CN109629296A - A kind of biological mechanical pulp preparation method of hot water treatment collaboration cellulase treatment - Google Patents
A kind of biological mechanical pulp preparation method of hot water treatment collaboration cellulase treatment Download PDFInfo
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- CN109629296A CN109629296A CN201811640503.XA CN201811640503A CN109629296A CN 109629296 A CN109629296 A CN 109629296A CN 201811640503 A CN201811640503 A CN 201811640503A CN 109629296 A CN109629296 A CN 109629296A
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- wheat straw
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C5/00—Other processes for obtaining cellulose, e.g. cooking cotton linters ; Processes characterised by the choice of cellulose-containing starting materials
- D21C5/005—Treatment of cellulose-containing material with microorganisms or enzymes
Abstract
This disclosure relates to a kind of biological mechanical pulp preparation method of hot water treatment collaboration cellulase treatment, using the waste of crops wheat as pulping raw material, wheat straw is handled using atmospheric hot-water, simultaneously plus micro alkali adjusts the pH value of hot water in 10-14, to dissolve out part hemicellulose in wheat straw, lignin, after the substances such as pectin, after wheat straw saturation softening, carry out screw extrusion processing, make wheat straw physics sub-wire, then cellulase treatment is carried out, after cellulase treatment, fiber further softens, then defibrination is carried out to wheat straw, reach the requirement of production primary colors packaging group paper and paper base material.
Description
Technical field
The disclosure belongs to paper technology and field of new materials, and in particular to a kind of life of hot water treatment collaboration cellulase treatment
Object mechanical pulp preparation method.
Background technique
Here statement only provides background information related with the disclosure, without necessarily constituting the prior art.
Paper industry is important basic raw material industry, and particularly significant status is occupied in national economy.It is sent out with society
Exhibition and social civilization are closely bound up, and the level of consumption of paper and cardboard is to measure the important mark of a modernization of the country and civilization degree
One of will.China's pulp import in 2016 is up to 21,060,000 tons, and up to 28,500,000 tons, the import of raw material of papermaking fiber relies on waste paper importation
For degree close to 50%, a large amount of imports of waste paper compensate for the notch of China's fibrous raw material, support the development of paper-making industry.2017
April, center was issued " about forbidding foreign rubbish immigration to promote solid waste import Management System Reform embodiment ", was clearly advised
The fixed China Di Qi waste paper that nonimportation is not sorted from this year.Waste paper importation total value is 33% in 2017 within 2018, is arrived
The year two thousand twenty, China's nonimportation waste paper.China is faced with the annual paper making raw material for lacking 26,000,000 tons or so.Traditional papermaking
The problem of industry resource shortage will be highlighted further.Solve the problems, such as that paper making raw material is in short supply extremely urgent as early as possible.
Pulping and paper-making plant fiber resource one of of the wheat straw raw material as great distinct Chinese characteristics, the hair of paper industry in China
Very important effect was once being played in exhibition course, occupied considerable status, once in pulping raw material structure for me
The pulp and paper industry of state develops, or even the construction of entire national economy is made that great contribution.But current pulping and paper-making
In the process, general only to utilize wheat straw waste, and wheat leaf, leaf sheath etc. are removed, it cannot achieve the complete utilization of small wheat harvesting waste.
Summary of the invention
For background technique, the disclosure proposes a kind of biological machine of whole wheat grass castoff heat water process collaboration cellulase treatment
The preparation process of tool slurry.
Specific technical solution is as follows:
In the first aspect of the disclosure, a kind of biological mechanical pulp preparation side of hot water treatment collaboration cellulase treatment is provided
Method, method includes the following steps:
(1) to obtain the waste wheat straw after wheat grain as raw material, hot water is carried out to wheat straw according to the liquor ratio of 1:4-1:8
Processing, while micro alkali is added, the pH value for adjusting hot water is 10-14, and treatment temperature is 80-100 DEG C, time 15-60min；
(2) after hot water treatment, wheat straw is subjected to extruding sub-wire；
(3) wheat straw after sub-wire is acted on alkaline biological complex enzyme, treatment temperature is 40-60 DEG C, handles the time
For 30-90min；
(4) wheat straw after biological treatment is subjected to defibrination.
In the second aspect of the disclosure, the biological mechanical pulp being prepared using the above method is provided.
In terms of the third of the disclosure, the biological mechanical pulp is provided in preparing corrugated paper or the non-surface layer paper of boxboard
Application.
