CN108191005B - Preparation method of modified iron-carbon electrolysis micro-nano structure and sewage treatment method - Google Patents
Preparation method of modified iron-carbon electrolysis micro-nano structure and sewage treatment method Download PDFInfo
- Publication number
- CN108191005B CN108191005B CN201810101633.XA CN201810101633A CN108191005B CN 108191005 B CN108191005 B CN 108191005B CN 201810101633 A CN201810101633 A CN 201810101633A CN 108191005 B CN108191005 B CN 108191005B
- Authority
- CN
- China
- Prior art keywords
- nano structure
- modified iron
- micro
- carbon
- sewage treatment
- 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
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
-
- 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
- C02F3/005—Combined electrochemical biological processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/46—Apparatus for electrochemical processes
- C02F2201/461—Electrolysis apparatus
- C02F2201/46105—Details relating to the electrolytic devices
Abstract
The invention discloses a preparation method of a modified iron-carbon electrolysis micro-nano structure and a sewage treatment method, and the preparation method comprises the following steps: 1) taking FeSO4Preparing 3 parts of ferrous sulfate solution, adjusting the pH value of the ferrous sulfate solution to 1 by using acid, and soaking the wood chips and the bamboo powder in the ferrous sulfate solution for 40-48 hours; 2) taking out the sawdust and the bamboo powder which are fully permeated by the ferrous sulfate, and heating for 6-9 hours at the temperature of 800-1500 ℃ in a compact space to obtain the modified iron-carbon electrolysis micro-nano structure. The modified iron-carbon electrolysis micro-nano structure prepared by the preparation method of the modified iron-carbon electrolysis micro-nano structure is used for sewage treatment, and has the following beneficial effects: 1) in the earlier stage of sewage treatment, macromolecules in the industrial sewage can be electrolyzed into micromolecular structures; 2) the modified iron-carbon micro-nano structure provides a biological carrier for microorganisms, and the structure has a large specific surface area and a compact structure; 3) the chroma of the treated industrial sewage can reach within 10 times, and the standard of industrial reuse water is reached.
Description
Technical Field
The invention relates to the field of electrochemical sewage treatment, in particular to a preparation method of a modified iron-carbon electrolysis micro-nano structure and a sewage treatment method.
Background
The problem of water resource and environmental pollution is increasingly paid attention to human society, on one hand, the fresh water consumption is continuously increased, the water resource is increasingly in short supply, on the other hand, the sewage discharge amount is increasingly increased, and the environmental pollution is increasingly serious, so that the sewage treatment and the recycling of the regenerated resources are increasingly paid attention to various countries. China is a country with serious shortage of water resources, the occupied amount of per capita fresh water resources is only one fourth of the average level in the world, and the per capita fresh water resources are one of 13 countries with the most water shortage in the world, so that the recycling of sewage becomes the key for solving the shortage of fresh water resources. However, most of the current sewage treatment in China is up-to-standard discharge, mature sewage regeneration recycling technology is few, and the application to engineering practice is few and few, and a large amount of sewage is treated up to the standard and then directly discharged into rivers, lakes and sea areas every day, which not only causes waste of water resources but also pollutes the environment, and in the past, the sustainable development of water resources is inevitably caused. According to introduction, industrial water accounts for about 2/3 in the total urban water resource consumption in China, and if sewage is used for industrial water after being subjected to regeneration treatment, the industrial water has great potential in the aspect of water saving, which is equal to the increase of the total amount of fresh water resources of 2/3.
In the present year, the method for treating sewage by microorganisms gradually enters the field of view of the public, but the treatment effect is not ideal, and the problems to be solved are as follows: 1) the structure of the microbial carrier is not compact, so that the actual microbial biomass is less, and the final COD removal rate is not ideal and is more than 70; 2) the components in the industrial sewage are complex, and the better effect is difficult to achieve only by using microorganisms for treatment, particularly, the environment in the industrial sewage is not suitable for the survival and propagation of the microorganisms in the early stage, so that the industrial sewage is difficult to treat and poor in effect; 3) in the prior art, after sewage is treated, the treated water needs to be treated by using a medicament, so that the chromaticity meets the corresponding requirement, and the steps are complex.
