CN111661907A - Treatment method of PVA wastewater from papermaking - Google Patents
Treatment method of PVA wastewater from papermaking Download PDFInfo
- Publication number
- CN111661907A CN111661907A CN202010684596.7A CN202010684596A CN111661907A CN 111661907 A CN111661907 A CN 111661907A CN 202010684596 A CN202010684596 A CN 202010684596A CN 111661907 A CN111661907 A CN 111661907A
- Authority
- CN
- China
- Prior art keywords
- pva
- papermaking
- wastewater
- waste liquid
- recovered
- 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.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/34—Organic compounds containing oxygen
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/26—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof
- C02F2103/28—Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
-
- 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
- C08J2329/00—Characterised by the use of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an alcohol, ether, aldehydo, ketonic, acetal, or ketal radical; Hydrolysed polymers of esters of unsaturated alcohols with saturated carboxylic acids; Derivatives of such polymer
- C08J2329/02—Homopolymers or copolymers of unsaturated alcohols
- C08J2329/04—Polyvinyl alcohol; Partially hydrolysed homopolymers or copolymers of esters of unsaturated alcohols with saturated carboxylic acids
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
- Y02P20/143—Feedstock the feedstock being recycled material, e.g. plastics
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Polymers & Plastics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Sustainable Development (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Removal Of Specific Substances (AREA)
Abstract
The invention discloses a method for treating PVA wastewater from papermaking, belonging to the field of wastewater treatment. The method comprises the following steps: (1) PVA waste liquid quality: the PVA concentration is more than or equal to 5.0 percent; (2) respectively adding 10-14g/L sodium sulfate, 0.8-1.2g/L borax, 0.8-1.2g/L sodium carbonate and 1-2g/L sodium bicarbonate into the PVA waste liquid, stirring, and recovering PVA gel. The invention provides a suitable treatment method for the papermaking wastewater with the PVA concentration content of more than 5%, the method can obviously reduce the water content of the recovered PVA gel, shorten the subsequent treatment time of the recovered PVA gel, and can not influence the recovery rate of COD, and the polymerization degree of the recovered PVA is not greatly changed, so that the method can be directly applied to the production of civil paper with lower quality requirements.
Description
Technical Field
The invention belongs to the field of wastewater treatment, and particularly relates to a treatment method of papermaking PVA wastewater.
Background
Polyvinyl alcohol (PVA) is an important modern process raw material, has good water solubility, adhesiveness, pulp film toughness and wear resistance and strong organic solvent tolerance, is widely applied to the industries of textile, paper product manufacturing, food packaging, medical appliances and the like, and the output and the dosage are increased year by year, so that a large amount of PVA is discharged into the environment, and typically comprises textile desizing wastewater, papermaking wastewater and the like.
The COD of the aqueous PVA solution is high, while the BOD is5/CODcrValue (B/C ratio)<0.1, be difficult to by ordinary microbial degradation utilization, it is very big to handle the degree of difficulty, if accumulate in nature water in a large number, not only can make contaminated water surface foam increase, viscosity increase influences aerobic microbial's activity, still can cause the heavy metal accumulation to lead to more serious ecological problem.
The PVA glue applying process for papermaking is applied to the production process of various banknote papers, the concentration of the PVA glue solution of a finished product is 6.0 +/-0.5%, the COD content is about 100000mg/L, the main components comprise PVA (polyvinyl alcohol), urea, melamine and the like, the treatment of PVA-containing waste water is a difficult problem which troubles the sewage treatment for a long time, the water content in the recovered PVA is large, and the subsequent treatment is needed.
Disclosure of Invention
In order to solve the technical problems, the invention provides a method for treating PVA wastewater from papermaking, which can obviously reduce the water content of the recovered PVA gel on the premise of not reducing the COD recovery rate.
In order to achieve the purpose, the invention adopts the following technical scheme:
(1) PVA waste liquid quality: the PVA concentration is more than or equal to 5.0 percent;
(2) respectively adding 10-14g/L sodium sulfate, 0.8-1.2g/L borax, 0.8-1.2g/L sodium carbonate and 1-2g/L sodium bicarbonate into the PVA waste liquid, stirring, and recovering PVA gel.
Further, the amount of sodium sulfate added was 12 g/L.
Furthermore, the addition amount of borax is 1 g/L.
Further, the amount of sodium carbonate added was 1 g/L.
Further, the amount of sodium hydrogencarbonate added was 1.5 g/L.
Further, the stirring time was 30 min.
Further, the temperature during stirring was 30 ℃.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a suitable treatment method for the papermaking wastewater with the PVA concentration content of more than 5%, the method can obviously reduce the water content of the recovered PVA gel, shorten the subsequent treatment time of the recovered PVA gel, and can not influence the recovery rate of COD, and the polymerization degree of the recovered PVA is not greatly changed, so that the method can be directly applied to the production of civil paper with lower quality requirements.
