CN112010517B - Environment-friendly method for treating industrial sludge - Google Patents
Environment-friendly method for treating industrial sludge Download PDFInfo
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- CN112010517B CN112010517B CN202010942924.9A CN202010942924A CN112010517B CN 112010517 B CN112010517 B CN 112010517B CN 202010942924 A CN202010942924 A CN 202010942924A CN 112010517 B CN112010517 B CN 112010517B
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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
- C02F11/00—Treatment of sludge; Devices therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/22—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising organic material
- B01J20/24—Naturally occurring macromolecular compounds, e.g. humic acids or their derivatives
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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
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/18—Treatment of sludge; Devices therefor by thermal conditioning
-
- 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
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
-
- 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
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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
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/40—Valorisation of by-products of wastewater, sewage or sludge processing
Abstract
The invention provides an environment-friendly method for treating industrial sludge, which comprises the following steps: the method comprises the following steps: sending 1000 portions of industrial sludge into a closed tank, then adding 60-120 portions of reaction auxiliary agent, stirring for 35-45min at the rotating speed of 500r/min of 200-1500-inch-baked materials, then pressurizing at the pressure of 2-10MPa, after the reaction is finished, sending into a calcining furnace for high-temperature calcination at the temperature of 1500-1000-inch-baked materials for 35-45 min. The industrial sludge is mixed with the reaction auxiliary agent for reaction, and then is calcined at high temperature, the reaction auxiliary agent is obtained by processing bentonite by adopting pyrolyzed epoxy soybean oil, the pyrolyzed epoxy soybean oil has high temperature and can promote the expansion of a bentonite lamella, so that the industrial sludge is promoted to enter the bentonite lamella and then is further subjected to adsorption reaction with the adsorbent to form a new system structure, and a foundation is provided for the subsequent treatment of the adsorbent.
Description
Technical Field
The invention relates to the technical field of industrial sludge treatment, in particular to an environment-friendly method for treating industrial sludge.
Background
Sludge is a product of sewage treatment, and is an extremely complex heterogeneous body composed of organic debris, bacterial cells, inorganic particles and the like. The main characteristics of the sludge are high water content (up to more than 99 percent), high organic matter content, easy decomposition and stink generation, fine particles, small specific gravity and colloidal liquid state. The industrial sludge refers to sludge generated in an industrial wastewater treatment station, is solid precipitate generated in the process of water and sewage treatment, is generally rich in inorganic sludge, contains chemical components in production wastewater, and belongs to dangerous wastewater. The treatment of the industrial sludge comprises the following steps: dehydration, selective disposal, recycling, isolation and landfill, and harmless incineration.
Industrial sludge contains more heavy metal components, and the prior art mostly adopts a domestic sludge method to treat the industrial sludge, and the technology is difficult to reach the treatment degree of the industrial sludge, so that further improved treatment is needed.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide an environment-friendly method for treating industrial sludge.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the invention provides an environment-friendly method for treating industrial sludge, which comprises the following steps:
the method comprises the following steps: sending 1000 portions of industrial sludge into a closed tank, then adding 60-120 portions of reaction auxiliary agent, stirring for 35-45min at the rotating speed of 500r/min of 200-1500-;
step two: preparation of the adsorbent: adding 30-40 parts of cyclodextrin into 60-100 parts of activated carbon dispersion liquid, stirring at the rotating speed of 200-500r/min for 30-40min, then adding 1-5 parts of rare earth lanthanum chloride, and then continuously stirring at the rotating speed of 100-200r/min for 55-65min to obtain an adsorbent;
step three, blending the adsorbent obtained in the step two with the raw material obtained in the step one, sending the mixture into a steam explosion tank, then adding hot-pressing lignin, and performing steam explosion pressure relief treatment at the pressure of 2-5 MPa;
step four: placing industrial sludge in a reaction tube, then leaching by adopting water vapor of 1-3g/s, and collecting sludge after leaching;
step five: boiling the sludge in boiling water for 10-20min at 100 deg.C, centrifuging at 1000-1200r/min for 30-40min, and drying.