Disclosure of Invention
The invention aims to provide a preparation method of a modified iron-carbon electrolysis micro-nano structure, and provides a preparation method of a modified iron-carbon micro-nano structure.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a preparation method of a modified iron-carbon electrolysis micro-nano structure comprises the following steps:
1) taking FeSO4Preparing 3 parts of ferrous sulfate solution, adjusting the pH value of the ferrous sulfate solution to 1 by using acid, and soaking the wood chips and the bamboo powder in the ferrous sulfate solution for 40-48 hours;
2) taking out the sawdust and bamboo powder which are fully permeated by ferrous sulfate, and heating for 6-9 h at the temperature of 800-1500 ℃ in a compact space to prepare the modified iron-carbon electrolysis micro-nano structure.
Preferably, the acid in step 1) is sulfuric acid.
Preferably, the heating time of the compact space in the step 2) is 8 h.
A sewage treatment method comprises the following steps:
1) placing the modified iron-carbon electrolysis micro-nano structure prepared according to the claims 1-3 in a humid environment for 1-2 days;
2) the first input amount is one thousandth of the sewage treatment amount, specifically, 1 ton of the modified iron-carbon micro-nano structure is input into every 1000 tons of industrial sewage;
3) the second input amount is one ten thousandth of the sewage treatment amount, and specifically, 1 ton of the modified iron-carbon micro-nano structure is input into each 10000 tons of industrial sewage.
Compared with the prior art, the modified iron-carbon electrolysis micro-nano structure and the preparation method thereof have the following beneficial effects:
1) the modified iron-carbon electrolysis micro-nano structure prepared by the method can electrolyze macromolecules in industrial sewage into a micromolecular structure in the earlier stage of sewage treatment;
2) the modified iron-carbon micro-nano structure provides a biological carrier for microorganisms, and the structure has a large specific surface area and a compact structure;
3) the prepared Fe-C structure is activated by being placed in a humid environment before use and is put into industrial sewage, and because the Fe-C structure is a compact micro-nano structure, the distance is infinitesimal, the current is infinitesimal, macromolecules in the industrial sewage can be electrolyzed into small molecules, so that microorganisms can carry out biodegradation on the small molecules, the micro-nano structure also provides a microorganism carrier with an active surface for the microorganisms, the propagation of the microorganisms is facilitated, and the specific surface area is 10-20 times that of the carrier in the prior art;
4) the chroma of the industrial reuse water is less than 15 times, the industrial sewage treated by the modified iron-carbon micro-nano structure does not need to be treated by using a medicament, and the chroma of the treated industrial sewage can reach within 10 times and reaches the standard of the industrial reuse water.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
A preparation method of a modified iron-carbon electrolysis micro-nano structure comprises the following steps:
1) taking 3 parts of FeSO4Preparing a ferrous sulfate solution, adjusting the pH value of the ferrous sulfate solution to 1 by using sulfuric acid, and soaking the wood chips and the bamboo powder in the ferrous sulfate solution for 40 hours;
2) taking out the sawdust and bamboo powder which are fully permeated by ferrous sulfate, and heating the sawdust and bamboo powder at the temperature of 800-1500 ℃ in a compact space for 6 to prepare the modified iron-carbon electrolysis micro-nano structure.
A sewage treatment method comprises the following steps:
3) placing the prepared modified iron-carbon electrolysis micro-nano structure in a humid environment for 1-2 days;
4) the first input amount is one thousandth of the sewage treatment amount, specifically, 1 ton of the modified iron-carbon micro-nano structure is input into every 1000 tons of industrial sewage;
5) the second input amount is one ten thousandth of the sewage treatment amount, and specifically, 1 ton of the modified iron-carbon micro-nano structure is input into each 10000 tons of industrial sewage.
