CN115520969B - Composite ecological restoration method for farmland drainage polluted river - Google Patents
Composite ecological restoration method for farmland drainage polluted river Download PDFInfo
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- CN115520969B CN115520969B CN202211173694.XA CN202211173694A CN115520969B CN 115520969 B CN115520969 B CN 115520969B CN 202211173694 A CN202211173694 A CN 202211173694A CN 115520969 B CN115520969 B CN 115520969B
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- floating bed
- growth promoter
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Classifications
-
- 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
-
- 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
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
- C02F3/325—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae as symbiotic combination of algae and bacteria
-
- 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
-
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
-
- 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
-
- 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
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biodiversity & Conservation Biology (AREA)
- Botany (AREA)
- Ecology (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Cultivation Of Plants (AREA)
Abstract
The invention provides a composite ecological restoration method for farmland drainage polluted river channels, and belongs to the technical field of environmental management. The composite ecological restoration method comprises the steps of putting microorganism growth promoters into a river channel, and arranging a composite ecological floating bed; the microbial growth promoter comprises the following components in percentage by mass: 45-55% of carbon source, 15-18% of nitrogen source, 6-7% of vitamin, 3.5-4.5% of macroelements, 2-3% of growth promoting components, 0.8-1.2% of microelements and 15-25% of carrier; the composite ecological floating bed takes a floating island as a main body, aquatic plants are planted on the upper part of the water surface of the floating island, and periphyton carriers are arranged on the lower part of the water surface. The invention utilizes the combination of the microbial growth promoter, the ecological floating bed and the periphyton to construct the ecological balance of river microorganisms and algae, and solves the problem of rural river sediment and water pollution caused by agricultural non-point source pollution. The composite ecological method has the advantages of low cost, simple maintenance, long-term use once, environment friendliness and no secondary pollution.
Description
Technical Field
The invention belongs to the technical field of environmental management, and particularly relates to a composite ecological restoration method for a farmland drainage polluted river channel.
Background
Agricultural non-point source pollution has been a main contributor to water pollution of the three rivers and the three lakes and rural surface in China for many years, and not only causes water eutrophication, but also seriously threatens drinking water safety. However, unlike industrial and domestic sewage, farmland drainage has the characteristics of low nitrogen and phosphorus concentration, unfixed discharge amount and discharge time, and the like, and rural river is a main discharge and transfer path thereof. The agricultural non-point source pollution, especially farmland drainage, becomes one of the main pollution sources of rural river channels in river network areas, the problems of rural river channel water eutrophication and the like are easily caused, and the drinking water safety in rural areas is seriously threatened. However, due to the characteristics of randomness, universality and the like of farmland drainage, the difficulty of treatment, prevention and control is high.
In the remediation of rural river channel non-point source pollution, the main treatment direction is ecological purification of the river channel and control of sediment pollution. The common river ecological purification technology comprises ecological bank protection, ecological floating beds, underwater forests and the like, and the principle is mainly that aquatic plants with purification effect on water quality are planted to absorb nitrogen and phosphorus in water so as to improve the water quality. However, the biological method only can purify water, is difficult to further repair the phenomenon of black and odorous water caused by substrate sludge pollution, and has lower nitrogen and phosphorus removal efficiency. The existing treatment methods which aim at controlling the pollution of the sediment, such as dredging and dredging, have high cost, flocculation precipitation, chemical coverage and the like, are easy to produce secondary pollution, and are not suitable for treating the rural river water pollution caused by agricultural non-point source pollution.
Microorganisms and algae are the basis of material circulation and energy flow of a river ecosystem, and a good microorganism-algae ecosystem is helpful for improving the self-cleaning capacity of a river and is a key for improving and recovering the water ecological environment. Microbial growth is currently promoted, usually by the administration of microbial growth promoters, to enhance their purification capacity. However, some microbial growth promoters only provide carbon sources and nitrogen sources for microorganisms, and the use of the microbial growth promoters has poor restoration effect on water pollution, and even the nutrient components in the microbial growth promoters can increase the nitrogen and phosphorus concentration of the water.
Aquatic plants are planted in the traditional floating bed, nitrogen and phosphorus in the water body are absorbed by the plants, but too little plant quantity planted in the floating bed can influence the pollution control effect of the plants, too much plant quantity can block sunlight in the water body, growth of aerobic microorganisms is inhibited, and ecological restoration of the water body is not facilitated. In addition, the repair effect on deeper water is poor due to the limitation of the root length of the aquatic plant.
