CN115385442B - Composite functional micro-nanofiber carrier and preparation method and application thereof - Google Patents
Composite functional micro-nanofiber carrier and preparation method and application thereof Download PDFInfo
- Publication number
- CN115385442B CN115385442B CN202210575113.9A CN202210575113A CN115385442B CN 115385442 B CN115385442 B CN 115385442B CN 202210575113 A CN202210575113 A CN 202210575113A CN 115385442 B CN115385442 B CN 115385442B
- Authority
- CN
- China
- Prior art keywords
- composite functional
- functional micro
- spinning solution
- carrier
- micro
- 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.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
- C02F3/108—Immobilising gels, polymers or the like
-
- 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
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
- Y02W10/10—Biological treatment of water, waste water, or sewage
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Hydrology & Water Resources (AREA)
- General Chemical & Material Sciences (AREA)
- Biodiversity & Conservation Biology (AREA)
- Microbiology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Immobilizing And Processing Of Enzymes And Microorganisms (AREA)
- Biological Treatment Of Waste Water (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention belongs to the technical field of sewage treatment, and particularly relates to a composite functional micro-nano fiber carrier and a preparation method and application thereof, wherein the preparation method comprises the following steps: adding polyacrylonitrile into N, N-dimethylformamide, sealing and stirring until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 8-15% by weight, and adding a quinone mediator for uniform mixing to obtain spinning solution a; preparing an organic solvent from N, N-dimethylformamide and chloroform according to the proportion of 2:8 (v/v), adding polycaprolactone into the organic solvent, and hermetically stirring until the polycaprolactone is completely dissolved, wherein the content of the polycaprolactone is 8-15% wt, so as to obtain spinning solution b; and (3) synchronously carrying out electrostatic spinning on the spinning solution a and the spinning solution b by using an electrostatic spinning device to respectively prepare quinone-based fibers and slow-release carbon source fibers, and forming a composite functional micro-nano fiber carrier with a three-dimensional network structure by crossing the two fibers. The prepared composite functional micro-nano fiber carrier provides an attachment point, a carbon source and a redox mediator for microorganisms for sewage treatment.
Description
Technical Field
The invention belongs to the technical field of sewage treatment, and particularly relates to a composite functional micro-nano fiber carrier, and a preparation method and application thereof.
Background
With the rapid development of modern industry, nitrogen-containing compounds in urban sewage can cause serious harm to surface water and underground water, so that water eutrophication is caused, and the biological health is threatened. The biological membrane method is a biological denitrification process with wide application, and the carrier is used for colonizing microorganisms, so that the microorganisms can convert nitrogen-containing compounds in the water body into nitrogen for removal, and the method has economical efficiency and environmental friendliness.
Existing biological carriers have the following several types: minerals (volcanic rock, quartz sand, etc.), the microorganism of the carrier has slow adhesion speed and small adhesion quantity; soft fibers (modified polypropylene fibers, polypropylene yarns, etc.), the carrier materials usually have a sufficient film-forming amount, but lack of functional design, and are easy to cause blocking phenomenon in the use process; plastic carriers (polyvinylidene fluoride structured packing, polytetrafluoroethylene packing, polypropylene and the like), the packing is usually small in film forming rate and film forming amount, and biofilm falling off is easy to occur due to insufficient adhesion of microorganism adhesion. Therefore, the existing biological carrier is difficult to meet the biological carrier requirement of sewage treatment with low carbon nitrogen ratio, and additional carbon source and quinone mediator are often needed to be supplemented to solve the problems of low denitrification efficiency, small biological adhesion amount and the like. However, the additional carbon source and quinone mediator are easy to run off with the effluent, causing secondary pollution, increasing cost and other problems. In order to improve the denitrification effect of microorganisms in low carbon nitrogen ratio wastewater, the prior related researches also carry out functional biological carrier design, but the researches are mostly single functional design, and the preparation raw materials are various, the process is complex, the economy is low, and the method has certain limitation in practical engineering application.
