CN109626636A - A kind of extracting protein from waster water of starch and purification process - Google Patents
A kind of extracting protein from waster water of starch and purification process Download PDFInfo
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- CN109626636A CN109626636A CN201811581524.9A CN201811581524A CN109626636A CN 109626636 A CN109626636 A CN 109626636A CN 201811581524 A CN201811581524 A CN 201811581524A CN 109626636 A CN109626636 A CN 109626636A
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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
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K1/00—General methods for the preparation of peptides, i.e. processes for the organic chemical preparation of peptides or proteins of any length
- C07K1/14—Extraction; Separation; Purification
- C07K1/30—Extraction; Separation; Purification by precipitation
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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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- 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
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Abstract
The present invention relates to technical field of waste water purification, and in particular to a kind of extracting protein from waster water of starch and purification process comprising following steps: (1) adding acid solution into waste water and heat up, the pH value in waste water is made to reach the isoelectric point of protein；(2) protein denaturation being warming up in waste water is carried out to waste water；(3) flocculant is added into waste water, the protein being finally separating out in waste water obtains the waste water after protein proposes；(4) waste water after protein proposes is passed through in Fenton's reaction device and is reacted, obtain reaction solution；(5) reaction solution is subjected to primary filtration, waste water and nanofiltration concentrated water after obtaining primary filtration by water purifier；(6) waste water after primary filtration is subjected to smart filtering by RO reverse osmosis water purifying plant, obtains purified waste water and RO reverse osmosis concentrated water, the protein in starch wastewater can be proposed, the COD value of waste water can be made to be down to 200mg/L or less from 35000mg/L.
Description
Technical field
The present invention relates to technical field of waste water processing, and in particular to a kind of extracting protein from waster water of starch and purification process.
Background technique
Waste water and extraction of the waste water generated in potato starch production mainly from the cleaning potato generation of cleaning workshop section
The waste water that workshop section generates, the sewage of potato starch enterprise discharge at present are mainly the waste water for extracting workshop section and generating, and extract workshop section
The waste water of generation includes cell liquid and technique waste water, and cell liquid is the waste water that starch milk extracts that workshop section generates, mainly potato
The water content of itself, technique waste water are the waste water that starch isolation generates, and the main ingredient of cell liquid and technique waste water is protein,
Tiny starch, small fiber and various glucides, these substances also have the secondary state being dissolved in water with the presence of time suspended state
In the presence of COD (COD) concentration in waste water reaches 35000mg/L, and aqueous concentration cannot reach discharge standard, to this portion
It needs first to carry out purified treatment to waste water before dividing waste water to be discharged.
Summary of the invention
In order to overcome shortcoming and defect existing in the prior art, the purpose of the present invention is to provide a kind of starch wastewaters to mention
Albumen and purification process are taken, the protein in starch wastewater can be proposed, it is good to the purified treatment effect of waste water, it can make to give up
The COD value of water is down to 200mg/L or less from 35000mg/L.
The purpose of the invention is achieved by the following technical solution: a kind of extracting protein from waster water of starch and purification process, special
Sign is: including the following steps:
(1) acid solution is added into waste water and is heated up, and the pH value in waste water is made to reach the isoelectric point of protein；
(2) protein denaturation being warming up in waste water is carried out to waste water；
(3) flocculant is added into waste water, the protein being finally separating out in waste water obtains the waste water after protein proposes；
(4) waste water after protein proposes is passed through in Fenton's reaction device and is reacted, obtain reaction solution；
(5) reaction solution is subjected to primary filtration, waste water and nanofiltration concentrated water after obtaining primary filtration by water purifier；
(6) waste water after primary filtration is subjected to smart filtering by RO reverse osmosis water purifying plant, obtains purified waste water and RO is anti-
Permeate concentrated water.
Further, the pH value of the waste water in the step (1) after addition acid solution is less than or equal to 5, and is warming up to 50-60
℃。
Further, waste water is warming up to 70-100 DEG C in the step (2).
