CN114538570A - Iron-carbon micro-electrolysis composite filler based on wetland plant residues and preparation method thereof - Google Patents
Iron-carbon micro-electrolysis composite filler based on wetland plant residues and preparation method thereof Download PDFInfo
- Publication number
- CN114538570A CN114538570A CN202210182290.0A CN202210182290A CN114538570A CN 114538570 A CN114538570 A CN 114538570A CN 202210182290 A CN202210182290 A CN 202210182290A CN 114538570 A CN114538570 A CN 114538570A
- Authority
- CN
- China
- Prior art keywords
- wetland plant
- plant residues
- iron
- carbon micro
- composite filler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
-
- 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Processing Of Solid Wastes (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
The invention discloses an iron-carbon micro-electrolysis composite filler based on wetland plant residues, which is prepared from a framework material, wetland plant residues and reducing iron powder through a series of processes of crushing, sieving, mixing and bonding, anaerobic high-temperature calcination and the like. By adopting the scheme, the invention overcomes the defects of the prior wetland plant residue resource treatment technology, and provides the iron-carbon micro-electrolysis composite filler based on the wetland plant residue, which has the advantages of low manufacturing cost and good treatment effect, and the filler has higher porosity, larger specific surface area, higher electron transfer rate and the like while the wetland plant residue is utilized in a resource manner, so that the sewage treatment efficiency of ecological treatment facilities such as vertical greening walls, roof greening tanks, artificial wetlands and the like can be improved, and the sewage treatment cost is reduced; simultaneously provides a method for manufacturing the iron-carbon micro-electrolysis composite filler based on the wetland plant residues.
Description
Technical Field
The invention relates to the technical field of environmental engineering solid waste recycling and water treatment, in particular to an iron-carbon micro-electrolysis composite filler based on wetland plant residues and a preparation method thereof.
Background
At present, the wetland restoration technology has become a common method for improving the quality of the global surface water environment. With the increasing of the construction area of the wetland, a large amount of wetland plant residues are generated every year. The prior art can not meet the increasing treatment and disposal of wetland plant residues, is easy to cause secondary pollution and is not beneficial to carbon emission reduction of a wetland system. How to effectively treat and dispose wetland plant residues and avoid secondary water pollution caused by in-situ stacking of the wetland plant residues becomes one of the key influencing factors for sustainable development and application of wetland restoration technologies in China and even the world. In addition, due to carbonThe lack of sources and the poor denitrification effect of ecological treatment facilities such as vertical greening walls, roof greening grooves, artificial wetlands and the like on the water body with low carbon-nitrogen ratio. Although the adding of the carbon source as the denitrification electron donor can obviously improve the denitrification efficiency, the CO content of the wetland system can be increased2、CH4The emission of greenhouse gases is not in line with the national important strategic requirements of carbon emission reduction in China. Therefore, the seeking of a lower carbon electron donor is more beneficial to the improvement of the denitrification performance of the wetland system.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides the iron-carbon micro-electrolysis composite filler based on the wetland plant residues, which has the advantages of low preparation cost and good treatment effect.
The invention discloses an iron-carbon micro-electrolysis composite filler based on wetland plant residues, which is characterized in that: the wetland treatment agent comprises a framework material, wetland plant residues, reducing iron powder and a binder, wherein the component ratio of the framework material to the wetland plant residues to the reducing iron powder is 1-10: 1-10: 1-10.
The invention further provides that: the framework material, the wetland plant residues and the reducing iron powder are mixed to form a mixed raw material, and the component ratio of the mixed raw material to the binder is 1-10: 0.1-1.
The invention further provides that: the framework material is at least one of clay, bentonite and kaolin.
The invention further comprises the following steps: the wetland plant residue is at least one of rhizoma Acori Calami, rhizoma Phragmitis and herba Typhae residue.
The invention further provides the following steps: the binder is sodium carboxymethylcellulose 3-5 per mill aqueous solution.
The invention further comprises the following steps: the reducing iron powder is waste iron powder.
The invention further provides that: the framework material, the wetland plant residues and the reducing iron powder are mixed according to the proportion of 5: 3: 2.
in conclusion, the method has the following specific beneficial effects: the filler disclosed by the invention has the advantages that the preparation cost is low, the treatment effect is good, the filler can improve the sewage treatment efficiency of ecological treatment facilities such as vertical greening walls, roof greening grooves, artificial wetlands and the like while the wetland plant residues are recycled, and the sewage treatment cost is reduced.
