CN106396173A - Reverse osmosis concentrated water treatment method and reverse osmosis concentrated water treatment system - Google Patents
Reverse osmosis concentrated water treatment method and reverse osmosis concentrated water treatment system Download PDFInfo
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- CN106396173A CN106396173A CN201610922194.XA CN201610922194A CN106396173A CN 106396173 A CN106396173 A CN 106396173A CN 201610922194 A CN201610922194 A CN 201610922194A CN 106396173 A CN106396173 A CN 106396173A
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- water
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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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
Abstract
The invention provides a reverse osmosis concentrated water treatment method. The method includes steps: adopting a nanofiltration membrane for concentration and separation of reverse osmosis concentrated water treated by cartridge filter; subjecting the concentrated and separated reverse osmosis concentrated water to ozone oxidation treatment to guarantee that effluent COD (chemical oxygen demand) is 120-230mg/L; mixing with nanofiltration produced water being smaller than or equal to 30mg/L in COD and produced by the nanofiltration membrane to guarantee that water COD is smaller than 60mg/L. Organic matters are enriched in nanofiltration concentrated water, and accordingly water treatment quantity in an ozone oxidation process is decreased, and more organic matters can be oxidized under the condition of a same removal rate. Further, most of chlorine ions enter a water production side in a nanofiltration and concentration process without gathering on a concentrated water side, so that disturbances on the ozone oxidation process are reduced, and the ozone utilization rate is increased. In addition, effluent obtained by ozone oxidation treatment of the nanofiltration concentrated water is blended with the nanofiltration produced water according to a certain proportion, and consequently standard emission of final treated effluent can be realized.
Description
Technical field
The present invention relates to water-treatment technology field, especially relate to a kind of reverse osmosis thick water treatment method and system.
Background technology
The waste water producing in the industrial processes such as electric power, metallurgy, chemical industry, desalinization, printing and dyeing, papermaking usually contains relatively
High hardness and higher salinity, higher hardness be primarily referred to as calcium in sewage, magnesium ion total concentration high, such waste water
If unprocessed direct discharge, the salinization of soil of water body and soil, present environmental risks can be caused.
Reverse osmosis process, as the advanced and effective desalting technology of one kind, is widely used in the advanced treating of above-mentioned waste water
During.But reverse-osmosis treated process produce concentrated water be reverse osmosis concentrated water comprise dissolve inorganic salts and hardly degraded organic substance, no
Can directly discharge, the sewage disposal system returning directly to front end can have adverse effect on to biochemical system etc., therefore instead again
Infiltration concentrated water need to be processed further to meet the requirement of qualified discharge or reuse.
In prior art, treatment technology mainly active carbon adsorption, advanced oxidation processes etc. of reverse osmosis concentrated water.
Wherein, active carbon adsorption can be removed to organic matter well, but needs after charcoal absorption saturation again
Can be continuing with after life, operationally cumbersome.
In addition, advanced oxidation processes are by oxidation process, the organic matter in reverse osmosis concentrated water to be carried out with degraded to remove,
But investment operating cost is higher when this technology is used alone.
Content of the invention
It is an object of the invention to provide a kind of reverse osmosis thick water treatment method and system, to solve to exist in prior art
Reverse osmosis concentrated water process problem, to meet the requirement of qualified discharge or reuse.
A kind of reverse osmosis thick water treatment method that the present invention provides, comprises the steps：
Concentrating and separating is carried out to the reverse osmosis concentrated water after cartridge filter is processed by NF membrane；
Ozone Oxidation Treatment is carried out to the reverse osmosis concentrated water after concentrating and separating it is ensured that its water outlet COD 120～
Between 230mg/L；
Finally it is produced water with the nanofiltration of the COD≤30mg/L of described NF membrane output to mix it is ensured that producing water COD ＜
60mg/L.
