CN103723831A - Application of forsterite as phosphorus-removing substrate material - Google Patents
Application of forsterite as phosphorus-removing substrate material Download PDFInfo
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- CN103723831A CN103723831A CN201210384855.XA CN201210384855A CN103723831A CN 103723831 A CN103723831 A CN 103723831A CN 201210384855 A CN201210384855 A CN 201210384855A CN 103723831 A CN103723831 A CN 103723831A
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- forsterite
- dephosphorization
- substrate material
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Abstract
The invention relates to a phosphorus-removing substrate material, and especially relates to application of forsterite as an efficient environment-friendly stable phosphorus-removing substrate material. By utilizing the forsterite characteristics of being stable in performance, capable of efficiently removing phosphorus, low in cost and the like, forsterite can be directly applied to constructed wetland or filter tanks as the phosphorus-removing substrate material for removing phosphorus from sewage plant secondary bio-chemical effluent or slightly-polluted river water, and also can be used as one raw material of a composite filling material and applied to constructed wetland as the phosphorus-removing substrate material for removing phosphorus from sewage plant secondary bio-chemical effluent or slightly-polluted river water. By applying forsterite to constructed wetland and filter tanks as the as the phosphorus-removing substrate material, the effluent total phosphorus (phosphates) concentration is better than that of IV-class water quality standard of "Environmental quality standards for surface water" (GB3838-2002), so that the risk of eutrophication of receiving water is substantially reduced, and the water body environment is improved.
Description
Technical field
The present invention relates to dephosphorization substrate material, the application of particularly a kind of efficient, environmental protection, the stable forsterite as dephosphorization substrate material (forsterite).
Background technology
Since reform and opening-up, although wastewater treatment in China has obtained rapid progress, the quality of water environment of China allows of no optimist, and the situation is tense in water prevention and cure of pollution.According to < < China Environmental State Bulletin > > in 2011, whole nation surface water pollution is still heavier, seven large water systems are totally slight pollution, and lake (reservoir) eutrophication problem is outstanding.Therefore, the control of body eutrophication has become the hot issue that people pay close attention to.Body eutrophication is mainly due to N, the P concentration in water body increases.Quantity research shows greatly, and the concentration of controlling P in water body is to control the key factor of body eutrophication.As typical Ecological Disposal technology, artificial swamp is widely used in the fields such as the purification of water quality of polluted-water and recovery, pollution of area source control, there is the advantages such as invest and maintenance cost is low, effluent quality is good, secondary pollution is little, one of effective technique of subduing water body nitrogen and phosphorus pollutants, it not only can meet the water quality requirement of denitrogenation dephosphorizing, and can significantly cut down the pollution load that enters receiving water body, the water quality demand that ensures to a certain extent receiving water body, has good environment, economic benefit.
Artificial swamp (constructed wetland, CW) is a kind of ecosystem that the artificial material cycle of utilizing plant, matrix and microorganism three of building and flow of energy are disposed of sewage.Phosphorus is one of nutrient limitation main in artificial swamp, and artificial swamp mainly relies on the physics chemical action of matrix to the removal of phosphorus, excessive this three aspects: of phosphorus effect of taking the photograph of the normal assimilation of the sorption of plant and microorganism and polyP bacteria has been used for.Wherein, matrix is acknowledged as the final home to return to of the phosphorus that enters wet land system always, and its precipitation and adsorption are the topmost removal approach of phosphorus element, and contribution rate is up to 70 ~ 87%.Phosphor-removing effect and the matrix type of artificial swamp are closely related, and the physico-chemical property of matrix and specific adsorptive power affect the removal of phosphorus.Be rich in Al
3+, Fe
3+, Ca
2+matrix can reach good phosphor-removing effect by absorption and precipitin reaction, and magnesium to be sorbent material also have good removal ability to the phosphoric acid salt in water.Therefore, selecting suitable artificial swamp substrate material, is to build artificial swamp, the crucial behave that improves Constructed Wetland For Purifying ability.
At present, people have inquired into multiple natural materials or have carried out strengthened artificial wet land adsorption and dephosphorization effect through the natural materials of physics, chemical modification and the material of synthetic.But all there is corresponding problem, comprise that character is unstable, efficiency is low, injected volume greatly, easily causes secondary pollution of water etc.
Forsterite (forsterite) is as high performance refractory, and with low cost, stable in properties, has good dephosphorization potentiality as rich magnesium material.At present, utilize forsterite as a kind of efficient dephosphorization material and apply in practice, there is not yet report at home and abroad.
Summary of the invention
The object of the invention is to apply forsterite (forsterite) as a kind of dephosphorization substrate material.
The application of the forsterite as dephosphorization substrate material of the present invention, be utilize forsterite there is stable performance, efficient dephosphorization, with low cost etc. feature, both can be directly using forsterite for artificial swamp or be applied in filter tank as dephosphorization substrate material the dephosphorization to Sewage Plant secondary biochemical effluent or micro-polluted river water; Also one of raw material that can be using forsterite as compounded mix for artificial swamp as dephosphorization substrate material, the dephosphorization to Sewage Plant secondary biochemical effluent or micro-polluted river water.Application forsterite is as the dephosphorization substrate material in artificial swamp and filter tank, water outlet total phosphorus (phosphoric acid salt) concentration is better than the IV class water quality standard of < < water environment quality standard > > (GB3838-2002), can greatly reduce the danger of receiving water body eutrophication, improve water body environment.
Described is directly used for artificial swamp as dephosphorization substrate material using forsterite, and wherein in artificial swamp, the filling proportion of forsterite is 28.15 ~ 47.20kgm
-2(unit surface filling quality).The artificial swamp of having filled forsterite can efficient dephosphorization, and intensity is high, stable in properties, to water body non-secondary pollution risk, forsterite can be used widely as artificial swamp dephosphorization substrate material.
Described directly forsterite being applied in filter tank as dephosphorization substrate material, the porosity of wherein having filled in the filter tank of forsterite is 48 ~ 53%.
One of described raw material using forsterite as compounded mix for artificial swamp as dephosphorization substrate material, that each filler in compounded mix is filled from feed-water end to water side successively according to water (flow) direction in syllogic dephosphorization system, by fixing filling proportion, tile respectively and be filled in syllogic dephosphorization system, first paragraph dephosphorization system in described syllogic dephosphorization system starts to fill respectively zeolite, hard coal, slag and biological ceramic particle from top to bottom from feed-water end, the zeolite of filling: hard coal: slag: the volume ratio of biological ceramic particle is 1:1 ~ 2:1:1; From the feed-water end of the second segment dephosphorization system of described syllogic dephosphorization system, filled biomass haydite, forsterite and hard coal respectively from the bottom to top, the biological ceramic particle of filling: forsterite: anthracitic volume ratio is 1 ~ 2:1:1; From the feed-water end of the 3rd section of dephosphorization system of described syllogic dephosphorization system, fill respectively zeolite and biological ceramic particle from top to bottom, the zeolite of filling: the volume ratio of biological ceramic particle is 3 ~ 4:1.
Described forsterite is common on market, is easy to obtain, and belongs to a kind of in olivine group, rhombic system, and particle diameter is 2 ~ 3mm, belongs to orthosilicate (Mg.Fe)
2siO
4molecular structure material, is rich in MgO, and the mass percentage content of Mg element is 26.02 ~ 27.31%, and forms through 1300 ℃ of calcinings.
The present invention develops forsterite first as a kind of new and effective dephosphorization substrate material, both can be used for artificial swamp, can be used for again filter tank, its feature is efficiently, stablizes, environmental protection, low cost, its phosphorus adsorptive capacity is up to 200mg/kg, the dynamic adsorption phosphor-removing effect of Filter column remains on 80% left and right, the PO of lab scale artificial swamp
4 3--P average removal rate is 88.87 ± 9.49%, and phosphor-removing effect is remarkable.
Accompanying drawing explanation
Fig. 1. the SEM photo before and after the forsterite Phosphate Sorption hydrochlorate of the embodiment of the present invention 1; Wherein: A is the SEM photo before forsterite-Phosphate Sorption hydrochlorate; B is the SEM photo after forsterite-Phosphate Sorption hydrochlorate.
Fig. 2. the X-ray energy spectrum analysis chart before and after the forsterite Phosphate Sorption hydrochlorate of the embodiment of the present invention 1; Wherein: A is the X-ray energy spectrum analysis chart before forsterite Phosphate Sorption hydrochlorate; X-ray energy spectrum analysis chart after B forsterite Phosphate Sorption hydrochlorate.
Fig. 3. the isothermal adsorption curve of the forsterite of the embodiment of the present invention 1.
Fig. 4. the dynamic phosphorus removal effect of the Filter column of the filling forsterite of the embodiment of the present invention 2.
Fig. 5. the filling schematic diagram (sectional view) of the lab scale Performance of Constructed Wetlands Substrates of the embodiment of the present invention 3.
Fig. 6. the lab scale artificial swamp test PO of the embodiment of the present invention 3
4 3-the removal effect of-P.
Reference numeral
A. zeolite B. hard coal C. slag D. biological ceramic particle E. forsterite
Embodiment
Below in conjunction with specific embodiment, the invention will be further described, but the present invention is not limited to following examples.
Utilize forsterite as a kind of new and effective dephosphorization substrate material, adopt the phosphorus absorption property of static bulge test research forsterite.Adopt 0.02molL
-1the KH of KCl solution preparation different phosphate concentration
2pO
4standardized solution (in P, lower same) 200mL, containing phosphorus concentration (PO
4 3--P) be respectively 1.0mgL
-1, 2.0mgL
-1, 5.0mgL
-1, 10mgL
-1, 20mgL
-1, 50mgL
-1, 100mgL
-1, 200mgL
-1, 400mgL
-1, be placed in respectively 250mL Erlenmeyer flask, according to quality/volumetric ratio 1:20, add respectively 10g forsterite (particle diameter is 2 ~ 3mm, and the mass percentage content of Mg element is 26.02 ~ 27.31%), (150rmin in constant-temperature table
-1, under 25 ℃ ± 1 ℃ of condition) continuous oscillation 48 hours, vibration finishes post-sampling, the water sample after absorption is with analyzing after 0.45 μ m membrane filtration, calculating forsterite is to phosphatic adsorptive capacity.In order further to inquire into the impact of forsterite on phosphoric Adsorption effect, the surface microstructure before and after it is adsorbed and constituent content have carried out detecting to be analyzed.As shown in Figure 1, before absorption, forsterite surface presents lens structure, comparatively smooth, and its Surface Creation grainy texture after absorption forms phosphorus xln.Ultimate analysis figure (see figure 2) before and after contrast absorption is known, and before absorption, forsterite be take the elements such as O, Mg, Si as main, take O, Si element as main after absorption, and Mg constituent content declines to a great extent, and P constituent content slightly increases; Declining to a great extent of Mg element illustrates that it exists as the principal element of dephosphorization to a certain extent.The isothermal adsorption curve of this material is shown in Fig. 3.Utilize Langmuir equation to carry out linear fit to the data in Fig. 3, known according to this equation, forsterite is 169.49mgkg to the equilibrium adsorption capacity of phosphorus
-1.
Utilize forsterite as a kind of efficient dephosphorization substrate material, for Filter column dephosphorization.Adopt synthetic glass post (Φ 75 * 600mm) to fill forsterite (porosity that filling virtual height 580mm has filled in the synthetic glass post of forsterite is 52%), to having filled in the synthetic glass post of forsterite, inject the secondary biochemical effluent (PO of sewage work continuously
4 3--P concentration: 1.03 ± 0.58mg/L), operation first day, water outlet PO
4 3--P concentration is only 0.085mg/L; After 136 bed volumes of operation, phosphoric acid salt average removal rate is 79.63% continuously, average water outlet PO
4 3--P concentration is 0.23mg/L, and water outlet mean ph value is 7.21, show forsterite can be efficiently, the phosphoric acid salt in environmental protection, steady removal secondary biochemical effluent.The dynamic phosphorus removal effect of Filter column is shown in Fig. 4.
Embodiment 3
Utilize forsterite as a kind of efficient dephosphorization substrate material, for artificial swamp dephosphorization, it is 36.79kgm that filling proportion closes
-2(unit surface filling quality).With syllogic dephosphorization system simulation artificial swamp, carry out denitrogenation dephosphorizing, and in syllogic dephosphorization system filled composite filler, each filler is filled (as shown in Figure 5) according to water (flow) direction in syllogic dephosphorization system successively from feed-water end to water side, by fixing filling proportion, tile respectively and be filled in syllogic dephosphorization system, testing syllogic dephosphorization system used is a container of being made by PVC plate, be of a size of 0.6m * 0.5m * 0.3m(length * wide * height), in this container, with PVC plate, be divided into 3 lattice sections, the length of every lattice section is 0.2m.Because the length of simulated person's work wetland is shorter, therefore the bottom gradient of syllogic dephosphorization system is not set, described syllogic dephosphorization system is placed in stainless steel shelf with assurance level.In simulated person's work wetland, plant floral leaf reed (Arundo donax var.versicolor), every lattice section is planted 2 strains.The first lattice section dephosphorization system in described syllogic dephosphorization system starts to fill respectively zeolite, hard coal, slag and biological ceramic particle from top to bottom from feed-water end, the zeolite of filling: hard coal: slag: the volume ratio of biological ceramic particle is 1:1:1:1; From the feed-water end of the second lattice section dephosphorization system of described syllogic dephosphorization system, filled biomass haydite, forsterite and hard coal respectively from the bottom to top, the biological ceramic particle of filling: forsterite: anthracitic volume ratio is 2:1:1; From the feed-water end of the 3rd lattice section dephosphorization system of described syllogic dephosphorization system, fill respectively zeolite and biological ceramic particle from top to bottom, the zeolite of filling: the volume ratio of biological ceramic particle is 3:1.Filler is filled total height 36cm.First current start from the first lattice section feed-water end is downstream, current change up stream into after the first lattice section water side enters into the second lattice section, current change downstream into after the second lattice section water side enters into the 3rd lattice section, and testing syllogic dephosphorization system used, to be provided with overflow port stable with highest safety stage.It is 36Ld that lab scale artificial wet land system is processed the water yield
-1, hydraulic load is 0.2md
-1, the theoretical water power residence time is 1 day.During test run, this system PO
4 3--P average removal rate is 88.87 ± 9.49%, and phosphor-removing effect is remarkable.
Claims (5)
1. as an application for the forsterite of dephosphorization substrate material, it is characterized in that: directly using forsterite for artificial swamp or be applied in filter tank as dephosphorization substrate material the dephosphorization to Sewage Plant secondary biochemical effluent or micro-polluted river water; Or one of the raw material using forsterite as compounded mix for artificial swamp as dephosphorization substrate material, the dephosphorization to Sewage Plant secondary biochemical effluent or micro-polluted river water.
2. application according to claim 1, is characterized in that: described is directly used for artificial swamp as dephosphorization substrate material using forsterite, and wherein in artificial swamp, the filling proportion of forsterite is 28.15 ~ 47.20kgm
-2.
3. application according to claim 1, is characterized in that: described directly forsterite being applied in filter tank as dephosphorization substrate material, the porosity of wherein having filled in the filter tank of forsterite is 48 ~ 53%.
4. application according to claim 1, it is characterized in that: one of described raw material using forsterite as compounded mix for artificial swamp as dephosphorization substrate material, that each filler in compounded mix is filled from feed-water end to water side successively according to water (flow) direction in syllogic dephosphorization system, by fixing filling proportion, tile respectively and be filled in syllogic dephosphorization system, first paragraph dephosphorization system in described syllogic dephosphorization system starts to fill respectively zeolite from top to bottom from feed-water end, hard coal, slag and biological ceramic particle, the zeolite of filling: hard coal: slag: the volume ratio of biological ceramic particle is 1:1 ~ 2:1:1, from the feed-water end of the second segment dephosphorization system of described syllogic dephosphorization system, filled biomass haydite, forsterite and hard coal respectively from the bottom to top, the biological ceramic particle of filling: forsterite: anthracitic volume ratio is 1 ~ 2:1:1, from the feed-water end of the 3rd section of dephosphorization system of described syllogic dephosphorization system, fill respectively zeolite and biological ceramic particle from top to bottom, the zeolite of filling: the volume ratio of biological ceramic particle is 3 ~ 4:1.
5. according to the application described in claim 1,2,3 or 4, it is characterized in that: the particle diameter of described forsterite is 2 ~ 3mm, is rich in MgO, the mass percentage content of Mg element is 26.02 ~ 27.31%.
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| CN201210384855.XA CN103723831B (en) | 2012-10-11 | 2012-10-11 | Application as the forsterite of dephosphorization host material |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771586A (en) * | 2012-10-22 | 2014-05-07 | 中国科学院生态环境研究中心 | Constructed wetland system for removing pathogenic microorganism in water |
| CN106554060A (en) * | 2015-09-28 | 2017-04-05 | 中国环境科学研究院 | A kind of nitrogen-phosphorus wastewater processes method and medicament with resource reclaim |
| CN106587363A (en) * | 2017-01-06 | 2017-04-26 | 青海爱迪旺环保科技有限公司 | Immobilized functional filler of artificial wetland |
| CN111644148A (en) * | 2020-06-10 | 2020-09-11 | 北京理工大学 | Preparation method of ultra-efficient sewage dephosphorization adsorbent |
Citations (2)
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| JPH10113693A (en) * | 1996-10-14 | 1998-05-06 | Maeda Okugai Bijutsu Kk | Method for cleaning water by water culture and its water cleaner |
| CN101638288A (en) * | 2009-08-27 | 2010-02-03 | 同济大学 | Filtration-fabric anti-clogging strengthening compound flow constructed wetland domestic sewage treatment system |
-
2012
- 2012-10-11 CN CN201210384855.XA patent/CN103723831B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10113693A (en) * | 1996-10-14 | 1998-05-06 | Maeda Okugai Bijutsu Kk | Method for cleaning water by water culture and its water cleaner |
| CN101638288A (en) * | 2009-08-27 | 2010-02-03 | 同济大学 | Filtration-fabric anti-clogging strengthening compound flow constructed wetland domestic sewage treatment system |
Non-Patent Citations (2)
| Title |
|---|
| ALEKSANDRA DRIZO 等: "Phosphorus removal by electric arc furnace steel slag and serpentinite", 《WATER RESEARCH》 * |
| 武俊梅 等: "垂直流人工湿地系统基质优化级配研究", 《环境科学》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103771586A (en) * | 2012-10-22 | 2014-05-07 | 中国科学院生态环境研究中心 | Constructed wetland system for removing pathogenic microorganism in water |
| CN106554060A (en) * | 2015-09-28 | 2017-04-05 | 中国环境科学研究院 | A kind of nitrogen-phosphorus wastewater processes method and medicament with resource reclaim |
| CN106587363A (en) * | 2017-01-06 | 2017-04-26 | 青海爱迪旺环保科技有限公司 | Immobilized functional filler of artificial wetland |
| CN111644148A (en) * | 2020-06-10 | 2020-09-11 | 北京理工大学 | Preparation method of ultra-efficient sewage dephosphorization adsorbent |
| CN111644148B (en) * | 2020-06-10 | 2021-11-26 | 北京理工大学 | Preparation method of ultra-efficient sewage dephosphorization adsorbent |
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| CN103723831B (en) | 2016-06-22 |
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