CN105540808B - A kind of method of medium eutrophic water body dephosphorization control algae - Google Patents
A kind of method of medium eutrophic water body dephosphorization control algae Download PDFInfo
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- CN105540808B CN105540808B CN201610032462.0A CN201610032462A CN105540808B CN 105540808 B CN105540808 B CN 105540808B CN 201610032462 A CN201610032462 A CN 201610032462A CN 105540808 B CN105540808 B CN 105540808B
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- enclosure
- water body
- bed mud
- phosphorus
- water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/286—Treatment of water, waste water, or sewage by sorption using natural organic sorbents or derivatives thereof
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5263—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using natural chemical compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F5/00—Dredgers or soil-shifting machines for special purposes
- E02F5/28—Dredgers or soil-shifting machines for special purposes for cleaning watercourses or other ways
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/105—Phosphorus compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
Abstract
The invention discloses a kind of method of medium eutrophic water body dephosphorization control algae, it includes that enclosure, water body dosing and stirring, bed mud dredging and bed mud consolidate phosphorus.The present invention handles the dephosphorization that diatomite and stalk are applied to eutrophication water, pass through the phosphorus in removal water body, the N/P ratio destroyed in water body is to gradually reduce the concentration of phosphorus in lake and reservoir, in addition dredging removes the enrichment of phosphorus in bed mud, mitigate release of the phosphorus to water body in bed mud, to build the limitation habitat of phosphorus, inhibits the algal grown in water body, reduce the frequency and intensity of algal bloom.Compared with prior art, the present invention cuts down phosphorus, simple process, economical and effective, high treating effect step by step using multi-stage absorption precipitating and dredging.The present invention is especially suitable for the dephosphorization control algaes in the local waters of the middle-size and small-size or large-scale eutrophication water of medium eutrophication, build phosphorus and limit habitat conditions, can significantly improve water quality.
Description
Technical field
The invention belongs to protection of natural resources and environment technical fields, and in particular to a kind of side of medium eutrophic water body dephosphorization control algae
Method.
Background technique
With economic rapid development, a large amount of industrial wastewaters and sanitary sewage are discharged into the surface water bodies such as river and lake, this
A large amount of nutritive salt are carried in a little waste water.Since being discharged into for the elements such as nitrogen, phosphorus causes algae in addition water body lacks necessary circulation
And other planktonic organisms breed rapidly, the decline of Dissolved Oxygen in Water amount, water quality deterioration, fish and other biological mortality cause
Water eutrophication.Treatment process in situ for controlling algal grown have by reduce the illumination water surface, launch filter-feeding fish,
The various ways such as planting aquatic plants.The problems such as effectively control and higher effective disposal costs are difficult to due to effect, it is difficult to effectively
It promotes.According to studies have shown that phosphorus concentration and chlorophyll response are significant in eutrophication water, phosphorus is the restricted control of cyanobacterial bloom
How the factor processed enables phosphorus in water body effectively to control, and builds phosphorus and limits habitat, to mitigate the eutrophication journey of water body
Degree, reduces the further breeding of algae.Therefore, the content of phosphorus in water body is effectively controlled using comprehensive control phosphorus technology in water body,
It builds phosphorus and limits habitat conditions, be further reduced the breeding of algae, the guidance ecosystem develops to careless type ecosystem direction, structure
The aquatic ecosystem for building benign cycle reaches fundamentally improvement water quality purpose.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of at low cost, high-efficient, easy-operating medium eutrophic water bodies
The method of dephosphorization control algae, it is existing in the prior art uncontrollable to a wide range of medium eutrophication water to solve the problems, such as.
