CN109665678A - A kind of fatty acid production wastewater treatment process - Google Patents
A kind of fatty acid production wastewater treatment process Download PDFInfo
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- CN109665678A CN109665678A CN201910135758.9A CN201910135758A CN109665678A CN 109665678 A CN109665678 A CN 109665678A CN 201910135758 A CN201910135758 A CN 201910135758A CN 109665678 A CN109665678 A CN 109665678A
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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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
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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
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
- C02F1/385—Treatment of water, waste water, or sewage by centrifugal separation by centrifuging suspensions
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
- C02F1/5245—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents using basic salts, e.g. of aluminium and iron
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular 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
- 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
- C02F1/722—Oxidation by peroxides
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/32—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
- C02F2103/322—Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters from vegetable oil production, e.g. olive oil production
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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
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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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- Separation Of Suspended Particles By Flocculating Agents (AREA)
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Abstract
The present invention relates to a kind for the treatment of process of waste water generated suitable for fatty acid production process, the first oil phase and the first water phase are obtained by flotation oil removing including pretreated fatty acid producing waste water will be passed through, first oil mutually using be centrifugally separating to obtain second oil mutually and the second water phase, first water phase and the second water phase are handled as the first composite waste, utilize demulsification, coagulant precipitation, the processing steps such as biochemistry, to influent CODCr> 45000mg/L, TP > 3500mg/L reach the provincial standard of DB21/1627-2008 " Liaoning Province's integrated wastewater discharge standard " after the organic wastewater with high concentration that pH is 5 or so is handled.The method of the present invention can purify waste water containing edible oil, and purifying rate is high, CODCrRemoval rate, can effective dephosphorization up to 99% or more.Fatty acid production wastewater treatment process of the invention can also be applied to other waste water containing edible oil, such as: remaining meal waste water, oil expression waste water, food wastewater.
Description
Technical field
The present invention relates to field of waste water treatment containing edible oil, refer specifically to using soybean oil residue and soap stock as one kind of raw material
Fatty acid production wastewater treatment process.
Background technique
Containing vegetable oil wastewater, as oil/soap stock can be generated in soybean oil production process.Rouge is produced by raw material of oil/soap stock
Fat acid technique is widely used in chemical industry in recent years, this is one important channel of China's oil/soap stock effective use.But
The waste water generated during producing fatty acid contains a large amount of greases, since this wastewater pH is extremely low and contains large amount of organic and phosphorus,
The COD value that will lead to water body increases rapidly, if the direct emission external world would seriously pollute the environment.Therefore, to fatty acid producing waste water
Advanced treatment process carry out research have particularly significant meaning.
Except containing in addition to high-concentration grease in fatty acid producing waste water, also containing the organic matters such as phosphatide, oil foot, soap stock with,
CODCrIt is higher.Because oil wastewater is mostly intermittent discharge, complicated component, pH value is unstable, and water quality and quantity amplitude of variation is very big, to place
Reason facility easily causes great destruction.Oil wastewater total release is big, and organic concentration is high, and very big waste is caused to water resource
And pollution environment.And existing processing technique mainly produces water reuse MVR technique to fatty acid, then by biochemical method
Reason.The processing cost is high for this method, equipment operation is complicated, MVR process benefit fouling difficulty clears up and generates a large amount of concentrates and is difficult
Processing.
Summary of the invention
In order to solve the above-mentioned technical problems, the present invention provides a kind of fatty acid production wastewater treatment process, solve or
Person alleviates the difficulty of current fatty acid production wastewater treatment to a certain extent, and existing complex treatment process, at high cost, operation is multiple
The disadvantages of miscellaneous, poor controllability, is unable to ensure water outlet CODCrLess than 50mg/L, solves the problems, such as that water outlet is not up to standard, reduce processing
Cost reaches higher effluent quality, meets the requirement of green production energy-saving and emission-reduction.