At the 4th aspect of the disclosure, the paper base material being prepared using the biological mechanical pulp is provided.
Compared with the relevant technologies that the present inventor knows, the one of technical solution of the disclosure has following beneficial to effect
Fruit:
The disclosure is raw material using agropyron waste, using biotechnology and mechanical means, is guaranteeing that paper waste follows
Ring utilizes, and in the case where not increasing discharge of wastewater, not causing environmental pollution, has developed excellent biological mechanical pulp preparation side
Method largely solves the problems, such as raw material of papermaking fiber shortage.Meanwhile agricultural wastes obtain high value added utilization, it can
It is effectively docked with agriculture, rural areas and farmers problem, prevents the burning of agricultural waste material from source, realize economic and social benefit bumper harvests.
The disclosure is directed to whole wheat waste (wheat straw waste, Mai Ye and leaf sheath), has been put forward for the first time small wheat harvesting waste
Complete utilization technology proposes the new concept of the softening of hot water saturation, primary colors biological mechanical pulp；It is multiple hot water collaboration alkalinity has been put forward for the first time
The new technology of preparing that biological enzyme prepares high-intensitive primary colors biological mechanical pulp is closed, the more traditional mechanical pulp of the technology compares, can
40% or more refining energy consumption is saved, every physical index has reached the requirement of production wrapping paper and paper base material.Especially watt
There is relatively broad application in terms of the wrapping papers such as stupefied paper and the non-surface layer of boxboard and paper base material.
The disclosure handles wheat straw using the waste of crops wheat as pulping raw material, using atmospheric hot-water, adds simultaneously
Micro alkali adjusts the pH value of hot water in 10-14, and after dissolving out the substances such as part hemicellulose, lignin, pectin in wheat straw, wheat straw is full
After softening, screw extrusion processing is carried out, wheat straw physics sub-wire is made, then carries out cellulase treatment, after cellulase treatment, fiber
Then further softening carries out defibrination to wheat straw, reach the requirement of production primary colors packaging group paper and paper base material.Especially watt
There is relatively broad application in terms of the wrapping papers such as stupefied paper and the non-surface layer of boxboard and paper base material.
Specific embodiment
It is noted that described further below be all exemplary, it is intended to provide further instruction to the disclosure.Unless another
It indicates, all technical and scientific terms used herein has usual with disclosure person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the disclosure.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation and/or their combination.
In the disclosure, liquor ratio refers to the cooking liquor ratio of raw material, liquor ratio: boiling over dry raw material weight and the total liquid measure volume of boiling
The ratio between.
In first typical embodiment of the disclosure, a kind of biology of hot water treatment collaboration cellulase treatment is provided
Mechanical pulp preparation method, method includes the following steps:
(1) to obtain the waste wheat straw after wheat grain as raw material, hot water is carried out to wheat straw according to the liquor ratio of 1:4-1:8
Processing, while micro alkali is added, the pH value for adjusting hot water is 10-14, and treatment temperature is 80-100 DEG C, time 15-60min；
(2) after hot water treatment, wheat straw is subjected to extruding sub-wire；
(3) wheat straw after sub-wire is acted on alkaline biological complex enzyme, treatment temperature is 40-60 DEG C, handles the time
For 30-90min；
(4) wheat straw after biological treatment is subjected to defibrination.
Raw material used in the disclosure is the waste wheat straw obtained after wheat grain, including wheat leaf, stalk and leaf sheath,
In, its chemical composition of different parts and chemical structure difference, in terms of chemical composition, ash content, the alkali extractive of Mai Ye and leaf sheath
All it is higher than stalk position with pentosan content, content of cellulose is far below stalk position；In terms of chemical structure, stalk position
Fiber is longer, and basal part of stem is longer than in the middle part of stem, and the fibrocyte of Mai Ye and leaf sheath is shorter than stalk position and thick.As it can be seen that not
It is very uneven with its raw material mix of wheat straw position and chemical composition and fibre morphology, the subsequent slurries for preparing excellent properties are made
At very big difficulty.In general, in the prior art using the more of careless class stalk papermaking, but pass through the wound of the applicant
Recent studies on obtains a kind of pulping technique for whole wheat waste, by the pulping technique, can be improved the benefit at each wheat straw position
With rate, the higher paper base material of surface strength is obtained.And the fiber uniformity for the biological mechanical pulp being prepared by the technology
It is good, it is especially suitable for preparing wrapping papers and the paper base material such as fluting medium and the non-surface layer of boxboard, alternative imported waste paper raw material.
