CN113149212A - Radial calcium carbonate biological filler, preparation method and application thereof in sewage treatment - Google Patents
Radial calcium carbonate biological filler, preparation method and application thereof in sewage treatment Download PDFInfo
- Publication number
- CN113149212A CN113149212A CN202110435581.1A CN202110435581A CN113149212A CN 113149212 A CN113149212 A CN 113149212A CN 202110435581 A CN202110435581 A CN 202110435581A CN 113149212 A CN113149212 A CN 113149212A
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- Prior art keywords
- radial
- calcium carbonate
- sewage treatment
- filler
- biological filler
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- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 title claims abstract description 124
- 239000000945 filler Substances 0.000 title claims abstract description 71
- 229910000019 calcium carbonate Inorganic materials 0.000 title claims abstract description 62
- 239000010865 sewage Substances 0.000 title claims description 42
- 238000002360 preparation method Methods 0.000 title description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000013078 crystal Substances 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 11
- 239000007864 aqueous solution Substances 0.000 claims description 4
- NKWPZUCBCARRDP-UHFFFAOYSA-L calcium bicarbonate Chemical compound [Ca+2].OC([O-])=O.OC([O-])=O NKWPZUCBCARRDP-UHFFFAOYSA-L 0.000 claims description 4
- 229910000020 calcium bicarbonate Inorganic materials 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 239000010802 sludge Substances 0.000 abstract description 18
- 244000005700 microbiome Species 0.000 abstract description 6
- 238000005273 aeration Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 18
- 229910052757 nitrogen Inorganic materials 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 6
- 229910052698 phosphorus Inorganic materials 0.000 description 6
- 239000011574 phosphorus Substances 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 238000012546 transfer Methods 0.000 description 4
- XKMRRTOUMJRJIA-UHFFFAOYSA-N ammonia nh3 Chemical compound N.N XKMRRTOUMJRJIA-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 239000000725 suspension Substances 0.000 description 3
- 239000002351 wastewater Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000010170 biological method Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000012765 fibrous filler Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 239000002028 Biomass Substances 0.000 description 1
- 241001052560 Thallis Species 0.000 description 1
- 241000589651 Zoogloea Species 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
-
- 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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/308—Biological phosphorus removal
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
Abstract
The invention discloses a radial calcium carbonate biological filler which is a radial calcium carbonate crystal, wherein the radial calcium carbonate crystal comprises radial calcium carbonate branches, the diameter of each radial calcium carbonate branch is 50-2000um, and the number of the radial calcium carbonate branches is 4-100. The radial calcium carbonate biological filler is used as a framework to form granular sludge cenobium, the cenobium is not easy to be dispersed by water flow and aeration, better anaerobic, anoxic and aerobic micro-environments can be formed in the cenobium, an optimal growth micro-environment is provided for various microorganisms, and the capabilities of denitrification, dephosphorization and COD reduction of the bioreactor are effectively improved.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a radial calcium carbonate biological filler, a preparation method and application thereof in sewage treatment.
Background
The biological method is a main method for treating sewage, and pollutants in the sewage are synthesized into microbial thalli and degraded into inorganic substances such as carbon dioxide, water and the like through metabolism of various microorganisms in a bioreactor, so that the sewage is purified finally.
The traditional biological method is mainly an activated sludge method, wherein the activated sludge mainly comprises zooglea, and the zooglea is formed by gathering a large number of bacteria together through extracellular polymers. The zoogloea has aerobic, anoxic and anaerobic micro-environments from outside to inside respectively, provides relatively suitable micro-environments for various microorganisms, and enables the activated sludge process to efficiently degrade pollutants in sewage.
On the basis of the activated sludge process, a biomembrane sewage treatment process is derived. The biological membrane sewage treatment process is to add various biological fillers into a bioreactor to ensure that microorganisms are attached to the surfaces of the biological fillers or in the pores of the biological fillers to form a biological membrane. The biological filler has huge specific surface area and can be retained in the bioreactor for a long time, so that the total amount of organisms in the bioreactor is remarkably increased, and finally, the sewage treatment capacity of the bioreactor is remarkably improved. The actual used biological fillers of the current sewage treatment plant are: suspension ball filler, MBBR fluidized bed filler, polyurethane sponge filler, elastic filler, braid filler, combined filler and the like.
