CN110697963A - Method and system for treating biochemical wastewater evaporative crystallization zero mother liquor - Google Patents
Method and system for treating biochemical wastewater evaporative crystallization zero mother liquor Download PDFInfo
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- CN110697963A CN110697963A CN201911093910.8A CN201911093910A CN110697963A CN 110697963 A CN110697963 A CN 110697963A CN 201911093910 A CN201911093910 A CN 201911093910A CN 110697963 A CN110697963 A CN 110697963A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 74
- 239000012452 mother liquor Substances 0.000 title claims abstract description 59
- 238000002425 crystallisation Methods 0.000 title claims abstract description 44
- 230000008025 crystallization Effects 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 19
- 239000012528 membrane Substances 0.000 claims abstract description 75
- 238000001223 reverse osmosis Methods 0.000 claims abstract description 66
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 61
- 238000001704 evaporation Methods 0.000 claims abstract description 18
- 238000001914 filtration Methods 0.000 claims abstract description 10
- 150000003839 salts Chemical class 0.000 claims abstract description 10
- 238000000108 ultra-filtration Methods 0.000 claims abstract description 9
- 238000001556 precipitation Methods 0.000 claims abstract description 8
- 239000013505 freshwater Substances 0.000 claims description 18
- ONIBWKKTOPOVIA-UHFFFAOYSA-N Proline Chemical compound OC(=O)C1CCCN1 ONIBWKKTOPOVIA-UHFFFAOYSA-N 0.000 claims description 16
- 239000000463 material Substances 0.000 claims description 13
- 230000008020 evaporation Effects 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000012535 impurity Substances 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 238000005352 clarification Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010413 mother solution Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000011345 viscous material Substances 0.000 description 1
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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
-
- 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
-
- 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
-
- 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
-
- 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
-
- 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
- C02F2001/007—Processes including a sedimentation step
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/043—Treatment of partial or bypass streams
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to a method and a system for treating biochemical wastewater evaporative crystallization zero mother liquor, wherein the method and the system for treating biochemical wastewater evaporative crystallization zero mother liquor comprise the following steps: the biochemical wastewater is subjected to precipitation, filtration and ultrafiltration in sequence, and then is subjected to primary concentration by a section of reverse osmosis membrane to obtain a section of concentrated water; concentrating the first-stage concentrated water by a second-stage reverse osmosis membrane to obtain second-stage concentrated water; concentrating the second-stage concentrated water by a third-stage reverse osmosis membrane to obtain third-stage concentrated water; evaporating and crystallizing the three sections of concentrated water to generate mother liquor and separate out miscellaneous salts; the mother liquor flows back to the biochemical wastewater. The method and the system for treating the biochemical wastewater evaporative crystallization zero mother liquor can realize the discharge of the zero mother liquor and greatly save the production cost.
Description
Technical Field
The invention particularly relates to a method and a system for treating biochemical wastewater evaporative crystallization zero mother liquor.
Background
The traditional zero-emission process generates a large amount of mother liquor, has large investment for treating the mother liquor and high operation cost (referring to a mother liquor drying scheme), and simultaneously influences the crystallization quality. The COD content of the biochemical wastewater is 60-100mg/L, the TDS content is about 2000-4000mg/L, the biochemical wastewater is subjected to clarification filtration and RO concentration by 10-20 times, the COD content of concentrated water is 400-1000mg/L for evaporation crystallization, the crystallization is concentrated to the COD content of 1-20000mg/L, mother liquor must be discharged and becomes non-crystallized viscous substances, the total amount of the mother liquor is equivalent to that of crystallized miscellaneous salts, only about 70 percent of the salts form crystals, and the rest 30 percent of the salts can be treated separately. The mother liquor is dried or treated by hazardous wastes, and the occupied area, investment and operation cost of the mother liquor are quite large, so that the mother liquor is a heavy economic burden and an operation burden of a zero-emission enterprise.
