CN106477795A - A kind of vitamin B2 waste water reclaiming integrated conduct method and device - Google Patents
A kind of vitamin B2 waste water reclaiming integrated conduct method and device Download PDFInfo
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- CN106477795A CN106477795A CN201611029443.9A CN201611029443A CN106477795A CN 106477795 A CN106477795 A CN 106477795A CN 201611029443 A CN201611029443 A CN 201611029443A CN 106477795 A CN106477795 A CN 106477795A
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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
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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
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D475/00—Heterocyclic compounds containing pteridine ring systems
- C07D475/12—Heterocyclic compounds containing pteridine ring systems containing pteridine ring systems condensed with carbocyclic rings or ring systems
- C07D475/14—Benz [g] pteridines, e.g. riboflavin
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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
- C02F2103/36—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 manufacture of organic compounds
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- Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The present invention relates to a kind of vitamin B2 waste water reclaiming integrated conduct method and device, belong to field of waste water treatment, step includes：Vitamin B2 production waste water sends into nanofiltration membrane after adjusting pH, vitamin B2 major part is trapped, vitamin B2 fermentation waste water is divided into nanofiltration membrane concentrate and nanofiltration membrane permeate two parts by nanofiltration membrane, nanofiltration membrane concentrate is sent into ceramic micro filter membranous system and is concentrated further, the ceramic micro filter film concentrate of acquisition is obtained vitamin B2 product through recrystallization, nanofiltration membrane permeate is sent into organic nanofiltration membrane and is processed further, waste water through organic nanofiltration membrane is re-fed into vapo(u)rization system process, obtain distilled water and sodium chloride crystal salt, the waste water retained by organic nanofiltration membrane is all returned leading portion with ceramic micro filter film permeate and is mixed reprocessing with raw water.The present invention not only solves vitamin B2 waste water intractable problem, and turns waste into wealth, and reclaims vitamin B2 in waste water, salt and water, and the rate of recovery is high.
Description
Technical field
The present invention relates to a kind of vitamin B2 waste water reclaiming integrated conduct method and device, more particularly to a kind of UF membrane
The method and device of technical finesse vitamin B2 waste water.
Background technology
Vitamin B2 is riboflavin again, is the important component part of internal yellow enzymes prothetic group, when lacking, just affects body
Biological oxidation, make metabolism occur obstacle.Used as vitamin B2 big producing country, yield accounts for the 40% of global yield for China.Mesh
Before, widely used microbe fermentation method industrial production vitamin B2 both at home and abroad, its industrial fermentation are generally second order fermentation, its life
Produce concentration of organic wastewater high, COD is up to more than 10000mg/L, salt content belongs to intractable high concentration organic waste in 10-20%
Water.With pay attention to day by day of the China to environmental issue, how to realize the process of vitamin B2 wastewater to reach standard becomes its production of restriction
The key issue of enterprise development.
At present, the domestic research report with regard to vitamin B2 waste water reclaiming integrated conduct method is few.
ZL201220493361.0 proposes a kind of handling process based on biochemical process combination Ozonation, and vitamin B2 production is useless
Water enters HAF anaerobic reation pool and enters anaerobic reaction after entering water distribution regulating reservoir water distribution, reacted waste water enters FSBBR and wanders about as a refugee
Biological reaction pool carries out biological respinse of wandering about as a refugee, and bio-chemical effluent enters ozone oxidation pond and carries out ozone oxidation, and ozone oxidation water outlet is entered
Entering bis- biological treatment tanks of TBF carries out secondary biochemical treatment, enters back into sedimentation basin precipitation, and final waste water is discharged by delivery port；King
Few person of outstanding talent etc. reports useless using the group technology process high concentration vitamin B2 production of Fe/C pretreatment+biochemistry+ozone charcoal
Water, Fe/C pretreatment effectively remove the SS (i.e. suspension) in waste water, and anaerobism efficiently removes COD with aerobic biochemical treatment, then
COD is removed further by ozone high grade oxidation and biological activated carbon, effluent color dilution is all removed, and reaches discharge standard.But
It is that above two method is main process all using biochemical process, and vitamin B2 waste water often contains larger amount of salinity, higher
Salt branch suppression microorganism growth and breeding, so, the technique based on biochemical process is still in the experimental study stage, and above-mentioned
Two methods are not reclaimed to vitamin B2, salt and water, cause the wasting of resources all with qualified discharge as index.