Detailed Description
Comparative example 1
The comparative example provides a treatment method of PVA wastewater from papermaking, which comprises the following steps:
(1) PVA waste liquid quality: the PVA concentration is 5.4%, the COD is 98000-100000 mg/L, and 200ml of PVA waste liquid is treated in a single test.
(2) Respectively adding 12g/L sodium sulfate, 1g/L borax and 1g/L sodium carbonate into the PVA waste liquid, stirring for 30min at 30 ℃, and measuring the removal rate of COD in the PVA waste liquid and the water content of the recovered PVA gel.
Comparative example 2
The comparative example provides a treatment method of PVA wastewater from papermaking, which comprises the following steps:
(1) PVA waste liquid quality: the PVA concentration is 5.4%, the COD is 98000-100000 mg/L, and 200ml of PVA waste liquid is treated in a single test.
(2) Adding 12g/L sodium sulfate, 1g/L borax and 1.5g/L sodium bicarbonate into the PVA waste liquid respectively, stirring for 30min at 30 ℃, and measuring the removal rate of COD in the PVA waste liquid and the water content of the recovered PVA gel.
Comparative example 3
The comparative example provides a treatment method of PVA wastewater from papermaking, which comprises the following steps:
(1) PVA waste liquid quality: the PVA concentration is 5.4%, the COD is 98000-100000 mg/L, and 200ml of PVA waste liquid is treated in a single test.
(2) Respectively adding 12g/L sodium sulfate, 1g/L borax, 1g/L sodium carbonate and 1g/L sodium bicarbonate into the PVA waste liquid, stirring for 30min at 30 ℃, and measuring the removal rate of COD in the PVA waste liquid and the water content of the recovered PVA gel.
Comparative examples 1 to 3 the COD removal rate of the PVA waste liquid and the water content of the recovered PVA gel are shown in Table 1.
TABLE 1
| COD removal rate | PVA gel Water content | |
| Comparative example 1 | 83.7％ | 78.2％ |
| Comparative example 2 | 68.8％ | 80.1％ |
| Comparative example 3 | 85.3％ | 65.4％ |
As can be seen from the above table, when the PVA wastewater is recovered, a small amount of sodium bicarbonate is added, so that the water content of the recovered PVA gel can be obviously improved, and the removal rate of COD can be improved.
Example 1
The embodiment provides a method for treating PVA wastewater from papermaking, which comprises the following steps:
(1) PVA waste liquid quality: the PVA concentration is 5.4%, the COD is 98000-100000 mg/L, and 200ml of PVA waste liquid is treated in a single test.
(2) Respectively adding sodium sulfate, borax, sodium carbonate and sodium bicarbonate into the PVA waste liquid, stirring for 30min at 30 ℃, and measuring the removal rate of COD in the PVA waste liquid and the water content of the recovered PVA gel.
(3) The optimum amounts of the above-mentioned substances were determined by an orthogonal test, and the results are shown in Table 2.
TABLE 2
As is clear from Table 2 above, when the amount of sodium sulfate added was 10g/L, borax 1.0g/L, sodium carbonate 1.0g/L, and sodium hydrogen carbonate 1.5g/L, the removal rate of COD in the PVA wastewater was high and 85.5%, and the water content of the PVA gel recovered was low and 60.9%.
Example 2
This example was conducted by using the optimum protocol obtained in example 1, and the degree of polymerization of the PVA gel obtained therefrom was measured.
Under the determined reaction condition, the relative molecular mass of the recovered PVA is determined by adopting a viscosity method, the average relative molecular mass M of the recovered PVA is equal to 83805 by a Mark equation, the absolute deviation and the relative deviation of the average molecular mass M of the recovered PVA and the PVA raw stock are not large, and the product performance is slightly influenced.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and do not limit the scope of the present invention, and various modifications and improvements of the technical solutions of the present invention can be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are within the scope of the present invention defined by the claims.
Claims (7)
1. A method for treating PVA wastewater from papermaking is characterized by comprising the following steps:
(1) PVA waste liquid quality: the PVA concentration is more than or equal to 5.0 percent;
(2) respectively adding 10-14g/L sodium sulfate, 0.8-1.2g/L borax, 0.8-1.2g/L sodium carbonate and 1-2g/L sodium bicarbonate into the PVA waste liquid, stirring, and recovering PVA gel.
2. The method for treating PVA waste water for papermaking according to claim 1, wherein the sodium sulfate is added in an amount of 12g/L in the step (2).
3. The method for treating PVA waste water for papermaking according to claim 1, wherein the amount of borax added in the step (2) is 1 g/L.
4. The method for treating PVA waste water for papermaking according to claim 1, wherein the sodium carbonate is added in an amount of 1g/L in the step (2).
5. The method for treating PVA waste water for papermaking according to claim 1, wherein the amount of sodium bicarbonate added in step (2) is 1.5 g/L.
6. The method for treating PVA waste water for papermaking according to claim 1, wherein the stirring time in the step (2) is 30 min.