Example 2
A preparation method of a modified iron-carbon electrolysis micro-nano structure comprises the following steps:
1) taking FeSO4Preparing 3 parts of ferrous sulfate solution, adjusting the pH value of the ferrous sulfate solution to 1 by using sulfuric acid, and placing the wood chips and the bamboo powder in the ferrous sulfate solution for soaking for 44 hours;
2) taking out the sawdust and bamboo powder which are fully permeated by ferrous sulfate, and heating the sawdust and bamboo powder for 8 hours at the temperature of 800-1500 ℃ in a compact space to prepare the modified iron-carbon electrolysis micro-nano structure.
A sewage treatment method comprises the following steps:
3) placing the prepared modified iron-carbon electrolysis micro-nano structure in a humid environment for 1-2 days;
4) the first input amount is one thousandth of the sewage treatment amount, specifically, 1 ton of the modified iron-carbon micro-nano structure is input into every 1000 tons of industrial sewage;
5) the second input amount is one ten thousandth of the sewage treatment amount, and specifically, 1 ton of the modified iron-carbon micro-nano structure is input into each 10000 tons of industrial sewage.
Example 3
A preparation method of a modified iron-carbon electrolysis micro-nano structure comprises the following steps:
1) taking FeSO4Preparing 3 parts of ferrous sulfate solution, adjusting the pH value of the ferrous sulfate solution to 1 by using sulfuric acid, and placing the wood chips and the bamboo powder in the ferrous sulfate solution for soaking for 48 hours;
2) taking out the sawdust and bamboo powder which are fully permeated by ferrous sulfate, and heating the sawdust and bamboo powder for 9 hours at the temperature of 800-1500 ℃ in a compact space to prepare the modified iron-carbon electrolysis micro-nano structure.
A sewage treatment method comprises the following steps:
3) placing the prepared modified iron-carbon electrolysis micro-nano structure in a humid environment for 1-2 days;
4) the first input amount is one thousandth of the sewage treatment amount, specifically, 1 ton of the modified iron-carbon micro-nano structure is input into every 1000 tons of industrial sewage;
5) the second input amount is one ten thousandth of the sewage treatment amount, and specifically, 1 ton of the modified iron-carbon micro-nano structure is input into each 10000 tons of industrial sewage.
Table 1 water quality conditions after treatment of modified iron-carbon electrolysis micro-nano structures of embodiments 1-3
Compared with the prior art, the modified iron-carbon electrolysis micro-nano structure and the preparation method thereof have the following beneficial effects:
1) the modified iron-carbon electrolysis micro-nano structure prepared by the method can electrolyze macromolecules in industrial sewage into a micromolecular structure in the earlier stage of sewage treatment;
2) the modified iron-carbon micro-nano structure provides a biological carrier for microorganisms, and the structure has a large specific surface area and a compact structure;
3) the prepared Fe-C structure is activated by being placed in a humid environment before use, and is directly poured and put into industrial sewage, because the Fe-C structure is a compact micro-nano structure, the distance is infinitely small, the current is infinitely large, macromolecules in the industrial sewage can be electrolyzed into small molecules, and then the microorganisms can carry out biodegradation on the small molecules, the micro-nano structure also provides a microorganism carrier with an active surface for the microorganisms, the propagation of the microorganisms is convenient, and the specific surface area is 10-20 times that of the carrier in the prior art;
4) the chroma of the industrial reuse water is less than 15 times, the industrial sewage treated by the modified iron-carbon micro-nano structure does not need to be treated by using a medicament, and the chroma of the treated industrial sewage can reach within 10 times and reaches the standard of the industrial reuse water;
5) the sewage treatment method is simple and takes effect quickly, substances prepared by the modified iron-carbon micro-nano structure preparation method contain colloidal substances with positive charges, the colloidal substances can be used as flocculating agents, suspended substances in industrial wastewater are in a suspended state with negative charges in water, the colloidal substances can flocculate suspended substances in water when being put into the water, the chromaticity of water quality is greatly improved, and the substances are not medicament substances and do no harm to organisms.
