CN102295363A - Water treatment method for permanganate pre-oxidation and air floatation combined alga removal - Google Patents
Water treatment method for permanganate pre-oxidation and air floatation combined alga removal Download PDFInfo
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- CN102295363A CN102295363A CN2011101572748A CN201110157274A CN102295363A CN 102295363 A CN102295363 A CN 102295363A CN 2011101572748 A CN2011101572748 A CN 2011101572748A CN 201110157274 A CN201110157274 A CN 201110157274A CN 102295363 A CN102295363 A CN 102295363A
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Abstract
The invention relates to a water treatment method for permanganate pre-oxidation and air floatation combined alga removal. The water treatment method is utilized mainly for solving the problems that based on the prior art for removing algae by air floatation, a formed scum layer is loose and microscopic bubbles are unstable and are easy to be broken thus a scum fall phenomenon is produced easily to influence quality of product water obtained by air floatation, and the formed scum layer has a peculiar smell. The water treatment method comprises the following steps of 1, adding one or more permanganates into alga-containing water to carry out pre-oxidation, wherein permanganate pre-oxidation time is controlled, and 2, adding one or more coagulants into the alga-containing water treated by the permanganate pre-oxidation and carrying out coagulation, air floatation, filtration and disinfection to finish permanganate pre-oxidation and air floatation combined alga removal. The water treatment method for permanganate pre-oxidation and air floatation combined alga removal has the characteristics of compact and table scum layer, no peculiar smell of a scum layer, and high alga inactivation efficiency of 70 to 90%. Therefore, the water treatment method for permanganate pre-oxidation and air floatation combined alga removal can be utilized in the water treatment field.
Description
Technical field
The present invention relates to a kind of water treatment method that removes algae.
Background technology
Along with developing rapidly of industrial or agricultural, a large amount of nitrogen, phosphor contaminant enter water body, have quickened the eutrophication process of lake, reservoir, cause a large amount of breedings of algae, cause water quality deterioration.At present, drinking water plant mainly comprises precipitation and air supporting treatment process to the treatment process of algae.Because algae density is little, depositing technology is difficult to its effective removal.And air floatation alga removing technology is by feed the microbubble of a large amount of high dispersing in algae-containing water, adhere to mutually with algae, form global density and float less than the scum silica frost of water, utilize slag scraper that the algae scum silica frost on the water surface is blown off then, promptly finish the removal of algae to the water surface.Therefore, air floatation alga removing technology has relatively more outstanding advantage at the efficient algae aspect that removes.But the scum layer that air floatation alga removing technology forms is more open, and microbubble is unstable easily broken, produces the slag phenomenon, influences the air supporting effluent quality, and scum layer can emit bad smell.
Summary of the invention
The present invention will solve existing air floatation alga removing technology to exist the scum layer that forms more open, microbubble is unstable easily broken, produces the slag phenomenon, influences the air supporting effluent quality, the problem that scum layer emits bad smell provides permanganate preoxidation and air supporting coupling to remove the water treatment method of algae.
Permanganate preoxidation of the present invention and air supporting coupling remove the water treatment method of algae, carry out according to the following steps: one, permanganate is added to the water of algae-containing water source and carry out preoxidation, according to the water quality situation, the permanganate dosage is 0.2～5mg/L, and control permanganate preoxidation time is 5～60min; Two, dosing coagulant in the water after permanganate preoxidation then, the dosage of coagulating agent is 5～100mg/L, through coagulation, air supporting, filtration, sterilization, promptly finishes permanganate preoxidation and air supporting coupling and removes algae; Wherein the described permanganate of step 1 is one or both the mixture in potassium permanganate and the sodium permanganate.
