CN104195859B - A kind of method of enzyme auxiliary silica chlorine bleaching bagasse pulp - Google Patents
A kind of method of enzyme auxiliary silica chlorine bleaching bagasse pulp Download PDFInfo
- Publication number
- CN104195859B CN104195859B CN201410489981.0A CN201410489981A CN104195859B CN 104195859 B CN104195859 B CN 104195859B CN 201410489981 A CN201410489981 A CN 201410489981A CN 104195859 B CN104195859 B CN 104195859B
- Authority
- CN
- China
- Prior art keywords
- bleaching
- pretreatment
- clo
- slurry
- enzyme
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Paper (AREA)
Abstract
A kind of method that the present invention relates to enzyme auxiliary silica chlorine bleaching bagasse pulp.Comprise the following steps: (1) hemicellulase pretreatment；(2) ligninase pretreatment；(3) ClO 2 bleaching.The present invention, by carrying out hemicellulase pretreatment and be primarily to and remove the hexenuronic acid and hemicellulose existed in brown stock not floating bagasse pulp, makes residual lignin come out more；The use of ligninase is to come out lignin to remove fiber surface, it is ensured that the chlorine dioxide used in ClO 2 bleaching workshop section is less, reduces and generates AOX in bleaching process.Bagasse pulp is after enzyme pretreatment, and Chlorine has saved 30%～50%, and the formation amount of AOX decreases 40%～60%.
Description
Technical field
The method that the present invention relates to enterprises in pulp and paper industry association with pulp bleaching cleanly production, a kind of method particularly relating to enzyme auxiliary silica chlorine bleaching bagasse pulp.
Background technology
China is that world's paper and production and consumption big country, total growth and aggregate consumption rank first in the world.China is again developing country the biggest in the world, and populous, along with the development of national economy situation, people's material and cultural life becomes increasingly abundant and improves, and the demand of paper and cardboard is very vigorous.So big demand growth, provides very rare opportunity to develop for paper industry, and the thing followed is the fierce market competition.In recent years, in world wide, enterprises in pulp and paper industry competition is more and more fierce, energy-saving and cost-reducing, reduces cost, improves production efficiency and becomes the key that papermaking enterprise is won victory.Paper pulp ECF bleach plant is relatively larger to steam demand amount, and conservative control bleaching process steam uses and energy consumption can be greatly reduced, and saves production cost.
Domestic and international researcher generally believes that the residual lignin in brown stock is the main source of AOX, and chlorine dioxide has been studied with the mechanism that lignin reaction generates AOX.But, under the conditions of cooking of alkalescence and high temperature, the 4-O-methyl glucose alduronic acid on hemicellulose side chain is transformed into 4-deoxidation-4-hexenuronic acid, it is called for short hexenuronic acid (HexA), owing to HexA structure containing carbon-carbon double bond, easily and potassium permanganate generation redox reaction, therefore, the paper pulp kappa number recorded with potassium permanganate some be the contribution of HexA.In general, the Kappa number of hardwood pulp and non-wood pulp is lower than softwood pulp, consider the hemicellulose contribution to Kappa number, when paper pulp kappa number is identical, the lignin content of hardwood pulp and non-wood pulp is lower than needlebush, but when Chlorine is identical, in the bleaching effluent of hardwood pulp and non-wood pulp, the content of AOX and pin wood pulp are suitable, even higher.As can be seen here, in paper pulp, the generation of AOX is had a significant impact by hemicellulose and HexA, and the AOX impact generated is become current paper pulp ECF and bleaches problem demanding prompt solution by research hemicellulose and HexA.
In recent years, a lot of method is had to attempt to reduce bleaching process Chlorine by reducing hemicellulose and hexenuronic acid in paper pulp both at home and abroad, and then AOX discharge capacity in minimizing waste water, as floated front diluted acid elution method, and high temperature ClO 2 bleaching method etc., though being attained by reducing the purpose of AOX content in waste water, but these methods both increase more extra input cost, and input-output ratio is unsatisfactory far away, find a kind of method to improve input-output ratio as much as possible, improve general applicability in the factory and become current problem demanding prompt solution.
