CN114409087A - Urban inland river in-situ ecological restoration method - Google Patents
Urban inland river in-situ ecological restoration method Download PDFInfo
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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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G22/00—Cultivation of specific crops or plants not otherwise provided for
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- 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
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- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
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- 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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- E—FIXED CONSTRUCTIONS
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- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/04—Structures or apparatus for, or methods of, protecting banks, coasts, or harbours
- E02B3/12—Revetment of banks, dams, watercourses, or the like, e.g. the sea-floor
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
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Abstract
The invention provides an urban inland river in-situ ecological restoration method, which comprises the following steps: constructing an auxiliary river channel: an auxiliary river channel is constructed beside the main river channel, and the treatment scale is 7500-8500m3D; building block stone, wood-like piles and plant revetment: placing gravels on the river bank and the river water transition zone, inserting wood-like piles into the gravel zone, and planting alfalfa on the gravel zone; planting auxiliary river plants: dividing the auxiliary river into a front section purification area and a rear section stabilization area; constructing a soil ridge and a soil ridge slope in the front-section purification areaPlanting the tape grass, and paving acclimatized bottom mud containing an adsorbent at the bottom of the ridge; planting aquatic plants in the rear-section stable area; configuring facilities: and an air supply pipe ring with air holes is arranged on the side slope of the ridge. The method for in-situ ecological restoration of the urban inland river constructed by the invention ensures that the water quality index stably reaches the II-class standard of surface water, effectively reduces the concentration of water pollutants and the eutrophication of the water body, can form an ecological system which can be self-maintained, virtuous cycle and has vitality, and effectively realizes the improvement of the self-purification capacity of the river.
Description
Technical Field
The invention relates to the technical field of ecological restoration, in particular to an in-situ ecological restoration method for urban inland rivers.
Background
Rivers have important roles in urban development, and can provide drinking water sources, create landscapes, discharge floods, receive sewage and the like. Because the health requirements of the river ecosystem are ignored in the traditional hydraulic engineering construction, negative influences of different degrees are brought to the river ecosystem. The research of China on river ecological restoration is only twenty or thirty years, and typical cases include ecological management engineering of a Beijing cold water river, multiple natural management of a Chengdu south river and comprehensive water environment management of Shanghai Suzhou river.
The problem of river water pollution can be relieved by improving a pollution treatment technology, but the situation of the habitat and the biological diversity of the river is still not ideal, and the existing treatment measures only pay attention to the improvement of water quality because the integrity of an ecological system is not considered in most cases, and the problem of water pollution of the river is difficult to be fundamentally solved without considering the construction of the diversity of the ecological system, so that the self-cleaning capacity of the river is not ideal. The pollution problem of the river water in the sweet pit is treated in the early stage of the project, and an ideal result is not achieved.
Disclosure of Invention
In view of the above, the present invention provides an in-situ ecological restoration method for urban inland rivers, which solves the above problems.
The technical scheme of the invention is realized as follows:
an in-situ ecological restoration method for urban inland rivers comprises the following steps:
(1) constructing an auxiliary river channel: constructing an auxiliary river channel beside the main river channel, wherein the width is 4-5m, the depth is 2-3m, and the treatment scale is 7500-8500m3D, the thickness of the auxiliary river channel substrate layer is 20-30 cm;
(2) building block stone, wood-like piles and plant revetment: placing gravels with the particle size of 20-30mm and the width of 0.5-0.6m on the river bank and river water transition zone to form a gravel zone, inserting wood-like piles into the gravel zone at an interval of 0.6-1.2m, and planting alfalfa on the gravel zone with the plant spacing of 0.3-0.5 m;
(3) planting auxiliary river plants: dividing the auxiliary river into a front section purification area and a rear section stabilization area; constructing soil banks at intervals of 2.5-3.5m in the front purification area, and planting 30-40 plants/m of tape grass on one side of the soil bank slope2Planting depth is 1.8-2 m; domesticated bottom mud containing an adsorbent is laid at the bottom of the ridge, and the thickness of the domesticated bottom mud is 0.2-0.3 m;
planting 30-40 aquatic plants/m in the rear-section stable area2Forming planting zones, wherein the interval between every two planting zones is 4-5 m; the area ratio of the ridges to the tape grass to the aquatic plants is 1: 0.8: 1.5;
(4) configuring facilities: air supply pipe rings with air holes are arranged on two sides of the ridge slope, and oxygen is increased for 4-5 hours every night.