In order to solve the above technical problems, The technical solution adopted by the invention is as follows:
A kind of method of medium eutrophic water body dephosphorization control algae, it includes the following steps:
(1) enclosure: being inserted into water bottom hard layer around waters to be repaired with spud pile, at the top of spud pile in
Portion forms Fence structure with cable wire lateral connection；Enclosure cloth is fixed on to the inside of Fence structure by cable wire, keeps enclosure cloth complete
Waters to be repaired is surrounded entirely, keeps water body and the outer water body of enclosure in enclosure completely isolated in entire repair process；
(2) water body dosing and stirring: diatomite is added into enclosure waters using boat-carrying balling iron, and is made by blender
Diatomite and water mixing；After the diatomite of investment forms cotton-shaped particle and precipitates, stalk is added into enclosure waters；
(3) bed mud dredging: after adding stalk, when phosphorus content is greater than 500mg/kg in bed mud in enclosure waters, using ring
It protects cutter suction dredger and bed mud dredging is carried out to the bed mud in enclosure waters, dredging is with a thickness of 30~60cm；
(4) bed mud consolidates phosphorus: after bed mud dredging, the silt that iron oxide, calcium carbonate and other pollution-free waters bottoms obtain being mixed
Mixing bed mud is obtained after even, mixing bed mud is spread in the bed mud after dredging, with a thickness of 5~12cm.
Wherein, the medium eutrophic water body refers to that eutrophication index is 60~70 water body.
In step (1), the depth in the spud pile insertion hard layer is greater than 1m, is higher by rehydration to be repaired at the top of spud pile
The height of the domain water surface is greater than 0.5m.
In step (1), the enclosure cloth is cloth that is waterproof and having water resistance, preferably canvas.
In step (1), enclosure cloth bottom end connects with water bottom, and enclosure cloth blocks water height higher than the waters water surface to be repaired
Greater than 0.5m.
In step (2), in every cubic metre of enclosure water body, the dosage of diatomite is 70~100g；The stirring speed of blender
Degree is 400~600r/min, and mixing time is 15~30min；The sedimentation time of diatomite is 40~60min.
In step (2), the size of stalk is 2~5cm；In every cubic metre of enclosure water body, the dosage of stalk is 30~
60g。
In step (4), iron oxide and calcium carbonate mass ratio are 1~4:1, and the quality sum of iron oxide and calcium carbonate is mixing
The 1~8% of bed mud gross mass.
Wherein, it when total phosphorus in water content is greater than 0.05mg/L or the bed mud content of organic matter is greater than 4.8mg/kg, puts in a suitable place to breed
Hydriopsis cumingii, breeding density are 1500~3000g/m3。
Wherein, if completing the enclosure to waters to be repaired, after having implemented the operation in wheel step (2)~(4), 60~90
If after it water quality in waters to be repaired still not up to needed for horizontal, the repeatedly operation in implementation steps (2)~(4), until complete
The reparation of pairs of water body.It completes after repairing, available pump exhausts the water in enclosure.
The present invention handles the dephosphorization that diatomite and wheat stalk are applied to eutrophication water, by removal water body
Phosphorus, the N/P ratio destroyed in water body is to gradually reduce the concentration of phosphorus in lake and reservoir, and dredging removes the enrichment of phosphorus in bed mud in addition, subtracts
Release of the phosphorus to water body in light bed mud inhibits the algal grown in water body to build the limitation habitat of phosphorus, reduces algal bloom
The frequency and intensity.
Dredging process of the present invention can remove together the diatomite for having adsorbed phosphorus in water body and having precipitated together with bottom phosphorus-rich sludge
It goes, along with embedment is mixed with the mixing silt of iron oxide, calcium carbonate, each step is combined, whole dephosphorization is improved
Effect.
The utility model has the advantages that compared with prior art, the present invention has the advantage that
1, using multi-stage absorption precipitating and dredging, phosphorus is cut down step by step, simple process, economical and effective, treatment effect
It is good.
2, whole system tandem compound, functional localization is clear, has obvious clearly stereovision, gives full play to respective function
Energy.
3, local water of this technology especially suitable for the middle-size and small-size or large-scale eutrophication water of medium eutrophication
The dephosphorization control algae in domain builds phosphorus and limits habitat conditions, can significantly improve water quality.
Detailed description of the invention
Fig. 1 is the method for the present invention implementation flow chart.
