CN109534616A - The processing method of Aspartame production waste water - Google Patents
The processing method of Aspartame production waste water Download PDFInfo
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- CN109534616A CN109534616A CN201811600484.8A CN201811600484A CN109534616A CN 109534616 A CN109534616 A CN 109534616A CN 201811600484 A CN201811600484 A CN 201811600484A CN 109534616 A CN109534616 A CN 109534616A
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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
- C02F1/02—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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
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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
- 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
- C02F3/1263—Sequencing batch reactors [SBR]
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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
- C02F3/28—Anaerobic digestion processes
- C02F3/2846—Anaerobic digestion processes using upflow anaerobic sludge blanket [UASB] reactors
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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
- C02F3/30—Aerobic and anaerobic processes
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- Environmental & Geological Engineering (AREA)
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- Organic Chemistry (AREA)
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- Treatment Of Water By Oxidation Or Reduction (AREA)
Abstract
The present invention relates to field of waste water treatment, in particular to a kind of processing method of Aspartame production waste water.The processing method of Aspartame production waste water, comprising the following steps: pretreated waste water stoste is handled for the first time using Wet Catalytic Oxidation Method, then carries out gas-liquid separation, and be evaporated crystallization using MVR evaporation technique to the liquid that gas-liquid separation obtains.Catalytic wet oxidation technology and evaporative crystallization technique combine, and have not only realized effective degradation of high-enriched organics, but also are able to achieve effectively removing for salinity in waste water, and crystal salt can carry out secondary recovery utilization, have preferable prospects for commercial application.
Description
Technical field
The present invention relates to field of waste water treatment, in particular to a kind of processing method of Aspartame production waste water.
Background technique
Aspartame (Aspartame), molecular formula are as follows: C14H18N5O5, molecular weight 294.30, chemical name are N- α-
L- aspartyl-L-phenylalanine methyl esters is a kind of novel synthesis peptides sweetener, and sugariness is about 200 times of sucrose.At present
The sweetener is approved in more than 100 a countries and regions using applied to the products such as 6000 various beverages, food and medicine neck
Domain.
Currently, the production method of Aspartame is mainly chemical synthesis, raw material uses aspartic acid, phenylalanine substantially
Organic matters are waited, the waste water generated in production process is mainly a kind of typical high saliferous organic wastewater with difficult degradation thereby, mainly includes
The substances such as salt and amino acid, wherein COD is up to tens of thousands of mg/L, and salt content reaches 5% or more.Therefore the useless of Aspartame is solved
The further yield bottleneck opened in production process is made production be circulated benignly by water treatment problems, to generate preferable
Environmental benefit.
Currently, being specifically included that the method for Aspartame production wastewater treatment first is that by being directly entered after Macrodilution
Biochemical system, the disadvantage is that treating capacity can not be controlled effectively, to increase processing cost, furthermore this method can not recycle effectively at
Point；Second is that by film process, but such waste water COD is dense, extremely be easy to cause the pollution of film, thus greatly reduces film
Service life, cause processing cost very big.
Summary of the invention
The present invention provides a kind of processing methods of Aspartame production waste water, can achieve organic efficient degradation and have
The purpose that effect ingredient is recycled.
The present invention is implemented as follows:
A kind of processing method of Aspartame production waste water, comprising the following steps:
Pretreated waste water stoste is handled for the first time using Wet Catalytic Oxidation Method, then carries out gas-liquid separation, and
Crystallization is evaporated using MVR evaporation technique to the liquid that gas-liquid separation obtains.
The beneficial effects of the present invention are: the processing method of Aspartame of the present invention production waste water is by catalytic wet oxidation technology
Combine with evaporative crystallization technique, not only realized effective degradation of high-enriched organics, but also is able to achieve having for salinity in waste water
Effect removal, and crystal salt can carry out secondary recovery utilization, have preferable prospects for commercial application.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described.
Fig. 1 is the process flow chart for the processing method that Aspartame provided in an embodiment of the present invention produces waste water.
