CN105016522B - Film treatment process for fatty acid wastewater - Google Patents
Film treatment process for fatty acid wastewater Download PDFInfo
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- CN105016522B CN105016522B CN201510385724.7A CN201510385724A CN105016522B CN 105016522 B CN105016522 B CN 105016522B CN 201510385724 A CN201510385724 A CN 201510385724A CN 105016522 B CN105016522 B CN 105016522B
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Abstract
The invention discloses a film treatment process for fatty acid wastewater. The invention aims to provide a novel recycling film treatment process for fatty acid wastewater. The process comprises the processes: oil-separating pre-treatment, film technical ultrafiltration, filter pressing, air-floating technology, evaporative treatment or biological treatment and the like. The wastewater treatment process disclosed by the invention adopts a process of a double film method combined with various treatment modes and adopts a process flow of gradually removal and extraction by many steps, so that harmless treatment of the wastewater or recycle of resources is finally realized. The wastewater treatment process disclosed by the invention solves a series of problems that the prior art is complex in process, the wastewater treatment effect is poor, great in difficulty and high in cost, the beneficial components in the wastewater cannot be recycled, the equipment is large in occupied area, the flocculant is liable to low temperature failure and the like.
Description
Technical field
The invention belongs to technical field of waste water processing, and in particular to a kind of fatty acid wastewater handling process, more particularly to one
Plant fatty acid wastewater membrane treatment process.
Background technology
Fatty acid wastewater is widely present, due to containing substantial amounts of aliphatic acid, glycerine, activating agent, grease etc. in such waste water,
There is good emulsibility and compatibility, the value that COD, BOD5 of water body are led on a small quantity is raised rapidly, due to the presence of oil
Exacerbate the difficulty of process.Acidification oil refer to the byproduct soap stock that oil refining plant is produced carry out acidification obtain
Oil.Acidification oil is substantially aliphatic acid, wherein containing the Multiple components such as pigment and unacidified triglycerides (neutral oil).
During with acidification oil production aliphatic acid, wastewater source is mainly the generation in hydrolysis phase process
, and the waste water produced in crude oil degassing, it is in 5-10% or so containing a small amount of aliphatic acid, glycerol content in waste water
Main component in waste water, using sulfuric acid as acidization, therefore containing the salinities such as substantial amounts of sulfate radical, these salt in waste water
Divide and difficulty is brought to follow-up biochemical treatment, in addition to rich in glycerine, also containing organic acid, inorganic acid, inorganic salts, mucilaginous substance
Impurity such as (colloids).
The organic wastewater of fatty acids is entered behind municipal sewage plant, the middle Long carbon chain aliphatic acid in waste water, oils thing
Matter is wrapped in the mass transfer that filler outer layer hinders oxygen, will cause aerobic microbiological metabolic disorder.If this kind of material is unprocessed straight
Tap into into rivers,lakes and seas water body, then endanger water ecosystem, severe contamination surrounding environment, the COD concentration of fatty acid wastewater reaches
100000mg/l or so is arrived, content is very high, unprocessed direct discharge or process the rich battalion that can all cause water body not up to standard
Fosterization, to water body is received serious pollution is brought.In addition, in sewage treatment plant the medium-chain fatty acid of oily and solid fraction length
The mixing grease of carbon chain fatty acid can block grid, and product slagging dirt, affects the normal operation of equipment in sludge pump.And aerobic
In processing unit and final sedimentation tank, the mixture of fatty acids can form " fat ball " and be in suspension together with the sludge of adhesion
State, discharges with water outlet.On the one hand sludge loss is caused, while also affecting effluent quality.
Because the raw material for using are different in aliphatic acid (production) wastewater treatment, major pollutants composition in waste water is caused
It is not quite similar, these differences determine the diversity on the treatment technology of these waste water and technologic particularity.Applied chemistry
Method, Coagulation Method, biochemical process, membrane biological process etc. process fatty acid wastewater and are difficult to obtain preferable effect.
The conventional processing technique that the existing country uses is mainly：Regulation, reaction, precipitation, coagulating sedimentation, sloping plate deposition, sludge
Concentration, press filtration filtration etc..
These conventional processing techniques are primarily present problems with：Water after process do not reach index into biochemical treatment,
The substantial amounts of useful component that biochemical treatment can not normally run, contain in waste water can not be recycled reasonably, be not carried out
Resource is recycled, and processing cost height, complex process, cumbersome and process time length, occupation area of equipment are big, chemical
Product consumption is big, and operational reliability is not good, and because current filter type cannot thoroughly remove oil, biological floe and glue
Body material and oil emulsion, effluent quality is poor.
