CN102173495B - Method and device for accelerating removal of high-concentration phosphorus in waste water by using calcite - Google Patents
Method and device for accelerating removal of high-concentration phosphorus in waste water by using calcite Download PDFInfo
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- CN102173495B CN102173495B CN201110058765A CN201110058765A CN102173495B CN 102173495 B CN102173495 B CN 102173495B CN 201110058765 A CN201110058765 A CN 201110058765A CN 201110058765 A CN201110058765 A CN 201110058765A CN 102173495 B CN102173495 B CN 102173495B
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Abstract
The invention provides a method and device for accelerating removal of high-concentration phosphorus in waste water by using calcite and belongs to the technical field of environmental remediation. Specifically, the method for accelerating removal of high-concentration phosphorus in waste water by using calcite comprises the following steps of: adding calcite which is used as a phosphorus-removing agent into waste water containing high-concentration phosphorus, and then adding sulfates which are used as a phosphorus removal promoter. If the phosphorus removal promoter is added after stirring for a certain period of time, and the phosphorus removal rate is significantly increased. The method can effectively promote the removal of phosphorus, is simple and feasible and has high efficiency.
Description
Technical field
The water that the invention belongs in the environmental protection field pollutes treatment technology, particularly a kind ofly accelerates the method and apparatus that calcite removes waste water middle and high concentration phosphorus.
Background technology
In order to control the key factor phosphorus that causes body eutrophication, people continually develop out various dephosphorization techniques.Patent 03131590.9 discloses utilizes haydite as crystal seed, regulates pH8.5-10, makes calcium phosphate cover haydite surface dephosphorization.Patent 200710009855.0 discloses utilizes oyster shells as the calcium resource, is mixed and made into dephosphorization material with clay.Calcite is a novel natural dephosphorization material, distributes extensively at occurring in nature, and its staple is CaCO
3, the phosphorus in the water body is had phosphor-removing effect preferably.Existing research shows that calcite is suitable for bed mud and covers in the control phosphorus system, and can not cause secondary pollution.The phosphorus that is primarily aimed at lower concentration is used in the calcite dephosphorization both at home and abroad at present removal effect is preferably arranged.But the technology and the application that how to promote calcite to remove high concentration phosphorus at waste water do not appear in the newspapers.
Summary of the invention
Technical problem:The present invention is directed to and utilize calcite to remove waste water middle and high concentration phosphorus problem more slowly, a kind of with low cost, method and device thereof that technology is simply accelerated the removal of waste water middle and high concentration phosphorus are provided.
Technical scheme:A kind ofly accelerate the method that calcite is removed waste water middle and high concentration phosphorus, calcite is pulverized, be added in the waste water that contains high concentration phosphorus, in solution, add except that phosphorus accelerant, stir dephosphorization, said to remove phosphorus accelerant be vitriol.The pH value of waste water is acidity or pH >=11.Said vitriol is sodium sulfate, vitriolate of tartar, sodium pyrosulfate or sal enixum.The mol ratio of sulfate radical and phosphorus is not more than 4 under acidic conditions.PH >=11 o'clock, the promoter action of vitriol strengthens along with the increase of sulfate radical.
Accelerate calcite and remove the device of waste water middle and high concentration phosphorus; This device comprises reaction kettle, calcite storehouse, dry powder transfer roller, vitriol storage tank, volume pump and pressure filter, and the outlet of said calcite storehouse links to each other with first upper inlet of reaction kettle, and the dry powder transfer roller is located between calcite storehouse and the reaction kettle; Operational throughput in order to the control calcite; The outlet of vitriol storage tank links to each other with second upper inlet of reaction kettle, and the connecting tube of vitriol storage tank and reaction kettle is provided with second volume pump, and the outlet in phosphorus-containing wastewater storage pond links to each other with the lower inlet of reaction kettle; The connecting tube of phosphorus-containing wastewater storage pond and reaction kettle is provided with first volume pump; Reaction kettle first outlet links to each other with pressure filter, and the outlet of pressure filter links to each other with the calcium phosphate holding tank, and reaction kettle second outlet links to each other with the import of wastewater biochemical pond.Said reaction kettle is provided with whipping appts.
Beneficial effect:The present invention is under acidic conditions, and when the mol ratio of sulfate radical and phosphorus was not more than 4, the clearance of phosphorus can improve 15%; In pH>=11 o'clock, the promoter action of vitriol strengthens along with the increase of sulfate radical.This treatment process is simple, and effect is obvious.The mode that this device adopt to stir: with waste water and calcite, vitriol mixing, stir, accelerate calcite dephosphorization speed, and recovery obtains calcium phosphate salt.