Further, the flocculant in the step (3) is PAC flocculant and PAM flocculant, and first addition PAC flocculates
Agent, then add PAM flocculant.
Further, the parts by weight of the PAC flocculant addition are the 2 ‰ -5 ‰ of waste water, the PAM flocculant addition
Parts by weight be waste water 0.5 ‰ -2 ‰.
Further, which is carried out using following system, including the first wastewater collection dress being sequentially communicated by pipeline
It sets, protein proposes device, Fenton's reaction device, the second waste water collection device, water purifier, RO reverse osmosis water purification units
With reuse water collecting device, first waste water collection device is used to store and precipitate the waste water of workshop discharge, the egg
White matter proposes the protein in the waste water that device is used to isolate after the first waste water collection device precipitating, the Fenton's reaction dress
It sets for the organic matter in the waste water crossed through protein proposition device purified treatment of degrading, second waste water collection device is used for
It stores and precipitates through the processed waste water of Fenton's reaction device, the water purifier is used for through the second waste water collection device
Waste water after precipitating carries out primary filtration, and the RO reverse osmosis water purification units are used for after water purifier purified treatment
Waste water carries out smart filtering, and the reuse water collecting device is for storing the waste water after RO reverse osmosis water purification units purified treatment.
Further, the protein proposes that device includes the isoelectric point adjusting tower for passing sequentially through pipeline connection, protein
It is denaturalized tower, the first flocculation tower, the second flocculation tower, Gravity Separation tower and Protein Recovery tower, the isoelectric point adjusting tower and first
Waste water collection device connection, the top of the isoelectric point adjusting tower are equipped with first for acid solution to be added dropwise into isoelectric point adjusting tower
Dosing tank and primary heater for being heated to the waste water in isoelectric point adjusting tower are equipped in the protein denaturation tower
Ultraviolet radiation device for being sterilized to the waste water in protein denaturation tower and for the waste water in protein denaturation tower
The top of the secondary heater heated, first flocculation tower is equipped with for adding PAC flocculant into the first flocculation tower
The second dosing tank, the third that the top of second flocculation tower is equipped with for adding PAM flocculant into the second flocculation tower adds
Medicine-chest, is connected with conveyer between the Protein Recovery tower and Gravity Separation tower, the Protein Recovery tower passes through conveyer
By in the protein delivery in Gravity Separation tower to Protein Recovery tower, the conveyer connects the top of Gravity Separation tower, institute
State the bottom of the second waste water collection device connection Gravity Separation tower.
Further, third wastewater collection dress is connected between the water purifier and RO reverse osmosis water purification units
It sets, the third waste water collection device is for storing and precipitating through the filtered waste water of water purifier.
Further, the water purifier is equipped with the first sewage draining exit for the nanofiltration concentrated water containing waste residue to be discharged,
The RO reverse osmosis unit is equipped with the second sewage draining exit for the reverse osmosis concentrated water containing waste residue to be discharged, first wastewater collection
Device is connected to by pipeline with the first sewage draining exit and the second sewage draining exit.