Further, in an embodiment of the present invention, by NF membrane to the reverse osmosis after cartridge filter is processed
After concentrated water carries out concentrating and separating thoroughly, carry out described ozone Oxidation Treatment；
Wherein, the reverse osmosis concentrated water part after described concentrating and separating carries out described ozone Oxidation Treatment, another part
It is back in described first water tank；
The reverse osmosis concentrated water being back in described first water tank with carry out described ozone after described NF membrane concentrating and separating
The ratio of the reverse osmosis concentrated water of oxidation processes is 8～20:Between 1.
Further, in an embodiment of the present invention, the reverse osmosis concentrated water being back in described first water tank continues through
NF membrane carries out concentrating and separating；
Be concentrated into through described NF membrane when water outlet conductivity >=50000 μ S/cm when carry out ozone Oxidation Treatment it is ensured that it goes out
Water COD is between 120～230mg/L.
Further, in an embodiment of the present invention, during described ozone Oxidation Treatment,
When processing the concentrated water of the real-time output of NF membrane, ozone concentration is 200～400mg/L, and the reaction time is 1～3h；
Or,
During described ozone Oxidation Treatment, when processing the second water tank 5 water outlet, ozone concentration is 300～400mg/
L, the reaction time is 2～3h.
Further, in an embodiment of the present invention, by NF membrane to the reverse osmosis after cartridge filter is processed
During concentrated water carries out concentrating and separating thoroughly, the NF membrane rate of recovery is controlled between 60%～95%.
Further, in an embodiment of the present invention, described nanofiltration produce water with reverse osmosis concentrated after ozone Oxidation Treatment
Volume ratio >=3 of water yield during water mixing:1.
A kind of reverse osmosis thick water treatment system, including cartridge filter, NF membrane and ozone-oxidizing device；Described ensured public security
Filter, NF membrane and ozone-oxidizing device are sequentially connected；
Described NF membrane, for carrying out concentrating and separating to the reverse osmosis concentrated water after described cartridge filter is processed；
Described ozone-oxidizing device, for carrying out ozone Oxidation Treatment to the reverse osmosis concentrated water after concentrating and separating.
Further, in an embodiment of the present invention, it is provided with first between described cartridge filter and described NF membrane
Water tank, is provided with the second water tank, the outlet of described ozone-oxidizing device between described first water tank and described ozone-oxidizing device
It is provided with three-tank, described three-tank is connected with discharge pond.
Further, in an embodiment of the present invention, described ozone-oxidizing device includes ozone generator, ozone oxidation
Tower, ozone tail gas processor and ozone oxidation catalyst.
Further, in an embodiment of the present invention, described NF membrane includes salt tolerant and resistance to organic matter film.
In technique scheme, organic matter is enriched with nanofiltration concentrated water, thus reducing ozone oxidation process
Process the water yield, the more organic matters of oxidable removal in the case of identical clearance；Meanwhile, nanofiltration concentration process major part chlorine
Ion enters and produces water side, will not reduce the interference to ozone oxidation process, improve the utilization of ozone in concentrated water lateral enrichment
Rate.
Nanofiltration concentrated water is produced through ozone Oxidation Treatment water outlet and nanofiltration and be can achieve that final process goes out after water is blent by a certain percentage
The qualified discharge of water.
Brief description
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
In embodiment or description of the prior art the accompanying drawing of required use be briefly described it should be apparent that, below describe in
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not paying creative work
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 is the flow chart of reverse osmosis thick water treatment method provided in an embodiment of the present invention；
Fig. 2 is the structural representation of reverse osmosis thick water treatment system provided in an embodiment of the present invention.Reference：
1- cartridge filter；2- NF membrane；3- ozone-oxidizing device；
4- first water tank；5- second water tank；6- three-tank；
7- discharges pond.