Preferably, the preparation method of the reaction auxiliary agent comprises the following steps: and (2) feeding the bentonite into the pyrolyzed epoxidized soybean oil, standing for 10-20min, then stirring at the rotating speed of 100-200r/min for 30-40min, finally taking out, washing with water, and then feeding into a sodium citrate solution to continue ultrasonic dispersion for 15-25min, wherein the ultrasonic power is 300-500W, so as to obtain the reaction auxiliary agent.
Preferably, the pyrolyzed epoxidized soybean oil is obtained after epoxidized soybean oil is reacted at 400-1000 ℃ for 10-20 min.
Preferably, the epoxidized soybean oil is obtained after reaction at 700 ℃ for 15 min.
Preferably, the preparation method of the activated carbon dispersion liquid comprises the following steps: adding 60-80 parts of activated carbon into a magnetization tank, then adding 5-10 parts of ionic liquid, magnetizing for 1-3min under the magnetic field strength condition of 100-200mT, and then magnetizing for 2-6min under the magnetic field strength condition of 210-230mT to obtain the activated carbon dispersion liquid.
Preferably, the ionic liquid is 1-butyl-3-methylimidazolium chloride.
Preferably, the hot-pressed lignin is lignin which is hot-pressed for 10-20min at 70-100 ℃, and the hot-pressing pressure is 2-5 MPa.
Preferably, the hot-pressed lignin is lignin which is hot-pressed for 15min at 85 ℃, and the pressure of the hot pressing is 3.5 MPa.
Preferably, the reaction tubes are transversely arranged, the transverse tubes are divided into a large tube, a middle tube and a small tube, the inner diameters of the large tube, the middle tube and the small tube are sequentially reduced, the industrial sludge is placed in the large tube, the large tube is rinsed towards the small tube in a rinsing mode, and the rinsed sludge is collected from the small tube.
Preferably, the collection in the small pipe is filtered and collected in the form of a filter screen, and the particle size of the filter screen is 1-6 meshes.
Compared with the prior art, the invention has the following beneficial effects:
the industrial sludge is mixed with the reaction auxiliary agent for reaction, and then is calcined at high temperature, the reaction auxiliary agent is obtained by processing bentonite by adopting pyrolyzed epoxy soybean oil, the pyrolyzed epoxy soybean oil has high temperature and can promote the expansion of a bentonite lamella, so that the industrial sludge is promoted to enter the bentonite lamella and then is further subjected to adsorption reaction with the adsorbent to form a new system structure, and a foundation is provided for the subsequent treatment of the adsorbent; the adsorbent is modified and mixed by cyclodextrin and active carbon dispersion liquid, the active carbon dispersion liquid is formed by blending active carbon and ionic liquid, the inorganic property of the active carbon dispersion liquid is improved, the cyclodextrin is of a cavity structure, the interior of the cyclodextrin is hydrophobic, and the exterior of the cyclodextrin is hydrophilic, so that the active carbon is adsorbed on the surface of the cyclodextrin, the active carbon is promoted to adsorb heavy metal ions and the like, meanwhile, the inner cavity structure can adsorb organic and other impurities, and the adsorption effect of the active carbon is improved; the hot-pressing lignin can form a flow state after being treated, the mixing effect between materials can be increased after blasting, and the leaching effect of the industrial sludge can be improved by the arrangement of the reaction tube, so that the cleaning of impurities is enhanced, and the purification effect of the industrial sludge is improved.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to specific embodiments, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1.
The environment-friendly method for treating industrial sludge comprises the following steps:
the method comprises the following steps: feeding 500 parts of industrial sludge into a closed tank, adding 60 parts of reaction auxiliary agent, stirring at a rotating speed of 200r/min for 35min, pressurizing at a pressure of 2MPa, feeding into a calcining furnace for high-temperature calcination at the calcining temperature of 1000 ℃ for 35min after the reaction is finished;
step two: preparation of the adsorbent: adding 30 parts of cyclodextrin into 60 parts of activated carbon dispersion liquid, stirring at the rotating speed of 200r/min for 30min, then adding 1 part of rare earth lanthanum chloride, and then continuously stirring at the rotating speed of 100r/min for 55min to obtain an adsorbent;
step three, blending the adsorbent obtained in the step two with the raw material obtained in the step one, sending the mixture into a steam explosion tank, then adding hot-pressing lignin, and performing steam explosion pressure relief treatment at the pressure of 2 MPa;
step four: placing industrial sludge in a reaction tube, then leaching by adopting water vapor of 1g/s, and collecting sludge after leaching;
step five: boiling the sludge in boiling water for 10min at 100 deg.C, centrifuging at 1000r/min for 30min, and drying.