The actual biological fillers used in sewage treatment plants all have more or less problems. If the suspension ball filler and the polyurethane sponge filler are used for a long time, the sludge can completely block the pores in the porous filler, so that the mass transfer efficiency between the inside of the filler and the sewage is greatly reduced, the effective biomass in the bioreactor is reduced, and the sewage treatment effect is also deteriorated. The MBBR fluidized bed filler and the suspension ball filler are easy to deposit in corners of a biochemical pool, so that a filler support net and a flow impeller are generally required to be installed at the bottom of the pool, the transformation cost is high, and the maintenance is difficult. The elastic filler, the braid-type filler and the combined filler are all fibrous fillers with huge specific surface area suspended in the biological pond through a certain supporting material, although the problem that the suspended fillers are easy to deposit is solved, the mounting density of the fillers is limited, and after the biological pond is used for a long time, the fibrous fillers are easily wrapped into a mass by sludge, so that the mass transfer efficiency is reduced. Meanwhile, once the supporting material is damaged, the suspended filler is easy to be wound on other fillers in series, so that the mass transfer efficiency and the sewage treatment effect of the whole biological membrane system are obviously reduced, and the maintenance is difficult.
Disclosure of Invention
The invention aims to: aiming at the existing problems, the invention provides a radial calcium carbonate biological filler, a preparation method and application thereof in sewage treatment.
The technical scheme adopted by the invention is as follows:
a radial calcium carbonate biological filler is calcium carbonate crystals in a radial shape, wherein the radial calcium carbonate crystals comprise radial calcium carbonate branches, the diameter of each radial calcium carbonate branch is 50-2000um, and the number of the radial calcium carbonate branches is 4-100.
Preferably, the number of radial calcium carbonate branches is between 25 and 75.
Preferably, the method comprises the following steps: preparing a calcium bicarbonate aqueous solution with the concentration of 50mg/L at the water temperature of 10 ℃, then quickly heating the prepared calcium bicarbonate aqueous solution (the whole heating process does not exceed 3 minutes) to 100 ℃, and maintaining for two minutes to obtain the radial calcium carbonate biological filler.
The application of the radial calcium carbonate biological filler in sewage treatment.
Preferably, the adding proportion of the radial calcium carbonate biological filler in the biological reaction tank of the sewage treatment plant is 0.01-10Kg/m3。
Preferably, the adding proportion of the radial calcium carbonate biological filler in the biological reaction tank of the sewage treatment plant is 3-6Kg/m3。
Compared with the prior art, the invention has the beneficial effects that:
the invention has the advantages that the radial calcium carbonate biological filler is very fine, the diameter is only 50-2000um, even if a large number of microorganisms are adsorbed on the surface of the filler, the filler can be suspended in the biological reaction along with water flow and aeration, and the mass transfer efficiency between sewage and a biological membrane is extremely high. The radial calcium carbonate biological filler is used as a framework to form granular sludge cenobium, the cenobium is not easy to be dispersed by water flow and aeration, better anaerobic, anoxic and aerobic micro-environments can be formed in the cenobium, an optimal growth micro-environment is provided for various microorganisms, and the capabilities of denitrification, dephosphorization and COD reduction of the bioreactor are effectively improved. Because the density of calcium carbonate is higher than that of water, and the radial calcium carbonate biological filler is used as a framework, the sedimentation performance of the formed granular sludge bacterial mass is much higher than that of the traditional activated sludge, so that the sludge-water separation effect of the secondary sedimentation tank is better, the sludge concentration in the bioreactor can be kept higher, and the sludge yield is obviously reduced. The radial calcium carbonate biological filler provided by the invention can be directly added into a bioreactor of a sewage treatment plant without other modification, and is convenient to use.
Drawings
FIG. 1 is a radial calcium carbonate biofilm filler of the present invention.
