CN108298661B - Method for efficiently removing methylene blue by utilizing waste gas generated by jerusalem artichoke core pretreatment - Google Patents
Method for efficiently removing methylene blue by utilizing waste gas generated by jerusalem artichoke core pretreatment Download PDFInfo
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- CN108298661B CN108298661B CN201810096865.0A CN201810096865A CN108298661B CN 108298661 B CN108298661 B CN 108298661B CN 201810096865 A CN201810096865 A CN 201810096865A CN 108298661 B CN108298661 B CN 108298661B
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- jerusalem artichoke
- methylene blue
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- 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
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- 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
- C02F2101/308—Dyes; Colorants; Fluorescent agents
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- 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
- C02F2103/30—Nature of the water, waste water, sewage or sludge to be treated from the textile industry
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Treatment Of Water By Oxidation Or Reduction (AREA)
- Removal Of Specific Substances (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention provides a method for efficiently removing methylene blue by utilizing waste gas generated by jerusalem artichoke core pretreatment, which comprises the following steps: collecting waste gas generated by the jerusalem artichoke core pretreatment, introducing the waste gas into a closed container filled with methylene blue waste liquid, and performing degradation reaction at the temperature of 30-80 ℃; the method for pretreating the jerusalem artichoke core comprises the following steps: placing the jerusalem artichoke cores into a reaction kettle, and adding a concentrated phosphoric acid-hydrogen peroxide mixed reagent for a pretreatment reaction, wherein the mass fraction of the concentrated phosphoric acid is 60.0-70.0%, and the mass fraction of the hydrogen peroxide is 5.0-8.0%. The method has excellent removal effect on common methylene blue, avoids the defect that the existing solid-based and liquid-based treatment technologies need special modification treatment on raw materials, truly realizes the technical purpose of directly treating waste by waste, and realizes the organic combination of two industries of bioethanol preparation and wastewater treatment.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for efficiently removing methylene blue by utilizing waste gas generated by jerusalem artichoke core pretreatment.
Background
China is a traditional textile large country, and in recent years, along with the requirement for transformation of an economic structure, the improvement of a textile production waste treatment technology will be more and more emphasized. The dye is one of main pollutants in the textile production process, has complex components, much biotoxicity and difficult degradability, and is waste water which is difficult to treat.
At this stage, the conventional methods for treating pollution are adsorption, membrane separation, ozone oxidation and photocatalytic methods.
The Chinese patent with the publication number of CN 102659235B provides a method for treating dye wastewater, overcomes the defects of common homogeneous Fenton oxidation by a multiphase Fenton catalytic oxidation mode, and greatly improves the efficiency of treating organic wastewater.
The Chinese patent with the publication number of CN 103588307B provides a method for treating dye wastewater, and the microbial electrochemical coupling system is utilized to realize the improvement of the degradation efficiency of the dye wastewater, and the removal efficiency of acid orange 7 and methyl orange reaches 79 percent and 89.8 percent respectively.
The Chinese patent with the publication number of CN 104725897B provides an ecological environment-friendly treatment method of dye or dye intermediate, which can obtain higher removal effect after heating reaction by adding water, alkaline agent and organic solvent into azo dye or aromatic amine dye.
The Chinese patent with the publication number of CN 103739035B provides a microwave rapid treatment method for dye wastewater, and the degradation treatment efficiency of dye is improved by combining the technology of microwave treatment with nano zero-valent iron.
China with the authorization publication number of CN 104310559B provides a method for treating dye wastewater by using modified straws, and the method realizes the removal effect of more than 95% of the wastewater decolorization rate of orange II and chrome black T dyes and more than 75% of the wastewater decolorization rate of methylene blue dyes by using the modified straws to adsorb the dyes.
As is apparent from the above description of the conventional dye wastewater treatment techniques, the treatment of dye wastewater is generally performed by using a solid adsorbent or a liquid reactant. Although the prior art realizes 'treatment of wastes with wastes' to a certain extent, and products for removing dyes can be obtained by modifying some industrial and agricultural production wastes, the cost of the modification treatment is generally higher, and the popularization and application values are lower. Therefore, the development of a method for treating dyes by using direct wastes generated in the current production activities to treat the dyes by using direct wastes "is the subject of intensive research in the next stage.
