CN108947101A - A method of processing vitamin produces waste water - Google Patents
A method of processing vitamin produces waste water Download PDFInfo
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- CN108947101A CN108947101A CN201810652459.8A CN201810652459A CN108947101A CN 108947101 A CN108947101 A CN 108947101A CN 201810652459 A CN201810652459 A CN 201810652459A CN 108947101 A CN108947101 A CN 108947101A
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- production waste
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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
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/30—Alkali metal phosphates
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/26—Phosphates
- C01B25/30—Alkali metal phosphates
- C01B25/308—Methods for converting an alkali metal orthophosphate into another one; Purification; Decolorasing; Dehydrating; Drying
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/048—Purification of waste water by evaporation
-
- 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
- C02F1/22—Treatment of water, waste water, or sewage by freezing
-
- 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
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/74—Treatment of water, waste water, or sewage by oxidation with air
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/12—Halogens or halogen-containing compounds
-
- 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
- C02F2101/36—Organic compounds containing halogen
-
- 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
- C02F2101/38—Organic compounds containing nitrogen
-
- 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
-
- 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
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses a kind of methods of processing vitamin production waste water.This method includes the following steps: that vitamin is produced Catalytic Wet Air Oxidation for Wastewater by (1)；(2) vitamin production wastewater oxidation liquid is subjected to freezing and crystallizing, obtains disodium hydrogen phosphate after separation of solid and liquid；(3) liquid separated after freezing and crystallizing is subjected to film concentration；(4) obtained permeate is concentrated to film and carries out chemical dephosphorization；(5) permeate after the chemical dephosphorization is evaporated except sodium chloride salt；(6) waste liquid after evaporation is subjected to catalytic wet oxidation；(7) evaporation condensate of waste liquid oxidation solution is subjected to biochemical treatment.Method of the invention utilizes based on catalytic wet oxidation technology, this waste water of the process such as coupling crystallization, film concentration, entire technique accomplishes salinity in resource utilization recycling waste water, achievees the purpose that zero-emission.
Description
Technical field
The present invention relates to environment-friendly engineering technical field more particularly to a kind of methods of processing vitamin production waste water.
Background technique
Since vitamin drug variety is various, in medicine production process, plurality of raw materials need to be used, production technology is again more multiple
It is miscellaneous, thus waste water composition is also sufficiently complex, raw water organic concentration is higher, and COD is up to tens of thousands of mg/L, and serious is more than country's discharge
Standard.Such as vitamin B11, it is also folic acid, waste water color is deep, complicated composition, main hydrochloric, pyridine, p-benzoyl
Glutamic acid, sodium chloride, trichloroacetone, hardly-biodegradable.Comprehensive whole factory's waste water, waste water contain a large amount of phosphate and sodium chloride,
It is whole that sticky liquid is presented.
The active carbon adsorption of common physico-chemical process, flocculation sedimentation, chemical oxidization method, ion exchange both at home and abroad
Method and ultrafiltration membrance filter method.Physical-chemical process is pure higher in processing cost and is unable to degradation of organic substances, the one kind only polluted
The problem of being concentrated or shifting, may cause secondary pollution.Traditional biochemical degradation hair, it is very high to the BOD degradation rate in water, still
When handling the organic matter of hardly-biodegradable, removal rate is lower, and biochemical method does not tolerate high-salt wastewater, generally requires with low
Concentration water or tap water dilution several times or number decades of times, cause treatment scale to expand, total processing cost is high.
Current chemical oxidization method, mostly uses Fe-C Micro Electrolysis Method and Ozonation, and both methods can degrade
A part of organic matter, but the removal efficiency for being up to tens of thousands of mg/L for COD is not high, and Fe-C Micro Electrolysis Method consumption is more
Hydrogen peroxide and soda acid, yet form more sludge, form solid waste, the expense of processing is caused to increase.Ozonation oxidation
Ability is strong, without secondary pollution to decoloration, deodorization, sterilization, removal organic matter and inorganic matter and other effects, its shortcoming is that manufacture is smelly
The power consumption of oxygen demand is big, and about 20~35 degree of power consumption of per kilogram ozone, processing cost is high.