Specific embodiment
Embodiment 1
The seamless national standard steel pipe of zinc is crossed using several diameter 80mm or so, 3~5mm of thickness, as spud pile, along to be repaired
Rehydration domain edge is every in 2~65 meters of insertion lakebed hard layers；Spud pile is at least inserted into hard layer 1 meter, height at the top of spud pile
The height of the waters water surface to be repaired is greater than 0.5m out.By retaining ring shape will be connected with cable wire between the top of spud pile and middle part transverse direction
At Fence structure.Waterproof and water resistance is selected to fix enclosure cloth as enclosure cloth, and by cable wire for 5 years or more canvas
In the inside of Fence structure, enclosure cloth is made to surround waters to be repaired completely.Connection between enclosure cloth can use stainless steel substrates
It is engaged suture.Enclosure cloth blocks water height more than 0.5 meter of the water surface or more, and enclosure cloth bottom end connects with water bottom, makes in enclosure
Water body and the outer water body of enclosure are completely isolated in entire repair process.
Water body phosphorus concentration in enclosure is 0.51mg/L, turbidity 120NTU, eutrophication index 64.It is thrown using boat-carrying
Medicine device adds diatomite into enclosure waters, and mixes diatomite quickly with water body by blender.The dosage of diatomite
For 80mg/L, the mixing speed of blender is 500r/min, mixing time 20min.The diatomite of investment forms cotton-shaped particle
And it is precipitated into bed mud, sedimentation time 30min.
After diatomite precipitating, wheat stalk is added into enclosure waters.Wheat stalk is having a size of 2-5cm, dosage
50g/m3。
After adding stalk, when phosphorus content is greater than 500mg/kg in bed mud in enclosure waters, suction is twisted using environmental protection and is dredged
Ship carries out bed mud dredging to the bed mud in enclosure waters, and dredging is with a thickness of 50cm.
After bed mud dredging, mixed after the silt that iron oxide, calcium carbonate and other pollution-free waters bottoms obtain is mixed
Bed mud spreads mixing bed mud in the bed mud after dredging, with a thickness of 6cm.Wherein, iron oxide and calcium carbonate mass ratio are 1.5:
1, the quality sum of iron oxide and calcium carbonate is mix bed mud gross mass 5%.
The present invention handles the dephosphorization that diatomite and wheat stalk are applied to eutrophication water, by removal water body
Phosphorus, the N/P ratio destroyed in water body is to gradually reduce the concentration of phosphorus in lake and reservoir, and dredging removes the enrichment of phosphorus in bed mud in addition, subtracts
Release of the phosphorus to water body in light bed mud inhibits the algal grown in water body to build the limitation habitat of phosphorus, reduces algal bloom
The frequency and intensity.
Dredging process of the present invention can remove together the diatomite for having adsorbed phosphorus in water body and having precipitated together with bottom phosphorus-rich sludge
It goes, along with embedment is mixed with the mixing silt of iron oxide, calcium carbonate, each step is combined, whole dephosphorization is improved
Effect.
During the operation of enclosure water ecosystem, periodic monitoring water body concentration of nitrogen and phosphorus and planktonic organism changing condition are right
The maintenance work of enclosure water body stereo ecological system, which recycles, to be carried out, until it enters the self―sustaining stage.Apart from above-mentioned enclosure
The website of test block distance about 300m is as control point.Water quality prison is carried out to enclosure and control point behind 30 days and 60 days respectively
Survey, chlorophyll-a (Chl-a) measurement: filter membrane is placed in cold in refrigerator by acquisition water sample first through 0.45um acetate fiber membrane filtration
Freeze and save, after acetone extraction, using spectrophotometer (S22PC type), using 90% acetone as blank reference, measurement pigment is extracted
The specific monitoring data of the absorbance of liquid are shown in Table 1.The control of water body total phosphorus concentration is in 0.05mg/L hereinafter, algae after the technical program is implemented
Density domination is 104Within a/L, water body is in light green color.Phytoplankton biomass is respectively by 106A/L is reduced to 104A/L, subtracts
Lack 98%.Chlorophyll a administers front and back concentration and reduces 82%, and significant changes also have occurred in the sociales of phytoplankton.Before improvement,
Cyanobacteria and hidden algae have comparative advantage, and the plane fracture algae of Cyanophyta is absolute predominance kind, and after improvement, summer green alga and cyanobacteria are dominant,
But dominance is little, after phytoplankton association type is changed into improvement by medium eutrophy cyanobacteria (plane fracture algae) type before administering
In low eutrophy mixed type.