Disclosure of Invention
The invention aims at: aiming at the defects of the prior art, a composite functional micro-nano fiber carrier, a preparation method and application thereof are provided, and the prepared composite functional micro-nano fiber carrier provides attachment points, carbon sources and redox mediators for microorganisms for sewage treatment.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
in a first aspect, a method for preparing a composite functional micro-nanofiber carrier includes the steps of:
adding polyacrylonitrile into N, N-dimethylformamide, sealing and stirring until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 8-15% by weight, and adding a quinone mediator for uniform mixing to obtain spinning solution a;
preparing an organic solvent from N, N-dimethylformamide and chloroform according to the proportion of 2:8 (v/v), adding polycaprolactone into the organic solvent, and hermetically stirring until the polycaprolactone is completely dissolved, wherein the content of the polycaprolactone is 8-15% wt, so as to obtain spinning solution b;
and (3) synchronously and electrostatically spinning the spinning solution a and the spinning solution b by using an electrostatic spinning device to respectively prepare a quinone-based fiber and a slow-release carbon source fiber, wherein the quinone-based fiber and the slow-release carbon source fiber are crossed to form a composite functional micro-nano fiber carrier with a three-dimensional network structure.
Preferably, the quinone mediator comprises one of lausone and fulvic acid.
Preferably, the concentration of the lausogone in the spinning solution a is 0.1-5mg/ml, and the concentration of the fulvic acid in the spinning solution a is 0.1-5mg/ml.
Preferably, the electrostatic spinning device comprises a push injection device and a receiver, a certain distance is arranged between the push injection device and the receiver, the push injection device is respectively connected with the anode and the cathode of a power supply, the push injection device comprises two syringes with spinning needles, spinning solution a and spinning solution b respectively contained in the two syringes are sprayed to the receiver through the spinning needles, and the receiver is axially rotated to obtain the composite functional micro-nano fiber carrier.
Preferably, the voltage of the electrostatic spinning device is 15kv, the receiving distance between the pushing device and the receiver is 10cm, and the inner diameter of the spinning needle is 0.9mm.
In a second aspect, a composite functional micro-nanofiber carrier is prepared by the preparation method described in the first aspect, and comprises quinone-based fibers and slow-release carbon source fibers which are intersected with the quinone-based fibers to form a three-dimensional network structure.
Preferably, the composite functional micro-nanofiber carrier is of a membranous structure.
Preferably, the specific surface area of the composite functional micro-nano fiber carrier is more than 10m2/g, and the porosity is more than 90%.
In a second aspect, the application of the composite functional micro-nano fiber carrier applies the composite functional micro-nano fiber carrier in the field of sewage denitrification.
The invention has at least the following beneficial effects: according to the preparation method of the composite functional micro-nano fiber carrier, the electrostatic spinning device is used for respectively carrying out electrostatic spinning on the spinning solution a and the spinning solution b, so that the sprayed spinning solution a and the spinning solution b form a filiform fiber, wherein the quinone-based fiber and the slow-release carbon source fiber are crossed to form a three-dimensional network structure, the prepared carrier has a double-channel crossed three-dimensional network structure, the specific surface area and the porosity are higher, the pore channel communication performance is better, the adhesion growth and the various phases of microorganisms are facilitated, higher biological adhesion quantity can be realized, the filiform fiber is the quinone-based fiber and the slow-release carbon source fiber, the slow-release carbon source is more easily fully utilized by denitrifying bacteria under the reinforcement of a quinone mediator, the sewage deep denitrification process is simplified, the denitrification efficiency is improved, the quinone mediator and the carbon source are respectively fixed in the quinone-based fiber and the slow-release carbon source fiber, the biological metabolism is promoted along with the water outlet loss, and the problems of secondary pollution, the increase of the cost and the like caused by directly adding the quinone mediator or the carbon source are avoided. In the preparation method, polyacrylonitrile is an inert organic polymer which is not biodegradable, has the advantages of weather resistance, acid resistance and oxidant resistance, and can keep mechanical strength and stable material morphology when microorganisms are immobilized. The preparation method can realize continuous preparation of the micro-nano fiber by only dissolving a small amount of raw materials in an organic solvent, and has the advantages of simple and feasible preparation process, high automation degree and lower cost.
Drawings
Features, advantages, and technical effects of exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
Fig. 1 is a schematic flow chart of a composite functional micro-nanofiber carrier according to an embodiment of the invention.
Fig. 2 is a schematic structural view of an embodiment of an electrostatic filament-imitating apparatus according to an embodiment of the present invention.
FIG. 3 is a schematic view of a denitrification process of a complex functional micro-nanofiber carrier immobilized with denitrifying bacteria according to an embodiment of the present invention.
Wherein reference numerals are as follows:
1-a bolus device; 11-a syringe; 12-spinning needle head; 2-receiver.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, are within the scope of the present application based on the embodiments herein.