Content of the invention
The technical problem of the solution of the present invention is that existing biochemical process cannot be applied to the higher vitamin B2 of salt content and give up
Recycling of water resource integrated treatment, and the irretrievable drawback of the vitamin B2 product in waste water, it is an object of the invention to provide
A kind of utilization membrane separation technique is realized waste water classification, vitamin B2 and concentrates the vitamin B2 production waste water money with Sewage advanced treatment
Source integrated conduct method.
Specific technical scheme is as follows：
A kind of vitamin B2 waste water reclaiming integrated conduct method, comprises the steps：
1st step, is sent in NF membrane by the waste water produced during fermentation method production vitamin B2 and is concentrated, obtain nanofiltration saturating
Liquid and nanofiltration concentrate is crossed, nanofiltration permeate liquid is recycled inorganic salts after pervaporation；
2nd step, nanofiltration concentrate is re-fed into being concentrated in microfiltration membranes, obtains micro-filtration concentrate and micro-filtration permeate；
3rd step, after micro-filtration concentrate being carried out again recrystallize, drying, obtains vitamin B2.
In one embodiment, NF membrane refers to two grades of NF membrane, and the first order is nanofiltration membrane, and the second level is organic receiving
Filter membrane.
In one embodiment, the concentrate of the NF membrane of the second level is back to the NF membrane of the first order and carries out at filtration
Reason.
In one embodiment, micro-filtration permeate is back in NF membrane carries out filtration treatment.
In one embodiment, need first to add alkali to adjust to after 4～6 the pH of waste water in the 1st step, be re-fed into NF membrane.
In one embodiment, in the 1st step waste water Cobastab2Concentration is 0.5～3g/L.
A kind of vitamin B2 waste water reclaiming Integrated Processing Unit, includes：NF membrane, microfiltration membranes, the infiltration of NF membrane
Side is connected with vaporising device, and the retention side of NF membrane is connected with microfiltration membranes entrance, the feed liquid for retaining side and microfiltration membranes of NF membrane
Entrance connects, and the retention side of microfiltration membranes is connected with crystallization apparatus, and the per-meate side of microfiltration membranes is connected with the feed liquid port of NF membrane.
Described NF membrane refers to two grades of NF membrane, and the per-meate side of first order NF membrane is entered with the feed liquid of second level NF membrane
Mouth connection, the retention side of second level NF membrane are connected with the feed liquid port of first order NF membrane.
Described first order NF membrane is nanofiltration membrane；Described second level NF membrane is organic nanofiltration membrane.
Setting is adjusted in device with pH is also included, be adjusted for the pH of the waste water to entering NF membrane.
Beneficial effect
Membrane separation technique is incorporated into Cobastab by the present invention2In wastewater treatment, advanced technology, efficiently solve Cobastab2Useless
The intractable problem of water, the what is more important present invention is truly realized utilization of wastewater resource, not only by cycling utilization of wastewater,
Cobastab in waste water has also been reclaimed in high yield2, sodium chloride salt and water, environment benefits and economic gains are obvious.
Description of the drawings
Fig. 1 is Cobastab of the present invention2Waste water reclaiming integrated conduct method schematic diagram.
Specific embodiment
For a further understanding of the present invention, the preferred embodiment of the invention is described with reference to embodiment, but
It should be appreciated that these descriptions are simply for further illustrating the features and advantages of the present invention, rather than to the claims in the present invention
Limit.
