CN112591883A - Composite filler for deep nitrogen and phosphorus removal of tail water and preparation method thereof - Google Patents
Composite filler for deep nitrogen and phosphorus removal of tail water and preparation method thereof Download PDFInfo
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- CN112591883A CN112591883A CN202011334903.5A CN202011334903A CN112591883A CN 112591883 A CN112591883 A CN 112591883A CN 202011334903 A CN202011334903 A CN 202011334903A CN 112591883 A CN112591883 A CN 112591883A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2806—Anaerobic processes using solid supports for microorganisms
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Abstract
The invention discloses a composite filler for deep nitrogen and phosphorus removal of tail water, which comprises a main material and an embedded material, wherein the main material comprises sulfur powder, tuff powder and lime powder, and the volume ratio of the sulfur powder, the tuff powder and the lime powder is 5: 3: 2; the embedded material comprises sponge iron powder, sodium thiosulfate and zeolite powder, and the volume ratio of the embedded material to the zeolite powder is 6: 3: 1; the invention enables the components to be uniformly mixed, effectively improves the utilization efficiency of the components and greatly improves the nitrogen and phosphorus removal capability of the device.
Description
Technical Field
The invention belongs to the field of water treatment, and relates to a composite filler for deep nitrogen and phosphorus removal of tail water and a preparation method thereof.
Background
With the development of economy, nitrogen, phosphorus and other nutrient elements discharged into natural water are increasingly increased, so that water eutrophication is caused, and water quality is deteriorated. The tail water discharged by sewage plant still contains high nitrogen and phosphorus, the C/N is low, and a large amount of carbon sources are consumed by using the traditional denitrification technology, so that secondary pollution is possibly caused. In the aspect of nitrogen removal, the sulfur autotrophic denitrification technology is widely adopted due to the advantages of no need of adding a carbon source, low price and the like, but the pH of effluent is low, the nitrogen removal effect is restricted to a certain extent, in the aspect of phosphorus removal, sponge iron and tuff are generally adopted for phosphorus removal, but the phosphorus removal capability of the sponge iron or tuff is influenced due to the low solubility of the blocky sponge iron or tuff, and therefore, a high-efficiency nitrogen and phosphorus removal composite filler needs to be designed aiming at the problems.
Disclosure of Invention
Aiming at the problems, the invention provides a composite filler for deep nitrogen and phosphorus removal of tail water and a preparation method thereof, and well solves the problems that the pH value of effluent is easily reduced by a sulfur autotrophic denitrification technology, the nitrogen removal effect is influenced, and the phosphorus removal capability is influenced due to low solubility of blocky sponge iron or tuff.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a composite filler for deep nitrogen and phosphorus removal of tail water comprises a main material and an embedded material, wherein the main material comprises sulfur powder, tuff powder and lime powder, and the volume ratio of the sulfur powder, the tuff powder and the lime powder is 5: 3: 2; the embedded material comprises sponge iron powder, sodium thiosulfate and zeolite powder, and the volume ratio of the embedded material to the zeolite powder is 6: 3: 1.
Further, S1: taking sulfur powder, tuff powder and lime powder according to a certain proportion, mixing, marking as a product A, adding a certain amount of water into the product A, uniformly stirring, adding gypsum with the mass being 5% of that of the product A at a constant speed, fully stirring to obtain a slurry product, marking as a product B, granulating the product B, and marking as a product C;
s2: forming a through hole in the product C in the S1;
s3: mixing sponge iron powder, sodium thiosulfate and zeolite powder according to a certain proportion, marking as a product D, adding a certain amount of water into the product D, uniformly stirring, and then adding 1% xanthan gum to obtain outer layer material slurry, marking as a product E;
s4: and (4) placing the product C with holes obtained in the step (S2) into the product E obtained in the step (S3), filling the hole parts of the product C with the product E, and naturally drying to form particles.
Further, the mass of the water in step S1 was 50% of the mass of the product a.
Further, the particle size of the product C in the step S1 is 8-10 mm.
Furthermore, in step S2, two cross-shaped through holes with a diameter of 1-2mm are formed in the product C.
Further, the mass of the water in step S3 was 60% of the mass of the product D.
Further, the particle size of the particles in step S4 is 8-10 mm.
Further, the particles are used for nitrogen and phosphorus removal of tail water of sewage plants.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention enables the components to be uniformly mixed, effectively improves the utilization efficiency of the components and greatly improves the nitrogen and phosphorus removal capability of the device.
2. Compared with the traditional composite filler, the composite filler can greatly improve the autotrophic denitrification capability of the device, the filler prepared by the method is adopted, the sodium thiosulfate is beneficial to quickly enriching the sulfur autotrophic denitrifying bacteria, and the sulfur powder increases the specific surface area of sulfur, so that the sulfur dissolution rate in the sulfur autotrophic denitrification process is increased, and the denitrification effect is promoted.