Summary of the invention
It is an object of the present invention to be directed to the above-mentioned deficiency of the prior art, a kind of easy to operate, good processing of effect is proposed
The method of vitamin production waste water.
A method of processing vitamin produces waste water, includes the following steps:
(1) vitamin is produced into Catalytic Wet Air Oxidation for Wastewater；
(2) vitamin production wastewater oxidation liquid is subjected to freezing and crystallizing, obtains disodium hydrogen phosphate after separation of solid and liquid；
(3) liquid separated after freezing and crystallizing is subjected to film concentration；
(4) obtained permeate is concentrated to film and carries out chemical dephosphorization；
(5) permeate after the chemical dephosphorization is evaporated except sodium chloride salt；
(6) waste liquid after evaporation is subjected to catalytic wet oxidation；
(7) evaporation condensate of waste liquid oxidation solution is subjected to biochemical treatment.
Preferably, vitamin production waste water is set in reaction temperature setting in 160 DEG C~300 DEG C, reaction pressure in step (1)
It sets in 6.0~9.9Mpa, air supply amount (Nm3/ h)/wastewater flow rate (m3/ h) be arranged under 100 times~200 times of reaction condition into
Row catalytic wet oxidation.
Preferably, the crystallization temperature of phosphorus-containing wastewater oxidation solution is -5~10 DEG C in step (2).
Preferably, it is separated by solid-liquid separation after crystallization, to crystal salt using 0~5 DEG C of cold water washing, removes impurity, obtain technical grade ten
Phosphate dihydrate disodium hydrogen.
Preferably, membrane technology uses nanofiltration membrane in step (3).
Preferably, except multiple-effect evaporation or MVR can be selected in chlorination sodium salt method in step (5).
Preferably, the catalyst in step (6) is bimetal Cu-Ag nano particle.
A kind of method of processing vitamin production waste water of the invention utilizes based on catalytic wet oxidation technology, coupling knot
This waste water of the process such as brilliant, film concentration.It is different according to its salinity property, using freezing and crystallizing rephosphorization hydrochlorate, tied using evaporation
Crystalline substance processing sodium chloride brine, using membrane technology condensed phosphate salt and Isolating chlorinated sodium.For the difficult drop for evaporating last concentrate
Organic matter is solved, intensive treatment is carried out using catalytic wet oxidation, completely removes organic matter.The evaporation condensate of output can be used as
Process water, entire technique accomplish salinity in resource utilization recycling waste water, achieve the purpose that zero-emission.
Specific embodiment
The following is specific embodiments of the present invention, and technical scheme of the present invention will be further described, but the present invention is simultaneously
It is not limited to these embodiments.
Certain plant produced multivitamin generates waste water, this waste water total phosphorus is more than 20000 after purification and concentration
Mg/L, COD50000mg/L, sodium chloride 18%.
Using the waste water is first pre-oxidized, Organic oxidation difficult to degrade therein is made to be degraded into small organic molecule, part is straight
It connects and is oxidized to CO2, water, convenient for salt extraction；Wherein the setting of catalytic wet oxidation reaction temperature is at 160 DEG C, reaction pressure 6.0
Mpa, air supply amount (Nm3/ h)/wastewater flow rate (m3/ h) 100 times.
It is crystallized using freezing and crystallizing technology, obtains qualified industrial phosphoric acid salt after filtering cleaning.Freezing and crystallizing charging
Total phosphorus input concentration 10000mg/L, pH8, crystallization temperature -5~10 DEG C are separated by solid-liquid separation after crystallization, need to crystal salt using 5
DEG C cold water washes twice, and removes impurity, obtains industrial grade disodium hydrogen phosphate.
Phosphate can be further processed using recrystallization technology, go the desalination major part crystallization water convenient for storage and fortune
It is defeated.Its process is first by disodium hydrogen phosphate heating melting, and temperature is 50 DEG C, then by the phosphoric acid salt water after melting by steaming
Hair recrystallization, temperature are 70 DEG C.Recrystallization selection MVR technology, consumes energy low.Ten phosphate dihydrates of higher purity available in this way
Disodium hydrogen.