As shown in fig. 1 to 3, the invention provides a preparation method of a composite functional micro-nanofiber carrier, which comprises the following steps:
adding polyacrylonitrile into N, N-dimethylformamide, sealing and stirring until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 8-15% by weight, and adding a quinone mediator for uniform mixing to obtain spinning solution a;
preparing an organic solvent from N, N-dimethylformamide and chloroform according to the proportion of 2:8 (v/v), adding polycaprolactone into the organic solvent, and hermetically stirring until the polycaprolactone is completely dissolved, wherein the content of the polycaprolactone is 8-15% wt, so as to obtain spinning solution b;
and (3) synchronously and electrostatically spinning the spinning solution a and the spinning solution b by using an electrostatic spinning device to respectively prepare the quinone-based fiber and the slow-release carbon source fiber, wherein the quinone-based fiber and the slow-release carbon source fiber are crossed to form the composite functional micro-nano fiber carrier with a three-dimensional network structure.
According to the preparation method of the composite functional micro-nano fiber carrier, the electrostatic spinning device is used for respectively carrying out electrostatic spinning on the spinning solution a and the spinning solution b, so that the sprayed spinning solution a and the spinning solution b form a filiform fiber, wherein the quinone-based fiber and the slow-release carbon source fiber are crossed to form a three-dimensional network structure, the prepared carrier has a double-channel crossed three-dimensional network structure, the specific surface area and the porosity are higher, the pore channel communication performance is better, the adhesion growth and the various phases of microorganisms are facilitated, higher biological adhesion quantity can be realized, the filiform fiber is the quinone-based fiber and the slow-release carbon source fiber, the slow-release carbon source is more easily fully utilized by denitrifying bacteria under the reinforcement of a quinone mediator, the sewage deep denitrification process is simplified, the denitrification efficiency is improved, the quinone mediator and the carbon source are respectively fixed in the quinone-based fiber and the slow-release carbon source fiber, the biological metabolism is promoted along with the water outlet loss, and the problems of secondary pollution, the increase of the cost and the like caused by directly adding the quinone mediator or the carbon source are avoided. In the preparation method, polyacrylonitrile is an inert organic polymer which is not biodegradable, has the advantages of weather resistance, acid resistance and oxidant resistance, and can keep mechanical strength and stable material morphology when microorganisms are immobilized. The preparation method can realize continuous preparation of the micro-nano fiber by only dissolving a small amount of raw materials in an organic solvent, and has the advantages of simple and feasible preparation process, high automation degree and lower cost.
Preferably, the quinone mediator comprises one of lausone and fulvic acid.
Preferably, the concentration of the lausone in the spinning solution a is 0.1-5mg/ml, and the concentration of the fulvic acid spinning solution a is 0.1-5mg/ml.
Preferably, the electrostatic spinning device comprises a push injection device 1 and a receiver 2, a certain distance is arranged between the push injection device 1 and the receiver 2, the push injection device 1 is respectively connected with the anode and the cathode of a power supply, the push injection device 1 comprises two syringes 11 with spinning needles 12, spinning solution a and spinning solution b respectively contained in the two syringes 11 are sprayed to the receiver 2 through the spinning needles 12, and the receiver 2 is axially rotated to obtain the composite functional micro-nano fiber carrier.
The electrostatic spinning is a novel process for preparing the micro-nano fiber, and the prepared fiber has high porosity, large specific surface area and good fixing performance on microorganisms. The main components of the electrospinning device include a high-voltage power source, a bolus device 1, and a receiver 2 (drum). The electrospinning process involves electrohydrodynamic extrusion of a spinning polymer solution from a spinning needle 12 at a constant rate, creating hanging drops due to surface tension, where under the action of an electric field, positive and negative charges will separate within the liquid, electrostatic repulsion between surface charges of the same sign causes the drop to elongate into a cone, known as a "taylor cone", and then eject a fine charged jet. The jet will initially extend in a straight line and then be stretched continuously by a sharp wave bend, and when stretched into a jet of finer diameter, the solvent will evaporate rapidly and the polymer will solidify rapidly, causing the solid fibres to deposit on the grounded receptacle 2. Most organic polymers can be directly used for electrospinning as long as they can be dissolved in a suitable solvent to obtain a solution without decomposition.
Preferably, the voltage of the electrospinning device is 15kv, the receiving distance between the injection device 1 and the receiver 2 is 10cm, and the inner diameter of the spinning needle 12 is 0.9mm.
The invention also discloses a composite functional micro-nano fiber carrier which is prepared by the preparation method and comprises quinone-based fibers and slow-release carbon source fibers which are intersected with the quinone-based fibers to form a three-dimensional network structure.