In step (1), waste wheat straw is cut into the standby raw material of 3-6cm long, is air-dried.
In step (1), the liquor ratio is 1:4-1:8 (g/mL), by a large amount of experimental verification and analysis, using the liquid
After a certain time, aqueous pH gradually declines the solution of ratio in wheat straw, so that the pH for the biological mechanical pulp being prepared is in
Neutral or alkalescent.
In step (1), micro alkali is added, the pH value for adjusting hot water is 10-14, and the purpose of the alkali added in the hot water is:
On the one hand can make to dissolve out the substances such as least a portion of hemicellulose, lignin and pectin in wheat, on the other hand, auxiliary hot water is as soon as possible
Wheat straw is softened, does basis for next step screw extrusion.
In step (1), hot water treatment temperature is 80-100 DEG C, time 15-60min, wheat straw when processing terminate
PH value reach 7-9.By verification experimental verification, if temperature is too low, it cannot achieve the saturation softening of whole wheat grass hot water, influence subsequent
Sub-wire effect.
In step (2), extruding sub-wire is carried out using screw extruder, process conditions are: the compression ratio control of screw extruder
System is in 1:(3-6).
Wheat straw after full water softening such as is sheared in screw extruder, is stretched, reversed and is suppressed at the synthesis of various power
Effect, further such that the hemicellulose in wheat straw dissolves out, fiber is significantly improved by a degree of damage, screw extrusion
The permeance property of the biological enzyme of wheat straw, so that the function and effect of biological enzyme are more preferable, dosage is reduced.By verification experimental verification, will compress
Than controlling in 1:(3-6), smaller on the reduction of fibre length influence, long fiber fraction variation is smaller.
In step (3), liquor ratio is controlled at 1:3-8 (g/mL).
For the specific wheat straw waste materials after extruding, the alkaline biological complex enzyme selected is zytase, fiber
The compound enzyme of three kinds of enzymes of plain enzyme and pectase, total dosage is: 10-80IU/mL, the enzyme of zytase, cellulase and pectase
Ratio living is (3~6): (2~4): (1~1.5)；Preferably, the total dosage of enzyme is 60~80IU/mL.
By verification experimental verification, the disclosure is raw using zytase, cellulase and pectase the compounding alkalinity of special ratios
Object complex enzyme, degradation effect is significant, is better than complex enzyme in the prior art.
The biological enzyme of use believes biological enzyme formulation Chinese companies from Shandong Longke Enzyme Co., Ltd., Novi.
In step (4), defibrination number is determined according to production needs, and the beating degree of defibrination is controlled in 25-50 ° of SR.
Refining process condition: high consistency refining, 3000~4000r/ of the speed of mainshaft are carried out using KPF series high concentration plate mill
Min, using one section or two sections of defibrinations, grinding clearance 0.15-0.5mm.
Wheat straw after biological treatment is carried out defibrination with fiberizer, while utilizing the heat and height generated during defibrination
Temperature makes biological enzyme inactivation prevent from influencing the intensity of subsequent paper pulp, according to different selection one section of defibrination or two of pulp freeness
Section defibrination.By verification experimental verification, using above-mentioned beating degree and refining process condition, the biological mechanical pulp when system that is prepared
The standby higher fluting medium of paper strength and the non-surface layer paper of boxboard.
In second typical embodiment of the disclosure, the bio-mechanical being prepared using the above method is provided
Slurry.By measurement, the fiber in the biological mechanical pulp is staggeredly uniformly dispersed, and for fibre length than more uniform, paper strength is preferable.Through
Later continuing experimental verification, paper base material burst index, tear index and ring crush index prepared by this kind of biological mechanical pulp is higher,
It is suitble to prepare fluting medium and the non-surface layer wrapping paper of boxboard and paper base material.
In the typical embodiment of third of the disclosure, the biological mechanical pulp is provided and is preparing corrugated paper or case
Application in the non-surface layer paper of paperboard.
In the 4th typical embodiment of the disclosure, the paper base material that the biological mechanical pulp is prepared is provided
Material, the paper base material are fluting medium or the non-surface layer paper of boxboard, and fluting medium is the important composition material for producing corrugated board
One of.Corrugated paper or the non-surface layer paper burst index of boxboard that the disclosure is prepared using above-mentioned biological mechanical pulp, tearing refer to
Several and ring crush index is higher.
