CN1806947A - Method and apparatus for processing leather wastes - Google Patents
Method and apparatus for processing leather wastes Download PDFInfo
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- CN1806947A CN1806947A CN 200610008061 CN200610008061A CN1806947A CN 1806947 A CN1806947 A CN 1806947A CN 200610008061 CN200610008061 CN 200610008061 CN 200610008061 A CN200610008061 A CN 200610008061A CN 1806947 A CN1806947 A CN 1806947A
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Abstract
The invention relates the method and unit of handing leather waste. The method comprises the following steps: 1 preprocessing the leather waste to form the granule; 2 putting the granule into enzyme bioreactor, adding alkaline enzyme water, depositing, effusing alkaline enzyme water, adding acid enzyme water, depositing, effusing acid enzyme water, adding clear water, and getting liquid product; 3 final treating the settling; 4 the liquid product treated by film separation to get the collagen. The unit comprises enzyme bioreactor, film separation device connected with enzyme bioreactor. Using the method and unit, the leather waste can be circularly utilized, and the collagen and other industrial raw materials can be made. The wastewater is zero discharge. The method and unit have the advantages of low cost and good treatment effect.
Description
Technical field
The present invention relates to the solid waste process field in environmental protection field, relate in particular to leather castoff reprocessing and be the method and the device thereof of multivariate resource high value added product.
Background technology
China is process hides big country, and it is global 1/4～1/5 that leather output accounts for, and China produces 1.7 hundred million skins per year according to a preliminary estimate, and 1,400,000 tons of generation of waste materials are arranged approximately.Domestic most leather-making enterprises mainly uses is the blue skin technology of sheet, thus produce contain chromium discarded object ratio height, output is big, produce more than 70 ten thousand tons (weight in wet base) approximately domestic according to estimates present every year and contain the chromium discarded object.Simultaneously make in the process of blue skin and the leftover pieces that produce in the chrome leather process also have a large amount of solid waste at fresh hide.If can not suitably handle, recycle, will cause secondary pollution to environment.
The leather castoff main component is a collagen, is bioabsorbable polymer material, is the rich in protein resource.The offal of making in the preceding operation of blue skin at fresh hide (accounting for 1/5～1/10) does not contain Cr
2O
3Etc. poisonous and harmful substance, the discarded object that produces in the processing of operation and blue skin after making blue skin then contains Cr
2O
3Etc. poisonous and harmful substance.Fully dissimilar leather castoffs put into different categories, rationally process, utilize new technology, new technology to be made into the attention that added value does not wait, application is different product more and more is subjected to domestic and international stakeholder, particularly be made into high-end collagen product and can be widely used in industries such as cosmetic, beauty treatment, medicine, health products.It promptly is an evidence of this respect that Japan, Taiwan had several years ago once started one collagen heat.
Utilizing biotechnology that leather castoff is processed into regenerated resources is domestic and international main means in this field.Wherein, the discarded object of conventional method processing fresh hide pre-treatment is the fresh hide leftover bits and pieces to be carried out high temperature boil the formation gelatin; It is to carry out alkali immersion, basic hydrolysis, filtration successively with containing the chromium leather castoff that conventional process contains the chromium leather castoff, extracts and obtains gelatin.This shows that traditional biochemical technology can only be made leather castoff edible or industrial gelatine, and can not be made into the collagen of high added value.
The molecular weight of collagen is approximately about 100,000, and it is by three α chains, just like the fried dough twist mode formation that is intertwined each other.Collagen destroys and will be out of shape through the heat treated higher order structure, article three, chain can be separated from each other and become gelatin, but in fact gelatin might be two α chains or three two times of generating from beginning to end or triploid in manufacture process, so the molecular weight of gelatin is the several times of collagen, have to millions of by several ten thousand, it is very wide to distribute, so gelatin is the collagen that agent structure is destroyed.
Summary of the invention
The method and the device of the processing leather wastes that technical problem to be solved by this invention is to provide a kind of effective processing leather castoff, produces the high additive value product, technology is easy.
For solving the problems of the technologies described above, the technical solution adopted in the present invention is: a kind of method of processing leather wastes, and it may further comprise the steps:
(1) leather castoff is carried out preliminary treatment and form the granule substrate;
(2) ezyme bio-reactor sequencing batch type in some cycles carries out: the alkaline enzyme water of the alkaline enzyme water of little material substrate charging-advance-precipitate-go out-advance acidicenzym water-precipitate-go out acidicenzym water-advance clear water-precipitate-go out liquid form product;
(3) step (2) precipitated solid material and residue are carried out post processing; And
(4) liquid form product of step (2) is carried out the film separating treatment and make the protide product.
