CN1312353C - New process for lipase waste paper deinking - Google Patents
New process for lipase waste paper deinking Download PDFInfo
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- CN1312353C CN1312353C CNB2004100524681A CN200410052468A CN1312353C CN 1312353 C CN1312353 C CN 1312353C CN B2004100524681 A CNB2004100524681 A CN B2004100524681A CN 200410052468 A CN200410052468 A CN 200410052468A CN 1312353 C CN1312353 C CN 1312353C
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/64—Paper recycling
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Abstract
The present invention relates to a new process for lipase waste paper deinking, which relates to a lipase deinking technique for waste paper. The present invention comprises the following steps that (1), one or more kinds of cellulase, xylanase and amylase or pectase are added or not added to lipase so as to obtain a lipase deinking agent; (2), water with the temprerature of 30 to 70 DEG C is added to a high-concentration hydrapulpter, the lipase deinking agent containing 10, 000 U to 500, 000 U of lipase, 0 to 3 kilograms of sodium hydroxide and, 0.05 to 0.5 kilograms of surfactant are orderly added to the high-concentration hydrapulpter for every 100 kilograms of dry waste paper pulp, and paper pulp is added to the high-concentration hydrapulpter so that pulp concentration ranges from 10% to 18%; less than 3 kilograms of hydrogen peroxide is added to the hydrapulpter when the hydrapulpter starts for 5 to 20 minutes, and the hydrapulpter is stopped after running for another 5 to 20 minutes; (3), slag elimination and ink separation are carried out so as to obtain deinked paper pulp. The new process for lipase waste paper deinking can reduce fiber damage, improve yield, save energy, greatly reduce the oxygen consumption of waste water, reduce environmental pollution and reduce cost for waste water treatment.
Description
Technical field:
The present invention relates to the waste paper pulp-making Deinking Technology; Be particularly related to lipase deinking technology.
Background technology:
At present, waste paper has become the important source material source of paper industry, and proportion is increasing.Utilize waste paper to carry out pulping and paper-making, can save a large amount of timber, reduce production costs, alleviate contaminated wastewater, reduce environmental protection investments, reduce water and energy resource consumption.
An important link is exactly deinking in waste paper pulp-making.At present, the method taked of deinking has Mechanical Method, chemical method and biological enzyme.The Mechanical Method power consumption is big, deinking efficiency is poor, the slurry drainability is bad, whiteness is low, pulp quality can not get guaranteeing, so generally do not use separately, can be used as a kind of auxiliary law and uses.What current application was maximum is chemical deinking, is by adding chemicals such as surfactant, NaOH, sodium metasilicate, make some component saponification or hydrolysis in the printing ink, and come off from fiber, reaching the deinking purpose; But have deinking cost height, yield is low, and waste water treatment cost height produces the difficult removal of sicker, many drawbacks such as the easy fouling of equipment.
Enzymatic deinking is a kind of de-inking method that developed recently gets up, and it has overcome the insurmountable problem of many chemical methods, is the desirable substitute of DEINKING CHEMICALS.The enzymatic deinking agent main component that can see at present is cellulase, zytase.These two kinds of enzymes are used for deinking, because it can decompose paper pulp fiber, so have the deficiency that reduces pulp strength and yield.
(English name lipase is a kind ofly promptly to play the special ester bond hydrolase of catalytic action in oil-water termination at outphasing system EC3.1.1.3) to lipase, and the effect substrate is mainly natural oil ﹠ fat, and hydrolysate is diglyceride, monoglyceride, glycerine and aliphatic acid.Lipase can extract from animal, plant, also can be by multiple microorganisms.Because the microbial lipase kind is many, the source is wide, cycle is short, have than animal, wider PH, the operative temperature scope of plant fat enzyme, more selectivity type substrate, be convenient to suitability for industrialized production and purification,, be widely used in industry such as food, medicine, grease, leather, washing agent, papermaking so in the theoretical research of enzyme and practical application, more important role is arranged.