Therefore, how to improve the traditional microorganism growth promoting agent and the traditional floating bed to effectively treat farmland drainage to pollute the rural river is a technical problem which needs to be solved at present.
Disclosure of Invention
In view of the above, the invention aims to provide a composite ecological restoration method for a farmland drainage polluted river channel, which integrates a microbial growth promoter, an ecological floating bed and a periphery Cong Shengwu, and can rapidly and efficiently remove nitrogen, phosphorus and the like in a river channel water body, radically solve the problem of pollution of river channel sediment, eliminate black and odorous sediment in a rural river channel, finally form ecological balance of river microorganism-algae and improve self-cleaning capability of a river.
In order to achieve the above object, the present invention provides the following technical solutions:
A composite ecological restoration method for a farmland drainage polluted river channel comprises the steps of putting a microorganism growth promoter into the river channel and arranging a composite ecological floating bed; the microbial growth promoter comprises the following components in percentage by mass: 45-55% of carbon source, 15-18% of nitrogen source, 6-7% of vitamin, 3.5-4.5% of macroelements, 2-3% of growth promoting components, 0.8-1.2% of microelements and 15-25% of carrier; the composite ecological floating bed takes a floating island as a main body, aquatic plants are planted on the upper part of the water surface of the floating island, and periphyton carriers are arranged on the lower part of the water surface.
Preferably, in the microbial growth promoter: the carbon source comprises glucose and trisodium citrate; nitrogen sources include aspartic acid, tryptophan, and alanine; vitamins include vitamin B 2, vitamin B 12, folic acid, and biotin; macroelements include sodium, magnesium, potassium, calcium, sulfur, and phosphorus; the growth promoting components comprise gibberellin, fulvic acid and auxin; the microelements comprise iron, copper, zinc, cobalt and manganese; the carrier is yeast extract.
Preferably, the preparation method of the microbial growth promoter comprises the following steps: weighing carbon source, nitrogen source, vitamins, macroelements, growth promoting components, microelements and carrier according to a certain proportion, uniformly mixing and grinding, naturally airing for 1-2h to obtain the microbial growth promoting agent.
Preferably, the microbial growth promoter is dosed at 50-60ppm.
More preferably, the microbial growth promoter is administered in the form of an aqueous solution having a concentration of 45-55g/L.
Preferably, the floating island is provided with a field planting hole, a flowerpot is placed in the field planting hole, and a planting medium is added to plant aquatic plants.
More preferably, the planting medium is river sediment.
More preferably, the aquatic plant planting density is 20-30 plants/m 2.
Preferably, the periplaneta biological carrier is a fiber rope, the length is 50-70cm, and the suspension density is 20-30 strips/m 2.
Preferably, the area of the composite ecological floating bed is 3-16m 2, and 8-10/1000 m 2 river channels are distributed.
Compared with the prior art, the invention has the following beneficial effects:
The invention provides a composite ecological restoration method for a farmland drainage polluted river, which improves the traditional microorganism growth promoting agent and an ecological floating bed and makes up for the short plates of the traditional microorganism growth promoting agent and the ecological floating bed.
The invention integrates various ecological purification means of microbial growth promoting agent, ecological floating bed and periphyton, so as to quickly and efficiently remove nitrogen, phosphorus, organic pollutants and the like in the river water body, radically eliminate black and odorous sediment pollution in the river, finally form an ecological balance system of river microorganism-algae, and improve the self-cleaning capability of the river.
The method has the advantages of low cost, convenient construction, once investment for long-term use, environmental protection, no secondary pollution, good ecological environmental benefit and suitability for large-area popularization in rural areas.
Drawings
Fig. 1: the invention relates to a plan for implementing river channel composite ecological restoration;
fig. 2: the invention relates to a schematic diagram of a composite ecological floating bed.
