CN101333024A - Quantitative applications process of natural mineral for dephosphorization for rich-phosphorus water body and phosphorus recovery - Google Patents
Quantitative applications process of natural mineral for dephosphorization for rich-phosphorus water body and phosphorus recovery Download PDFInfo
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- CN101333024A CN101333024A CNA2008100208837A CN200810020883A CN101333024A CN 101333024 A CN101333024 A CN 101333024A CN A2008100208837 A CNA2008100208837 A CN A2008100208837A CN 200810020883 A CN200810020883 A CN 200810020883A CN 101333024 A CN101333024 A CN 101333024A
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Abstract
The invention provides a quantitative technique which adopts natural minerals to remove phosphorus (recycling phosphorus) in a phosphorus-rich water body. Calcite and gypsum powder with the particle size of 300-500 meshes are weighed respectively and blended according to a mass ratio of 4:1-10:1; when the reaction time is 10 hours, in a solution with initial phosphorus concentration of 10mg/L-2mg/L, the effective total phosphorous removal amount corresponding to each gram of gypsum powder is 4.7mg-0.7mg; meanwhile, a relation curve between gypsum dosage and the maximum value of effective total phosphorous removal amount is formed. The technique uses the mixed minerals quantitatively, so that the phosphorus removal performance of the mixed minerals can reach the maximal limitation; the technique not only can be used for removing phosphorus (recycling phosphorus) from the phosphorus-rich supernatant fluid at the terminal of the municipal sewage treatment, but also can be applied to the phosphorus removal (recycling phosphorus) of rural distributed domestic sewage, eutrophic lake water bodies, and large, medium, and small landscape water bodies.
Description
Technical field
The invention belongs to the field of environment protection of the recycle of environmental protection mineral material and mineral, refer in particular to the quantitative Application method of the specified proportion mixture of two kinds of natural mineral dephosphorization for rich-phosphorus water body and recovery phosphorus.
Background technology
Phosphorus is the main inducible factor of body eutrophication, so in the process of the serious day by day global eutrophication problem of reply, at first should pay attention to the control to phosphorus.
In developed country, the processing of phosphor in sewage is paid much attention to, especially pay attention in trade effluent and domestic sewage treating process, the recycling of phosphorus; And developed sophisticated relatively recovery technology--with inorganic mineral struvite (the magnesium ammonium phosphate MgNH of phosphorus
4PO
46H
2O is commonly called as struvite or MAP) and the calcium phosphate technology be main.For example, MAP (being commonly called as struvite) crystallization retrieving arrangement has been installed by gondola Treviso sewage work on sludge dewatering supernatant liquor circuit, and the rate of recovery is 54%, and this technology is in calendar year 2001 putting into production property operation; Britain Slough sewage work handles the sludge dewatering supernatant liquor with the MAP settler, and goes into operation in 2002, is 80% to the rate of recovery of soluble phosphate; Holland Geestmerambacht Sewage Plant adopts the Crystalactor technology to reclaim calcium phosphate.
In China, many scholars study dephosphorization and phosphorus recycle from different angles, and still, majority still rests on breadboard conceptual phase.The main reference document:
1. Wang Hui chastity, Wang Shaogui. reclaim phosphorus research with the calcium phosphate salt form from Sewage Plant. Chinese water supply and drainage, 2006,122 (9): 93～96;
2. Sun Boya, Chen Hongbin, the progress that 2007. sewage disposal phosphorus reclaim. Sichuan environment, 26 (1): 90～94.
At present, there is following problem in dephosphorization (recovery phosphorus) method of developed country's employing:
1. the struvite of developed country's employing and calcium phosphate (phosphatic rock) mineral recovery method are mainly used in the recovery to phosphorus in trade effluent and the city domestic sewage dephosphorization process, but can't remove and recycle the phosphorus in the eutrophication water (for example nutrition-enriched water of lake, rural area dispersant type domestic wastewater, scenic spot rich-phosphorus water body).
2. the form dephosphorization (recovery phosphorus) with struvite is by adding chemical reagent such as MgCl, shortcoming is that running cost is very high, and require operation (this is impossible) under higher pH (pH＞9) background in the nature water body, so Application Prospect remains further to be studied.
3. the form dephosphorization (recovery phosphorus) with calcium phosphate (phosphatic rock) is by adding Ca (OH)
2, chemical reagent such as NaOH, not only cost is higher, also exists operational conditions to require harsh problem simultaneously, is difficult to carry out the large-scale production operation of nature rich-phosphorus water body.