The present invention is with permanganate preoxidation and air supporting coupling, the oxygenizement of permanganate can make the algae deactivation, be easier to the coagulation of algae, the macromole exocytosis thing (polysaccharide, protein etc.) that produces behind the permanganate oxidation algae has amphiphilic nature, character is similar to tensio-active agent, easily in liquid-gas interface absorption, thereby microbubble stability is strengthened, make algae and microbubble tight adhesion be in the same place, the scum layer of formation is closely knit stable;
Some of algae are smelt the flavor meta-bolites, as wood flavor material 2,6,6-trimethylammonium-1-tetrahydrobenzene-1-carboxylic aldehyde, greenweed flavor material is suitable-blatter alcohol, violet flavor material β-ring citrylidene acetone, plant putrid taste material 2 methoxy 3 isobutyl pyrazine, fishy smell material 1-penten-3-ones etc. can be made and handle in the water of back and peculiar smell disappearance in the scum layer by the rapid oxidative degradation of potassium permanganate;
Algae macromole secretory product polysaccharide, protein etc. have carboxyl, amino, hydroxy functional group, the high reactivity intermediate state manganese (as pentavalent manganese, sexavalence manganese) that original position produces in can complex coordination potassium permanganate oxidation process, make the prolonged survival period of these transient state species in water, thereby their oxidation capacity can access effective utilization, further oxidation deactivation algae.
Therefore, the water treatment method that permanganate preoxidation of the present invention and air supporting coupling remove algae has closely knit stable, the scum layer free from extraneous odour of the scum layer of formation, characteristics that algae deactivation efficient is high, and the algae inactivation ratio reaches 70%～90%.
Embodiment
Technical solution of the present invention is not limited to following cited embodiment, also comprises the arbitrary combination between each embodiment.
Embodiment one: preoxidation of present embodiment permanganate and air supporting coupling remove the water treatment method of algae, carry out according to the following steps: one, permanganate is added to the water of algae-containing water source and carry out preoxidation, according to the water quality situation, the permanganate dosage is 0.2～5mg/L, and control permanganate preoxidation time is 5～60min; Two, dosing coagulant in the water after permanganate preoxidation then, the dosage of coagulating agent is 5～100mg/L, through coagulation, air supporting, filtration, sterilization, promptly finishes permanganate preoxidation and air supporting coupling and removes algae; Wherein the described permanganate of step 1 is one or both the mixture in potassium permanganate and the sodium permanganate.
Closely knit stable, the scum layer free from extraneous odour of the scum layer that present embodiment forms, algae deactivation efficient height, the algae inactivation ratio reaches 70%～90%.
The dosing method of permanganate can add or dry type adds for wet method in the present embodiment step 1, and it is that permanganate formation solution soluble in water is added that wet method adds, and it is directly permanganate to be added to the water of algae-containing water source that dry type adds.
When the described permanganate of present embodiment step 1 was the mixture of potassium permanganate and sodium permanganate, potassium permanganate and sodium permanganate were pressed arbitrarily than mixing.
The described air supporting of present embodiment step 2 is finished by the air supporting processing unit, and the air supporting processing unit is made up of air dissolving system, air-floating apparatus and dreg scraping unit spare, and wherein air dissolving system is made up of micropore reliever and air dissolved pump or dissolving.
Embodiment two: what present embodiment and embodiment one were different is: the permanganate dosage is 0.5～4mg/L in the step 1.Other is identical with embodiment one.
Embodiment three: what present embodiment and embodiment one were different is: the permanganate dosage is 1～3mg/L in the step 1.Other is identical with embodiment one.
Embodiment four: what present embodiment and embodiment one were different is: the permanganate dosage is 2mg/L in the step 1.Other is identical with embodiment one.
Embodiment five: what present embodiment was different with one of embodiment one to four is: control permanganate preoxidation time is 10～50min in the step 1.Other is identical with one of embodiment one to four.
Embodiment six: what present embodiment was different with one of embodiment one to four is: control permanganate preoxidation time is 20～40min in the step 1.Other is identical with one of embodiment one to four.
Embodiment seven: what present embodiment was different with one of embodiment one to four is: control permanganate preoxidation time is 30min in the step 1.Other is identical with one of embodiment one to four.
Embodiment eight: what present embodiment was different with one of embodiment one to seven is: the described coagulating agent of step 2 is any one or a few mixture in aluminum chloride, Tai-Ace S 150, ferrous sulfate, ferric sulfate, iron(ic) chloride, poly-ferric chloride, polymerize aluminum chloride, the polyaluminium sulfate.Other is identical with one of embodiment one to seven.
