CN111924959A - Novel carbon source product for sewage denitrification - Google Patents
Novel carbon source product for sewage denitrification Download PDFInfo
- Publication number
- CN111924959A CN111924959A CN202010689704.XA CN202010689704A CN111924959A CN 111924959 A CN111924959 A CN 111924959A CN 202010689704 A CN202010689704 A CN 202010689704A CN 111924959 A CN111924959 A CN 111924959A
- Authority
- CN
- China
- Prior art keywords
- parts
- carbon source
- source product
- stirring
- sewage
- 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
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
-
- 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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/02—Odour removal or prevention of malodour
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
Abstract
The invention provides a novel carbon source product for sewage denitrification, and relates to the technical field of sewage treatment. The novel carbon source product for sewage denitrification comprises the following raw materials in parts by weight: 14-18 parts of calcium oxide, 5-9 parts of sodium hydroxide, 12-20 parts of saccharides, 5-10 parts of ethylene glycol, 30-40 parts of water, 5-10 parts of sodium acetate, 10-15 parts of ferrous sulfate, 10-15 parts of activated carbon, 10-15 parts of graphite and 10-18 parts of a smell purifying agent. The novel carbon source product for sewage denitrification is scientific and reasonable, simple in process and convenient to popularize, active carbon and graphite are added into the carbon source product, other pollutants in sewage can be adsorbed and settled through the active carbon and the graphite, sewage can be settled conveniently, usability of the carbon source product is effectively improved, denitrification time can be effectively shortened through sodium hydroxide, ethylene glycol and sodium acetate in the carbon source product, and accordingly use efficiency of the carbon source product can be effectively improved.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to a novel carbon source product for sewage denitrification.
Background
In recent years, the problem of environmental pollution is increasingly prominent, and particularly, the problem of water eutrophication caused by excessive discharge of plant growth limiting elements such as nitrogen and phosphorus is increasingly serious. According to the notice issued by the national ecological environment department, for the enterprises mainly discharging nitrogen and phosphorus, automatic online monitoring equipment for total nitrogen is installed before the end of 6 months in 2018, and the automatic online monitoring equipment is networked with the environmental protection administrative department. Therefore, denitrification of wastewater has become a hot issue in wastewater treatment. In China, most sewage plants have the problem of insufficient carbon source in the operation process, particularly in southern areas, the COD of inlet water is seriously insufficient due to different living habits, and the problem is particularly prominent. At present, the most widely used traditional carbon sources mainly comprise methanol, acetic acid, glucose and ethanol, and in addition, cheaper organic substances such as industrial sewage, sludge hydrolysis and cellulose solid carbon sources are hot research points of external carbon sources.
At present, in the prior art, when the current carbon source medicament is used, because when putting into the sewage, nitrogen and phosphorus in the sewage are treated, in the use, other pollutants can not be effectively removed, the usability of the carbon source medicament can be reduced, and simultaneously, the denitrification time of the current carbon source medicament is longer after the carbon source medicament is put into the sewage, so that the use efficiency of the carbon source medicament can be reduced in the use.
Disclosure of Invention
The invention aims to provide a novel carbon source product for sewage denitrification, which can adsorb and settle other pollutants in sewage through activated carbon and graphite in the carbon source product, is convenient for further sewage treatment, and can effectively improve the denitrification efficiency and facilitate use.
In order to achieve the purpose, the invention is realized by the following technical scheme: a novel carbon source product for sewage denitrification comprises the following raw materials in parts by weight: 14-18 parts of calcium oxide, 5-9 parts of sodium hydroxide, 12-20 parts of saccharides, 5-10 parts of ethylene glycol, 30-40 parts of water, 5-10 parts of sodium acetate, 10-15 parts of ferrous sulfate, 10-15 parts of activated carbon, 10-15 parts of graphite and 10-18 parts of a smell purifying agent.
As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 14 parts of calcium oxide, 5 parts of sodium hydroxide, 12 parts of saccharides, 5 parts of ethylene glycol, 30 parts of water, 5 parts of sodium acetate, 10 parts of ferrous sulfate, 10 parts of activated carbon, 10 parts of graphite and 10 parts of a smell purifying agent.
As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 16 parts of calcium oxide, 7 parts of sodium hydroxide, 16 parts of saccharides, 8 parts of ethylene glycol, 35 parts of water, 8 parts of sodium acetate, 13 parts of ferrous sulfate, 12 parts of activated carbon, 13 parts of graphite and 14 parts of a smell purifying agent.
