CN110498573A - A kind of method suede nitre dye wastewater treatment and recycled - Google Patents
A kind of method suede nitre dye wastewater treatment and recycled Download PDFInfo
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- C02F1/24—Treatment of water, waste water, or sewage by flotation
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- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/22—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof
- C02F2103/24—Nature of the water, waste water, sewage or sludge to be treated from the processing of animals, e.g. poultry, fish, or parts thereof from tanneries
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Abstract
The present invention relates to a kind of method suede nitre dye wastewater treatment and recycled, the present invention contaminates cycling and reutilization after the waste water that each process generates is handled to suede nitre.The invention has the benefit that wastewater treatment method of the invention solves under conditions of low pH, remove the problem of emulsified fat；Under the premise of not changing the pH of pending water, through method of the invention, treated that water is as clear as crystal, can reuse, achieve the purpose that technique waste water not outlet；Reduce discharge of wastewater, can totally reduce the use of 30% chemical industry former material, decrease the discharge of chloride ion.
Description
Technical field
The present invention relates to a kind of wastewater treatment and the methods recycled, and in particular to a kind of suede nitre dye wastewater treatment and
The method recycled.
Background technique
Tanning is that property change occurs to intradermal penetration and in conjunction with rawhide tropocollagen molecule active group for tanning agent molecule
Process.Tanning makes to generate cross-bond between collagen polypeptide chain, increases the stability of collagen structure, improve shrinkage temperature and
Hydrothermal stability improves the ability of the chemicals such as antiacid, alkali, enzyme.
Rawhide must be through a series of preparatory process such as immersion, depilation, liming, softening, pickling, above-mentioned work before the tanning of process hides
Sequence makes rawhide mainly be left the web that is made of collagen, but be not also leather is rawhide.Tanning carries out generally in rotary drum, tannage
It is different and different with finished leather kind according to used tanning agent.There are many water-bath links in tanning processes, wherein pickling link pH value exists
2.5 left and right；Tanning link, between 3.5-7.5；Link pH value is neutralized 5.0 or so；Existing way is row or again
New water is changed using 3-5 heel row again, it is dynamic containing more emulsification in the waste water that operation is not only wasted water, but also exhausted in this way
Object grease and impurity, chloride ion content is also higher, risen in 40000mg/ or so.
Summary of the invention
In order to solve the shortcomings of the prior art, the present invention provides a kind of suede nitre dye wastewater treatment and recycle
Method.Suede nitre dye wastewater treatment of the invention and the method recycled solve suede nitre dye waste water and cannot reuse
The problem of；Reduce a large amount of discharges of chloride ion, saves water source and production cost.
The object of the present invention is to provide a kind of methods suede nitre dye wastewater treatment and recycled.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, the method are
The method of cycling and reutilization after the waste water that each process generates is handled is contaminated suede nitre, and the suede nitre contaminates each process packet
Include immersion in suede tannery, multiple leaching, degreasing, pickling, tanning, neutralization step and retanning, dyeing, rinsing in suede dyeing and finishing
Process；It the described method comprises the following steps:
(1) waste water generated in process is soaked by soaking process and again and is respectively adopted after the first processing method is handled divides
Other reuse；The first described processing method successively includes air bearing, acidification hydrolization, aerobic biochemical process；
(2) waste water generated in degreasing process is used for soaking process or soaks process again；
(3) after being collected respectively to the waste water generated in pickling procedure, tanning processes, retanning procedures and neutralization step,
Second method is respectively adopted to be handled, reuse or further reuse after decoloration after making waste water reach clarification, during reuse
No longer adding or add salt content of a small amount of salt into water is 40-60g/ liter；The second method successively includes that absorption is de-
The processing of color, flocculation sedimentation, removal impurity and suspended matter and part emulsified fat；
(4) waste water that retanning procedures generate, does handle once or twice every year, separates supernatant direct reuse, and precipitating is mixed
It closes object and carries out filters pressing processing, filtered solution can reuse；
(5) in dyeing process, the more dark colour that the waste water for being used to contaminate light colour is used to contaminate same colour system is dyed into water；To
Dyeing water for contaminated it is most dark after, reuse contaminates light colour after the first processing method processing described in step (1)；
(6) waste water generated in rinsing process is returned after being handled using the first processing method described in step (1)
With.
The process water of reuse only adds acid, the tanning agent of opposite in-process without adding salt or adding a small amount of salt
Deng.