Technology contents:
It can be aliphatic acid and glycerine with the grease hydrolysis as the binding agent in the waste paper printing ink that the object of the invention is to make full use of lipase, printing ink is peeled off and big sheet ink particle is dispersed into the function of little aschistic particle from fiber surface; Design a kind of yield height, chemicals usage is few, and the waste water oxygen demand is little, and sicker is few, and the equipment scaling phenomenon is few, the comprehensive low lipase deinking new technology of deinking cost.
The object of the invention can realize by following scheme.Lipase deinking new technology may further comprise the steps:
(1) preparation of lipase-deinked agent adds or does not add in cellulase, zytase, amylase or the pectase one or more in lipase, mix to such an extent that the lipase-deinked agent is standby.
(2) adding temperature in high density hydraulic pulper is 30～70 ℃ water; by 100 kilograms of absolute dried paper pulps; the lipase-deinked agent that drops into fatty enzyme 10,000 U～500,000 U successively is (by lipase enzyme 10,000 U/ gram alive; need add 1～50 gram lipase), 0～3 kilogram of NaOH, 0.05～0.5 kilogram of surfactant; drop into paper pulp again; making pulp density is 10～18%, and pulper starts 5～20 minutes hydrogen peroxide that add below 3 kilograms, reruns shutdown in 5～20 minutes.
(3) enter slagging-off, separation printing ink operation, get de inked pulp.
Annotate: the consumption of NaOH, surfactant, hydrogen peroxide is by 100% purity meter.
The Several Factors that influences lipase deinking new technology effect is as follows:
A, pulping temperature: determine that according to lipase the best use of temperature the pulping temperature is too high, the active of enzyme significantly descended, cause deinking efficiency to worsen; If temperature is low excessively, enzyme activity is lower.
The addition of b, NaOH is determined according to lipase the best use of PH, the best use of PH height, and the NaOH addition is many, otherwise, add less or do not add.
C, pulping time: pulping time according to size degradation after the pulp brightness adjustment, the time is oversize, can cause too tinyization of ink particle, fiber printing ink is adsorbed onto on the fiber again.
D, hydrogen peroxide addition are adjusted according to the de inked pulp whiteness, and whiteness requires high, and addition is big, otherwise, add less or do not add.
E, separation printing ink mode can be divided into flotation, washing or hybrid mode, surfactant is according to different the selecting of separating oil China ink mode in the step (2), can be one or more of non-ionic surface active agent (as fatty alcohol-polyoxyethylene ether, polyoxyethylene nonylphenol ether) and anion surfactant (as fatty acid soaps, lauryl sodium sulfate); Consumption is determined according to conditions such as wastepaper as raw material, production equipment, production technology, the requirements of paper product whiteness.
F, lipase-deinked agent addition are according to condition adjustment such as wastepaper as raw material, production equipment, production technology, the requirements of paper product whiteness; Within the specific limits, addition is big, and deinking efficiency is good.
Advantage of the present invention is compared with DEINKING CHEMICALS, and lipase-deinked can reduce fibre damage, improves yield; Save the energy; Significantly reduce the waste water oxygen demand, alleviate environmental pollution, reduce cost for wastewater treatment; Use no or little chemicals such as sodium metasilicate, NaOH, reduce sicker and produce, improve the paper product quality, reduce the equipment scaling phenomenon; Reduce the integrated cost of deinking link.With cellulase, zytase is that the biological deinking agent of leading is compared, and advantage mainly is not decompose fiber, the pulp strength height, and the yield height, sicker produces still less, and the deinking integrated cost is lower.
Specific implementation method:
Below in conjunction with specific embodiment the present invention is described in further detail:
Lipase can will be aliphatic acid and glycerine as the grease hydrolysis that links agent in the printing ink, and printing ink is peeled off and big sheet ink particle is dispersed into little aschistic particle from fiber surface.Lipase can be selected the product of market sale for use, as the lipase Resinase of Denmark Novozymes Company production
A 2X and lipase Lipolase
, the SILVER REAGENT lipase that Sigma company produces etc.