As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 18 parts of calcium oxide, 9 parts of sodium hydroxide, 20 parts of saccharides, 10 parts of ethylene glycol, 40 parts of water, 10 parts of sodium acetate, 15 parts of ferrous sulfate, 15 parts of activated carbon, 15 parts of graphite and 18 parts of a smell purifying agent.
As a further scheme of the invention: the saccharide is one or more of glucose, sucrose, starch and cellulose mixed according to any proportion.
As a further scheme of the invention: the granularity of the active carbon is 10-20um, and the granularity of the graphite is 40-60 um.
As a further scheme of the invention: the smell purifying agent is any one of geraniol, phenethyl alcohol, linalool, hydroxycitronellal alcohol and terpineol.
A preparation method of a novel carbon source product for sewage denitrification comprises the following steps:
s1, adding water into the reactor, adding calcium oxide, sodium hydroxide, ethylene glycol, sodium acetate and ferrous sulfate into the reactor, and stirring by a stirring paddle in the reactor at the rotating speed of 350r/min for 4-5.5 h.
And S2, after stirring in S1, adding a saccharide substance into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 2-3 h.
And S3, after stirring in S2, adding activated carbon and graphite into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 5-7 h.
And S4, after stirring in S3, adding a smell purifying agent into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 3-5 h, so that the carbon source product can be prepared.
The invention provides a novel carbon source product for sewage denitrification. The method has the following beneficial effects:
(1) the novel carbon source product for sewage denitrification is scientific and reasonable, simple in process and convenient to popularize, and other pollutants in sewage can be adsorbed and settled by adding the activated carbon and the graphite into the carbon source product, so that the sewage can be settled conveniently, and the usability of the carbon source product is effectively improved.
(2) This a novel carbon source product for sewage denitrogenation, through adding certain smell purification agent to the inside of carbon source product, no pungent smell can effectually prevent to form air pollution at the input in-process.
(3) This a novel carbon source product for sewage denitrogenation, through inside sodium hydroxide of carbon source product, ethylene glycol and sodium acetate, in using, can effectual time of accelerating denitrogenation to can effectual improvement carbon source product's availability factor.
Detailed Description
The invention is illustrated below with reference to specific examples. It will be understood by those skilled in the art that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention in any way.
Embodiment 1, a novel carbon source product for denitrification of sewage, comprising the following raw materials in parts by weight: 14 parts of calcium oxide, 5 parts of sodium hydroxide, 12 parts of saccharides, 5 parts of ethylene glycol, 30 parts of water, 5 parts of sodium acetate, 10 parts of ferrous sulfate, 10 parts of activated carbon, 10 parts of graphite and 10 parts of smell purifying agent, the carbon source product prepared by the formula and the method of the invention is scientific and reasonable, has simple process and is convenient to popularize, the activated carbon and the graphite are added into the carbon source product, other pollutants in the sewage can be adsorbed and settled through the activated carbon and the graphite, the sewage is convenient to settle, the usability of the carbon source product is effectively improved, a certain odor purifying agent is added into the carbon source product, no pungent smell exists, can effectively prevent air pollution in the feeding process, and by sodium hydroxide, ethylene glycol and sodium acetate in the carbon source product, in use, the denitrification time can be effectively accelerated, so that the use efficiency of carbon source products can be effectively improved.
Specifically, the saccharide is one or more of glucose, sucrose, starch and cellulose, and is mixed at any ratio.
Specifically, the granularity of the activated carbon is 10-20um, and the granularity of the graphite is 40-60 um.
Specifically, the odor purifying agent is any one of geraniol, phenethyl alcohol, linalool, hydroxycitronellal alcohol and terpineol.
A preparation method of a novel carbon source product for sewage denitrification comprises the following steps:
step one, adding water into a reactor, then adding calcium oxide, sodium hydroxide, ethylene glycol, sodium acetate and ferrous sulfate into the reactor, and stirring by a stirring paddle in the reactor, wherein the rotating speed of the stirring paddle is 350r/min, and the stirring time is 4-5.5 h.
And step two, after the stirring in the step one, adding the saccharides into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 2-3 h.
And step three, after the stirring in the step two, adding activated carbon and graphite into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 5-7 h.
