characterized in that: a circulating reflux device is arranged in the nanofiltration membrane system (12) and is connected to a pipeline between the output end of the nanofiltration membrane system (12) and the high-pressure pump (11) of the nanofiltration system.
9. The low energy consumption membrane method antibiotic pharmaceutical wastewater recycling system of claim 1; the method is characterized in that: and a DTRO booster pump (14) is arranged between the output end of the concentrated solution water tank (13) and the concentrated solution input end of the DTRO device (15).
10. A treatment process utilizing the low-energy-consumption membrane-method antibiotic pharmaceutical wastewater recycling system of any one of claims 1 to 9; the method comprises the following processing steps:
s1, wastewater pretreatment: the antibiotic pharmaceutical wastewater is input into the wastewater secondary sedimentation tank (1) through a water inlet pipeline, and the water quantity of the antibiotic pharmaceutical wastewater is buffered in the wastewater secondary sedimentation tank (1) to uniform the water quality;
s2, ultrafiltration filtration treatment: antibiotic pharmaceutical wastewater enters an ultrafiltration membrane system (4) through an ultrafiltration booster pump (2), a first dosing mixing device (3) connected with a first dosing port adds a medicament for preventing bacterial growth into the pharmaceutical wastewater, and air is introduced into the ultrafiltration membrane system (4) through a fan aeration device (5), the macromolecular COD in the wastewater is removed by the ultrafiltration membrane system (4), and the produced water after partial chromaticity, turbidity, suspended matter impurities and fine particles is conveyed to a water production tank (7) of the ultrafiltration system through an ultrafiltration water production pump (6) to be collected;
s3, micron-sized filtering treatment: the antibiotic pharmaceutical wastewater is buffered and regulated in a water production tank (7) of an ultrafiltration system, then is output and is conveyed into a micron-sized filtering device (10) through a booster pump (8) of a nanofiltration system for filtering treatment, and a medicament for preventing scaling and bacteria generation is added into the wastewater by a second medicament adding and mixing device (9) before being input into the micron-sized filtering device (10) for filtering;
s4, nano-filtration membrane system treatment: after the antibiotic pharmaceutical wastewater is filtered, treated and output by a micron-sized filtering device (10), the wastewater is boosted by a high-pressure pump (11) of a nanofiltration system and then enters a nanofiltration membrane system (12), the nanofiltration membrane system (12) is used for concentrating and separating the wastewater, part of concentrated solution can be circularly concentrated in the nanofiltration membrane system (12) under the circulating action of a circulating reflux device, the concentrated solution circularly concentrated by the nanofiltration membrane system (12) enters a concentrated solution water tank (13) for collection, and the permeate of the nanofiltration membrane system (12) is collected in a reuse water tank (16);
s5, the DTRO device (15) processes: the concentrated solution of the nanofiltration membrane system (12) is collected to a concentrated solution water tank (13), the output of the concentrated solution water tank (13) is lifted by a DTRO booster pump (14) and then enters a DTRO device (15) for concentration, the permeate liquid treated by the DTRO device (15) is input into a reuse water tank (16), and the concentrated solution treated by the DTRO device (15) is input into an evaporation treatment system for zero emission treatment.
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