The preparation method of the reaction promoter in this example is: and (2) feeding the bentonite into pyrolyzed epoxidized soybean oil, standing for 10min, then stirring at the rotating speed of 100r/min for 30min, finally taking out, washing with water, then feeding into a sodium citrate solution, and continuing to perform ultrasonic dispersion for 15min, wherein the ultrasonic power is 300W, so as to obtain the reaction auxiliary agent.
The pyrolyzed epoxidized soybean oil in this example was obtained by reacting epoxidized soybean oil at 400 ℃ for 10 min.
The preparation method of the activated carbon dispersion liquid of the embodiment comprises the following steps: adding 60 parts of activated carbon into a magnetization tank, then adding 5 parts of ionic liquid, magnetizing for 1min under the condition of a magnetic field strength of 100mT, and then magnetizing for 2min under the condition of a magnetic field strength of 210mT to obtain the activated carbon dispersion liquid.
The ionic liquid of this example was 1-butyl-3-methylimidazolium chloride.
The hot-pressing lignin in the embodiment is obtained by hot-pressing lignin at 70 ℃ for 10min, and the hot-pressing pressure is 2 MPa.
The reaction tubes of the embodiment are transversely arranged, the transverse tubes are divided into a large tube, a middle tube and a small tube, the inner diameters of the large tube, the middle tube and the small tube are sequentially reduced, industrial sludge is placed in the large tube, the large tube is leached towards the small tube in a leaching mode, and the leached sludge is collected from the small tube.
The collection in the small tube of this example is performed by filtration using a filter screen having a particle size of 1 to 6 mesh.
Example 2.
The environment-friendly method for treating industrial sludge comprises the following steps:
the method comprises the following steps: feeding 1000 parts of industrial sludge into a closed tank, adding 120 parts of reaction auxiliary agent, stirring at a rotating speed of 500r/min for 45min, pressurizing at a pressure of 10MPa, feeding into a calcining furnace for high-temperature calcination at 1500 ℃ after the reaction is finished, and calcining for 45 min;
step two: preparation of the adsorbent: adding 40 parts of cyclodextrin into 100 parts of activated carbon dispersion liquid, stirring at the rotating speed of 500r/min for 40min, then adding 5 parts of rare earth lanthanum chloride, and then continuously stirring at the rotating speed of 200r/min for 65min to obtain an adsorbent;
step three, blending the adsorbent obtained in the step two with the raw material obtained in the step one, sending the mixture into a steam explosion tank, then adding hot-pressing lignin, and performing steam explosion pressure relief treatment at the pressure of 5 MPa;
step four: placing industrial sludge in a reaction tube, then leaching by adopting 3g/s of water vapor, and collecting sludge after leaching;
step five: boiling the sludge in boiling water for 20min at 100 deg.C, centrifuging at 1200r/min for 40min, and drying.
The preparation method of the reaction promoter in this example is: and (2) feeding the bentonite into pyrolyzed epoxidized soybean oil, standing for 20min, then stirring at a rotating speed of 200r/min for 40min, finally taking out, washing with water, then feeding into a sodium citrate solution, and continuing to perform ultrasonic dispersion for 25min, wherein the ultrasonic power is 500W, thereby obtaining the reaction auxiliary agent.
The pyrolyzed epoxidized soybean oil in this example was obtained after reacting epoxidized soybean oil at 1000 deg.C for 20 min.
The preparation method of the activated carbon dispersion liquid of the embodiment comprises the following steps: adding 80 parts of activated carbon into a magnetization tank, then adding 10 parts of ionic liquid, magnetizing for 3min under the condition of a magnetic field strength of 200mT, and then magnetizing for 6min under the condition of a magnetic field strength of 230mT to obtain the activated carbon dispersion.
The ionic liquid of this example was 1-butyl-3-methylimidazolium chloride.