Specific embodiment
It in order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below will be in the embodiment of the present invention
Technical solution be clearly and completely described.The person that is not specified actual conditions in embodiment, according to normal conditions or manufacturer builds
The condition of view carries out.Reagents or instruments used without specified manufacturer is the conventional production that can be obtained by commercially available purchase
Product.
The processing method of the Aspartame production waste water of the embodiment of the present invention is specifically described below.
A kind of processing method of Aspartame production waste water, comprising the following steps:
Referring to Fig. 1, waste water stoste is pre-processed first, specifically pretreatment is that waste water stoste is passed through conditioning tank
It is interior, the pH value of waste water stoste is adjusted to 6-8, specifically, is adjusted according to the pH value of waste water stoste using different solution,
If waste water stoste is greater than 8 in alkalinity or pH, the pH value of waste water stoste is adjusted to 6-8 using dilute sulfuric acid, if waste water stoste is in
The pH value of waste water stoste is then adjusted to 6-8 using alkaline matters such as sodium hydroxide or potassium hydroxide less than 6 by acid or pH.Together
When, waste water stoste, which is passed through conditioning tank, to accumulate waste water stoste, and plays the role of buffering, then convenient for control
The treating capacity of every batch of waste water stoste and the flow of waste water stoste.
Then pretreated waste water stoste is preheated, preheating method used in the embodiment of the present invention is will to pre-process
Waste water stoste afterwards is delivered to the height generated in heat exchanger with last secondary Wet Catalytic Oxidation Method by high-pressure material pump
Geothermal liquid carries out heat exchange, can not only be heated, can also be saved to pretreated waste water stoste using aforesaid way
The about energy.
Then Wet Catalytic Oxidation Method handles the waste water stoste after heat exchange for the first time, Wet Catalytic Oxidation Method be
Under high temperature and pressure and the collective effect of catalyst, using molecular oxygen deep oxidation Coal Gas Washing Cycling Water, organic matter difficult to degrade, make
Oxidation operation resolves into CO2、H2O and N2Equal innocuous substances or small organic molecule, the one kind for reaching the purpose that purifies water are advanced
Method for oxidation.Wet Catalytic Oxidation Method can quickly and efficiently handle high-concentration biochemical industrial organic waste water difficult to degrade, have net
Change the features such as high-efficient, process is simple, occupied area is small.
Specifically the waste water stoste after heat exchange is reacted with oxygen mix.Waste water and oxygen are in reactor
It is in contact, oxidation reaction occurs rapidly under the action of catalyst, the oxidative degradation of most organic matters is realized, then at guarantee
Manage effect.
Further, when being reacted, the partial pressure of oxygen is 0.5-2MPa, and reaction temperature is 150-250 DEG C, the reaction time
It is 1-2 hours.The treatment effeciency that can guarantee Wet Catalytic Oxidation Method using above-mentioned condition then ensures degradation effect, reduces
The content of hardly degraded organic substance in waste water.
Further, catalyst is metal oxide supported type catalyst, and metal oxide supported type catalyst includes oxygen
Change any one in copper, manganese oxide, cerium oxide, iron oxide, zinc oxide or nickel oxide or at least two.Using above-mentioned catalyst
It can guarantee that reaction is gone on smoothly, promote reaction rate and efficiency.
Then the high-temp liquid after peroxidization carries out heat exchange, drop with the waste water stoste that next group will be reacted
The temperature of low high-temp liquid, while the temperature of lifting waste water stoste, energy saving.
Then gas-liquid separation is carried out to the liquid after heat exchange, the gas-liquid separator used is gas-liquid in the prior art point
From device, and the tail gas separated high altitude discharge after purification, and the liquid that gas-liquid separation obtains then utilizes MVR evaporation technique
It is evaporated crystallization.And carrying out gas-liquid separation prevents the substance in the liquid after heat exchange from impacting to subsequent MVR steamer.
MVR steam technologies have the advantages such as energy-saving and environmental protection, high degree of automation, occupied area are small, useless handling high saliferous
Water field has apparent advantage.The boiling point of the high organic wastewater of high salt, which rises, at present is normally no higher than 12 DEG C, is very suitable to MVR steaming
Hair technology, an imported compressor can meet heat transfer temperature difference required for evaporation process, and power savings advantages are obvious, steam compared to triple effect
Send out the operating cost that device saves 50% or so.