The preliminary treatment of step (1) comprises washing, immersion, fragmentation, wherein washes, soaks at normal temperatures and finish, and the broken screw rod that adopts pushes automatic shredding machine.
The membrane separator operating temperature of step (2) ezyme bio-reactor and step (4) is lower than 70 ℃; Step (4) also comprises backwash technique, and the backwashing water temperature control is at 40～70 ℃.
The membrane separator operating temperature of step (2) ezyme bio-reactor and step (4) is lower than 40 ℃, and the backwashing water temperature control of step (4) is at 40～50 ℃; The enzyme biological respinse of step (2) carries out under aeration condition, and strains the hydrophone periodic duty by one, realizes alkaline enzyme water, acidicenzym water, clear water recycles and Separation of Solid and Liquid.
The post processing of step (3) is that solid matter and residue that the ezyme bio-reactor precipitation produces are evacuated to concentration basin, supernatant is evacuated to that Rinsing Area recycles or directly be back to ezyme bio-reactor after the Separation of Solid and Liquid, aqueous solid material after concentrating is evacuated to the further Separation of Solid and Liquid of filter press through screw pump, the mud cake that contains the Cr2O3 pollutant is transported to professional processed in units, and filtrate is back to Rinsing Area or reactor cycles is used.
For solving the problems of the technologies described above, another technical scheme of the present invention is: the device of processing leather wastes, comprise ezyme bio-reactor, and membrane separation device is connected with this ezyme bio-reactor.
Described ezyme bio-reactor is provided with strains hydrophone, and this is strained hydrophone and has many cover outlet systems and corresponding alkali groove, acid tank, Rinsing Area, forms closed circuit with described ezyme bio-reactor.
Described membrane separator is provided with film device and back purge system, and this film device adopts micro-filtration or milipore filter.
The device of this processing leather wastes also further comprise be connected with described ezyme bio-reactor be used for the pretreated rinsing maching of discarded object, immersion machine, disintegrating machine, and the concentration basin and the filter press that are used for the solid product of treatment enzyme bioreactor generation, between this concentration basin and filter press screw pump is installed.
Described ezyme bio-reactor and membrane separation device are the device that jacket type can be controlled heating or constant temperature; This ezyme bio-reactor also is provided with the Aeration fan of aeration head and forced air supply.
The invention has the beneficial effects as follows: the method for processing leather wastes of the present invention adopts preliminary treatment, sequencing batch type ezyme bio-reactor and membrane separation technique, replaced conventional method, leather castoff is processed, can make leather castoff processing back recycling, make the higher collagen of added value (medical, cosmetics, beauty treatment, nutrient solution) and gelatin (edible, medical) and other industrial raw material, realize back operation sewage zero-discharge simultaneously, have good social benefit and economic benefit.
In addition, the device of processing leather wastes of the present invention adopts sequencing batch type ezyme bio-reactor and membrane separation device, and floor space is little, cost is low, treatment effect is good, realizes back operation sewage zero-discharge.
Device of the present invention also can be realized recycling of material, makes full use of limited resources performance maximum utility.
Description of drawings
Fig. 1 is leather castoff processing technological flow figure of the present invention.
The specific embodiment
The present invention is method and the device that utilizes sequencing batch type ezyme bio-reactor and membrane separation technique processing leather wastes.
For the collagen of leather castoff being made high added value has several key technologies:
(1) biologic treating technique, particularly enzyme treatment technique;
(2) temperature control generally must be below 70 ℃, and the high-quality control of product is below 40 ℃;
(3) solid-liquid separation technique (precipitation, filtration etc.); And
(4) purify.
Please refer to the processing technological flow figure of Fig. 1.Device of the present invention mainly comprises leather castoff pretreatment unit, ezyme bio-reactor 4, membrane separator 7 and solid after-treatment device.
The leather castoff pretreatment unit comprises rinsing maching 1, immersion machine 2, disintegrating machine 3 in the present embodiment.
Ezyme bio-reactor 4 is provided with strains hydrophone 5, and this is strained hydrophone 5 and has many cover outlet systems and corresponding alkali groove, acid tank, Rinsing Area, forms closed circuits with described ezyme bio-reactor 4.This ezyme bio-reactor 4 also is provided with aeration head, with three leaf roots blower forced air supply aerations.