Labeled as: 1-radial calcium carbonate branching.
Detailed Description
The present invention will be described in further detail in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
Example 1
The radial calcium carbonate biological filler is applied to A2O sewage treatment process. The sewage treatment capacity of the A2O sewage treatment device for experiments is 5 tons/day, the sewage is synthetic wastewater, the COD is 400mg/L, the ammonia nitrogen is 40mg/L, the total phosphorus is 3mg/L, and the water temperature is 20 ℃. The A2O sewage treatment device runs for three months before and after the radial calcium carbonate biological filler is added, and the adding amount of the radial calcium carbonate biological filler is 100mg/L (calculated by the effective volume of the biochemical tank). Before adding the radial calcium carbonate biological filler, MLSS is 3000mg/L, SVI is 120ml/g, COD removal rate is 90%, total nitrogen removal rate is 65%, and total phosphorus removal rate is 87%. After the radial calcium carbonate biological filler is added, the SVI of the sludge is reduced to 110ml/g, and the total nitrogen removal rate is increased to 67%. The experimental result shows that the sludge sedimentation performance can be effectively improved and the total nitrogen removal rate can be improved by adding a small amount of radial calcium carbonate biological filler.
Example 2
The radial calcium carbonate biological filler is applied to A2O sewage treatment process. The sewage treatment capacity of the A2O sewage treatment device for experiments is 5 tons/day, the sewage is synthetic wastewater, the COD is 400mg/L, the ammonia nitrogen is 40mg/L, the total phosphorus is 3mg/L, and the water temperature is 20 ℃. The A2O sewage treatment device runs for three months before and after the radial calcium carbonate biological filler is added, and the adding amount of the radial calcium carbonate biological filler is 500mg/L (calculated by the effective volume of the biochemical tank). Before adding the radial calcium carbonate biological filler, MLSS is 3000mg/L, SVI is 120ml/g, COD removal rate is 90%, total nitrogen removal rate is 65%, and total phosphorus removal rate is 87%. After the radial calcium carbonate biological filler is added, the sludge SVI is reduced to 90ml/g, the total nitrogen removal rate is increased to 69%, and the COD removal rate is increased to 93%. The experimental result shows that proper addition of the radial calcium carbonate biological filler can effectively improve the sludge settling property, the total nitrogen removal rate and the COD removal rate.
Example 3
The radial calcium carbonate biological filler is applied to A2O sewage treatment process. The sewage treatment capacity of the A2O sewage treatment device for experiments is 5 tons/day, the sewage is synthetic wastewater, the COD is 400mg/L, the ammonia nitrogen is 40mg/L, the total phosphorus is 3mg/L, and the water temperature is 20 ℃. The A2O sewage treatment device runs for three months before and after the radial calcium carbonate biological filler is added, and the adding amount of the radial calcium carbonate biological filler is 1000mg/L (calculated by the effective volume of the biochemical tank). Before adding the radial calcium carbonate biological filler, MLSS is 3000mg/L, SVI is 120ml/g, COD removal rate is 90%, total nitrogen removal rate is 65%, and total phosphorus removal rate is 87%. After the radial calcium carbonate biological filler is added, the SVI of the sludge is reduced to 75ml/g, the total nitrogen removal rate is increased to 67 percent, and the COD removal rate is increased to 95 percent. Experimental results show that the sludge sedimentation performance can be effectively improved by adding a large amount of radial calcium carbonate biological filler, the total nitrogen removal rate is improved, and the COD removal rate is improved.
The above-mentioned embodiments only express the specific embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for those skilled in the art, without departing from the technical idea of the present application, several changes and modifications can be made, which are all within the protection scope of the present application.
Claims (6)
1. A radial calcium carbonate biological filler is characterized in that the biological filler is radial calcium carbonate crystals, the radial calcium carbonate crystals comprise radial calcium carbonate branches, the diameter of each radial calcium carbonate branch is 50-2000um, and the number of the radial calcium carbonate branches is 4-100.