Further, when being evaporated crystallization, MVR evaporator internal temperature be 50~100 DEG C, internal pressure be 50~
100Kpa, compressor operating temperature are 70~150 DEG C.Crystallization effect can be guaranteed by being evaporated crystallization using above-mentioned condition, and
Reduce energy consumption.
The salt that then evaporative crystallization obtains can be used as secondary Nacl and be recycled, and the remaining liquid of evaporative crystallization
Body enters biochemical unit and carries out biochemical treatment, further removes remaining hard-degraded substance in waste water.
Further, UASB, A/O, A can be used in biochemical treatment2Any one progress in/O, SBR or contact oxidation method
Processing.What the embodiment of the present invention was recorded is only the biochemical processing method that part can use, other biochemistry in the prior art
Processing method also can be used.And the liquid after biochemical treatment is water up to standard, it can be with direct emission.
Feature and performance of the invention are described in further detail with reference to embodiments.
Embodiment 1
The present embodiment provides a kind of processing methods of Aspartame production waste water, comprising the following steps:
The COD value of the present embodiment Aspartame waste water to be processed is 72000mg/L, and salt content is 5%~10%.
Waste water stoste is pre-processed, the pH of waste water stoste is adjusted to 7 using dilute sulfuric acid, it is then secondary wet with the last time
The high-temp liquid that formula catalytic oxidation generates carries out heat exchange, then enters in catalytic wet oxidation reactor and is reacted, is urged
Change 150 DEG C of wet oxidation reactor interior reaction temperature, partial pressure of oxygen 2MPa, air speed 1h-1, the reaction time is 2 hours, catalyst choosing
With the mixture of copper oxide and manganese oxide.
The waste water stoste that next group will be reacted after reaction carries out heat exchange, gas-liquid separation is then carried out, by gas
The isolated liquid of liquid is passed through MVR evaporator and is evaporated crystallization, and the temperature in MVR evaporator is 70 DEG C, the compressor
Operating temperature be 75 DEG C, internal pressure 100Kpa.
Then the liquid after evaporative crystallization is handled using SBR.
To waste water stoste untreated in the present embodiment treatment process, by catalytic wet oxidation treated liquid with
And the liquid after evaporative crystallization is detected, shown in testing result table 1.
The Testing index of 1 embodiment of table, 1 waste water
| Testing index | B/C value | COD |
| Raw water | 0.18 | 72000 |
| Oxidation water outlet | 0.41 | 13320 |
| Evaporation water outlet | 0.67 | 1195 |
Embodiment 2-8
The Aspartame that the processing method and embodiment 1 of the Aspartame production waste water that embodiment 2-8 is provided provide produces
The processing method of waste water is almost the same, and difference is that concrete operations condition is different.
Embodiment 2
The pH of waste water stoste is adjusted to 6 using dilute sulfuric acid, Aspartame COD value of waste water is 72000mg/L, and salt content is
5%~10%, 200 DEG C, partial pressure of oxygen 2MPa, air speed 1h of catalytic wet oxidation reactor interior reaction temperature-1, the reaction time 1
Hour, catalyst selects the mixture of cerium oxide, iron oxide and zinc oxide；Temperature in MVR evaporator is 70 DEG C, the compression
The operating temperature of machine is 75 DEG C, internal pressure 100Kpa.The Testing index of 2 waste water of embodiment is as shown in table 2.
The Testing index of 2 embodiment of table, 2 waste water
| Testing index | B/C value | COD |
| Raw water | 0.18 | 72000 |
| Oxidation water outlet | 0.53 | 10224 |
| Evaporation water outlet | 0.72 | 951 |
Embodiment 3
The pH of waste water stoste is adjusted to 8 using dilute sulfuric acid, Aspartame COD value of waste water is 72000mg/L, and salt content is
5%~10%, 250 DEG C, partial pressure of oxygen 2MPa, air speed 1h of catalytic wet oxidation reactor interior reaction temperature-1, the reaction time is
1.5 hours, catalyst selected the mixture of cerium oxide, iron oxide and zinc oxide；Temperature in MVR evaporator is 70 DEG C, described
The operating temperature of compressor is 75 DEG C, internal pressure 100Kpa.The Testing index of 3 waste water of embodiment is as shown in table 3.
