CN106277458A - Reduce ammonia nitrogen, total phosphorus and the processing method of COD content in sulfate process titanium dioxide waste water - Google Patents
Reduce ammonia nitrogen, total phosphorus and the processing method of COD content in sulfate process titanium dioxide waste water Download PDFInfo
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/722—Oxidation by peroxides
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
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- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/76—Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
- C02F1/763—Devices for the addition of such compounds in gaseous form
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/14—NH3-N
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- 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
- C02F2305/02—Specific form of oxidant
- C02F2305/026—Fenton's reagent
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Abstract
The present invention relates to a kind of reduce ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, it is characterized in that, described method is as follows: pressure filter filter pressing of 1) learning from else's experience, waste water obtained by preliminary purification, detection pH value and ferrous content, by add acid or alkali, adjust control PH 6 ~ 9, ferrous iron content≤1g/L；2) after processing through step 1) adjustment in the waste water of gained, add hydrogen peroxide and the mixed solution (Fenton reagent) of ferrous ion, add rear mixing time and keep 10 ~ 30 seconds, it is ensured that react completely；3) will be through step 2) adjustment process after gained waste water in add chlorine or sodium hypochlorite, add rear mixing time 5 ~ 15 seconds, it is ensured that react completely；4) by the waste water after step 3) processes, adjust PH to 6 ~ 9 with alkaline matter, and process through Filter Press, obtain pollutant load and meet the clear water of environmental requirement, qualified discharge.
Description
Technical field
The present invention relates to a kind of processing method, be specifically related to ammonia nitrogen, total phosphorus and COD in a kind of reduction sulfate process titanium dioxide waste water
The processing method of content, belongs to wastewater treating technology field.
Background technology
In the production process of sulfuric acid method titanium pigment, the substantial amounts of waste water containing pollutant such as ammonia nitrogens can be produced, if do not entered
Row is effectively administered, it will the environment of surrounding is produced the biggest harm, and therefore waste water treatment is sulfuric acid method titanium pigment production process
In, a very important operation, along with the release of the new environmental law of country in, clearly environmental conservation is included country's fundamental state policy,
It is aided with the sustainable development that multinomial system is ecological environment to escort, in terms of waste water process, those skilled in the art
Member's never good solution.
Summary of the invention
The present invention is just for technical problem present in prior art, it is provided that a kind of reduce ammonia in sulfate process titanium dioxide waste water
Nitrogen, total phosphorus and the processing method of COD content, this technical scheme makes the nuisances such as ammonia nitrogen, COD and the total phosphorus in waste water by improvement
The index of matter reaches regulated discharge standard, thus effectively reduces pollution, fully implements the guilding principle of sanitation and hygiene, meets and can hold
The needs of supervention exhibition, also make a due contribution for protection environment.The present invention carries out sulfate process titanium dioxide Pollutants in Wastewater
Study on degradation, and the harmful substance in waste water is formed, regulation effect is affected by the change of pH value, and the addition side of inorganic agent
The influence factor such as formula, dosage are studied, it is achieved in efflux wastewater, the index of the harmful substance such as ammonia nitrogen, COD and total phosphorus reaches rule
Determine discharge standard, thus effectively reduce pollution, protect environment.
To achieve these goals, technical scheme is as follows, a kind of ammonia nitrogen in sulfate process titanium dioxide waste water, total of reducing
Phosphorus and the processing method of COD content, it is characterised in that described method is as follows: pressure filter filter pressing of 1) learning from else's experience, preliminary purification gained
The waste water arrived, detection pH value and ferrous content, by adding acid or alkali, acid can be the sulphuric acid of about 10% with concentration,
Alkali can be the sodium hydroxide etc. of about 10% with concentration, adjust control PH 6 ~ 9, ferrous iron content≤1g/L；
2), after processing through step 1) adjustment in the waste water of gained, the mixed solution adding hydrogen peroxide and ferrous ion is (fragrant
Pause reagent), add rear mixing time and keep 10 ~ 30 seconds, it is ensured that react completely；
3) will be through step 2) adjustment process after gained waste water in add chlorine or sodium hypochlorite, add rear mixing time 5 ~ 15
Second, it is ensured that the most anti-；
4) by the waste water after step 3) processes, adjust PH to 6 ~ 9 with alkaline matter, and process through Filter Press, obtain dirt
Dye thing content meets the clear water of environmental requirement, qualified discharge.Fenton process is used to remove total phosphorus, COD, and break point chlorination first
Removing ammonia nitrogen, the mode combined removes the pollutant in sulfate process titanium dioxide waste water.By controlling reagent addition sequence, addition
With key parameters such as response time, reach effectively to remove the purpose of ammonia nitrogen, total phosphorus, COD.