Description of drawings:
Different amount sodium sulfate were to the influence (S/P=0.7 and 2.7) of calcite dephosphorization when Fig. 1 was pH=4.5
Different amount vitriolate of tartar were to the influence (S/P=0.7 and 1.3) of calcite dephosphorization when Fig. 2 was pH=4.5
Sulfate radical was to the kinetics (S/P=0.95) of calcite dephosphorization when Fig. 3 was pH=6
Different amount vitriolate of tartar were to the influence (S/P=2.7,4.7,6.7) of calcite dephosphorization when Fig. 4 was pH=13
Sulfate radical was to the kinetics (S/P=4.7) of calcite dephosphorization when Fig. 5 was pH=11
Sulfate radical was to the kinetics (S/P=6.7) of calcite dephosphorization when Fig. 6 was pH=13
Fig. 7 removes the device of waste water middle and high concentration phosphorus for a kind of calcite that promotes.Phosphorus-containing wastewater storage pond 1, the first volume pump 2 among the figure, reaction kettle 3, calcite storehouse 4, dry powder transfer roller 5, vitriol storage tank 6, the second volume pumps 7, pressure filter 8, calcium phosphate holding tank 9, wastewater biochemical pond 10.
Embodiment
Embodiment 1:
Calcite is collected in Zhenjiang stone flour factory, pulverizes, and crosses the 30-200 mesh.Take by weighing 1.0000 g calcites, place the 150mL Erlenmeyer flask, add pH=4.5 respectively, concentration is the phosphorus solution 50mL of 1000 mg/L (in P), add the sodium sulfate (S/P=0.7 and 2.7) of different amounts.Filter the back at 25 ℃ of following constant-temperature shaking 48 h and use molybdenum blue colorimetric method, survey phosphorus content wherein, calculate the clearance of calcite phosphorus.Hence one can see that, and the adding of sodium sulfate can promote the removal of phosphorus, do not compare with adding sulfate radical, and the clearance of phosphorus has improved 15%
Embodiment 2:
Calcite is collected in Zhenjiang stone flour factory, pulverizes, and crosses the 30-200 mesh.Take by weighing 1.0000 g calcites, place the 150mL Erlenmeyer flask, add pH=4.5 respectively, concentration is the phosphorus solution 50mL of 1000 mg/L (in P), add the vitriolate of tartar (S/P=0.7 and 1.3) of different amounts.Filter the back at 25 ℃ of following constant-temperature shaking 48 h and use molybdenum blue colorimetric method, survey phosphorus content wherein, calculate the clearance of calcite phosphorus.Hence one can see that, adds the removal that vitriolate of tartar can promote phosphorus, do not compare with adding sulfate radical, and the clearance of phosphorus has improved 9%
Embodiment 3:
Calcite is collected in Zhenjiang stone flour factory, pulverizes, and crosses the 30-200 mesh.Take by weighing 3.0000 g calcites and place the 1000mL Erlenmeyer flask, add pH and be 6, concentration is the phosphorus solution 1L of 1000mg/L, adds vitriolate of tartar; Make S/P=0.95,25 ℃ of lower magnetic forces stir, and take a sample at specified time; And survey phosphorus content wherein, calculate the clearance of calcite to phosphorus.Hence one can see that, when having sulfate radical to exist, the removal speed of phosphorus when not adding sulfate radical calcite to the removal speed of phosphorus.
Embodiment 4:
Calcite is collected in Zhenjiang stone flour factory, pulverizes, and crosses the 30-200 mesh.Take by weighing 1.0000 g 60-200 order calcite samples, place the 150mL Erlenmeyer flask, add pH=13 respectively, concentration is the phosphorus solution 50mL of 1000 mg/L (in P), add the vitriolate of tartar (S/P=2.7,4.7,6.7) of different amounts.Filter the back at 25 ℃ of following constant-temperature shaking 48 h and use molybdenum blue colorimetric method, survey phosphorus content wherein, calculate the clearance of calcite phosphorus.The clearance of phosphorus increases along with the increase of sulfate concentration, does not compare with adding sulfate radical, and the clearance of phosphorus has improved 27%.Hence one can see that, and when pH=13, the concentration of vitriolate of tartar is high more, can promote the removal of phosphorus more.