Step four, after the stirring in the step three, adding a smell purifying agent into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 3-5 h, so that the carbon source product can be prepared.
Embodiment 2, a novel carbon source product for denitrification of sewage, comprising the following raw materials in parts by weight: 16 parts of calcium oxide, 7 parts of sodium hydroxide, 16 parts of saccharides, 8 parts of ethylene glycol, 35 parts of water, 8 parts of sodium acetate, 13 parts of ferrous sulfate, 12 parts of activated carbon, 13 parts of graphite and 14 parts of smell cleaning agent, the carbon source product prepared by the formula and the method of the invention is scientific and reasonable, has simple process and is convenient to popularize, the activated carbon and the graphite are added into the carbon source product, other pollutants in the sewage can be adsorbed and settled through the activated carbon and the graphite, the sewage is convenient to settle, the usability of the carbon source product is effectively improved, a certain odor purifying agent is added into the carbon source product, no pungent smell exists, can effectively prevent air pollution in the feeding process, and by sodium hydroxide, ethylene glycol and sodium acetate in the carbon source product, in use, the denitrification time can be effectively accelerated, so that the use efficiency of carbon source products can be effectively improved.
Specifically, the saccharide is one or more of glucose, sucrose, starch and cellulose, and is mixed at any ratio.
Specifically, the granularity of the activated carbon is 10-20um, and the granularity of the graphite is 40-60 um.
Specifically, the odor purifying agent is any one of geraniol, phenethyl alcohol, linalool, hydroxycitronellal alcohol and terpineol.
A preparation method of a novel carbon source product for sewage denitrification comprises the following steps:
step one, adding water into a reactor, then adding calcium oxide, sodium hydroxide, ethylene glycol, sodium acetate and ferrous sulfate into the reactor, and stirring by a stirring paddle in the reactor, wherein the rotating speed of the stirring paddle is 350r/min, and the stirring time is 4-5.5 h.
And step two, after the stirring in the step one, adding the saccharides into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 2-3 h.
And step three, after the stirring in the step two, adding activated carbon and graphite into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 5-7 h.
Step four, after the stirring in the step three, adding a smell purifying agent into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 3-5 h, so that the carbon source product can be prepared.
Embodiment 3, a novel carbon source product for denitrification of sewage, comprising the following raw materials in parts by weight: 18 parts of calcium oxide, 9 parts of sodium hydroxide, 20 parts of saccharides, 10 parts of ethylene glycol, 40 parts of water, 10 parts of sodium acetate, 15 parts of ferrous sulfate, 15 parts of activated carbon, 15 parts of graphite and 18 parts of smell purifying agent, the carbon source product prepared by the formula and the method of the invention is scientific and reasonable, has simple process and is convenient to popularize, the activated carbon and the graphite are added into the carbon source product, other pollutants in the sewage can be adsorbed and settled through the activated carbon and the graphite, the sewage is convenient to settle, the usability of the carbon source product is effectively improved, a certain odor purifying agent is added into the carbon source product, no pungent smell exists, can effectively prevent air pollution in the feeding process, and by sodium hydroxide, ethylene glycol and sodium acetate in the carbon source product, in use, the denitrification time can be effectively accelerated, so that the use efficiency of carbon source products can be effectively improved.
Specifically, the saccharide is one or more of glucose, sucrose, starch and cellulose, and is mixed at any ratio.
Specifically, the granularity of the activated carbon is 10-20um, and the granularity of the graphite is 40-60 um.
Specifically, the odor purifying agent is any one of geraniol, phenethyl alcohol, linalool, hydroxycitronellal alcohol and terpineol.
A preparation method of a novel carbon source product for sewage denitrification comprises the following steps:
step one, adding water into a reactor, then adding calcium oxide, sodium hydroxide, ethylene glycol, sodium acetate and ferrous sulfate into the reactor, and stirring by a stirring paddle in the reactor, wherein the rotating speed of the stirring paddle is 350r/min, and the stirring time is 4-5.5 h.
And step two, after the stirring in the step one, adding the saccharides into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 2-3 h.
And step three, after the stirring in the step two, adding activated carbon and graphite into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 5-7 h.
Step four, after the stirring in the step three, adding a smell purifying agent into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 3-5 h, so that the carbon source product can be prepared.