Disclosure of Invention
In view of the shortcomings of the prior art, the invention aims to provide a method for efficiently removing methylene blue from waste gas generated by jerusalem artichoke core pretreatment, which comprises the following steps:
collecting waste gas generated by the jerusalem artichoke core pretreatment, introducing the waste gas into a closed container filled with methylene blue waste liquid, and performing degradation reaction at the temperature of 30-80 ℃;
the method for pretreating the jerusalem artichoke core comprises the following steps:
placing the jerusalem artichoke cores into a reaction kettle, and adding a concentrated phosphoric acid-hydrogen peroxide mixed reagent for a pretreatment reaction, wherein the mass fraction of the concentrated phosphoric acid is 60.0-70.0%, and the mass fraction of the hydrogen peroxide is 5.0-8.0%.
The inventors of the present invention conducted a study of pretreatment of a lignocellulosic raw material with concentrated phosphoric acid in combination with hydrogen peroxide for enzymatic hydrolysis in CN 103555774B, and achieved excellent technical effects. Surprisingly, when the inventor uses the method in the patent to introduce the waste gas generated in the pretreatment process by using the jerusalem artichoke core as the raw material into the waste water containing methylene blue, the methylene blue in the waste water is found to be rapidly degraded.
Further, the inventors tested the degradation degree of methylene blue, and found that the removal efficiency of methylene blue reaches 100%. That is, the removal effect of the invention on methylene blue is better than that of the existing general solid-based and liquid-based materials. As can be seen by the people in the field, the invention undoubtedly opens up a novel treatment mode of methylene blue in wastewater.
Although the conversion rate of sugar is remarkably improved in CN 103555774B, the method makes an important contribution to the bioethanol industry. However, in practical application, some waste gas is inevitably generated, which causes pollution to some extent. Therefore, the significance of the present invention is also to solve the problem of recycling of the exhaust gas in CN 103555774B.
At present, the inventor of the invention still tests the gas components in the gas components and explores the pollutant removal mechanism in the gas components, and simultaneously carries out corresponding scale application improvement.
The weight volume ratio of the jerusalem artichoke cores to the methylene blue waste liquid is 1: 0.5-2. Unless otherwise specified, the weight-to-volume ratio referred to in the present invention is g/mL, or kg/L.
As a preferable scheme of the invention, the weight volume ratio of the jerusalem artichoke cores to the methylene blue waste liquid is 8:7.5
In a preferred embodiment of the present invention, the mass fraction of the concentrated phosphoric acid is 65.0% and the mass fraction of the hydrogen peroxide is 7.0%.
In a preferred embodiment of the present invention, the degradation reaction is carried out at a reaction temperature of 50 to 80 ℃.
In a preferred embodiment of the present invention, the degradation reaction is carried out at a reaction temperature of 50 ℃. Since the removal rate of contaminants is already excellent at 50 ℃, it is economical to perform the contaminant removal treatment at this temperature from the viewpoint of saving the reaction cost.
The degradation reaction is carried out synchronously with the pretreatment, and the waste gas generated by the pretreatment is synchronously introduced into the closed container for the degradation reaction, namely the pretreatment time is the degradation reaction time.
Generally speaking, when the jerusalem artichoke core is pretreated, the pretreatment reaction time is 1-5 h.
As a preferable scheme of the invention, when the jerusalem artichoke core is pretreated, the time of the pretreatment reaction is 4 hours.
The invention has the beneficial effects that:
the method has excellent removal effect on common methylene blue, avoids the defect that the existing solid-based and liquid-based treatment technologies need special modification treatment on raw materials, truly realizes the technical purpose of directly treating waste by waste, and realizes the organic combination of two industries of bioethanol preparation and wastewater treatment.
Detailed Description
The present invention is described in detail below by way of examples, and it should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention.
Example 1
Pulverizing Jerusalem artichoke core, and sieving with 40 mesh sieve to obtain Jerusalem artichoke core powder; putting 8g of jerusalem artichoke core powder into a reaction kettle, adding 80g of mixed solution of phosphoric acid and hydrogen peroxide into the reaction kettle according to the solid-to-liquid ratio of 1:10, wherein the mass fraction of concentrated phosphoric acid is 65.0%, the mass fraction of hydrogen peroxide is 7.0%, the pretreatment temperature is 50 ℃, and the pretreatment time is 4 hours; collecting gas generated during pretreatment; and the obtained gas is synchronously introduced into a closed container (50ml specification) filled with 7.5ml of methylene blue waste liquid (100ppm) to carry out degradation reaction at 50 ℃.