The quinone-based fiber and the slow-release carbon source fiber in the composite functional micro-nano fiber carrier are crossed to form a three-dimensional network structure, the prepared carrier has a double-channel crossed three-dimensional network structure, the specific surface area and the porosity are high, the pore canal communication performance is good, the adhesion growth and the various phases of matters are facilitated, the higher biological adhesion quantity can be realized, and the filiform fiber is the quinone-based fiber and the slow-release carbon source fiber, so that the slow-release carbon source is more easily and fully utilized by denitrification flora under the reinforcement of a quinone mediator, the deep denitrification process of sewage is simplified, the denitrification efficiency is improved, and the quinone mediator and the carbon source are respectively fixed in the quinone-based fiber and the slow-release carbon source fiber and cannot be lost along with water outlet, so that the biological metabolism is promoted by continuous action, and the problems of water outlet loss, secondary pollution, cost increase and the like caused by directly adding the quinone mediator or the carbon source are avoided.
Preferably, the composite functional micro-nanofiber carrier is of a membranous structure.
Preferably, the specific surface area of the composite functional micro-nano fiber carrier is more than 10m 2 /g, and a porosity of greater than 90%.
The invention also discloses application of the composite functional micro-nano fiber carrier, and the composite functional micro-nano fiber carrier is applied to the field of sewage denitrification. Can lead the microorganism to better denitrify the sewage.
The following examples illustrate the invention in further detail, but are not intended to limit the same.
Example 1
The preparation of the composite functional micro-nanofiber carrier comprises the following steps:
dissolving polyacrylonitrile in N, N-dimethylformamide, sealing and stirring until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 12% by weight, and adding the lawsonia ketone into the mixture at the addition concentration of 1mg/ml to uniformly mix the mixture to obtain spinning solution a; mixing N, N-dimethylformamide/chloroform according to the proportion of 2:8 (v/v) to obtain an organic solvent, dissolving polycaprolactone in the organic solvent, and hermetically stirring until the polycaprolactone is completely dissolved, so that the content of the polycaprolactone is 12% wt, and obtaining spinning solution b. And then respectively taking 4mL of spinning solution a and spinning solution b, respectively placing the spinning solution a and the spinning solution b in two 5mL injectors 11, squeezing air, and spraying the spinning solution a and the spinning solution b to an axially rotating receiver 2 through a spinning needle 12 for electrostatic spinning for 2.5 hours to prepare the composite functional micro-nano fiber carrier with the specific surface area of more than 10m2/g and the porosity of more than 90 percent. Parameters of the electrostatic spinning device are set as follows: the voltage was 15kv, the receiving distance was 10cm, and the inside diameter of the spinning needle 12 was 0.9mm.
The application of the composite functional electrospun micro-nanofiber comprises the following steps: the denitrifying bacteria group screened from garbage leachate is inoculated into a culture medium, the composite functional micro-nano fiber carrier is added for microorganism fixation culture for 48 hours, and then the composite functional micro-nano fiber carrier fixed with the denitrifying bacteria group is taken out, and the denitrifying bacteria group can be attenuated in a growth period but is not fully fixed, so that the composite functional micro-nano fiber carrier is placed in a new culture medium for fixation culture, and the process is circulated for three times to complete the fixation culture of the denitrifying bacteria group. The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 8 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 8 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 8 hours.
Example 2
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then fulvic acid was added at an addition concentration of 1mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 3
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 0.1mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 4
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 0.5mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 5
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 0.8mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 6
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 1.2mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 7
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 1.5mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 8
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 2.0mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 9
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 2.5mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 10
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 3.0mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 11
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 3.5mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 12
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 4.0mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 13
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 4.5mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 14
Unlike example 1, in this example, polyacrylonitrile was dissolved in N, N-dimethylformamide, stirred in a closed state until the polyacrylonitrile was completely dissolved, wherein the content of polyacrylonitrile was 12% by weight, and then lasosone was added at an addition concentration of 5.0mg/ml and mixed uniformly to obtain a dope a. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 15
In the present example, unlike example 1, polycaprolactone was dissolved in N, N-dimethylformamide/chloroform (2:8 v/v), and the mixture was stirred in a sealed state until the polycaprolactone was completely dissolved, thereby obtaining a spinning solution b having a polycaprolactone content of 8% by weight. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 16
In the present example, unlike example 1, polycaprolactone was dissolved in N, N-dimethylformamide/chloroform (2:8 v/v), and the mixture was stirred in a sealed state until the polycaprolactone content was 15% by weight, to obtain a spinning solution b. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 17
In the present example, unlike example 1, polycaprolactone was dissolved in N, N-dimethylformamide/chloroform (2:8 v/v), and the mixture was stirred in a closed state until the polycaprolactone was completely dissolved, so that the content of polycaprolactone was 10% by weight, to obtain a spinning solution b. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Example 18
In the present example, unlike example 1, polycaprolactone was dissolved in N, N-dimethylformamide/chloroform (2:8 v/v), and the mixture was stirred in a closed state until the polycaprolactone was completely dissolved, thereby obtaining a spinning solution b having a polycaprolactone content of 13% by weight. The remaining steps were the same as in example 1.
