CN106477810A - A kind of combined modified NF membrane of MBR realizes the processing method of high salt organic waste water reuse - Google Patents
A kind of combined modified NF membrane of MBR realizes the processing method of high salt organic waste water reuse Download PDFInfo
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- CN106477810A CN106477810A CN201610934038.5A CN201610934038A CN106477810A CN 106477810 A CN106477810 A CN 106477810A CN 201610934038 A CN201610934038 A CN 201610934038A CN 106477810 A CN106477810 A CN 106477810A
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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
- C02F1/44—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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1268—Membrane bioreactor systems
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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 discloses a kind of combined modified NF membrane of MBR realizes the processing method of high salt organic waste water reuse, the method includes：High salt organic waste water initially enters MBR pond, MBR is entered through MBR film separation system after MBR pond enhanced biological is processed and produce pond, produce waste water in pond to process through modified nanofiltration membrane system again, is produced from pond eventually through end and recycle-water is discharged, the concentrated water that modified nanofiltration membrane system is produced is reflowable to be reprocessed to leading portion biochemistry pool.The processing method is stable, produces water continuously, builds and operating cost is low.
Description
Technical field
The invention belongs to Industrial Wastewater Treatment reuse field, and in particular to a kind of combined modified NF membrane of MBR realizes high salt
The processing method of organic wastewater reuse.
Background technology
The many activities of the mankind all be unable to do without water, and industrial processes are more based on water.Water meeting through industrial utilization
It is heavily polluted, makes water lose original function and value.In recent years, although water pollution problems has obtained enough attention, and
And pollution level has controlled, but still very lack water quality resource.Currently, industrial enterprise, particularly dyeing, pharmacy
Industry etc. discharges substantial amounts of waste water, and most of enterprise requires carries out effective reuse to the waste water that these discharge.Undoubtedly, industry
Waste water recycling is to improve water utilization rate, protects one of most effective measure of water quality resource.
Reverse osmosis membrane technology is at home and abroad quickly grown, extensively in recent years as efficient, the easy-operating technology of one kind
Be applied to the multiple fields such as electric power, metallurgy, chemical industry, pharmacy, food, be especially applicable to desalinization, the circulation of waste water profit
With and recovery to utility etc..The reuse for waste water being realized using reverse osmosis membrane technology is current common practice, but instead
Infiltration membranous system input is huge, and is very easy to cause dirt stifled, and the life-span for using is very limited.Meanwhile, reverse osmosis membrane is discharged
The difficult problem that always processes of concentrated water, due to the waste water while containing high organic concentration and high salinity, adopting for this effluent part
Also effectively removal is difficult to conventional dirty water living creature processing technique.This is because, biological treatment is depended on through domestication in system
Microorganism metabolic pathway to remove pollutant, and these microorganisms have certain requirement, such as temperature to the water quality of waste water,
Salinity, pH etc..Wherein too high in waste water salinity, it will the exception of impact microbial cell osmolality, causes intracellular de-
Water, and then the eubolism of microorganism is affected, finally the pollutant in waste water effectively cannot be removed.Thus, in waste water
Before entering biosystem, in addition it is also necessary to carry out necessary regulation and control to salinity in waste water, in order to avoid microflora is caused damage.
As described above, inevitably facing the problem of fouling membrane in reverse osmosis membrane system running, although by one
Fixed mode can mitigate the degree of fouling membrane, extend the time limit that film is used.But, contaminated reverse-osmosis membrane element is impossible
Thoroughly cleaned, the service life of general membrane component only 3 years.From reverse osmosis membrane using quantity from the point of view of, have every year
Large batch of reverse osmosis membrane goes out of use.Therefore, stably reclaim reverse osmosis membrane to be not difficult, if being used then advantageously.
For part industrial enterprise, reuse water quality need not reach the requirement of reverse osmosis membrane water outlet, such as content of organics be had
Higher requirement, but not high to salinity requirements.Too big using reverse osmosis membrane cost under the conditions of this, and do not have completely must
Will.