Further, the length of the wood-like pile is 0.8-0.85m, the width is 0.5-0.55m, and the height is 0.3-0.35 m.
Further, the length of the ridge is 3.5-4m, the width is 1-1.2m, and the height is 0.4-0.5m higher than the river surface.
Further, in the step (3), the adsorbent is prepared from cellulose nitrate, calcium oxide, bentonite and calcium lignosulfonate.
Further, the preparation method of the adsorbent comprises the following steps: mixing calcium oxide and bentonite, calcining at the temperature of 500-600 ℃ for 1-2h, adding cellulose nitrate and calcium lignosulfonate, drying, and performing extrusion forming to obtain the adsorbent.
Further, the particle size of the adsorbent is 0.5-3.5 mm; the mass ratio of the cellulose nitrate to the calcium oxide to the bentonite to the calcium lignosulfonate is 0.2: 0.6: 1: 0.05-0.06.
Further explaining, in the step (3), the domesticated bottom sediment is obtained by adding 0.5 wt% of cellulomonas flavigena culture solution and 20 wt% of water into the bottom sediment and culturing for 24-36 h; the acclimatized substrate sludge containing the adsorbent is obtained by adding 2 wt% of adsorbent into the acclimatized substrate sludge and stirring for 2 h.
Further, the water is river water taken from a main river.
Further, the Cellulomonas flavigena culture solution is prepared by inoculating Cellulomonas flavigena (Cellulomonas flavigena) to liquid culture medium with an inoculum size of 70-80cfu/mL, and culturing to OD600The value is 4-4.5.
Further, in the step (3), the aquatic plants are calamus, water lily and watermifoil.
Compared with the prior art, the invention has the beneficial effects that:
according to the method, an in-situ ecological restoration mode of the urban inland river is established by constructing an auxiliary river channel, building stones, wood-like piles, plant revetments, planting auxiliary river plants and configuring infrastructures, so that all water quality indexes can stably reach the II-type standard of surface water environmental quality standard (GB3838-2002), the concentration of pollutants in the water body is effectively reduced, the concentration of dissolved oxygen in the water body is improved, and the risk of water body eutrophication can be further reduced; is favorable for establishing an ecological system with various species and improving the purification capacity of the system to the water body. According to the invention, the shoal revetment is constructed to provide foothold for aquatic plants and microorganisms by arranging deep and shallow staggered falling in the river channel, and the water purifying plants are matched to provide habitat for phytoplankton, so that a diversified and multi-level ecological environment is established, an ecological system which can be self-maintained, virtuous cycle and has vitality can be formed, and the improvement of the self-purification capability of the river is effectively realized.
In addition, the invention adopts the adsorbent and the domesticated bottom mud, is arranged at the bottom of the soil ridge of the front-section purification area of the river channel and is combined with submerged plants to form the continuous adsorption and slow release effects of microorganisms, bottom mud and plants, thereby not only enriching the aquatic environment, being beneficial to the diversity of zooplankton and bacteria of the culture system, but also playing the role of purifying water quality, avoiding the damage of flood washing and silt burying to the environment, and effectively improving the stability of the river channel ecosystem and the self-purification capability of rivers.
Drawings
FIG. 1 is a schematic diagram of an auxiliary riverway construction according to the invention; note: 1 is a main riverway, 2 is an auxiliary riverway rear-section stable area, 3 is a stone block-wood-like pile-plant revetment, and 4 is an auxiliary riverway front-section purification area;
fig. 2 is a field situation diagram of a project engineering auxiliary river front section purification area.
Detailed Description
In order to better understand the technical content of the invention, specific examples are provided below to further illustrate the invention.
The experimental methods used in the examples of the present invention are all conventional methods unless otherwise specified.
The materials, reagents and the like used in the examples of the present invention can be obtained commercially without specific description.
Example 1
The artificial simulation riverway is positioned in a Ganjin research base of environmental science research institute in Shenzhen city, the total length is 100m, the experiment is carried out under natural conditions, the effluent of the Ganjin artificial wetland directly enters the simulation riverway, and the hydraulic retention time in the simulation riverway is 4 days.