1 the present invention will be described in detail below in conjunction with the accompanying drawings：
The fermentation waste water got off from production workshop section (pH about 2～3) is added alkali to adjust pH4～6 by the present invention first, is returned with back segment
Ceramic micro filter film permeate, organic nanofiltration membrane concentrate mixing after send into nanofiltration membranous system, nanofiltration membrane aperture
1nm, film efficiently separate layer for titanium oxide, zirconium oxide material, 1.0～4.0MPa of operating pressure；Nanofiltration membrane can be by dimension life
Plain B2 and other small molecular weight impurities（The organic impurities of molecular weight very little and inorganic salts）Separate, after classification, nanofiltration membrane is dense
Cobastab in contracting liquid2Concentration is 5～15g/L, Cobastab in nanofiltration membrane permeate2Concentration ＜ 300mg/L；Nanofiltration
The permeate of membranous system is sent into organic nanofiltration membrane system and is processed further, to reclaim a small amount of vitamin B2 therein, organic nanofiltration
100～500Da of retaining molecular weight, 1.0～4.0MPa of operating pressure, through Cobastab in the waste water of organic nanofiltration membrane2
Content ＜ 10mg/L, then process through vapo(u)rization system, it is divided into distilled water and inorganic salts（Predominantly sodium chloride）, its distilled water is used as life
Fisheries water is recycled, and sodium chloride salt can sell as byproduct, the waste water that retained by organic nanofiltration membrane return leading portion with
Nanofiltration membrane reprocessing is sent into after raw water mixing.
The concentrate of nanofiltration membranous system（The concentrate of first order NF membrane）Send into ceramic micro filter membranous system to concentrate again,
Ceramic micro filter 50～200nm of membrane aperture, membrane material selective oxidation titanium, zirconium oxide, aluminum oxide, operating pressure 0.1～
0.5MPa, using ceramic micro filter film by Cobastab2Content is concentrated into more than 30g/L, and microfiltration membranes can be by a part of glue
Body, protein impurities are passed through, and improve the recovery purity of vitamin B2, are required when concentrate meets recrystallization, are obtained through recrystallization
Cobastab2Product, permeate is returned sends into nanofiltration membrane reprocessing with raw water after leading portion is mixed.
Embodiment 1
S1：Cobastab in the fermentation waste water (pH about 2～3) got off from production workshop section2Concentration is 1.13g/L, returns with back segment
Ceramic micro filter film permeate, organic nanofiltration membrane concentrate mixing after Cobastab2Concentration is 1.11g/L, with liquid adjusting PH with base extremely first
5, it is then fed into nanofiltration membranous system, nanofiltration membrane aperture 1nm, control operation pressure 2.0MPa, film average flux 76L/
m2H, Cobastab2It is trapped, Cobastab in the concentrate of retention2Concentration 10.3g/L, Cobastab in permeate2Concentration
76mg/L；
S2：The concentrate of nanofiltration membranous system is sent into ceramic micro filter membranous system and is concentrated again, ceramic micro filter membrane aperture 50nm, control
Operating pressure 0.2MPa, film average flux 304L/m2H, ceramic micro filter film can retain suspension Cobastab completely2, retention
Cobastab in concentrate2Concentration 31.5g/L, concentrate meet recrystallization and require, Cobastab are obtained through recrystallization2Product, product
Purity is 97.6%, Cobastab in permeate2Concentration 0.98g/L, returns after leading portion is mixed with raw water and sends into nanofiltration membrane again
Process；
S3：The permeate of nanofiltration membranous system is sent into organic nanofiltration membrane system and is processed further, and organic nanofiltration membrane retains molecule
Measure as 200Da, control operation pressure 2.5MPa, film average flux 20.6L/m2H, through dimension life in the waste water of organic nanofiltration membrane
Plain B2Content 5mg/L, then process through vapo(u)rization system, it is divided into distilled water and sodium chloride salt, its distilled water is circulated as industrial water
Utilize, sodium chloride salt can sell as byproduct, Cobastab in the waste water retained by organic nanofiltration membrane20.95 g/ of content
L, returns and sends into nanofiltration membrane reprocessing after leading portion is mixed with raw water.
