CN1733617A - Processing method of waste water containing fluorine arsenic and lead - Google Patents
Processing method of waste water containing fluorine arsenic and lead Download PDFInfo
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- CN1733617A CN1733617A CN 200410053619 CN200410053619A CN1733617A CN 1733617 A CN1733617 A CN 1733617A CN 200410053619 CN200410053619 CN 200410053619 CN 200410053619 A CN200410053619 A CN 200410053619A CN 1733617 A CN1733617 A CN 1733617A
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Abstract
The invention relates to treatment method for waste water contained fluorine, arsenic and lead. Wherein, adding alkali, alkali metal oxide or alkali metal salt into waste water to adjust solution alkality; mixing without intermission and adding flocculant to generate floc to deposite; separating the deposition, adjusting solution pH value to 6.0~9.0. This invention overcomes the problem that reaction time lacks and deposition is inadequate, has well removal effect and saves great cost.
Description
Technical field
The present invention relates to a kind of wastewater treatment method, particularly a kind of fluorine-containing, arsenic, plumbous wastewater treatment method.
Background technology
Over nearly two, 30 years, a large amount of research has been carried out in the processing of fluorine-containing, arsenic, plumbous waste water both at home and abroad.A few days ago, fluorine-containing, arsenic, plumbous wastewater treatment method mainly contain absorption method, electrocoagulation, reverse osmosis method, ion exchange method, chemical precipitation method and coagulation sedimentation etc.In these methods, ion exchange method expense height, and strict to waste water quality; Electrocoagulation and reverse osmosis method device complexity, current consumption is big, thereby all seldom adopts.What often adopt is chemical precipitation method and coagulation sedimentation.
1. chemical precipitation method generally adopts calcium salt precipitation method to handle for high-concentration fluorine-contained trade effluent, promptly adds lime or soluble calcium salt (calcium sulfate and calcium chloride etc.) and make F in waste water
-And Ca
2+Generate CaF
2The precipitation and remove.Lime can generate throw outs such as Calcium Fluoride (Fluorspan), Tricalcium arsenate, calcium arsenite with pollutant reactions such as fluorine in the waste water, arsenic, lead.When adding milk of lime, its consumption makes wastewater pH reach at 12 o'clock, can only make also that the mass concentration of fluorine drops to about 15mg/L in the waste water, and suspension content is higher in the water.Carbide slag method handling principle is the same with lime method, mainly utilizes pollutant reactions such as calcium hydroxide in the carbide slag and the fluorine in the waste water, arsenic, lead to generate throw outs such as Calcium Fluoride (Fluorspan), Tricalcium arsenate, calcium arsenite, lead hydroxide.
Coagulation sedimentation this be to handle at present maximum method that fluorine-containing, arsenic, plumbous waste water are used.It is by add or waste water in original Fe
2+, Fe
3+, Al
3+And Mg
2+Plasma, and be transferred to proper pH value with alkali (generally using calcium hydroxide), make it form hydroxide colloid, absorption and with waste water in fluorine, arsenic, plumbous reaction, generate the arsenite and the arsenate of indissoluble, these difficulty soluble salts can be separated out with the oxide compound co-precipitation of polyvalent metal under certain pH condition, and the Calcium Fluoride (Fluorspan) that fluorine in the waste water and lime reaction generate simultaneously also can be coprecipitated.
The subject matter that above technology exists is that neutralization reaction deficiency of time and sludge settling are insufficient.Traditional carbide slag neutralization, natural subsidence technology are administered the sulfuric acid wastewater containing treatment unit, because the waste water part pollution factor (pH, fluorine, suspended substance) after settlement separate does not reach national GB8978-96 " waste water comprehensive discharge standard ", it is serious to exceed standard, need send sewage work further to handle, the processing costs height.
Summary of the invention
The objective of the invention is to overcome the neutralization reaction deficiency of time and the insufficient problem of bringing that can not reach emission standard of sludge settling that exist in the background technology, a kind of treatment process that can make fluorine-containing, arsenic, plumbous waste water reach discharging standards is provided.