Experimental groups:
dividing the simulated river into a front section purification area and a rear section stabilization area; constructing soil banks at intervals of 15cm in the front purification area, and planting 35 plants/m of tape grass on one side of the soil bank slope2The planting depth is 1.8m, and domesticated bottom mud containing an adsorbent with the thickness of 0.2m is paved at the bottom of the ridge;
planting 35 aquatic plants/m in the rear stable area2Forming planting zones, wherein the interval between every two planting zones is 24 cm; wherein, the area ratio of the soil ridge, the tape grass and the aquatic plant is 1: 0.8: 1.5, the aquatic plants are mixed and planted with acorus calamus, water lily and watermifoil;
the adsorbent is prepared from cellulose nitrate, calcium oxide, bentonite and calcium lignosulfonate in a mass ratio of 0.2: 0.6: 1: 0.05, mixing calcium oxide and bentonite, calcining at 550 ℃ for 1.5h, adding cellulose nitrate and calcium lignosulfonate, drying, carrying out extrusion forming to obtain an adsorbent with the particle size of 3mm, adding 2 wt% of adsorbent into the domesticated bottom mud, and stirring for 2h to obtain domesticated bottom mud containing the adsorbent;
the domesticated bottom mud is obtained by adding 0.5 wt% of cellulomonas flavigena culture solution and 20 wt% of river water of Ganmu river into the bottom mud, and culturing for 36 h; inoculating 70cfu/mL of cellulomonas flavigena to the nutrient gravy for cultivationCulturing to OD600The value is 4, and the culture solution of the cellulomonas flavigena is obtained, and the formula of the culture medium is as follows: 10g of peptone, 3g of beef extract, 5g of NaCl, 1L of distilled water and pH 7.0.
Comparative group 1:
the method for planting simulated riverway plants according to the experimental group is characterized in that bottom mud is adopted to replace domesticated bottom mud, and the preparation method of the bottom mud containing the adsorbent comprises the following steps: adding 2 wt% of adsorbent and 0.5 wt% of cellulomonas flavigena culture solution into the substrate sludge, and stirring for 2h to obtain the substrate sludge containing the adsorbent, wherein the adsorbent and the cellulomonas flavigena culture solution are the same as the preparation method of the experimental group.
Comparative group 2: the simulated riverway plants were planted according to the experimental group, and the difference was that the acclimated bottom sediment did not contain an adsorbent, and only the adsorbent was applied in the simulated riverway.
Comparative group 3: the river plant is simulated according to the planting of the experimental group, and the difference is that domesticated bottom mud containing an adsorbent is not paved at the bottom of the soil ridge.
The experimental method comprises the following steps:
(1) water sample monitoring and detecting method
And starting to collect a water sample for analysis after the system is debugged and operated for 1 month. According to on-site research, 2 sampling points are arranged in Total, namely a 1# artificial wetland water outlet (simulated river water inlet) and a 2# simulated river downstream, the detection index is TN (Total nitrogen, Total nitrate, TN), a Hash DR900 portable multi-parameter colorimeter is adopted, and the TN content in the simulated river is calculated by a low-range sulfate oxidation method.
(2) Biological sample monitoring and collecting method
According to the field research, 2 ecological investigation stations are arranged in total. The ecological restoration method comprises a water inlet, a middle section and a water outlet of a simulation river channel, and is used for researching the ecological establishment process of the simulation river channel after ecological restoration.
(3) Submerged plant growth monitoring and detecting method
Collecting submerged plants in the simulated riverway, calculating the fresh weight of root systems of the submerged plants by using a balance, and researching the influence of the ecological environment of the simulated riverway on the submerged plants after ecological restoration.
(4) Microorganism sample monitoring and detecting method
Collecting microorganism samples of root soil of submerged plants in a simulated riverway, collecting 3 groups of parallel samples respectively, researching the growth process and variety of the microorganisms in the simulated riverway after ecological restoration, analyzing and identifying dominant bacteria and main functions of the system, taking phosphorus functional bacteria as research objects, and calculating the relative abundance of nitrobacteria in the system.
(5) Biological growth condition evaluation method
And analyzing the structural characteristics of phytoplankton and zooplankton community by using an index reflecting the biological community characteristic and a diversity index (H'). The calculation formula is as follows:
Shannon-Wiener diversity index:
in the formula: pi is ni/N;
ni: number of individuals of the i-th species (ind. m)-3)；
N: total number of organisms (ind. m) at a certain station-3)；
S: the total number of organisms appeared.