The beneficial effects of the present invention are:
1, when handling waste water using system of the invention, waste water first passes through pipeline and enters in the first waste water collection device, first
A period of time is stood in waste water collection device, and the useless biggish particulate matter of water part density is made to be precipitated to the first wastewater collection dress
The bottom set, and then the concentration of the particulate matter in waste water is reduced, and the waste water row after being precipitated by the first waste water collection device
Enter protein to propose in device, protein proposes that the protein in waste water is separated from the water by device and extracts, and makes in waste water
COD value be down to 6000mg/L or so from 35000mg/L, reach the preliminary purification purpose to waste water.Waste water is mentioned by protein
After device proposes protein out, then by waste water by Fenton's reaction device, made using Fenton process difficult to degrade organic in waste water
Object reacts and resolves into small molecule inorganic matter, achievees the purpose that further to purify waste water, the COD value drop of waste water at this time
To 3000mg/L, then waste water is passed through in the second waste water collection device and is precipitated, it is larger further to remove density in waste water
Particulate matter, avoid the large particulate matter in waste water from being passed through in water purifier and damage water purifier, influence waste water
The normal work of cleaning treatment system, the supernatant in waste water after precipitating are filtered by water purifier, are removed useless
Inorganic salts, small fiber and various glucides in water, filtered waste water pass through RO reverse osmosis water purification units again and proceed through
Filter further removes the impurity in water purifier waste water, then filtered water is passed through in reuse water collecting device, passes through
The COD value of water purifier and RO reverse osmosis water purification units treated waste water is less than 200mg/L, reaches discharge standard, can
The recycling huge profit that resource is discharged or carried out to it is used；
2, extracting protein from waster water of starch of the invention and purification process are high to the purification efficiency of waste water, can be to the egg in starch wastewater
White matter carries out proposition good purification, and the COD value of waste water can be made to be down to 200mg/L from 35000mg/L, reaches discharge or recycling benefit
Standard, and controllability is good.
Detailed description of the invention
Fig. 1 is the schematic diagram of the extracting protein from waster water of starch of the embodiment of the present invention and the system of purification process.
Description of symbols: 1, the first waste water collection device；2, protein proposes device；21, isoelectric point adjusting tower；211,
First dosing tank；212, primary heater；213, the first valve；22, protein denaturation tower；221, ultraviolet radiation device；222,
Secondary heater；23, the first flocculation tower；231, the second dosing tank；232, the second valve；24, the second flocculation tower；241, third adds
Medicine-chest；242, third valve；25, Gravity Separation tower；26, Protein Recovery tower；27, conveyer；3, Fenton's reaction device；4,
Two waste water collection devices；5, water purifier；6, RO reverse osmosis water purification units；7, reuse water collecting device；8, third waste water
Collection device.
Specific embodiment
For the ease of the understanding of those skilled in the art, make below with reference to 1 couple of present invention of examples and drawings further
Illustrate, the content that embodiment refers to not is limitation of the invention.
Embodiment 1
A kind of extracting protein from waster water of starch and purification process comprising following steps:
(1) pH value for adding acid solution to waste water into waste water is 5, while being allowed to warm to 60 DEG C to waste water heating, is made in waste water
PH value reach the isoelectric point of protein；
(2) waste water is heated and is warming up to 70 DEG C, make the protein denaturation in waste water；
(3) PAC flocculant is first added into waste water, and PAM flocculant, the egg being finally separating out in waste water are then added into waste water
White matter obtains the waste water after protein proposes；Wherein the parts by weight of PAC flocculant addition are 2 ‰, the PAM flocculant of waste water
The parts by weight of addition are the 1 ‰ of waste water.
(4) waste water after protein proposes is passed through in Fenton's reaction device 3 and is reacted, obtain reaction solution；
(5) reaction solution is subjected to primary filtration by water purifier 5, the waste water and nanofiltration after obtaining primary filtration are dense
Water；
(6) waste water after primary filtration is subjected to smart filtering by RO reverse osmosis water purifying plant, obtains purified waste water and RO is anti-
Permeate concentrated water.
Above-mentioned extracting protein from waster water of starch and purification process are carried out by following system comprising are sequentially communicated by pipeline
The first waste water collection device 1, protein propose device 2, Fenton's reaction device 3, the second waste water collection device 4, nanofiltration water purification
Device 5, RO reverse osmosis water purification units 6 and reuse water collecting device 7, first waste water collection device 1 is for storing and precipitating
The waste water of workshop discharge, it is useless after the first waste water collection device 1 precipitating that the protein proposes that device 2 is used to isolate
Protein in water, the Fenton's reaction device 3 is for having in the waste water crossed through protein proposition 2 purified treatment of device of degrading
Machine object, second waste water collection device 4 is for storing and precipitating through the processed waste water of Fenton's reaction device 3, the nanofiltration
Purifier 5 is used to carry out the waste water after the second waste water collection device 4 precipitating primary filtration, the RO reverse osmosis purified water dress
6 are set for carrying out smart filtering to the waste water after 5 purified treatment of water purifier, the reuse water collecting device 7 is for storing up
Deposit the waste water after 6 purified treatment of RO reverse osmosis water purification units.