Summary of the invention
A kind of method that it is an object of the invention to provide enzyme auxiliary silica chlorine bleaching bagasse pulp, reaches enterprises in pulp and paper industry and saves energy and reduce the cost, reduce the purpose of ambient pollution burden.
The technical scheme is that
A kind of method of enzyme auxiliary silica chlorine bleaching bagasse pulp comprises the following steps, i.e. hemicellulase pretreatment, ligninase pretreatment with and ClO 2 bleaching.
1. hemicellulose enzyme pretreatment:
First being sent into pretreatment bleaching tower and carry out enzyme pretreatment by clean for the washing and screening bagasse slurry that do not float, obtain the pretreated bagasse slurry of enzyme, the process conditions of hemicellulose enzyme pretreatment are: bleaching temperature 65 DEG C, enzyme dosage 20IU/gSlurry～50IU/gSlurry, response time 100min.
2. ligninase pretreatment:
After pretreated for step 1 hemicellulase bagasse slurry washes clean, regulating bagasse slurry weight dense is 11%, and controlling reaction pH is 6-9, reacts subsequently in ligninase pretreater, the process conditions of ligninase pretreatment are: bleaching temperature 50 DEG C, enzyme dosage 20IU/gSlurry～50IU/gSlurry, response time 120min.Course of reaction is monitored in real time temperature and the pH of bagasse slurry, if reaction condition fluctuation is too big, ferment treatment can be produced considerable influence, suitable steam or soda acid should be supplemented in time to ensure stablizing of reaction temperature and pH.
3. ClO 2 bleaching:
From step 2 ligninase pretreater bagasse slurry out scrubbed centrifugal after to adjust pH be 3～4, bagasse slurry weight is dense is 11%, it is subsequently adding ClO 2 solution, ClO 2 bleaching tower is entered after being sufficiently mixed, the process conditions of ClO 2 bleaching are: bleaching temperature 50～60 DEG C, Chlorine is the 1%～3% of bagasse slurry weight, response time 60min.After ClO 2 bleaching reaction terminates, bagasse slurry is sent to following bleaching workshop section then through after washing；
This method makes what whole ClO 2 bleaching process both saved chlorine dioxide to make consumption 30%～50%, reduces again the content 40%～60% of AOX in waste water, reduces the pollution to environment.
Present invention benefit effect compared with the prior art is:
The inventive method makes what the ClO 2 bleaching process of bagasse slurry saved chlorine dioxide to make consumption, reduces the content of AOX in waste water, reduces the pollution to environment.
Detailed description of the invention
The present invention, by carrying out hemicellulase pretreatment and be primarily to and remove the hexenuronic acid and hemicellulose existed in brown stock not floating bagasse pulp, makes residual lignin come out more；The use of ligninase is to come out lignin to remove fiber surface, it is ensured that the chlorine dioxide used in ClO 2 bleaching workshop section is less, reduces and generates AOX in bleaching process.Although ClO 2 bleaching process is not fee from formation AOX, but under controlled conditions, the formation amount of AOX can meet the requirement to papermaking enterprise discharge of wastewater of China's new national standard.
Below in conjunction with embodiment, the invention will be further described.
Embodiment 1
The method of enzyme auxiliary silica chlorine bleaching bagasse pulp；
1. hemicellulose enzyme pretreatment:
First being sent into pretreatment bleaching tower and carry out enzyme pretreatment by clean for the washing and screening bagasse slurry that do not float, obtain the pretreated bagasse slurry of enzyme, the process conditions of hemicellulose enzyme pretreatment are: bleaching temperature 65 DEG C, enzyme dosage 20IU/gSlurry, response time 100min.
2. ligninase pretreatment:
After pretreated for step 1 hemicellulase bagasse slurry washes clean, regulating bagasse slurry weight dense is 11%, and controlling reaction pH is 6-9, reacts subsequently in ligninase pretreater, the process conditions of ligninase pretreatment are: bleaching temperature 50 DEG C, enzyme dosage 20IU/gSlurry, response time 120min.Course of reaction is monitored in real time temperature and the pH of bagasse slurry, if reaction condition fluctuation is too big, ferment treatment can be produced considerable influence, suitable steam or soda acid should be supplemented in time to ensure stablizing of reaction temperature and pH.