Detailed Description
The invention provides a compound ecological restoration method for a farmland drainage polluted river, which comprises the steps of putting a microorganism growth promoter into the river and arranging a compound ecological floating bed; the microbial growth promoter comprises the following components in percentage by mass: 45-55% of carbon source, 15-18% of nitrogen source, 6-7% of vitamin, 3.5-4.5% of macroelements, 2-3% of growth promoting components, 0.8-1.2% of microelements and 15-25% of carrier; the composite ecological floating bed takes a floating island as a main body, aquatic plants are planted on the upper part of the water surface of the floating island, and periphyton carriers are arranged on the lower part of the water surface.
The invention combines a plurality of ecological purification means of microbial growth promoting agent, ecological floating bed and periphyton into a whole, and jointly repairs the polluted river. Wherein:
The microbial growth promoter disclosed by the invention is added with substances such as vitamins, major elements, growth promoting components, trace elements and the like which are beneficial to microbial growth besides a carbon source and a nitrogen source, has a good repairing effect on the sediment after being used, can stimulate the reproduction of aerobic bacteria in the sediment, and improves the oxidative decomposition capability of the microorganisms on pollutants; the invention plants aquatic plants on the composite ecological floating bed, and nitrogen and phosphorus in the water body can be absorbed by the plants.
Periphyton is a collection of microbial aggregates and their interwoven non-biological substances, including bacteria, periphyton, fungi, protozoa, etc., grown on the surface of a flooded substrate and formed under natural environmental conditions, and is a stable, semi-open micro-ecosystem. The periphyton can remove nitrogen, phosphorus, organic matters and the like in the water body through various ways of absorption, adsorption, denitrification, degradation and the like. The carrier for enriching periphyton is additionally arranged at the bottom of the ecological floating bed, so that the growth and aggregation of periphyton can be accelerated, and nitrogen and phosphorus can be effectively removed.
Therefore, the microbial growth promoter is combined with the ecological floating bed and the periphyton carrier to construct an ecological balance system of river microorganisms and algae, so that the problem of rural river water pollution caused by agricultural non-point source pollution is effectively solved.
The carbon source is the main nutrient source for the microorganisms. The carbon source is preferably 50%; further preferably comprises 25-30% glucose and 20-25% trisodium citrate; more preferably, glucose is 27% and trisodium citrate is 23%.
Nitrogen is an important element constituting microbial nucleic acids and proteins. The invention prefers 16% of nitrogen source; further preferably comprises 5-6% aspartic acid, 5-6% tryptophan, 5-6% alanine; more preferably, aspartic acid is 6%, tryptophan is 5% and alanine is 5%.
Vitamins are closely related to the growth and metabolism of microorganisms. The preferred vitamin is 6.5%; further preferably comprises vitamin B 2 -2.5%, vitamin B 12 -3%, folic acid 1-1.2%, biotin 1-1.2%; more preferably vitamin B 2%, vitamin B 12 2.5.5%, folic acid 1% and biotin 1%.
The inorganic salt is a main component constituting cells, and can regulate osmotic pressure of cells, and also serves as an active center of enzyme to maintain enzyme activity. The invention prefers 4% macroelement; further preferably comprises NaNO 31-1.5％、MgSO40.5-1％、K2HPO40.5-1％、CaCl2 0.5.5-1%; more preferably, naNO 31％、MgSO41％、K2HPO41％、CaCl2%. Trace elements are related to enzyme activity, and lack of trace elements results in decreased physiological activity of microorganisms. The invention prefers trace elements of 1%; further preferably FeCl30.2-0.3％、CuSO40.2-0.3％、ZnSO40.2-0.3％、CoCl20.1-0.2％、MnCl20.1-0.2％;, more preferably FeCl 30.2％、CuSO40.2％、ZnSO40.2％、CoCl20.2％、MnCl2 0.2.2%.
The growth promoting component can promote the biological activity of the water body microorganism. The preferred generation promoting component of the invention is 2.5%; further preferably comprises gibberellin 0.6-1%, fulvic acid 0.6-1%, auxin 0.8-1%; more preferably gibberellin 0.8%, fulvic acid 0.8%, auxin 0.9%.
The preferred carrier of the invention is 20%; further preferred carriers are yeast extract.