When handling waste water using system of the invention, waste water first passes through pipeline into the first waste water collection device 1, the
A period of time is stood in one waste water collection device 1, and the useless biggish particulate matter of water part density is made to be precipitated to the first waste water receipts
The bottom of acquisition means 1, and then the concentration of the particulate matter in waste water is reduced, and after being precipitated by the first waste water collection device 1
Waste water is discharged into protein and proposes in device 2, and protein proposes that the protein in waste water is separated from the water by device 2 and extracts,
So that the COD value in waste water is down to 6000mg/L or so from 35000mg/L, reaches the preliminary purification purpose to waste water.Waste water passes through
After protein proposes that device 2 proposes protein, then by waste water by the way that in Fenton's reaction device 3, it is difficult in waste water to be made using Fenton process
The organic matter of degradation reacts and resolves into small molecule inorganic matter, achievees the purpose that further to purify waste water, at this time useless
The COD value of water is down to 3000mg/L, and then waste water is passed through in the second waste water collection device 4 and is precipitated, and further removes useless
The biggish particulate matter of density in water avoids the large particulate matter in waste water from being passed through damage nanofiltration water purification in water purifier 5
Device 5 influences the normal work of waste water purifying treatment system, and the supernatant in waste water after precipitating passes through water purifier 5
It is filtered, removes inorganic salts, small fiber and the various glucides in waste water, it is reverse osmosis net that filtered waste water passes through RO again
Water installations 6 proceed through filter, further remove the impurity in 5 waste water of water purifier, then filtered water is passed through reuse
In water collecting device 7, it is less than by the COD value of water purifier 5 and RO reverse osmosis water purification units 6 treated waste water
200mg/L reaches discharge standard, and the recycling huge profit that resource can be discharged or carried out to it is used.
Further, the protein proposes that device 2 includes the isoelectric point adjusting tower 21 for passing sequentially through pipeline connection, albumen
Qualitative change tower 22, the first flocculation tower 23, the second flocculation tower 24, Gravity Separation tower 25 and Protein Recovery tower 26, the isoelectric point
Adjusting tower 21 is connected to the first waste water collection device 1, and the top of the isoelectric point adjusting tower 21 is equipped with for adjusting to isoelectric point
The first dosing tank 211 of acid solution and the first heating for being heated to the waste water in isoelectric point adjusting tower 21 are added dropwise in tower 21
Device 212, the interior ultraviolet light being equipped with for being sterilized to the waste water in protein denaturation tower 22 of the protein denaturation tower 22 shine
Emitter 221 and secondary heater 222 for being heated to the waste water in protein denaturation tower 22, first flocculation tower 23
Top be equipped with for into the first flocculation tower 23 add PAC flocculant the second dosing tank 231, second flocculation tower 24
Top is equipped with the third dosing tank 241 for adding PAM flocculant into the second flocculation tower 24,26 He of Protein Recovery tower
Conveyer 27 is connected between Gravity Separation tower 25, the Protein Recovery tower 26 will be in Gravity Separation tower 25 by conveyer 27
Protein delivery to Protein Recovery tower 26 in, the conveyer 27 connects the top of Gravity Separation tower 25, and described second is useless
The bottom of the connection Gravity Separation tower 25 of water collecting device 4.