As a modification of the present invention, step 2) in the dosage of hydrogen peroxide divide with the quality of hydrogen peroxide/wastewater flow rate
Number meter, the dosage of hydrogen peroxide is 0.45～1 ‰, and the dosage of ferrous ion is with the mass fraction of ferrous ion/wastewater flow rate
Meter, the dosage of ferrous ion is 0.60～1.5 ‰.
As a modification of the present invention, described step 3) adds chlorine or sodium hypochlorite, wherein free chlorine contents with
The mass fraction meter of free chlorine/wastewater flow rate, free chlorine dosage is 0.05～0.2 ‰.
As a modification of the present invention, the alkaline matter in described step 4) is sodium hydroxide, calcium hydroxide or hydrogen-oxygen
Change potassium one, the dosage of alkaline matter in terms of the mass fraction of OH/wastewater flow rate, the dosage of alkaline matter be 0.5～
1.2‰。
Relative to prior art, the invention have the advantages that, the present solution provides one and utilize break point chlorination
The pollutant such as ammonia nitrogen, total phosphorus and the COD in the combination treatment method combined with Fenton process, effectively reduction sulfate process titanium dioxide waste water
Content, through the method process titanium dioxide wastewater ammonia nitrogen index content≤10mg/L, COD content≤60mg/L, total phosphorus content≤
0.5mg/L, fully meets discharge of wastewater environmental requirement, thus effectively reduces pollution, protects environment；This technical scheme is by controlling
The PH of sulfate process titanium dioxide waste water and ferrous iron content；The dosage of the mixed solution of hydrogen peroxide and ferrous ion wants appropriate；Control
Mixing time processed guarantees reaction completely, and (free chlorine comes from chlorine or hypochlorous acid for the dosage of control free chlorine and mixing time
Sodium), finally adjust PH to about neutrality with alkaline matter, after filtration, arrange outside clear water；Fenton process reagent is added by this technical scheme simultaneously
Enter, operate simpler convenience, it is easy to control, consider Fenton reagent and break point chlorination reagent mutual affect because of
Element, optimizes charging sequence and response time, thus reaches the advantage that degrading waste water pollutant ability is strong, efficiency is high, after being conducive to
Phase processes, and reaches national wastewater discharge standard, applied range, wide market.
Detailed description of the invention:
In order to deepen the understanding of the present invention, below in conjunction with embodiment, the present invention is described in detail.
Embodiment 1:
A kind of reducing ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, described method is as follows:
1) through pressure filter filter pressing, obtaining the waste water after preliminary purification, measuring pH value is 7.2, and ferrous iron content is 0.24g/L；
2) in step 1) waste water, enter the mixed solution (Fenton reagent) of hydrogen peroxide and ferrous ion, the dosage of hydrogen peroxide
It is 0. 5
‰, the dosage of ferrous ion is 0.7 ‰.Add rear mixing time to keep 10 seconds；
3) through step 22) Fenton process after gained waste water in add sodium hypochlorite, free chlorine dosage is 0.07 ‰, after adding
During stirring
Between 5 seconds；
4) sodium hydroxide of the waste water after step 3) being processed adjusts PH to 7.1, and dosage is 0.5 ‰, and waste water is through filter press
After filtration,
Clear water outside obtaining, detect the indexs such as ammonia nitrogen, total phosphorus and COD and be respectively 5.1,0.3,43.
Embodiment 2:
A kind of reducing ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, described method is as follows:
1) after pressure filter filter pressing, obtaining the waste water of preliminary purification, measuring pH value is 8.1, and ferrous iron content is 0.14g/L；
2) add hydrogen peroxide and the mixed solution (Fenton reagent) of ferrous ion, adding of hydrogen peroxide in step 1) waste water
Amount is 0. 7
‰, the dosage of ferrous ion is 0.9 ‰.Add rear mixing time to keep 15 seconds；
3) through step 2) Fenton process after gained waste water in add sodium hypochlorite, free chlorine dosage is 0.1 ‰, after adding stir
10 seconds time；
4) sodium hydroxide of the waste water after step 3) being processed adjusts PH to 6.9, and dosage is 0.7 ‰, filters through filter press
Process,
Clear water to outward, detecting the indexs such as ammonia nitrogen, total phosphorus and COD is 4.2,0.23,38.