The content of the invention
It is an object of the invention to overcome the deficiencies in the prior art, there is provided a kind of process is simple, easy to operate, treatment effect
Good, low cost, occupation area of equipment is little, and the beneficiating ingredient in waste water is capable of the fatty acid wastewater film process of resource recycling
Technique.
For achieving the above object, the technical solution adopted in the present invention is：A kind of fatty acid wastewater membrane treatment process,
It includes oil removal pretreatment, membrane technology ultrafiltration, press filtration, air flotation technology, evaporation process or biochemical treatment, and its concrete technology is：
Step one, fatty acid wastewater is squeezed into retaining regulating reservoir, regulating water quality, water temperature and the water yield；
Step 2, the fatty acid wastewater that Jing retaining regulating reservoirs were adjusted is introduced in device for ultrafiltration membrane 1 carries out filtration treatment；
Step 3, the waste water Jing after ultrafiltration membrance filter are divided into filtrate and condensed water two parts, and condensed water therein is followed
Aliphatic acid accumulator tank is entered after ring process；
Step 4, by described in above-mentioned steps filtrate introduce reaction tank 1, alkaline anti-reactant is added in reaction tank 1,
Adjust pH value and place static, carry out one-level depickling process；
It is pumped in filtering equipment after the completion of waste water reaction in step 5, reaction tank 1, by filtering equipment by filtrate
Separate with solid impurity；
Step 6, the filtrate Jing after press filtration is introduced into flocculation sedimentation tank, adds a certain proportion of flocculant, adjust pH value,
Carry out flocculation precipitation reaction；
The residue that waste water after step 7, precipitation is entered into after airfloat equipment removing flocculation reaction；
The waste water that step 8, Jing airfloat equipments were processed introduces reaction tank 2, and in reaction tank 2 alkaline reaction agent is also added,
Adjust pH value and place static, carry out two grades of depicklings and process；
Step 9, bis- grades of depicklings of Jing are processed reacted waste water it is introduced in device for ultrafiltration membrane 2 and carry out filtration treatment, ultrafiltration
Concentrate afterwards again returns to be circulated process in airfloat equipment；
Filtrate after step 10, above-mentioned steps ultrafiltration can directly carry out biochemical treatment, rear directly discharge up to standard；Or
Filtrate is squeezed in evaporimeter and is evaporated process, collect water and glycerine after evaporation.
The mode of natural cooling is taken in described step one reduces the temperature of waste water, then makes to give up to aeration in regulating reservoir
Water is sufficiently mixed uniformly with regulating water quality.
Ultrafiltration membrance filter uses the method for operation of efficient cross-flow filtration in described step two.
Milipore filter precision≤0.1 micron that described ultrafiltration membrance filter is used.
Alkaline reaction agent in described step four and step 8 is lime.
Described step four adjusts pH value to 12, reacts 2 hours.
Described step eight adjusts pH value to 11, reacts 1 hour.
The present invention has the advantages that relative to prior art：
1st, aliphatic acid can be reclaimed by one-level film process；
2nd, fatty acid wastewater can be entered directly in device for ultrafiltration membrane, using crossflow filtration technique, without the need for carrying out pre- place
Reason, the oil removal that need to only carry out water quality and quantity is processed；
3rd, in this technique using the harmful components removed step by step in waste water, using one-level depickling, two grades of depicklings, degumming work
Skill, it is to avoid the biochemical treatment that the presence of oil is produced in subsequent treatment is difficult, and this is not available for other prior arts；
4th, after this technological process process, the safe operation of biochemical treatment can be realized, or waste water can be realized
Resource is recycled, and realizes the zero-emission of waste water.
5th, present invention process flow process is short, and concise in technology, facility compact, floor space is little, and operation and maintenance are easy, processes effect
It is really good；
6th, using bi-membrane method process, after process can shortened process, reduce technology controlling and process node；
7th, in this technique compared with prior art, system energy consumption is low, and operating cost is low, and low cost, labor strength is low.
Description of the drawings
Fig. 1 is the sewage treatment technology process figure of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the present invention is described further, but the technical scope of the present invention is not limited thereto.
As shown in figure 1, a kind of fatty acid wastewater membrane treatment process of the present embodiment description, it comprises the steps：Step
First, fatty acid wastewater is squeezed into into retaining regulating reservoir, the suitable amount of control is placed and makes water temperature drop to room temperature, recovered liquid for a period of time
The oil of accumulation is floated on face, then waste water is sufficiently mixed uniformly using aeration.
Step 2, the fatty acid wastewater that Jing retaining regulating reservoirs were adjusted is introduced in device for ultrafiltration membrane 1 carries out one-level ultrafiltration
Process, this process mainly reclaims aliphatic acid, and removes the dissolving in waste water, emulsification and scattered oil, oarse-grained impurity
Deng.
