CN101665279B - Preparation method of flocculating agent for removing phosphor with low concentration in water - Google Patents
Preparation method of flocculating agent for removing phosphor with low concentration in water Download PDFInfo
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- CN101665279B CN101665279B CN2008101196485A CN200810119648A CN101665279B CN 101665279 B CN101665279 B CN 101665279B CN 2008101196485 A CN2008101196485 A CN 2008101196485A CN 200810119648 A CN200810119648 A CN 200810119648A CN 101665279 B CN101665279 B CN 101665279B
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- red mud
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Abstract
The invention discloses a flocculating agent which is synthetized by aluminum chloride and red mud. The flocculating agent is simple in preparation method, good in phosphor removal effect, low in agent cost, safe and reliable, suitable for a wide range of water treatment engineering and most suitable for treating phosphor-containing water with low concentration.
Description
Technical field
The invention belongs to the water treatment agent field, relate in particular to a kind of coagulation for phosphorus removal technology that is applicable to low-concentration phosphorus-containing water.
Background technology
Recent years, body eutrophication becomes the environmental problem of worldwide attention, and phosphorus is the key element that causes body eutrophication, and the key of control body eutrophication is the phosphorus content in the control water body, and the phosphorus that therefore reduces in the water body is the important means of control body eutrophication.Mainly the chemical precipitation reaction that utilizes phosphorus in the phosphorus removing method commonly used both at home and abroad at present, make the resolvability phosphorus in the sewage be converted into insoluble calcium phosphate precipitation, or utilize polyP bacteria under anaerobic to discharge phosphorus and the principle dephosphorization of excessive suction phosphorus under aerobic condition, i.e. chemical dephosphorization or biological phosphate-eliminating.The biological process working cost is low, but the operational requirement strictness, poor stability.The chemical flocculation precipitation method is a dephosphorization technique the most effective so far, that stability is best, but the reagent cost costliness, it is big to produce sludge quantity.
Red mud is the residual slag that bauxite is produced when highly basic leaches in the aluminum oxide production process, is strong basicity.China's aluminum oxide industry fast development in recent years, the red mud generation is very big.For example, 1 ton of aluminum oxide of the every production of sintering process commonly used can produce 1.0-1.3 ton red mud, and the 2006 aluminum oxide output of being only Shandong Aluminum group just reach 1,000 ten thousand tons.On the one hand, a large amount of waste red mud residues is land occupation not only in the open directly, expends stockyard construction and maintenance cost, and causes soil seriously to alkalize, polluted surface and underground water source.On the other hand, contain a large amount of CaO, Al in the red mud
2O
3, Fe
2O
3, SiO
2The isoreactivity composition is a kind of ideal flocculation agent starting material.
The present invention is a raw material with the red mud, has prepared a kind of flocculation agent that is used for removing the water low phosphorus, has realized the utilization again of waste resource, has solved the difficult problem of low-concentration phosphorus-containing water treatment, has remarkable economical and social benefit.
Summary of the invention:
The purpose of this invention is to provide a kind of flocculation agent that is used for removing the water low phosphorus.
The technical solution used in the present invention is as follows:
A kind of flocculation agent that is used for removing the water low phosphorus, this flocculation agent can be by following method preparation.
(1) it is standby 100 mesh sieves to be ground in the red mud oven dry.
(2) preparation liquor alumini chloridi, concentration of aluminum chloride is 1-3M.
(3) under stirring condition, in liquor alumini chloridi, add red mud, measure the pH of mixed solution simultaneously, when the pH of mixed solution reached 2.8-3.1, red mud stopped to add.
(4) mixed solution continues to stir 5-12 hour, as long as stirring velocity can make red mud and aluminum chloride mixing.
(5) after stirring finished, mixed solution left standstill 24h.
According to source water quality, add a certain amount of flocculation agent among the Xiang Yuanshui during application,, can efficiently remove the phosphorus in the waste water then through mixing, flocculation reaction, precipitation.
Embodiment:
The present invention carries out in the laboratory, below by example the present invention is elaborated.
Example one:
(1) preparation of flocculation agent
At first 100 mesh sieves were ground in the red mud oven dry, the liquor alumini chloridi of preparation 1M.Under stirring condition, in liquor alumini chloridi, add red mud, measure the pH of mixed solution simultaneously, when the pH of mixed solution reached 2.9, red mud stopped to add, and this moment, the dosage of red mud was 140g.Mixed solution stirred 5 hours, and stirring velocity is 100 rev/mins.After stirring end, mixed solution leaves standstill 24h.
(2) dephosphorization experiment
In the present embodiment, former water total phosphorus is 1.0mg/L.The phosphate eliminating flocculant that under abundant agitation condition, in former water, adds above-mentioned preparation.When flocculant dosage was 0.30ml/L, behind routine mixing, flocculation reaction, sedimentation and filtration, water outlet phosphorus did not detect.