The Testing index of 3 embodiment of table, 3 waste water
| Testing index | B/C value | COD |
| Raw water | 0.18 | 72000 |
| Oxidation water outlet | 0.61 | 8640 |
| Evaporation water outlet | 0.78 | 878 |
Embodiment 4
The pH of waste water stoste is adjusted to 7 using sodium hydroxide, Aspartame COD value of waste water is 72000mg/L, and salt content is
5%~10%, 250 DEG C, partial pressure of oxygen 2MPa, air speed 1h of catalytic wet oxidation reactor interior reaction temperature-1, the reaction time 1
Hour, catalyst selects the mixture of manganese oxide, cerium oxide, iron oxide, zinc oxide and nickel oxide；Temperature in MVR evaporator
It is 85 DEG C, the operating temperature of the compressor is 80 DEG C, internal pressure 100Kpa.The Testing index of 4 waste water of embodiment such as table 4
It is shown.
The Testing index of 4 embodiment of table, 4 waste water
| Testing index | B/C value | COD |
| Raw water | 0.18 | 72000 |
| Oxidation water outlet | 0.61 | 8640 |
| Evaporation water outlet | 0.82 | 803 |
Embodiment 5
The pH of waste water stoste is adjusted to 7.5 using potassium hydroxide, Aspartame COD value of waste water is 72000mg/L, salt content
It is 5%~10%, 250 DEG C, partial pressure of oxygen 2MPa, air speed 1h of catalytic wet oxidation reactor interior reaction temperature-1, the reaction time is
2 hours, catalyst selected copper oxide；Temperature in MVR evaporator is 100 DEG C, and the operating temperature of the compressor is 90 DEG C, interior
Portion's pressure is 100Kpa.The Testing index of 5 waste water of embodiment is as shown in table 5.
The Testing index of 5 embodiment of table, 5 waste water
| Testing index | B/C value | COD |
| Raw water | 0.18 | 72000 |
| Oxidation water outlet | 0.61 | 8640 |
| Evaporation water outlet | 0.87 | 759 |
Embodiment 6
Aspartame COD value of waste water is 72000mg/L, and salt content is 5%~10%, anti-in catalytic wet oxidation reactor
200 DEG C of temperature are answered, partial pressure of oxygen 0.5MPa, air speed 1h-1, the reaction time is 2 hours, and catalyst selects cerium oxide and iron oxide
Mixture；Temperature in MVR evaporator is 50 DEG C, and the operating temperature of the compressor is 150 DEG C, internal pressure 50Kpa.
Embodiment 7
Aspartame COD value of waste water is 72000mg/L, and salt content is 5%~10%, anti-in catalytic wet oxidation reactor
180 DEG C of temperature are answered, partial pressure of oxygen 1MPa, air speed 1h-1, the reaction time is 1.2 hours, and catalyst selects nickel oxide；MVR evaporator
Interior temperature is 60 DEG C, and the operating temperature of the compressor is 130 DEG C, internal pressure 60Kpa.
Embodiment 8
Aspartame COD value of waste water is 72000mg/L, and salt content is 5%~10%, anti-in catalytic wet oxidation reactor
220 DEG C of temperature are answered, partial pressure of oxygen 1.5MPa, air speed 1h-1, the reaction time is 1.8 hours, and catalyst selects iron oxide, zinc oxide
With the mixture of nickel oxide；Temperature in MVR evaporator is 90 DEG C, and the operating temperature of the compressor is 100 DEG C, internal pressure
For 80Kpa.
Comparative example 1: the processing method processing of the Aspartame production waste water provided according to embodiment 1 is handled with embodiment 1
The identical Aspartame waste water of Aspartame production wastewater property, difference is after gas-liquid separation without evaporative crystallization, and
Directly carry out SBR processing.Shown in testing result table 6.