Examples 1, 2 and 3 differ in the content of the components of the internal composition, and the preparation methods thereof are the same.
In order to further illustrate the beneficial effects of the present invention, the inventors selected the existing carbon source product, and also selected the carbon source product prepared by the present invention, and compared the feeding odor, feeding time, nitrogen content in sewage, and precipitation effect of the carbon source product, the following data were obtained, as detailed in table 1:
TABLE 1 Experimental data sheet
As can be seen from the above experimental data, the administered odors of examples 1-3 were not generated upon use, thus, the carbon source product has no pungent smell by adding a certain odor purifying agent into the carbon source product, can effectively prevent air pollution from being formed in the feeding process, and the nitrogen content of the sewage is reduced in the embodiments 1-3, thereby showing that the nitrogen pollution is reduced by sodium hydroxide, ethylene glycol and sodium acetate in the carbon source product, in use, the denitrification time can be effectively accelerated, so that the use efficiency of carbon source products can be effectively improved, the precipitates in the examples 1-3 are more, therefore, the activated carbon and the graphite are added into the carbon source product, other pollutants in the sewage can be adsorbed and settled through the activated carbon and the graphite, the sewage is convenient to settle, and the usability of the carbon source product is effectively improved.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (8)
1. A novel carbon source product for sewage denitrification is characterized by comprising the following raw materials in parts by weight: 14-18 parts of calcium oxide, 5-9 parts of sodium hydroxide, 12-20 parts of saccharides, 5-10 parts of ethylene glycol, 30-40 parts of water, 5-10 parts of sodium acetate, 10-15 parts of ferrous sulfate, 10-15 parts of activated carbon, 10-15 parts of graphite and 10-18 parts of a smell purifying agent.
2. The novel carbon source product for sewage denitrification according to claim 1, comprising the following raw materials in parts by weight: 14 parts of calcium oxide, 5 parts of sodium hydroxide, 12 parts of saccharides, 5 parts of ethylene glycol, 30 parts of water, 5 parts of sodium acetate, 10 parts of ferrous sulfate, 10 parts of activated carbon, 10 parts of graphite and 10 parts of a smell purifying agent.
3. The novel carbon source product for sewage denitrification according to claim 1, comprising the following raw materials in parts by weight: 16 parts of calcium oxide, 7 parts of sodium hydroxide, 16 parts of saccharides, 8 parts of ethylene glycol, 35 parts of water, 8 parts of sodium acetate, 13 parts of ferrous sulfate, 12 parts of activated carbon, 13 parts of graphite and 14 parts of a smell purifying agent.
4. The novel carbon source product for sewage denitrification according to claim 1, comprising the following raw materials in parts by weight: 18 parts of calcium oxide, 9 parts of sodium hydroxide, 20 parts of saccharides, 10 parts of ethylene glycol, 40 parts of water, 10 parts of sodium acetate, 15 parts of ferrous sulfate, 15 parts of activated carbon, 15 parts of graphite and 18 parts of a smell purifying agent.
5. The novel carbon source product for sewage denitrification according to any one of claims 1-4, wherein the carbohydrate is one or more of glucose, sucrose, starch and cellulose mixed in any proportion.
6. The novel carbon source product for denitrification of wastewater as claimed in any of claims 1-4, wherein the particle size of the activated carbon is 10-20um, and the particle size of the graphite is 40-60 um.
7. The novel carbon source product for sewage denitrification according to any one of claims 1-4, wherein the odor purifying agent is any one of geraniol, phenethyl alcohol, linalool, hydroxycitronellal alcohol and terpineol.