In order to enable those skilled in the art can clearly understand the technical solution of the disclosure, below with reference to tool
The technical solution of the disclosure is described in detail in the embodiment of body.
Embodiment 1
A kind of wheat straw hot water collaboration cellulase treatment prepares the technique of biological mechanical pulp, which prepares bio-mechanical
Slurry, and test it and prepare slurry performance.
(1) the air-dried wheat straw after physics being selected dedusting is cut into the standby raw material of 5cm long, is put into normal-temperature reaction kettle, presses
Hot water treatment is carried out to wheat straw according to the liquor ratio of 1:5 (g/mL), temperature is at 90 DEG C, and the control of processing time is in 20min.
(2) to micro NaOH is added in the hot water and wheat straw mixture in reaction kettle, the pH value of hot water is adjusted 14, is made
The substances such as least a portion of hemicellulose, lignin and pectin are dissolved out in wheat straw, while wheat straw satisfies water softening, what processing terminate
When the aqueous pH value of wheat straw reach 9.
(3) wheat straw that full water softens is squeezed on screw extruder, adjusts the pressure of extruder, reaches wheat straw
Uniform good sub-wire effect.The saturation softening sub-wire of wheat straw is preferable, is once squeezed, the compression ratio control of screw extruder
In 1:3.
(4) wheat straw and alkaline biological enzyme after softening sub-wire handle 50min in the bioreactor, and temperature is controlled 50
DEG C, liquor ratio control is stirred continuously mixing wheat straw, acts on wheat straw sufficiently with biological enzyme, further soften wheat straw at 1:4 (g/mL)
Fiber.
The alkalinity biological complex enzyme is the compound enzyme of three kinds of zytase, cellulase and pectase enzymes, and total dosage is
80IU/mL (1ml feed liquid uses 80IU biological enzyme), the enzyme activity ratio of zytase, cellulase and pectase are 3:2:1.
(5) wheat straw after biological treatment is carried out two sections of defibrinations with fiberizer, pulp freeness is made to reach 40 ° of SR.
The technological parameter of the defibrination are as follows: using KPF high concentration plate mill carry out high consistency refining, speed of mainshaft 3000r/min,
Grinding clearance is 0.2mm.
(6) mix it uniformly discongesting device through fiber and discongest the good wheat straw biological mechanical pulp of defibrination, then in page
It is copied on former and type 70g/m is made2Waleng paper.Then its physical strength is measured.Every physical index has reached life
Produce the requirement of primary colors wrapping paper and paper base material.
(7) biological enzyme after screw extrusion is adjusted to the compound enzyme using two kinds of enzymes of zytase and pectase, it is total to use
Amount is 80IU/mL, and the enzyme activity ratio of zytase and pectase is 2:1, other techniques are constant to be tested as a comparison, the life of acquisition
Object mechanical pulp sample as a comparison.
The physical performance index that is slurried that a kind of wheat straw hot water of table 1 collaboration cellulase treatment prepares biological mechanical pulp compares guide look
Table
Embodiment 2
A kind of wheat straw hot water collaboration cellulase treatment prepares the technique of biological mechanical pulp, which prepares biological mechanical pulp
Waleng paper is prepared, and tests its slurry performance.
(1) the air-dried wheat straw after physics being selected dedusting is cut into the standby raw material of 5cm long, is put into normal-temperature reaction kettle, presses
Hot water treatment is carried out to wheat straw according to the liquor ratio of 1:4 (g/mL), temperature is at 100 DEG C, and the control of processing time is in 25min.
(2) to micro alkali KOH is added in the hot water and wheat straw mixture in reaction kettle, the pH value of hot water is adjusted 13,
Make to dissolve out the substances such as least a portion of hemicellulose, lignin and pectin in wheat straw, while wheat straw satisfies water softening, processing terminate
When the aqueous pH value of wheat straw reach 8.
(3) wheat straw that full water softens is squeezed on screw extruder, adjusts the pressure of extruder, reaches wheat straw
Uniform good sub-wire effect.The saturation softening sub-wire of wheat straw is preferable, is once squeezed；The compression ratio of screw extruder controls
In 1:4.
(4) wheat straw and alkaline biological enzyme after softening sub-wire handle 40min in the bioreactor, and temperature is controlled 55
DEG C, liquor ratio control is stirred continuously mixing wheat straw, acts on wheat straw sufficiently with biological enzyme, further soften wheat straw at 1:5 (g/mL)
Fiber.
