CN109354159B - In-situ remediation method suitable for micro-polluted water body - Google Patents
In-situ remediation method suitable for micro-polluted water body Download PDFInfo
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- CN109354159B CN109354159B CN201811443050.1A CN201811443050A CN109354159B CN 109354159 B CN109354159 B CN 109354159B CN 201811443050 A CN201811443050 A CN 201811443050A CN 109354159 B CN109354159 B CN 109354159B
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/109—Characterized by the shape
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
- C02F3/105—Characterized by the chemical composition
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
- C02F3/342—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the enzymes used
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/16—Total nitrogen (tkN-N)
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- C02F2209/18—PO4-P
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/06—Nutrients for stimulating the growth of microorganisms
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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Abstract
The invention aims to provide a method suitable for in-situ remediation of a micro-polluted water body, which comprises an ecological floating bed and a modified fiber band woven fabric positioned at the lower part of the ecological floating bed, wherein the ecological floating bed is fixed by nylon ropes through an underwater pile driving method, the modified fiber band woven fabric is fixed at the bottom of the ecological floating bed by the nylon ropes, the ecological floating bed comprises a filter material and aquatic plants, and the modified fiber band woven fabric is woven by modified fiber bands.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an in-situ remediation method suitable for micro-polluted water.
Background
The river channel is an important support for urban ecological environment, is an important natural resource and environment carrier, has close relationship with human production and living, and plays a significant role in urban planning and construction. At present, with the pace of urban construction being accelerated, a large amount of untreated domestic sewage and industrial wastewater are discharged into rivers, so that the ecological system of the rivers closely related to human life is gradually degraded, and the self-cleaning capability is weakened. On the other hand, in recent years, with the improvement of living standard and quality of living environment, the requirements of people on lakes, rivers and landscapes are continuously improved, and the water landscape is more important for improving the quality of the living environment.
At present, the existing water treatment technology only focuses on unilateral water quality improvement and neglects the landscape requirement, the landscape design scheme only focuses on landscape experience and neglects the water quality requirement, and the landscape design scheme and the landscape experience are split and operated, so that the ever-increasing comprehensive experience requirement of people is difficult to meet. Therefore, the method for purifying the water body, improving the self-purification capacity of the water body and giving consideration to good landscape experience is a great trend in the field of environment.
Disclosure of Invention
Based on the defects of the prior art, the invention aims to provide a method suitable for in-situ remediation of a micro-polluted water body, improve the current situation of water quality improvement and landscape construction and organically combine the water quality improvement and landscape construction to create a novel comprehensive remediation mode.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method suitable for in-situ remediation of micro-polluted water is characterized by comprising the following steps: comprises an ecological floating bed 1 and a modified fiber band woven fabric positioned at the lower part of the ecological floating bed; the ecological floating bed comprises a bed body, a filter material is paved in the bed body, and ecological plants are planted on the filter material;
the specific manufacturing steps of the modified fiber band woven fabric are as follows:
(1) soaking mature Abutilon plant in water for 1-2 months, taking out, sun drying, and peeling to obtain filamentous material; crushing and sieving natural dried reed stems to obtain powdery materials;
(2) respectively placing the filamentous materials and the powdery materials obtained in the step (1) into NaOH solutions with the mass fraction of 1% -5%, soaking for 6-8 h, performing solid-liquid separation, and drying to obtain activated filamentous materials and activated powdery materials;
(3) uniformly brushing carboxylic styrene-butadiene latex in the activated filamentous material obtained in the step (2), then flatly paving the material to a mold, and pressing the material into a fibrofelt with the thickness of 3-8 mm; then, cutting the fiber felt into strips to obtain fiber belts;
(4) mixing polymethyl methacrylate, the activated powdery material obtained in the step (2), starch and vinyl triethoxysilane by a weight ratio of 45-60: 30-45: 3-6: 1, mixing to obtain a modifier; dispersing a modifier in a mixed solution of ethanol and water to obtain a modified solution; the modifier is added into the mixed solution of ethanol and water in an amount of 50-60 g/L, and the mixed solution of ethanol and water is prepared by uniformly mixing ethanol and water according to a volume ratio of 1: 1.5-2.5;
(5) immersing the fiber belt obtained in the step (3) in the modification liquid obtained in the step (4), vibrating for 8-10 h, and taking out to obtain a modified fiber belt;
(6) uniformly coating a microbial liquid on the surface of the modified fiber band, and curing at room temperature for 20-30 h to obtain a reinforced modified fiber band;
(7) and (3) folding the reinforced modified fiber belts in pairs alternately back and forth until the weaving is finished to obtain the modified fiber belt woven fabric.
Preferably, the width of the fiber band is 4-6 cm.