The results are shown in Table 1:
as can be seen from the table above, the removal rate of TN by the simulated riverway of the experimental group can reach 79.6%, and the diversity indexes of phytoplankton and zooplankton are 4.17 and 2.86 respectively; the Shannon-Wiener diversity index H of the phytoplankton is more than 3, which indicates that the simulated river channel is in a light-polluted or non-polluted state, the habitat condition of the phytoplankton is good, and the species composition is relatively uniform; the Shannon-Wiener diversity index of the zooplankton is at the upper-middle level, which shows that the zooplankton can adapt to the growth of the zooplankton after simulating a river channel, and the field investigation of biological samples shows that the types of rotifers are the most, and then plankton and copepods are obtained; the relative abundance of nitrobacteria is averagely 1.126, and the fresh weight of the root system of the tape grass is higher; according to the TN value, the diversity index, the relative abundance of nitrobacteria and the fresh weight of the roots of the tape grass of the simulated riverway, the initial establishment of the ecological system of the simulated riverway is successful and gradually complicated, which is beneficial to restoring the ecological environment of the riverway and improving the purification capacity of the system to the water body.
The diversity index and the relative abundance of nitrobacteria of the comparison group 1 and the comparison group 2 are lower, which indicates that the adsorbent and the domesticated bottom mud are adopted, and can cooperate with each other, so that the aerobic-anoxic-anaerobic environment in the root soil of the submerged plant promotes the formation of the continuous adsorption and slow release effect of the microorganism-bottom mud-plant, and the abundant aquatic environment is beneficial to the growth of various zooplankton and bacteria, and plays a role in absorbing phosphorus, nitrogen and other substances in the water body and purifying the water quality together.
Example 2
The Ganju river in Shenzhen Longgang region is selected as a research object, ecological restoration is carried out on the river channel at the front section of the entrance of the Ganju river into the reservoir, the Ganju village is positioned on the Buji street in the Shenzhen Longgang region and is located at the upstream of the drinking water source in the Pinghu town, namely the Ganju reservoir, and the domestic sewage and the production wastewater are directly discharged into the Ganju reservoir through the Ganju river.
Aiming at the problems of water quality pollution and flood-carrying safety of the sweet-scented pit rivers, water coming from the upstream of the sweet-scented pit rivers in the non-flood season is led to a project area, the water quality is purified through biological measures, the main riverway of the sweet-scented pit rivers entering a reservoir is provided with 1660m total length of grooves, 5m width, 3m depth and 25cm thickness of a substrate layer, an auxiliary riverway is constructed, and terraces 3365m with length multiplied by width of 3 multiplied by 1m are constructed2The ridge is 0.5m higher than the river surface, and the area of the ridge for planting the tape grass is 2690m2And total area of 5048m of aquatic plants2The storage capacity in the range of the earth ridge and the groove is 12450m3Air supply pipe rings with air holes are arranged on two sides of the ridge slope, oxygen is increased for 4.5 hours every night, and the aquatic plants are calamus, water lily and watermifoil, and the method comprises the following steps: 1: 1, planting;
designing parameters:
(1) auxiliary river course treatment scale 8000m3D, restoring the river channel in situ for 1.66 km;
(2) placing gravels with the particle size of 25mm on the river bank of the auxiliary river channel and the river water transition zone, wherein the width of the gravels is 0.5m to form a gravels zone, inserting wood-like piles with the length multiplied by the width multiplied by the height of 0.8 multiplied by 0.5 multiplied by 0.3m into the gravels zone, spacing of 0.8m, planting alfalfa on the gravels zone, and planting distance of 0.4m to form a rock block, the wood-like piles and a plant revetment;
(3) constructing soil banks at intervals of 2.5m in the front purification area, and constructing 35 plants/m of tape grass2Planting depth is 1.8 m; in the rear stable area, 35 aquatic plants/m are planted at intervals of 4m2Forming a planting belt;
(4) domesticated bottom mud which is 0.2m thick and contains an adsorbent with the particle size of 3mm is paved at the bottom of the ridge, wherein the adsorbent is prepared by mixing cellulose nitrate, calcium oxide, bentonite and calcium lignosulphonate according to the mass ratio of 0.2: 0.6: 1: 0.05, mixing calcium oxide and bentonite, calcining at 550 ℃ for 1.5h, adding cellulose nitrate and calcium lignosulfonate, drying, and performing extrusion forming to obtain the calcium lignosulfonate; adding 0.5 wt% of cellulomonas flavigena culture solution and 20 wt% of river water of the Ganmu river into the bottom mud, culturing for 36h to obtain domesticated bottom mud, adding 2 wt% of adsorbent, and stirring for 2h to obtain domesticated bottom mud containing the adsorbent; the culture solution for producing cellulomonas flavigena is prepared by inoculating 70cfu/mL of cellulomonas flavigena to nutrient broth culture medium, and culturing to OD600The value is 4, the medium formula is: 10g of peptone, 3g of beef extract, 5g of NaCl, 1L of distilled water and pH 7.0;
(5) and 2 sampling points are arranged, namely the sampling points entering the upstream of the sweet pit river and the auxiliary river entering the warehousing entrance of the sweet pit reservoir respectively, the monitoring results are shown in tables 3 and 4, the detection methods are shown in table 2, and NH3-N (ammonia nitrogen), TN (Total nitrogen, TN), TP (Total phosphorus, TP) and DO (dissolved oxygen, DO) are detected.