Embodiment 2
S1：Cobastab in the fermentation waste water (pH about 2～3) got off from production workshop section2Concentration is 2.74g/L, returns with back segment
Ceramic micro filter film permeate, organic nanofiltration membrane concentrate mixing after Cobastab2Concentration is 2.43g/L, with liquid adjusting PH with base extremely first
6, it is then fed into nanofiltration membranous system, nanofiltration membrane aperture 2nm, control operation pressure 3.5MPa, membrane flux 85L/m2·
H, Cobastab2It is trapped, Cobastab in the concentrate of retention2Concentration 14.3g/L, Cobastab in permeate2Concentration 89mg/L；
S2：The concentrate of nanofiltration membranous system is sent into ceramic micro filter membranous system and is concentrated again, ceramic micro filter membrane aperture 200nm, control
Operating pressure 0.35MPa processed, film average flux 352L/m2H, ceramic micro filter film can retain suspension Cobastab completely2, retention
Concentrate in Cobastab2Concentration 42.1g/L, concentrate meet recrystallization and require, Cobastab are obtained through recrystallization2Product, produces
Product purity is 97.2%, Cobastab in permeate2Concentration 0.99g/L, returns after leading portion is mixed with raw water and sends into nanofiltration membrane
Reprocessing；
S3：The permeate of nanofiltration membranous system is sent into organic nanofiltration membrane system and is processed further, and organic nanofiltration membrane retains molecule
Measure as 400Da, control operation pressure 3.0MPa, film average flux 25.3L/m2H, through dimension life in the waste water of organic nanofiltration membrane
Plain B2Content 8mg/L, then process through vapo(u)rization system, it is divided into distilled water and sodium chloride salt, its distilled water is circulated as industrial water
Utilize, sodium chloride salt can sell as byproduct, Cobastab in the waste water retained by organic nanofiltration membrane20.93 g/ of content
L, returns and sends into nanofiltration membrane reprocessing after leading portion is mixed with raw water.
Embodiment 3
S1：Cobastab in the fermentation waste water (pH about 2～3) got off from production workshop section2Concentration is 0.84g/L, returns with back segment
Ceramic micro filter film permeate, organic nanofiltration membrane concentrate mixing after Cobastab2Concentration is 0.86g/L, with liquid adjusting PH with base extremely first
6, it is then fed into nanofiltration membranous system, nanofiltration membrane aperture 1nm, control operation pressure 1.5MPa, film average flux 81L/
m2H, Cobastab2It is trapped, Cobastab in the concentrate of retention2Concentration 11.2g/L, Cobastab in permeate2Concentration
85mg/L；
S2：The concentrate of nanofiltration membranous system is sent into ceramic micro filter membranous system and is concentrated again, ceramic micro filter membrane aperture 200nm, control
Operating pressure 0.1MPa processed, film average flux 256L/m2H, ceramic micro filter film can retain suspension Cobastab completely2, retention
Concentrate in Cobastab2Concentration 34.2g/L, concentrate meet recrystallization and require, Cobastab are obtained through recrystallization2Product, produces
Product purity is 98.4%, Cobastab in permeate2Concentration 0.98g/L, returns after leading portion is mixed with raw water and sends into nanofiltration membrane
Reprocessing；
S3：The permeate of nanofiltration membranous system is sent into organic nanofiltration membrane system and is processed further, and organic nanofiltration membrane retains molecule
Measure as 100Da, control operation pressure 2.0MPa, film average flux 16.8L/m2H, through dimension life in the waste water of organic nanofiltration membrane
Plain B2Content 4mg/L, then process through vapo(u)rization system, it is divided into distilled water and sodium chloride salt, its distilled water is circulated as industrial water
Utilize, sodium chloride salt can sell as byproduct, Cobastab in the waste water retained by organic nanofiltration membrane20.95 g/ of content
L, returns and sends into nanofiltration membrane reprocessing after leading portion is mixed with raw water.
Reference examples 1
Difference with embodiment 3 is：Fermentation waste water is to enter to be concentrated in microfiltration membranes first, then the permeate by microfiltration membranes
It is back to nanofiltration membrane system.
