CN101353195A - Method for effectively removing nitrogen and phosphor in eutrophic water and water treatment agent - Google Patents
Method for effectively removing nitrogen and phosphor in eutrophic water and water treatment agent Download PDFInfo
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- CN101353195A CN101353195A CNA2007100257025A CN200710025702A CN101353195A CN 101353195 A CN101353195 A CN 101353195A CN A2007100257025 A CNA2007100257025 A CN A2007100257025A CN 200710025702 A CN200710025702 A CN 200710025702A CN 101353195 A CN101353195 A CN 101353195A
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Abstract
The invention discloses a method for efficiently removing nitrogen and phosphor in eutrophic water. The characters thereof are that modified fly ash and magnetite powder are mixed evenly according to the mass ratio of 1:0.5 to 2, dried under the temperature of 60-80 DEG C, and ground to powder, then the powder and polymeric aluminum ferric chloride are mixed evenly according to the mass ratio of 1:0.5 to 2, the water treatment agent is prepared, put into the polluted water, and stirred quickly, after flocs appear, external magnetic field is added, and the flocs are moved out. After the treatment by using the method of the invention, the turbidity in the water of lake reduces by 100% approximately, the total phosphor reduces by over 90%, the total nitrogen reduces by 50-80%, and COD reduces by over 90%. Nitrogen and phosphor in the water can be removed efficiently, therefore algae bloom is stopped thoroughly.
Description
Technical field
The invention belongs to a kind of water treatment method, specifically is the method for nitrogen, phosphorus in a kind of effective removal eutrophication water.
Background technology
The human economic society development is to be unable to do without the water source.The lake is the important component part of the needed natural resources of mankind's socio-economic development, its existing abundant water yield, and waterpower and aquatic resources have the function that flood storage is taken precautions against natural calamities in flood season again.But protection lacks heightened awareness because people are to lake environment, and many lake environments are destroyed.In China's lake pollution, to lake harm bigger should belong to lake eutrophication.
The origin cause of formation of the eutrophication of generally acknowledging mainly is the temperature that suits at present, flowing water form slowly, total phosphorus, nutritive salt such as total nitrogen are sufficient relatively, abundant basic substance is provided for a large amount of breedings of aquatic biology (mainly being algae), causes the explosive propagation of planktonic algae (or aquatic macrophyte).Its harm mainly contains the following aspects: the one, influence water supply quality, and increase water producing cost; The 2nd, influence the ecotope of water body in lake, cause hydrobiological stability and diversity to reduce; The 3rd, influence the sensory properties of water body, blue-green algae breeds in a large number in the water body, water turbidity, transparency reduces, and distributes stench; The 4th, influence Biological resources utilizations such as fishery, the water body economic worth reduces.
The control of eutrophication is very thorny and arm and a leg problem in the water pollution control, and its reason is: it is highly difficult that the complicacy of source of pollution and nutritive substance are removed.Generally pass through to formulate emission standard, water quality standard for the exogenous nutrition material; Implement to cut dirty engineering; Means such as administrative control are controlled.The distribution of nutritive substance on time and space in the water body in lake is very complicated to seem very difficult and the removal of endogenic nutritive substance is owing to being input to.
At present, the technology at the endogenous nutritive substance mainly contains following several:
1. artificial aeration.This measure is applicable to that the water body of anaerobic layer appears in those lake water deeply.In the lake of eutrophication, phosphorus is easy under anaerobic discharge from bed mud in the bed mud.If adopting aeration boat is the lakebed delivery of supplemental oxygen regularly, make between water and the bed mud interface anaerobic layer not occur, often maintain oxygen condition, this will help suppressing the release of phosphorus in the bed mud, and will be favourable to the improvement of water quality.This method is owing to the restriction that is subjected to economic condition often can only promote the use in small-sized lake.