Specific embodiment
Below in conjunction with accompanying drawing, technical scheme is clearly and completely described with the enforcement it is clear that described
Example is a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of not making creative work, broadly falls into the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation of instruction such as " level ", " interior ", " outward " or position relationship are based on orientation shown in the drawings or position relationship, merely to
Be easy to describe the present invention and simplify description, rather than instruction or the hint device of indication or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or hint relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected, or is integrally connected；Can
To be to be mechanically connected or electrical connection；Can be to be joined directly together it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Fig. 1 is the flow chart of reverse osmosis thick water treatment method provided in an embodiment of the present invention；
First, as shown in figure 1, a kind of reverse osmosis thick water treatment method of the present embodiment offer, comprise the steps：
Concentrating and separating is carried out to the reverse osmosis concentrated water after cartridge filter 1 is processed by NF membrane 2；
Ozone Oxidation Treatment is carried out to the reverse osmosis concentrated water after concentrating and separating it is ensured that its water outlet COD 120～
Between 230mg/L；
Finally it is produced water with the nanofiltration of the COD≤30mg/L of described NF membrane 2 output to mix it is ensured that producing water COD ＜
60mg/L.
In above-mentioned steps, described cartridge filter belongs to accurate filter, when its operation principle is using 5 μm of PP filter core
Hole carry out mechanical filter, so that the trace suspension particle of remaining, colloid, microorganism etc. is trapped or adsorb
In cartridge surface and hole.
The filter core accuracy class of its internal dress can be divided into 0.5 μ s, 1 μ s, 5 μ s, 10 μ s etc., according to different use fields
Close from different filtering accuracies, with water outlet precision after ensureing and the safety ensureing rear class membrane component.PP cotton, Buddhist nun typically can be adopted
The unlike material such as imperial, melt-blown makees filter core, goes the small suspension in eliminating water, bacterium and other impurity etc., so that raw water quality is reached
The inflow requirement of reverse osmosis membrane.
With the growth of water time processed, because of the pollution of trapped substance, its running resistance is gradually increasing filter core, extremely passes in and out when running
When saliva pressure reduction reaches 0.1MPa, filter core can be changed according to actual conditions, the major advantage of cartridge filter 1 is efficiency high, resistance
Power is little, be conveniently replaceable.
After reverse osmosis concentrated water being processed by cartridge filter 1, then by described NF membrane 2, it is concentrated
Separate, then more described ozone Oxidation Treatment is carried out to it, further reverse osmosis concentrated water is processed, work as ozone Oxidation Treatment
Degree ensure that its water outlet COD between 120～230mg/L.
Wherein, pending reverse osmosis concentrated water can also be first passed around after pretreatment, then pass through described cartridge filter 1
Processed.
In the particular embodiment, by NF membrane 2, the reverse osmosis concentrated water after cartridge filter 1 is processed is being carried out
After concentrating and separating, after default first water tank 4, carry out described ozone Oxidation Treatment；
Wherein, the reverse osmosis concentrated water part after described concentrating and separating carries out described ozone Oxidation Treatment, another part
It is back in described first water tank 4；
The reverse osmosis concentrated water being back in described first water tank 4 with carry out ozone oxidation after described NF membrane concentrating and separating
The ratio of the reverse osmosis concentrated water processing is 8～20:Between 1.
Wherein, the reverse osmosis concentrated water being back in described first water tank 4 continues through NF membrane 2 and carries out concentrating and separating；
Be concentrated into through described NF membrane when water outlet conductivity >=50000 μ S/cm when carry out ozone Oxidation Treatment it is ensured that it goes out
Water COD is between 120～230mg/L.
Further, during described ozone Oxidation Treatment,
When processing the concentrated water of the real-time output of NF membrane, ozone concentration is 200～400mg/L, and the reaction time is 1～3h；
Or,
During described ozone Oxidation Treatment, when processing the second water tank 5 water outlet, ozone concentration is 300～400mg/
L, the reaction time is 2～3h.
In the particular embodiment, by NF membrane 2, the reverse osmosis concentrated water after cartridge filter 1 is processed is being entered
During row concentrating and separating, NF membrane 2 rate of recovery is controlled between 60%～95%.
In the particular embodiment, water yield when water is mixed is produced in described nanofiltration with the meal infiltration concentrated water after ozone Oxidation Treatment
Volume ratio >=3:1.