When the described coagulating agent of present embodiment step 2 was mixture, each component was pressed arbitrarily than mixing.
Embodiment nine: what present embodiment was different with one of embodiment one to eight is: the dosage of coagulating agent is 10～80mg/L in the step 2.Other is identical with one of embodiment one to eight.
Embodiment ten: what present embodiment was different with one of embodiment one to eight is: the dosage of coagulating agent is 30～70mg/L in the step 2.Other is identical with one of embodiment one to eight.
Embodiment 11: what present embodiment was different with one of embodiment one to eight is: the dosage of coagulating agent is 50mg/L in the step 2.Other is identical with one of embodiment one to eight.
Embodiment 12: preoxidation of present embodiment permanganate and air supporting coupling remove the water treatment method of algae, carry out according to the following steps: one, potassium permanganate is added to the water of algae-containing water source and carry out preoxidation, according to the water quality situation, the potassium permanganate dosage is 1.0mg/L, and the control Potassium Permanganate Preoxidation time is 30min; Two, dosing coagulant in the water after Potassium Permanganate Preoxidation then, the dosage of coagulating agent is 60mg/L, through coagulation, air supporting, filtration, sterilization, promptly finishes permanganate preoxidation and air supporting coupling and removes algae; Wherein the described coagulating agent of step 2 is the mixture of aluminum chloride, ferric sulfate, poly-ferric chloride and polyaluminium sulfate.
Closely knit stable, the scum layer free from extraneous odour of the scum layer that algae-containing water source water after present embodiment is handled forms, algae deactivation efficient height, the algae inactivation ratio reaches 90%.
Embodiment 13: preoxidation of present embodiment permanganate and air supporting coupling remove the water treatment method of algae, carry out according to the following steps: one, sodium permanganate is added to the water of algae-containing water source and carry out preoxidation, according to the water quality situation, the sodium permanganate dosage is 2.5mg/L, control sodium permanganate preoxidation time 40min; Two, dosing coagulant in the water after sodium permanganate preoxidation then, the dosage of coagulating agent is 45mg/L, through coagulation, air supporting, filtration, sterilization, promptly finishes permanganate preoxidation and air supporting coupling and removes algae; Wherein the described coagulating agent of step 2 be, the mixture of Tai-Ace S 150, ferrous sulfate, iron(ic) chloride and polymerize aluminum chloride.
Closely knit stable, the scum layer free from extraneous odour of the scum layer that algae-containing water source water after present embodiment is handled forms, algae deactivation efficient height, the algae inactivation ratio reaches 85%.
Claims (8)
1. permanganate preoxidation and air supporting coupling remove the water treatment method of algae, it is characterized in that permanganate preoxidation and air supporting coupling remove the water treatment method of algae, carry out according to the following steps: one, permanganate is added to the water of algae-containing water source and carry out preoxidation, according to the water quality situation, the permanganate dosage is 0.2～5mg/L, and control permanganate preoxidation time is 5～60min; Two, dosing coagulant in the water after permanganate preoxidation then, the dosage of coagulating agent is 5～100mg/L, through coagulation, air supporting, filtration, sterilization, promptly finishes permanganate preoxidation and air supporting coupling and removes algae; Wherein the described permanganate of step 1 is one or both the mixture in potassium permanganate and the sodium permanganate.
2. permanganate preoxidation according to claim 1 and air supporting coupling remove the water treatment method of algae, it is characterized in that the permanganate dosage is 0.5～4mg/L in the step 1.
3. permanganate preoxidation according to claim 1 and air supporting coupling remove the water treatment method of algae, it is characterized in that the permanganate dosage is 1～3mg/L in the step 1.
4. permanganate preoxidation according to claim 1 and 2 and air supporting coupling remove the water treatment method of algae, it is characterized in that control permanganate preoxidation time is 10～50min in the step 1.