From the isoelectric point adjusting tower 21 that the first waste water collection device 1 drains into that albumen proposes device, isoelectric point is adjusted waste water
First dosing tank 211 at 21 top of tower adds acid solution into isoelectric point adjusting tower 21, makes the waste water in isoelectric point adjusting tower 21
PH value is 5, while being heated by primary heater 212 to the waste water in isoelectric point adjusting tower 21, and the temperature of waste water is reached
To 60 DEG C, pH value reaches the isoelectric point of protein in waste water, so that the protein in waste water is carried out initial flocculation, then arranges waste water
Enter in protein denaturation tower 22, and the temperature of waste water is heated to 70 DEG C by secondary heating mechanism to make protein denaturation, makes molten
Protein in Xie Yushui is precipitated with biggish molecular forms, while the ultraviolet light that logical ultraviolet radiation device 221 is launched is to useless
Water carries out sterilization processing, and then by treated, waste water is successively discharged into the first flocculation tower 23 and the second flocculation tower 24, herein mistake
Cheng Zhong, second dosing tank 231 at 23 top of the first flocculation tower, which adds PAC flocculant into the first flocculation tower 23, makes the egg in waste water
White matter is assembled, waste water addition PAM flocculation of second dosing tank 231 at 24 top of the second flocculation tower into the second flocculation tower 24
Agent makes macro-molecular protein in waste water and solid particle form the biggish protein solid content of volume and as a mixture
It into Gravity Separation tower 25, is separated in Gravity Separation tower 25, forms protein solid content and water in waste water and divide
Layer, upper layer is swum in since the specific gravity of protein solid content is smaller, clear water is discharged into lower layer and from the bottom of Gravity Separation tower 25
In second waste water collection device 4, and the protein solid content on upper layer by conveyer 27 be delivered in Protein Recovery tower 26 into
Row recycling, and utilized after being processed as needed to the protein solid content of recycling, the waste of resource can be reduced.
Specifically, the junction of the first dosing tank 211 and isoelectric point adjusting tower 21 is equipped with the first valve 213, can control the
One dosing tank 211 adds into isoelectric point adjusting tower 21 or stops adding acid solution, the second dosing tank 231 and the first flocculation tower 23
Junction is equipped with the second valve 232, and addition PAC is added or stopped into the first flocculation tower 23 for controlling the second dosing tank 231
The junction of flocculant, third dosing tank 241 and the second flocculation tower 24 is equipped with third valve 242, for controlling third dosing tank
241 add into the second flocculation tower 24 or stop addition PAM flocculant.
Further, third wastewater collection dress is connected between the water purifier 5 and RO reverse osmosis water purification units 6
8 are set, the third waste water collection device 8 is for storing and precipitating through the filtered waste water of water purifier 5.Waste water is by receiving
Filter purifier 5 carries out staticly settling a period of time in third waste water collection device 8 after being filtered, and is further reduced and is passed through RO
Impurity in reverse osmosis water purification units 6 improves purification of waste water effect.
Further, the water purifier 5 is equipped with the first sewage draining exit for the nanofiltration concentrated water containing waste residue to be discharged
(not indicating in figure), the RO reverse osmosis unit are equipped with the second sewage draining exit (figure for the reverse osmosis concentrated water containing waste residue to be discharged
In do not indicate), first waste water collection device 1 is connected to by pipeline with the first sewage draining exit and the second sewage draining exit.
First waste water collection device 1 is connected to the first sewage draining exit and the second sewage draining exit, makes 5 He of water purifier
The nanofiltration concentrated water containing waste residue and reverse osmosis concentrated water that RO reverse osmosis water purification units 6 filter out are passed through the first waste water collection device 1
In, further purified treatment is carried out, waste water resource is avoided, improves the recovery utilization rate of water resource.