Step 3, the waste water Jing after ultrafiltration membrance filter are divided into filtrate and condensed water two parts, and condensed water therein is followed
Ring process, after condensed water is concentrated to a certain extent, in entering aliphatic acid accumulator tank, after its aliphatic acid is separated out fat is reclaimed
Acid.
Step 4, by described in above-mentioned steps filtrate introduce reaction tank 1, alkaline anti-reactant is added in reaction tank 1
Lime, adjusting pH value and placing arrest reaction carries out for a period of time one-level depickling process.
It is pumped in filtering equipment after the completion of waste water reaction in step 5, reaction tank 1, by filtering equipment by waste water
In solid impurity be dehydrated and by waste residue drying and other treatment so as to filtrate and solid impurity be separated.
Step 6, by Jing after press filtration filtrate introduce flocculation sedimentation tank, now in waste water filtrate also contain very tiny glue
Body material, these colloidal substance particles are very tiny, and pole is difficult to be deposited, and the presence of colloidal substance can have a strong impact on
Color is turned over during dehydration by evaporation, causes equipment scaling etc., or even dehydration by evaporation can be made to carry out, it is therefore necessary to carry out degumming process,
Degumming process is carried out by the way of flocculation sediment, and a certain proportion of flocculant is added in waste water, adjusts pH value to 12, is reacted
2 hours, the tiny granular precipitate material in waste water is set to agglomerate to the bulky grain for forming big easy precipitation together.
The residue that waste water after step 7, precipitation is entered into after airfloat equipment removing flocculation reaction.
The waste water that step 8, Jing air-flotation process are crossed introduces reaction tank 2, adds alkaline reaction agent stone again in reaction tank 2
Ash, it is 11 to adjust pH value, is reacted 1 hour, carries out two grades of depicklings and processes.
Step 9, bis- grades of depicklings of Jing are processed reacted waste water it is introduced in device for ultrafiltration membrane 2 and carry out hyperfiltration treatment, ultrafiltration
Concentrate afterwards again returns to be circulated process in airfloat equipment, and the impurity in concentrate is further by airfloat equipment
Removing, reduces the concentration of useless impurities in water, reduces the pollution of film.
Filtrate after step 10, above-mentioned steps ultrafiltration can directly carry out biochemical treatment, rear directly discharge up to standard；Or
Filtrate is squeezed in evaporimeter and is evaporated process, collect water and glycerine after evaporation.
Milipore filter precision≤0.1 micron that ultrafiltration membrance filter described in above-mentioned steps four and step 8 is used, employing
It is the method for operation of efficient cross-flow filtration, this mode can farthest take away the pollutant on film surface, clean film surface,
Make the film device cycle of operation longer.
The key point of the waste water treatment process of the present invention is the technique combined using the various processing modes of bi-membrane method, and
The technological process of extraction is progressively removed using multi-step, the harmless treatment of waste water or the recycling of resource is finally realized.Its
In, milipore filter plays in the art very important effect, and one-level milipore filter first reclaims aliphatic acid, by the oil in waste water
Point, the impurity such as macromolecular substances, suspension effectively removes, it is to avoid the biochemical treatment that the presence of oil is produced in subsequent treatment
Difficulty, and substantial amounts of aliphatic acid, suspension etc. are eliminated, make the lime, the flocculant addition that add in follow-up process all
Significantly reduce, operating cost is also significantly reduced, while decreasing the amount of waste residue；Two-stage ultrafiltering mainly will be useless
The precipitation particulate matter such as tiny calcium sulfate, calcium phosphate formed in water is removed, while the colloid that will be produced in scouring processes
Also remove in the lump, this is that other filtration institutes are inaccessiable, it is ensured that subsequent biochemical process is evaporated smoothly entering for process
OK.The handling process that various processing modes combine, it is ensured that the effect of process, filtering equipment, airfloat equipment, evaporation equipment etc.
These conventional water treatment facilities combine, and the complexity of technological process is reduced to greatest extent.
In sum, the fatty acid wastewater handling process that the present invention is provided has advantages below：
1st, aliphatic acid can be reclaimed by one-level film process；
2nd, fatty acid wastewater can be entered directly in device for ultrafiltration membrane, pre- without the need for carrying out using crossflow membrane filtration technology
Process, the oil removal that need to only carry out water quality and quantity is processed；
3rd, in this technique using the harmful components removed step by step in waste water, using one-level depickling, two grades of depicklings, degumming work
Skill, it is to avoid the biochemical treatment that the presence of oil is produced in subsequent treatment is difficult, and this is not available for other prior arts；
4th, after this technological process process, the safe operation of biochemical treatment can be realized, or waste water can be realized
Resource is recycled, and realizes the zero-emission of waste water.