It is mixed after being collected to the waste water generated in pickling procedure, tanning processes and neutralization step, using second of side
Method is handled, the correspondence process being back to use respectively in pickling procedure, tanning processes and neutralization step after making waste water reach clarification
.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, wherein step
(1), in step (5) and step (6), the first described processing method the following steps are included:
(I) air-flotation process: waste water is handled by air floatation machine；
(II) acidification hydrolization: being added anaerobic bacteria into the waste water after step (I) air-flotation process, mixed, by water not
Soluble organism is hydrolyzed to dissolved organic matter, converts the macromolecular substances of difficult for biological degradation to the small molecule of easily biological-degradable
Substance；
(III) aerobic biochemical process: being added aerobic bacteria into the waste water after step (II) acidification hydrolization, mixed, and carries out
Biological metabolism is with degradation of organic substances, then reuse.After multiple reuse, process water will become micro- Huang of beer color, if not muddy, only need
Decolorization is passed through using physical decolorization method again, that is, can reach clarification.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, further,
In step (I), first decolorizing treatment agent is active carbon, and the active carbon is by banyan root phosphoric acid dip, drying；Then
It is obtained after being carbonized.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, further,
In step (II), first flocculant is polymerized by acrylamide monomer.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, wherein step
(3) and in step (5), second of processing method, comprising the following steps:
(a) adsorption bleaching: the waste water generated in pickling procedure, tanning processes and neutralization step is collected respectively, is added
Enter the second decolorizing treatment agent and carries out adsorption bleaching processing；
(b) flocculation sedimentation will be added the second flocculant in adsorption bleaching that step (a) obtains treated waste water and help solidifying
Agent makes to generate flocculation sedimentation in waste water；Supernatant and mixed precipitation liquid are separated, mixed precipitation liquid is filtered, filtered solution returns
With；
(c) it removes the processing of impurity and suspended matter and part emulsified fat: step (b) being obtained using physical method upper
Clear liquid removes impurity and suspended matter and part emulsified fat.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, further,
In step (a), second decolorizing treatment agent is mixed by ethylene oxide, triethanolamine, Powdered Activated Carbon.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, further,
In step (b), the additive amount of second flocculant is waste water weight 0.05 ‰, and the additive amount of the flocculation aid is waste water weight
7‰。
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, further,
In step (b), second flocculant is made of the mixture of polyacrylamide or aluminium polychloride and decolorization flocculation agent；It is described
Flocculation aid includes quick lime.
Polyacrylamide abbreviation PAC is a kind of water-soluble inorganic high molecular polymer, there is stronger bridge formation absorption property,
In hydrolytic process, with the physical process that cohesion, absorption and precipitating occurs.
Aluminium polychloride abbreviation PAM, is linear polymeric polymer, soluble easily in water, does not dissolve in most of organic solvents, tool
There is good flocculability, the frictional resistance between liquid can be reduced.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, further,
In step (b), it is filtered using full-automatic plate and frame type filter-press.
The method that the suede nitre of specific embodiment according to the present invention contaminates wastewater treatment and recycles, further,
In step (c), the supernatant removes impurity and suspended matter and part emulsified fat by ultrafiltration membrane.Make after ultrafiltration membrance filter
Suspended matter drops to 69mg/L or less.
The characteristics of waste water generated during fur tanning is that the animal fat and impurity content of emulsification are high, chloride ion
Content is in 40000mg/ liter or so.General demulsifier requires the pH of pending water that can just have effect 7.5 or more.
The invention has the benefit that
(1) wastewater treatment method of the invention solves under conditions of low pH, removes the problem of emulsified fat；Do not changing
Under the premise of the pH for becoming pending water, through method of the invention, treated that water is as clear as crystal, can reuse, reach technique
The purpose of waste water not outlet.
(2) present invention carries out the waste water after a certain process use to be used for other processes or circulation benefit after handling or not handling
With realizing recycling for water in suede process under the premise of not influencing fur processing quality.
(3) wastewater treatment method of the invention reduces discharge of wastewater, can totally reduce the use of 30% chemical industry former material,
Also slow down and lacked the discharge of chloride ion.
Specific embodiment
Technical solutions and effects of the present invention is described in further details combined with specific embodiments below.
As illustrated without especially unexpected, each raw material used in the present invention is all industry universal raw material.