Specifically, in order to improve purified treatment efficiency, the present embodiment sets that there are two water purifiers 5, and two nanofiltrations
Purifier 5 is arranged in parallel, and the efficiency of filtering not only can be improved, and when a failure of water purifier 5 needs to tie up
When repairing, purification of waste water work can be carried out by one water purifier 5 of isolated operation, guarantee decontamination process it is normal into
Row.
Embodiment 2
Embodiment 2 difference from example 1 is that, the extracting protein from waster water of starch and purification process method of embodiment 2 include
Following steps:
(1) pH value for adding acid solution to waste water into waste water is 4, while being allowed to warm to 50 DEG C to waste water heating, is made in waste water
PH value reach the isoelectric point of protein；
(2) waste water is heated and is warming up to 100 DEG C, make the protein denaturation in waste water；
(3) PAC flocculant is first added into waste water, and PAM flocculant, the egg being finally separating out in waste water are then added into waste water
White matter obtains the waste water after protein proposes；Wherein the parts by weight of PAC flocculant addition are 5 ‰, the PAM flocculant of waste water
The parts by weight of addition are the 2 ‰ of waste water.
(4) waste water after protein proposes is passed through in Fenton's reaction device 3 and is reacted, obtain reaction solution；
(5) reaction solution is subjected to primary filtration by water purifier 5, the waste water and nanofiltration after obtaining primary filtration are dense
Water；
(6) waste water after primary filtration is subjected to smart filtering by RO reverse osmosis water purifying plant, obtains purified waste water and RO is anti-
Permeate concentrated water.
System used by the extracting protein from waster water of starch and purification process of embodiment 2 is same as Example 1.
Embodiment 3
Embodiment 3 difference from example 1 is that, the extracting protein from waster water of starch and purification process of embodiment 3 include such as
Lower step:
(1) pH value for adding acid solution to waste water into waste water is 3, while being allowed to warm to 55 DEG C to waste water heating, is made in waste water
PH value reach the isoelectric point of protein；
(2) waste water is heated and is warming up to 85 DEG C, make the protein denaturation in waste water；
(3) PAC flocculant is first added into waste water, and PAM flocculant, the egg being finally separating out in waste water are then added into waste water
White matter obtains the waste water after protein proposes；Wherein the parts by weight of PAC flocculant addition are that 3.5 ‰, PAM of waste water flocculates
The parts by weight of agent addition are the 0.5 ‰ of waste water.
(4) waste water after protein proposes is passed through in Fenton's reaction device 3 and is reacted, obtain reaction solution；
(5) reaction solution is subjected to primary filtration by water purifier 5, the waste water and nanofiltration after obtaining primary filtration are dense
Water；
(6) waste water after primary filtration is subjected to smart filtering by RO reverse osmosis water purifying plant, obtains purified waste water and RO is anti-
Permeate concentrated water.
System used by the extracting protein from waster water of starch and purification process of embodiment 3 is same as Example 1.
Above-described embodiment is the preferable implementation of the present invention, and in addition to this, the present invention can be realized with other way,
Do not depart under the premise of present inventive concept it is any obviously replace it is within the scope of the present invention.
Claims (9)
1. a kind of extracting protein from waster water of starch and purification process, characterized by the following steps:
(1) acid solution is added into waste water and is heated up, and the pH value in waste water is made to reach the isoelectric point of protein；
(2) protein denaturation being warming up in waste water is carried out to waste water；
(3) flocculant is added into waste water, the protein being finally separating out in waste water obtains the waste water after protein proposes；
(4) waste water after protein proposes is passed through in Fenton's reaction device and is reacted, obtain reaction solution；
(5) reaction solution is subjected to primary filtration, waste water and nanofiltration concentrated water after obtaining primary filtration by water purifier；
(6) waste water after primary filtration is subjected to smart filtering by RO reverse osmosis water purifying plant, obtains purified waste water and RO is anti-
Permeate concentrated water.
2. a kind of extracting protein from waster water of starch according to claim 1 and purification process, it is characterised in that: the step
(1) pH value of the waste water in after addition acid solution is less than or equal to 5, and is warming up to 50-60 DEG C.