Embodiment 3:
A kind of reducing ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, described method is as follows:
1) through pressure filter filter pressing, obtaining the waste water of preliminary purification, measuring pH value is 6.7, and ferrous iron content is 0.84g/L；
2) add hydrogen peroxide and the mixed solution (Fenton reagent) of ferrous ion, adding of hydrogen peroxide in step 1) waste water
Amount is 0. 8
‰, the dosage of ferrous ion is 1.2 ‰.Add rear mixing time to keep 20 seconds；
3) through step 2) Fenton process after gained waste water in, add sodium hypochlorite, free chlorine dosage is 0.12 ‰, stirs after adding
Mix the time
5 seconds；
4) waste water after step 3) being processed, adjusts PH to 7.1 with sodium hydroxide, and dosage is 0., 9 ‰, through filter press mistake
Filter processes,
Clearing water outside obtaining, detecting the indexs such as ammonia nitrogen, total phosphorus and COD is 3.9,0.21,39.
Embodiment 4:
A kind of reducing ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, described method is as follows:
1) through pressure filter filter pressing, obtaining the waste water of preliminary purification, measuring pH value is 7.7, and ferrous iron content is 0.28g/L；
2) add hydrogen peroxide and the mixed solution (Fenton reagent) of ferrous ion, adding of hydrogen peroxide in step 1) waste water
Amount is 0. 7
‰, the dosage of ferrous ion is 1.0 ‰.Add rear mixing time to keep 25 seconds；
3) through step 2) Fenton process after gained waste water in add sodium hypochlorite, free chlorine dosage is 0.15 ‰, stirs after adding
Mix the time 10 seconds；
4) sodium hydroxide of the waste water after step 3) two-step pretreatment being adjusted PH to 7.9, dosage is 1.0 ‰, through filter press
Filtration treatment
, clear water outside obtaining, detecting the indexs such as ammonia nitrogen, total phosphorus and COD is 4.9,0.18,35.
Embodiment 5:
A kind of reducing ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, described method is as follows:
1) through pressure filter filter pressing, obtaining the waste water of preliminary purification, measuring pH value is 8.7, and ferrous iron content is 0.09g/L；
2) add hydrogen peroxide and the mixed solution (Fenton reagent) of ferrous ion, adding of hydrogen peroxide in step a waste water
Amount is 0. 6
‰, the dosage of ferrous ion is 0.9 ‰.Add rear mixing time to keep 15 seconds；
3) through step 2) Fenton process after gained waste water in add sodium hypochlorite, free chlorine dosage is 0.18 ‰, stirs after adding
Mix the time 10 seconds；
4) sodium hydroxide of the waste water after step 3) being processed adjusts PH to 8.2, and dosage is 1.2 ‰, filters through filter press
Process,
Clear water to outward, detecting the indexs such as ammonia nitrogen, total phosphorus and COD is 4.5,0.22,33.
Embodiment 6:
A kind of reducing ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, described method is as follows:
1) through pressure filter filter pressing, obtaining the waste water of preliminary purification, measuring pH value is 7.9, and ferrous iron content is 0.15g/L；
2) add hydrogen peroxide and the mixed solution (Fenton reagent) of ferrous ion, adding of hydrogen peroxide in step 1) waste water
Amount is 0. 6
‰, the dosage of ferrous ion is 1.2 ‰.Add rear mixing time to keep 30 seconds；
3) through step 2) Fenton process after gained waste water in add sodium hypochlorite, free chlorine dosage is 0.14 ‰, stirs after adding
Mix the time 15 seconds,
4) sodium hydroxide of the waste water after step 3) being processed adjusts PH to 7.6, and dosage is 0., 8 ‰, filters through filter press
Process,
Clearing water outside obtaining, detecting the indexs such as ammonia nitrogen, total phosphorus and COD is 5.2,0.26,45.