S1：Cobastab in the fermentation waste water (pH about 2～3) got off from production workshop section2Concentration is 0.84g/L, with back segment
Cobastab after the nanofiltration membrane concentrate of return, the mixing of organic nanofiltration membrane concentrate2Concentration is 0.95g/L, is first adjusted with liquid caustic soda
PH is then fed into ceramic micro filter membranous system and is concentrated to 6, ceramic micro filter membrane aperture 200nm, control operation pressure 0.1MPa,
Film average flux 256L/m2H, ceramic micro filter film can retain suspension Cobastab completely2, Cobastab in the concentrate of retention2
Concentration 27.2g/L, concentrate meet recrystallization and require, Cobastab are obtained through recrystallization2Product, product purity are 93.2%, thoroughly
Cross Cobastab in liquid2Concentration 1.42g/L, returns into nanofiltration membrane concentration again；
S2：Nanofiltration membranous system is entered to by the penetrating fluid of ceramic micro filter film to be concentrated, nanofiltration membrane aperture 1nm, control
Operating pressure 1.5MPa processed, film average flux 57L/m2H, Cobastab2It is trapped, Cobastab in the concentrate of retention2Concentration
13.7g/L, Cobastab in permeate2Concentration 97mg/L；
S3：The permeate of nanofiltration membranous system is sent into organic nanofiltration membrane system and is processed further, and organic nanofiltration membrane retains molecule
Measure as 100Da, control operation pressure 2.0MPa, film average flux 11.3L/m2H, through dimension life in the waste water of organic nanofiltration membrane
Plain B2Content 6mg/L, then process through vapo(u)rization system, it is divided into distilled water and sodium chloride salt, its distilled water is circulated as industrial water
Utilize, sodium chloride salt can sell as byproduct, Cobastab in the waste water retained by organic nanofiltration membrane21.15 g/ of content
L, returns and reprocesses into nanofiltration membrane.
Can be seen that with reference examples by embodiment and waste water is concentrated initially with NF membrane, reach can feed liquid
Concentrated by microfiltration membranes further to after finite concentration again, microfiltration membranes surface can be made faster to form cake layer crown_interception is played,
Improve the yield of vitamin B2.
Reference examples 2
Difference with embodiment 3 is：Waste water is adjusted without pH before nanofiltration membrane system is carried out.
S1：Cobastab in the fermentation waste water (pH about 2～3) got off from production workshop section2Concentration is 0.84g/L, with back segment
Cobastab after the ceramic micro filter film permeate of return, the mixing of organic nanofiltration membrane concentrate2Concentration is 0.86g/L, sends into pottery and receives
Filter membrane system, nanofiltration membrane aperture 1nm, control operation pressure 1.5MPa, film average flux 75L/m2H, Cobastab2Cut
Stay, Cobastab in the concentrate of retention2Concentration 10.4g/L, Cobastab in permeate2Concentration 115mg/L；
S2：The concentrate of nanofiltration membranous system is sent into ceramic micro filter membranous system and is concentrated again, ceramic micro filter membrane aperture 200nm, control
Operating pressure 0.1MPa processed, film average flux 212L/m2H, ceramic micro filter film can retain suspension Cobastab completely2, retention
Concentrate in Cobastab2Concentration 30.4g/L, concentrate meet recrystallization and require, Cobastab are obtained through recrystallization2Product, produces
Product purity is 95.4%, Cobastab in permeate2Concentration 1.38g/L, returns after leading portion is mixed with raw water and sends into nanofiltration membrane
Reprocessing；
S3：The permeate of nanofiltration membranous system is sent into organic nanofiltration membrane system and is processed further, and organic nanofiltration membrane retains molecule
Measure as 100Da, control operation pressure 2.0MPa, film average flux 13.3L/m2H, through dimension life in the waste water of organic nanofiltration membrane
Plain B2Content 9mg/L, then process through vapo(u)rization system, it is divided into distilled water and sodium chloride salt, its distilled water is circulated as industrial water
Utilize, sodium chloride salt can sell as byproduct, Cobastab in the waste water retained by organic nanofiltration membrane20.82 g/ of content
L, returns and sends into nanofiltration membrane reprocessing after leading portion is mixed with raw water.
