CN114477398A - Method for strengthening coagulation denitrification of black and odorous water body by GCS compound material - Google Patents
Method for strengthening coagulation denitrification of black and odorous water body by GCS compound material Download PDFInfo
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- CN114477398A CN114477398A CN202210111991.5A CN202210111991A CN114477398A CN 114477398 A CN114477398 A CN 114477398A CN 202210111991 A CN202210111991 A CN 202210111991A CN 114477398 A CN114477398 A CN 114477398A
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- gcs
- black
- iron
- compound material
- aluminum
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5236—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
-
- 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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
-
- 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
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- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a method for strengthening coagulation denitrification of black and odorous water body by using a GCS compound material. The GCS compound material is prepared by compounding GCS prepared by lamellar silicate minerals, magnetic powder and hydrated lime, and combining an iron-aluminum coagulant and a coagulant aid PAM, improves the ammonia nitrogen removal rate by strengthening the coagulation process of black and odorous water, and simultaneously obtains recyclable sludge rich in nitrogen and phosphorus organic matters. The invention has the outstanding characteristics that: the GCS raw material has wide source and low preparation cost; the method for strengthening coagulation denitrification of black and odorous water by combining the iron-aluminum coagulant and the coagulant aid PAM is quick, simple, easy to operate and small in occupied area; the ammonia nitrogen removal rate can reach more than 70%.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to a method for strengthening coagulation denitrification of black and odorous water body by using a GCS (GCS compounded material).
Background
The magnetic coagulation technology is widely applied to the treatment of wastewater by virtue of the rapid sedimentation and higher performance of removing total phosphorus and COD of suspended matters. The removal efficiency of the technology to ammonia nitrogen is only 15-23%. The black and odorous water body is mainly polluted water containing high nitrogen and phosphorus COD, which is formed by anaerobic decomposition of organic matters after receiving a large amount of domestic sewage, the ammonia nitrogen content is from several ppm to several hundred ppm, which far exceeds the surface IV water quality standard, the COD total phosphorus suspended solids after magnetic coagulation treatment can usually meet the discharge requirement, but the ammonia nitrogen can not reach the standard.
At present, an efficient coagulation denitrification method for black and odorous wastewater is lacked.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a material which is prepared by compounding layered silicate minerals, magnetic powder and hydrated lime and is used for strengthening the coagulation denitrification of wastewater, and a method for realizing the standard discharge of COD (chemical oxygen demand) nitrogen and phosphorus in black and odorous water by combining an iron-aluminum coagulant and a coagulant aid PAM (polyacrylamide).
The technical scheme adopted by the invention for solving the technical problems is as follows:
a method for strengthening coagulation denitrification of black and odorous water body by GCS compound material comprises the following steps:
(1) preparing a GCS compound material:
the GCS compound material is prepared by compounding phyllosilicate mineral, magnetic powder and hydrated lime;
(2) sequentially adding the iron-aluminum coagulant, the GCS and the PAM into the black and odorous water body;
(3) discharging the mixed solution into a sedimentation tank or a clarification tank for coagulating sedimentation;
(4) discharging supernatant, scattering water-containing sludge, recovering magnetic powder, and discharging excess sludge.
Further, in the step (1), the phyllosilicate mineral includes serpentine, montmorillonite or illite.
Further, in the step (1), the phyllosilicate mineral is a magnesium-rich phyllosilicate mineral, and includes serpentine or montmorillonite.
Further, in the step (1), the mass percentages of the phyllosilicate mineral, the magnetic powder and the hydrated lime are respectively 30-70%, 20-60% and 1-20%.
Further, in the step (2), the iron-aluminum coagulant is a coagulant containing iron salt and aluminum salt.
Still further, the iron salt comprises poly-iron and the aluminum salt comprises poly-aluminum.
Further, the adding concentration of the iron-aluminum coagulant is 50-250mg/L and the stirring time is 0.5-3 min.
Further, in the step (2), the mass ratio of the iron-aluminum coagulant to the GCS compound material is 1: 5-1: 20.
Further, in the step (2), the adding concentration of PAM is 0.5-1.5mg/L and the stirring time is 2-5min based on black smelly water.
Further, in the step (3), the coagulating sedimentation time is 15-30 min.
Compared with the prior art, the invention has the following beneficial effects:
(1) the GCS has wide raw material source and low preparation cost;
(2) the GCS formed by compounding the layered silicate mineral, the magnetic powder and the hydrated lime enhances the adsorption of ammonia nitrogen through the hydrolytic flocculation of a reinforced flocculating agent, further enhances the removal of the ammonia nitrogen through the strong adsorption effect of cation exchange or magnesium-rich sites on the ammonia nitrogen and phosphate radicals, accelerates the heterogeneous nucleation and coagulation process by taking the magnetic powder as a crystal seed, and finally enhances the removal of the ammonia nitrogen through the synergistic effect of all the components.
(3) The method for strengthening coagulation denitrification of black and odorous water by combining the iron-aluminum coagulant and the coagulant aid PAM is quick, simple, easy to operate and small in occupied area; the ammonia nitrogen removal rate can reach more than 70%.