The invention provides a kind of fluorine-containing cheaply, arsenic, plumbous method of wastewater treatment, technical scheme is as follows: alkali, alkaline earth metal oxide or alkaline earth salt are joined in the waste water, and the pH value of solution value is adjusted to alkalescence, under constantly stirring, add flocculation agent then, make it produce the throw out sedimentation, separate throw out again, regulator solution pH value to 6.0～9.0 can be discharged in water outlet then.
Wherein said alkali is calcium hydroxide.
Wherein said alkaline earth metal oxide is a calcium oxide.
Wherein said alkaline earth salt is calcium chloride or calcium sulfate.
The alkalescence regulation range is controlled at pH value 11～13.
Flocculation agent is preferably polyacrylamide, sodium polyacrylate or its mixture; It perhaps is the modified version polyacrylamide.
The consumption of flocculation agent is controlled at 2.5mg/L～25.0mg/L.
The consumption of flocculation agent preferably is controlled at 2.5mg/L～5.0mgL.
The present invention obtains good result through experimental examination, and the removal effect of fluorine, arsenic, lead, suspended substance and heavy metal is more satisfactory, and is up to standard comprehensively, no longer needs to send sewage work to make second-stage treatment, can save the large amount of sewage handling.Because the main component of carbide slag is a calcium oxide, and carbide slag itself is a kind of " three wastes ", is used to dispose of sewage to realize the purpose of the treatment of wastes with processes of wastes against one another.
Description of drawings
Fig. 1: process flow sheet of the present invention.
Embodiment
The present invention is described further below by specific embodiment.
Embodiment 1: the schema in conjunction with shown in Figure 1 describes present embodiment.Get IL waste water, the carbide slag liquid that stirs evenly (is contained Ca (OH)
2) join in the waste water, the pH value of solution is transferred to more than 10.5, react after 30 minutes, under the stirring of 300r/min speed, add flocculation agent modified version polyacrylamide then, consumption 3mg/L, the laggard centrifugation of flocculating settling, then the PH of supernatant liquor being adjusted to 7 can discharge.After testing, the content of fluorine is 8.72mg/L in the waste water after the processing, and arsenic content is 0.03mg/L, and lead content is 0.06mg/L, has all reached emission standard.
Embodiment 2: the schema in conjunction with shown in Figure 1 describes present embodiment.Get 1L waste water, the carbide slag liquid that stirs evenly (is contained Ca (OH)
2) join in the waste water, the pH value of solution is transferred to more than 10.5, react after 30 minutes, under the stirring of 300r/min speed, add flocculation agent acrylamide-8 then, consumption 12.5mg/L, the laggard centrifugation of flocculating settling, then the PH of supernatant liquor being adjusted to 7 can discharge.After testing, the content of fluorine is 9.44mg/L in the waste water after the processing, and arsenic content is 0.03mg/L, and lead content is 0.09mg/L, has all reached emission standard.
Embodiment 3: the schema in conjunction with shown in Figure 1 describes present embodiment.Get IL waste water, the carbide slag liquid that stirs evenly (is contained Ca (OH)
2) join in the waste water, the pH value of solution is transferred to more than 10.5, react after 30 minutes, under the stirring of 300r/min speed, add the flocculation agent sodium polyacrylate then, consumption 5mg/L, the laggard centrifugation of flocculating settling, then the PH of supernatant liquor being adjusted to 7 can discharge.After testing, the content of fluorine is 9.07mg/L in the waste water after the processing, and arsenic content is 0.05mg/L, and lead content is 0.06mg/L, has all reached emission standard.
Test example 1: to embodiment 1～3 adopted 3 in the defluorination effect of flocculation agent compare, the results are shown in Table 1:
Table 1: the treatment effect of different flocculation agents
| Flocculation agent | Former water fluorine mg/L | The water outlet fluorine, mg/L |
| The modified version polyacrylamide | 144.98 | 8.72 |
| Polyacrylamide-8 | 144.98 | 9.44 |
| Sodium polyacrylate | 144.98 | 9.07 |
All reached emission standard.