The invention also discloses a preparation method of the iron-carbon micro-electrolysis composite filler based on wetland plant residues, which is characterized by comprising the following steps: the method comprises the following steps:
firstly, respectively crushing the framework material and the wetland plant residues to 10-100 meshes, and then screening through a sieve with the aperture of 0.150-2.0 mm;
step two, crushing the reducing iron powder to 100-200 meshes, and then carrying out screening operation by a sieve with the aperture of 0.075-0.150 mm;
step three, mixing the framework material, the wetland plant residues and the reducing iron powder obtained in the step one and the step two according to the weight ratio of 1-10: 1-10: 1-10 to form mixed raw materials;
step four, preparing the sodium carboxymethylcellulose into 3-5 per mill of aqueous solution to form a binder;
step five, uniformly mixing the binder and the mixed raw materials according to the proportion of 0.1-1:10 to form blocks;
putting the blocky mixed raw materials into a granulator, extruding, rubbing into strips, forming balls, and naturally drying at the temperature of 5-35 ℃ to obtain raw filler balls;
and step seven, placing the dried iron-carbon micro-electrolysis composite filler raw material ball in a muffle furnace, sintering for 10-120 minutes under the anaerobic condition at the temperature of 500-1000 ℃, naturally cooling to room temperature after sintering, and sealing for storage.
The invention further provides that: in the first step, when the crushed wetland plant residue particles are too large to be sieved, the crushed wetland plant residue particles are crushed again and then are continuously sieved.
The invention further provides the following steps: and in the second step, when the crushed reducing iron powder particles are too large to be sieved, re-crushing the particles, and then continuously sieving the particles.
The method has the specific beneficial effects that the first step and the second step remove other impurities in the framework material to prevent the interference of the impurities in the preparation process of the filler, clean and dry the wetland plant residues, and then crush and sieve the framework material, the wetland plant residues and the reducing iron powder; step three, uniformly mixing the three raw materials according to a certain proportion; step four, step five and step six are after mixing the raw materials mixed evenly with sodium carboxymethyl cellulose aqueous solution prepared and taking the form of the lump, finish the preparation of the raw pellet of packing in the granulator, make the lump mixed raw materials into raw pellet, step seven is through the high-temperature calcination of anaerobism finally, make the packing have higher porosity, advantage such as greater specific surface area and higher electron transfer rate, etc., the preparation of the little electrolytic composite filler of iron carbon is simple, raw materials are apt and the treatment effect is good.
Drawings
FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The following detailed description of specific embodiments of the invention is provided in conjunction with the accompanying drawings:
example 1:
a preparation method of an iron-carbon micro-electrolysis composite filler based on wetland plant residues is characterized by comprising the following steps: the method comprises the following steps:
respectively crushing a framework material (the framework material is a soil framework material and can adopt at least one of clay, bentonite and kaolin) and wetland plant residues (the wetland plant residues are at least one of calamus, reed and cattail residues) to 10 meshes, and then screening by using a screen with the aperture of 2.0 mm;
step two, crushing the reducing iron powder to 200 meshes, and then screening by using a sieve with the aperture of 0.075 mm;
step three, mixing the framework material, the wetland plant residues and the reducing iron powder obtained in the step one and the step two according to the proportion of 1: 1:1 to form mixed raw materials;
step four, preparing the sodium carboxymethylcellulose into 5 per mill of aqueous solution to form a binder;
step five, uniformly mixing the binder and the mixed raw materials according to the proportion of 0.5:10 to form blocks;
putting the blocky mixed raw materials into a granulator, extruding, rubbing into strips, forming balls, and naturally drying at 25 ℃ to obtain raw filler balls;
and step seven, placing the dried iron-carbon micro-electrolysis composite filler raw material ball into a muffle furnace, sintering for 30 minutes under the anaerobic condition at 850 ℃, naturally cooling to room temperature after sintering, and sealing and storing.
The invention further provides that: in the first step, when the crushed wetland plant residue particles are too large to be sieved, the crushed wetland plant residue particles are crushed again and then are continuously sieved.