Embodiment 1
A kind of method suede nitre dye wastewater treatment and recycled is present embodiments provided, the method is to suede nitre
The method of cycling and reutilization after the waste water that each process generates is handled is contaminated, it includes suede tan that the suede nitre, which contaminates each process,
Immersion, multiple leaching, degreasing, pickling, tanning, neutralization step and the retanning in suede dyeing and finishing, dyeing, rinsing process during system；Institute
State method the following steps are included:
(1) waste water generated in process is soaked by soaking process and again and is respectively adopted after the first processing method is handled divides
Other reuse；The first described processing method successively includes air bearing, acidification hydrolization, aerobic biochemical process；
(2) waste water generated in degreasing process is used for soaking process or soaks process again；
(3) after being collected respectively to the waste water generated in pickling procedure, tanning processes and neutralization step, it is respectively adopted
Two kinds of methods are handled, and reuse or further reuse after decoloration, no longer add salt after so that waste water is reached clarification during reuse；
The second method successively includes the processing of adsorption bleaching, flocculation sedimentation, removal impurity and suspended matter and part emulsified fat；
(4) waste water that retanning procedures generate, does handle once or twice every year, separates supernatant direct reuse, and precipitating is mixed
It closes object and carries out filters pressing processing, filtered solution can reuse；
(5) in dyeing process, the more dark colour that the waste water for being used to contaminate light colour is used to contaminate same colour system is dyed into water；To
Dyeing water for contaminated it is most dark after, reuse contaminates light colour after the first processing method processing described in step (1)；
(6) waste water generated in rinsing process is returned after being handled using the first processing method described in step (1)
With.
The process water of reuse only adds acid, the tanning agent etc. of opposite in-process without adding salt.
It is mixed after being collected to the waste water generated in pickling procedure, tanning processes and neutralization step, using second of side
Method is handled, any process being back to use in pickling procedure, tanning processes and neutralization step after making waste water reach clarification.
Embodiment 2
A kind of method suede nitre dye wastewater treatment and recycled is present embodiments provided, the method is to suede nitre
The method of cycling and reutilization after the waste water that each process generates is handled is contaminated, it includes suede tan that the suede nitre, which contaminates each process,
Immersion, multiple leaching, degreasing, pickling, tanning, neutralization step and the retanning in suede dyeing and finishing, dyeing, rinsing process during system；Institute
State method the following steps are included:
(1) waste water generated in process is soaked by soaking process and again and is respectively adopted after the first processing method is handled divides
Other reuse；The first described processing method successively includes air bearing, acidification hydrolization, aerobic biochemical process；
(2) waste water generated in degreasing process is used for soaking process or soaks process again；
(3) after being collected respectively to the waste water generated in pickling procedure, tanning processes, retanning procedures and neutralization step,
Second method is respectively adopted to be handled, reuse or further reuse after decoloration after making waste water reach clarification, during reuse
Adding salt content of a small amount of salt into water is 60g/ liter；The second method successively includes adsorption bleaching, flocculation sedimentation, goes
Except the processing of impurity and suspended matter and part emulsified fat；
(4) waste water that retanning procedures generate, does handle once or twice every year, separates supernatant direct reuse, and precipitating is mixed
It closes object and carries out filters pressing processing, filtered solution can reuse；
(5) in dyeing process, the more dark colour that the waste water for being used to contaminate light colour is used to contaminate same colour system is dyed into water；To
Dyeing water for contaminated it is most dark after, reuse contaminates light colour after the first processing method processing described in step (1)；
(6) waste water generated in rinsing process is returned after being handled using the first processing method described in step (1)
With.
The process water of reuse only adds acid, the tanning agent etc. of opposite in-process without adding salt.
It is mixed after being collected to the waste water generated in pickling procedure, tanning processes and neutralization step, using second of side
Method is handled, any process being back to use in pickling procedure, tanning processes and neutralization step after making waste water reach clarification.
Wherein, in step (1), step (5) and step (6), the first described processing method the following steps are included:
(I) air-flotation process: waste water is handled by air floatation machine；
(II) acidification hydrolization: being added anaerobic bacteria into the waste water after step (I) air-flotation process, mixed, by water not
Soluble organism is hydrolyzed to dissolved organic matter, converts the macromolecular substances of difficult for biological degradation to the small molecule of easily biological-degradable
Substance；
(III) aerobic biochemical process: being added aerobic bacteria into the waste water after step (II) acidification hydrolization, mixed, and carries out
Biological metabolism is with degradation of organic substances, then reuse.After multiple reuse, process water will become beer yellow, if not muddy, only need again
Decolorization is passed through using physical decolorization method, that is, can reach clarification.
Wherein, in step (3), second of processing method, comprising the following steps:
(a) adsorption bleaching: being collected the waste water generated in pickling procedure, tanning processes and neutralization step respectively, point
The second decolorizing treatment agent is not added and carries out adsorption bleaching processing；
(b) flocculation sedimentation will be added the second flocculant in adsorption bleaching that step (a) obtains treated waste water and help solidifying
Agent makes to generate flocculation sedimentation in waste water；Supernatant and mixed precipitation liquid are separated, mixed precipitation liquid is filtered, filtered solution returns
With；
(c) it removes the processing of impurity and suspended matter and part emulsified fat: step (b) being obtained using physical method upper
Clear liquid removes impurity and suspended matter and part emulsified fat.