Preferably, the microbial liquid contains a nitrifying bacteria population and a denitrifying bacteria population.
Preferably, the filter material is a combination of organic peat soil, perlite and cassava residue.
Preferably, the ecological floating bed ecological plant is one or a combination of several of evergreen iris, celandine, floral leaf giant reed and oriental cattail.
Preferably, the ecological floating bed is fixed by nylon ropes through a submarine piling method.
Preferably, the ecological floating bed body is made of environment-friendly polyethylene materials and is coated with waterproof anticorrosive paint.
Preferably, the modified fiber band woven fabric is fixed at the bottom of the ecological floating bed by nylon ropes.
The beneficial effects of the invention are:
(1) the modified fiber band-knitted fabric has wide raw material sources, high economy, larger specific surface area of a finished product and higher porosity, and can greatly shorten the maturation time of microorganism biofilm formation; the microbial liquid is coated, so that the number of microorganisms in the water body can be greatly increased, the decomposition and release process of nitrogen and phosphorus in the water body is promoted, and the water body restoration efficiency is improved;
(2) according to the invention, the ecological floating bed and the modified fiber band woven fabric are combined, so that the overall water quality is improved, and the landscape property of the water body is taken into consideration, and the ecological property and the landscape property are organically unified;
(3) the organic peat soil in the ecological floating bed matrix can provide rich organic matters, N, P, K and trace elements, guarantee is provided for the growth of plants, the removal rate of the plants to water TN and TP is higher, the capacity of improving dissolved oxygen is better, and the whole water quality can be effectively improved.
Drawings
FIG. 1 is a schematic structural diagram of the ecological floating bed and the modified fiber band woven fabric of the invention;
FIG. 2 is a schematic view of two modified fiber tapes being folded back and forth alternately;
fig. 3 is a plane layout view of the ecological floating bed when the effect test is carried out by the invention.
Detailed Description
In order to make the technical purpose, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention are further described with reference to specific examples, which are intended to explain the present invention and are not to be construed as limiting the present invention, and those who do not specify a specific technique or condition in the examples follow the techniques or conditions described in the literature in the art or follow the product specification.
The carboxylated styrene-butadiene latex in the following examples was obtained from Kagaku chemical Co., Ltd, model TG 786; the microbial agent is purchased from Guangzhou microbial source environment technology GmbH, model 001A, and has colony count of 5.9 × 1010cfu/g, effective viable count>2.0×109(ii)/g; the microbial liquid is prepared by uniformly mixing the microbial agent, ultrapure water and corn starch according to the mass ratio of 1:20: 0.5.
Example 1
As shown in fig. 1-2, a method suitable for in-situ remediation of a micro-polluted water body specifically comprises an ecological floating bed 1 and a modified fiber band woven fabric 2 positioned at the lower part of the ecological floating bed, wherein the ecological floating bed 1 comprises a bed body, a filter material 3 is laid in the bed body, and ecological plants 4 are planted on the filter material 3.
The ecological floating bed is characterized in that the specification of 1 ecological floating bed is set to be 3 m multiplied by 5m, the bed body is made of environment-friendly polyethylene materials, the outer surface of the bed body is coated with waterproof anticorrosive coatings, the bed body is fixed by nylon ropes 5 through an underwater pile driving method, filter materials 3 with the thickness of 5-10 cm are flatly paved in the ecological floating bed 1, the filter materials 3 are formed by uniformly mixing organic peat soil, perlite and cassava residues according to the mass ratio of 5:1:1, evergreen irises are planted on the filter materials 3 at intervals of 15-20 cm, 1 piece of modified fiber band woven fabric 2 with the length of 1m is hung at the bottom of the ecological floating bed 1 at intervals of 0.5m through the nylon ropes 5 of 15 cm, and the number of the modified fiber band woven fabric 2 is 30.