It should be noted that above-described embodiment, be not used for limiting protection scope of the present invention, in technique scheme
Equivalents or replacement done by the basis of each fall within the scope that the claims in the present invention are protected.
Claims (4)
1. one kind is reduced ammonia nitrogen in sulfate process titanium dioxide waste water, total phosphorus and the processing method of COD content, it is characterised in that described side
Method is as follows: pressure filter filter pressing of 1) learning from else's experience, the waste water obtained by preliminary purification, and detection pH value and ferrous content, by adding
Enter acid or alkali, adjust and control PH 6 ~ 9, ferrous iron content≤1g/L；
2), after processing through step 1) adjustment in the waste water of gained, the mixed solution adding hydrogen peroxide and ferrous ion is (fragrant
Pause reagent), add rear mixing time and keep 10 ~ 30 seconds, it is ensured that react completely；
3) will be through step 2) adjustment process after gained waste water in add chlorine or sodium hypochlorite, add rear mixing time 5 ~ 15
Second, it is ensured that the most anti-；
4) by the waste water after step 3) processes, adjust PH to 6 ~ 9 with alkaline matter, and process through Filter Press, obtain dirt
Dye thing content meets the clear water of environmental requirement, qualified discharge.
Ammonia nitrogen, total phosphorus and the processing method of COD content in reduction sulfate process titanium dioxide waste water the most according to claim 1, its
Be characterised by, step 2) in the dosage of hydrogen peroxide in terms of the mass fraction of hydrogen peroxide/wastewater flow rate, the dosage of hydrogen peroxide
Be 0.45～1 ‰, the dosage of ferrous ion in terms of the mass fraction of ferrous ion/wastewater flow rate, the dosage of ferrous ion
It is 0.60～1.5 ‰.
Ammonia nitrogen, total phosphorus and the processing method of COD content in reduction sulfate process titanium dioxide waste water the most according to claim 2, its
Being characterised by, adding chlorine or sodium hypochlorite in described step 3), wherein free chlorine contents is with the quality of free chlorine/wastewater flow rate
Mark meter, free chlorine dosage is 0.05～0.2 ‰.
4. according to ammonia nitrogen, total phosphorus and the processing method of COD content in the reduction sulfate process titanium dioxide waste water described in Claims 2 or 3,
It is characterized in that, the alkaline matter in described step 4) is the one of sodium hydroxide, calcium hydroxide or potassium hydroxide, alkaline matter
Dosage in terms of the mass fraction of OH/wastewater flow rate, the dosage of alkaline matter is 0.5～1.2 ‰.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110963729A (en) * | 2020-01-03 | 2020-04-07 | 龙蟒佰利联集团股份有限公司 | Method for preparing titanium dioxide byproduct gypsum and reducing standard thickening water consumption |
| US20210206636A1 (en) * | 2018-04-03 | 2021-07-08 | Honbusankei Co., Ltd. | Manufacturing method for obtaining novel chlorine oxide composition from degraded hypochlorite |
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| CN103787537A (en) * | 2012-10-30 | 2014-05-14 | 中国石油化工股份有限公司 | Sewage processing method and application thereof |
| CN104710072A (en) * | 2013-12-17 | 2015-06-17 | 上海轻工业研究所有限公司 | Electroplating synthetical wastewater treatment method and system |
| CN105800822A (en) * | 2014-12-30 | 2016-07-27 | 上海轻工业研究所有限公司 | Method and equipment for standards-reaching treatment of chemical nickel plating waste liquid |
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| US20030234224A1 (en) * | 2002-04-19 | 2003-12-25 | Hydro-Trace, Inc. | Process for remediating ground water containing one or more nitrogen compounds |
| CN101962239A (en) * | 2010-09-20 | 2011-02-02 | 湖南永利化工股份有限公司 | Method for purifying titanium white wastewater |
| CN103787537A (en) * | 2012-10-30 | 2014-05-14 | 中国石油化工股份有限公司 | Sewage processing method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20210206636A1 (en) * | 2018-04-03 | 2021-07-08 | Honbusankei Co., Ltd. | Manufacturing method for obtaining novel chlorine oxide composition from degraded hypochlorite |
| CN110963729A (en) * | 2020-01-03 | 2020-04-07 | 龙蟒佰利联集团股份有限公司 | Method for preparing titanium dioxide byproduct gypsum and reducing standard thickening water consumption |
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