3. Compared with the traditional composite filler, the composite filler can greatly improve the phosphorus removal capability of the device, and the sponge iron in the invention increases the specific surface area and strengthens the phosphorus removal capability.
4. The lime and the zeolite are added in the invention, so that the pH value of the tail water can be effectively adjusted.
5. The embedded filler has lower hardness and is suitable for rapidly enriching and growing microorganisms; the main body filler has higher hardness, which is beneficial to prolonging the service life of the filler.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The technical scheme adopted by the invention is as follows: a composite filler for deep nitrogen and phosphorus removal of tail water comprises a main material and an embedded material, wherein the main material comprises sulfur powder, tuff powder and lime powder, preferably, the volume ratio of the sulfur powder, the tuff powder and the lime powder is 5: 3: 2, the tuff powder and the lime powder can enhance cohesiveness by compounding, and meanwhile, the pH value is adjusted in a denitrification process; the embedded material comprises sponge iron powder, sodium thiosulfate and zeolite powder, preferably, the volume ratio of the embedded material to the zeolite powder is 6: 3: 1, and the sodium thiosulfate is favorable for quickly enriching sulfur autotrophic denitrifying bacteria, reducing nitrite in water and reducing eutrophication of water.
1. Preparation:
s1: taking out sulfur powder, tuff powder and lime powder according to the volume ratio of 5: 3: 2, mixing, marking as a product A, adding water accounting for 50% of the mass of the product A into the product A, uniformly stirring, adding gypsum accounting for 5% of the mass of the product A at a constant speed, fully stirring to obtain a slurry product, marking as a product B, and granulating the product B, and marking as a product C;
s2: forming two cross-shaped through holes with the diameter of 1-2mm on the product C in the S1;
s3: taking out sponge iron powder, sodium thiosulfate and zeolite powder according to the volume ratio of 6: 3: 1, mixing, marking as a product D, adding water accounting for 60% of the product D in mass into the product D, uniformly stirring, adding 1% of xanthan gum, and obtaining outer-layer material slurry, marking as a product E;
s4: and (3) placing the product C with the holes obtained in the step (S2) into the product E obtained in the step (S3), filling the holes of the product C with the product E, and naturally drying to form particles, wherein the particle size of the particles ranges from 8 mm to 10 mm.
2. The application comprises the following steps:
a certain amount of composite filler and the traditional granular composite filler with the same mass are taken to carry out a nitrogen and phosphorus removal test, and the nitrogen and phosphorus removal capability of the filler is analyzed through comparison.
The test contents are as follows: the test water is discharged from a secondary sedimentation tank of a sewage plant, and the water quality is characterized in that: TN is 15-20mg/L, nitrate nitrogen is 10-15mg/L, and TP is 1.0-2.0 mg/L.
To a 1000mL Erlenmeyer flask, 800mL of test water and 30g of composite filler were added as experimental groups, and 5mL of activated sludge subjected to enrichment culture was added. The conical flask is sealed and put into a shaking table of 100r/min to be shaken, and the temperature is controlled to be 30 +/-1 ℃. 30g of traditional granular filler (sulfur granules, tuff and limestone with volume ratio of 5: 3: 2 and particle size of 8-10mm) are uniformly mixed and put into a 1000mL conical flask as a control group under the same control conditions as the experimental group. TN, nitrate nitrogen and TP were detected every 1 h.
The test result shows that: the removal rate of nitrate nitrogen in the experimental group reaches 7.67 mg.L-1·h-11.8 mg.L higher than the removal rate of the control group-1·h-1(ii) a The total nitrogen removal rate of the experimental group can reach more than 90 percent, which is 15 percent higher than that of the control group; the total phosphorus removal rate of the experimental group can reach more than 90 percent, and is 20 percent higher than that of the control group. Therefore, the total nitrogen and total phosphorus removal capacity of the experimental group is better than that of the control group.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (8)
1. The composite filler for deep nitrogen and phosphorus removal of tail water is characterized in that: contains a main material and an embedded material, wherein the main material comprises sulfur powder, tuff powder and lime powder, and the volume ratio of the sulfur powder to the tuff powder is 5: 3: 2; the embedded material comprises sponge iron powder, sodium thiosulfate and zeolite powder, and the volume ratio of the embedded material to the zeolite powder is 6: 3: 1.