The hot-pressing lignin in the embodiment is obtained by hot-pressing lignin at 100 ℃ for 20min, and the hot-pressing pressure is 5 MPa.
The reaction tubes of the embodiment are transversely arranged, the transverse tubes are divided into a large tube, a middle tube and a small tube, the inner diameters of the large tube, the middle tube and the small tube are sequentially reduced, industrial sludge is placed in the large tube, the large tube is leached towards the small tube in a leaching mode, and the leached sludge is collected from the small tube.
The collection in the small tube of this example was performed by filtration using a filter screen having a particle size of 6 mesh.
Example 3.
The environment-friendly method for treating industrial sludge comprises the following steps:
the method comprises the following steps: feeding 750 parts of industrial sludge into a closed tank, adding 90 parts of reaction auxiliary agent, stirring at a rotating speed of 350r/min for 40min, pressurizing at a pressure of 6MPa, feeding into a calcining furnace for high-temperature calcination at 1250 ℃ after the reaction is finished, and calcining for 40 min;
step two: preparation of the adsorbent: adding 35 parts of cyclodextrin into 80 parts of activated carbon dispersion liquid, stirring at the rotating speed of 350r/min for 35min, then adding 3 parts of rare earth lanthanum chloride, and then continuously stirring at the rotating speed of 150r/min for 60min to obtain an adsorbent;
step three, blending the adsorbent obtained in the step two with the raw material obtained in the step one, sending the mixture into a steam explosion tank, then adding hot-pressing lignin, and performing steam explosion pressure relief treatment at the pressure of 3.5 MPa;
step four: placing industrial sludge in a reaction tube, then leaching by adopting water vapor of 1-3g/s, and collecting sludge after leaching;
step five: boiling the sludge in boiling water for 15min at 100 ℃, then centrifuging at the rotation speed of 1000-1200r/min for 30-40min, and then drying.
The preparation method of the reaction promoter in this example is: and (2) feeding the bentonite into pyrolyzed epoxidized soybean oil, standing for 15min, then stirring at the rotating speed of 150r/min for 35min, finally taking out, washing with water, then feeding into a sodium citrate solution, and continuing to perform ultrasonic dispersion for 20min, wherein the ultrasonic power is 400W, so as to obtain the reaction auxiliary agent.
The pyrolyzed epoxidized soybean oil of this example was obtained after reacting epoxidized soybean oil at 700 ℃ for 15 min.
The preparation method of the activated carbon dispersion liquid of this example includes: adding 70 parts of activated carbon into a magnetization tank, then adding 7.5 parts of ionic liquid, magnetizing for 1-3min under the condition of magnetic field intensity of 150mT, and then magnetizing for 4min under the condition of magnetic field intensity of 220mT to obtain the activated carbon dispersion liquid.
The ionic liquid of this example was 1-butyl-3-methylimidazolium chloride.
The hot-pressing lignin in the embodiment is obtained by hot-pressing lignin at 85 ℃ for 15min, and the hot-pressing pressure is 3.5 MPa.
The reaction tubes of the embodiment are transversely arranged, the transverse tubes are divided into a large tube, a middle tube and a small tube, the inner diameters of the large tube, the middle tube and the small tube are sequentially reduced, industrial sludge is placed in the large tube, the large tube is leached towards the small tube in a leaching mode, and the leached sludge is collected from the small tube.
The small tube inside collection of this example was collected by filtration in the form of a sieve having a particle size of 3.5 mesh.
Comparative example 1.
The materials and preparation process were substantially the same as those of example 3, except that no reaction aid was added.
Comparative example 2.
The materials and preparation process were substantially the same as those of example 3, except that the conventional treatment method was employed.