The preparation method of the preferred microbial growth promoter comprises the following steps: weighing a carbon source, a nitrogen source, vitamins, major elements, growth promoting components, trace elements and a carrier according to a proportion, uniformly mixing and grinding, and naturally airing for 1-2 hours to obtain a microbial growth promoting agent; further preferably, the mixture is naturally dried for 1.5 hours. As an implementation way, 25-30 parts of glucose, 20-25 parts of trisodium citrate, 5-6 parts of aspartic acid, 5-6 parts of tryptophan, 5-6 parts of alanine, 1.5-2.5 parts of vitamin B 2, 2-3 parts of vitamin B 12, 1-1.2 parts of folic acid, 1-1.2 parts of biotin, 1-1.5 parts of NaNO 3, 0.5-1 part of MgSO 4, 0.5-1 part of K 2HPO4, 0.5-1 part of CaCl 2, 0.2-0.3 part of FeCl 3, 0.2-0.3 part of CuSO 4, 0.2-0.3 part of ZnSO 4, 0.1-0.2 part of CoCl 2, 0.1-0.2 part of MnCl 2, 0.6-1 part of gibberellin, 0.6-1 part of fulvic acid and 0.8-1 part of auxin are weighed according to parts by mass, and are evenly dried, mixed and the mixture is subjected to 1-2h to natural growth promoter.
The microbial growth promoters of the present invention are preferably administered at a dosage of 50 to 60ppm (relative to the water), more preferably 52 to 58ppm, and even more preferably 55ppm. Preferably, the microbial growth promoter is administered in the form of an aqueous solution having a concentration of 45-55g/L, further 50g/L. When the water is put in the form of aqueous solution, the water is preferably put in through a putting pipeline which is distributed at two sides of a river channel, it is further preferred that the drop tube spacing is 40-60m, more preferably 50m, as shown in figure 1.
The composite ecological floating bed consists of floating islands, aquatic plants, planting media, flowerpots and periphyton carriers. The floating island is provided with a field planting hole, a flowerpot is placed in the field planting hole, a planting medium is added to plant aquatic plants, the floating island floats on the water surface, and a periphyton carrier is arranged below the water surface, as shown in figure 2. The invention is not particularly limited to the form of installation of the periphyton carrier, including but not limited to suspension, adhesion, etc.
The preferred aquatic plants are one or more of calamus, iris and canna; further preferably, in the case of planting, a shorter individual is selected. The invention preferably has a planting density of 20-30 plants/m 2, more preferably 25 plants/m 2, and the aquatic plants are planted in the flowerpot, preferably 2-3 plants/pot.
The preferred planting medium of the invention is river sediment. The nutrient soil, the mixed matrix and the like are used as aquatic plant growth media, so that extra nitrogen and phosphorus can be brought and released into the river water body, and the original river sediment is used as the aquatic plant growth media, so that the extra nitrogen and phosphorus pollution can be avoided.
The periplaneta biological carrier is preferably a fiber rope, the length of the periplaneta biological carrier is 50-70cm, more preferably 60cm, still more preferably 0.5-3.0cm, and the suspension density is 20-30 strips/m 2, still more preferably 25 strips/m 2. As an alternative embodiment, the periphyton carrier of the present invention is suspended directly below the pot. The periphyton carrier can be used for enriching algae, bacteria and other microorganisms in water, forming periphyton on the surface of the carrier, and improving the nitrogen and phosphorus removal capability of the floating bed. The material of the fiber rope is not particularly limited in the present invention, and includes, but is not limited to, natural fibers or artificial fibers such as hemp ropes, cotton ropes, polyester fiber ropes, polyester ropes, and the like. The invention is not particularly limited to the pattern of the fiber rope, and includes, but is not limited to, spiral (braid), square, tassel, etc.
The invention preferably has the composite ecological floating bed area of 3-16m 2, more preferably the composite ecological floating bed is divided into a circle and a square, still more preferably the diameter of the circular ecological floating bed is 2-4m, the side length of the square ecological floating bed is 2-4m, the circular ecological floating bed is arranged at the place where farmland drainage enters a river channel, and the square ecological floating bed is arranged in the middle section of the river channel as shown in figure 1. The composite ecological floating beds are preferably distributed in 8-10/1000 m 2 river channels at intervals of 25-30m, and the composite ecological floating beds are further preferably distributed between the microbial growth promoter delivery areas. As an implementation mode, the composite ecological floating bed main body floating island is directly purchased to form a complete set of commercial floating island units, and the commercial floating island units comprise PE materials with good air permeability and convenient maintenance and management, and the like, and are freely combined and spliced to form a circular or square ecological floating bed.