Therefore, a method for treating biochemical wastewater evaporation crystallization zero mother liquor is needed.
Disclosure of Invention
The invention aims to provide a method and a system for treating zero mother liquor of biochemical wastewater evaporative crystallization, so as to realize the discharge of the zero mother liquor.
In order to solve the technical problem, the invention provides a method for treating biochemical wastewater evaporative crystallization zero mother liquor, which comprises the following steps:
the biochemical wastewater is subjected to precipitation, filtration and ultrafiltration in sequence, and then is subjected to primary concentration by a section of reverse osmosis membrane to obtain a section of concentrated water;
concentrating the first-stage concentrated water by a second-stage reverse osmosis membrane to obtain second-stage concentrated water;
concentrating the second-stage concentrated water by a third-stage reverse osmosis membrane to obtain third-stage concentrated water;
evaporating and crystallizing the three sections of concentrated water to generate mother liquor and separate out miscellaneous salts;
the mother liquor flows back to the biochemical wastewater.
Further, the section of reverse osmosis membrane is an ED membrane;
concentrating a section of fresh water generated by concentrating the ED membrane through an HPRO membrane;
and the concentrated water concentrated by the HPRO membrane flows back to the biochemical wastewater.
Further, the second-stage reverse osmosis membrane is a material membrane;
and two sections of fresh water generated by the concentration of the material membrane flow back to the biochemical wastewater.
Further, the three sections of reverse osmosis membranes are UHPRO membranes.
In another aspect, the present invention further provides a system for treating zero mother liquor of biochemical wastewater evaporative crystallization, comprising:
the device comprises a pretreatment device, a first-stage reverse osmosis device, a second-stage reverse osmosis device, a third-stage reverse osmosis device and an evaporative crystallization device;
the pretreatment device is suitable for treating biochemical wastewater, and the pretreated biochemical wastewater enters a first-stage reverse osmosis device for concentration;
the first-stage concentrated water generated by the concentration of the first-stage reverse osmosis device enters a second-stage reverse osmosis device for secondary concentration;
the second-stage concentrated water generated by the concentration of the second-stage reverse osmosis device enters a third-stage reverse osmosis device for tertiary concentration;
the evaporation crystallization device is suitable for evaporating and crystallizing three sections of concentrated water generated by concentration of the three sections of reverse osmosis devices, and mother liquor generated by the evaporation crystallization device flows back to the water inlet pipe of biochemical wastewater.
Further, the first section of reverse osmosis device is an ED membrane;
a section of fresh water generated by the concentration of the ED membrane enters an HPRO membrane for concentration;
and the concentrated water concentrated by the HPRO membrane flows back to the water inlet pipe of the biochemical wastewater.
Further, the two-stage reverse osmosis device is a material membrane;
and two sections of fresh water generated by the concentration of the material membrane flow back to the water inlet pipe of the biochemical wastewater.
Further, the three-section reverse osmosis device is a UHPRO membrane.
The method and the system for treating the zero mother liquor of the biochemical wastewater evaporative crystallization have the advantages that the biochemical wastewater is subjected to precipitation, filtration and ultrafiltration in sequence, and is subjected to evaporative crystallization after being concentrated for three times by the reverse osmosis membrane, so that the impurities such as COD (chemical oxygen demand) and TDS (total dissolved solids) in the biochemical wastewater can be effectively removed, a small amount of generated mother liquor is recycled into the biochemical wastewater, the zero mother liquor is discharged, and a large amount of operation cost is saved for enterprises.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a process diagram of the present invention for treating a zero mother liquid of biochemical waste water evaporative crystallization;
FIG. 2 is a schematic diagram of the system for treating the biochemical wastewater evaporative crystallization zero mother liquor of the present invention.