Detailed Description
The specific process specifications of each process of the invention are reviewed as follows:
(1) the GCS compound material is prepared by compounding and grinding 30-70% of phyllosilicate mineral, 20-60% of magnetic powder and 1-20% of hydrated lime according to the mass percentage respectively.
(2) Sequentially adding the iron-aluminum coagulant, the GCS and the PAM into the black and odorous water body.
The iron-aluminum coagulant is added into the black and odorous water body according to the concentration of 50-250mg/L, and solid is directly added or concentrated solution is prepared for adding, and the latter has better effect. Quickly stirring for 0.5-3min after adding to fully dissolve and uniformly mix.
The GCS compound material is added into the black and odorous water body in a controlled manner according to the mass ratio of the iron-aluminum coagulant to the GCS of 1: 5-1: 20, and stirred for 2-5min to be fully dissolved and uniformly mixed.
PAM is prepared into 1 per mill with the concentration of 0.5-1.5mg/L and is added into the black and odorous water body to be stirred for 2-5 min.
(3) Discharging the mixed solution into a sedimentation tank or a clarification tank for coagulating sedimentation for 15-30 min.
(4) Discharging supernatant, scattering water-containing sludge, recovering magnetic powder, and dehydrating the discharged excess sludge by using a filter press for recycling.
The salient features and significant improvements of the present invention are further clarified by the following examples, which are intended to be illustrative only and not limiting in any way.
Example 1
Taking 1000mL of black and odorous water containing 4500mg/L, TN 150mg/L, TP 15mg/L COD and 25mg/L ammonia nitrogen; adding 80mg of polyferric, and quickly stirring for 30s to uniformly mix; then adding 1.5g of GCS powder, and stirring for 4 min; adding PAM1.0mg, stirring for 2-5min, and separating precipitate for 15 min; the supernatant was colorless and free of turbidity, and had a COD removal rate of 97%, a TP removal rate of 98.7%, a TN removal rate of 84%, and an ammonia nitrogen removal rate of 76%. The magnetic powder is recovered after the sludge is scattered, and the recovery rate of the magnetic powder is 96 percent. And coagulating and precipitating the polyferric oxide, the magnetic powder and the PAM with the same amount to obtain supernatant with ammonia nitrogen of 21 mg/L.
The GCS compound material in the embodiment is prepared by compounding the following substances in percentage by mass: 30 to 70 percent of potassium-rich illite powder, 20 to 60 percent of magnetic powder and 1 to 20 percent of hydrated lime.
Example 2
Taking 10L of black and odorous water containing 3600mg/L, TP13 COD, 13mg/L and 20mg/L ammonia nitrogen; adding 1.0g of polyferric, and quickly stirring for 3min to fully dissolve and uniformly mix; adding GCS powder 5g, and stirring for 2-5 min; adding PAM 15mg, stirring for 2-5min, and separating for 25 min; the supernatant was colorless and free of turbidity, and had a COD removal rate of 95.7%, a TP removal rate of 97.8%, and an ammonia nitrogen removal rate of 73%. The magnetic powder is recovered after the sludge is scattered, and the recovery rate of the magnetic powder is 98.2 percent. 17.8mg/L of ammonia nitrogen in the supernatant after coagulating sedimentation of the polyferric oxide, the magnetic powder and the PAM with the same amount is used.
The GCS compound material in the embodiment is prepared by compounding the following substances in percentage by mass: 30 to 70 percent of serpentine powder, 20 to 60 percent of magnetic powder and 1 to 20 percent of hydrated lime.
Example 3
Taking 5L of black and odorous water containing 270mg/L, TP 7mg/L COD and 8mg/L ammonia nitrogen; adding 0.25g of polyferric, and quickly stirring for 3min to fully dissolve and mix uniformly; adding GCS powder 2.5g, and stirring for 2-5 min; adding PAM 4.0mg, stirring for 2-5min, and separating for 25 min; the supernatant was colorless and free of turbidity, and had a COD removal rate of 96.6%, a TP removal rate of 98.1% and an ammonia nitrogen removal rate of 85%. The magnetic powder is recovered after the sludge is scattered, and the recovery rate of the magnetic powder is 102 percent.
The GCS compound material in the embodiment is prepared by compounding the following substances in percentage by mass: 30 to 70 percent of magnesium-rich montmorillonite powder, 20 to 60 percent of magnetic powder and 1 to 20 percent of hydrated lime.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any modification, equivalent replacement, and improvement made by those skilled in the art within the technical scope of the present invention should be included in the scope of the present invention.
Claims (10)
1. A method for strengthening coagulation denitrification of black and odorous water body by using GCS compound material is characterized by comprising the following steps:
(1) preparing a GCS compound material:
the GCS compound material is prepared by compounding phyllosilicate mineral, magnetic powder and hydrated lime;
(2) sequentially adding the iron-aluminum coagulant, the GCS and the PAM into the black and odorous water body;
(3) discharging the mixed solution into a sedimentation tank or a clarification tank for coagulating sedimentation;
(4) discharging supernatant, scattering water-containing sludge, recovering magnetic powder, and discharging excess sludge.