The white board lining is produced in example 1, newsprint, papers for books and periodicals, the mixed waste paper deinking of blank sheet of paper limit
1) deinking slurry production procedure:
Raw material → high density hydraulic pulper → high dense slagging-off → flotation → low dense slagging-off → deinking machine chest
2) size degradation deinking operation production method
Lipase Resinase with the production of Denmark Novozymes Company
A 2X and Ningxia Xia Sheng Industrial Group Corporation zytase mix, and it is standby to make the lipase-deinked agent that contains 200,000 U lipase and 20,000 U zytases according to its enzyme work.
The adding temperature is 40 ℃ a water in high density hydraulic pulper; by 100 kilograms of absolute dried paper pulps; drop into the lipase-deinked agent of above-mentioned preparation successively; 0.6 kilogram NaOH; 0.1 kilogram AEO-9 (fatty alcohol-polyoxyethylene ether) and 1: 1 mixture of lauryl sodium sulfate drop into newsprint, magazine paper, blank sheet of paper limit mixed waste paper again, making pulp density is 12%; pulper starts and added 2 kilograms of hydrogen peroxide in 10 minutes, reruns shutdown in 10 minutes.Enter slagging-off, FLOTATION SEPARATION printing ink, the thickening and washing operation gets de inked pulp.
The result shows: floatation and ink removing efficient obviously improves, and the whiteness gain of paper pulp turnover flotation device is compared with chemical deinking and significantly improved, and average whiteness gain reaches 6.5% (ISO).The whiteness of deinking slurry is on average at 60% (ISO), and residual bulk printing ink point reduces than chemical deinking method in the deinking slurry, and the waste water oxygen demand reduces by 30% than chemical method.
Example 2, books and periodicals deinking are produced cultural paper
1) deinking slurry production procedure:
Raw material → high density hydraulic pulper → slagging-off → washing → deinking machine chest
2) size degradation deinking operation production method
Lipase Resinase with the production of Denmark Novozymes Company
A 2X and the neutral cellulase SDC of Ningxia Xia Sheng Industrial Group Corporation mix, and it is standby to make the lipase-deinked agent that contains 100,000 U lipase and 30,000 U cellulases according to its enzyme work.
The adding temperature is 50 ℃ a water in high density hydraulic pulper; by 100 kilograms of absolute dried paper pulps; drop into the lipase-deinked agent of above-mentioned preparation successively; 0.5 kilogram NaOH; 0.1 the kilogram polyoxyethylene nonylphenol ether drops into books and periodicals waste paper again, making pulp density is 15%; pulper starts and added 2 kilograms of hydrogen peroxide in 15 minutes, reruns shutdown in 20 minutes.Enter slagging-off, washing separation printing ink operation, get de inked pulp.
The result shows: the whiteness of deinking slurry is than chemical method height, and average whiteness is at 70% (ISO), and residual bulk printing ink point obviously reduces than chemical deinking method in the deinking slurry, and the waste water oxygen demand reduces by 30% than chemical method.
Claims (2)
1, a kind of lipase deinking new technology is characterized in that described technology may further comprise the steps:
(1) preparation of lipase-deinked agent adds or does not add in cellulase, the zytase one or both in lipase, mix to such an extent that the lipase-deinked agent is standby;
(2) adding temperature in high density hydraulic pulper is 30～70 ℃ water, by 100 kilograms of absolute dried paper pulps, drop into the lipase-deinked agent of fatty enzyme 200,000 U and zytase 20,000 U or the lipase-deinked agent of fatty enzyme 100,000 U and cellulase 30,000 U, 0～3 kilogram of NaOH, 0.05～0.5 kilogram of surfactant successively, drop into paper pulp again, making pulp density is 10～18%, pulper starts 5～20 minutes hydrogen peroxide that add below 3 kilograms, reruns shutdown in 5～20 minutes;
(3) enter slagging-off, separation printing ink operation, get de inked pulp.