In the present invention, all materials used are commercially available unless otherwise specified.
The technical solutions provided by the present invention are described in detail below with reference to examples, but they should not be construed as limiting the scope of the present invention.
Example 1
A composite ecological restoration method for farmland drainage polluted river channel comprises the following steps:
Salvaging the aquatic plants in the selected river course, then erecting microorganism growth promoting agent delivery pipelines on the bank side of the river course, and arranging each pipeline at intervals of 50m on two sides of the river course in sequence; building a composite ecological floating bed in the middle of a growth promoting agent feeding pipeline; the floating island units made of PE materials are freely combined, spliced and fixed into a round shape or a square shape, wherein round ecological floating beds are placed at the water drainage river inlet of the farmland, and the diameter of each round ecological floating bed is 3m; the middle of the experimental river course is provided with a square ecological floating bed with a side length of 3m, and 9/1000 m 2 river courses are arranged as shown in figure 1.
The composite ecological floating bed is provided with planting holes, a flowerpot is placed, river sediment is added into the flowerpot to serve as a planting medium, emergent aquatic plants with relatively low plant heights are planted, and three plants are all arranged: calamus, iris and canna, the planting density is 26 plants/m 2, 2 plants/basin; and a pericluster biological vector of 60cm length was hung under each pot for culturing pericycle Cong Shengwu, 2 pieces of pericluster biological vector/pot.
After the composite ecological floating bed and the microbial growth promoter feeding pipeline are built, the microbial growth promoter is fed, the microbial growth promoter and water are mixed into a growth promoter mixed solution with the concentration of 50g/L, and the dosage of the microbial growth promoter is fed to be 50ppm. The microbial growth promoter formulation is shown in table 1:
TABLE 1 microbial growth promoter formulation 1
| Composition of the components | Duty cycle (%) | Main component |
| Carbon source | 50 | Glucose 27%, trisodium citrate 23% |
| Nitrogen source | 16 | Aspartic acid 6%, tryptophan 5%, alanine 5% |
| Vitamins | 6.5 | Vitamin B 2%, vitamin B 12 2.5.5%, folic acid 1%, biotin 1% |
| Macroelements | 4 | NaNO31％、MgSO41％、K2HPO41％、CaCl21％ |
| Promoting the formation of a component | 2.5 | Gibberellin 0.8%, fulvic acid 0.8%, auxin 0.9% |
| Microelements | 1 | FeCl30.2％、CuSO40.2％、ZnSO40.2％、CoCl20.2％、MnCl20.2％ |
| Carrier body | 20 | Yeast extract 20% |
Example 2
A composite ecological restoration method for farmland drainage polluted river channel comprises the following steps:
Salvaging the aquatic plants in the selected river course, then erecting microorganism growth promoting agent delivery pipelines on the bank side of the river course, and arranging each pipeline at intervals of 40m on two sides of the river course in sequence; building a composite ecological floating bed in the middle of a growth promoting agent feeding pipeline; the floating island units made of PE materials are freely combined, spliced and fixed into a round shape or a square shape, wherein round ecological floating beds are placed at the water drainage river inlet of the farmland, and the diameter of each round ecological floating bed is 2m; the middle of the experimental river course is provided with a square ecological floating bed with a side length of 2m, and 10/1000 m 2 river courses are arranged.
The composite ecological floating bed is provided with planting holes, a flowerpot is placed, river sediment is added into the flowerpot to serve as a planting medium, emergent aquatic plants with relatively low plant heights are planted, and three plants are all arranged: calamus, iris and canna, the planting density is 20 plants/m 2, 2 plants/basin; and a pericluster biological vector of 50cm length was hung under each pot for culturing pericycle Cong Shengwu, 2 pieces of pericluster biological vector/pot.