4. aforesaid method is not to also realizing real quantitative Treatment, and the maturity of technology awaits further exploitation.
Summary of the invention
The novel method that the purpose of this invention is to provide the quantitative natural mineral powder of a kind of usefulness mixture dephosphorization in rich-phosphorus water body (recovery phosphorus); Dephosphorization (recovery phosphorus) rate height, and the conditional request of operation is low, cost is low, not only can be used for dephosphorization, the recovery phosphorus of municipal effluent, can also be applied to nutrition-enriched water of lake, the rural area decentralized type sewage, the dephosphorization of the eutrophic landscape water body of large, medium and small type, recovery phosphorus
Realize the above-mentioned purpose technical scheme:
Take by weighing calcite and gypsum powder respectively, particle diameter is at the 300-500 order, mix by 4: 1～10: 1 mass ratioes, place the 100mL Erlenmeyer flask, add the solution that initial phosphorus concentration is 10mg/L～2mg/L respectively, put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, 10 hours reaction times, get its supernatant liquor, survey the concentration of its phosphorus with the ammonium molybdate spectrophotometry.Then, supernatant liquor in the Erlenmeyer flask is removed, and the remaining mixed mineral powder oven dry in the Erlenmeyer flask, adding the phosphorus starting point concentration more respectively is the solution 100mL of 10mg/L～2mg/L, reaction repeated under these conditions, when the effect of its dephosphorization (recovery phosphorus) is low till.Wherein in the mixed mineral, the maximum effectively dephosphorization amount of every 1g gypsum correspondence is 4.7mg～0.7mg.
Beneficial effect:
(1) effect of this technology dephosphorization (recovery phosphorus) can reach 89～95% or higher; The phosphorus balance concentration of handling the back water body is about 0.2mg/L.
(2) determined the injected volume of mixed mineral and the relation of effective dephosphorization total amount, made dephosphorization (recovery phosphorus) the realization quantification of rich-phosphorus water body (different phosphate concentration) is controlled, and make the dephosphorization ability of mixed mineral powder reach to greatest extent; Promptly determined the effective dephosphorization total amount and the positive correlation of gypsum consumption of mixed mineral, and clear regularity has been arranged.
(3) this technology can make and corresponding water body trend neutralisation (pH value convergence about 7.5) development make water body optimization, can not form secondary pollution again, and is easy to use.
(4) advantage compared with external existing technology of the present invention is: the natural mineral with cheapness carries out mixing match, do not need to add any chemical agent, dephosphorization, the recovery phosphorus that not only can be used for municipal effluent, can also be applied to nutrition-enriched water of lake, the rural area decentralized type sewage, the dephosphorization of the eutrophic landscape water body of large, medium and small type, recovery phosphorus.Cost only is equivalent to the 1/10-1/12 of existing technology abroad.
Description of drawings
Fig. 1 gypsum consumption and effective dephosphorization total amount dependency synoptic diagram
In initial phosphorus concentration is respectively solution at 10mg/L～2mg/L, at the mineral particle diameter under 4: 1～10: 1 the condition of mass ratio of 300～500 orders, 10 hours reaction times, calcite/gypsum, the maximum effectively dephosphorization total amount of every 1g gypsum is 4.7mg～0.7mg, and has constituted a gypsum consumption and effective peaked relation curve of dephosphorization total amount.
Embodiment:
(particle diameter of calcite is 325 orders to get the mixed mineral powder 3g of 4: 1 (mass ratio of calcite/gypsum) ratios, the particle diameter of gypsum is 500 orders), place the 100mL Erlenmeyer flask, add the solution that initial phosphorus concentration is 10mg/L, pH regulator to 7.5 is put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, temperature is made as 30 ℃, reacts after 10 hours and takes out, and gets its supernatant liquor test.Then, the supernatant liquor in the Erlenmeyer flask is removed, the remaining mixed mineral powder oven dry in the Erlenmeyer flask, adding the phosphorus starting point concentration again is the solution 100mL of 10mg/L, repeated experiments under these conditions, when the effect of its dephosphorization (recovery phosphorus) is low till.Last effective dephosphorization total amount is 2.796mg, effectively dephosphorization total amount and the dependency of gypsum be the corresponding 4.66mg of 1g gypsum (table 1, No.1).