The invention further provides that: and in the second step, when the crushed reducing iron powder particles are too large to be sieved, re-crushing the particles, and then continuously sieving the particles.
Example 2:
the raw materials and the specific steps of the method for preparing the iron-carbon microelectrolysis composite filler based on the wetland plant residues are the same as those in the example 1, and the differences are only that in the third step, the skeleton material, the wetland plant residues and the reducing iron powder are prepared according to the proportion of 2: 2: 1 to form mixed raw materials.
Example 3:
the raw materials and the specific steps of the method are the same as those of example 1, and the differences are only that in the third step, the skeleton material, the wetland plant residues and the reducing iron powder are mixed according to the ratio of 3: 2: 1 to form mixed raw materials.
Example 4:
the raw materials and the specific steps of the method are the same as those of example 1, and the differences are only that in the third step, the framework material, the wetland plant residues and the reducing iron powder are mixed according to the ratio of 5: 3: 2 to form mixed raw materials.
Example 5:
the raw materials and the specific steps of the method are the same as those of example 1, and the difference is that the skeleton material, the wetland plant residues and the reducing iron powder in the third step are mixed according to the ratio of 6: 3: 2 to form mixed raw materials.
In order to detect the sewage treatment effect of the iron-carbon micro-electrolysis composite filler as the substrate of the ecological treatment facility, the spherical iron-carbon micro-electrolysis composite filler prepared in the embodiment of the invention is added into a designed artificial wetland simulator, and the spherical filler and local soil are mixed according to the volume ratio of 1:2, uniformly mixing, filling the mixture serving as a mixed matrix in a simulation device, wherein the filling height is controlled to be 15cm, and the water depth is controlled to be 10 cm. Planting rhizoma Acori Calami in mixed matrix of simulation device at a planting density of 70 plants/m2. The water inlet adopts the manually prepared inferior five types of water, the water inlet and the water outlet are carried out in a manual water changing mode, and the water changing rate is 100 percent. In the stage, the filler is added into the system at the initial stage of the experiment, the filler is not replaced at the later stage, and the durability of the filler strengthening effect is judged according to the change of the denitrification efficiency of the experimental group along with the time. And after the artificial wetland simulator is started and stably operated for 1 month, the hydraulic retention time is controlled to be 3 days, the inlet water and the outlet water are sampled and detected every 3 days, and the detection indexes comprise pH, DO, ammonia nitrogen, TN, TP, COD and the like.
The most preferable framework material is clay in the wetland after repeated experiments, the wetland plant residue adopts reed residue, waste scrap iron can be recovered from waste materials of mechanical plants, and the framework material, the wetland plant residue and the reducing iron powder are mixed according to the weight ratio of 5: 3: 2, the proportion is simple to manufacture, the raw materials are easy to obtain, and the treatment effect is good.
The iron-carbon micro-electrolysis composite filler prepared in the example 4 is filled into the artificial wetland simulator under the same conditions, the volume ratio of the self-made iron-carbon micro-electrolysis composite filler to the bulk soil mixed matrix is 1:2, and the group is set as an experimental group.
The iron-carbon micro-electrolysis composite filler prepared in the example 4 is adopted, and 100% of body soil is filled in the artificial wetland simulator as a control group under the same condition.
The measured data are shown in the following table:
| group of | Removal rate of TN | NO3 --N removal rate | NH4 +-N removal rate |
| Experimental group | 76.22% | 76.23% | 81.38% |
| Control group | 67.06% | 62.59% | 72.87% |
From the treatment effect: 100% of soil, the iron-carbon micro-electrolysis composite filler and the soil mixed matrix are respectively filled, and the artificial wetland simulator is combined to treat the simulated poor water and the water, so that the denitrification effects of an experimental group and a control group are compared, and compared with the control group, the experimental group filled with 1/3 volumes of the iron-carbon micro-electrolysis composite filler is filled with TN and NO3 --N、NH4 +The N removal rate is respectively improved by 9.16 percent, 13.64 percent and 8.51 percent. In addition, when methanol was added to the feed water of the control group as an external carbon source to achieve the same denitrification efficiency as that of the experimental group. CO of experimental group compared to control group2Reduction in emission flux 33.92%, CH4The discharge flux is reduced by 62.68 percent, and the production cost is reducedThe method comprises the following steps: the iron-carbon micro-electrolysis composite filler is prepared from wetland plant residues and waste scrap iron which are solid wastes, and has low cost. The production process is simple and quick, and the production cost is low.