2. water is changed in diversion.Can consider to draw the water nitrogenous, that phosphorus concentration is low in place with good conditionsi and go into the lake, this can combine with the recycling of municipal effluent and carry out.This method is to reducing lake water nutritive substance concentration, and the control body eutrophication has certain effect, but can not tackle the problem at its root.
3. chemical inerting phosphorus.Phosphorus will surpass nitrogen to the load of most water body in lake eutrophication, and therefore, control phosphorus is one of key of the lake eutrophication comprehensive regulation.Studies show that: can reach the purpose of inerting phosphorus, phosphorus restriction load by in lake water, adding chemical substances such as aluminium salt, molysite.But this method sinks to lakebed with nutritive substance, can cause secondary pollution.
4. magnetic gathers flocculence.An important behaviour of freshwater lake eutrophication is exactly the blue algae bloom growth in the water body.This laboratory previous work utilizes magnetic flocculant with the wadding of the blue-green algae in freshwater lake collection, and the method by magnetic resolution shifts out water body with flco again.Studies show that this method can effectively be removed the blue-green algae in the water body, and can effectively reduce the total nitrogen in the water body, total phosphorus, indexs such as COD.But this laboratory previous work at all be the blue algae bloom freshwater lake water body in period, the water body in non-blue algae bloom period is handled and is not related to, and forefathers also focus on the removal of blue-green algae when working in this respect and do not consider improvement in the non-outbreak period of algal tufa doing.
Summary of the invention
The invention provides the method and the water conditioner of nitrogen, phosphorus in a kind of effective removal eutrophication water
Technical scheme of the present invention is as follows:
The method of nitrogen, phosphorus in a kind of effective removal eutrophication water, it is characterized in that modified coal ash, magnetite powder are mixed according to the proportioning of mass ratio 1: 0.5-2,60-80 ℃ of oven dry down, grind into powder mixes powder and the aluminium iron polychloride proportioning according to mass ratio 1: 0.5-2 then, makes water conditioner, be added in the polluted-water, stir fast, after waiting flco to occur, add that foreign field shifts out flco.
The water treatment dosage that is added in the polluted-water is 200-250mg/L water.
Modified coal ash, magnetite powder mass ratio are 1: 0.8-1.2, described powder and aluminium iron polychloride mass ratio are 1: 0.8-1.2.
Effectively remove the water conditioner of nitrogen, phosphorus in the eutrophication water, it is characterized in that the quality proportioning of its component is:
A component 1
Aluminium iron polychloride 0.5-2;
Wherein the raw material weight prescription of A component is:
Modified coal ash 1
Magnetite powder 0.5-2.
The water conditioner of nitrogen, phosphorus in described effective removal eutrophication water is characterized in that the quality proportioning of its component is:
A component 1
Aluminium iron polychloride 0.8-1.2;
Wherein the raw material weight prescription of A component is:
Modified coal ash 1
Magnetite powder 0.8-1.2.
Its principle is: utilize the flyash of modification and magnetite powder mixture to be equipped with aluminium iron polychloride by the pollutent in the flocculation planar water, and flco is shifted out water body by the foreign field effect, can effectively remove nitrogen, phosphorus in the water body, fundamentally suppress the generation of fresh water algal bloom.
Advantage of the present invention:
1. after handling with the inventive method, turbidity reduces closely 100% in the water of lake, and total phosphorus reduces more than 90%, total nitrogen reduction 50-80%, and COD reduces more than 90%.Effectively remove nitrogen, phosphorus in the water body, thus the generation of thoroughly stopping wawter bloom.
2. owing to used power plant's waste flyash, in removing water body, in nitrogen and the phosphorus, also alleviated the accumulation pressure of flyash to a certain extent, turned waste into wealth.
3. have stronger magnetic responsiveness, the flco of handling the back generation shifts out water body by the action of a magnetic field, has stopped secondary pollution.
The invention process is easy, and is with low cost, and in lake eutrophication, fields such as papermaking, agricultural chemicals, plating and resident living sewage have popularizing application prospect.