In the past studies have shown that containing a large amount of organic acids and inorganic acid in fatty acid producing waste water, it is added in deacidification
Milk of lime, the calcium soap formed with organic acid is not soluble in water, reacts life with the host inorganic sour (sulfuric acid) in acidification oil production process
At calcium sulfate be slightly soluble in water, achieve the purpose that reduce acidity and sediment fraction organic matter.Therefore, this research is by being added lime
Cream adjusts sewage, it is therefore an objective to control waste water acidity so as to subsequent processing, utilize Demulsification and coagulant precipitating pretreating process to combine fragrant
, the systems such as biochemistry handle fatty acid producing waste water.
This application provides a kind of fatty acid production wastewater treatment process, fatty acid producing waste water includes: with soybean oil
Oil/soap stock is the sugar water generated in the sour water that generates in acidization of raw material and acidification oil hydrolytic process, oil-containing when feature
Height is acid strong.Specific processing step the following steps are included:
(1) waste water is passed through conditioning tank with certain rate first, opens air-floating apparatus, obtaining upper layer is the first oily phase, lower layer
For the first water phase.
(2) the first oil in step 1 is mutually centrifuged, obtains the second oil phase and the second water phase, to the second oily phase
Recycling and reusing is carried out, by the second water phase and the first water phase mixed processing, referred to as the first composite waste, the application is directed generally to
Treatment process research to the first composite waste that the above process is separated；
(3) by step 2 first composite waste adjust pH to 7-9, adjust pH select CaO, be added milk of lime after can with it is organic
Acid reaction forms calcium soap salt not soluble in water, and the calcium sulfate generated is reacted with inorganic acid (sulfuric acid) and is slightly soluble in water, reaches reduction acid
The purpose of degree and sediment fraction organic matter and total phosphorus, while can be with dephosphorization；
(4) it is demulsified to the waste water after the adjusting pH described in step 3, demulsification does not need additional construction conditioning tank, mixed
Demulsification, coagulation, flocculation, sedimentation are completed at the same time in solidifying settling tank；
(5) supernatant in step 4 is subjected to Fenton's reaction, continues coagulant precipitation after Fenton's reaction；
(6) by Fenton in step 5, treated that water outlet adjusts with factory's sanitary sewage to biochemical range and carries out biochemical treatment,
Sanitary sewage and fatty acid production waste are handled simultaneously；
Beneficial effect
The beneficial effects of the invention are as follows the wastewater treatments that can solve fatty acid production industry, especially processing with soybean oil/
Soap stock is in terms of raw material produces fatty acid wastewater, to be done using flotation-centrifugation-demulsification-coagulation/precipitating-Fenton-biochemistry-
Fatty acid producing waste water is separated into oil, water, solid waste by dry method.The technique is first with physical method by waste water
In suspended oil and dispersed oil separate, greatly reduce subsequent processing pressure, also recycle reusable money in waste water
Source.Subsequent demulsification can make Fenton oxidation be more easier to carry out, and improve biodegradability, and process is simple, operability
Effectively reduce processing cost and energy consumption well.
Detailed description of the invention
Fig. 1 is that the invention patent handles fatty acid production wastewater treatment flow chart.
Specific embodiment
In order to further illustrate the present invention, the present invention is described in detail with reference to the accompanying drawings and embodiments, but not
They can be interpreted as limiting the scope of the present invention.
The present invention provides a kind of fatty acid production wastewater treatment process, solves or alleviate to a certain extent at present
The difficulty of fatty acid production wastewater treatment, at present the existing complex treatment process of fat acid producing waste water, it is at high cost, complicated for operation,
The disadvantages of poor controllability, is unable to ensure water outlet CODCrThe technical issues of less than 50mg/L, solves standard water discharge emission problem, drop
Low processing cost, effluent quality is higher, meets the requirement of green production energy-saving and emission-reduction.