Fig. 2 is the structural representation of reverse osmosis thick water treatment system provided in an embodiment of the present invention；As shown in Fig. 2 another
In one embodiment, additionally provide a kind of reverse osmosis thick water treatment system, including cartridge filter 1, NF membrane 2 and ozone oxidation
Device 3；Described cartridge filter 1, NF membrane 2 and ozone-oxidizing device 3 are sequentially connected；
Described NF membrane 2, for carrying out concentrating and separating to the reverse osmosis concentrated water after described cartridge filter 1 is processed；
Described ozone-oxidizing device 3, for carrying out ozone Oxidation Treatment to the reverse osmosis concentrated water after concentrating and separating.
By described reverse osmosis thick water treatment system, above-mentioned reverse osmosis thick water treatment method is implemented, in work
When, first reverse osmosis concentrated water is processed by described cartridge filter 1, described cartridge filter belongs to accurate filter,
When its operation principle is to carry out mechanical filter using the hole of 5 μm of PP filter core, make the trace suspension of remaining in reverse osmosis concentrated water
Grain, colloid, microorganism etc. are trapped or adsorb in cartridge surface and hole.
The filter core accuracy class of its internal dress can be divided into 0.5 μ s, 1 μ s, 5 μ s, 10 μ s etc., according to different use fields
Close from different filtering accuracies, with water outlet precision after ensureing and the safety ensureing rear class membrane component.PP cotton, Buddhist nun typically can be adopted
The unlike material such as imperial, melt-blown makees filter core, goes the small suspension in eliminating water, bacterium and other impurity etc., so that raw water quality is reached
The inflow requirement of reverse osmosis membrane.
With the growth of water time processed, because of the pollution of trapped substance, its running resistance is gradually increasing filter core, extremely passes in and out when running
When saliva pressure reduction reaches 0.1MPa, filter core can be changed according to actual conditions, the major advantage of cartridge filter 1 is efficiency high, resistance
Power is little, be conveniently replaceable.
After reverse osmosis concentrated water being processed by cartridge filter 1, then by described NF membrane 2, it is carried out dense
Division is from the particular embodiment, the nanofiltration concentrated water part producing in real time after described concentrating and separating is processed is back to
First water tank 4 continues cycling through concentrating and separating, and a part carries out ozone Oxidation Treatment it is ensured that it goes out through described ozone-oxidizing device 3
Water COD is temporary in 120～230mg/L heel row to three-tank 6；Continue cycling through in first water tank 4 after concentrating and separating through nanofiltration
Film circulation concentrating and separating to a certain extent heel row be collected to the second water tank 5, after carry out through described ozone-oxidizing device 3 smelly
Oxygen oxidation processes are it is ensured that its water outlet COD120～150mg/L heel row is temporary to described three-tank 6；Three-tank 6 water outlet with
The nanofiltration of the COD≤30mg/L of NF membrane 2 output is produced water and is mixed in described discharge pond 7 by a certain percentage it is ensured that producing water COD
Qualified discharge after ＜ 60mg/L, at this moment, discharge just can meet requirement.
Wherein, pending reverse osmosis concentrated water can also be first passed around after pretreatment, then pass through described cartridge filter 1
Processed.
Wherein, it is back to the reverse osmosis concentrated water in described first water tank 4 and the reverse osmosis after described NF membrane concentrating and separating
Thoroughly the ratio of concentrated water is 8～20:Between 1.
Wherein, the reverse osmosis concentrated water being back in described first water tank 4 continues through NF membrane 2 when carrying out concentrating and separating,
Described to a certain degree represent：Be concentrated into through described NF membrane when water outlet conductivity >=50000 μ S/cm when carry out at ozone oxidation
Reason is it is ensured that its water outlet COD is between 120～230mg/L.
Further, during described ozone Oxidation Treatment,
When processing the concentrated water of the real-time output of NF membrane, ozone concentration is 200～400mg/L, and the reaction time is 1～3h；
Or,
During described ozone Oxidation Treatment, when processing the second water tank 5 water outlet, ozone concentration is 300～400mg/
L, the reaction time is 2～3h.
In the particular embodiment, by NF membrane 2, the reverse osmosis concentrated water after cartridge filter 1 is processed is being entered
During row concentrating and separating, NF membrane 2 rate of recovery is controlled between 60%～95%.