The specific manufacturing steps of the modified fiber band woven fabric 2 are as follows:
(1) soaking mature Abutilon plant in water for 1-2 months, taking out, sun drying, and peeling to obtain filamentous material; crushing and sieving natural dried reed stems to obtain powdery materials;
(2) respectively placing the filamentous material and the powdery material obtained in the step (1) into a NaOH solution with the mass fraction of 2%, soaking for 6 hours, and then carrying out solid-liquid separation and drying to obtain activated filamentous material and activated powdery material;
(3) uniformly brushing carboxylic styrene-butadiene latex in the activated filamentous material obtained in the step (2), then flatly paving the filamentous material to a mold, and pressing the filamentous material into a fibrofelt with the thickness of 3-8 mm by a Jiangsu Xinjiang-synergetic 150-ton universal test press; then, cutting the fiber felt into strips to obtain a fiber belt with the width of 5 cm;
(4) mixing polymethyl methacrylate, the activated powdery material obtained in the step (2), starch and vinyl triethoxysilane according to the weight ratio of 50: 35: 4: 1, mixing to obtain a modifier; dispersing a modifier in a mixed solution of ethanol and water to obtain a modified solution; the modifier is added into the mixed solution of ethanol and water in an amount of 55 g/L, and the mixed solution of ethanol and water is prepared by uniformly mixing ethanol and water according to the volume ratio of 1: 2;
(5) immersing the fiber belt obtained in the step (3) in the modification liquid obtained in the step (4), vibrating for 10 hours, and taking out to obtain a modified fiber belt;
(6) uniformly coating microbial liquid on the surface of the modified fiber band, wherein the dosage of the microbial liquid is 500 mL/m2Curing at room temperature for 24 hours after coating is finished to obtain a reinforced modified fiber belt;
(7) and (3) folding the reinforced modified fiber belts in pairs alternately back and forth until the weaving is finished to obtain the modified fiber belt woven fabric 2.
The specific process of alternately folding the two modified fiber belts back and forth is shown in fig. 2, firstly, two modified fiber belts are placed on the same plane, the two modified fiber belts are vertically arranged, the two fiber belts are respectively defined as a vertical belt 6 and a horizontal belt 7, one end of the vertical belt 6 is fixedly connected with one end of the horizontal belt 7, a plurality of folding lines 8 are uniformly arranged on the vertical belt 6 and the horizontal belt 7 at intervals, the modified fiber belts are equally divided into a plurality of square units by the folding lines 8, then the vertical belt 6 is turned over downwards along the folding lines 8, the horizontal belt 7 is turned over leftwards along the folding lines 8, the vertical belt 6 is turned over upwards along the folding lines 8, the horizontal belt 7 is turned over rightwards along the folding lines 8, so that the square units of the vertical belt 6 and the square units of the horizontal belt 7 are sequentially overlapped, the circular alternate back and forth folding is continued until the folding is completed, and the other ends of the vertical belt 6 and the horizontal belt 7 are fixed together, and finally, connecting the nylon rope 5.
The root system of the ecological plant 4 is generally longer, the contact surface area with the water body can be increased, a large amount of enzyme can be secreted, and the decomposition of pollutants is accelerated. On the other hand, the modified fiber band-knitted fabric 2 has a rough surface, more micropore structures, durability and degradability, can avoid secondary pollution, can guide the growth and reproduction of beneficial microorganisms orderly, is beneficial to water quality improvement, and has the advantages of low manufacturing cost, low energy consumption, low operation cost and the like.
Example 2
The method of example 1 is followed with the difference that part of the parameters in the manufacturing steps of the modified fiber tape woven fabric 2 are changed:
1) changing the concentration of the NaOH solution in the step (2) to 3%, and soaking for 8 h;
2) changing the modifier in the step (4) into a powdery material, starch and vinyl triethoxysilane according to a weight ratio of 45: 30: 5:1, mixing;
3) changing the dosage of the microbial liquid in the step (6) to 450mL/m2。
Example 3
The method of example 1 is followed with the difference that part of the parameters in the manufacturing steps of the modified fiber tape woven fabric 2 are changed:
4) changing the concentration of the NaOH solution in the step (2) to 5%, and soaking for 8 h;
5) changing the modifier in the step (4) into a powdery material, starch and vinyl triethoxysilane according to the weight ratio of 55: 40: 6:1, mixing;
6) changing the dosage of the microbial liquid in the step (6) to 400mL/m2。
Comparative example
An ecological floating bed with an ecological base, which is the same as the ecological floating bed 1 of example 1 except that the modified fiber tape woven fabric 2 was changed to a general commercially available ecological base (purchased from Hui color non-woven technologies, Inc. of Foshan city, model HCT-002).
Next, the ecological floating bed 1 and the modified fiber band woven fabric 2 obtained in examples 1 to 3 and the ecological floating bed with the ecological base obtained in comparative example 1 were installed in a park of Zheng Zhou city in a water area of about 10000 m2And 15 are evenly arranged at intervals along the circumferential direction, are about 10 meters off the shore, and are placed for 3 months for effect testing.
The water quality ratios of examples 1-3 were determined as follows:
the application result shows that: compared with the comparative example 1, the microorganism biofilm formation maturation time of the embodiments 1 to 3 is shortened by 35% to 55%, the water quality index is integrally increased from the inferior V type to the III type water body, the water transparency is increased from <0.5m to >1m, and the water body remediation efficiency is increased by more than 30%.
The present invention is not limited to the above-described embodiments, which are described in the specification and illustrated only for illustrating the principle of the present invention, but various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the present invention as claimed.