The removal rate of methylene blue was measured based on the change in the reaction concentration before and after the reaction, and the removal rate was 100%.
Example 2
The mass fraction of concentrated phosphoric acid was adjusted to 70.0%, the mass fraction of hydrogen peroxide was adjusted to 5.0%, and the rest was kept the same as in example 1. The removal rate of methylene blue still reaches more than 99 percent.
Example 3
The weight of the Jerusalem artichoke core powder was adjusted to 10g, and the volume of the methylene blue waste liquid was adjusted to 5ml, and the rest was kept the same as example 1. The removal rate of methylene blue still reaches more than 99 percent.
Example 4
The weight of the Jerusalem artichoke core powder was adjusted to 4g, and the volume of the methylene blue waste liquid was adjusted to 8ml, and the rest was kept the same as example 1. The removal rate of methylene blue still reaches more than 99 percent.
Claims (10)
1. The method for efficiently removing methylene blue by utilizing waste gas generated by jerusalem artichoke core pretreatment is characterized by comprising the following steps:
collecting waste gas generated by the jerusalem artichoke core pretreatment, introducing the waste gas into a closed container filled with methylene blue waste liquid, and performing degradation reaction at the temperature of 30-80 ℃;
the method for pretreating the jerusalem artichoke core comprises the following steps:
placing the jerusalem artichoke cores into a reaction kettle, and adding a concentrated phosphoric acid-hydrogen peroxide mixed reagent for a pretreatment reaction, wherein the mass fraction of the concentrated phosphoric acid is 60.0-70.0%, and the mass fraction of the hydrogen peroxide is 5.0-8.0%.
2. The method according to claim 1, wherein the weight volume ratio of the jerusalem artichoke core to the methylene blue waste liquid is 1: 0.5-2.
3. The method according to claim 2, wherein the weight volume ratio of the jerusalem artichoke core to the methylene blue waste liquid is 8: 7.5.
4. The method of claim 1, wherein the mass fraction of concentrated phosphoric acid is 65.0% and the mass fraction of hydrogen peroxide is 7.0%.
5. The method according to claim 1, wherein the degradation reaction is carried out at a reaction temperature of 50 to 80 ℃.
6. The method according to claim 5, wherein the degradation reaction is carried out at a reaction temperature of 50 ℃.
7. The method according to any one of claims 1 to 6, wherein the degradation reaction is performed synchronously with the pretreatment, and the waste gas generated by the pretreatment is synchronously introduced into the closed container for the degradation reaction.
8. The method according to claim 1, wherein the pretreatment reaction time is 1-5 h when the jerusalem artichoke core is pretreated.
9. The method according to claim 8, wherein the pretreatment of the jerusalem artichoke cores is carried out for a period of 4 hours.
10. The method of claim 1, wherein the methylene blue is present at a concentration of at least 100 ppm.
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| CN201810096865.0A CN108298661B (en) | 2018-01-31 | 2018-01-31 | Method for efficiently removing methylene blue by utilizing waste gas generated by jerusalem artichoke core pretreatment |
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| CN201810096865.0A CN108298661B (en) | 2018-01-31 | 2018-01-31 | Method for efficiently removing methylene blue by utilizing waste gas generated by jerusalem artichoke core pretreatment |
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| CN108298661B true CN108298661B (en) | 2020-05-26 |
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| CN103508545A (en) * | 2013-09-10 | 2014-01-15 | 辽宁师范大学 | Method for degrading methylene blue with hydrogen peroxide under catalysis of graphene/MnO2 nano-composite |
| CN104276650B (en) * | 2014-10-30 | 2019-03-26 | 湖北科技学院 | A kind of method of degradation of methylene blue |
| CN104923161B (en) * | 2015-07-09 | 2017-11-28 | 山东大学 | A kind of preparation method and applications of magnetic oxygenated graphene |
| CN107335402A (en) * | 2016-11-21 | 2017-11-10 | 德宏师范高等专科学校 | A kind of method of effectively absorption methylene blue in waste |
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