Content of the invention
It is an object of the invention to provide a kind of combined modified NF membrane of MBR realizes the process side of high salt organic waste water reuse
On the one hand method, the method can be effectively treated to high salt organic waste water, realize the reuse of waste water, another aspect the method energy
Discarded reverse osmosis membrane assembly is enough made full use of, realizes utilization of waste as resource.
For reaching above-mentioned purpose, the present invention adopts following technical proposals：
A kind of combined modified NF membrane of MBR realizes the processing method of high salt organic waste water reuse, and high salt organic waste water is first
MBR pond is entered, and muddy water is realized through MBR film separation system after MBR pond enhanced biological processes the organic matter removed in waste water and is divided
From the water after separating enters MBR and produces pond, and MBR produces waste water in pond and contained after the process of modified nanofiltration membrane system again
The concentrated water of organic matter and the water containing inorganic ion, the concentrate recirculation containing organic matter are reprocessed to biochemistry pool,
The water containing inorganic ion produces pond by modified nanofiltration membrane system and discharges recycle-water.
As preferred technical scheme：
Processing method of the present invention, the high salt organic waste water, its TDS ＜ 10000mg/L, COD ＜ 1000mg/L,
PH is 6-9.
Processing method of the present invention, in the MBR pond, sludge concentration is 8000-12000mg/L.
Processing method of the present invention, the modification NF membrane is by discarding reverse osmosis membrane oxidation modification；Described
Modified nanofiltration membrane system is mainly made up of some modification nanofiltration membrane components, including rolling, hollow fiber form, plate and frame or tubular type；
Part mainly includes each modified nanofiltration membrane component from inside to outside：Permeate stem stem, barrier film net, film, screen cloth and shell.
Processing method of the present invention, the discarded reverse osmosis membrane oxidation modification key step include：1) conventional soda acid
Cleaning reverse osmosis membrane；2) immersion treatment is carried out to reverse osmosis membrane using oxidant.
Processing method of the present invention, the oxidant are 15-20% aqueous sodium hypochlorite solution, and soak time is 60-
180min.
Processing method of the present invention, recycle-water COD ＜ 30mg/L, the TDS ＜ 500mg/L.
Processing method of the present invention, the biochemistry pool are activated sludge or biological film sewage treatment system.
Compared with prior art, its advantage is mainly reflected in the following aspects to the present invention：
1st, treatment effect is stable, produces water continuous.
2nd, discarded reverse osmosis membrane is taken full advantage of, substantially reduces investment and operating cost.
Description of the drawings
Fig. 1 is the process route view of the present invention.
In figure：1 MBR pond；2 MBR produce pond；3 modified nanofiltration membrane system；4 modified nanofiltration membrane system produce pond.
Specific embodiment
The present invention is further described with reference to the accompanying drawings and examples.
As shown in figure 1, a kind of combined modified NF membrane of MBR of the present invention realizes the process side of high salt organic waste water reuse
Method, high salt organic waste water initially enter MBR pond 1, through MBR after the organic matter processed in removal waste water by 1 enhanced biological of MBR pond
Film separation system realizes mud-water separation, and the water after separating enters waste water in 2, the MBR product pond 2 of MBR product pond and receives through modification again
Filter membrane system 3 obtains the concentrated water containing organic matter and the water containing inorganic ion, the concentrate recirculation containing organic matter after processing
Reprocessed to biochemistry pool, the water containing inorganic ion produces pond 4 by modified nanofiltration membrane system and discharges recycle-water, modified
It is simple pool construction that nanofiltration membrane system produces pond 4.3 water outlet of modified nanofiltration membrane system enters modified nanofiltration by pipe-line system
Membranous system produces pond 4, and the water that modified nanofiltration membrane system is produced in pond 4 is discharged or reuse by pump lifting.