Embodiment 3
A kind of method suede nitre dye wastewater treatment and recycled is present embodiments provided, the method is to suede nitre
The method of cycling and reutilization after the waste water that each process generates is handled is contaminated, it includes suede tan that the suede nitre, which contaminates each process,
Immersion, multiple leaching, degreasing, pickling, tanning, neutralization step and the retanning in suede dyeing and finishing, dyeing, rinsing process during system；Institute
State method the following steps are included:
(1) waste water generated in process is soaked by soaking process and again and is respectively adopted after the first processing method is handled divides
Other reuse；The first described processing method successively includes air bearing, acidification hydrolization, aerobic biochemical process；
(2) waste water generated in degreasing process is used for soaking process or soaks process again；
(3) after being collected respectively to the waste water generated in pickling procedure, tanning processes and neutralization step, it is respectively adopted
Two kinds of methods are handled, and reuse or further reuse after decoloration, are added a small amount of during reuse after so that waste water is reached clarification
Salt content of the salt into water is 40g/ liter；The second method successively includes adsorption bleaching, flocculation sedimentation, removal impurity and hangs
The processing of floating object and part emulsified fat；
(4) waste water that retanning procedures generate, does handle once or twice every year, separates supernatant direct reuse, and precipitating is mixed
It closes object and carries out filters pressing processing, filtered solution can reuse；
(5) in dyeing process, the more dark colour that the waste water for being used to contaminate light colour is used to contaminate same colour system is dyed into water；To
Dyeing water for contaminated it is most dark after, reuse contaminates light colour after the first processing method processing described in step (1)；
(6) waste water generated in rinsing process is returned after being handled using the first processing method described in step (1)
With.
The process water of reuse only adds acid, the tanning agent etc. of opposite in-process without adding salt.
It is mixed after being collected to the waste water generated in pickling procedure, tanning processes and neutralization step, using second of side
Method is handled, any process being back to use in pickling procedure, tanning processes and neutralization step after making waste water reach clarification.
Wherein, in step (1), step (5) and step (6), the first described processing method the following steps are included:
(I) air-flotation process: waste water is handled by air floatation machine；
(II) acidification hydrolization: being added anaerobic bacteria into the waste water after step (I) air-flotation process, mixed, by water not
Soluble organism is hydrolyzed to dissolved organic matter, converts the macromolecular substances of difficult for biological degradation to the small molecule of easily biological-degradable
Substance；
(III) aerobic biochemical process: being added aerobic bacteria into the waste water after step (II) acidification hydrolization, mixed, and carries out
Biological metabolism is with degradation of organic substances, then reuse.When, after multiple reuse, process water will become beer Huang, if not muddy, only need again
It is secondary that decolorization is passed through using physical decolorization method, that is, it can reach clarification.
Wherein, in step (3), second of processing method, comprising the following steps:
(a) adsorption bleaching: the waste water generated in pickling procedure, tanning processes, retanning procedures and neutralization step is received
Collection is added the second decolorizing treatment agent and carries out adsorption bleaching processing；Second decolorizing treatment agent by ethylene oxide, triethanolamine,
Powdered Activated Carbon mixes；
(b) flocculation sedimentation will be added the second flocculant in adsorption bleaching that step (a) obtains treated waste water and help solidifying
Agent makes to generate flocculation sedimentation in waste water；Supernatant and mixed precipitation liquid are separated, was carried out using full-automatic plate and frame type filter-press
Filter, filtered solution reuse；The additive amount of second flocculant is waste water weight 0.05 ‰, and the additive amount of the flocculation aid is waste water
Weight 7 ‰；Second flocculant is made of the mixture of polyacrylamide and decolorization flocculation agent；The flocculation aid includes raw stone
Ash；
(c) processing of impurity and suspended matter and part emulsified fat: the supernatant obtained by ultrafiltration membrane to step (b) is removed
Liquid removes impurity and suspended matter and part emulsified fat, so that suspended matter is dropped to 69mg/L or less after ultrafiltration membrance filter.
The above description is merely a specific embodiment, but scope of protection of the present invention is not limited thereto, any
Those familiar with the art in the technical scope disclosed by the present invention, can easily think of the change or the replacement, and should all contain
Lid is within protection scope of the present invention.Therefore, protection scope of the present invention should be based on the protection scope of the described claims.