2. The method of claim 1, wherein: in the step (1), the phyllosilicate mineral includes serpentine, montmorillonite or illite.
3. The method of claim 2, wherein: in the step (1), the phyllosilicate mineral is a magnesium-rich phyllosilicate mineral and comprises serpentine or montmorillonite.
4. The method of claim 1, wherein: in the step (1), the mass percentages of the phyllosilicate mineral, the magnetic powder and the hydrated lime are respectively 30-70%, 20-60% and 1-20%.
5. The method of claim 1, wherein: in the step (2), the iron-aluminum coagulant is a coagulant containing iron salt and aluminum salt.
6. The method of claim 4, wherein: the iron salt comprises poly-iron and the aluminum salt comprises poly-aluminum.
7. The method of claim 1, wherein: the adding concentration of the iron-aluminum coagulant is 50-250mg/L by black smelly water, and the stirring time is 0.5-3 min.
8. The method of claim 1, wherein: in the step (2), the mass ratio of the iron-aluminum coagulant to the GCS compound material is 1: 5-1: 20.
9. The method of claim 1, wherein: in the step (2), the adding concentration of PAM is 0.5-1.5mg/L and the stirring time is 2-5 min.
10. The method of claim 1, wherein: in the step (3), the coagulating sedimentation time is 15-30 min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210111991.5A CN114477398A (en) | 2022-01-29 | 2022-01-29 | Method for strengthening coagulation denitrification of black and odorous water body by GCS compound material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210111991.5A CN114477398A (en) | 2022-01-29 | 2022-01-29 | Method for strengthening coagulation denitrification of black and odorous water body by GCS compound material |
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| CN114477398A true CN114477398A (en) | 2022-05-13 |
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| CN202210111991.5A Withdrawn CN114477398A (en) | 2022-01-29 | 2022-01-29 | Method for strengthening coagulation denitrification of black and odorous water body by GCS compound material |
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| CN103304016A (en) * | 2013-06-28 | 2013-09-18 | 常州大学 | Method for preparing hybrid flocculant by use of attapulgite |
| US20140175015A1 (en) * | 2011-06-20 | 2014-06-26 | Fujifilm Corporation | Water purification method |
| CN108996636A (en) * | 2018-08-01 | 2018-12-14 | 福州大学 | A kind of preparation method of poly- silicon Magnetic Bentonite flocculant |
| CN110510800A (en) * | 2019-09-06 | 2019-11-29 | 上海同澜生态环境科技有限公司 | A kind of magnetic-coagulation precipitating sewage disposal device and sewage water treatment method |
| CN110642343A (en) * | 2019-11-08 | 2020-01-03 | 北京林业大学 | Preparation and application of magnetic flocculant for removing suspended particles in water |
| CN111995155A (en) * | 2019-05-27 | 2020-11-27 | 宝山钢铁股份有限公司 | Method for recycling ammoniacal nitrogen-containing acidic wastewater |
| CN112062384A (en) * | 2020-09-24 | 2020-12-11 | 北京工业大学 | Magnetic zeolite coupling magnetic coagulation process |
| CN112794416A (en) * | 2021-01-07 | 2021-05-14 | 湘潭大学 | Flocculation-adsorption reagent and method for synchronously removing turbidity, ammonia nitrogen and TP in black and odorous water body |
-
2022
- 2022-01-29 CN CN202210111991.5A patent/CN114477398A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140175015A1 (en) * | 2011-06-20 | 2014-06-26 | Fujifilm Corporation | Water purification method |
| CN103304016A (en) * | 2013-06-28 | 2013-09-18 | 常州大学 | Method for preparing hybrid flocculant by use of attapulgite |
| CN108996636A (en) * | 2018-08-01 | 2018-12-14 | 福州大学 | A kind of preparation method of poly- silicon Magnetic Bentonite flocculant |
| CN111995155A (en) * | 2019-05-27 | 2020-11-27 | 宝山钢铁股份有限公司 | Method for recycling ammoniacal nitrogen-containing acidic wastewater |
| CN110510800A (en) * | 2019-09-06 | 2019-11-29 | 上海同澜生态环境科技有限公司 | A kind of magnetic-coagulation precipitating sewage disposal device and sewage water treatment method |
| CN110642343A (en) * | 2019-11-08 | 2020-01-03 | 北京林业大学 | Preparation and application of magnetic flocculant for removing suspended particles in water |
| CN112062384A (en) * | 2020-09-24 | 2020-12-11 | 北京工业大学 | Magnetic zeolite coupling magnetic coagulation process |
| CN112794416A (en) * | 2021-01-07 | 2021-05-14 | 湘潭大学 | Flocculation-adsorption reagent and method for synchronously removing turbidity, ammonia nitrogen and TP in black and odorous water body |
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Application publication date: 20220513 |