In the figure:
biochemical wastewater 1, a pretreatment device 2, a first-stage reverse osmosis device 3, an HPRO membrane 4, a second-stage reverse osmosis device 5, a third-stage reverse osmosis device 6, an evaporative crystallization device 7 and mother liquor 8.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
FIG. 1 is a process diagram of the present invention for treating a zero mother liquid of biochemical waste water evaporative crystallization;
as shown in fig. 1, this embodiment provides a method for treating a biochemical wastewater evaporative crystallization zero mother liquor, including: the biochemical wastewater 1 is subjected to precipitation, filtration and ultrafiltration in sequence, and then is subjected to primary concentration by a section of reverse osmosis membrane to obtain a section of concentrated water; concentrating the first-stage concentrated water by a second-stage reverse osmosis membrane to obtain second-stage concentrated water; concentrating the second-stage concentrated water by a third-stage reverse osmosis membrane to obtain third-stage concentrated water; evaporating and crystallizing the three sections of concentrated water to generate a mother solution 8 and separating out miscellaneous salts; the mother liquor 8 flows back to the biochemical wastewater 1. Biochemical waste water 1 is through deposiing in proper order, filtering and ultrafiltration back, evaporation crystallization after the cubic of rethread reverse osmosis membrane is concentrated, can effectively get rid of impurity such as COD, TDS in biochemical waste water 1, and the little mother liquor 8 that produces returns in biochemical waste water 1 to realize the emission of zero mother liquor, avoided the economic pressure that the mother liquor was handled and is brought.
Optionally, the first section of reverse osmosis membrane is an ED membrane; a section of fresh water generated by the concentration of the ED membrane is concentrated by an HPRO membrane 4; and the concentrated water concentrated by the HPRO membrane 4 flows back to the biochemical wastewater 1. Through the preliminary concentration of ED membrane, get rid of the salinity, the more and thoughtlessly impurity of one section fresh water volume that the ED membrane concentration produced carries out the concentration through HPRO membrane 4, but the fresh water recycle of concentration production, the dense water backward flow that the concentration produced continues to handle in biochemical waste water 1 to improve the impurity clearance.
Optionally, the second-stage reverse osmosis membrane is a material membrane; and two sections of fresh water generated by the concentration of the material membrane flow back to the biochemical wastewater 1. After the first section of concentrated water is concentrated by the material membrane, the removal rate of COD can reach 80% -90%, and impurities in the biochemical wastewater 1 are effectively removed, so that the discharge of pollutants is reduced.
Optionally, the three-section reverse osmosis membrane is a UHPRO membrane. After the two-stage concentrated water is concentrated by the UHPRO membrane, the generated three-stage concentrated water is evaporated and crystallized to separate out impurity salt, and the generated three-stage fresh water can be recycled. Evaporative crystallization can produce a small amount of mother liquor 8, carries out new round of processing with mother liquor 8 backward flow to biochemical waste water 1 in, has avoided needing to carry out drying or the useless processing of danger to mother liquor 8, has also avoided causing heavy economic burden and the operation burden of enterprise.
Example 2
FIG. 2 is a schematic diagram of the system for treating the biochemical wastewater evaporative crystallization zero mother liquor of the present invention.
As shown in fig. 2, on the basis of embodiment 1, this embodiment provides a system for treating biochemical wastewater evaporative crystallization zero mother liquor, which includes: the device comprises a pretreatment device 2, a first-stage reverse osmosis device 3, a second-stage reverse osmosis device 5, a third-stage reverse osmosis device 6 and an evaporative crystallization device 7; the pretreatment device 2 is suitable for treating the biochemical wastewater 1, and the pretreated biochemical wastewater 1 enters a section of reverse osmosis device 3 for concentration; the first-stage concentrated water generated by the concentration of the first-stage reverse osmosis device 3 enters a second-stage reverse osmosis device 5 for secondary concentration; the second-stage concentrated water generated by the concentration of the second-stage reverse osmosis device 5 enters a third-stage reverse osmosis device 6 for the third concentration; the evaporative crystallization device 7 is suitable for evaporating and crystallizing three sections of concentrated water generated by concentration of the three sections of reverse osmosis devices 6, and mother liquor 8 generated by the evaporative crystallization device 7 flows back to the water inlet pipe of the biochemical wastewater 1.
