CN101665278A - Compound phosphorus removal flocculating agent for water treatment - Google Patents
Compound phosphorus removal flocculating agent for water treatment Download PDFInfo
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- CN101665278A CN101665278A CN200810119647A CN200810119647A CN101665278A CN 101665278 A CN101665278 A CN 101665278A CN 200810119647 A CN200810119647 A CN 200810119647A CN 200810119647 A CN200810119647 A CN 200810119647A CN 101665278 A CN101665278 A CN 101665278A
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- water treatment
- flocculating agent
- phosphorus removal
- compound phosphorus
- red mud
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Abstract
The invention discloses a compound phosphorus removal flocculating agent for water treatment, which is compounded by red mud and calcium oxide. 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 wastewater with highconcentration.
Description
Technical field
The present invention discloses a kind of compound phosphorus removal flocculating agent for water treatment, relates in particular to a kind of coagulation for phosphorus removal technology that is applicable to high-concentration phosphorus-containing wastewater, belongs to the water treatment agent field.
Background technology
Phosphorus is important industrial raw materials, all is widely used in industrial production such as chemical fertilizer, washing composition, food-drink, metallurgy, therefore produces phosphorus-containing wastewater in industrial production inevitably.If undressed phosphorus-containing wastewater directly is discharged in the water body, not only can cause the waste of phosphor resource, the more important thing is the eutrophication that this can cause water body, reduce the water body quality, pollute rare day by day valuable water resources.
Eliminating method commonly used both at home and abroad at present can be divided into biochemical process and chemical flocculation precipitation method generally.Biochemical process is to utilize polyP bacteria under anaerobic to discharge phosphorus and the principle dephosphorization of excessive suction phosphorus under aerobic condition, and its feature is that working cost is low, operational requirement strictness, but poor stability.The chemical flocculation precipitation method is the throw out that dosing coagulant generates phosphorus in raw wastewater or in the secondary treatment yielding water, and coagulating agent commonly used has Tai-Ace S 150, polymerize aluminum chloride, bodied ferric sulfate etc.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 waste residue 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 bayer's process commonly used can produce 0.5-0.6 ton red mud, and the 2006 aluminum oxide output of being only Shandong Aluminum group just reach 1,000 ten thousand tons.If the direct air storage of a large amount of waste red mud residues is appropriation of land both, cause environmental pollution again easily.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, sorbent material starting material.
The present invention is a raw material with the red mud, has prepared a kind of compound phosphorus removal flocculating agent for water treatment, has realized the utilization again of waste resource, has solved the difficult problem that high-concentration phosphorus-containing wastewater is handled, and has remarkable economical and social benefit.
Summary of the invention:
The purpose of this invention is to provide a kind of efficient compound phosphorus removal flocculating agent for water treatment.Mainly based on red mud, composite calcium oxide, thus improve dephosphorization efficiency by using, reduce the water outlet phosphorus content, reduce the cost of wastewater treatment.
The technical solution used in the present invention is as follows:
A kind of compound phosphorus removal flocculating agent for water treatment, this flocculation agent can be by following method preparation.
(1) red mud and calcium oxide are dried respectively to grind 100 mesh sieves standby.
(2) red mud and calcium oxide are mixed, weight ratio is: red mud 50-80%, calcium oxide 20-50%.
(3) with mixture calcination activation in retort furnace of red mud and calcium oxide, activation temperature is controlled at 300-1200 ℃, and soak time is 2-4 hour.
(4) after priming reaction finishes, the solid matter in the reaction system is cooled off, promptly obtain compound phosphorus removal flocculating agent for water treatment.
In the water of source, add compound phosphorus removal flocculating agent for water treatment 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 1:
(1) preparation of compound phosphorus removal flocculating agent for water treatment
Red mud and calcium oxide dried respectively ground 100 mesh sieves, mix, through 700 ℃ of roastings, cooling and obtain compound phosphorus removal flocculating agent for water treatment with 1: 1 weight ratio.
(2) dephosphorization experiment
In the present embodiment, former water total phosphorus is 103.5mg/L, pH3.9.At first former water pH is adjusted to 5.0, fully in former water, is adding compound phosphorus removal flocculating agent for water treatment under the agitation condition then.This flocculation agent is made up of 0.5g/L red mud and 0.5g/L calcium oxide.Through routine mixing, flocculation reaction, post precipitation, tp removal rate reaches 95.24%.