Using membrane technology condensed phosphate salt, film concentrate returns oxidation, and film permeate is low phosphorous sodium chloride waste water.This is phosphorous
Waste water phosphate and sodium chloride waste water containing high concentration simultaneously, using nanofiltration membrane, phosphatic cycles of concentration is 4 times.
Permeate dephosphorization using chemical dephosphorization method to film, removes a small amount of phosphate, improves the purity of sodium chloride；Chemistry
Dephosphorization reagent can be used general dephosphorization agent and complete.
It is evaporated after not phosphorous wastewater oxidation liquid is mixed with salt water after chemical dephosphorization except sodium chloride salt.Evaporation removes
Multiple-effect evaporation or MVR can be selected in salt method.The condensate liquid of this evaporation technology output evaporation, the evaporation raffinate and salt of saturated salt.
The nano particle of bimetal Cu-Ag containing catalyst is removed after the raffinate of evaporation is diluted with part evaporation condensate
Catalytic wet oxidation device carries out deep oxidation, and thoroughly degradation pre-oxidizes organic matter difficult to degrade, is oxidized to CO2, N2With
H2O.There are many catalyst types, herein without limitation.
The catalytic wet oxidation liquid that catalyst is added is pooled to evaporation devaporation；After evaporation condensate is carried out biochemical treatment
Measure the phosphorus 1mg/L of gained liquid, COD100mg/L, sodium chloride 2%.
Embodiment 1,2,3,4 and 1,2,3,4 treatment process of comparative example are as above, and the evaporation that operating condition measures output is cold
The COD of lime set is as follows:
Table 1 is the process condition of the present embodiment and comparative example and treated waste water table
As can be known from the above table, the technique of the waste liquid produced using processing second chlorine of the invention can effectively degrade organic in waste liquid
Object, obtained waste water meet the standard of industrial water drainage.
It is not directed to place above, is suitable for the prior art.
Although some specific embodiments of the invention are described in detail by example, the skill of this field
Art personnel it should be understood that above example merely to be illustrated, the range being not intended to be limiting of the invention, belonging to the present invention
Those skilled in the art can make various modifications or additions to described specific embodiment or using class
As mode substitute, but without departing from direction of the invention or beyond the scope of the appended claims.Ability
Domain it is to be understood by the skilled artisans that according to the technical essence of the invention to made by embodiment of above it is any modification, etc.
With replacement, improvement etc., protection scope of the present invention should be included in.
Claims (7)
1. a kind of method of processing vitamin production waste water, characterized by the following steps:
Vitamin is produced into Catalytic Wet Air Oxidation for Wastewater；
Vitamin production wastewater oxidation liquid is subjected to freezing and crystallizing, obtains disodium hydrogen phosphate after separation of solid and liquid；
The liquid separated after freezing and crystallizing is subjected to film concentration；
Obtained permeate is concentrated to film and carries out chemical dephosphorization；
Permeate after the chemical dephosphorization is evaporated except sodium chloride salt；
Waste liquid after evaporation is subjected to catalytic wet oxidation；
The evaporation condensate of waste liquid oxidation solution is subjected to biochemical treatment.
2. a kind of method of processing vitamin production waste water as described in claim 1, it is characterised in that: dimension life in step (1)
Element production waste water is arranged in reaction temperature and is arranged in 160 DEG C~300 DEG C, reaction pressure in 6.0~9.9Mpa, air supply amount
(Nm3/ h)/wastewater flow rate (m3/ h) it is arranged under 100 times~200 times of reaction condition and carries out catalytic wet oxidation.
3. a kind of method of processing vitamin production waste water as described in claim 1, it is characterised in that: phosphorous in step (2)
The crystallization temperature of wastewater oxidation liquid is -5~10 DEG C.
4. a kind of method of processing vitamin production waste water as claimed in claim 3, it is characterised in that: solid-liquid point after crystallization
From to crystal salt using 0~5 DEG C of cold water washing, removal impurity obtains industrial grade disodium hydrogen phosphate.