2, lipase deinking new technology according to claim 1 is characterized in that surfactant is one or more of non-ionic surface active agent and anion surfactant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100524681A CN1312353C (en) | 2004-11-24 | 2004-11-24 | New process for lipase waste paper deinking |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2004100524681A CN1312353C (en) | 2004-11-24 | 2004-11-24 | New process for lipase waste paper deinking |
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| CN1648331A CN1648331A (en) | 2005-08-03 |
| CN1312353C true CN1312353C (en) | 2007-04-25 |
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| CNB2004100524681A Active CN1312353C (en) | 2004-11-24 | 2004-11-24 | New process for lipase waste paper deinking |
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Families Citing this family (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101718050B (en) * | 2009-11-13 | 2011-04-06 | 福建省嘉丰生物化工有限公司 | Process for de-inking waste newspaper by biologic enzyme |
| CN102926257A (en) * | 2011-08-10 | 2013-02-13 | 山东康地恩生物科技有限公司 | Method for waste paper deinking by using biological enzyme |
| CN103088688B (en) * | 2011-11-02 | 2015-12-02 | 东莞市绿微康生物科技有限公司 | A kind of deinking process for waste paper of cleaner production |
| CN102517949B (en) * | 2011-12-08 | 2013-12-18 | 东莞市绿微康生物科技有限公司 | Environmentally friendly waste paper deinking method |
| CN102493247A (en) * | 2011-12-14 | 2012-06-13 | 中冶美利浆纸有限公司 | Application of book paper to wastepaper deinking instead of office wastepaper |
| CN102605662B (en) * | 2012-04-17 | 2014-03-12 | 浙江景兴纸业股份有限公司 | Waste paper deinking method |
| CN103669067B (en) * | 2012-09-05 | 2015-11-25 | 东莞市绿微康生物科技有限公司 | Floatation process after enzymatic deinking |
| CN103669066B (en) * | 2012-09-05 | 2015-11-25 | 东莞市绿微康生物科技有限公司 | Improve the method for stickies removal effect in waste and old boxboard |
| CN103790054B (en) * | 2012-11-02 | 2016-01-20 | 东莞市绿微康生物科技有限公司 | Improve the method for fine screen efficiency in Cultural Paper pulping process |
| CN103790063B (en) * | 2012-11-02 | 2016-01-20 | 东莞市绿微康生物科技有限公司 | Improve the method for fine screen efficiency in newsprint pulping process |
| CN103790061B (en) * | 2012-11-02 | 2016-01-20 | 东莞市绿微康生物科技有限公司 | Improve the method for fine screen efficiency in wrapping paper pulping process |
| CN103147334B (en) * | 2012-12-26 | 2014-09-24 | 上海尚优生物科技有限公司 | Waste paper deinking method using mixed enzyme |
| CN103437230B (en) * | 2013-08-29 | 2015-10-28 | 华南理工大学 | Based on alkali double loop flotation deinking technique in biology enzyme |
| CN103437231B (en) * | 2013-08-30 | 2016-04-13 | 华南理工大学 | A kind of alkaline enzymatic deinking agent and the technique for applying in deinking thereof |
| CN104695263A (en) * | 2013-12-04 | 2015-06-10 | 东莞市绿微康生物科技有限公司 | Biological enzyme composition used for synchronously processing office waste paper printing ink and gummy substance as well as application thereof |
| CN104694515B (en) * | 2013-12-04 | 2017-08-29 | 安徽绿微康生物科技有限公司 | Cultural Paper ink and gluing thing synchronization process biological enzymatic compositions and its application |
| CN105133410A (en) * | 2015-08-17 | 2015-12-09 | 桂林市独秀纸品有限公司 | Waste paper deinking paper pulp regeneration method |
| CN116463874A (en) * | 2023-02-27 | 2023-07-21 | 江苏理文造纸有限公司 | Waste paper surface ink fiber separation process |
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Owner name: DONGGUAN LEVEKING BIOTECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LUWEIKANG BIO-ENGINEERING CO., LTD., SHENZHEN CITY Effective date: 20111229 |
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