(particle diameter of calcite is 325 orders to get the mixed mineral powder 10g of 15: 1 (mass ratio of calcite/gypsum) ratios, the particle diameter of gypsum is 500 orders), place the 100mL Erlenmeyer flask, add the solution that initial phosphorus concentration is 10mg/L, pH regulator to 7.5 is put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, temperature is made as 30 ℃, reacts after 10 hours and takes out, and gets its supernatant liquor test.Then, the supernatant liquor in the Erlenmeyer flask is removed, the remaining mixed mineral powder oven dry in the Erlenmeyer flask, adding the phosphorus starting point concentration again is the solution 100mL of 10mg/L, repeated experiments under these conditions, when the effect of its dephosphorization (recovery phosphorus) is low till.Last effective dephosphorization total amount is 2.830mg, effectively dephosphorization total amount and the dependency of gypsum be the corresponding 4.72mg of 1g gypsum (table 1, No.2).(present embodiment has illustrated that at initial phosphorus concentration be in the 10mg/L solution, and the mass ratio of calcite/gypsum is under 4: 1～15: 1 condition, and the gypsum consumption all is stabilized in about 4.7 with the maximum correlation coefficient of effective dephosphorization total amount).
(particle diameter of calcite is 325 orders to get the mixed mineral powder 5g of 4: 1 (mass ratio of calcite/gypsum) ratios, the particle diameter of gypsum is 500 orders), place the 100mL Erlenmeyer flask, add the solution that initial phosphorus concentration is 4mg/L, pH regulator to 7.5 is put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, temperature is made as 30 ℃, reacts after 10 hours and takes out, and gets its supernatant liquor test.Then, the supernatant liquor in the Erlenmeyer flask is removed, the remaining mixed mineral powder oven dry in the Erlenmeyer flask, adding the phosphorus starting point concentration again is the solution 100mL of 4mg/L, repeated experiments under these conditions, when the effect of its dephosphorization (recovery phosphorus) is low till.Last effective dephosphorization total amount is 1.748mg, effectively dephosphorization total amount and the dependency of gypsum be the corresponding 1.75mg of 1g gypsum (table 1, No.3).
Getting the mass ratio of 4: 1 calcite/gypsum respectively) (particle diameter of calcite is 800 orders for the mixed mineral powder 5g of ratio, the particle diameter of gypsum is 500 orders), place the 100mL Erlenmeyer flask, add the solution that initial phosphorus concentration is 2mg/L, pH regulator to 7.5 is put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, temperature is made as 30 ℃, reacts after 10 hours and takes out, and gets its supernatant liquor test.Then, the supernatant liquor in the Erlenmeyer flask is removed, the remaining mixed mineral powder oven dry in the Erlenmeyer flask, adding the phosphorus starting point concentration again is the solution 100mL of 2mg/L, repeated experiments under these conditions, when the effect of its dephosphorization (recovery phosphorus) is low till.Last effective dephosphorization total amount is 0.707mg, effectively dephosphorization total amount and the dependency of gypsum be the corresponding 0.707mg of 1g gypsum (table 1, No.4).(in the present embodiment, the particle diameter of calcite is 800 orders, the 300-500 purpose particle diameter that limits than the present invention is thinner, be for further checking: the relation conefficient of the consumption of gypsum and effective dephosphorization total amount is more stable in certain density phosphorus solution, and very low with the particle diameter degree of correlation of calcite).
(particle diameter of calcite is 325 orders to get the mixed mineral powder 5g of 9: 1 (mass ratio of calcite/gypsum) ratios respectively, the particle diameter of gypsum is 500 orders), place the 100mL Erlenmeyer flask, add the solution that initial phosphorus concentration is 2mg/L, pH regulator to 7.5 is put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, temperature is made as 30 ℃, reacts after 10 hours and takes out, and gets its supernatant liquor test.Then, the supernatant liquor in the Erlenmeyer flask is removed, the remaining mixed mineral powder oven dry in the Erlenmeyer flask, adding the phosphorus starting point concentration again is the solution 100mL of 2mg/L, repeated experiments under these conditions, when the effect of its dephosphorization (recovery phosphorus) is low till.Last effective dephosphorization total amount is 0.307mg, effectively dephosphorization total amount and the dependency of gypsum be the corresponding 0.61mg of 1g gypsum (table 1, No.5).
Embodiment 6.
