CN111040242A - Secondary degradation treatment process for plastic environment-friendly bag - Google Patents
Secondary degradation treatment process for plastic environment-friendly bag Download PDFInfo
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- CN111040242A CN111040242A CN201911085349.9A CN201911085349A CN111040242A CN 111040242 A CN111040242 A CN 111040242A CN 201911085349 A CN201911085349 A CN 201911085349A CN 111040242 A CN111040242 A CN 111040242A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/105—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with enzymes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B17/00—Recovery of plastics or other constituents of waste material containing plastics
- B29B17/02—Separating plastics from other materials
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/16—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with inorganic material
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/24—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing hydroxyl groups
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
- C08J11/00—Recovery or working-up of waste materials
- C08J11/04—Recovery or working-up of waste materials of polymers
- C08J11/10—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation
- C08J11/18—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material
- C08J11/22—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds
- C08J11/26—Recovery or working-up of waste materials of polymers by chemically breaking down the molecular chains of polymers or breaking of crosslinks, e.g. devulcanisation by treatment with organic material by treatment with organic oxygen-containing compounds containing carboxylic acid groups, their anhydrides or esters
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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
- Y02W30/62—Plastics recycling; Rubber recycling
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention discloses a secondary treatment process for degrading a plastic environment-friendly bag, which comprises the following steps: decomposing natural light; flattening the plastic bag, exposing the plastic bag to natural light, after primary photodegradation is completed, putting the degradation product of the plastic bag into a film shredder for crushing, and primary filtering; putting the shredded plastic decomposition product into a stirring station, adding a high-temperature soaking solution, fully stirring, standing, filtering to remove supernatant, filtering lower-layer turbid liquid and sediment, re-flattening the filtered impurity pile, and performing secondary insolation and biodegradation; the invention relates to a secondary treatment process for degrading a plastic environment-friendly bag, which has the characteristics of low cost and rapid degradation.
Description
Technical Field
The invention belongs to the field of plastic bag degradation, and particularly relates to a secondary degradation treatment process for a plastic environment-friendly bag.
Background
The degradation of plastics refers to the end of life cycle of high molecular polymer, and the degradation of plastics is a mode of reducing the molecular weight of the polymer and the physical properties of polymer materials (plastics), and typically shows that the plastics are brittle, broken, softened, hardened, and lose mechanical strength, and the aging and deterioration of the plastics are degradation phenomena, but the general plastics are degraded into harmless fragments or carbon dioxide and water, and return to natural circulation, and the degradation products are finally decomposed into carbon dioxide and water to be degraded, and the environment-friendly plastic bag is a short form of various biodegradable plastic bags, and with the development of science and technology, various materials capable of replacing traditional PE plastics can be used for replacing traditional PE plastic bags, and the environment-friendly plastic bag is widely applied at present: supermarket shopping bags, rolling preservation bags, mulching films and the like have large-scale application examples in China, the starch-based biodegradable plastic bags are also used in industries such as supermarket and hotel in China Hainan province, and compared with the traditional plastic bags, the environment-friendly plastic bags have the advantages that the complete degradation time is short, the influence on the environment is small, the complete degradation of the environment-friendly plastic bags also needs long time, the degradation time is closely related to the components of the environment-friendly plastic bags, the influence on the environment caused by the naturally degraded environment-friendly plastic bags is still large, how to rapidly degrade the environment-friendly plastic bags is achieved, and the pollution of the plastic bags is reduced to the greatest extent to become an important subject of the current society.
The invention content is as follows:
the invention aims to solve the problems and provide a secondary treatment process for degrading the plastic environment-friendly bag, so that the degradation period of the plastic environment-friendly bag is further reduced, and white pollution is reduced.
In order to solve the above problems, the present invention provides a technical solution:
a secondary treatment process for degrading a plastic environment-friendly bag comprises the following steps:
decomposing natural light;
and (3) flattening the plastic bag, exposing the plastic bag to natural light, and after primary photodegradation is completed, putting the degradation product of the plastic bag into a film shredder for smashing.
Primary filtration;
putting the shredded plastic decomposition product into a stirring station, adding a high-temperature soaking solution, fully stirring, standing, filtering to remove supernatant, filtering to remove lower-layer turbid liquid and sediment, re-flattening the filtered impurity pile, and performing secondary exposure.
Biodegradation;
and (3) putting the insolated and dried impurity pile into a grinder for grinding, pouring bacterial liquid into the ground impurity pile, fully stirring, and putting the impurity pile into a fermentation tank for fermentation and degradation.