Membrane separator 7 is provided with film device 6 and back purge system (figure does not show), and this film device adopts micro-filtration or milipore filter.This membrane separator 7 can be selected jacket type for use, by multiple modes such as electrical heating, steam heated, hot water circuit.Can select for use a plurality of membrane separator serial or parallel connections to use.
After-treatment device is used for the solid product that treatment enzyme bioreactor 4 produces, and mainly comprises concentration basin 9 and filter press 10, installs screw pump between the two.
The present invention utilizes sequencing batch type ezyme bio-reactor 4 and membrane separation technique processing leather wastes, produces protein matter, comprises different brackets collagen and other high value added product (as gelatin etc.), and its method mainly may further comprise the steps:
(1) leather castoff drops into rinsing maching 1, immersion machine 2, disintegrating machine 3 after looking its pollution condition classification successively, makes leather castoff form the less substrate of particle and enters in the sequencing batch type ezyme bio-reactor 4;
(2) in sequencing batch type ezyme bio-reactor 4, finish: the alkaline enzyme water of the alkaline enzyme water of charging-advance-precipitate-go out-advance acidicenzym water-precipitate-go out acidicenzym water-advance clear water-precipitate-go out liquid form product;
(3) the soluble solid matter of step (2) precipitation and the residual residue that anchors on the solid matter are carried out post processing; And
(4) liquid form product of step (2) enters membrane separator 7 and carries out the film separating treatment and make collagen and other high value added product.
Rinsing maching 1, immersion machine 2 are worked at normal temperatures in the step (1), are not damaged to ensure collagen.Disintegrating machine 3 adopts screw rod to push automatic shredding machine, enters in the sequencing batch type ezyme bio-reactor 4 so that leather castoff forms the less substrate of particle.
In the step (2), charging is meant that leather castoff forms the less substrate of particle and enters in the sequencing batch type ezyme bio-reactor 4.Ezyme bio-reactor 4 is a jacket type, can be by multiple modes such as electrical heating, steam heated, hot water circuit, control is heated or constant temperature automatically, and the temperature that guarantees this reactor 4 is under middle temperature, generally should be lower than 70 ℃, preferably be lower than 40 ℃ (can select the mode of hot water circuit heating for use).Under the temperature, be lower than 70 ℃ in ezyme bio-reactor 4, preferably be lower than 40 ℃, biology enzyme carries out complicated biochemical reaction.Through the biochemical action of enzyme, the harmful substance in the leather castoff is separated with solid-state form, solid-state leather is decomposed into solid-liquid mixing underflow product.This mixture contains product, insoluble substrate and catalyst.Ezyme bio-reactor 4 makes and can not form insoluble solid matter by biochemical chromium pollutant, and makes product harmless, nontoxic, ensures that product can be used as high value added product and is extensive use of.
Be provided with in the ezyme bio-reactor 4 and strain hydrophone 5, this strains hydrophone 5 many cover outlet systems and corresponding alkali groove, acid tank, Rinsing Area, utilize liquid level and micro computer time controller to realize straining the operation continuously automatically of hydrophone 5, blower fan aeration, magnetic valve, pump, hand switch is set simultaneously, finishes Artificial Control.
Reactor 4 can be finished into water (alkalescence, acid, clear water) by sequencing batch type in some cycles; Alkalescence enzyme aeration, precipitation, separation; Acidicenzym aeration, precipitation, separation; Precipitation; Strain hydrophone 5 discharge opeings work such as (liquid form products).By straining hydrophone 5 periodic duties, realize recycling of alkali lye, acid solution, and Separation of Solid and Liquid, the while can be improved the concentration and the activity of ezyme bio-reactor 4 each conversion zones.Wherein, the precipitation substrate can be used as the carrier of enzyme biological agent in ezyme bio-reactor 4, and catalyst and enzyme bacterium anchor on the carrier, to improve enzyme action activity and biological agent efficient.
In this step, the 4 biochemical reaction stages of reactor need aeration, and this reactor organisms bacterial classification is worked under aerobic condition, and the shortening time is improved biochemical treatment efficient.Chlorination equipment is set behind the blower fan, guarantee the air that supplies nontoxic, under aerobic condition, can improve its living things catalysis efficient.
Step (3) be with ezyme bio-reactor 4 produce can not biochemical chromium pollutant solid, regularly be evacuated to concentration basin 9, supernatant is evacuated to that Rinsing Area recycles or directly be back to ezyme bio-reactor 4 after the preliminary Separation of Solid and Liquid, aqueous solid material after concentrating is evacuated to plate and frame filter press 10 further Separation of Solid and Liquid through screw pump, contains Cr
2O
3Mud cake Deng pollutant is transported to professional processed in units, and filtrate is back to Rinsing Area or reactor 4 recycles.