Claims (5)
1. A method suitable for in-situ remediation of micro-polluted water is characterized by comprising the following steps: comprises an ecological floating bed and a modified fiber band woven fabric positioned at the lower part of the ecological floating bed; the ecological floating bed comprises a bed body, a filter material is paved in the bed body, and ecological plants are planted on the filter material;
the specific manufacturing steps of the modified fiber band woven fabric are as follows:
(1) soaking mature Abutilon plant in water for 1-2 months, taking out, sun drying, and peeling to obtain filamentous material; crushing and sieving natural dried reed stems to obtain powdery materials;
(2) respectively placing the filamentous materials and the powdery materials obtained in the step (1) into NaOH solutions with the mass fraction of 1% -5%, soaking for 6-8 h, performing solid-liquid separation, and drying to obtain activated filamentous materials and activated powdery materials;
(3) uniformly brushing carboxylic styrene-butadiene latex in the activated filamentous material obtained in the step (2), then flatly paving the material to a mold, and pressing the material into a fibrofelt with the thickness of 3-8 mm; then, cutting the fiber felt into strips to obtain fiber belts;
(4) mixing polymethyl methacrylate, the activated powdery material obtained in the step (2), starch and vinyl triethoxysilane according to the weight ratio of 45-60: 30-45: 3-6: 1 to obtain a modifier; dispersing a modifier in a mixed solution of ethanol and water to obtain a modified solution; the modifier is added into the mixed solution of ethanol and water in an amount of 50-60 g/L, and the mixed solution of ethanol and water is prepared by uniformly mixing ethanol and water according to a volume ratio of 1: 1.5-2.5;
(5) immersing the fiber belt obtained in the step (3) in the modification liquid obtained in the step (4), shaking for 8-10 h, taking out, and airing to obtain a modified fiber belt;
(6) uniformly coating a microbial liquid on the surface of the modified fiber band, and curing at room temperature for 20-30 h to obtain a reinforced modified fiber band;
(7) the reinforced modified fiber belts are folded back and forth alternately in pairs until the weaving is finished to obtain a modified fiber belt woven fabric;
the microbial liquid contains nitrifying bacteria and denitrifying bacteria; the filter material is formed by mixing organic peat soil, perlite and cassava residue.
2. The method for in-situ remediation of micro-polluted water according to claim 1, wherein: the width of the fiber band is 4-6 cm.
3. The method for in-situ remediation of micro-polluted water according to claim 1, wherein: the ecological plant is one or a combination of several of evergreen iris, celandine, floral leaf giant reed and oriental cattail.
4. The method for in-situ remediation of micro-polluted water according to claim 1, wherein: the bed body is made of environment-friendly polyethylene materials, and is coated with waterproof anticorrosive paint.
5. The method for in-situ remediation of micro-polluted water according to claim 1, wherein: the modified fiber band woven fabric is fixed at the bottom of the ecological floating bed by nylon ropes.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999361A (en) * | 2007-01-05 | 2007-07-18 | 华南理工大学 | Nutrition slow-release type biofiller for water treatment and its preparation method |
| CN101514054A (en) * | 2009-03-30 | 2009-08-26 | 同济大学 | Combined ecological floating bed device |
| CN103864992A (en) * | 2014-02-27 | 2014-06-18 | 常州大学 | Method for preparing high water absorbent resin by using reeds |
| CN203728646U (en) * | 2013-12-19 | 2014-07-23 | 北京京阳环保工程有限公司 | Ecological floating island for water purification of landscape river |
| CN105603541A (en) * | 2015-12-17 | 2016-05-25 | 雷春生 | Abutilon fiber preparation method |
| CN108330686A (en) * | 2018-01-02 | 2018-07-27 | 江苏大学 | The preparation method of the chitin modified basalt fibre carrier of hydrophily |
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2018
- 2018-11-29 CN CN201811443050.1A patent/CN109354159B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100999361A (en) * | 2007-01-05 | 2007-07-18 | 华南理工大学 | Nutrition slow-release type biofiller for water treatment and its preparation method |
| CN101514054A (en) * | 2009-03-30 | 2009-08-26 | 同济大学 | Combined ecological floating bed device |
| CN203728646U (en) * | 2013-12-19 | 2014-07-23 | 北京京阳环保工程有限公司 | Ecological floating island for water purification of landscape river |
| CN103864992A (en) * | 2014-02-27 | 2014-06-18 | 常州大学 | Method for preparing high water absorbent resin by using reeds |
| CN105603541A (en) * | 2015-12-17 | 2016-05-25 | 雷春生 | Abutilon fiber preparation method |
| CN108330686A (en) * | 2018-01-02 | 2018-07-27 | 江苏大学 | The preparation method of the chitin modified basalt fibre carrier of hydrophily |
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