The above description of the embodiments is only intended to facilitate the understanding of the method of the invention and its core idea. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (1)
1. A sewage treatment method is characterized in that: the method comprises the following steps:
a, preparing a modified iron-carbon electrolysis micro-nano structure, which comprises the following steps:
1) taking 3 parts of FeSO4Preparing ferrous sulfate solution, adjusting pH of the ferrous sulfate solution to 1 with sulfuric acid, and adding wood dust and bamboo powderSoaking in a ferrous sulfate solution for 40-48 h;
2) taking out the sawdust and bamboo powder which are fully permeated by ferrous sulfate, and heating the sawdust and bamboo powder for 8 hours at the temperature of 800-1500 ℃ in a compact space to prepare a modified iron-carbon electrolysis micro-nano structure;
the sewage treatment method comprises the following steps:
1) placing the modified iron-carbon electrolysis micro-nano structure prepared in the step A in a humid environment for 1-2 days;
2) the first input amount is one thousandth of the sewage treatment amount, specifically, 1 ton of the modified iron-carbon micro-nano structure is input into every 1000 tons of industrial sewage;
3) the second input amount is one ten thousandth of the sewage treatment amount, and specifically, 1 ton of the modified iron-carbon micro-nano structure is input into each 10000 tons of industrial sewage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101633.XA CN108191005B (en) | 2018-02-01 | 2018-02-01 | Preparation method of modified iron-carbon electrolysis micro-nano structure and sewage treatment method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810101633.XA CN108191005B (en) | 2018-02-01 | 2018-02-01 | Preparation method of modified iron-carbon electrolysis micro-nano structure and sewage treatment method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108191005A CN108191005A (en) | 2018-06-22 |
| CN108191005B true CN108191005B (en) | 2021-12-28 |
Family
ID=62591675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810101633.XA Active CN108191005B (en) | 2018-02-01 | 2018-02-01 | Preparation method of modified iron-carbon electrolysis micro-nano structure and sewage treatment method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108191005B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110980858B (en) * | 2019-11-25 | 2021-10-01 | 中国科学技术大学 | Method for removing halogenated organic matters in sewage |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422693A (en) * | 2001-12-07 | 2003-06-11 | 巴斯福股份公司 | Preparation of ruthenium/iron catalyst loaded onto carbon |
| KR20090021798A (en) * | 2007-08-28 | 2009-03-04 | 충북대학교 산학협력단 | Preaparation of mesoporosity in activated carbons using fe-exchange |
| CN101830588A (en) * | 2010-04-30 | 2010-09-15 | 浙江大学 | Materialization processing method of chemical wastewater containing amino modified siloxane polymers |
| CN104925913A (en) * | 2015-06-18 | 2015-09-23 | 北京林业大学 | Catalytic particle electrode used for removing refractory organics and ammonia nitrogen from wastewater and preparation method and application thereof |
| CN105838324A (en) * | 2016-04-25 | 2016-08-10 | 中国科学院西安光学精密机械研究所 | Preparation method of iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material |
| CN106268550A (en) * | 2016-07-26 | 2017-01-04 | 大连理工大学 | Micro-charcoal ball load nano zero-valence iron composite material and preparation method thereof |
| CN106807325A (en) * | 2016-11-10 | 2017-06-09 | 广州大学 | Fe/C composites and its application |
| CN106902733A (en) * | 2017-02-15 | 2017-06-30 | 上海理工大学 | A kind of preparation method of cotton leftover bits and pieces base load iron absorbent charcoal material |