Monitoring index variation before and after 1 enclosure ecosystem of table
| Monitoring index | Index before experiment | Index after experiment 30 days | Index after experiment 60 days | Control point index |
| TP(mg/L) | 0.51 | 0.09 | 0.045 | 0.45 |
| Turbidity (NTU) | 120 | 20 | 4 | 115 |
| Algae density (a/L) | 2.23×106 | 1.2×105 | 3.01×104 | 2.5×106 |
| Chlorophyll a (mg/L) | 0.028 | 0.015 | 0.005 | 0.032 |
Claims (8)
1. a kind of method of medium eutrophic water body dephosphorization control algae, the medium eutrophic water body refer to that eutrophication index is
60~70 water body, which is characterized in that it includes the following steps:
(1) it enclosure: in spud pile insertion water bottom hard layer around waters to be repaired, is used at the top of spud pile with middle part
Cable wire lateral connection forms Fence structure；Enclosure cloth is fixed on to the inside of Fence structure by cable wire, wraps enclosure cloth completely
Waters to be repaired is enclosed, keeps water body and the outer water body of enclosure in enclosure completely isolated；
(2) water body dosing and stirring: diatomite is added into enclosure waters using boat-carrying balling iron, and diatom is made by blender
Soil and water mixing；After the diatomite of investment forms cotton-shaped particle and precipitates, stalk is added into enclosure waters；
(3) it bed mud dredging: after adding stalk, when phosphorus content is greater than 500mg/kg in bed mud in enclosure waters, is twisted using environmental protection
Suction Dredger carries out bed mud dredging to the bed mud in enclosure waters, and dredging is with a thickness of 30~60cm；
(4) bed mud consolidates phosphorus: after bed mud dredging, after the silt that iron oxide, calcium carbonate and other pollution-free waters bottoms obtain is mixed
Mixing bed mud is obtained, mixing bed mud is spread in the bed mud after dredging, with a thickness of 5~12cm.
2. the method for dephosphorization control algae according to claim 1, which is characterized in that in step (1), the spud pile insertion
Depth in hard layer is greater than 1m, and the height that the waters water surface to be repaired is higher by the top of spud pile is greater than 0.5m.
3. the method for dephosphorization control algae according to claim 1, which is characterized in that in step (1), the enclosure cloth is not
Cloth that is permeable and having water resistance.
4. the method for dephosphorization control algae according to claim 1, which is characterized in that in step (1), enclosure cloth bottom end and water body
Bottom connection, the water height of blocking that enclosure cloth is higher than the waters water surface to be repaired are greater than 0.5m.
5. the method for dephosphorization control algae according to claim 1, which is characterized in that in step (2), every cubic metre of enclosure waters
In, the dosage of diatomite is 70~100g；The mixing speed of blender be 400~600r/min, mixing time be 15~
30min；The sedimentation time of diatomite is 40~60min.
6. the method for dephosphorization control algae according to claim 1, which is characterized in that in step (2), the size of stalk is 2~
5cm；In every cubic metre of enclosure waters, the dosage of stalk is 30~60g.
7. the method for dephosphorization control algae according to claim 1, which is characterized in that in step (4), iron oxide and carbonic acid are calcareous
Ratio is measured as 1~4:1, the quality sum of iron oxide and calcium carbonate is mix bed mud gross mass 1~8%.
8. the method for dephosphorization control algae according to claim 1, which is characterized in that when total phosphorus in water content is greater than
When 0.05mg/L or the bed mud content of organic matter are greater than 4.8mg/kg, hydriopsis cumingii is put in a suitable place to breed, breeding density is 1500~3000g/m3 。
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108409047B (en) * | 2018-04-16 | 2020-05-05 | 中国科学院南京地理与湖泊研究所 | Method for systematically controlling rapid proliferation of blue algae cells in lake spring |
| CN109304146A (en) * | 2018-11-22 | 2019-02-05 | 南京大学 | A kind of magnetic adsorbent is inhibiting the purposes in algal grown |
| CN115417564A (en) * | 2022-10-09 | 2022-12-02 | 安徽久吾天虹环保科技有限公司 | Water bloom polluted water body remediation method |
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| GB2337749A (en) * | 1998-05-28 | 1999-12-01 | Gang Pan | A method for simultaneously clearing up harmful algal blooms and harnessing organic pollutants to promote the primary productivity in the sea |
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