Wherein, high salt organic waste water, its TDS ＜ 10000mg/L, COD ＜ 1000mg/L, pH are 6-9；Sludge in MBR pond
Concentration is 8000-12000mg/L；Modified NF membrane by discard reverse osmosis membrane oxidation modification, reverse osmosis membrane oxidized it
Afterwards, membrane aperture changes, and molecular weight cut off becomes big, can be used for nanofiltration system, and modified nanofiltration membrane system is mainly by some modifications
Nanofiltration membrane component constitutes, including rolling, hollow fiber form, plate and frame or tubular type；Each modified nanofiltration membrane component group from inside to outside
Part is become mainly to include：Permeate stem stem, barrier film net, film, screen cloth and shell
Wherein, discarding reverse osmosis membrane oxidation modification key step includes：1) conventional soda acid cleaning reverse osmosis membrane；2) oxygen is adopted
Agent carries out immersion treatment to reverse osmosis membrane, and oxidant is 15-20% aqueous sodium hypochlorite solution, and soak time is 60-180min.
Wherein, recycle-water COD ＜ 30mg/L, TDS ＜ 500mg/L.
Wherein, biochemistry pool is any type of activated sludge or biological film sewage treatment system.
Embodiment one：
Shaoxing printing and dyeing mill Treated sewage reusing engineering, inflow 2000t/d, before entering MBR system, waste water COD is 400-
It is 80-100mg/L for 6.5-8.5, SS that 500mg/L, TDS are 6000-9000mg/L, pH, and colourity is 15-40 (extension rate).
MBR diaphragm selects universal SMM-1525 (T), and design flux is 15L/ (m2H), arranging membrane component quantity is
560, membrane module quantity 4.Modified nanofiltration membrane system, using two sections of arrangement mode of one-level, design flux is 16.71L/
(m2H), membrane component quantity is 90.
MBR produces water efficiency 100%, RO and produces water efficiency 60% after treatment, that is, produce Water circulation water 1200t/d, COD and be less than
30mg/L, TDS are that 6.5-8.5, SS are less than 1mg/L less than 500mg/L, pH, and colourity is less than 5 (extension rates).Modified NF membrane
The concentrated water of generation is directly entered leading portion biochemistry pool.
Embodiment two：
Shaoxing printing and dyeing mill Treated sewage reusing engineering, inflow 2000t/d, before entering MBR system, waste water COD is 350-
It is 60-80mg/L for 6.5-8.5, SS that 400mg/L, TDS are 4000-7000mg/L, pH, and colourity is 15-35 (extension rate).
MBR diaphragm selects universal SMM-1525 (T), and design flux is 15L/ (m2H), arranging membrane component quantity is
560, membrane module quantity 4.Modified nanofiltration membrane system, using two sections of arrangement mode of one-level, design flux is 16.71L/
(m2H), membrane component quantity is 90.
MBR produces water efficiency 100%, RO and produces water efficiency 60% after treatment, that is, produce Water circulation water 1200t/d, COD and be less than
20mg/L, TDS are that 6.5-8.5, SS are less than 1mg/L less than 300mg/L, pH, and colourity is less than 5 (extension rates).Modified NF membrane
The concentrated water of generation is directly entered front end biochemistry pool.
Embodiment three：
Jiaxing bleaching and dyeing house Treated sewage reusing engineering, inflow 12000t/d, before entering MBR system, waste water COD is 150-
It is 80-100mg/L for 6-9, SS that 200mg/L, TDS are 9000-10000mg/L, pH, and colourity is 15-50 (extension rate).
MBR diaphragm selects CMBR20, and design flux is 15L/ (m2H), membrane component amount total 1950, membrane module number
52 sets of amount.Modified nanofiltration membrane system, using two sections of arrangement mode of one-level, design flux is 14.9L/ (m2H), membrane element number of packages
Measure as 624,4 sets.
MBR produces water efficiency 100%, RO and produces water efficiency 66% after treatment, that is, produce Water circulation water 8000t/d, COD and be less than
30mg/L, TDS are that colourity is less than 5 (extension rates) less than 10mg/L less than 500mg/L, pH for 6.5-8.5, SS.Produced returns
Meet dyeing water requirement with water, be used directly for the dyeing water of the factory.