| CN106964197A (en) * | 2017-04-26 | 2017-07-21 | 吉林师范大学 | A kind of Supported On Granular Activated Carbon Nanoscale Iron composite filter element material and preparation method thereof |
| CN107096501A (en) * | 2017-05-27 | 2017-08-29 | 长安大学 | It is a kind of to be used to adsorb load iron ion activity charcoal of xanthate and preparation method thereof and adsorption method |
| CN107262096A (en) * | 2017-06-22 | 2017-10-20 | 南京理工大学 | A kind of preparation method of support type charcoal catalysis material |
| KR20170128728A (en) * | 2016-05-13 | 2017-11-23 | 주식회사 다산컨설턴트 | Activated carbon for adsorption of arsenic and manufacturing method thereof |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5403809A (en) * | 1992-12-21 | 1995-04-04 | W. R. Grace & Co.-Conn. | Composite inorganic supports containing carbon for bioremediation |
| US8518680B2 (en) * | 2009-04-17 | 2013-08-27 | The United States Of America, As Represented By The Secretary Of Agriculture | Biological/electrolytic conversion of biomass to hydrocarbons |
| JP5759707B2 (en) * | 2010-11-30 | 2015-08-05 | 住友化学株式会社 | Denatured product |
| US8980789B2 (en) * | 2012-01-06 | 2015-03-17 | Celanese International Corporation | Modified catalyst supports |
| CN203128288U (en) * | 2012-11-09 | 2013-08-14 | 江苏百纳环境工程有限公司 | Combined biochar reinforced denitration filling |
| CN103011465A (en) * | 2012-12-07 | 2013-04-03 | 常州大学 | Method for removing chloride ion in sewage |
| US20160362706A1 (en) * | 2014-06-23 | 2016-12-15 | The Trustees Of Columbia University In The City Of New York | Methods and systems for producing products using engineered iron oxidizing bacteria and copper metal |
| CN106268635A (en) * | 2016-08-10 | 2017-01-04 | 广州市金龙峰环保设备工程有限公司 | A kind of ferrum charcoal biologic grain and its preparation method and application |
| CN106215870A (en) * | 2016-10-11 | 2016-12-14 | 嘉兴德扬生物科技有限公司 | A kind of new modified bamboo powder and preparation method thereof |
| CN107200385B (en) * | 2017-07-18 | 2021-02-19 | 上海明奥环保科技有限公司 | Method for preparing porous micro-electrolysis particles by using iron carbon or Fenton sludge in wastewater treatment process |
| CN107265551A (en) * | 2017-07-28 | 2017-10-20 | 安徽科浦环保科技有限公司 | A kind of preparation method of organic wastewater purifying bamboo charcoal |
-
2018
- 2018-02-01 CN CN201810101633.XA patent/CN108191005B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1422693A (en) * | 2001-12-07 | 2003-06-11 | 巴斯福股份公司 | Preparation of ruthenium/iron catalyst loaded onto carbon |
| KR20090021798A (en) * | 2007-08-28 | 2009-03-04 | 충북대학교 산학협력단 | Preaparation of mesoporosity in activated carbons using fe-exchange |
| CN101830588A (en) * | 2010-04-30 | 2010-09-15 | 浙江大学 | Materialization processing method of chemical wastewater containing amino modified siloxane polymers |
| CN104925913A (en) * | 2015-06-18 | 2015-09-23 | 北京林业大学 | Catalytic particle electrode used for removing refractory organics and ammonia nitrogen from wastewater and preparation method and application thereof |
| CN105838324A (en) * | 2016-04-25 | 2016-08-10 | 中国科学院西安光学精密机械研究所 | Preparation method of iron/iron carbide-loaded porous carbon sphere composite wave-absorbing material |
| KR20170128728A (en) * | 2016-05-13 | 2017-11-23 | 주식회사 다산컨설턴트 | Activated carbon for adsorption of arsenic and manufacturing method thereof |
| CN106268550A (en) * | 2016-07-26 | 2017-01-04 | 大连理工大学 | Micro-charcoal ball load nano zero-valence iron composite material and preparation method thereof |
| CN106807325A (en) * | 2016-11-10 | 2017-06-09 | 广州大学 | Fe/C composites and its application |
| CN106902733A (en) * | 2017-02-15 | 2017-06-30 | 上海理工大学 | A kind of preparation method of cotton leftover bits and pieces base load iron absorbent charcoal material |