3. a kind of extracting protein from waster water of starch according to claim 1 and purification process, it is characterised in that: the step
(2) waste water is warming up to 70-100 DEG C in.
4. a kind of extracting protein from waster water of starch according to claim 1 and purification process, it is characterised in that: the step
(3) flocculant in is PAC flocculant and PAM flocculant, and first adds PAC flocculant, then add PAM flocculant.
5. a kind of extracting protein from waster water of starch according to claim 4 and purification process, it is characterised in that: the PAC wadding
The parts by weight of solidifying agent addition are the 2 ‰ -5 ‰ of waste water, and the parts by weight of the PAM flocculant addition are the 0.5 ‰-of waste water
2‰。
6. a kind of extracting protein from waster water of starch according to claim 1 and purification process, it is characterised in that: the technique uses
Following system carries out, and the first waste water collection device, protein including being sequentially communicated by pipeline propose device, Fenton's reaction dress
It sets, the second waste water collection device, water purifier, RO reverse osmosis water purification units and reuse water collecting device, described first is useless
Water collecting device is used to store and precipitate the waste water of workshop discharge, and the protein proposes device for isolating through first
The protein in waste water after waste water collection device precipitating, the Fenton's reaction device propose that device is net through protein for degrading
Change the organic matter in processed waste water, second waste water collection device is handled for storing and precipitating through Fenton's reaction device
The waste water crossed, the water purifier are used to carry out primary filtration, institute to the waste water after the second waste water collection device precipitating
RO reverse osmosis water purification units are stated for carrying out smart filtering to the waste water after water purifier purified treatment, the recycle-water is received
Acquisition means are for storing the waste water after RO reverse osmosis water purification units purified treatment.
7. a kind of extracting protein from waster water of starch according to claim 6 and purification process, it is characterised in that: the protein
It is proposed that device includes the isoelectric point adjusting tower for passing sequentially through pipeline connection, protein denaturation tower, the first flocculation tower, the second flocculation
Tower, Gravity Separation tower and Protein Recovery tower, the isoelectric point adjusting tower are connected to the first waste water collection device, the isoelectric point
The top of adjusting tower is equipped with the first dosing tank for acid solution to be added dropwise into isoelectric point adjusting tower and is used for isoelectric point adjusting tower
The primary heater that interior waste water is heated, the protein denaturation tower is interior to be equipped with for the waste water in protein denaturation tower
The ultraviolet radiation device sterilized and the secondary heater for being heated to the waste water in protein denaturation tower, described
The top of one flocculation tower is equipped with the second dosing tank for adding PAC flocculant into the first flocculation tower, second flocculation tower
Top be equipped with the third dosing tank for adding PAM flocculant into the second flocculation tower, the Protein Recovery tower and gravity
Be connected with conveyer between knockout tower, the Protein Recovery tower by conveyer by the protein delivery in Gravity Separation tower extremely
In Protein Recovery tower, the top of the conveyer connection Gravity Separation tower, the second waste water collection device connection gravity point
Bottom from tower.
8. a kind of extracting protein from waster water of starch according to claim 6 and purification process, it is characterised in that: the nanofiltration is net
Third waste water collection device is connected between water installations and RO reverse osmosis water purification units, the third waste water collection device is for storing up
It deposits and precipitates through the filtered waste water of water purifier.
9. a kind of extracting protein from waster water of starch according to claim 6 and purification process, it is characterised in that: the nanofiltration is net
Water installations are equipped with the first sewage draining exit for the nanofiltration concentrated water containing waste residue to be discharged, and the RO reverse osmosis unit is equipped with for being discharged
Second sewage draining exit of the reverse osmosis concentrated water containing waste residue, first waste water collection device pass through pipeline and the first sewage draining exit and the
The connection of two sewage draining exits.
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