Secondary filtration;
filtering the fermented and degraded mixed liquor, detecting the average particle size of the filtered mixed liquor, and putting the impurities into the fermentation tank again for degradation.
Preferably, the thickness of the primary exposed plastic bag stack is not more than 2CM during natural light decomposition, and the degradation time is more than 90 days.
Preferably, during the primary filtration, the temperature of the high-temperature soak solution is 80 ℃, and the components and the mixture ratio of the high-temperature soak solution are as follows: 10 parts of calcium hydroxide, 6 parts of sodium hydroxide, 8 parts of ammonium chloride, 13 parts of ammonium bicarbonate, 12 parts of triethanolamine and 4 parts of polyethylene glycol, wherein the concentration of the high-temperature soaking solution is 0.3moL/L, and the thickness of the secondary exposure impurity pile is not more than 1 CM.
Preferably, during fermentation and degradation, the ratio of the volume of the bacterial liquid to the volume of the impurities is three to two, the fermentation time is 15-20 days, and the volume and the proportion of the bacterial liquid are as follows: 6 parts of aspergillus tubingensis, 5 parts of arthrobacter paraffineus, 10 parts of streptomyces viridis, 7 parts of mucor rouxii and 20 parts of culture medium, wherein the temperature of the bacterial liquid is 20-26 ℃, and the pH value of the bacterial liquid is 6.8-7.2.
Preferably, the primary filtration and the secondary filtration are performed by centrifugal filtration or press filtration.
The invention has the beneficial effects that: compared with the traditional plastic bag degradation process, the secondary degradation treatment process has the characteristics of low cost and rapid degradation, reduces the using amount of soak solution and bacterial solution in the specific process flow, adopts a mode of mutually combining photodegradation and biodegradation to continuously decompose the structure of the plastic, saves the cost of plastic bag degradation, can completely degrade the environment-friendly plastic bag within 8-9 months, shortens the degradation time and avoids white pollution.
The specific implementation mode is as follows:
a secondary treatment process for degrading a plastic environment-friendly bag comprises the following steps:
decomposing natural light;
the plastic bag is spread and exposed to natural light, after primary photodegradation is completed, the degradation product of the plastic bag is thrown into a film shredder to be crushed, groups which are easy to be photodegraded such as ethylene, carbon monoxide copolymer, carbon dioxide copolymer and the like are contained in the plastic synthetic resin, and after the components are degraded, the structure of the environment-friendly plastic bag can be loosened, and the defect that the undegraded plastic bag is difficult to crush is avoided.
Primary filtration;
the shredded plastic decomposer is put into a stirring station, a high-temperature soaking solution is added, the mixture is fully stirred and then is kept stand, supernatant is filtered, lower turbid liquid and sediment are filtered, the filtered impurities are piled up and are flattened again, and secondary insolation is carried out.
Biodegradation;
the method comprises the steps of putting an insolated and dried impurity pile into a grinder for grinding, pouring bacterial liquid into the ground impurity pile, fully stirring, putting the impurity pile into a fermentation tank for fermentation and degradation, wherein bacterial strains in the bacterial liquid can degrade macromolecules of the environment-friendly plastic into micromolecules, and can absorb or convert the micromolecules into other isomers.
Secondary filtration;
filtering the fermented and degraded mixed liquor, detecting the average particle size of the filtered mixed liquor, and putting the impurities into the fermentation tank again for degradation, thereby prolonging the fermentation degradation period of the undegraded impurities.
Wherein, during natural light decomposition, the thickness of the primary plastic bag pile is not more than 2CM, the degradation time is more than 90 days, and the degradable plastic bag can be automatically decomposed after being exposed for 90 days.
Wherein, when filtering for the first time, the temperature of high temperature soak solution is 80 degrees centigrade, and the composition and the proportion of high temperature soak solution are: 10 parts of calcium hydroxide, 6 parts of sodium hydroxide, 8 parts of ammonium chloride, 13 parts of ammonium bicarbonate, 12 parts of triethanolamine and 4 parts of polyethylene glycol, wherein the concentration of the high-temperature soaking solution is 0.3moL/L, the thickness of the secondary insolation impurity pile is not more than 1CM, and the calcium hydroxide, the sodium hydroxide, the ammonium chloride, the ammonium bicarbonate, the triethanolamine and the polyethylene glycol all have strong corrosion action and can denature the environment-friendly plastic.