In the particular embodiment, water yield when water is mixed is produced in described nanofiltration with the reverse osmosis concentrated water after ozone Oxidation Treatment
Volume ratio >=3:1.
In the particular embodiment, it is provided with the first water tank 4 between described cartridge filter 1 and described NF membrane 2, described
It is provided with the second water tank 5, the outlet of described ozone-oxidizing device 3 is provided between first water tank 4 and described ozone-oxidizing device 3
Three-tank 6, described three-tank 6 is connected with discharge pond 7.
Further, described ozone-oxidizing device 3 include ozone generator, ozone oxidation tower, ozone tail gas processor and
Ozone oxidation catalyst.
Further, described NF membrane 2 includes salt tolerant and resistance to organic matter film.
Embodiment one
The water yield is the reverse osmosis concentrated water of 2m3/h, and COD 200mg/L enters nanofiltration system after cartridge filter 1 and processes, receives
The filter system rate of recovery is 75%, and the real-time aquifer yield of nanofiltration is 1.5m3/h, produces water COD in 20-25mg/L, nanofiltration real-time concentrated water amount
For 0.5m3/h, nanofiltration runs for a period of time, after the first water tank 4 water outlet conductivity reaches more than 50000 μ S/cm, is emitted into second
Water tank 5, now in the second water tank 5, waste water COD has reached 440-450mg/L.
During the 1-8h that in real time the nanofiltration concentrated water of output is run at it, COD content is stepped up, and scope control is in 240-
Between 470mg/L, the time of ozone Oxidation Treatment is 1-2.5h, and in waste water, ozone content is 210-330mg/L, reacts water outlet
COD, in 130-140mg/L, is emitted into three-tank 6 and keeps in.
The waste water 2.5h being 440-450mg/L with COD in ozone Oxidation Treatment the second water tank 5, ozone content dimension in waste water
Hold in 320-330mg/L, water outlet COD is in 130-140mg/L for reaction, be emitted into three-tank 6 and keep in.
In nanofiltration product water and three-tank 6, waste water is according to volume ratio 3:1 mixes in discharge pond 7, waste water COD after mixing
In 50-55mg/L, qualified discharge.
Embodiment two
The water yield is the reverse osmosis concentrated water of 20m3/h, and COD 400mg/L enters nanofiltration system after cartridge filter 1 and processes,
The nanofiltration system rate of recovery is 90%, and the real-time aquifer yield of nanofiltration is 18m3/h, produces water COD in 20-25mg/L, nanofiltration real-time concentrated water amount
For 2m3/h, nanofiltration runs for a period of time, after the first water tank 4 water outlet conductivity reaches more than 50000 μ S/cm, is emitted into the second water
Case 5, now in the second water tank 5, waste water COD has reached 850-900mg/L.
In real time the nanofiltration concentrated water of output is stepped up in its run duration COD content, scope control 450-900mg/L it
Between, the time of ozone Oxidation Treatment is 2.5-3h, and in waste water, ozone content is 240-360mg/L, and water outlet COD is in 160- for reaction
190mg/L, is emitted into three-tank 6 and keeps in.
The waste water 2.5-3h being 850-900mg/L with COD in ozone Oxidation Treatment the second water tank 5, ozone content in waste water
Maintain 340-360mg/L, water outlet COD is in 160-190mg/L for reaction, be emitted into three-tank 6 and keep in.
In nanofiltration product water and three-tank 6, waste water is according to volume ratio >=6:1 mixes in discharge pond 7, waste water after mixing
COD is in below 55mg/L, qualified discharge.
Finally it should be noted that：Various embodiments above only in order to technical scheme to be described, is not intended to limit；To the greatest extent
Pipe has been described in detail to the present invention with reference to foregoing embodiments, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, or wherein some or all of technical characteristic is entered
Row equivalent；And these modifications or replacement, do not make the essence of appropriate technical solution depart from various embodiments of the present invention technology
The scope of scheme.