The composite functional micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, and the removal rate of the nitrate nitrogen can be more than 90% after 6 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 6 hours, and repeating the denitrification treatment process in the simulated sewage for a plurality of times, so that the batch type circulating treatment of the simulated sewage can be realized, and the nitrate nitrogen removal rate can be stabilized to be more than 90% after 6 hours.
Comparative example 1
The preparation of the micro-nanofiber carrier comprises the following steps: dissolving polyacrylonitrile in N, N-dimethylformamide, and stirring in a closed manner until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 12% by weight, so as to obtain spinning solution a; polycaprolactone was dissolved in N, N-dimethylformamide/chloroform (2:8 v/v) to give a polycaprolactone content of 12% by weight to give a spinning solution b. And then respectively taking 4mL of spinning solution a and spinning solution b, respectively placing the spinning solution a and the spinning solution b in two 5mL syringes 11, squeezing air, and spraying the spinning solution a and the spinning solution b to an axially rotating receiver 2 through a spinning needle 12 for electrostatic spinning for 2.5 hours to prepare the composite functional micro-nano fiber carrier. Parameters of the electrostatic spinning device are set as follows: the voltage was 15kv, the receiving distance was 10cm, and the inside diameter of the spinning needle 12 was 0.9mm.
The application of the micro-nanofiber carrier comprises the following steps: inoculating the denitrifying bacteria group screened from the garbage leachate into a culture medium, adding the micro-nano fiber carrier into the culture medium, performing microorganism fixation culture for 48 hours, then taking out the micro-nano fiber carrier, placing the micro-nano fiber carrier into a new culture medium for fixation culture, and performing three cycles of the process to complete fixation culture of the denitrifying bacteria group. The micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, the removal rate of the nitrate nitrogen can be 65% after 6 hours, and the removal rate of the nitrate nitrogen can be more than 90% after 12 hours.
Comparative example 2
Unlike comparative example 1, in this comparative example, when denitrification treatment was performed by placing a micro-nanofiber carrier having a denitrifying bacteria group immobilized thereon in a simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5, 4mg of lausosone was also added to the sewage.
The removal rate of nitrate nitrogen can be over 90% after the sewage is treated for 10 hours. Then replacing the simulated sewage, putting the composite functional micro-nano fiber carrier for sewage treatment for the first time into the sewage again, still realizing the nitrate nitrogen removal rate of more than 90% after 10 hours, repeating the denitrification treatment process in the simulated sewage for a plurality of times, wherein the nitrate nitrogen removal rate can be realized to be more than 90%, but the nitrate nitrogen removal rate is required to be 12 hours.
Comparative example 3
The preparation of the micro-nanofiber carrier comprises the following steps: and (3) dissolving polyacrylonitrile in N, N-dimethylformamide, sealing and stirring until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 12% by weight, and adding the lawsonone into the solution at an adding concentration of 1mg/ml, and uniformly mixing to obtain spinning solution a. And then a proper amount of spinning solution a is placed in a 5mL injector 11, air is squeezed out, and the spinning solution a is sprayed to an axially rotating receiver 2 through a spinning needle 12 for electrostatic spinning for 2.5 hours, so that the composite functional micro-nano fiber carrier is prepared. Parameters of the electrostatic spinning device are set as follows: the voltage was 15kv, the receiving distance was 10cm, and the inside diameter of the spinning needle 12 was 0.9mm.
The application of the micro-nanofiber carrier comprises the following steps: inoculating the denitrifying bacteria group screened from the garbage leachate into a culture medium, adding the composite functional electrospun micro-nano fiber, performing microorganism fixation culture for 48 hours, then taking out the micro-nano fiber carrier fixed with the denitrifying bacteria group, placing the micro-nano fiber carrier in a new culture medium for fixation culture, and performing cycle for three times to complete fixation culture of the denitrifying bacteria group. The micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, the removal rate of the nitrate nitrogen of 32% can be realized after 2 hours, and then the concentration of the nitrate nitrogen is kept stable. Then the simulated sewage is replaced with new sewage, the process is repeated for a plurality of times, and the nitrate nitrogen removal rate is stabilized at 32% after 2 hours.