The alkalinity biological complex enzyme is the compound enzyme of three kinds of zytase, cellulase and pectase enzymes, and total dosage is
60IU/mL, the enzyme activity ratio of zytase, cellulase and pectase are 5:4:1.5.
(5) wheat straw after biological treatment is carried out two sections of defibrinations with fiberizer, pulp freeness is made to reach 42 ° of SR.
The technological parameter of the defibrination are as follows: using KPF high concentration plate mill carry out high consistency refining, speed of mainshaft 3000r/min,
Grinding clearance is 0.25mm.
(6) mix it uniformly discongesting device through fiber and discongest the good wheat straw biological mechanical pulp of defibrination, then in page
It is copied on former and type 80g/m is made2Waleng paper.Then its physical strength is measured.Every physical index has reached production
The requirement of primary colors wrapping paper and paper base material.
(7) biological enzyme after screw extrusion is adjusted to answering using zytase, cellulase and three kinds of enzymes of pectase
With enzyme, total dosage is 60IU/mL, and the enzyme activity ratio of zytase, cellulase and pectase is 1:1:1, other techniques are constant
It tests as a comparison, the biological mechanical pulp of acquisition sample as a comparison.
The physical performance index that is slurried that a kind of wheat straw hot water of table 2 collaboration cellulase treatment prepares biological mechanical pulp compares guide look
Table
Embodiment 3
A kind of wheat straw hot water collaboration cellulase treatment prepares the technique of biological mechanical pulp, which prepares biological mechanical pulp
Waleng paper, and test its slurry performance.
(1) the air-dried wheat straw after physics being selected dedusting is cut into the standby raw material of 5cm long, is put into room temperature processor or reaction
In kettle, hot water treatment is carried out to wheat straw according to the liquor ratio of 1:6 (g/mL), temperature is at 100 DEG C, and the control of processing time is in 30min.
(2) to micro NaOH is added in the hot water and wheat straw mixture in reaction kettle, the pH value of hot water is adjusted 13, is made
The substances such as least a portion of hemicellulose, lignin and pectin are dissolved out in wheat straw, while wheat straw satisfies water softening, what processing terminate
When the aqueous pH value of wheat straw reach 8.
(3) wheat straw that full water softens is squeezed on screw extruder, adjusts the pressure of extruder, reaches wheat straw
Uniform good sub-wire effect.The saturation softening sub-wire of wheat straw is preferable, is once squeezed；The compression ratio of screw extruder controls
In 1:5.
(4) wheat straw and alkaline biological enzyme after softening sub-wire handle 60min in the bioreactor, and temperature is controlled 50
DEG C, liquor ratio control is stirred continuously mixing wheat straw, acts on wheat straw sufficiently with biological enzyme, further soften wheat straw at 1:4 (g/mL)
Fiber.
The alkalinity biological complex enzyme is the compound enzyme of three kinds of zytase, cellulase and pectase enzymes, and total dosage is
40IU/mL, the enzyme activity ratio of zytase, cellulase and pectase are 6:4:1.5.
(5) wheat straw after biological treatment is carried out defibrination with fiberizer, pulp freeness is made to reach 41 ° of SR.
The technological parameter of the defibrination are as follows: using KPF high concentration plate mill carry out high consistency refining, speed of mainshaft 3000r/min,
Using one section of defibrination, grinding clearance 0.15mm.
(6) mix it uniformly discongesting device through fiber and discongest the good wheat straw biological mechanical pulp of defibrination, then in page
It is copied on former and type 50g/m is made2Waleng paper.Then its physical strength is measured.Every physical index has reached production
The requirement of primary colors wrapping paper and paper base material.
(7) the cellulase treatment section after screw extrusion to be removed, other techniques are constant to be used as blank sample to compare test,
The mechanical pulp of acquisition sample as a comparison.
The physical performance index that is slurried that a kind of wheat straw hot water of table 3 collaboration cellulase treatment prepares biological mechanical pulp compares guide look
Table
Above-described embodiment is the preferable embodiment of the disclosure, but embodiment of the present disclosure is not by above-described embodiment
It limits, made changes, modifications, substitutions, combinations, simplifications under other any spiritual essence and principles without departing from the disclosure,
It should be equivalent substitute mode, be included within the protection scope of the disclosure.