TABLE 2 Water quality testing method (unit: mg/L)
TABLE 3 Water quality upstream of Ganmu river (unit: mg/L)
| Date | NH3-N | TN | TP | DO |
| 20200202 | 2.86 | 7.75 | 0.886 | 4.21 |
| Water of class V on earth's surface | ≤2.0 | ≤2.0 | ≤0.4 | ≥2 |
From the monitoring results, the concentration range of the main pollutants of the sweet pit river is as follows: NH3-N is 2.86mg/L, TN is 7.75mg/L, TP is 0.886mg/L, and the main pollution characteristics are that nitrogen and phosphorus exceed the standard and are basically in class V or class inferior V.
TABLE 4 quality of water (unit: mg/L) at entrance of auxiliary riverway into sweet pit reservoir
| Date | NH3-N | TN | TP | DO |
| 20200202 | 0.157 | 0.56 | 0.38 | 8.33 |
| 20201201 | 0.123 | 0.30 | 0.03 | 12.8 |
| Surface class II water | ≤0.5 | ≤0.5 | ≤0.1 | ≥6 |
As can be seen from the above table, the water quality indexes can stably reach the II-class standard of the environmental quality Standard for surface Water (GB3838-2002), so that the concentration of water pollutants is effectively reduced, the concentration of dissolved oxygen is greatly increased, and the risk of water eutrophication is further reduced.
In the project, the bottom sediment is not considered to be paved at the bottom of the earth ridge in the early stage, the TN content is greatly changed, and surface water (NH3-N, TP and DO indexes) can stably reach the IV standard.
In conclusion, the method for in-situ ecological restoration of the urban inland river constructed by the invention has good ecological restoration condition in the system, is not influenced by flood fluctuation, and can purify the water quality from the inferior V type to the II type water, so that the system has ideal self-purification capacity, meets the target requirement, is suitable for the growth of various organisms, and is more beneficial to the improvement of the self-purification capacity of the water body; experimental engineering shows that the problem of poor self-purification capability of a river ecosystem can be effectively solved by constructing an auxiliary river channel, building rock blocks, wood-like piles, plant revetment, planting auxiliary river plants and configuring infrastructure.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. An in-situ ecological restoration method for urban inland rivers is characterized by comprising the following steps:
(1) constructing an auxiliary river channel: constructing an auxiliary river channel beside the main river channel, wherein the width is 4-5m, the depth is 2-3m, and the treatment scale is 7500-8500m3D, the thickness of the auxiliary river channel substrate layer is 20-30 cm;
(2) building block stone, wood-like piles and plant revetment: placing gravels with the particle size of 20-30mm and the width of 0.5-0.6m on the river bank and river water transition zone to form a gravel zone, inserting wood-like piles into the gravel zone at an interval of 0.6-1.2m, and planting alfalfa on the gravel zone with the plant spacing of 0.3-0.5 m;
(3) planting auxiliary river plants: dividing the auxiliary river into a front section purification area and a rear section stabilization area; constructing soil banks at intervals of 2.5-3.5m in the front purification area, and planting 30-40 plants/m of tape grass on one side of the soil bank slope2Planting depth is 1.8-2 m; domesticated bottom mud containing an adsorbent is laid at the bottom of the ridge, and the thickness of the domesticated bottom mud is 0.2-0.3 m;
planting 30-40 aquatic plants/m in the rear-section stable area2Forming planting zones, wherein the interval between every two planting zones is 4-5 m; the area ratio of the ridges to the tape grass to the aquatic plants is 1: 0.8: 1.5;
(4) configuring facilities: air supply pipe rings with air holes are arranged on two sides of the ridge slope, and oxygen is increased for 4-5 hours every night.
2. The method for in-situ ecological restoration of the urban inland river according to claim 1, wherein the wood-like piles have a length of 0.8-0.85m, a width of 0.5-0.55m and a height of 0.3-0.35 m.