7. The method for treating PVA waste water for papermaking according to claim 1, wherein the temperature during stirring in step (2) is 30 ℃.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010684596.7A CN111661907A (en) | 2020-07-16 | 2020-07-16 | Treatment method of PVA wastewater from papermaking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010684596.7A CN111661907A (en) | 2020-07-16 | 2020-07-16 | Treatment method of PVA wastewater from papermaking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111661907A true CN111661907A (en) | 2020-09-15 |
Family
ID=72392658
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010684596.7A Pending CN111661907A (en) | 2020-07-16 | 2020-07-16 | Treatment method of PVA wastewater from papermaking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111661907A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1533015A (en) * | 1975-03-05 | 1978-11-22 | Sando Iron Works Co | Process for recovering polyvinyl alcohol |
| JPH04330990A (en) * | 1991-05-07 | 1992-11-18 | Japan Small Corp | Treatment of desizing waste water |
| CN105174548A (en) * | 2015-09-25 | 2015-12-23 | 鲁泰纺织股份有限公司 | Method for treating PVA containing desizing waste water |
| CN108314216A (en) * | 2018-03-07 | 2018-07-24 | 南通市环境工程设计院有限公司 | The method that low-cost processes recycle PVA in desized wastewater |
| CN109354322A (en) * | 2018-11-29 | 2019-02-19 | 天津市联合环保工程设计有限公司 | A kind of recovery method and device of the desized wastewater PVA that weaves |
-
2020
- 2020-07-16 CN CN202010684596.7A patent/CN111661907A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1533015A (en) * | 1975-03-05 | 1978-11-22 | Sando Iron Works Co | Process for recovering polyvinyl alcohol |
| JPH04330990A (en) * | 1991-05-07 | 1992-11-18 | Japan Small Corp | Treatment of desizing waste water |
| CN105174548A (en) * | 2015-09-25 | 2015-12-23 | 鲁泰纺织股份有限公司 | Method for treating PVA containing desizing waste water |
| CN108314216A (en) * | 2018-03-07 | 2018-07-24 | 南通市环境工程设计院有限公司 | The method that low-cost processes recycle PVA in desized wastewater |
| CN109354322A (en) * | 2018-11-29 | 2019-02-19 | 天津市联合环保工程设计有限公司 | A kind of recovery method and device of the desized wastewater PVA that weaves |
Non-Patent Citations (2)
| Title |
|---|
| 周立平: "《生态纺织产品最新标准规范和技术应用及质量制手册 中》", 30 June 2004, 安徽文化音像出版社 * |
| 郭丽: "退浆废水中聚乙烯醇的回收研究", 《中国优秀博硕士学位论文全文数据库(硕士)》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103214153B (en) | Regenerative cycle and utilization method for papermaking deep-treatment wastewater | |
| CN101372524B (en) | Process for producing cation polyacrylamide | |
| CN111018137A (en) | Efficient composite carbon source medicament and preparation method thereof | |
| CN112499738B (en) | Papermaking wastewater treating agent and preparation method thereof | |
| CN107473459A (en) | A kind of method of timber processing waste water processing | |
| CN110937762A (en) | PVA-containing desizing printing and dyeing wastewater pretreatment method | |
| CN111661907A (en) | Treatment method of PVA wastewater from papermaking | |
| CN106430793A (en) | Zero discharging method and device for vitamin B2 production waste water | |
| CN105800887A (en) | Method for treating CMC waste water | |
| CN106830554B (en) | Treatment method of photovoltaic industrial wastewater | |
| CN116675318A (en) | Preparation method of flocculant for oily wastewater treatment | |
| CN110642434A (en) | Treatment process for viscose fiber ion exchange purification wastewater | |
| CN106430692A (en) | Chemical method for reducing COD (chemical oxygen demand) of wastewater based on oxidation method | |
| CN110963606A (en) | Preparation method of flocculant applied to organic dye dyeing sewage treatment | |
| CN103159371A (en) | Combined process for treating production wastewater of modified starch | |
| CN102976521B (en) | Decomposition treatment technology for nonbiodegradable chemical compounds in papermaking wastewater | |
| CN102531126B (en) | Method for treating papermaking black liquor with composite coagulation method | |
| CN108503143A (en) | A kind of reactive printing wastewater treatment process | |
| CN108238647A (en) | The process units of coagulant polymeric ferric sulfate | |
| CN204325083U (en) | A kind for the treatment of system of straw-pulp-papermaking wastewater | |
| CN111470722A (en) | Treatment method of rubber processing wastewater difficult to biodegrade | |
| CN106467335A (en) | A kind of method of utilization cellulose base green flocculation material coagulating treatment ultrasound wave pulp-making waste-water | |
| CN104355461A (en) | Method for preprocessing strong black liquor | |
| CN112678933A (en) | Recycling method of magnesium ammonium phosphate | |
| CN107381925B (en) | Method for treating methylene blue wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200915 |