As can be seen that after being adjusted to the pH of waste water, being improved effectively the flux of microfiltration membranes, and make product
Product purity is improved.
Claims (10)
1. a kind of vitamin B2 waste water reclaiming integrated conduct method, it is characterised in that comprise the steps：
1st step, is sent in NF membrane by the waste water produced during fermentation method production vitamin B2 and is concentrated, obtain nanofiltration saturating
Liquid and nanofiltration concentrate is crossed, nanofiltration permeate liquid is recycled inorganic salts after pervaporation；
2nd step, nanofiltration concentrate is re-fed into being concentrated in microfiltration membranes, obtains micro-filtration concentrate and micro-filtration permeate；
3rd step, after micro-filtration concentrate being carried out again recrystallize, drying, obtains vitamin B2.
2. vitamin B2 waste water reclaiming integrated conduct method according to claim 1, it is characterised in that NF membrane is referred to
Two grades of NF membrane, the first order is nanofiltration membrane, and the second level is organic nanofiltration membrane.
3. vitamin B2 waste water reclaiming integrated conduct method according to claim 1, it is characterised in that the receiving of the second level
The concentrate of filter membrane is back to the NF membrane of the first order and carries out filtration treatment.
4. vitamin B2 waste water reclaiming integrated conduct method according to claim 1, it is characterised in that micro-filtration permeate
Being back in NF membrane carries out filtration treatment.
5. vitamin B2 waste water reclaiming integrated conduct method according to claim 1, it is characterised in that need in the 1st step
First the pH of waste water to be added alkali to adjust to after 4～6, be re-fed into NF membrane.
6. vitamin B2 waste water reclaiming integrated conduct method according to claim 1, it is characterised in that give up in the 1st step
The Cobastab of water2Concentration is 0.5～3g/L.
7. a kind of vitamin B2 waste water reclaiming Integrated Processing Unit, it is characterised in that include：NF membrane, microfiltration membranes, nanofiltration
The per-meate side of film is connected with vaporising device, and the retention side of NF membrane is connected with microfiltration membranes entrance, the retention side of NF membrane and micro-filtration
The feed liquid port connection of film, the retention side of microfiltration membranes is connected with crystallization apparatus, the per-meate side of microfiltration membranes and the feed liquid of NF membrane
Entrance connects.
8. vitamin B2 waste water reclaiming Integrated Processing Unit according to claim 7, it is characterised in that described nanofiltration
Film refers to two grades of NF membrane, and the per-meate side of first order NF membrane is connected with the feed liquid port of second level NF membrane, second level nanofiltration
The retention side of film is connected with the feed liquid port of first order NF membrane.
9. vitamin B2 waste water reclaiming Integrated Processing Unit according to claim 7, it is characterised in that described first
Level NF membrane is nanofiltration membrane；Described second level NF membrane is organic nanofiltration membrane.
10. vitamin B2 waste water reclaiming Integrated Processing Unit according to claim 7, it is characterised in that use in device
Also include pH and setting is adjusted, be adjusted for the pH of the waste water to entering NF membrane.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109081478A (en) * | 2018-09-15 | 2018-12-25 | 南京霄祥工程技术有限公司 | A kind for the treatment of process of fermentation waste water |
| CN109133398A (en) * | 2018-09-13 | 2019-01-04 | 陕西师范大学 | A kind of de- misery recycling processing method of semen armeniacae amarae |
| CN109179575A (en) * | 2018-07-27 | 2019-01-11 | 青海省化工设计研究院有限公司 | The method and application of floating agent in a kind of enriching and recovering brine |
| CN114075013A (en) * | 2020-08-12 | 2022-02-22 | 南京同畅新材料研究院有限公司 | Treatment process and system for wastewater generated in vitamin B2 fermentation process |
| CN114075013B (en) * | 2020-08-12 | 2024-05-28 | 南京同畅新材料研究院有限公司 | Treatment process and system for wastewater generated in vitamin B2 fermentation process |
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