2. The radial calcium carbonate biofilm carrier of claim 1, wherein said radial calcium carbonate branches comprise between about 25 and about 75 branches.
3. The method for preparing a radial calcium carbonate biological filler according to claim 1 or 2, which is characterized by comprising the following steps: preparing a calcium bicarbonate aqueous solution with the concentration of 50mg/L at the water temperature of 10 ℃, then quickly heating the prepared calcium bicarbonate aqueous solution (the whole heating process does not exceed 3 minutes) to 100 ℃, and maintaining for two minutes to obtain the radial calcium carbonate biological filler.
4. Use of a radial calcium carbonate biofilm filler as defined in any one of claims 1 to 3 in sewage treatment.
5. The use of the radial calcium carbonate biological filler in sewage treatment according to claim 4, wherein the radial calcium carbonate biological filler is added into a biological reaction tank of a sewage treatment plant at a ratio of 0.01-10Kg/m3。
6. The use of the radial calcium carbonate biological filler in sewage treatment according to claim 5, wherein the radial calcium carbonate biological filler is added into a biological reaction tank of a sewage treatment plant at a ratio of 3-6Kg/m3。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110435581.1A CN113149212A (en) | 2021-04-22 | 2021-04-22 | Radial calcium carbonate biological filler, preparation method and application thereof in sewage treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110435581.1A CN113149212A (en) | 2021-04-22 | 2021-04-22 | Radial calcium carbonate biological filler, preparation method and application thereof in sewage treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113149212A true CN113149212A (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110435581.1A Pending CN113149212A (en) | 2021-04-22 | 2021-04-22 | Radial calcium carbonate biological filler, preparation method and application thereof in sewage treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113149212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113264597A (en) * | 2021-04-22 | 2021-08-17 | 四川绵阳岷山实业集团有限公司 | Method for inhibiting scale by using calcium carbonate aragonite seed crystals |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07196314A (en) * | 1993-12-28 | 1995-08-01 | Maruo Calcium Co Ltd | Tubular synthetic inorganic fine particle |
| JPH07196305A (en) * | 1993-12-28 | 1995-08-01 | Maruo Calcium Co Ltd | Synthetic inorganic fine particle of tubular composite |
| WO2010097449A1 (en) * | 2009-02-27 | 2010-09-02 | Shell Internationale Research Maatschappij B.V. | A process for carbon dioxide sequestration |
| CN103787498A (en) * | 2013-11-03 | 2014-05-14 | 北京工业大学 | Rapid starting method of low-temperature low C/N sewage improvement A2/O process |
| CN109667189A (en) * | 2017-10-13 | 2019-04-23 | 东升新材料（山东）有限公司 | A kind of preparation method of chrysanthemum shape precipitated calcium carbonate filler |
-
2021
- 2021-04-22 CN CN202110435581.1A patent/CN113149212A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07196314A (en) * | 1993-12-28 | 1995-08-01 | Maruo Calcium Co Ltd | Tubular synthetic inorganic fine particle |
| JPH07196305A (en) * | 1993-12-28 | 1995-08-01 | Maruo Calcium Co Ltd | Synthetic inorganic fine particle of tubular composite |
| WO2010097449A1 (en) * | 2009-02-27 | 2010-09-02 | Shell Internationale Research Maatschappij B.V. | A process for carbon dioxide sequestration |
| CN103787498A (en) * | 2013-11-03 | 2014-05-14 | 北京工业大学 | Rapid starting method of low-temperature low C/N sewage improvement A2/O process |
| CN109667189A (en) * | 2017-10-13 | 2019-04-23 | 东升新材料（山东）有限公司 | A kind of preparation method of chrysanthemum shape precipitated calcium carbonate filler |
Non-Patent Citations (1)
| Title |
|---|
| 闫长领 等: ""高纯度高长径比CaCO3晶须的制备"", 《应用化学》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113264597A (en) * | 2021-04-22 | 2021-08-17 | 四川绵阳岷山实业集团有限公司 | Method for inhibiting scale by using calcium carbonate aragonite seed crystals |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210723 |
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