Comparative example 4
Unlike comparative example 1, in this comparative example, when denitrification treatment was performed by placing a micro-nanofiber carrier having a denitrifying bacteria group immobilized thereon in a simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5, 4mg of polycaprolactone was also added to the sewage.
The nitrate nitrogen removal rate of the sewage after 5.7 hours can be 65%, and the nitrate nitrogen removal rate after 12 hours can be more than 90%. The process of denitrification treatment in the simulated sewage is repeated for a plurality of times, the nitrate nitrogen removal rate is reduced and the time is increased each time, and the nitrate nitrogen removal rate is stabilized at 32% after 2 hours of sewage denitrification for the last several times.
Comparative example 5
The preparation of the micro-nanofiber carrier comprises the following steps: and dissolving polyacrylonitrile in N, N-dimethylformamide, and stirring in a closed manner until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 12% by weight, so as to obtain spinning solution a. And then a proper amount of spinning solution a is taken and placed in a 5mL injector 11, air is squeezed out for electrostatic spinning for 2.5 hours, and the micro-nano fiber carrier is prepared. Parameters of the electrostatic spinning device are set as follows: the voltage was 15kv, the receiving distance was 10cm, and the inside diameter of the spinning needle 12 was 0.9mm.
The application of the micro-nanofiber carrier comprises the following steps: inoculating the denitrifying bacteria group screened from the garbage leachate into a culture medium, adding the micro-nanofiber carrier, performing microorganism fixation culture for 48 hours, then taking out the micro-nanofiber carrier fixed with the denitrifying bacteria group, placing the micro-nanofiber carrier in a new culture medium for fixation culture, and performing cycle of the process for three times to complete fixation culture of the denitrifying bacteria group. The micro-nano fiber carrier fixed with the denitrification flora is placed in simulated sewage containing 200mg/L of nitrate nitrogen with COD/N=1.5 for denitrification treatment, the nitrate nitrogen concentration in the sewage is stable after 4 hours, and the nitrate nitrogen removal rate is less than 25%. Then the simulated sewage is replaced with new sewage, the process is repeated for a plurality of times, and the nitrate nitrogen removal rate is less than 25% after 4 hours.
From the above examples 1 to 18, it is apparent that the composite functional micro-nanofiber carrier prepared by the preparation method of the present invention can perform denitrification on sewage well, and the removal rate of nitrate nitrogen reaches more than 90%.
In the above comparative examples 1 to 5, the micro-nanofiber carriers prepared in comparative examples 1 and 2 had a carbon source slow release function, and the micro-nanofiber carriers prepared in comparative examples 3 and 4 had a quinone mediator, whereas the micro-nanofiber carrier prepared in comparative example 5 had only a function as a microorganism attachment point.
As is clear from a comparison between example 1 and comparative example 1, the micro-nanofiber carrier having the denitrifying bacteria immobilized thereon of both example 1 and comparative example 1 can achieve a nitrate nitrogen removal rate of 90% or more in wastewater. However, compared with a micro-nano fiber carrier with only a carbon source slow release function, the embodiment can remove nitrate nitrogen in sewage more rapidly.
As is apparent from comparison of example 1 with comparative example 2, since comparative example 2 additionally added quinone mediator while wastewater was added to the micro-nanofiber carrier, the nitrate nitrogen removal rate for wastewater in the initial several wastewater batch cycle treatments was identical to that of example 1, but since the additionally added quinone mediator in wastewater was lost with water, the nitrate nitrogen removal rate for wastewater by the micro-nanofiber carrier immobilized with denitrifying bacteria in comparative example 2 was gradually lower than that of example 1, and the removal rate of comparative example 2 was identical to that of comparative example 1 to the subsequent wastewater batch cycle treatments. It can be seen that the micro-nanofiber carrier of example 1 can be better recycled without additional replenishment of the quinone mediator to the wastewater.
As is clear from comparison of example 1 with comparative example 3, the removal rate of nitrate nitrogen in sewage by the micro-nanofiber carrier immobilized with the denitrifying bacteria of comparative example 1 is much lower than that of the micro-nanofiber carrier immobilized with the denitrifying bacteria of example 1. It can be seen that the micro-nanofiber carrier of example 1 can better promote the growth and metabolism of the denitrifying bacteria and provide energy for the denitrifying bacteria.