| Improvement of total heavy Metal (%) | |
| Example 1 | 150.2 |
| Example 2 | 50.7 |
| Example 3 | 51.3 |
| Comparative example 1 | 43.1 |
| Comparison ofExample 2 | 39.2 |
As can be seen from examples 1 to 3 and comparative examples 1 to 2, the improvement rate of the heavy metal Pb in example 3 of the present invention was 51.3%, and the improvement rate of the heavy metal Pb in comparative example 2 was 39.2%.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The environment-friendly method for treating industrial sludge is characterized by comprising the following steps:
the method comprises the following steps: sending 1000 portions of industrial sludge into a closed tank, then adding 60-120 portions of reaction auxiliary agent, stirring for 35-45min at the rotating speed of 500r/min of 200-1500-;
step two: preparation of the adsorbent: adding 30-40 parts of cyclodextrin into 60-100 parts of activated carbon dispersion liquid, stirring for 30-40min at the rotation speed of 200-500r/min, then adding 1-5 parts of rare earth lanthanum chloride, and then continuously stirring for 55-65min at the rotation speed of 100-200r/min to obtain an adsorbent;
step three, blending the adsorbent obtained in the step two with the raw material obtained in the step one, sending the mixture into a steam explosion tank, then adding hot-pressing lignin, and performing steam explosion pressure relief treatment at the pressure of 2-5 MPa;
step four: placing industrial sludge in a reaction tube, then leaching by adopting water vapor of 1-3g/s, and collecting sludge after leaching;
step five: boiling the sludge in boiling water for 10-20min at 100 deg.C, centrifuging at 1000-1200r/min for 30-40min, and drying.
2. The method for environment-friendly treatment of industrial sludge according to claim 1, wherein the preparation method of the reaction auxiliary agent comprises: and (2) feeding the bentonite into the pyrolyzed epoxidized soybean oil, standing for 10-20min, then stirring at the rotating speed of 100-200r/min for 30-40min, finally taking out, washing with water, and then feeding into a sodium citrate solution to continue ultrasonic dispersion for 15-25min, wherein the ultrasonic power is 300-500W, so as to obtain the reaction auxiliary agent.
3. The method as claimed in claim 2, wherein the pyrolyzed epoxidized soybean oil is obtained by reacting epoxidized soybean oil at 400-1000 ℃ for 10-20 min.
4. The environment-friendly method for treating industrial sludge as claimed in claim 3, wherein the epoxidized soybean oil is obtained after reacting at 700 ℃ for 15 min.
5. The method for environment-friendly treatment of industrial sludge according to claim 1, wherein the preparation method of the activated carbon dispersion comprises the following steps: adding 60-80 parts of activated carbon into a magnetization tank, then adding 5-10 parts of ionic liquid, magnetizing for 1-3min under the magnetic field strength condition of 100-200mT, and then magnetizing for 2-6min under the magnetic field strength condition of 210-230mT to obtain the activated carbon dispersion liquid.
6. The environment-friendly method for treating industrial sludge according to claim 5, wherein the ionic liquid is 1-butyl-3-methylimidazolium chloride.
7. The environment-friendly method for treating industrial sludge as claimed in claim 1, wherein the hot-pressed lignin is lignin which is hot-pressed at 70-100 ℃ for 10-20min, and the hot-pressing pressure is 2-5 MPa.
8. The method of claim 7, wherein the hot-pressed lignin is lignin which is hot-pressed at 85 ℃ for 15min, and the pressure of the hot-pressing is 3.5 MPa.
9. The environment-friendly industrial sludge treatment method as claimed in claim 1, wherein the reaction tubes are arranged transversely, the transverse tubes are divided into a large tube, a middle tube and a small tube, the inner diameters of the large tube, the middle tube and the small tube are sequentially reduced, the industrial sludge is placed in the large tube, the industrial sludge is leached from the large tube to the small tube, and the leached sludge is collected from the small tube.
10. The method of claim 9, wherein the collection in the small pipe is performed by filtration using a filter screen with a particle size of 1-6 mesh.
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| CN103172237A (en) * | 2013-04-15 | 2013-06-26 | 农业部沼气科学研究所 | Method for producing methane in anaerobic digestion by pretreating sludge through steam explosion |
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| JP2018518551A (en) * | 2015-04-20 | 2018-07-12 | コーネル ユニバーシティ | Porous cyclodextrin polymer material and method for producing and using the same |
| CN110124625A (en) * | 2019-05-29 | 2019-08-16 | 西南石油大学 | A kind of environment-friendly type bentonite and its preparation method and application |
| CN110523391A (en) * | 2019-09-16 | 2019-12-03 | 成都工业学院 | A kind of preparation method and application of cyclodextrin improvement biomass coffee grounds |
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