3. The method for in-situ ecological restoration of the urban inland river according to claim 1, wherein the ridge has a length of 3.5-4m, a width of 1-1.2m and a height of 0.4-0.5m above the river surface.
4. The method for in-situ ecological restoration of urban rivers according to claim 1, wherein in the step (3), the adsorbent is made of cellulose nitrate, calcium oxide, bentonite and calcium lignosulfonate.
5. The method for in-situ ecological restoration of the urban inland river according to claim 4, wherein the preparation method of the adsorbent comprises the following steps: mixing calcium oxide and bentonite, calcining at the temperature of 500-600 ℃ for 1-2h, adding cellulose nitrate and calcium lignosulfonate, drying, and performing extrusion forming to obtain the adsorbent.
6. The method for in-situ ecological restoration of the urban inland river according to claim 4 or 5, wherein the particle size of the adsorbent is 0.5-3.5 mm; the mass ratio of the cellulose nitrate to the calcium oxide to the bentonite to the calcium lignosulfonate is 0.2: 0.6: 1: 0.05-0.06.
7. The method for in-situ ecological restoration of the urban inland river according to claim 1, wherein in the step (3), the domesticated bottom mud is obtained by adding 0.5 wt% of cellulomonas flavigena culture solution and 20 wt% of water into the bottom mud and culturing for 24-36 h; the domesticated bottom mud containing the adsorbent is obtained by adding 2 wt% of the adsorbent into the domesticated bottom mud and stirring for 2 hours.
8. The method for in-situ ecological restoration of the urban rivers according to claim 7, wherein the water is river water taken from a main river channel.
9. The method for in-situ ecological restoration of the urban inland river according to claim 7, wherein the cellulomonas flavigena culture solution is prepared by inoculating cellulomonas flavigena to a liquid culture medium with an inoculum size of 70-80cfu/mL, and culturing to OD600The value is 4-4.5.
10. The method for in-situ ecological restoration of urban rivers according to claim 1, wherein in the step (3), the aquatic plants are Acorus calamus, water lily and watermifoil.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0889126A (en) * | 1994-07-25 | 1996-04-09 | Tama Ogasawara | Gradually iron ion-releasing concrete structure |
| CN106186343A (en) * | 2016-08-26 | 2016-12-07 | 广州市戴斌生态环境科技有限公司 | A kind of comprehensive processing method to urban river |
| CN109295918A (en) * | 2018-10-29 | 2019-02-01 | 中国电建集团贵阳勘测设计研究院有限公司 | River course microbial habitat reforms transform and water purification device |
| CN111285470A (en) * | 2020-03-24 | 2020-06-16 | 中交广州航道局有限公司 | Riverway bypass water purification wetland system |
| CN112158962A (en) * | 2020-09-29 | 2021-01-01 | 深圳合民生物科技有限公司 | Microbial water body in-situ treatment flora purification body and sewage treatment method adopting same |
| CN113683277A (en) * | 2021-09-01 | 2021-11-23 | 江苏五湖生态环境科技有限公司 | Slow-release disintegrating microbial preparation for treating black and odorous water body sediment and preparation method thereof |
-
2021
- 2021-12-30 CN CN202111654229.3A patent/CN114409087A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0889126A (en) * | 1994-07-25 | 1996-04-09 | Tama Ogasawara | Gradually iron ion-releasing concrete structure |
| CN106186343A (en) * | 2016-08-26 | 2016-12-07 | 广州市戴斌生态环境科技有限公司 | A kind of comprehensive processing method to urban river |
| CN109295918A (en) * | 2018-10-29 | 2019-02-01 | 中国电建集团贵阳勘测设计研究院有限公司 | River course microbial habitat reforms transform and water purification device |
| CN111285470A (en) * | 2020-03-24 | 2020-06-16 | 中交广州航道局有限公司 | Riverway bypass water purification wetland system |
| CN112158962A (en) * | 2020-09-29 | 2021-01-01 | 深圳合民生物科技有限公司 | Microbial water body in-situ treatment flora purification body and sewage treatment method adopting same |
| CN113683277A (en) * | 2021-09-01 | 2021-11-23 | 江苏五湖生态环境科技有限公司 | Slow-release disintegrating microbial preparation for treating black and odorous water body sediment and preparation method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 严力蛟等: "《生态研究与探索》", 北京：中国环境科学出版社, pages: 285 * |
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