Embodiment
With modified coal ash, magnetite powder mixes according to the proportioning of 1: 1 (mass ratio), and 60-80 ℃ of down oven dry grinds to form powdery, then with itself and aluminium iron polychloride according to the ratio of 1: 1 (mass ratio), make water conditioner.The dosage of pressing 200-250mg/L adds in the pollution water sample, stirs 1-3min fast, treat flco become big after, add that foreign field shifts out flco.
Claims (5)
1, the method for nitrogen, phosphorus in a kind of effective removal eutrophication water, it is characterized in that modified coal ash, magnetite powder are mixed according to the proportioning of mass ratio 1: 0.5-2,60-80 ℃ of oven dry down, grind into powder mixes powder and the aluminium iron polychloride proportioning according to mass ratio 1: 0.5-2 then, makes water conditioner, be added in the polluted-water, stir fast, after waiting flco to occur, add that foreign field shifts out flco.
2, the method for nitrogen, phosphorus in effective removal eutrophication water according to claim 1, the water treatment dosage that it is characterized in that being added in the polluted-water is 200-250mg/L water.
3, the method for nitrogen, phosphorus in effective removal eutrophication water according to claim 1, it is characterized in that modified coal ash, magnetite powder mass ratio are 1: 0.8-1.2, described powder and aluminium iron polychloride mass ratio are 1: 0.8-1.2.
4, effectively remove the water conditioner of nitrogen in the eutrophication water, phosphorus, it is characterized in that the quality proportioning of its component is:
A component 1
Aluminium iron polychloride 0.5-2;
Wherein the raw material weight prescription of A component is:
Modified coal ash 1
Magnetite powder 0.5-2.
5, the water conditioner of nitrogen, phosphorus in effective removal eutrophication water according to claim 4 is characterized in that the quality proportioning of its component is:
A component 1
Aluminium iron polychloride 0.8-1.2;
Wherein the raw material weight prescription of A component is:
Modified coal ash 1
Magnetite powder 0.8-1.2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100257025A CN101353195B (en) | 2007-07-28 | 2007-07-28 | Method for effectively removing nitrogen and phosphor in eutrophic water and water treatment agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2007100257025A CN101353195B (en) | 2007-07-28 | 2007-07-28 | Method for effectively removing nitrogen and phosphor in eutrophic water and water treatment agent |
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| Publication Number | Publication Date |
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| CN101353195A true CN101353195A (en) | 2009-01-28 |
| CN101353195B CN101353195B (en) | 2010-12-08 |
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| CN2007100257025A Expired - Fee Related CN101353195B (en) | 2007-07-28 | 2007-07-28 | Method for effectively removing nitrogen and phosphor in eutrophic water and water treatment agent |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863059A (en) * | 2012-09-07 | 2013-01-09 | 上海同济环境工程科技有限公司 | Additive for enhancing function of organism in aspect of ammonia nitrogen removal in water and use method of additive |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1160682A (en) * | 1996-04-01 | 1997-10-01 | 国家海洋局海洋环境保护研究所 | Composite coagulant for water treatment and its preparation process |
| CN100486907C (en) * | 2006-07-19 | 2009-05-13 | 中国科学院等离子体物理研究所 | Method of control town domestic sewage using magnetic polymers guided by fly ash and flocculant |
| CN100567498C (en) * | 2006-07-28 | 2009-12-09 | 中国科学院等离子体物理研究所 | A kind of method of magnetic polymer flocculation pre-treatment L-lactic acid fermentation liquid |
-
2007
- 2007-07-28 CN CN2007100257025A patent/CN101353195B/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102863059A (en) * | 2012-09-07 | 2013-01-09 | 上海同济环境工程科技有限公司 | Additive for enhancing function of organism in aspect of ammonia nitrogen removal in water and use method of additive |
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| Publication number | Publication date |
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| CN101353195B (en) | 2010-12-08 |
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Granted publication date: 20101208 Termination date: 20110728 |