Wherein, when the fermentation degradation, the ratio of the volume of the bacteria liquid to the volume of the impurities is three to two, the fermentation time is 15-20 days, and the volume and the proportion of the bacteria liquid are as follows: 6 parts of aspergillus tubingensis, 5 parts of arthrobacter paraffinum, 10 parts of streptomyces viridis, 7 parts of mucor rouxii and 20 parts of culture medium, wherein the temperature of the bacterial liquid is 20-26 ℃, the pH value of the bacterial liquid is 6.8-7.2, and the chemical bond of a polymer object can be changed by enzyme generated in the growth process of the aspergillus tubingensis, the arthrobacter paraffinum, the streptomyces viridis and the mucor rouxii, so that the polymer is denatured.
Wherein, the primary filtration and the secondary filtration are carried out by adopting a centrifugal filtration or squeezing filtration mode, and the solid-liquid separation can be realized by utilizing a filter press or a centrifugal filter.
While there have been shown and described what are at present considered to be the fundamental principles of the invention and its essential features and advantages, it will be understood by those skilled in the art that the invention is not limited by the embodiments described above, which are merely illustrative of the principles of the invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.
Claims (5)
1. A secondary treatment process for degrading a plastic environment-friendly bag is characterized by comprising the following steps:
(1) decomposing natural light;
and (3) flattening the plastic bag, exposing the plastic bag to natural light, and after primary photodegradation is completed, putting the degradation product of the plastic bag into a film shredder for smashing.
(2) Primary filtration;
putting the shredded plastic decomposition product into a stirring station, adding a high-temperature soaking solution, fully stirring, standing, filtering to remove supernatant, filtering to remove lower-layer turbid liquid and sediment, re-flattening the filtered impurity pile, and performing secondary exposure.
(3) Biodegradation;
and (3) putting the insolated and dried impurity pile into a grinder for grinding, pouring bacterial liquid into the ground impurity pile, fully stirring, and putting the impurity pile into a fermentation tank for fermentation and degradation.
(4) Secondary filtration;
filtering the fermented and degraded mixed liquor, detecting the average particle size of the filtered mixed liquor, and putting the impurities into the fermentation tank again for degradation.
2. The secondary degradation treatment process of the plastic recycle bag according to claim 1, which is characterized in that: when natural light is decomposed, the thickness of the primary exposed plastic bag pile is not more than 2CM, and the degradation time is more than 90 days.
3. The secondary degradation treatment process of the plastic recycle bag according to claim 1, which is characterized in that: during primary filtration, the temperature of the high-temperature soak solution is 80 ℃, and the components and the mixture ratio of the high-temperature soak solution are as follows: 10 parts of calcium hydroxide, 6 parts of sodium hydroxide, 8 parts of ammonium chloride, 13 parts of ammonium bicarbonate, 12 parts of triethanolamine and 4 parts of polyethylene glycol, wherein the concentration of the high-temperature soaking solution is 0.3moL/L, and the thickness of the secondary exposure impurity pile is not more than 1 CM.
4. The secondary degradation treatment process of the plastic recycle bag according to claim 1, which is characterized in that: when in fermentation degradation, the ratio of the volume of the bacteria liquid to the volume of impurities is three to two, the fermentation time is 15-20 days, and the volume and the proportion of the bacteria liquid are as follows: 6 parts of aspergillus tubingensis, 5 parts of arthrobacter paraffineus, 10 parts of streptomyces viridis, 7 parts of mucor rouxii and 20 parts of culture medium, wherein the temperature of the bacterial liquid is 20-26 ℃, and the pH value of the bacterial liquid is 6.8-7.2.
5. The secondary degradation treatment process of the plastic recycle bag according to claim 1, which is characterized in that: the primary filtration and the secondary filtration are carried out by adopting a centrifugal filtration or a squeezing filtration mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911085349.9A CN111040242A (en) | 2019-11-08 | 2019-11-08 | Secondary degradation treatment process for plastic environment-friendly bag |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911085349.9A CN111040242A (en) | 2019-11-08 | 2019-11-08 | Secondary degradation treatment process for plastic environment-friendly bag |
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| Publication Number | Publication Date |
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| CN111040242A true CN111040242A (en) | 2020-04-21 |
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| CN201911085349.9A Withdrawn CN111040242A (en) | 2019-11-08 | 2019-11-08 | Secondary degradation treatment process for plastic environment-friendly bag |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115466430A (en) * | 2022-10-19 | 2022-12-13 | 山东锦玺润生物科技有限公司 | Rapid degradation process for plastic environment-friendly bag |
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2019
- 2019-11-08 CN CN201911085349.9A patent/CN111040242A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115466430A (en) * | 2022-10-19 | 2022-12-13 | 山东锦玺润生物科技有限公司 | Rapid degradation process for plastic environment-friendly bag |
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Application publication date: 20200421 |