3. ClO 2 bleaching:
From step 2 ligninase pretreater bagasse slurry out scrubbed centrifugal after to adjust pH be 3-4, bagasse slurry weight is dense is 11%, it is subsequently adding ClO 2 solution, ClO 2 bleaching tower is entered after being sufficiently mixed, the process conditions of ClO 2 bleaching are: bleaching temperature 50 DEG C, Chlorine is the 1% of bagasse slurry weight, response time 60min.After ClO 2 bleaching reaction terminates, bagasse slurry is sent to following bleaching workshop section then through after washing；
Utilizing this technique that paper pulp is bleached, in contrast to the ClO 2 bleaching method not carrying out pre-pretreatment, when reaching equal whiteness, slurry per ton can save Chlorine 31.1%, and the formation amount of AOX decreases 40.9%.
Embodiment 2
The method of enzyme auxiliary silica chlorine bleaching bagasse pulp:
1. hemicellulose enzyme pretreatment:
First being sent into pretreatment bleaching tower and carry out enzyme pretreatment by clean for the washing and screening bagasse slurry that do not float, obtain the pretreated bagasse slurry of enzyme, the process conditions of hemicellulose enzyme pretreatment are: bleaching temperature 65 DEG C, enzyme dosage 40IU/gSlurry, response time 100min.
2. ligninase pretreatment:
After pretreated for step 1 hemicellulase bagasse slurry washes clean, regulating bagasse slurry weight dense is 11%, and controlling reaction pH is 6-9, reacts subsequently in ligninase pretreater, the process conditions of ligninase pretreatment are: bleaching temperature 50 DEG C, enzyme dosage 40IU/gSlurry, response time 120min.Course of reaction is monitored in real time temperature and the pH of bagasse slurry, if reaction condition fluctuation is too big, ferment treatment can be produced considerable influence, suitable steam or soda acid should be supplemented in time to ensure stablizing of reaction temperature and pH.
3. ClO 2 bleaching:
From step 2 ligninase pretreater bagasse slurry out scrubbed centrifugal after to adjust pH be 3～4, bagasse slurry weight is dense is 11%, it is subsequently adding ClO 2 solution, ClO 2 bleaching tower is entered after being sufficiently mixed, the process conditions of ClO 2 bleaching are: bleaching temperature 60 DEG C, Chlorine is the 2% of bagasse slurry weight, response time 60min.After ClO 2 bleaching reaction terminates, bagasse slurry is sent to following bleaching workshop section then through after washing.
Utilizing this technique that paper pulp is bleached, in contrast to the ClO 2 bleaching method not carrying out pre-pretreatment, when reaching equal whiteness, slurry per ton can save Chlorine 44.6%, and the formation amount of AOX decreases 55.1%.
Embodiment 3
The method of enzyme auxiliary silica chlorine bleaching bagasse pulp:
1. hemicellulose enzyme pretreatment:
First being sent into pretreatment bleaching tower and carry out enzyme pretreatment by clean for the washing and screening bagasse slurry that do not float, obtain the pretreated bagasse slurry of enzyme, the process conditions of hemicellulose enzyme pretreatment are: bleaching temperature 65 DEG C, enzyme dosage 50IU/gSlurry, response time 100min.
2. ligninase pretreatment:
After pretreated for step 1 hemicellulase bagasse slurry washes clean, regulating bagasse slurry weight dense is 11%, and controlling reaction pH is 6-9, reacts subsequently in ligninase pretreater, the process conditions of ligninase pretreatment are: bleaching temperature 50 DEG C, enzyme dosage 50IU/gSlurry, response time 120min.Course of reaction is monitored in real time temperature and the pH of bagasse slurry, if reaction condition fluctuation is too big, ferment treatment can be produced considerable influence, suitable steam or soda acid should be supplemented in time to ensure stablizing of reaction temperature and pH.
Utilizing this technique that paper pulp is bleached, in contrast to the ClO 2 bleaching method not carrying out pre-pretreatment, when reaching equal whiteness, slurry per ton can save Chlorine 51.1%, and the formation amount of AOX decreases 62.2%.