8. The method for preparing a novel carbon source product for denitrification of wastewater according to any one of claims 1-4, comprising the steps of:
s1, adding water into the reactor, adding calcium oxide, sodium hydroxide, ethylene glycol, sodium acetate and ferrous sulfate into the reactor, and stirring by a stirring paddle in the reactor at the rotating speed of 350r/min for 4-5.5 h;
s2, after stirring in S1, adding a saccharide substance into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 2-3 h;
s3, after stirring in S2, adding activated carbon and graphite into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 5-7 h;
and S4, after stirring in S3, adding a smell purifying agent into the reactor, and stirring by a stirring paddle, wherein the rotating speed of the stirring paddle is 400r/min, and the stirring time is 3-5 h, so that the carbon source product can be prepared.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689704.XA CN111924959A (en) | 2020-07-17 | 2020-07-17 | Novel carbon source product for sewage denitrification |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010689704.XA CN111924959A (en) | 2020-07-17 | 2020-07-17 | Novel carbon source product for sewage denitrification |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111924959A true CN111924959A (en) | 2020-11-13 |
Family
ID=73313141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010689704.XA Pending CN111924959A (en) | 2020-07-17 | 2020-07-17 | Novel carbon source product for sewage denitrification |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111924959A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040164029A1 (en) * | 2003-02-21 | 2004-08-26 | The Procter & Gamble Company | Water treatment compositions with masking agent |
| CN105948458A (en) * | 2016-07-14 | 2016-09-21 | 慎叶 | Novel deodorant for sewage treatment plant |
| CN110526419A (en) * | 2019-08-22 | 2019-12-03 | 天津壹新环保工程有限公司 | A kind of carbon source medicament for sewage treatment |
| CN110902811A (en) * | 2019-12-10 | 2020-03-24 | 西安益维普泰环保股份有限公司 | Sewage composite carbon source agent and preparation method thereof |
-
2020
- 2020-07-17 CN CN202010689704.XA patent/CN111924959A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040164029A1 (en) * | 2003-02-21 | 2004-08-26 | The Procter & Gamble Company | Water treatment compositions with masking agent |
| CN105948458A (en) * | 2016-07-14 | 2016-09-21 | 慎叶 | Novel deodorant for sewage treatment plant |
| CN110526419A (en) * | 2019-08-22 | 2019-12-03 | 天津壹新环保工程有限公司 | A kind of carbon source medicament for sewage treatment |
| CN110902811A (en) * | 2019-12-10 | 2020-03-24 | 西安益维普泰环保股份有限公司 | Sewage composite carbon source agent and preparation method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102583741A (en) | Slow-release carbon source material using sodium alginate as base material and preparation method thereof | |
| CN102600806B (en) | Straw modified into strong cation type absorbent and preparation method thereof | |
| CN102139202A (en) | Cellulose base adsorption material used for removing arsenic ions and fluoric ions in water and preparation method thereof | |
| US20150175456A1 (en) | Biological denitrogenation method using slow release solid carbon source | |
| CN110255712B (en) | Preparation method of denitrification carbon source | |
| US20100300962A1 (en) | Methods for treating wastewater using an organic coagulant | |
| CN113264588B (en) | Composite carbon source for sewage treatment | |
| CN113788537A (en) | Low-C/N-ratio sewage biological denitrification composite carbon source and preparation method thereof | |
| CN113666494A (en) | Polyethylene glycol-containing sewage biological denitrification composite carbon source and preparation method thereof | |
| CN1609068A (en) | Multifunctional re-mixed organic-inorganic fertilizer and its prepn process | |
| CN111018137A (en) | Efficient composite carbon source medicament and preparation method thereof | |
| CN105481044A (en) | Efficient sewage treating tablets and preparation method thereof | |
| CN110156175A (en) | A kind of compounded carbons medicament and preparation method thereof | |
| CN111420690A (en) | Preparation of ZnO-g-C3N4 photocatalyst and application thereof in water ibuprofen degradation drugs | |
| CN111924959A (en) | Novel carbon source product for sewage denitrification | |
| CN108726669A (en) | A kind of method that magnetic activated sludge process synchronizes a variety of non-steroidal estrogenics of removal | |
| CN113185074A (en) | Method for promoting accumulation of sludge anaerobic fermentation short-chain fatty acids by combined pretreatment of free nitrous acid and calcium peroxide | |
| CN105036885A (en) | Organic traditional Chinese medicine fertilizer additive | |
| CN112777753A (en) | Composite carbon source medicament and preparation method and application thereof | |
| CN110902811A (en) | Sewage composite carbon source agent and preparation method thereof | |
| CN110526419A (en) | A kind of carbon source medicament for sewage treatment | |
| CN105692841A (en) | Composite component for sewage treatment and preparation method thereof | |
| CN104973686A (en) | Method for preparing solid carbon source for nitrogen removal of aquaculture wastewater | |
| CN111115853A (en) | Safe composite carbon source and production process thereof | |
| CN111115846A (en) | Sewage treatment agent for aquaculture wastewater 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 | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20201113 |
|
| WD01 | Invention patent application deemed withdrawn after publication |