The Testing index of the waste water of 6 comparative example 1 of table
| Testing index | B/C value | COD |
| Raw water | 0.18 | 72000 |
| Oxidation water outlet | 0.41 | 13320 |
Comparative example 2: the processing method processing of the Aspartame production waste water provided according to embodiment 1 is handled with embodiment 1
The identical Aspartame waste water of Aspartame production wastewater property, difference is to pre-process and directly carry out after heat exchange
Gas-liquid separation and evaporative crystallization, and without catalytic wet oxidation.Shown in testing result table 7.
The effluent monitoring index of 7 comparative example 2 of table
| Testing index | B/C value | COD |
| Raw water | 0.18 | 72000 |
| Evaporation water outlet | 0.32 | 21608 |
In conclusion the processing method of Aspartame of the present invention production waste water is by catalytic wet oxidation technology and evaporative crystallization
Technology combines, and effective degradation of Aspartame Coal Gas Washing Cycling Water organic matter is realized using catalytic wet oxidation technology, is gone
It improves except rate reaches 80%~90% and B/C value to 0.4 or more；By MVR vapor-compression technology, it is able to achieve salinity in waste water
Effectively remove, and secondary recovery utilization can be carried out, and the biochemical treatment of evaporation condensed water further progress can qualified discharge；
The heat that oxidation reaction is discharged in wet oxidation reactor can not only maintain temperature required for organic matter autoxidation, and
And outlet high temperature fluid can also exchange heat with system feeding, preheat to feeding liquid, heat is fully used；This
Outside, by effective catalyst use and further improvement to reaction unit, reaction efficiency can be greatly improved, greatly reduced
Operating cost provides preferable basis for the following significantly industrial applications, has good market prospects.
The foregoing is merely the preferred embodiment of the present invention, are not intended to restrict the invention, for this field
For technical staff, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any
Modification, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of processing method of Aspartame production waste water, which comprises the following steps:
Pretreated waste water stoste is handled for the first time using Wet Catalytic Oxidation Method, then carries out gas-liquid separation, and to gas
The isolated liquid of liquid is evaporated crystallization using MVR evaporation technique.
2. the processing method of Aspartame production waste water according to claim 1, which is characterized in that carry out before handling for the first time
The high-temp liquid that pretreated waste water stoste and last Wet Catalytic Oxidation Method generate carries out heat exchange.
3. the processing method of Aspartame production waste water according to claim 2, which is characterized in that first processing is to urge
Under the action of agent, the waste water stoste after heat exchange is reacted with oxygen mix.
4. the processing method of Aspartame production waste water according to claim 3, which is characterized in that when being reacted, oxygen
The partial pressure of gas is 0.5-2MPa, and reaction temperature is 150-250 DEG C, and the reaction time is 1-2 hours.
5. the processing method of Aspartame production waste water according to claim 3, which is characterized in that the catalyst is gold
Belong to oxide carried type catalyst.
6. the processing method of Aspartame production waste water according to claim 5, which is characterized in that the metal oxide
Loaded catalyst include in copper oxide, manganese oxide, cerium oxide, iron oxide, zinc oxide or nickel oxide any one or at least
Two kinds.
7. producing the processing method of waste water according to Aspartame described in claim 4-6 any one, which is characterized in that carry out
When evaporative crystallization, MVR evaporator internal temperature is 50~100 DEG C, and internal pressure is 50~100Kpa, and compressor operating temperature is
70~150 DEG C.
8. the processing method of Aspartame production waste water according to claim 1, which is characterized in that pretreatment is by waste water
The pH value of stoste is adjusted to 6-8.
9. the processing method of Aspartame production waste water according to claim 1, which is characterized in that the liquid after evaporative crystallization
Body enters biochemical unit and carries out biochemical treatment.
10. the processing method of Aspartame production waste water according to claim 9, which is characterized in that biochemical treatment can adopt
With UASB, A/O, A2Any one in/O, SBR or contact oxidation method is handled.
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