After the composite ecological floating bed and the microbial growth promoter feeding pipeline are built, the microbial growth promoter is fed, the microbial growth promoter and water are mixed into a growth promoter mixed solution with the concentration of 45g/L, and the dosage of the microbial growth promoter is fed to be 55ppm. The microbial growth promoter formulation is shown in table 2:
TABLE 2 microbial growth promoter formulation 2
Example 3
A composite ecological restoration method for farmland drainage polluted river channel comprises the following steps:
Salvaging the aquatic plants in the selected river course, then erecting microorganism growth promoting agent delivery pipelines on the bank side of the river course, and arranging each pipeline at intervals of 60m on two sides of the river course in sequence; building a composite ecological floating bed in the middle of a growth promoting agent feeding pipeline; the floating island units made of PE materials are freely combined, spliced and fixed into a round shape or a square shape, wherein round ecological floating beds are placed at the water drainage river inlet of the farmland, and the diameter of each round ecological floating bed is 4m; the middle of the experimental river course is provided with a square ecological floating bed with a side length of 4m, and 8/1000 m 2 river courses are arranged.
The composite ecological floating bed is provided with planting holes, a flowerpot is placed, river sediment is added into the flowerpot to serve as a planting medium, emergent aquatic plants with relatively low plant heights are planted, and three plants are all arranged: calamus, iris and canna, the planting density is 30 plants/m 2, 3 plants/basin; and a pericluster biological vector 70cm long was hung under each pot for culturing pericycle Cong Shengwu, 3 pieces of pericluster biological vector/pot.
After the composite ecological floating bed and the microbial growth promoter feeding pipeline are built, the microbial growth promoter is fed, the microbial growth promoter and water are mixed into a 55g/L growth promoter mixed solution, and the dosage of the fed microbial growth promoter is 60ppm. The microbial growth promoter formulation is shown in table 3:
TABLE 3 microbial growth promoter formulation 3
| Composition of the components | Duty cycle (%) | Main component |
| Carbon source | 48 | Glucose 26%, trisodium citrate 22% |
| Nitrogen source | 15 | Aspartic acid 5%, tryptophan 5%, alanine 5% |
| Vitamins | 6 | Vitamin B 2 1.5.5%, vitamin B 12 2.1.1%, folic acid 1.2%, biotin 1.2% |
| Macroelements | 3.5 | NaNO31.1％、MgSO40.8％、K2HPO40.8％、CaCl20.8％ |
| Promoting the formation of a component | 2 | Gibberellin 0.6%, fulvic acid 0.6%, auxin 0.8% |
| Microelements | 0.8 | FeCl30.2％、CuSO40.2％、ZnSO40.2％、CoCl20.1％、MnCl20.1％ |
| Carrier body | 24.7 | Yeast extract 24.7% |
Example 4
The method is characterized in that Jurong city and leapfrog river white rabbit village river sections are selected as restoration objects, the river channel length of an experimental area is about 200m, the river surface width is 12-20m, the water depth is 0.8-1.3m, discharge pipelines are erected, each pipeline is spaced by 50m, the pipelines are sequentially arranged on two sides of the river channel, and 4 of the two banks are erected on the left and right sides of the 200m river section, and the total number of the pipelines is 8. And before treatment, collecting the jump-in river water sample to measure the total nitrogen, total phosphorus and COD concentration in the water, and collecting the river sediment to measure the microbial activity (FDA) and the biodegradability (G value) of the sediment. The total nitrogen concentration of the river water is 2.70mg/L, the total phosphorus concentration is 0.05mg/L, and the COD concentration is 40.53mg/L; the microbial activity (FDA) of the substrate sludge is 0.015A/G, and the biodegradability (G value) is 0.18G/(Kg.times.h).
The water quantity of the experimental river reach is about 1600m 3, the compound ecological restoration is carried out in the mode of the embodiment 1, 1600L of microorganism growth promoting agent is put in, 8 pipelines are respectively put in from two sides, 200L of each pipeline is put in, after the compound ecological floating bed is arranged, water samples are collected every 7 days for measuring the total nitrogen, the total phosphorus and the COD concentration in the first month, and water samples and mud samples are collected for 1 time every month for monitoring pollution restoration conditions in the second month.
The monitoring result shows that after the microbial growth promoter is added and the composite ecological floating bed is distributed, the total nitrogen concentration of the water body in the first week is 2.01-2.25mg/L, the total nitrogen concentration of the water sample in the second week is 1.98-2.19mg/L, the total nitrogen concentration in the third week is reduced to 1.89-2.13mg/L, and the total nitrogen concentration in the fourth week is reduced to 1.72-1.91mg/L. The total phosphorus concentration in the river channel is lower, and compared with the total phosphorus concentration in the water body after the experiment is carried out before the microbial growth promoter and the composite ecological floating bed are put in, the total phosphorus concentration in the water body is reduced to 0.02-0.03mg/L. After the microbial growth promoter is added for one week, the COD concentration is increased to 50.52-56.15mg/L with smaller amplitude, the COD concentration is slowly reduced from the second week to 25.87-31.07mg/L in the fourth week.