5. permanganate preoxidation according to claim 1 and 2 and air supporting coupling remove the water treatment method of algae, it is characterized in that control permanganate preoxidation time is 20～40min in the step 1.
6. permanganate preoxidation according to claim 4 and air supporting coupling remove the water treatment method of algae, it is characterized in that the described coagulating agent of step 2 is any one or a few mixture in aluminum chloride, Tai-Ace S 150, ferrous sulfate, ferric sulfate, iron(ic) chloride, poly-ferric chloride, polymerize aluminum chloride, the polyaluminium sulfate.
7. permanganate preoxidation according to claim 6 and air supporting coupling remove the water treatment method of algae, and the dosage that it is characterized in that coagulating agent in the step 2 is 10～80mg/L.
8. permanganate preoxidation according to claim 6 and air supporting coupling remove the water treatment method of algae, and the dosage that it is characterized in that coagulating agent in the step 2 is 30～70mg/L.
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| CN102701345A (en) * | 2012-05-21 | 2012-10-03 | 中国科学院生态环境研究中心 | Preoxidation-coagulation algae removing method based on in-situ generation of double coagulants |
| CN103449590A (en) * | 2013-09-11 | 2013-12-18 | 中国矿业大学 | Method for safely removing algae and settling algae based on bentonite |
| CN103896429A (en) * | 2014-03-06 | 2014-07-02 | 复旦大学 | Algae-water separation device and method applicable to lake improvement |
| CN104071921A (en) * | 2014-06-26 | 2014-10-01 | 合肥工业大学 | Algae-containing wastewater high-efficiency combined purification method |
| CN105417673A (en) * | 2015-11-16 | 2016-03-23 | 哈尔滨工业大学 | Method for utilizing singlet oxygen for removing algae |
| CN109772271A (en) * | 2019-03-14 | 2019-05-21 | 中国科学院生态环境研究中心 | Modified algae adsorbent of a kind of ferrimanganic and preparation method thereof |
| CN110002641A (en) * | 2019-03-29 | 2019-07-12 | 深圳市深水龙岗水务集团有限公司 | A kind of device and method of efficient removal Measures of Algae in Water Body |
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| CN102701346A (en) * | 2012-05-21 | 2012-10-03 | 中国科学院生态环境研究中心 | Method for pre-oxidizing and reinforcing coagulation of algae cells and controlling release of organic substances in algae cells |
| CN102701345A (en) * | 2012-05-21 | 2012-10-03 | 中国科学院生态环境研究中心 | Preoxidation-coagulation algae removing method based on in-situ generation of double coagulants |
| CN103449590A (en) * | 2013-09-11 | 2013-12-18 | 中国矿业大学 | Method for safely removing algae and settling algae based on bentonite |
| CN103896429A (en) * | 2014-03-06 | 2014-07-02 | 复旦大学 | Algae-water separation device and method applicable to lake improvement |
| CN103896429B (en) * | 2014-03-06 | 2015-10-28 | 复旦大学 | A kind of algae water separation device and method being applicable to lake treatment |
| CN104071921A (en) * | 2014-06-26 | 2014-10-01 | 合肥工业大学 | Algae-containing wastewater high-efficiency combined purification method |
| CN104071921B (en) * | 2014-06-26 | 2016-06-01 | 合肥工业大学 | A kind of containing algae waste water high-efficiency compound purifying method |
| CN105417673A (en) * | 2015-11-16 | 2016-03-23 | 哈尔滨工业大学 | Method for utilizing singlet oxygen for removing algae |
| CN105417673B (en) * | 2015-11-16 | 2017-11-03 | 哈尔滨工业大学 | A kind of method that utilization singlet oxygen removes algae |
| CN109772271A (en) * | 2019-03-14 | 2019-05-21 | 中国科学院生态环境研究中心 | Modified algae adsorbent of a kind of ferrimanganic and preparation method thereof |
| CN110002641A (en) * | 2019-03-29 | 2019-07-12 | 深圳市深水龙岗水务集团有限公司 | A kind of device and method of efficient removal Measures of Algae in Water Body |
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Application publication date: 20111228 |