As is apparent from comparison of example 1 with comparative example 4, since comparative example 2 additionally added a slow-release carbon source while adding the micro-nanofiber carrier immobilized with the denitrifying bacteria, the nitrate nitrogen removal rate of wastewater in the initial several wastewater batch-type circulation treatments was identical to that of example 1, but since the slow-release carbon source additionally added in the wastewater was lost with water, the nitrate nitrogen removal rate of the micro-nanofiber carrier immobilized with the denitrifying bacteria in comparative example 4 was gradually lower than that of example 1, and the removal rate of comparative example 4 was identical to that of comparative example 3 to the subsequent wastewater batch-type circulation treatments. The micro-nanofiber carrier of the embodiment 1 can be better recycled, and the denitrifying bacteria can be better grown and metabolized without supplementing a slow-release carbon source to sewage.
As is clear from a comparison between example 1 and comparative example 5, the nitrate nitrogen removal rate of the micro-nanofiber carrier immobilized with the denitrifying bacteria of comparative example 5 is far lower than that of the micro-nanofiber carrier immobilized with the denitrifying bacteria of example 1.
Variations and modifications of the above embodiments will occur to those skilled in the art to which the invention pertains from the foregoing disclosure and teachings. Therefore, the present invention is not limited to the above-described embodiments, but is intended to be capable of modification, substitution or variation in light thereof, which will be apparent to those skilled in the art in light of the present teachings. In addition, although specific terms are used in the present specification, these terms are for convenience of description only and do not limit the present invention in any way.
Claims (6)
1. The preparation method of the composite functional micro-nanofiber carrier is characterized by comprising the following steps of:
adding polyacrylonitrile into N, N-dimethylformamide, sealing and stirring until the polyacrylonitrile is completely dissolved, wherein the content of the polyacrylonitrile is 8-15 wt%, and adding a quinone mediator for uniform mixing to obtain spinning solution a;
preparing an organic solvent from N, N-dimethylformamide and chloroform according to the proportion of 2:8 (v/v), adding polycaprolactone into the organic solvent, and hermetically stirring until the polycaprolactone is completely dissolved, wherein the content of the polycaprolactone is 8-15% by weight, so as to obtain spinning solution b;
carrying out synchronous electrostatic spinning on the spinning solution a and the spinning solution b by using an electrostatic spinning device to respectively prepare quinone-based fibers and slow-release carbon source fibers, wherein the quinone-based fibers and the slow-release carbon source fibers are crossed to form a composite functional micro-nano fiber carrier with a three-dimensional network structure;
wherein the quinone mediator comprises one of lausolone and fulvic acid;
the electrostatic spinning device comprises a push injection device and a receiver, wherein a certain distance is arranged between the push injection device and the receiver and the push injection device is respectively connected with the anode and the cathode of a power supply, the push injection device comprises two syringes with spinning needles, spinning solution a and spinning solution b respectively contained in the two syringes are sprayed to the receiver through the spinning needles, and the receiver is axially rotated to obtain the composite functional micro-nano fiber carrier;
the voltage of the electrostatic spinning device is 15kV, the receiving distance between the pushing device and the receiver is 10cm, and the inner diameter of the spinning needle is 0.9mm.
2. The method for preparing the composite functional micro-nano fiber carrier according to claim 1, wherein the concentration of the lausogone in the spinning solution a is 0.1-5mg/mL, and the concentration of the fulvic acid in the spinning solution a is 0.1-5mg/mL.
3. A composite functional micro-nanofiber carrier prepared by the preparation method of any one of claims 1 to 2, comprising quinone-based fibers and slow-release carbon source fibers crossing the quinone-based fibers to form a three-dimensional network structure.
4. The composite functional micro-nanofiber carrier according to claim 3, wherein the composite functional micro-nanofiber carrier is a membranous structure.
5. The composite functional micro-nanofiber carrier according to claim 4, wherein the specific surface area of the composite functional micro-nanofiber carrier is greater than 10m 2 /g, and a porosity of greater than 90%.