Specifically, the biochemical wastewater 1 is subjected to precipitation, filtration and ultrafiltration in the pretreatment device 2 in sequence, and then is subjected to primary concentration in the first-stage reverse osmosis device 3 to obtain first-stage concentrated water; concentrating the first-stage concentrated water by a second-stage reverse osmosis device 5 to obtain second-stage concentrated water; concentrating the second-stage concentrated water by a third-stage reverse osmosis device 6 to obtain third-stage concentrated water; the three sections of concentrated water generate mother liquor 8 through an evaporation crystallization device 7, and impurity salt is separated out, and the mother liquor 8 flows back to the biochemical wastewater 1. Can effectively get rid of impurity such as COD, TDS in biochemical waste water 1, and the little mother liquor 8 that produces returns in biochemical waste water 1 again to realize the emission of zero mother liquor.
Wherein, the precipitation, filtration and ultrafiltration in the pretreatment device 2 are the prior art, and the structure thereof is not improved in the invention.
Optionally, the first reverse osmosis unit 3 is an ED membrane; a section of fresh water generated by the concentration of the ED membrane enters the HPRO membrane 4 for concentration; and the concentrated water concentrated by the HPRO membrane 4 flows back to the water inlet pipe of the biochemical wastewater 1. Wherein, the fresh water concentrated by the HPRO membrane 4 can be recycled.
Optionally, the two-stage reverse osmosis device 5 is a material membrane; and two sections of fresh water generated by the concentration of the material membrane flow back to the water inlet pipe of the biochemical wastewater 1.
Optionally, the three-stage reverse osmosis unit 6 is a UHPRO membrane. After the two-stage concentrated water is concentrated by the UHPRO membrane, the generated three-stage concentrated water is evaporated and crystallized to separate out impurity salt, and the generated three-stage fresh water can be recycled.
In conclusion, according to the method and the system for treating the zero mother liquor of the biochemical wastewater evaporative crystallization, the biochemical wastewater 1 is subjected to precipitation, filtration and ultrafiltration in sequence, and is subjected to evaporation crystallization after being concentrated for three times by the reverse osmosis membrane, so that the impurities such as COD (chemical oxygen demand), TDS (total dissolved solids) and the like in the biochemical wastewater 1 can be effectively removed, and a small amount of generated mother liquor 8 is returned to the biochemical wastewater 1, so that the zero mother liquor is discharged, and a large amount of operation cost is saved for enterprises; a section of fresh water generated by the concentration of the ED membrane enters the HPRO membrane 4 for concentration, so that the impurity removal rate can be improved.
The components selected for use in the present application (components not illustrated for specific structures) are all common standard components or components known to those skilled in the art, and the structure and principle thereof can be known to those skilled in the art through technical manuals or through routine experimentation.
In the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (8)
1. A method for treating biochemical wastewater evaporation crystallization zero mother liquor is characterized by comprising the following steps:
the biochemical wastewater is subjected to precipitation, filtration and ultrafiltration in sequence, and then is subjected to primary concentration by a section of reverse osmosis membrane to obtain a section of concentrated water;
concentrating the first-stage concentrated water by a second-stage reverse osmosis membrane to obtain second-stage concentrated water;
concentrating the second-stage concentrated water by a third-stage reverse osmosis membrane to obtain third-stage concentrated water;
evaporating and crystallizing the three sections of concentrated water to generate mother liquor and separate out miscellaneous salts;
the mother liquor flows back to the biochemical wastewater.
2. The method for treating biochemical wastewater evaporative crystallization zero mother liquor according to claim 1,
the first section of reverse osmosis membrane is an ED membrane;
concentrating a section of fresh water generated by concentrating the ED membrane through an HPRO membrane;
and the concentrated water concentrated by the HPRO membrane flows back to the biochemical wastewater.