Claims (10)
1. a kind of reverse osmosis thick water treatment method is it is characterised in that comprise the steps：
Concentrating and separating is carried out to the reverse osmosis concentrated water after cartridge filter (1) is processed by NF membrane (2)；
Ozone Oxidation Treatment is carried out to the reverse osmosis concentrated water after concentrating and separating it is ensured that its water outlet COD is in 120～230mg/L
Between；
Finally it is produced water with the nanofiltration of the COD≤30mg/L of described NF membrane output to mix it is ensured that producing water COD ＜ 60mg/L.
2. reverse osmosis thick water treatment method according to claim 1 it is characterised in that by NF membrane (2) to process
After reverse osmosis concentrated water after cartridge filter (1) process carries out concentrating and separating, carry out described ozone Oxidation Treatment；
Wherein, the reverse osmosis concentrated water part after described concentrating and separating carries out described ozone Oxidation Treatment, and another part flows back
To described first water tank (4)；
The reverse osmosis concentrated water being back in described first water tank (4) with carry out described ozone oxygen after described NF membrane concentrating and separating
The ratio changing the reverse osmosis concentrated water processing is 8～20:Between 1.
3. reverse osmosis thick water treatment method according to claim 2 is it is characterised in that be back to described first water tank (4)
In reverse osmosis concentrated water continue through NF membrane (2) and carry out concentrating and separating；
Be concentrated into through described NF membrane when water outlet conductivity >=50000 μ S/cm when carry out ozone Oxidation Treatment it is ensured that its water outlet
COD is between 120～230mg/L.
4. reverse osmosis thick water treatment method according to claim 3 is it is characterised in that in described ozone Oxidation Treatment process
In,
When processing the concentrated water of the real-time output of NF membrane, ozone concentration is 200～400mg/L, and the reaction time is 1～3h；
Or,
During described ozone Oxidation Treatment, when processing the second water tank 5 water outlet, ozone concentration is 300～400mg/L, instead
It is 2～3h between seasonable.
5. reverse osmosis thick water treatment method according to claim 4 it is characterised in that by NF membrane (2) to process
During reverse osmosis concentrated water after cartridge filter (1) process carries out concentrating and separating, NF membrane (2) rate of recovery is controlled
Between 60%～95%.
6. reverse osmosis thick water treatment method according to claim 5 is it is characterised in that described nanofiltration produces water and through ozone oxygen
Volume ratio >=3 of water yield when reverse osmosis concentrated water after change process mixes:1.
7. a kind of reverse osmosis thick water treatment system is it is characterised in that include cartridge filter (1), NF membrane (2) and ozone oxidation
Device (3)；Described cartridge filter (1), NF membrane (2) and ozone-oxidizing device (3) are sequentially connected；
Described NF membrane (2), for carrying out concentrating and separating to the reverse osmosis concentrated water after described cartridge filter (1) is processed；
Described ozone-oxidizing device (3), for carrying out ozone Oxidation Treatment to the reverse osmosis concentrated water after concentrating and separating.
8. reverse osmosis thick water treatment system according to claim 7 is it is characterised in that described cartridge filter (1) and institute
State and between NF membrane (2), be provided with the first water tank (4), arrange between described first water tank (4) and described ozone-oxidizing device (3)
There is the second water tank (5), the outlet of described ozone-oxidizing device (3) is provided with three-tank (6), and described three-tank (6) connects
There is discharge pond (7).
9. reverse osmosis thick water treatment system according to claim 8 is it is characterised in that described ozone-oxidizing device (3) wraps
Include ozone generator, ozone oxidation tower, ozone tail gas processor and ozone oxidation catalyst.
10. reverse osmosis thick water treatment system according to claim 9 is it is characterised in that described NF membrane (2) includes salt tolerant
With resistance to organic matter film.
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| CN103193351A (en) * | 2013-03-28 | 2013-07-10 | 北京格兰特膜分离设备有限公司 | Sewage regeneration and zero discharge method |
| CN104118973A (en) * | 2014-08-20 | 2014-10-29 | 威海百克环保工程有限公司 | Technique for processing reverse osmosis concentrated water |
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