Claims (10)
1. method suede nitre dye wastewater treatment and recycled, which is characterized in that the method is to contaminate each work to suede nitre
The method of cycling and reutilization after the waste water that sequence generates is handled, it includes in suede tannery that the suede nitre, which contaminates each process,
Immersion, multiple leaching, degreasing, pickling, tanning, neutralization step and the retanning in suede dyeing and finishing, dyeing, rinsing process；The method packet
Include following steps:
(1) waste water generated in leaching process by soaking process and again is respectively adopted after the first processing method is handled returns respectively
With；The first described processing method successively includes air bearing, acidification hydrolization, aerobic biochemical process；
(2) waste water generated in degreasing process is used for soaking process or soaks process again；
(3) it after being collected respectively to the waste water generated in pickling procedure, tanning processes and neutralization step, is respectively adopted second
Method is handled, and reuse or further reuse after decoloration, no longer add or add during reuse after so that waste water is reached clarification
Salt content of a small amount of salt into water is 40-60g/ liter；The second method successively includes adsorption bleaching, flocculation sedimentation, goes
Except the processing of impurity and suspended matter and part emulsified fat；
(4) waste water that retanning procedures generate, does handle once or twice every year, separates supernatant direct reuse, precipitation mixture
Filters pressing processing is carried out, filtered solution can reuse；
(5) in dyeing process, the more dark colour that the waste water for being used to contaminate light colour is used to contaminate same colour system is dyed into water；It is to be dyed
Water for contaminated it is most dark after, reuse contaminates light colour after the first processing method processing described in step (1)；
(6) waste water generated in rinsing process, reuse after being handled using the first processing method described in step (1).
2. the method according to claim 1 suede nitre dye wastewater treatment and recycled, which is characterized in that step (1)
In, the first described processing method the following steps are included:
(I) air-flotation process: waste water is handled by air floatation machine；
(II) acidification hydrolization: being added anaerobic bacteria into the waste water after step (I) air-flotation process, mixed, will be insoluble in water
Hydrolysis of organic matter is dissolved organic matter, converts the macromolecular substances of difficult for biological degradation to the small molecule object of easily biological-degradable
Matter；
(III) aerobic biochemical process: being added aerobic bacteria into the waste water after step (II) acidification hydrolization, mixed, and carries out biology
Metabolism is with degradation of organic substances, then reuse.
3. the method according to claim 2 suede nitre dye wastewater treatment and recycled, which is characterized in that step (I)
In, first decolorizing treatment agent is active carbon, and the active carbon is by banyan root phosphoric acid dip, drying；Then charcoal is carried out
It is obtained after change.
4. the method according to claim 2 suede nitre dye wastewater treatment and recycled, which is characterized in that step (II)
In, first flocculant is polymerized by acrylamide monomer.
5. the method according to claim 1 suede nitre dye wastewater treatment and recycled, which is characterized in that step (3)
In, second of processing method, comprising the following steps:
(a) adsorption bleaching: being collected the waste water generated in pickling procedure, tanning processes and neutralization step respectively, is added the
Two decolorizing treatment agents carry out adsorption bleaching processing；
(b) the second flocculant and flocculation aid will be added in adsorption bleaching that step (a) obtains treated waste water in flocculation sedimentation,
Make to generate flocculation sedimentation in waste water；Supernatant and mixed precipitation liquid are separated, mixed precipitation liquid is filtered, filtered solution reuse；
(c) processing of impurity and suspended matter and part emulsified fat: the supernatant obtained using physical method to step (b) is removed
Remove impurity and suspended matter and part emulsified fat.
6. the method according to claim 5 suede nitre dye wastewater treatment and recycled, which is characterized in that step (a)
In, second decolorizing treatment agent is mixed by ethylene oxide, triethanolamine, Powdered Activated Carbon.
7. the method according to claim 5 suede nitre dye wastewater treatment and recycled, which is characterized in that step (b)
In, the additive amount of second flocculant is waste water weight 0.05 ‰, and the additive amount of the flocculation aid is waste water weight 7 ‰.
8. the method according to claim 5 suede nitre dye wastewater treatment and recycled, which is characterized in that step (b)
In, second flocculant is made of the mixture of polyacrylamide or aluminium polychloride and decolorization flocculation agent；The flocculation aid
Including quick lime.
9. the method for suede nitre dye cycling utilization of wastewater according to claim 5, which is characterized in that in step (b), use
Full-automatic plate and frame type filter-press is filtered.
10. the method for suede nitre dye cycling utilization of wastewater according to claim 5, which is characterized in that in step (c), institute
It states supernatant and impurity and suspended matter and part emulsified fat is removed by ultrafiltration membrane.
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