Embodiment 5:
Calcite is collected in Zhenjiang stone flour factory, pulverizes, and crosses the 30-200 mesh.Take by weighing 3.0000 g 60-200 order calcite samples; Place the 1000mL Erlenmeyer flask, add 1L pH and be 11, concentration is the phosphorus solution of 1000mg/L, the vitriolate of tartar addition is S/P=4.7; 25 ℃ of lower magnetic forces stir; In the specified time sampling, and survey phosphorus content wherein, calculate the clearance of calcite phosphorus.Hence one can see that, when pH=11, when having sulfate radical to exist, the removal speed of phosphorus when not adding sulfate radical and exist calcite to the removal speed of phosphorus.
Embodiment 6:
Calcite is collected in Zhenjiang stone flour factory, pulverizes, and crosses the 30-200 mesh.Take by weighing 20.000 g 60-200 order calcite samples; Place the 1000mL Erlenmeyer flask, add 1L pH and be 13, concentration is the phosphorus solution of 1000mg/L, the sal enixum addition is S/P=6.7; 25 ℃ of lower magnetic forces stir; In the specified time sampling, and survey phosphorus content wherein, calculate the clearance of calcite phosphorus.Hence one can see that, and when pH=13, sal enixum can quicken the removal speed of calcite to phosphorus.
Embodiment 7:
A kind of device that promotes that calcite is removed waste water middle and high concentration phosphorus; This device comprises reaction kettle 3, calcite storehouse 4, dry powder transfer roller 5, vitriol storage tank 6, volume pump and pressure filter 8, and 4 outlets of said calcite storehouse link to each other with first upper inlet of reaction kettle 3, and dry powder transfer roller 5 is located between calcite storehouse 4 and the reaction kettle 3; Operational throughput in order to the control calcite; The outlet of vitriol storage tank 6 links to each other with second upper inlet of reaction kettle 3, and vitriol storage tank 6 is provided with second volume pump 7 with the connecting tube of reaction kettle 3, and the outlet in phosphorus-containing wastewater storage pond 1 links to each other with the lower inlet of reaction kettle 3; Phosphorus-containing wastewater storage pond 1 is provided with first volume pump 2 with the connecting tube of reaction kettle 3; Reaction kettle 3 first outlets link to each other with pressure filter 8, and the outlet of pressure filter links to each other with calcium phosphate holding tank 9, and reaction kettle 3 second outlets link to each other with 10 imports of wastewater biochemical pond.Said reaction kettle 3 is provided with whipping appts.
Claims (1)
1. accelerate the method that calcite is removed waste water middle and high concentration phosphorus for one kind, it is characterized in that calcite is pulverized, cross the 30-200 mesh sieve; Be added to the pH value and be 4.5 and be in the phosphorus solution of 1000 mg/L in P concentration, wherein said calcite is 1.0000 g, phosphorus solution 50mL; In solution, add except that phosphorus accelerant; Stir dephosphorization, said to remove phosphorus accelerant be sodium sulfate, and S/P is 2.7 under acidic conditions.
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| CN102432083B (en) * | 2011-10-28 | 2013-06-05 | 上海海洋大学 | Method for removing and recovering phosphate in waste water |
| CN103466728A (en) * | 2013-09-02 | 2013-12-25 | 苏州富奇诺水治理设备有限公司 | Wastewater treating agent containing calcite powder |
| CN106587544B (en) * | 2017-02-09 | 2023-03-14 | 山东建筑大学 | Enhanced phosphorus removal and sludge reduction type sewage treatment device |
| CN111470555A (en) * | 2020-04-23 | 2020-07-31 | 立达超微工业（苏州）有限公司 | Device for promoting removal of high-concentration phosphorus in wastewater by calcite |
| CN112321019A (en) * | 2020-10-30 | 2021-02-05 | 南京信息工程大学 | Purification method for reducing phosphorus content in biogas slurry by using calcite |
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| CN201678504U (en) * | 2010-04-07 | 2010-12-22 | 中国科学院南京土壤研究所 | High-concentration ammonia nitrogen waste water treatment device |
| CN101875519A (en) * | 2010-07-01 | 2010-11-03 | 南通江山农药化工股份有限公司 | Organic phosphorus pesticide waste water recycling process |
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| 盛夏等."方解石对水中磷的去除效果研究".《环境工程学报》.2010,第4卷(第11期),第2461-2465页. |
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