Example two:
(1) preparation of flocculation agent
At first 100 mesh sieves were ground in the red mud oven dry, the liquor alumini chloridi of preparation 1M.Under stirring condition, in liquor alumini chloridi, add red mud, measure the pH of mixed solution simultaneously, when the pH of mixed solution reached 3.1, red mud stopped to add, and this moment, the dosage of red mud was 150g.Mixed solution stirred 12 hours, and stirring velocity is 150 rev/mins.After stirring end, mixed solution leaves standstill 24h.
(2) dephosphorization experiment
In the present embodiment, former water total phosphorus is 0.5mg/L.The phosphate eliminating flocculant that under abundant agitation condition, in former water, adds above-mentioned preparation.When flocculant dosage was 0.15ml/L, behind routine mixing, flocculation reaction, sedimentation and filtration, water outlet phosphorus did not detect.
Example three:
(1) preparation of flocculation agent
At first 100 mesh sieves were ground in the red mud oven dry, the liquor alumini chloridi of preparation 1M.Under stirring condition, in liquor alumini chloridi, add red mud, measure the pH of mixed solution simultaneously, when the pH of mixed solution reached 3.1, red mud stopped to add, and this moment, the dosage of red mud was 150g.Mixed solution stirred 8 hours, and stirring velocity is 100 rev/mins.After stirring end, mixed solution leaves standstill 24h.
(2) dephosphorization experiment
In the present embodiment, former water total phosphorus is 0.2mg/L.The phosphate eliminating flocculant that under abundant agitation condition, in former water, adds above-mentioned preparation.When flocculant dosage was 0.10ml/L, behind routine mixing, flocculation reaction, sedimentation and filtration, water outlet phosphorus did not detect.
Claims (1)
1. preparation method who is used for removing the flocculation agent of water low phosphorus is characterized in that:
(1) it is standby 100 mesh sieves to be ground in the red mud oven dry;
(2) preparation liquor alumini chloridi, concentration of aluminum chloride is 1-3M;
(3) under stirring condition, in liquor alumini chloridi, add red mud, measure the pH of mixed solution simultaneously, when the pH of mixed solution reached 2.8-3.1, red mud stopped to add;
(4) mixed solution continues to stir 5-12 hour, as long as stirring velocity can make red mud and aluminum chloride mixing;
(5) after stirring finished, mixed solution left standstill 24h.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008101196485A CN101665279B (en) | 2008-09-05 | 2008-09-05 | Preparation method of flocculating agent for removing phosphor with low concentration in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2008101196485A CN101665279B (en) | 2008-09-05 | 2008-09-05 | Preparation method of flocculating agent for removing phosphor with low concentration in water |
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| Publication Number | Publication Date |
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| CN101665279A CN101665279A (en) | 2010-03-10 |
| CN101665279B true CN101665279B (en) | 2011-06-22 |
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| CN2008101196485A Expired - Fee Related CN101665279B (en) | 2008-09-05 | 2008-09-05 | Preparation method of flocculating agent for removing phosphor with low concentration in water |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485663A (en) * | 2011-03-10 | 2012-06-06 | 中国环境科学研究院 | Constructed wetland composite filling material for water treatment and preparation method thereof |
| CN102674511B (en) * | 2012-05-02 | 2013-10-02 | 中国科学院生态环境研究中心 | Method for preparing composite flocculant for printing and dyeing wastewater treatment |
| CN104250036B (en) * | 2013-06-27 | 2016-08-10 | 沈阳铝镁设计研究院有限公司 | Utilize dephosphorization composite flocculation agent and preparation method and using method that red mud makes |
| CN104549173A (en) * | 2015-02-06 | 2015-04-29 | 中国环境科学研究院 | Preparation method and application of phosphorus-adsorbing material used in sewage |
| CN108706647A (en) * | 2018-05-28 | 2018-10-26 | 濮阳职业技术学院 | A kind of special phosphorus removing agent for phosphorus wastewater treatment |
| CN109879387A (en) * | 2019-03-22 | 2019-06-14 | 长沙如洋环保科技有限公司 | A kind of slaughter technics treatment process |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1981921A (en) * | 2005-12-14 | 2007-06-20 | 中国科学院生态环境研究中心 | High-activity mud adsorbent and its production |
| CN101143312A (en) * | 2006-09-12 | 2008-03-19 | 中国科学院生态环境研究中心 | Method for manufacturing and regenerating granular red mud absorber used for water process |
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2008
- 2008-09-05 CN CN2008101196485A patent/CN101665279B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1981921A (en) * | 2005-12-14 | 2007-06-20 | 中国科学院生态环境研究中心 | High-activity mud adsorbent and its production |
| CN101143312A (en) * | 2006-09-12 | 2008-03-19 | 中国科学院生态环境研究中心 | Method for manufacturing and regenerating granular red mud absorber used for water process |
Non-Patent Citations (3)
| Title |
|---|
| Edith Poulin et al..Transformation of red mud from aluminium industry into a coagulant for wastewater treatment.《Hydrometallurgy》.2008,第92卷16-25. * |
| 余建萍等.利用工业废物制备新型无机复合絮凝剂.《工业水处理》.2007,第27卷(第9期),45-47. * |
| 庞世花等.氧化铝厂赤泥生产聚合氯化铝铁絮凝剂.《工业用水与废水》.2008,第39卷(第4期),66-68. * |
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