Claims (10)
1. a kind of biological mechanical pulp preparation method of hot water treatment collaboration cellulase treatment, characterized in that this method includes following
Step:
(1) to obtain the waste wheat straw after wheat grain as raw material, wheat straw is carried out at hot water according to the liquor ratio of 1:4-1:8
Reason, while micro alkali is added, the pH value for adjusting hot water is 10-14, and treatment temperature is 80-100 DEG C, time 15-60min；
(2) after hot water treatment, wheat straw is subjected to extruding sub-wire；
(3) wheat straw after sub-wire is acted on alkaline biological complex enzyme, treatment temperature is 40-60 DEG C, and the processing time is 30-
90min；
(4) wheat straw after biological treatment is subjected to defibrination.
2. preparation method as described in claim 1, characterized in that in step (1), waste wheat straw is cut into 3-6cm's long
Standby raw material.
3. preparation method as described in claim 1, characterized in that in step (1), the pH value of wheat straw when processing terminate
Reach 7-9.
4. preparation method as described in claim 1, characterized in that in step (2), squeeze using screw extruder and divide
Silk, process conditions are: the compression ratio of screw extruder is controlled in 1:(3-6).
5. preparation method as described in claim 1, characterized in that in step (3), the alkalinity biological complex enzyme is xylan
The compound enzyme of three kinds of enzyme, cellulase and pectase enzymes, total dosage is: 10-80IU/mL, zytase, cellulase and pectin
The enzyme activity ratio of enzyme is (3~6): (2~4): (1~1.5)；Preferably, the total dosage of enzyme is 30~80IU/mL.
6. preparation method as described in claim 1, characterized in that in step (4), defibrination number is determined according to production needs,
The beating degree of defibrination is controlled in 25-50 ° of SR.
7. preparation method as described in claim 1, characterized in that in step (4), refining process condition: high using KPF series
Dense disc mill carries out high consistency refining, and 3000~4000r/min of the speed of mainshaft is using one section or two sections of defibrinations, grinding clearance
0.15-0.5mm。
8. the biological mechanical pulp being prepared using method according to any one of claims 1 to 7.
9. biological mechanical pulp according to any one of claims 8 is preparing the application in corrugated paper.
10. the paper base material being prepared using biological mechanical pulp according to any one of claims 8, characterized in that the paper base material
For fluting medium and the non-surface layer wrapping paper of boxboard and paper base material.
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| CN112726254A (en) * | 2020-12-31 | 2021-04-30 | 齐鲁工业大学 | Method for preparing natural-color biomechanical pulp by using hot water treatment and biological enzyme treatment of wheat straw and fully utilizing byproducts |
| CN113265898A (en) * | 2021-06-11 | 2021-08-17 | 齐鲁工业大学 | Method for pulping wheat straw by using xylanase and pectinase |
| CN113832769A (en) * | 2021-09-06 | 2021-12-24 | 天津科技大学 | Biomass-based papermaking reinforcing agent prepared from agricultural residues as raw materials, method and application |
| CN114837007A (en) * | 2022-06-01 | 2022-08-02 | 齐鲁工业大学 | Method for pulping wheat straw by using composite microbial inoculum |
| CN114921992A (en) * | 2022-06-01 | 2022-08-19 | 齐鲁工业大学 | Preparation method of bio-enzyme treated bio-mechanical pulp |
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| CN112160180A (en) * | 2020-09-15 | 2021-01-01 | 内蒙古林乐生物能源有限责任公司 | Production process of biochemical mechanical pulp |
| CN112726254A (en) * | 2020-12-31 | 2021-04-30 | 齐鲁工业大学 | Method for preparing natural-color biomechanical pulp by using hot water treatment and biological enzyme treatment of wheat straw and fully utilizing byproducts |
| CN113265898A (en) * | 2021-06-11 | 2021-08-17 | 齐鲁工业大学 | Method for pulping wheat straw by using xylanase and pectinase |
| CN113832769A (en) * | 2021-09-06 | 2021-12-24 | 天津科技大学 | Biomass-based papermaking reinforcing agent prepared from agricultural residues as raw materials, method and application |
| CN114837007A (en) * | 2022-06-01 | 2022-08-02 | 齐鲁工业大学 | Method for pulping wheat straw by using composite microbial inoculum |
| CN114921992A (en) * | 2022-06-01 | 2022-08-19 | 齐鲁工业大学 | Preparation method of bio-enzyme treated bio-mechanical pulp |
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