3. The method for treating biochemical wastewater evaporative crystallization zero mother liquor according to claim 1,
the second-stage reverse osmosis membrane is a material membrane;
and two sections of fresh water generated by the concentration of the material membrane flow back to the biochemical wastewater.
4. The method for treating biochemical wastewater evaporative crystallization zero mother liquor according to claim 1,
the three sections of reverse osmosis membranes are UHPRO membranes.
5. A biochemical waste water evaporation crystallization zero mother liquor's processing system which characterized in that includes:
the device comprises a pretreatment device, a first-stage reverse osmosis device, a second-stage reverse osmosis device, a third-stage reverse osmosis device and an evaporative crystallization device;
the pretreatment device is suitable for treating biochemical wastewater, and the pretreated biochemical wastewater enters a first-stage reverse osmosis device for concentration;
the first-stage concentrated water generated by the concentration of the first-stage reverse osmosis device enters a second-stage reverse osmosis device for secondary concentration;
the second-stage concentrated water generated by the concentration of the second-stage reverse osmosis device enters a third-stage reverse osmosis device for tertiary concentration;
the evaporation crystallization device is suitable for evaporating and crystallizing three sections of concentrated water generated by concentration of the three sections of reverse osmosis devices, and mother liquor generated by the evaporation crystallization device flows back to the water inlet pipe of biochemical wastewater.
6. The system for treating biochemical wastewater evaporative crystallization zero mother liquor according to claim 5,
the first-stage reverse osmosis device is an ED membrane;
a section of fresh water generated by the concentration of the ED membrane enters an HPRO membrane for concentration;
and the concentrated water concentrated by the HPRO membrane flows back to the water inlet pipe of the biochemical wastewater.
7. The system for treating biochemical wastewater evaporative crystallization zero mother liquor according to claim 5,
the two-stage reverse osmosis device is a material film;
and two sections of fresh water generated by the concentration of the material membrane flow back to the water inlet pipe of the biochemical wastewater.
8. The system for treating biochemical wastewater evaporative crystallization zero mother liquor according to claim 5,
the three-section reverse osmosis device is a UHPRO membrane.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112340938A (en) * | 2020-10-26 | 2021-02-09 | 烟台金正环保科技有限公司 | Membrane system for realizing high-power concentration |
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| CN105776700A (en) * | 2016-03-24 | 2016-07-20 | 华东理工大学 | Waste water nitrogen and phosphorus zero emission technology |
| CN107445377A (en) * | 2017-08-09 | 2017-12-08 | 四川美富特环境治理有限责任公司 | A kind of biochemical waste water Zero-discharge treating process and processing system |
| CN210885674U (en) * | 2019-11-11 | 2020-06-30 | 苏州澄江环境科技有限公司 | Biochemical waste water evaporation crystallization zero mother liquor's processing system |
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- 2019-11-11 CN CN201911093910.8A patent/CN110697963A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105540970A (en) * | 2015-12-22 | 2016-05-04 | 南京工业大学 | Integrated treatment process for reverse osmosis concentrated water in reuse of reclaimed water through near-zero discharge membrane method |
| CN105776700A (en) * | 2016-03-24 | 2016-07-20 | 华东理工大学 | Waste water nitrogen and phosphorus zero emission technology |
| CN107445377A (en) * | 2017-08-09 | 2017-12-08 | 四川美富特环境治理有限责任公司 | A kind of biochemical waste water Zero-discharge treating process and processing system |
| CN210885674U (en) * | 2019-11-11 | 2020-06-30 | 苏州澄江环境科技有限公司 | Biochemical waste water evaporation crystallization zero mother liquor's processing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112340938A (en) * | 2020-10-26 | 2021-02-09 | 烟台金正环保科技有限公司 | Membrane system for realizing high-power concentration |
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