2. a method for preparing the composite filler for the deep nitrogen and phosphorus removal of tail water of claim 1, which is characterized by comprising the following steps:
s1: taking sulfur powder, tuff powder and lime powder according to a certain proportion, mixing, marking as a product A, adding a certain amount of water into the product A, uniformly stirring, adding gypsum with the mass being 5% of that of the product A at a constant speed, fully stirring to obtain a slurry product, marking as a product B, granulating the product B, and marking as a product C;
s2: forming a through hole in the product C in the S1;
s3: mixing sponge iron powder, sodium thiosulfate and zeolite powder according to a certain proportion, marking as a product D, adding a certain amount of water into the product D, uniformly stirring, and then adding 1% xanthan gum to obtain outer layer material slurry, marking as a product E;
s4: and (4) placing the product C with holes obtained in the step (S2) into the product E obtained in the step (S3), filling the hole parts of the product C with the product E, and naturally drying to form particles.
3. The preparation method of the composite filler for the deep nitrogen and phosphorus removal of the tail water according to claim 2 is characterized in that: the mass of water in step S1 was 50% of the mass of product a.
4. The preparation method of the composite filler for the deep nitrogen and phosphorus removal of the tail water according to claim 2 is characterized in that: the particle size of the product C in step S1 is 8-10 mm.
5. The preparation method of the composite filler for the deep nitrogen and phosphorus removal of the tail water according to claim 2 is characterized in that: in step S2, product C is provided with two cross-shaped through holes with a diameter of 1-2 mm.
6. The preparation method of the composite filler for the deep nitrogen and phosphorus removal of the tail water according to claim 2 is characterized in that: the mass of water in step S3 was 60% of the mass of product D.
7. The preparation method of the composite filler for the deep nitrogen and phosphorus removal of the tail water according to claim 2 is characterized in that: the particle size of the particles in step S4 is 8-10 mm.
8. The use of a composite filler for advanced nitrogen and phosphorus removal from tail water, comprising the filler of claim 2, wherein: the particles are used for nitrogen and phosphorus removal of tail water of a sewage plant.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011334903.5A CN112591883B (en) | 2020-11-24 | 2020-11-24 | Composite filler for deep denitrification and dephosphorization of tail water and preparation method thereof |
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| CN202011334903.5A CN112591883B (en) | 2020-11-24 | 2020-11-24 | Composite filler for deep denitrification and dephosphorization of tail water and preparation method thereof |
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| CN112591883A true CN112591883A (en) | 2021-04-02 |
| CN112591883B CN112591883B (en) | 2023-07-21 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399202A (en) * | 2015-12-29 | 2016-03-16 | 北京工业大学 | Method for removing phosphorous based on high-efficiency promotion of spongy iron corrosion in process of nitrogen removal by denitrification |
| CN106186301A (en) * | 2016-07-02 | 2016-12-07 | 北京工业大学 | A kind of preparation method and applications of compounded mix based on recycled water advanced nitrogen dephosphorization |
| CN108793396A (en) * | 2018-01-11 | 2018-11-13 | 北京林业大学 | A kind of denitrification and dephosphorization method of denitrification dephosphorization apparatus, construction method and sewage |
| CN110467276A (en) * | 2019-09-16 | 2019-11-19 | 南京大学 | A kind of preparation and application of sulphur autotrophy and heterotrophic denitrification denitrification organisms filler |
| CN111635072A (en) * | 2020-05-30 | 2020-09-08 | 江苏东恒环境控股有限公司 | Built-in type three-dimensional nitrogen and phosphorus removal composite system |
| US20200338485A1 (en) * | 2019-04-23 | 2020-10-29 | Nanjing University | Method for preparing simultaneous nitrogen and phosphorus removal lightweight material and the use thereof |
-
2020
- 2020-11-24 CN CN202011334903.5A patent/CN112591883B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105399202A (en) * | 2015-12-29 | 2016-03-16 | 北京工业大学 | Method for removing phosphorous based on high-efficiency promotion of spongy iron corrosion in process of nitrogen removal by denitrification |
| CN106186301A (en) * | 2016-07-02 | 2016-12-07 | 北京工业大学 | A kind of preparation method and applications of compounded mix based on recycled water advanced nitrogen dephosphorization |
| CN108793396A (en) * | 2018-01-11 | 2018-11-13 | 北京林业大学 | A kind of denitrification and dephosphorization method of denitrification dephosphorization apparatus, construction method and sewage |
| US20200338485A1 (en) * | 2019-04-23 | 2020-10-29 | Nanjing University | Method for preparing simultaneous nitrogen and phosphorus removal lightweight material and the use thereof |
| CN110467276A (en) * | 2019-09-16 | 2019-11-19 | 南京大学 | A kind of preparation and application of sulphur autotrophy and heterotrophic denitrification denitrification organisms filler |
| CN111635072A (en) * | 2020-05-30 | 2020-09-08 | 江苏东恒环境控股有限公司 | Built-in type three-dimensional nitrogen and phosphorus removal composite system |
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| CN112591883B (en) | 2023-07-21 |
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