(particle diameter of calcite is 325 orders to get the mixed mineral powder 5g of 19: 1 (mass ratio of calcite/gypsum) ratios respectively, the particle diameter of gypsum is 500 orders), place the 100mL Erlenmeyer flask, the solution that adds initial phosphorus concentration 2mg/L, pH regulator to 7.5 is put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, temperature is made as 30 ℃, reacts after 10 hours and takes out, and gets its supernatant liquor test.Then, the supernatant liquor in the Erlenmeyer flask is removed, the remaining mixed mineral powder oven dry in the Erlenmeyer flask, adding the phosphorus starting point concentration again is the solution 100mL of 2mg/L, repeated experiments under these conditions, when the effect of its dephosphorization (recovery phosphorus) is low till.Last effective dephosphorization total amount is 0.181mg, effectively dephosphorization total amount and the dependency of gypsum be the corresponding 0.72mg of 1g gypsum (table 1, No.6).(present embodiment in conjunction with the embodiments 4,5 has illustrated that at initial phosphorus concentration be in the 2mg/L solution, and the mass ratio of calcite/gypsum is under 4: 1～9: 1～19: 1 condition, and the gypsum consumption all is stabilized in about 0.7 with the effective maximum correlation coefficient of dephosphorization total amount).
The main test data of experiment table look-up of table 1
1) with the method for calculation of gypsum dependency: the effective gypsum usage quantity in dephosphorization total amount (∑ p)/experiment
2) with the method for calculation of calcite dependency: the effective calcite usage quantity in dephosphorization total amount (∑ p)/experiment
3) with the method for calculation of mineral total amount dependency: the effective total usage quantity of mineral in dephosphorization total amount (∑ p)/experiment
Annotate: the data that have * are disallowable when calculating the available phosphorus total amount, the standard of rejecting is: at initial phosphorus concentration is in the solution of 4-10mg/L, phosphorus balance concentration＞the 1mg/L of the solution after the processing is in the solution of 2mg/L at initial phosphorus concentration, the solution phosphorus balance concentration＞0.5mg/L after the processing.
Claims (1)
1. natural mineral is to the dephosphorization of rich-phosphorus water body and the quantivative approach of recovery phosphorus, it is characterized in that it takes by weighing calcite and gypsum powder respectively, particle diameter is between the 300-500 order, mix by 4: 1～10: 1 mass ratioes, place the 100mL Erlenmeyer flask respectively, add the solution that initial phosphorus concentration is 10mg/L～2mg/L respectively, pH regulator to 7.5, put into constant temperature oscillator, rotating speed is 150 commentaries on classics/min, and temperature is 30 ℃, and the reaction times is 10 hours, to with a kind of mixed mineral reaction repeated with this understanding, effective dephosphorization total amount of wherein every 1g gypsum consumption correspondence is 4.7mg～0.7mg.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276039A (en) * | 2011-05-17 | 2011-12-14 | 桂林理工大学 | Method for removing phosphorus from phosphorus-rich water body by natural mineral mixture |
| CN108423784A (en) * | 2018-04-28 | 2018-08-21 | 大唐环境产业集团股份有限公司 | A method of controlling water systems'phosphorus element pollution using desulfurated plaster |
| CN110498496A (en) * | 2018-05-16 | 2019-11-26 | 广西机电工业学校 | Technique for applying of the natural minerals to rich-phosphorus water body or sewage dephosphorization and recycling phosphorus |
| CN110894095A (en) * | 2018-05-15 | 2020-03-20 | 广西机电工业学校 | Quantitative application process of natural minerals for removing phosphorus from phosphorus-rich water body |
-
2008
- 2008-07-30 CN CNA2008100208837A patent/CN101333024A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102276039A (en) * | 2011-05-17 | 2011-12-14 | 桂林理工大学 | Method for removing phosphorus from phosphorus-rich water body by natural mineral mixture |
| CN108423784A (en) * | 2018-04-28 | 2018-08-21 | 大唐环境产业集团股份有限公司 | A method of controlling water systems'phosphorus element pollution using desulfurated plaster |
| CN108423784B (en) * | 2018-04-28 | 2021-11-19 | 大唐环境产业集团股份有限公司 | Method for controlling phosphorus element pollution of water body by using desulfurized gypsum |
| CN110894095A (en) * | 2018-05-15 | 2020-03-20 | 广西机电工业学校 | Quantitative application process of natural minerals for removing phosphorus from phosphorus-rich water body |
| CN110498496A (en) * | 2018-05-16 | 2019-11-26 | 广西机电工业学校 | Technique for applying of the natural minerals to rich-phosphorus water body or sewage dephosphorization and recycling phosphorus |
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Open date: 20081231 |