Monitoring the water sample in the second month, wherein the total nitrogen concentration is reduced to 1.57-1.61mg/L, the total phosphorus concentration is basically unchanged, and the COD content is 11.37-12.18mg/L; after the third month, the monitoring water sample finds that the total nitrogen concentration is reduced to 1.31-1.42mg/L, the total phosphorus concentration is below 0.03mg/L, and the COD concentration is reduced to 7.87-8.24mg/L. The monitoring result of mud samples in each month shows that the microbial activity (FDA) of the sediment in the first month after the growth promoter is added is increased to 0.022-0.025A/g, the microbial activity in the second month starts to be reduced to 0.018-0.021A/g, and the microbial activity in the third month is similar to the microbial activity before the growth promoter is added to 0.015-0.018A/g. The biodegradability (G value) rises to 1.05-1.1G/(Kg.h) in the first month after administration, continues to accelerate and slow in the second month, rises to 1.19-1.28G/(Kg.h), and starts to decline to 0.30-0.36G/(Kg.h) in the third month. The composite ecological restoration method provided by the invention can obviously reduce the total nitrogen and COD concentration in the farmland drainage polluted rural river, improve the reproductive capacity of microorganisms in the sediment, radically eliminate the black and odorous sediment pollution in the rural river and improve the self-cleaning capacity of the river on nitrogen, phosphorus and organic matters.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.
Claims (5)
1. A composite ecological restoration method for a farmland drainage polluted river is characterized by comprising the steps of putting a microbial growth promoter into the river and arranging a composite ecological floating bed;
The microbial growth promoter comprises the following components in percentage by mass: 45-55% of carbon source, 15-18% of nitrogen source, 6-7% of vitamin, 3.5-4.5% of macroelements, 2-3% of growth promoting components, 0.8-1.2% of microelements and 15-25% of carrier;
The carbon source comprises 25-30% of glucose and 20-25% of trisodium citrate; the nitrogen source comprises 5-6% of aspartic acid, 5-6% of tryptophan and 5-6% of alanine; the vitamins comprise 1.5-2.5% of vitamin B 2, 2-3% of vitamin B 12, 1-1.2% of folic acid and 1-1.2% of biotin; the macroelements comprise NaNO 31-1.5％、MgSO40.5-1％、K2HPO40.5-1％、CaCl2 0.5.5-1%; the said growth promoting components include gibberellin 0.6-1%, fulvic acid 0.6-1% and auxin 0.8-1%; the microelements comprise FeCl30.2-0.3％、CuSO40.2-0.3％、ZnSO40.2-0.3％、CoCl20.1-0.2％、MnCl20.1-0.2％;, wherein the carrier is yeast extract;
The dosage of the microbial growth promoter is 50-60ppm;
The composite ecological floating bed takes a floating island as a main body, aquatic plants are planted at the upper part of the water surface of the floating island, and periphyton carriers are arranged at the lower part of the water surface; the floating island is provided with a field planting hole, a flowerpot is placed in the field planting hole, planting media are added to plant aquatic plants, the planting media are river bottom mud, and the planting density of the aquatic plants is 20-30 plants/m 2.
2. The composite ecological restoration method according to claim 1, wherein the preparation method of the microbial growth promoter comprises the following steps:
Weighing carbon source, nitrogen source, vitamins, macroelements, growth promoting components, microelements and carrier according to a certain proportion, uniformly mixing and grinding, naturally airing for 1-2h to obtain the microbial growth promoting agent.
3. The composite ecological restoration method according to claim 1, wherein the microbial growth promoter is put in the form of an aqueous solution, and the concentration of the aqueous solution is 45-55g/L.
4. The composite ecological restoration method according to claim 1, wherein the periplaneta biological carrier is a fiber rope, the length is 50-70cm, and the suspension density is 20-30 strips/m 2.
5. The composite ecological restoration method according to claim 1, wherein the composite ecological floating bed area is 3-16m 2, and 8-10/1000 m 2 river channels are laid.
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