Referring to attached drawing 1, this application provides a kind of fatty acid production wastewater treatment process, fatty acid producing waste water is mainly wrapped
It includes: acidification oil production waste water (sour water), waste water hydrolyzed by acidated oil (sugar water) and sanitary sewage etc.；The waste water treatment process mainly wraps
Include following steps:
S1: sour water and sugar water carry out oil removal, flotation processing, isolate the neutral oil for not being dissolved and emulsifying, contain in sour water big
Measure H3PO4, a large amount of glycerol are contained in sugar water.Upper layer product after flotation is known as the first oily phase, and lower layer's product is known as the first water phase,
First oil is mutually centrifuged to obtain the second oil phase and the second water phase, the second oil mutually can be with recycling and reusing, by the first water
The first composite waste being mutually mixed to form with the second water phase；
Air bearing is carried out to fatty acid producing waste water (oily waste water) and obtains the first oil mutually with the first water phase, obtains first in air bearing
The control of water phase oil content, hereinafter, since the first oil mutually can also contain some aqueous phase, is mutually centrifuged the first oil in 40ppm
Then separating treatment carries out liquid separation, obtain the second oil mutually and the second water phase, obtain that the second water phase oil content is lower to be can be controlled in
100ppm or less.
S2: being mixed to get the first composite waste for the first water phase and the second water phase, and the first composite waste CODCr >
45000mg/L, water outlet oil content control is in 50ppm or less.
S3: to the first composite waste tune pH to 7-9, selecting industry CaO to adjust, and supernatant is separated after sedimentation and demulsification is added
Agent, MQ801, MQ802, MQ803, MQ805 that demulsifier selects certain company to provide have carried out screening to 4 kinds of demulsifiers and have obtained
MQ803 treatment effect is preferable, and dosage is 0.5% -1.0%.Due to mainly contained in waste water suspended oil, dispersed oil, oil emulsion,
Dissolved oil, gas floatation process can only remove suspended oil and dispersed oil, and Fenton process can remove dissolved oil, and oil emulsion is difficult to be removed,
Therefore it is handled here using demulsification.Coagulant precipitation is carried out to the water outlet after demulsification, coagulant precipitation selects PAC/PAM medicament, sedimentation
After be discharged CODCrRemoval rate can reach 30% -50%.
S4: it after fluffy solid object sedimentation completely in S3, separates supernatant and carries out Fenton processing.Since the first mixing is useless
Water CODCrIt is higher, therefore hydrogen peroxide and the control of ferrous ratio are advisable in 1:1-1:1.5 when Fenton, are discharged after Fenton's reaction
Good biodegradability.
S5: entering biochemistry pool for the water outlet of S4, this process can be mixed together processing with sanitary sewage, can play dilution
Effect can provide required nutrient again for biochemistry, utilize conventional A2O technique can make water outlet reach regional discharge standard, accomplish
Energy-saving and emission-reduction.
S6: generating sludge in step S1, S3, S4, S5, carries out unified desiccation and burning disposal.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (9)
1. a kind of fatty acid production wastewater treatment process, it is characterised in that: its treatment process includes oil removal, flotation, demulsification, sweet smell
Pause, coagulation, biochemical collaboration processing.
2. a kind of fatty acid production wastewater treatment process according to claim 1, it is characterised in that: its specifically comprises the processes of:
Step 1: by fatty acid producing waste water before discharging with regard to carrying out thus bypasses processing, it is divided into sour water and sugar water；
Step 2: respectively by the step 1 sour water and sugar water carry out oil removal, flotation handle, isolate be not dissolved and cream
The neutral oil of change, the upper layer product after flotation are known as the first oily phase, and lower layer's product is known as the first water phase；
Step 3: the first oil in the step 2 is mutually centrifugally separating to obtain the second oil mutually and the second water phase, the second oil phase can be with
First water phase in the step 2 and the second water phase are mixed introducing demulsification reaction tank and directly carried out at demulsification by recycling and reusing
Reason；
Step 4: water outlet in the step 3 is adjusted into pH to 7-9；
Step 5: demulsifier is added in the water outlet after adjusting pH in the step 4 and carries out demulsification reaction, then uses PAC/PAM
Solution coagulant precipitation；
Step 6: the coagulant precipitation water outlet in the step 5 is subjected to Fenton process oxidation processes；
Step 7: Fenton processing water outlet in the step 6 is subjected to biochemical treatment.