In the step (4), membrane separator 7 is provided with thermostatic container, is provided with film device 6 in container.This film device 6 adopts micro-filtration or milipore filter etc., its specification (being mainly aperture, membrane flux, operating pressure) is decided on the specification that product (collagen or gelatin) requires, their effect mainly is from coming out with the moisture in the liquid product, this device is under middle temperature, generally be lower than 70 ℃, preferably be lower than 40 ℃ of work down.
With the means of film device, can reduce cost, ensure product quality as concentrated and purified product.
Membrane separation device 7 is established corresponding film back purge system (figure does not show), prevents the obstruction of film, guarantees its smooth and easy work.Backwashing water is controlled at 40～70 ℃, and preferred 40～50 ℃ of effects are preferable.Clear water is pumped to clear water reserviors 8 by pump in this step, and operation was used before clear water was equipped with.The structure of back purge system is divided built-in and external two kinds.The built-in device that is meant the clear water batch (-type) water under high pressure vibration cleaning film outer wall pollutant that in membrane separation device 7, is provided with; External being meant is promoted to the device that water under high pressure flush clean film outer wall pollutant is adopted in gap, membrane separator 7 top with film device 6.
Be evacuated to clear water reserviors 8 by the clear water behind the membrane filtration and recycle, the concentrated product before the film drains in finished product bottle or the bucket, and take out the packing back.If product need be made solid, the vacuum dryer of available routine is finished.
Membrane separation device 7 can be selected jacket type for use, can control the device of heating or constant temperature by multiple modes such as electrical heating, steam heated, hot water circuit automatically, guarantees it in middle temperature, generally is lower than 70 ℃, preferably is lower than 40 ℃ of work down.Can use a plurality of membrane separation device 7 parallel connections or tandem work.
Be appreciated that, enzyme biological reaction pool 4 receives clear water, the alkaline enzyme liquid of alkali groove, the acidicenzym liquid of acid tank and the filtrate of filter press 10 of membrane separation device 7 in the present embodiment, can improve its enzyme concentration and activity, shorten its work period, realize back operation sewage zero-discharge simultaneously.
In addition, when the kind of leather castoff is changed, must clean, sterilize, need clean especially during particularly production high added value collagen, sterilize all devices in this technology, nontoxic to guarantee product.
Utilize method of the present invention and device to handle in the leather castoff process, process conditions such as the composition of material, consumption, processing time need to determine according to the treatment types of leather castoff and treating capacity.
Example 1
Sequencing batch type ezyme bio-reactor rate of charge (weight portion) is:
Leather castoff: water (alkali lye, acid solution, clear water): enzyme
100∶200～300∶0.05～0.15
The processing time of sequencing batch type ezyme bio-reactor is: fed intake 0.5 hour, and alkaline enzyme aeration 2.0～3.0 hours, precipitation was strained water 1.5～2.0 hours, acidicenzym aeration 2.0～3.0 hours, precipitated/strain water 1.5～2.0 hours, neutral enzymatic aeration 2.0～3.0 hours precipitated/strains water 1.5～2.0 hours; The membrane separation device processing time is 1.5～2.0 hours.Keeping ezyme bio-reactor 4 and film device 6 interior temperature is 35 ℃, and the backwash water temperature is 45 ℃.Be collagen then by the product that comes out of purifying in the membrane separator 7, and without sewage discharge in the operation of back.
Claims (10)
1, a kind of method of processing leather wastes, it may further comprise the steps:
(1) leather castoff is carried out preliminary treatment and form the granule substrate;
(2) ezyme bio-reactor sequencing batch type in some cycles carries out: the alkaline enzyme water of the alkaline enzyme water of little material substrate charging-advance-precipitate-go out-advance acidicenzym water-precipitate-go out acidicenzym water-advance clear water-precipitate-go out liquid form product;
(3) step (2) precipitated solid material and residue are carried out post processing; And
(4) liquid form product of step (2) is carried out the film separating treatment and make the protide product.
2, the method for processing leather wastes as claimed in claim 1 is characterized in that: the preliminary treatment of step (1) comprises washing, immersion, fragmentation, wherein washes, soaks at normal temperatures and finish, and the broken screw rod that adopts pushes automatic shredding machine.