In conclusion, the iron-carbon micro-electrolysis composite filler has the advantages of high porosity, large specific surface area, high electron transfer rate, certain mechanical strength and biological stability, easily obtained production raw materials, low price and convenient transportation.
Claims (10)
1. The iron-carbon micro-electrolysis composite filler based on wetland plant residues is characterized in that: the wetland treatment agent comprises a framework material, wetland plant residues, reducing iron powder and a binder, wherein the component ratio of the framework material to the wetland plant residues to the reducing iron powder is 1-10: 1-10: 1-10.
2. The iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in claim 1, is characterized in that: the framework material, the wetland plant residues and the reducing iron powder are mixed to form a mixed raw material, and the component ratio of the mixed raw material to the binder is 1-10: 0.1-1.
3. The iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in claim 1 or 2, is characterized in that: the framework material is at least one of clay, bentonite and kaolin.
4. The iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in claim 3, is characterized in that: the wetland plant residue is at least one of rhizoma Acori Calami, rhizoma Phragmitis and herba Typhae residue.
5. The iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in claim 4, is characterized in that: the binder is sodium carboxymethylcellulose 3-5 ‰ aqueous solution.
6. The iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in claim 4 or 5, is characterized in that: the reducing iron powder is waste iron powder.
7. The iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in claim 6, is characterized in that: the framework material, the wetland plant residues and the reducing iron powder are mixed according to the proportion of 5: 3: 2.
8. the preparation method of the iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in any one of claims 1 to 7, characterized in that: the method comprises the following steps:
firstly, respectively crushing the framework material and the wetland plant residues to 10-100 meshes, and then screening through a sieve with the aperture of 0.150-2.0 mm;
step two, crushing the reducing iron powder to 100-200 meshes, and then carrying out screening operation by a sieve with the aperture of 0.075-0.150 mm;
step three, mixing the framework material, the wetland plant residues and the reducing iron powder obtained in the step one and the step two according to the weight ratio of 1-10: 1-10: 1-10 to form mixed raw materials;
step four, preparing the sodium carboxymethylcellulose into 3-5 per mill of aqueous solution to form a binder;
step five, uniformly mixing the binder and the mixed raw materials according to the proportion of 0.1-1:10 to form blocks;
putting the blocky mixed raw materials into a granulator, extruding, rubbing into strips, forming balls, and naturally drying at the temperature of 5-35 ℃ to obtain raw filler balls;
and step seven, placing the dried iron-carbon micro-electrolysis composite filler raw material ball in a muffle furnace, sintering for 10-120 minutes under the anaerobic condition at the temperature of 500-1000 ℃, naturally cooling to room temperature after sintering, and sealing for storage.
9. The preparation method of the wetland plant residue-based iron-carbon micro-electrolysis composite filler according to claim 8, is characterized in that: in the first step, when the crushed wetland plant residue particles are too large to be sieved, the crushed wetland plant residue particles are crushed again and then are continuously sieved.