| CN106964197A (en) * | 2017-04-26 | 2017-07-21 | 吉林师范大学 | A kind of Supported On Granular Activated Carbon Nanoscale Iron composite filter element material and preparation method thereof |
| CN107096501A (en) * | 2017-05-27 | 2017-08-29 | 长安大学 | It is a kind of to be used to adsorb load iron ion activity charcoal of xanthate and preparation method thereof and adsorption method |
| CN107262096A (en) * | 2017-06-22 | 2017-10-20 | 南京理工大学 | A kind of preparation method of support type charcoal catalysis material |
Non-Patent Citations (1)
| Title |
|---|
| "Novel synthesis of carbon spheres supported nanoscale zero-valent iron for removal of metronidazole";Xiangyu Wang等;《Applied Surface Science》;20160809;第390卷;第50-59页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108191005A (en) | 2018-06-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101234836B (en) | Garbage percolate treatment technique | |
| CN206553350U (en) | A kind of two-stage manual controlled infusion of intensified denitrification and dephosphorization | |
| CN105130011A (en) | Diatomite sewage treating agent, preparation method and technology application thereof | |
| JP2020524076A (en) | Method to upgrade and expand capacity of activated sludge process by biological treatment process of sewage based on functional floating carrier | |
| CN101774690A (en) | Device for improving AAO treated dyeing wastewater and method thereof | |
| CN203976586U (en) | Printing and dyeing wastewater treatment system | |
| CN104478171A (en) | Reusing treatment method and system for municipal wastewater | |
| CN202849208U (en) | Wastewater treatment system during production of white spirit | |
| CN110395851A (en) | High aititude urban wastewater treatment method based on nitrogen phosphorus capture and whole process autotrophic denitrification | |
| CN103936230B (en) | The sewage water treatment method that a kind of activated sludge process and biological contact oxidation process combine | |
| CN103708596B (en) | In a kind of white wine wastewater conventional process, strengthening is removed and reclaims the method for nitrogen phosphorus | |
| CN101659502A (en) | Method for treating waste leachate by utilizing high denitrification shared type Orbal oxidation ditch | |
| CN108191005B (en) | Preparation method of modified iron-carbon electrolysis micro-nano structure and sewage treatment method | |
| CN114477641A (en) | Treatment method of comprehensive sewage of fine chemical industry park | |
| CN103951140B (en) | The low concentration wastewater treatment process of a kind of anaerobic built-in zero-valent iron reactor coupling artificial swamp | |
| CN108793588A (en) | A kind of percolate treatment processing method based on advanced oxidation group technology | |
| CN105152478A (en) | Treatment method of industrial wastewater produced during preparation of sodium glutamate through concentration isoelectric process | |
| CN102557211B (en) | Multi-functional composite bioflocculant for wastewater treatment | |
| CN102674618B (en) | High-efficient treatment method for biologically-enhanced coking waste water for biological membrane | |
| WO2023065653A1 (en) | High-efficiency denitrification and dephosphorization process system for mariculture tail water treatment | |
| CN102863078B (en) | Method for treating chemical industrial wastewater | |
| CN105384304A (en) | Domestic sewage treatment method by mounting biological stuffing in A/O biochemical system | |
| CN203269723U (en) | Wastewater treatment equipment for corn deep-processing | |
| CN101973661B (en) | Treatment method of processing wastewater of Chinese galls | |
| CN101723564B (en) | Garbage percolate treating process by biochemical and membrane separation |
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 |