3, the method for processing leather wastes as claimed in claim 1 is characterized in that: the membrane separator operating temperature of step (2) ezyme bio-reactor and step (4) is lower than 70 ℃; Step (4) also comprises backwash technique, and the backwashing water temperature control is at 40～70 ℃.
4, the method for processing leather wastes as claimed in claim 3 is characterized in that: the membrane separator operating temperature of step (2) ezyme bio-reactor and step (4) is lower than 40 ℃, and the backwashing water temperature control of step (4) is at 40～50 ℃; The enzyme biological respinse of step (2) carries out under aeration condition, and strains the hydrophone periodic duty by one, realizes alkaline enzyme water, acidicenzym water, clear water recycles and Separation of Solid and Liquid.
5, the method for processing leather wastes as claimed in claim 1, it is characterized in that: the post processing of step (3) is that solid matter and residue that the ezyme bio-reactor precipitation produces are evacuated to concentration basin, supernatant is evacuated to that Rinsing Area recycles or directly be back to ezyme bio-reactor after the Separation of Solid and Liquid, aqueous solid material after concentrating is evacuated to the further Separation of Solid and Liquid of filter press through screw pump, contains Cr
2O
3The mud cake of pollutant is transported to professional processed in units, and filtrate is back to Rinsing Area or reactor cycles is used.
6, a kind of device of processing leather wastes comprises ezyme bio-reactor, it is characterized in that: membrane separation device is connected with this ezyme bio-reactor.
7, the device of processing leather wastes as claimed in claim 6, it is characterized in that: described ezyme bio-reactor is provided with strains hydrophone, this is strained hydrophone and has many cover outlet systems and corresponding alkali groove, acid tank, Rinsing Area, forms closed circuit with described ezyme bio-reactor.
8, the device of processing leather wastes as claimed in claim 6 is characterized in that: described membrane separator is provided with film device and back purge system, and this film device adopts micro-filtration or milipore filter.
9, the device of processing leather wastes as claimed in claim 6, it is characterized in that: the device of this processing leather wastes also further comprise be connected with described ezyme bio-reactor be used for the pretreated rinsing maching of discarded object, immersion machine, disintegrating machine, and the concentration basin and the filter press that are used for the solid product of treatment enzyme bioreactor generation, between this concentration basin and filter press screw pump is installed.
10, processing leather wastes device as claimed in claim 6 is characterized in that: described ezyme bio-reactor and membrane separation device are the device that jacket type can be controlled heating or constant temperature; This ezyme bio-reactor also is provided with the Aeration fan of aeration head and forced air supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610008061A CN100579676C (en) | 2006-02-27 | 2006-02-27 | Method and apparatus for processing leather wastes |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200610008061A CN100579676C (en) | 2006-02-27 | 2006-02-27 | Method and apparatus for processing leather wastes |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1806947A true CN1806947A (en) | 2006-07-26 |
| CN100579676C CN100579676C (en) | 2010-01-13 |
Family
ID=36839142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200610008061A Expired - Fee Related CN100579676C (en) | 2006-02-27 | 2006-02-27 | Method and apparatus for processing leather wastes |
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|---|---|
| CN (1) | CN100579676C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106334707A (en) * | 2016-11-11 | 2017-01-18 | 成都陵川特种工业有限责任公司 | Deoiling and recycling system adopting material scraping plate |
| CN108658071A (en) * | 2017-03-31 | 2018-10-16 | 北京化工大学 | It is a kind of using chromium skin as biomass porous carbon of raw material and its preparation method and application |
| CN112592400A (en) * | 2020-10-16 | 2021-04-02 | 海南圣岛科技有限公司 | Blue leather filament primary recovery processing device and working method thereof |
-
2006
- 2006-02-27 CN CN200610008061A patent/CN100579676C/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106334707A (en) * | 2016-11-11 | 2017-01-18 | 成都陵川特种工业有限责任公司 | Deoiling and recycling system adopting material scraping plate |
| CN108658071A (en) * | 2017-03-31 | 2018-10-16 | 北京化工大学 | It is a kind of using chromium skin as biomass porous carbon of raw material and its preparation method and application |
| CN108658071B (en) * | 2017-03-31 | 2021-02-19 | 北京化工大学 | Biomass porous carbon taking chromium skin as raw material and preparation method and application thereof |
| CN112592400A (en) * | 2020-10-16 | 2021-04-02 | 海南圣岛科技有限公司 | Blue leather filament primary recovery processing device and working method thereof |
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| Publication number | Publication date |
|---|---|
| CN100579676C (en) | 2010-01-13 |
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