5. a kind of method of processing vitamin production waste water as described in claim 1, it is characterised in that: film skill in step (3)
Art uses nanofiltration membrane.
6. a kind of method of processing vitamin production waste water as described in claim 1, it is characterised in that: dechlorination in step (5)
Changing sodium salt method can be selected multiple-effect evaporation or MVR.
7. a kind of method of processing vitamin production waste water as described in claim 1, it is characterised in that: urging in step (6)
Agent is bimetal Cu-Ag nano particle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810652459.8A CN108947101A (en) | 2018-06-22 | 2018-06-22 | A method of processing vitamin produces waste water |
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| CN201810652459.8A CN108947101A (en) | 2018-06-22 | 2018-06-22 | A method of processing vitamin produces waste water |
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| CN108947101A true CN108947101A (en) | 2018-12-07 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110683695A (en) * | 2019-09-20 | 2020-01-14 | 浙江奇彩环境科技股份有限公司 | Glycine wastewater recycling treatment process |
| CN110818160A (en) * | 2019-09-12 | 2020-02-21 | 浙江奇彩环境科技股份有限公司 | Treatment process of high-salt high-COD wastewater |
| CN112340716A (en) * | 2019-08-09 | 2021-02-09 | 成都泰永辰环保科技有限公司 | Method for recycling electrode foil formation phosphoric acid waste liquid |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041649A (en) * | 2007-04-10 | 2007-09-26 | 三达膜科技（厦门）有限公司 | Production method of reclaiming vitamin C and gulonic acid from vitamin C mother liquid |
| CN102786187A (en) * | 2012-08-17 | 2012-11-21 | 四川省乐山市福华通达农药科技有限公司 | Integrated process for recycling glyphosate mother liquor |
| CN105417827A (en) * | 2015-12-31 | 2016-03-23 | 杭州深瑞水务有限公司 | Chemical waste water treatment device and method |
| KR101671756B1 (en) * | 2016-03-10 | 2016-11-17 | 효림산업주식회사 | Remediation system of groundwater contaminants by pumping and treatment, oxidation treatment and reverse osmosis membrane |
| CN108128961A (en) * | 2018-01-25 | 2018-06-08 | 东莞市圆明生物科技有限公司 | Brine waste zero emission method and system |
-
2018
- 2018-06-22 CN CN201810652459.8A patent/CN108947101A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101041649A (en) * | 2007-04-10 | 2007-09-26 | 三达膜科技（厦门）有限公司 | Production method of reclaiming vitamin C and gulonic acid from vitamin C mother liquid |
| CN102786187A (en) * | 2012-08-17 | 2012-11-21 | 四川省乐山市福华通达农药科技有限公司 | Integrated process for recycling glyphosate mother liquor |
| CN105417827A (en) * | 2015-12-31 | 2016-03-23 | 杭州深瑞水务有限公司 | Chemical waste water treatment device and method |
| KR101671756B1 (en) * | 2016-03-10 | 2016-11-17 | 효림산업주식회사 | Remediation system of groundwater contaminants by pumping and treatment, oxidation treatment and reverse osmosis membrane |
| CN108128961A (en) * | 2018-01-25 | 2018-06-08 | 东莞市圆明生物科技有限公司 | Brine waste zero emission method and system |
Non-Patent Citations (1)
| Title |
|---|
| 温洪宇: "《高盐度含酚废水的生物处理技术》", 31 March 2018, 中国矿业大学出版社 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112340716A (en) * | 2019-08-09 | 2021-02-09 | 成都泰永辰环保科技有限公司 | Method for recycling electrode foil formation phosphoric acid waste liquid |
| CN110818160A (en) * | 2019-09-12 | 2020-02-21 | 浙江奇彩环境科技股份有限公司 | Treatment process of high-salt high-COD wastewater |
| CN110683695A (en) * | 2019-09-20 | 2020-01-14 | 浙江奇彩环境科技股份有限公司 | Glycine wastewater recycling treatment process |
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Application publication date: 20181207 |