Claims (8)
1. a kind of combined modified NF membrane of MBR realizes the processing method of high salt organic waste water reuse, it is characterised in that：High salt is organic
Waste water initially enters MBR pond, through MBR film separation system reality after the organic matter processed in removal waste water by MBR pond enhanced biological
Existing mud-water separation, the water after separating enter MBR and produce pond, and in MBR product pond, waste water is again after the process of modified nanofiltration membrane system
The concentrated water containing organic matter and the water containing inorganic ion is obtained, the concentrate recirculation containing organic matter is carried out to biochemistry pool
Reprocessing, the water containing inorganic ion are produced pond by modified nanofiltration membrane system and discharge recycle-water.
2. processing method according to claim 1, it is characterised in that the high salt organic waste water, its TDS ＜ 10000mg/
L, COD ＜ 1000mg/L, pH are 6-9.
3. processing method according to claim 1, it is characterised in that sludge concentration is 8000- in the MBR pond
12000mg/L.
4. processing method according to claim 1, it is characterised in that the modification NF membrane is by discarding reverse osmosis membrane oxygen
Change modified；The modification nanofiltration membrane system is mainly made up of some modification nanofiltration membrane components, including rolling, doughnut
Formula, plate and frame or tubular type；Part mainly includes each modified nanofiltration membrane component from inside to outside：Permeate stem stem, barrier film net,
Film, screen cloth and shell.
5. processing method according to claim 4, it is characterised in that the discarded reverse osmosis membrane oxidation modification key step
Including：1) conventional soda acid cleaning reverse osmosis membrane；2) immersion treatment is carried out to reverse osmosis membrane using oxidant.
6. processing method according to claim 5, it is characterised in that the oxidant is that 15-20% sodium hypochlorite is water-soluble
Liquid, soak time are 60-180min.
7. processing method according to claim 1, it is characterised in that recycle-water COD ＜ 30mg/L, the TDS ＜
500mg/L.
8. processing method according to claim 1, it is characterised in that the biochemistry pool is activated sludge or biomembrane sewage
Processing system.
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| CN201610934038.5A CN106477810A (en) | 2016-10-31 | 2016-10-31 | A kind of combined modified NF membrane of MBR realizes the processing method of high salt organic waste water reuse |
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| CN201610934038.5A CN106477810A (en) | 2016-10-31 | 2016-10-31 | A kind of combined modified NF membrane of MBR realizes the processing method of high salt organic waste water reuse |
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Citations (5)
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|---|---|---|---|---|
| CN102059056A (en) * | 2010-12-01 | 2011-05-18 | 浙江理工大学 | Nanofiltration reproduction method of waste reverse osmosis membrane element |
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| CN105461157A (en) * | 2014-09-09 | 2016-04-06 | 中国石油化工股份有限公司 | High-salinity high-organic-matter contentwastewater zero discharge method |
| CN105540980A (en) * | 2016-01-30 | 2016-05-04 | 内蒙古久科康瑞环保科技有限公司 | Advanced oxidation-separate salt crystallization combination system of high-salt-salt industrial wastewater |
-
2016
- 2016-10-31 CN CN201610934038.5A patent/CN106477810A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011079413A1 (en) * | 2009-12-30 | 2011-07-07 | General Electric Company | Non-woven membrane bioreactor and its fouling control method |
| CN102059056A (en) * | 2010-12-01 | 2011-05-18 | 浙江理工大学 | Nanofiltration reproduction method of waste reverse osmosis membrane element |
| CN103359873A (en) * | 2012-03-27 | 2013-10-23 | 中国科学院生态环境研究中心 | Method for processing and recycling MBR-NF (membrane bioreactor-nanofiltration) antibiotic wastewater based on thick water backflow |
| CN105461157A (en) * | 2014-09-09 | 2016-04-06 | 中国石油化工股份有限公司 | High-salinity high-organic-matter contentwastewater zero discharge method |
| CN105540980A (en) * | 2016-01-30 | 2016-05-04 | 内蒙古久科康瑞环保科技有限公司 | Advanced oxidation-separate salt crystallization combination system of high-salt-salt industrial wastewater |
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Application publication date: 20170308 |