Test example 2: stability test
In this experiment, waste water is divided into 6 groups, gets waste water 500ml for every group, wherein first group is natural subsidence, adds flocculation agent in 2～6.Each group slowly adds carbide slag liquid under constantly stirring, stirring velocity is controlled at about 300r/min, and pH transfers to reaction 30min more than 10.5, adds flocculation agent modified version polyacrylamide 12.5mg/L, behind the coagulation 30 seconds, leave standstill, measure fluorine, arsenic, suspended substance and other indexs in the clear liquid.The results are shown in Table 2:
Table 2 stability test
The result shows, good stability.Waste water is through flocculating settling, and the fluorine in its water outlet, arsenic, suspended substance all reach discharging standards, and a large amount of metallic elements has also been taken away in sedimentation.
Claims (8)
1, a kind of fluorine-containing, arsenic, plumbous wastewater treatment method, it is characterized in that alkali, alkaline earth metal oxide or alkaline earth salt are joined in the waste water, and the pH value of solution value is adjusted to alkalescence, under constantly stirring, add flocculation agent then, make it produce the throw out sedimentation, separate throw out again, regulator solution pH value to 6.0～9.0 can be discharged in water outlet then.
2,, it is characterized in that wherein said alkali is calcium hydroxide according to the described wastewater treatment method of claim 1.
3,, it is characterized in that wherein said alkaline earth metal oxide is a calcium oxide according to the described wastewater treatment method of claim 1.
4,, it is characterized in that alkaline regulation range is controlled at pH value 11～13 according to the described wastewater treatment method of claim 1.
5,, it is characterized in that wherein said flocculation agent is polyacrylamide, sodium polyacrylate or its mixture according to the described wastewater treatment method of claim 1.
6,, it is characterized in that wherein said flocculation agent is the modified version polyacrylamide according to the described wastewater treatment method of claim 5.
7, according to claim 5 or 6 described wastewater treatment method, it is characterized in that the consumption of described flocculation agent is controlled at 2.5mg/L～25.0mg/L.
8,, it is characterized in that the consumption of described flocculation agent is controlled at 2.5mg/L～5.0mg/L according to the described wastewater treatment method of claim 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100536195A CN1329320C (en) | 2004-08-11 | 2004-08-11 | Processing method of waste water containing fluorine arsenic and lead |
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|---|---|---|---|
| CNB2004100536195A CN1329320C (en) | 2004-08-11 | 2004-08-11 | Processing method of waste water containing fluorine arsenic and lead |
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|---|---|
| CN1733617A true CN1733617A (en) | 2006-02-15 |
| CN1329320C CN1329320C (en) | 2007-08-01 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102153141A (en) * | 2010-12-30 | 2011-08-17 | 甘肃锦世化工有限责任公司 | Method for reducing trace element lead in sodium dichromate and chromic anhydride products |
| CN102276043A (en) * | 2011-08-11 | 2011-12-14 | 铜陵化学工业集团有限公司 | Method for treating fluorine-containing industrial wastewater |
| CN102452738A (en) * | 2010-10-22 | 2012-05-16 | 深圳市拓日新能源科技股份有限公司 | Treatment method of fluorine-containing waste water of solar cell plant |
| CN102557222A (en) * | 2012-02-15 | 2012-07-11 | 天津理工大学 | Method for removing trace arsenic from aqueous solution |
| CN103922517A (en) * | 2014-05-12 | 2014-07-16 | 湘潭大学 | Method for treatment and cyclic utilization of sulfuric acid waste water containing heavy metal |