Claims (1)
1. the method for an enzyme auxiliary silica chlorine bleaching bagasse pulp, it is characterised in that: comprise the following steps, i.e. hemicellulase pretreatment, ligninase pretreatment and ClO 2 bleaching；
1) hemicellulose enzyme pretreatment:
Clean for the washing and screening bagasse slurry that do not float first is sent into pretreatment bleaching tower carries out enzyme pretreatment, obtain the pretreated bagasse slurry of enzyme, the process conditions of hemicellulose enzyme pretreatment are: bleaching temperature 65 DEG C, and enzyme dosage 20IU/g slurry～50IU/g starches, response time 100min；
2) ligninase pretreatment:
By step 1) after the pretreated bagasse slurry washes clean of hemicellulase, regulating bagasse slurry weight dense is 11%, controlling reaction pH is 6～9, react subsequently in ligninase pretreater, the process conditions of ligninase pretreatment are: bleaching temperature 50 DEG C, enzyme dosage 20IU/g slurry～50IU/g starches, response time 120min, course of reaction is monitored temperature and the pH of bagasse slurry in real time, if reaction condition fluctuation is too big, ferment treatment can be produced considerable influence, suitable steam or soda acid should be supplemented in time to ensure stablizing of reaction temperature and pH；
3) ClO 2 bleaching:
From step 2) ligninase pretreater bagasse slurry out scrubbed centrifugal after to adjust pH be 3-4, starches dense is 11%, it is subsequently adding ClO 2 solution, ClO 2 bleaching tower is entered after being sufficiently mixed, the process conditions of ClO 2 bleaching are: bleaching temperature 50～60 DEG C, Chlorine is the 1%～3% of bagasse slurry weight, response time 60min；After ClO 2 bleaching reaction terminates, bagasse slurry is sent to following bleaching workshop section then through after washing；
This method makes what whole ClO 2 bleaching process both saved chlorine dioxide to make consumption 30%～50%, reduces again the content 40%～60% of AOX in waste water, reduces the pollution to environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489981.0A CN104195859B (en) | 2014-09-23 | 2014-09-23 | A kind of method of enzyme auxiliary silica chlorine bleaching bagasse pulp |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410489981.0A CN104195859B (en) | 2014-09-23 | 2014-09-23 | A kind of method of enzyme auxiliary silica chlorine bleaching bagasse pulp |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104195859A CN104195859A (en) | 2014-12-10 |
| CN104195859B true CN104195859B (en) | 2016-06-29 |
Family
ID=52081214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410489981.0A Active CN104195859B (en) | 2014-09-23 | 2014-09-23 | A kind of method of enzyme auxiliary silica chlorine bleaching bagasse pulp |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104195859B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104695266B (en) * | 2015-03-26 | 2017-03-01 | 广西大学 | A kind of method that utilization enzyme assists the bleaching of bamboo pulp ECF |
| CN105200836A (en) * | 2015-09-24 | 2015-12-30 | 广西大学 | Method for performing ECF bleaching on bamboo pulp with assistance of bio-enzyme pretreatment |
| CN106283802B (en) * | 2016-09-08 | 2018-01-23 | 广西大学 | A kind of method of photocatalysis auxiliary silica chlorine bleaching paper pulp |
| CN116219794A (en) * | 2022-10-28 | 2023-06-06 | 云南云景林纸股份有限公司 | Preparation method of high-whiteness bagasse pulp |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591304A (en) * | 1991-05-07 | 1997-01-07 | Von Kreisler Selting Werner | Method for the use of enzymes in bleaching paper pulp |
| CN1421570A (en) * | 2002-12-20 | 2003-06-04 | 山东大学 | Enzymatic straw material pulping process |
| CN1793488A (en) * | 2005-11-18 | 2006-06-28 | 山东轻工业学院 | Process for enzyme treating before pulping by plant fibre raw material |
| CN103998680A (en) * | 2011-10-27 | 2014-08-20 | 巴科曼实验室国际公司 | Method and composition for enzymatic treatment of fiber for papermaking, and paper products made therewith |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100346030C (en) * | 2002-03-06 | 2007-10-31 | 埃欧金生物制品公司 | Xylanase treatment of chemical pulp |