3. a kind of fatty acid production wastewater treatment process according to claim 2, it is characterised in that: the treatment process
For removing water pollutant, including COD, TP, NH3One of-N or a variety of.
4. a kind of fatty acid production wastewater treatment process according to claim 2, it is characterised in that: containing a large amount of in sour water
H3PO4；Contain a large amount of glycerol in sugar water.
5. a kind of fatty acid production wastewater treatment process according to claim 2, which is characterized in that the step 2 utilizes
Air bearing floatation carries out air-flotation process to oily waste water, obtains the first water phase, and the control of the first water phase oil content is obtained in air bearing
In 40ppm or less.
6. a kind of fatty acid production wastewater treatment process according to claim 2, which is characterized in that the step 3 obtains
The control of second water phase oil content is controlled in 100ppm, the first composite waste oil content in 50ppm.
7. a kind of fatty acid production wastewater treatment process according to claim 2, which is characterized in that the step 4 utilizes
CaO adjusts pH, can synchronize except TP.
8. a kind of fatty acid production wastewater treatment process according to claim 2, which is characterized in that used in the demulsification stage
MQ801, MQ802, MQ803, MQ805 that certain company provides.
9. a kind of fatty acid production wastewater treatment process according to claim 2 and 8, it is characterised in that: in the demulsification stage
The MQ803 provided using certain company, dosage are 0.5% -1%.
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| CN201910135758.9A CN109665678A (en) | 2019-02-25 | 2019-02-25 | A kind of fatty acid production wastewater treatment process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021098034A1 (en) * | 2019-11-22 | 2021-05-27 | 浙江海利环保科技股份有限公司 | Salt floating equipment and method for removing lifting grip or handle of waste edible oil bottle (can) |
| CN113860567A (en) * | 2021-11-01 | 2021-12-31 | 纳爱斯丽水日化有限公司 | Method for treating wastewater containing fatty acid salt |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62247000A (en) * | 1986-04-21 | 1987-10-28 | ミヨシ油脂株式会社 | Treatment of soap waste liquid |
| CN101665410A (en) * | 2009-09-22 | 2010-03-10 | 如皋市双马化工有限公司 | Sweet water fatty acid separation process |
| CN102887604A (en) * | 2012-10-29 | 2013-01-23 | 杭州油脂化工有限公司 | Method for hydrolyzing sweet water through processing grease by using dissolved air flotation |
| CN203451332U (en) * | 2013-08-12 | 2014-02-26 | 如皋市双马化工有限公司 | Fatty acid waste water treatment system |
| CN107572685A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | A kind of processing unit and method of high-concentration waste emulsion |
-
2019
- 2019-02-25 CN CN201910135758.9A patent/CN109665678A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62247000A (en) * | 1986-04-21 | 1987-10-28 | ミヨシ油脂株式会社 | Treatment of soap waste liquid |
| CN101665410A (en) * | 2009-09-22 | 2010-03-10 | 如皋市双马化工有限公司 | Sweet water fatty acid separation process |
| CN102887604A (en) * | 2012-10-29 | 2013-01-23 | 杭州油脂化工有限公司 | Method for hydrolyzing sweet water through processing grease by using dissolved air flotation |
| CN203451332U (en) * | 2013-08-12 | 2014-02-26 | 如皋市双马化工有限公司 | Fatty acid waste water treatment system |
| CN107572685A (en) * | 2017-08-31 | 2018-01-12 | 新奥环保技术有限公司 | A kind of processing unit and method of high-concentration waste emulsion |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021098034A1 (en) * | 2019-11-22 | 2021-05-27 | 浙江海利环保科技股份有限公司 | Salt floating equipment and method for removing lifting grip or handle of waste edible oil bottle (can) |
| CN113860567A (en) * | 2021-11-01 | 2021-12-31 | 纳爱斯丽水日化有限公司 | Method for treating wastewater containing fatty acid salt |
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Application publication date: 20190423 |