10. The preparation method of the iron-carbon micro-electrolysis composite filler based on wetland plant residues as claimed in claim 8 or 9, wherein the preparation method comprises the following steps: in the second step, when the crushed reducing iron powder particles are too large to be sieved, the crushed reducing iron powder particles are crushed again and then are continuously sieved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210182290.0A CN114538570A (en) | 2022-02-25 | 2022-02-25 | Iron-carbon micro-electrolysis composite filler based on wetland plant residues and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210182290.0A CN114538570A (en) | 2022-02-25 | 2022-02-25 | Iron-carbon micro-electrolysis composite filler based on wetland plant residues and preparation method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114538570A true CN114538570A (en) | 2022-05-27 |
Family
ID=81679366
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210182290.0A Pending CN114538570A (en) | 2022-02-25 | 2022-02-25 | Iron-carbon micro-electrolysis composite filler based on wetland plant residues and preparation method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114538570A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253741A (en) * | 2013-05-10 | 2013-08-21 | 山东大学 | Method for preparing anti-hardening granular ceramic iron-carbon micro-electrolysis filler from industrial wastes |
| CN109911990A (en) * | 2019-03-04 | 2019-06-21 | 中国科学院过程工程研究所 | A kind of preparation method of highly active Fe carbon micro-electrolysis filler |
| CN112266140A (en) * | 2020-11-24 | 2021-01-26 | 河南永泽环境科技有限公司 | Constructed wetland biomembrane coupling iron-carbon micro-electrolysis filler |
-
2022
- 2022-02-25 CN CN202210182290.0A patent/CN114538570A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103253741A (en) * | 2013-05-10 | 2013-08-21 | 山东大学 | Method for preparing anti-hardening granular ceramic iron-carbon micro-electrolysis filler from industrial wastes |
| CN109911990A (en) * | 2019-03-04 | 2019-06-21 | 中国科学院过程工程研究所 | A kind of preparation method of highly active Fe carbon micro-electrolysis filler |
| CN112266140A (en) * | 2020-11-24 | 2021-01-26 | 河南永泽环境科技有限公司 | Constructed wetland biomembrane coupling iron-carbon micro-electrolysis filler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107216126B (en) | Preparation method of ceramsite by taking municipal sludge as raw material | |
| CN103253741B (en) | Method for preparing anti-hardening granular ceramic iron-carbon micro-electrolysis filler from industrial wastes | |
| CN103833274B (en) | A kind of heavy metal contamination soil consolidator and using method thereof | |
| CN103145442B (en) | Method for preparing sintering-free ceramsite by using chemical sludge | |
| CN108503386B (en) | Process for preparing non-sintered ceramsite by utilizing metallurgical contaminated soil | |
| CN101407407B (en) | Method for baking bricks from mixture of biological dewatered sludge and construction wastes | |
| CN110064370B (en) | Adsorption matrix for ionic rare earth mine wastewater treatment and biological grid thereof | |
| CN106810204B (en) | Fenton iron mud cathode and anode integrated ceramsite and method for preparing ceramsite by utilizing Fenton iron mud | |
| CN103909085A (en) | Integrated household garbage treatment method | |
| CN103880122A (en) | Method for preparing anti-hardening granular burning-free iron-carbon microelectrolysis filler | |
| CN104190698A (en) | Method for restoring clayed soil of high-load heavy metal polluted site | |
| CN102381868A (en) | Method for rapidly preparing ceramsite by utilizing mudflat sludge | |
| CN113912376A (en) | Baking-free ceramsite processed by utilizing red mud, fly ash, iron tailings and carbide slag solid waste as well as preparation method and application thereof | |
| CN110950520A (en) | Multiphase solid waste treatment method | |
| CN100457693C (en) | Environmental organic nutrient soil as well as preparation technique and application thereof | |
| CN104550939A (en) | Microelectrolysis packing as well as preparation method and application of microelectrolysis packing | |
| CN112957927A (en) | Porous ceramic oil-water separation membrane taking red mud waste residues as raw materials and preparation method thereof | |
| CN111995306A (en) | Non-fired ceramsite based on urban river sludge and regenerated garbage and preparation method thereof | |
| CN114538570A (en) | Iron-carbon micro-electrolysis composite filler based on wetland plant residues and preparation method thereof | |
| CN115722518B (en) | Low-carbon and high-efficiency recycling disposal system and method for building decoration garbage | |
| CN115465943A (en) | Constructed wetland nitrogen and phosphorus removal filler with slow-release carbon material and preparation method thereof | |
| CN104386768B (en) | A kind of production method of water purification filtrate | |
| CN111448968B (en) | Method for preparing greening soil by improving tail mud of water works | |
| CN112830541A (en) | Method for continuously removing phosphorus for long time by using multifunctional long-acting composite filler | |
| CN215920865U (en) | System for preparing non-sintered ceramsite by mixing gasified slag and sludge |
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 | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20230731 Address after: Room 504, South Block, Kehui Building, No. 109 Shunhua Road, High tech Zone, Jinan City, Shandong Province, 250098 Applicant after: SHANDONG ATK ENVIRONMENTAL ENGINEERING Co.,Ltd. Address before: 325000 Wenzhou City National University Science Park incubator, No. 38 Dongfang South Road, Ouhai District, Wenzhou, Zhejiang Applicant before: Wenzhou University |