-
2014
- 2014-09-23 CN CN201410489981.0A patent/CN104195859B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5591304A (en) * | 1991-05-07 | 1997-01-07 | Von Kreisler Selting Werner | Method for the use of enzymes in bleaching paper pulp |
| CN1421570A (en) * | 2002-12-20 | 2003-06-04 | 山东大学 | Enzymatic straw material pulping process |
| CN1793488A (en) * | 2005-11-18 | 2006-06-28 | 山东轻工业学院 | Process for enzyme treating before pulping by plant fibre raw material |
| CN103998680A (en) * | 2011-10-27 | 2014-08-20 | 巴科曼实验室国际公司 | Method and composition for enzymatic treatment of fiber for papermaking, and paper products made therewith |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104195859A (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Lin et al. | Enzymatic pulping of lignocellulosic biomass | |
| CN104195859B (en) | A kind of method of enzyme auxiliary silica chlorine bleaching bagasse pulp | |
| CN109577059B (en) | Method for preparing biomechanical unbleached pulp by wheat straw | |
| CN104404807A (en) | Method for reducing AOX forming amount in chlorine dioxide bleaching process of bagasse pulp | |
| CN102174760B (en) | Process for preparing pulp by using salix mongolia by chemical mechanical method | |
| CN103726377B (en) | A kind of free pulping method of low polymerization degree bamboo pulp | |
| CN103243597B (en) | A kind of non-wood material free pulping method | |
| CN101514529A (en) | Method for preparing bamboo dissolving pulp by improved prehydrolysis alkaline process and product thereof | |
| CN104695265A (en) | Method using xylanase for assisting chlorine dioxide to bleach paper pulp and reducing generation of AOX | |
| CN104389222A (en) | ECF bleaching method for reducing AOX formation amount | |
| CN102182094B (en) | Salix mongolica sulfate pulp bleaching process | |
| CN102926257A (en) | Method for waste paper deinking by using biological enzyme | |
| CN101760978A (en) | Pulp-bleaching technique | |
| CN102587185B (en) | Method for cleaning and bleaching eucalyptus dissolving pulp | |
| CN101514530A (en) | Method for preparing bagasse dissolving pulp by improved prehydrolysis alkaline process and product thereof | |
| CN104695266A (en) | Method using biological enzymes to assist ECF bleaching of bamboo pulp | |
| CN106283802B (en) | A kind of method of photocatalysis auxiliary silica chlorine bleaching paper pulp | |
| CN104963230A (en) | Bleaching process for improving whiteness of paper pulp | |
| CN104611965A (en) | Pulping method for gum wood high-brightness semi-chemical pulp | |
| CN101230549A (en) | Totally-chlorine-free bleaching method for paper pulp | |
| CN105200836A (en) | Method for performing ECF bleaching on bamboo pulp with assistance of bio-enzyme pretreatment | |
| CN102154886B (en) | Pretreatment process for cleaning and bleaching chemical mechanical pulp | |
| CN103061185B (en) | Paper pulp fully chlorine-free bleaching method | |
| CN102061638B (en) | Process for catalytically bleaching pulp by acetate/persulfate | |
| CN104452394A (en) | Method for reducing hexenuronic acid in bagasse pulp through biological enzyme pretreatment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Nie Shuangxi Inventor after: Wang Shuangfei Inventor after: Yao Shuangquan Inventor after: Song Xueping Inventor after: Qin Chengrong Inventor before: Nie Shuangxi Inventor before: Wang Shuangfei Inventor before: Yao Shuangquan Inventor before: Song Xueping Inventor before: Qin Chengrong |
|
| COR | Change of bibliographic data | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20141210 Assignee: Guangxi Bossco Environmental Protection Technology Co., Ltd. Assignor: Guangxi University Contract record no.: 2019450000013 Denomination of invention: Method for bioenzyme-assisted chlorine dioxide bleaching of bagasse pulp Granted publication date: 20160629 License type: Exclusive License Record date: 20190610 |
|
| EE01 | Entry into force of recordation of patent licensing contract |