Example 2:
(1) preparation of compound phosphorus removal flocculating agent for water treatment
Red mud and calcium oxide dried respectively ground 100 mesh sieves, mix, through 500 ℃ of roastings, cooling and obtain compound phosphorus removal flocculating agent for water treatment with 2: 1 weight ratios.
(2) dephosphorization experiment
In the present embodiment, former water total phosphorus is 103.5mg/L, pH3.9.Fully in former water, adding compound phosphorus removal flocculating agent for water treatment under the agitation condition.This flocculation agent is made up of 1.5g/L red mud and 1.5g/L calcium oxide.Through routine mixing, flocculation reaction, post precipitation, tp removal rate reaches 93.56%.
Example 3:
(1) preparation of compound phosphorus removal flocculating agent for water treatment
Red mud and calcium oxide dried respectively ground 100 mesh sieves, mix, through 300 ℃ of roastings, cooling and obtain compound phosphorus removal flocculating agent for water treatment with 1: 1 weight ratio.
(2) dephosphorization experiment
In the present embodiment, former water total phosphorus is 103.5mg/L, pH3.9.At first former water pH is adjusted to 8.0, fully in former water, is adding compound phosphorus removal flocculating agent for water treatment under the agitation condition then.This flocculation agent is made up of 0.5g/L red mud and 0.5g/L calcium oxide.Through routine mixing, flocculation reaction, post precipitation, tp removal rate reaches 99.91%.
Claims (4)
1, a kind of compound phosphorus removal flocculating agent for water treatment is characterized in that it is by red mud and calcium oxide is composite to form.
2, compound phosphorus removal flocculating agent for water treatment according to claim 1 is characterized in that weight ratio is: red mud 50-80%, calcium oxide 20-50%.
3, compound phosphorus removal flocculating agent for water treatment according to claim 1 is characterized in that maturing temperature is: 300-1200 ℃.
4, compound phosphorus removal flocculating agent for water treatment according to claim 1 is characterized in that soak time is 2-4 hour.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810119647A CN101665278A (en) | 2008-09-05 | 2008-09-05 | Compound phosphorus removal flocculating agent for water treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200810119647A CN101665278A (en) | 2008-09-05 | 2008-09-05 | Compound phosphorus removal flocculating agent for water treatment |
Publications (1)
| Publication Number | Publication Date |
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| CN101665278A true CN101665278A (en) | 2010-03-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN200810119647A Pending CN101665278A (en) | 2008-09-05 | 2008-09-05 | Compound phosphorus removal flocculating agent for water treatment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102234167A (en) * | 2010-05-06 | 2011-11-09 | 中国科学院生态环境研究中心 | Method for stabilizing phosphorus and heavy metal in sludge of sewage treatment factory |
| 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 |
| CN102674511A (en) * | 2012-05-02 | 2012-09-19 | 中国科学院生态环境研究中心 | Method for preparing composite flocculant for printing and dyeing wastewater treatment |
| CN103951463A (en) * | 2014-05-13 | 2014-07-30 | 贵州大学 | In-situ control coverage material for bottom mud of eutrophication-polluted lake, as well as preparation method thereof |
| CN104250036A (en) * | 2013-06-27 | 2014-12-31 | 沈阳铝镁设计研究院有限公司 | Phosphorus removal compound flocculating agent prepared from red mud and preparation method and use method |
-
2008
- 2008-09-05 CN CN200810119647A patent/CN101665278A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102234167A (en) * | 2010-05-06 | 2011-11-09 | 中国科学院生态环境研究中心 | Method for stabilizing phosphorus and heavy metal in sludge of sewage treatment factory |
| 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 |
| CN102674511A (en) * | 2012-05-02 | 2012-09-19 | 中国科学院生态环境研究中心 | Method for preparing composite flocculant for printing and dyeing wastewater treatment |
| 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 |
| CN104250036A (en) * | 2013-06-27 | 2014-12-31 | 沈阳铝镁设计研究院有限公司 | Phosphorus removal compound flocculating agent prepared from red mud and preparation method and use method |
| 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 |
| CN103951463A (en) * | 2014-05-13 | 2014-07-30 | 贵州大学 | In-situ control coverage material for bottom mud of eutrophication-polluted lake, as well as preparation method thereof |
| CN103951463B (en) * | 2014-05-13 | 2016-08-17 | 贵州大学 | Eutrophication pollution bottom mud in lake in-situ control covers material and preparation method thereof |
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Open date: 20100310 |