5th, present invention process flow process is short, and concise in technology, facility compact, floor space is little, and operation and maintenance are easy, processes effect
It is really good；
6th, using bi-membrane method process, after process can shortened process, reduce technology controlling and process node；
7th, in this technique compared with prior art, system energy consumption is low, and operating cost is low, and low cost, labor strength is low.
Claims (7)
1. a kind of fatty acid wastewater membrane treatment process, it is characterised in that：It includes oil removal pretreatment, membrane technology ultrafiltration, press filtration, gas
Floating technology, evaporation process or biochemical treatment, its concrete technology is：
Step one, fatty acid wastewater is squeezed into retaining regulating reservoir, regulating water quality, water temperature and the water yield；
Step 2, the fatty acid wastewater that Jing retaining regulating reservoirs were adjusted is introduced in device for ultrafiltration membrane 1 carries out filtration treatment；
Step 3, the waste water Jing after ultrafiltration membrance filter are divided into filtrate and condensed water two parts, and condensed water therein is circulated place
Aliphatic acid accumulator tank is entered after reason；
Step 4, by described in above-mentioned steps filtrate introduce reaction tank 1, alkaline anti-reactant is added in reaction tank 1, adjust
PH value simultaneously places static, carries out one-level depickling process；
It is pumped in filtering equipment after the completion of waste water reaction in step 5, reaction tank 1, by the way that filtering equipment is by filtrate and consolidates
Body impurity is separated；
Step 6, the filtrate Jing after press filtration is introduced into flocculation sedimentation tank, add a certain proportion of flocculant, adjust pH value, carried out
Flocculation precipitation reaction；
The residue that waste water after step 7, precipitation is entered into after airfloat equipment removing flocculation reaction；
The waste water that step 8, Jing air-flotation process are crossed introduces reaction tank 2, adds alkaline reaction agent again in reaction tank 2, adjusts pH
Value simultaneously places static, carries out two grades of depicklings and processes；
Step 9, bis- grades of depicklings of Jing are processed reacted waste water it is introduced in device for ultrafiltration membrane 2 and carry out filtration treatment, after ultrafiltration
Concentrate again returns to be circulated process in airfloat equipment；
Filtrate after step 10, above-mentioned steps ultrafiltration can directly carry out biochemical treatment, rear directly discharge up to standard；Or will filter
Liquid is squeezed in evaporimeter and is evaporated process, collects water and glycerine after evaporation.
2. a kind of fatty acid wastewater membrane treatment process as claimed in claim 1, it is characterised in that：Take in described step one
The mode of natural cooling reduces the temperature of waste water, then waste water is sufficiently mixed uniformly with regulating water quality to aeration in regulating reservoir.
3. a kind of fatty acid wastewater membrane treatment process as claimed in claim 1, it is characterised in that：Ultrafiltration in described step two
Membrane filtration uses the method for operation of efficient cross-flow filtration.
4. a kind of fatty acid wastewater membrane treatment process as described in claim 1 or 3, it is characterised in that：Described milipore filter mistake
Milipore filter precision≤0.1 micron that filter is used.
5. a kind of fatty acid wastewater membrane treatment process as claimed in claim 1, it is characterised in that：Described step four and step
Alkaline reaction agent in eight is lime.
6. a kind of fatty acid wastewater membrane treatment process as claimed in claim 1, it is characterised in that：Described step four adjusts pH
It is worth 12, reacts 2 hours.
7. a kind of fatty acid wastewater membrane treatment process as claimed in claim 1, it is characterised in that：Described step eight adjusts pH
It is worth 11, reacts 1 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510385724.7A CN105016522B (en) | 2015-07-06 | 2015-07-06 | Film treatment process for fatty acid wastewater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510385724.7A CN105016522B (en) | 2015-07-06 | 2015-07-06 | Film treatment process for fatty acid wastewater |
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| CN105016522A CN105016522A (en) | 2015-11-04 |
| CN105016522B true CN105016522B (en) | 2017-05-10 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108203209B (en) * | 2018-02-10 | 2020-08-04 | 铁岭金铎科技股份有限公司 | Method for treating acid-containing wastewater generated in production process of acidified oil |
| CN109179745A (en) * | 2018-08-29 | 2019-01-11 | 杭州轩辉环境设备有限公司 | A kind for the treatment of process for the waste water producing fatty acid generation |
| CN113480078A (en) * | 2021-08-13 | 2021-10-08 | 上海灿星环境科技有限公司 | Soapstock acidification wastewater treatment process |
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|---|---|---|---|---|
| US5429748A (en) * | 1993-04-23 | 1995-07-04 | White; Lloyd S. | Polymide membrane for separation of solvents from lube oil |
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| CN102876452A (en) * | 2012-09-21 | 2013-01-16 | 哈尔滨商业大学 | Soybean oil degumming method utilizing alkali refining waste water treated by inorganic ceramic membrane |
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