6. The application of the composite functional micro-nanofiber carrier, which is characterized in that the composite functional micro-nanofiber carrier as claimed in any one of claims 3 to 5 is applied to the sewage denitrification field.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575113.9A CN115385442B (en) | 2022-05-25 | 2022-05-25 | Composite functional micro-nanofiber carrier and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210575113.9A CN115385442B (en) | 2022-05-25 | 2022-05-25 | Composite functional micro-nanofiber carrier and preparation method and application thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115385442A CN115385442A (en) | 2022-11-25 |
| CN115385442B true CN115385442B (en) | 2023-07-04 |
Family
ID=84116706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210575113.9A Active CN115385442B (en) | 2022-05-25 | 2022-05-25 | Composite functional micro-nanofiber carrier and preparation method and application thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115385442B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116216874B (en) * | 2023-03-23 | 2024-04-30 | 重庆大学 | Water body restoration agent for controlling cyanobacteria bloom, preparation method and application |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007154335A (en) * | 2005-12-01 | 2007-06-21 | Snt Co | Water-repellent membrane, method for producing water-repellent membrane, method for forming water-repellent membrane on surface of article, and article obtained by the method |
| AU2009286218A1 (en) * | 2008-08-29 | 2010-03-04 | Solvay Sa | Electrolyte-containing polymer nanofibers produced by an electrospin process, and high efficiency dye-sensitized solar cells using same |
| CN109957852A (en) * | 2019-04-03 | 2019-07-02 | 闽江学院 | A kind of composite nano fiber electrostatic spinning process |
-
2022
- 2022-05-25 CN CN202210575113.9A patent/CN115385442B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007154335A (en) * | 2005-12-01 | 2007-06-21 | Snt Co | Water-repellent membrane, method for producing water-repellent membrane, method for forming water-repellent membrane on surface of article, and article obtained by the method |
| AU2009286218A1 (en) * | 2008-08-29 | 2010-03-04 | Solvay Sa | Electrolyte-containing polymer nanofibers produced by an electrospin process, and high efficiency dye-sensitized solar cells using same |
| CN109957852A (en) * | 2019-04-03 | 2019-07-02 | 闽江学院 | A kind of composite nano fiber electrostatic spinning process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115385442A (en) | 2022-11-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN115385442B (en) | Composite functional micro-nanofiber carrier and preparation method and application thereof | |
| CN103172174B (en) | Starting and running method of completely autotrophic ammonium removal over nitrite technology | |
| Hai et al. | Simultaneous removal of nitrogen and phosphorus from swine wastewater in a sequencing batch biofilm reactor | |
| CN108751746B (en) | Surface modification method of micron-sized inorganic basalt fiber carrier for sewage/wastewater treatment | |
| CN106277357B (en) | The starting of autotrophic denitrification system and efficient operation method that a kind of floc sludge and granule sludge coexist | |
| CN101693775B (en) | Fixed microbe rubber granule filler, preparation and application thereof | |
| CN112076785B (en) | Carbon nitride/lanthanum hydroxide nanofiber membrane and preparation method and application thereof | |
| CN102586920A (en) | Preparation method of polyacrylonitrile nanometer fibers | |
| CN102796722A (en) | Preparation method of immobilized microorganism high molecule pellet for wastewater nitrogen removal | |
| CN210117272U (en) | Bionic aquatic weed for river regulation | |
| CN105366894A (en) | Two-stage biological aerated filter and method for processing rural domestic wastewater | |
| CN111420706A (en) | Cu2O/Bi2O2CO3Preparation method and application of semiconductor heterojunction composite silk fibroin fibrous membrane | |
| CN108529739A (en) | A kind of porosity complex microorganism carrier and preparation method thereof | |
| CN109126896A (en) | It is a kind of to prepare g-C3N4With the method for carbon fiber complex carrier | |
| CN108504699B (en) | Method for promoting anaerobic fermentation of excess sludge to produce acid by utilizing APG06 | |
| CN111041603A (en) | Preparation method of fibroin/microorganism-based polymer solution and preparation method of composite nanofiber of fibroin/microorganism-based polymer solution | |
| CN113636641B (en) | Carbon-reduction sewage biological treatment method and carbon-fixation soil conditioner prepared from sludge | |
| CN112239273B (en) | Artificial activated sludge of pharmaceutical wastewater biochemical system, preparation method and application | |
| CN113121270A (en) | Organic fertilizer based on waste alcohol fermentation wastewater | |
| CN113023892B (en) | Method for rapidly realizing sludge granulation by taking chayofer as framework | |
| CN104478071A (en) | Preparation method of rare earth-attapulgite bio-catalytic sludge | |
| CN114804345B (en) | Method and system for super-enriching solid phase denitrifying bacteria based on nanofiber carbon source | |
| CN111689584A (en) | Microbial cultivation carrier assembly | |
| CN117209049A (en) | Modified flocking biological filler and preparation method and application thereof | |
| CN116621330B (en) | Biological filler for slowly releasing carbon source and preparation method and application thereof |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |