CN101323497A - Deposit masking method of eutrophicated water restoration - Google Patents
Deposit masking method of eutrophicated water restoration Download PDFInfo
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- CN101323497A CN101323497A CNA2008100584093A CN200810058409A CN101323497A CN 101323497 A CN101323497 A CN 101323497A CN A2008100584093 A CNA2008100584093 A CN A2008100584093A CN 200810058409 A CN200810058409 A CN 200810058409A CN 101323497 A CN101323497 A CN 101323497A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000000873 masking effect Effects 0.000 title 1
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- 239000000203 mixture Substances 0.000 claims abstract description 22
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 1
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- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
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- RBTARNINKXHZNM-UHFFFAOYSA-K iron trichloride Chemical compound Cl[Fe](Cl)Cl RBTARNINKXHZNM-UHFFFAOYSA-K 0.000 description 1
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- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
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Abstract
The invention relates to a method for repairing eutrophication water by adopting natural geologic materials to cover the bottom mud, and the method is provided with functions of bottom-mud nutrient salt controlled release and algal blooming restriction. The method has the following steps: the natural red clay is milled to about 80 mess and a proper amount of fly ash and lime are added to be mixed with water, and the mixture is constantly stirred and then equably scattered into surface water at the end of the rest period of algal, and the quantity scattered is 4.5 to 6.0kg/m<2>. The invention combines the nutritive salt passivation technology in situ and the algal solidifying technology into a whole with an excellent effect and the manufacturing cost is low and the operation is convenient. The invention can be widely applied to the solving and prevention of the nourishing problems of lakes, parks and pools, etc. various waters. The invention provides a novel way of utilizing the fly ash of power plants as a source.
Description
Technical field
The present invention relates to a kind of employing sediment covered method of material (red clay), solid waste (fly ash in electric power plant) and lime reparation eutrophication water natively, have both the function that substrate sludge nutritive salt controlled release and algal bloom suppress.
Background technology
The original position sealing of endogenous pollution control techniques, the especially bed mud of eutrophication water and soverlay technique more and more become engineering practice and praise highly and use.Original position sealing and soverlay technique are to place one or more layers coverture on polluted bed mud, and polluted bed mud and water body are isolated, and fixedly the nutritive salt in water body and the bed mud stops substrate sludge nutritive salt and pollutent to discharge to the water body migration.Soverlay technique the earliest is to carry out in the U.S. in 1978, and Japan (1983), Norway (1992) and Canada countries such as (1995) also use this technology in succession subsequently.And up to now, adopt original position sealing and soverlay technique to control sediment pollution at home and also only rest on the experimental exploring stage.For any environmental pollutant, people can both invent corresponding effectively improvement method, and the selecting for use of covering material that wherein suit cheaply is the most key.Coverture commonly used mainly contains untainted bed mud, sandy soil, gravel or man-made land sill etc., and the reagent that the bed mud sealing is adopted comprises aluminium salt, molysite and lime etc., and clay mineral, zeolite, diatomite etc. also are used.Southern china red clay standing stock are abundant, widely distributed, because it has higher clay content, be rich in clay mineral and ferrimanganic aluminum oxide, nitrogen, phosphorus, organism and soluble salt content are very low, thereby can be used as the material natively that good water body is removed nitrogen, phosphorus.And, thereby be suitable for basin pollution or the purification of eutrophication water and the large-scale engineering applications of reparation because it is with low cost.
Summary of the invention
The purpose of this invention is to provide the sediment covered method that a kind of eutrophication water is repaired, this method with simply dealt neutral red clay as main raw, and add an amount of flyash, lime, directly apply water body in lake after the mixing, an economy, reasonable, effective body eutrophication control and the method for administering are provided, can acquire a certain degree and upward effect a radical cure the purpose of body eutrophication and algal tufa outburst.
The present invention is a kind of employing sediment covered method of material reparation eutrophic water body natively, have both the function that substrate sludge nutritive salt controlled release and algal bloom suppress, it is that the neutral red clay is levigate to 80 orders, and add an amount of flyash and lime, three's weight proportion is 3～12: 1～2: 1, be preferably 12: 2: 1, after mixing with water and continue stirring, mixture (algae bio dormancy end of term) at the beginning of last month of spring in winter is evenly shed in the surface water body, and injected volume is 4.5～6.0kg/m
2(cover bed thickness 4～5mm), can effectively control and repair the body eutrophication process.
Its technical process and process control condition are as follows:
One, the technology of getting the raw materials ready
(1) neutral red clay preparation: preferably not influenced by farming or the local red clay of artificial disturbance, preparation according to a conventional method, it is levigate that to be screened to 80 orders following standby;
(2) auxiliary material preparation: select fly ash in electric power plant and lime powder for use, auxiliary material is standby as adding;
(3) mix to be equipped with: is neutral red clay, flyash and lime by weight ratio 3～12: 1～2: 1 by certain set of dispense than (neutral red clay part by weight is greater than 75%) with above-mentioned materials, be preferably 12: 2: 1, mix, promptly make the covering mixture;
Two, shed input
Determine that suitable total input (is generally 4.5～6.0kg/m
2) after, cover mixture before shedding input, with the water uniform mixing.Shed when throwing in, should guarantee evenly as far as possible.For avoiding water body to reflux to the stable tectal disturbance in back, available ovum, gravel are provided with the subregion fence in water bottom, promote water body backflow interface, construct the hydrodynamic environment of a relatively placidity in water body lower floor.The isolation rail range size is decided on the hydrodynamic condition and the water body depth.
Three, follow-up maintenance
In actual applications, can there be the surface local non-uniform phenomenon in the bed mud tectum because of construction.For keeping treatment effect, according to above-mentioned technical process, can in then, add throwing once, also can after 1 year, go again and broadcast sowing once, total input is looked situation and is reduced.
This method with simply dealt neutral red clay as main raw, and add an amount of flyash, lime, directly apply water body in lake after the mixing, on the one hand in the mixture precipitation process, can remove nutritive salt and algae bios such as nitrogen in the water body, phosphorus in a large number, can form a tectum on deposition bed mud surface on the other hand, lower floor's substrate sludge nutritive salt and frustule barrier are enclosed in it down, prolong its residence time, be beneficial to and solidify absorption, prevent nitrogen, phosphorus etc. and pollutent resuspending or migration release in the bed mud; Simultaneously, polluted bed mud and bottom-dwelling (algae etc.) physical property ground separate, the passage of nutritive salt release such as nitrogen, phosphorus and algae bio and hatching cell (embryo) come-up growth and breeding thereof in the blocking-up settling bed mud, algae is in bud extremely.Thereby play the effect that substrate sludge nutritive salt controlled release and algal tufa suppress, tectum also has microvoid structure, can keep its micro-permeability.The covering mixture of making by above-mentioned technical process and control condition, and macking technique provide an economy, rationally, effectively body eutrophication control and the method for administering, can realize effecting a radical cure the purpose of body eutrophication and algal tufa outburst to a certain extent.The present invention combines the in-situ passivation technology of nutritive salt with the technique for fixing of algae bio, result of use is good, and with low cost, and is easy to operate, can be widely used in the improvement and the prevention of all kinds of body eutrophication problems such as lake, park, pond.The present invention also provides the new way of fly ash in electric power plant recycling.
Description of drawings
Fig. 1 is a process flow diagram of the present invention.
Embodiment
Among Fig. 1, technical process shown in the reference below with 3 embodiment, is selected three groups of different process control parameters in allowed band, implement to specify.
One, the technology of getting the raw materials ready
(1) neutral red clay preparation: preferably not influenced by farming or the local red clay of artificial disturbance, preparation according to a conventional method, it is levigate that to be screened to 80 orders following standby;
(2) auxiliary material preparation: select fly ash in electric power plant and lime powder for use, auxiliary material is standby as adding;
(3) mix outfit: press certain set of dispense than (neutral red clay part by weight is greater than 75%) with above-mentioned materials, mix, promptly make the covering mixture;
Two, shed input
Determine that suitable total input (is generally 4.5～6.0kg/m
2) after, cover mixture before shedding input, with the water uniform mixing.Shed when throwing in, should guarantee evenly as far as possible.For avoiding water body to reflux to the stable tectal disturbance in back, available ovum, gravel are provided with the subregion fence in water bottom, promote water body backflow interface, construct the hydrodynamic environment of a relatively placidity in water body lower floor.The isolation rail range size is decided on the hydrodynamic condition and the water body depth.
Three, follow-up maintenance
In actual applications, can there be the surface local non-uniform phenomenon in the bed mud tectum because of construction.For keeping treatment effect, according to above-mentioned technical process, can in then, add throwing once, also can after 1 year, go again and broadcast sowing once, total input is looked situation and is reduced.
Test position: the field repair place is positioned at Dou Nan town, Chenggong County, Kunming plum village Xi1kmChu, near (24 ° of 53 ' N, 102 ° 46 ' E) in the adjacent lake water pool of Dian Chi, Yunnan east bank.
Testing apparatus:, vertically be fixed on and form the examination bucket in the pond with the cylindrical pvc pipe of high 1.80m, diameter 0.30cm.Bung opens wide, and bed mud 0.15m is inserted in the bottom, and the top exceeds water surface 0.15m, and all the examination bucket is fixed on the round log support of building.In examination bucket, add the laterite of different ingredients then, and have one parallel.And reserve 2 examination buckets as blank, the outer pond water of bucket does not all add any reagent in contrast yet.
Test materials: the neutral red clay all picks up from Reservoir region east side, Song Hua dam, Kunming, Yunnan Province, and (downward cutting is to the 5m depths from the face of land during sampling for 25 ° of 08 ' N, 102 ° of 46 ' E) waste mountain area, and pulverizing is mixing afterwards; Flyash is for taking from the one-level ash in Kunming power plant (elder brother's electricity industry main office) the dry ash storehouse, and promptly 300 orders (45 μ m) residual content is less than 12%; Lime powder is the lime powder of market sale.Behind the sample all air-dry (water content is 3.5%), cross 20 orders, 80 mesh sieves are crossed in fine grinding again, and through 200 ℃ of oven dry 3h, place moisture eliminator standby.
Sampling analysis: the reagent time of adding is counted the 0th day.Sampling observation time afterwards is: throw spread before the experiment and after 1 day each sampling and measuring 1 time, measure weekly January 1 time afterwards, per two weeks in February are measured 1 time, measure 1 time around the 3rd～May is every, per eight weeks are measured 1 time after June, until a complete hydrological year, off-test, totally 14 sub-samplings test.Duration of test, water sampling is measured in each examination bucket and total phosphorus (TP), total nitrogen (TN), titanium pigment (DP), the ammonia-state nitrogen (NH of the outer pond water of examination bucket on time
4 +-N), nitrate nitrogen (NO
3 -N) and plant plankton biomass (in chlorophyll a content, i.e. Chl-a), testing method is national standard method or international method.Simultaneously, field observation record temperature, water temperature, color, SD (transparency), pH value and biomass present situation etc. are to investigate the macro-effect that bed mud covers.
Embodiment 1
One, the preparation technology that gets the raw materials ready
With neutral red clay, flyash and lime is 3: 1: 1 mixings by weight ratio, after mixing with water and continuing to mix thoroughly, makes the covering mixture, can on-the-spotly throw in.
Two, shed input
To evenly shed in the examination bucket water body with the mixed mixture of water, injected volume is 3.80kg/m
2, cover thickness is 3mm).
Three, effect analysis
During the observation after adding reagent, TP, TN concentration all are remarkable reduction trend in each examination bucket, during off-test in each examination bucket TP, TN concentration reached lower level, compare with contrast examination bucket and pond waters, the TP clearance is respectively 79.0%, 74.0%, DP content (0.005mg/L) has been significantly less than the low limit value of algal tufa outburst, and the TN clearance is respectively 54.7% and 68.4%, NH
4 +-N and NO
3 --N content (0.179mg/L, 0.038mg/L) all has been starkly lower than the low limit value of algal tufa outburst.Compare with contrast examination bucket and pond waters, test later stage examination inner bucket water body Chl-a content has all been reduced to (＜2.5mg/m in the rich or poor nutrient laden numerical range
3), clearance is respectively 92.8% and 84.3%, and Chl-a still keeps higher level in contrast examination bucket and the pond water, and have twice significantly rising (algal tufa outburst).For blank examination bucket and pond waters, SD is respectively 20cm～30cm and 10cm～20cm, and examination inner bucket water body all shows higher transparency, and SD is all above 125cm.Obvious, this insulating covering agent has suppressed a large amount of breedings of plant plankton such as algae in the water body effectively.
Embodiment 2
One, the preparation technology that gets the raw materials ready
With neutral red clay, flyash and lime is 6: 1: 1 mixings by weight ratio, after mixing with water and continuing to mix thoroughly, makes the covering mixture, can on-the-spotly throw in.
Two, shed input
To evenly shed in the examination bucket water body with the mixed mixture of water, injected volume is 3.65kg/m
2, cover thickness is 3mm).
Three, effect analysis
During the observation after adding reagent, TP, TN concentration all are remarkable reduction trend in each examination bucket, during off-test in each examination bucket TP, TN concentration reached lower level, compare with contrast examination bucket and pond waters, the TP clearance is respectively 72.5%, 80.4%, DP content (0.004mg/L) has been significantly less than the low limit value of algal tufa outburst, and the TN clearance is respectively 46.9% and 63.3%, NH
4 +-N and NO
3 --N content (0.241mg/L, 0.011mg/L) has been starkly lower than the low limit value of algal tufa outburst.Compare with contrast examination bucket and pond waters, test later stage examination inner bucket water body Chl-a content has all been reduced to (＜2.5mg/m in the rich or poor nutrient laden numerical range
3), clearance is respectively 96.7% and 92.1%, and Chl-a still keeps higher level in contrast examination bucket and the pond water, and have twice significantly rising (algal tufa outburst).For blank examination bucket and pond waters, SD is respectively 20cm～30cm and 10cm～20cm, and examination inner bucket water body all shows higher transparency, and SD is all above 120cm.Obvious, this insulating covering agent has suppressed a large amount of breedings of plant plankton such as algae in the water body effectively.
Embodiment 3
One, the preparation technology that gets the raw materials ready
With neutral red clay, flyash and lime is 12: 2: 1 mixings by weight ratio, after mixing with water and continuing to mix thoroughly, makes the covering mixture, can on-the-spotly throw in.
Two, shed input
To evenly shed in the examination bucket water body with the mixed mixture of water, injected volume is 6.0kg/m
2, cover thickness is 5mm).
Three, effect analysis
During the observation after adding reagent, TP, TN concentration all are remarkable reduction trend in each examination bucket, during off-test in each examination bucket TP, TN concentration reached lower level, compare with contrast examination bucket and pond waters, the TP clearance is respectively 82.6%, 88.6%, DP content (0.003mg/L) has been significantly less than the low limit value of algal tufa outburst, and the TN clearance is respectively 56.4% and 69.1%, NH
4 +-N and NO
3 --N content (0.141mg/L, 0.009mg/L) has been starkly lower than the low limit value of algal tufa outburst.Compare with contrast examination bucket and pond waters, test later stage examination inner bucket water body Chl-a content has all been reduced to (＜2.5mg/m in the rich or poor nutrient laden numerical range
3), clearance is respectively 98.4% and 95.3%, and Chl-a still keeps higher level in contrast examination bucket and the pond water, and have twice significantly rising (algal tufa outburst).For blank examination bucket and pond waters, SD is respectively 20cm～30cm and 10cm～20cm, and examination inner bucket water body all shows higher transparency, and SD is all above 140cm.Obvious, this insulating covering agent has suppressed a large amount of breedings of plant plankton such as algae in the water body effectively.
Treatment effect achievement analytical results table among table 1 embodiment 1,2 and 3
The chemical ingredients compositional analysis of table 2 test usefulness material is table as a result
Analytical procedure: ICP-MS; Measuring unit: northwest nonferrous metals geology score of the game is analysed test center.
In three kinds of prescriptions, embodiment 3 prescription repairing effect optimums.
Claims (2)
1, a kind of sediment covered method of eutrophication water reparation is characterized in that this method comprises:
(1) technology of getting the raw materials ready
Neutral red clay preparation: preferably not influenced by farming or the local red clay of artificial disturbance, preparation according to a conventional method, levigate being screened to below 80 orders;
The auxiliary material preparation: select fly ash in electric power plant and lime powder for use, auxiliary material is standby as adding;
Mix and be equipped with: with red clay, fly ash in electric power plant, three kinds of materials of lime is 3～12: 1～2 by weight ratio: 1 mixes, and promptly makes the covering mixture;
(2) shed input
By 4.5～6.0kg/m
2Total input, cover mixture before shedding input, with the water uniform mixing.Shed when throwing in, should guarantee evenly as far as possible.For avoiding water body to reflux to the stable tectal disturbance in back, available ovum, gravel are provided with the subregion fence in water bottom, promote water body backflow interface, construct the hydrodynamic environment of a relatively placidity in water body lower floor;
(3) follow-up maintenance
For keeping treatment effect, according to above-mentioned technical process, can in then, add throwing once, also can after 1 year, go again and broadcast sowing once, total input is looked situation and is reduced.
2, the sediment covered method of eutrophication water reparation as claimed in claim 1 is characterized in that in the technology of getting the raw materials ready of described method: mix to be equipped with mixing at 12: 2: 1 by preferred weight part proportioning with red clay, fly ash in electric power plant, three kinds of materials of lime.
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| Application Number | Priority Date | Filing Date | Title |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101870547A (en) * | 2010-05-11 | 2010-10-27 | 杭州师范大学 | Method for in-situ control of phosphorus release from eutrophic water bottom sediment |
| CN101643261B (en) * | 2009-08-24 | 2011-06-29 | 暨南大学 | Algae-controlling laterite compound flocculant as well as preparation method and applications thereof |
| CN102617089A (en) * | 2012-03-28 | 2012-08-01 | 河海大学 | Bentonite-cement in situ covering composite material and preparation method for same |
| CN102701552A (en) * | 2012-06-21 | 2012-10-03 | 南京大学 | Covering material for immobilized in-situ remediation of nitrogen in bottom sediment and preparation method thereof |
| CN103951463A (en) * | 2014-05-13 | 2014-07-30 | 贵州大学 | In-situ control coverage material for bottom mud of eutrophication-polluted lake, as well as preparation method thereof |
| CN105540808A (en) * | 2016-01-18 | 2016-05-04 | 北京绿景行科技发展有限公司 | Phosphorous removal and alga control method for medium eutrophication water body |
| CN106242195A (en) * | 2016-09-22 | 2016-12-21 | 浙江清华长三角研究院 | A kind of method utilizing Ecological Measures to improve water bodies of rivers and lakes transparency |
| CN112345413A (en) * | 2020-09-18 | 2021-02-09 | 武汉大学 | Method for testing global distribution of infiltration water and inorganic solute under micro-spray irrigation condition |
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2008
- 2008-05-19 CN CNA2008100584093A patent/CN101323497A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101643261B (en) * | 2009-08-24 | 2011-06-29 | 暨南大学 | Algae-controlling laterite compound flocculant as well as preparation method and applications thereof |
| CN101870547A (en) * | 2010-05-11 | 2010-10-27 | 杭州师范大学 | Method for in-situ control of phosphorus release from eutrophic water bottom sediment |
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