| CN105084598A (en) * | 2015-08-28 | 2015-11-25 | 马鞍山市桓泰环保设备有限公司 | Treatment method of treatment device for mercury, cadmium and lead-contained liquid waste |
| CN106495215A (en) * | 2016-11-02 | 2017-03-15 | 林子柯 | A kind of method for producing magnesium arsenate containing arsenic waste solution |
| CN110963612A (en) * | 2019-12-18 | 2020-04-07 | 上海勘察设计研究院(集团)有限公司 | Method for co-processing lead and arsenic composite pollutants in underground water by adopting pre-oxidation |
| CN113772707A (en) * | 2021-09-29 | 2021-12-10 | 利尔化学股份有限公司 | Treatment method of fluorine-containing potassium chloride |
| CN115557647A (en) * | 2022-10-25 | 2023-01-03 | 广西华锡矿业有限公司再生资源分公司 | Method for reducing arsenic content in high-arsenic ion beneficiation wastewater |
| CN115925066A (en) * | 2022-09-26 | 2023-04-07 | 中国有色集团（广西）平桂飞碟股份有限公司 | Method for removing fluorine and arsenic from discharged wastewater of ammonium paratungstate workshop |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63294986A (en) * | 1987-05-26 | 1988-12-01 | Miyoshi Oil & Fat Co Ltd | Treatment of heavy metal-containing waste water |
| CN1099728A (en) * | 1994-06-24 | 1995-03-08 | 宁波市环境保护科学研究设计院 | Impurity removing method from perferrite solution |
| ATE166328T1 (en) * | 1994-12-20 | 1998-06-15 | M I M Huettenwerke Duisburg Ge | METHOD FOR TREATING WASTE WATER CONTAINING THALLIUM |
| JP2001212576A (en) * | 2000-02-03 | 2001-08-07 | Hitachi Cable Ltd | Method and apparatus for removing lead from wastewater |
-
2004
- 2004-08-11 CN CNB2004100536195A patent/CN1329320C/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102452738A (en) * | 2010-10-22 | 2012-05-16 | 深圳市拓日新能源科技股份有限公司 | Treatment method of fluorine-containing waste water of solar cell plant |
| CN102452738B (en) * | 2010-10-22 | 2014-02-26 | 深圳市拓日新能源科技股份有限公司 | Treatment method of fluorine-containing waste water of solar cell plant |
| CN102153141A (en) * | 2010-12-30 | 2011-08-17 | 甘肃锦世化工有限责任公司 | Method for reducing trace element lead in sodium dichromate and chromic anhydride products |
| CN102276043A (en) * | 2011-08-11 | 2011-12-14 | 铜陵化学工业集团有限公司 | Method for treating fluorine-containing industrial wastewater |
| CN102557222A (en) * | 2012-02-15 | 2012-07-11 | 天津理工大学 | Method for removing trace arsenic from aqueous solution |
| CN103922517B (en) * | 2014-05-12 | 2015-08-19 | 湘潭大学 | A kind of method containing the process of heavy metal sulfuric acid wastewater containing and recycle |
| CN103922517A (en) * | 2014-05-12 | 2014-07-16 | 湘潭大学 | Method for treatment and cyclic utilization of sulfuric acid waste water containing heavy metal |
| CN105084598A (en) * | 2015-08-28 | 2015-11-25 | 马鞍山市桓泰环保设备有限公司 | Treatment method of treatment device for mercury, cadmium and lead-contained liquid waste |
| CN105084598B (en) * | 2015-08-28 | 2017-07-14 | 马鞍山市桓泰环保设备有限公司 | A kind of mercurous, cadmium, the processing method of lead liquid waste treating apparatus |
| CN106495215A (en) * | 2016-11-02 | 2017-03-15 | 林子柯 | A kind of method for producing magnesium arsenate containing arsenic waste solution |
| CN106495215B (en) * | 2016-11-02 | 2017-08-25 | 林子柯 | A kind of method that magnesium arsenate is produced containing arsenic waste solution |
| CN110963612A (en) * | 2019-12-18 | 2020-04-07 | 上海勘察设计研究院(集团)有限公司 | Method for co-processing lead and arsenic composite pollutants in underground water by adopting pre-oxidation |
| CN113772707A (en) * | 2021-09-29 | 2021-12-10 | 利尔化学股份有限公司 | Treatment method of fluorine-containing potassium chloride |
| CN115925066A (en) * | 2022-09-26 | 2023-04-07 | 中国有色集团（广西）平桂飞碟股份有限公司 | Method for removing fluorine and arsenic from discharged wastewater of ammonium paratungstate workshop |
| CN115557647A (en) * | 2022-10-25 | 2023-01-03 | 广西华锡矿业有限公司再生资源分公司 | Method for reducing arsenic content in high-arsenic ion beneficiation wastewater |
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