CN115259405A - Ecological management method for tail water drainage and irrigation river of pond culture - Google Patents
Ecological management method for tail water drainage and irrigation river of pond culture 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
- C02F3/34—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
- C02F3/02—Aerobic processes
- C02F3/10—Packings; Fillings; Grids
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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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
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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
- 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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- 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
- C02F3/348—Biological treatment of water, waste water, or sewage characterised by the microorganisms used characterised by the way or the form in which the microorganisms are added or dosed
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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
- C02F7/00—Aeration of stretches of water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- 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
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
- C02F2203/008—Mobile apparatus and plants, e.g. mounted on a vehicle
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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
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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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Abstract
The invention relates to an ecological management method of a pond culture tail water irrigation and drainage river, which comprises the following steps: s1: arranging an ecological floating frame in the drainage and irrigation river; s2: arranging a biological contact oxidation area of the simulated aquatic weed filler in the drainage and irrigation river; s3: a plurality of aeration type oxygen increasing machines are arranged in the drainage and irrigation river; s4: an ecological floating island restoration area is arranged in the irrigation and drainage river; s5: intermittently adding microbial strains into the drainage and irrigation river; s6: taking the steps S1-S5 as a basic ecological management unit, and arranging at least one basic ecological management unit in the drainage and irrigation river; s7: and in the period of controlling the drainage and irrigation river, water body sampling detection is carried out for many times every month. Mainly aims at treating the fishpond tail water by matching the irrigation and drainage river with rising tide and falling tide, thereby reducing the investment cost; an internal circulation can be formed in the flood season, so that the treatment cost according to other physical and chemical methods is reduced; the method for treating the drainage and irrigation river has low application cost, and the water quality of the drainage and irrigation river can be stably discharged up to the standard, belonging to the technical field of sewage treatment.
Description
Technical Field
The invention relates to the technical field of sewage treatment, in particular to an ecological treatment method for a pond culture tail water irrigation and drainage river.
Background
At present, a pond culture tail water treatment system mainly comprises physical, chemical and ecological treatment methods (a physical treatment system comprises mechanical filtration, foam separation, membrane separation and the like, a chemical treatment system comprises ozone treatment, electrochemistry, chemical preparations and the like, wang Yan Ni, wang Jinle, a pond culture tail water purification treatment system and a technical mode [ J ]. Agricultural technology service, 2021, 38 (04): 55-56+ 59), and the systems have the problems of high cost, complex operation, secondary pollution and the like and are greatly limited in application.
A plurality of new pond culture systems appear in China, and the pond culture systems have the following types:
1. pond recirculating aquaculture system based on constructed wetland, as patent No.: cn202023283728.X granted publication No.: CN214015578U is named as a pond ecological green circulating culture system constructed based on an artificial wetland.
A container and ecological pond culture system and a green high-efficiency captive culture system, wherein the container and ecological pond culture system comprises: [1] chenjun. Pond captive green efficient mode heuristic [ J ] Jiangsu agricultural organisation, 2022 (01): 25-27.DOI.
3. The system comprises a plant floating bed-pond composite culture system, a flume-pond internal circulation culture system and a multi-nutrition-level comprehensive culture system, wherein the plant floating bed-pond composite culture system comprises: [1] maxue jian, liu da hai, huguo, jiang, livian, plum, liqing. Research on development and management application of multi-trophic-level comprehensive breeding mode [ J ] ocean development and management, 2016, 33 (04): 74-78. [2] Yang jin Ying, car Xuan. The technical key points of the multi-nutritional level pond culture system [ J ] scientific fish culture 2021 (12) are 16-17.DOI: CN202121644058.1 entitled publication: CN215012738U a multi-nutrient self-purification pond culture system).
Compared with the traditional culture pond, the three culture systems make certain progress in the aspects of culture object management and water quality purification. However, most of the existing fishpond culture areas cannot be taken out or are unwilling to take out a certain area of the fishpond as the actual situation of the tail water treatment site, and the above fishpond culture tail water purification systems occupy the culture area of the fishpond to a certain extent, so that an effective solution is not yet obtained on the problem of fishpond tail water treatment. In addition, when the irrigation and drainage river is in flood tide and in tide falling, a large amount of water is discharged and discharged, the water quality of the tail water of the fishpond is greatly influenced, and in the flood season, the water level of an external river is increased, the water cannot be changed by opening a gate, and the influence on the water quality of the tail water of most fishponds is worse.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention aims to: provides an ecological management method of a pond culture tail water drainage and irrigation river, which has low application cost and can stably discharge the drainage and irrigation river water quality reaching the standard.
In order to achieve the purpose, the invention adopts the following technical scheme:
an ecological management method for a pond culture tail water irrigation and drainage river comprises the following steps:
s1: arranging an ecological floating frame in the drainage and irrigation river;
s2: laying a float grass filler imitating biological contact oxidation area in a drainage and irrigation river, wherein the float grass filler imitating biological contact oxidation area is positioned in a river basin behind an ecological floating frame, so that pollutants are attached to the surface of the float grass filler imitating biological contact oxidation area;
s3: a plurality of aeration type oxygen increasing machines are arranged in the drainage and irrigation river, and the oxygen increasing machines are positioned in a river basin behind a biological contact oxidation area of the simulated aquatic weed fillers, so that the oxygen content of the river water is improved;
s4: an ecological floating island restoration area is arranged in the irrigation and drainage river and is positioned in a river basin behind the aerator;
s5: intermittently adding microbial strains into the drainage and irrigation river;
s6: taking the steps S1-S5 as a basic ecological management unit, and arranging at least one basic ecological management unit in the irrigation and drainage river;
s7: in the period of controlling the drainage and irrigation river, sampling and detecting water for many times every month, comparing the detected water quality index with a standard water quality index, and if the detected water quality index does not meet the standard, adjusting any one of the steps S1-S5 according to the detected overproof content element, or adjusting the steps S1-S5; if the detected water quality index reaches the standard water quality index, the river water in the drainage and irrigation river is discharged.
Preferably, in step S2, the aquatic weed-like filler biological contact oxidation area includes a plurality of aquatic weed-like fillers, the aquatic weed-like fillers are arranged into a plurality of filler rows, the plurality of filler rows are distributed at equal intervals, and the interval between two adjacent filler rows is 1m; the installation direction of each packing row is mutually perpendicular to the water flow direction, each packing row is fixed in a drainage and irrigation river by adopting bamboo poles and nylon ties, and each packing row enables the simulated aquatic weed packing to float on the water surface by connecting floating balls.
Preferably, the length of each filler row is 6m, the width of each simulated aquatic weed filler in each filler row is 1m, each simulated aquatic weed filler comprises a floating ball and a biological rope, one end of the biological rope is connected with the bamboo pole, and the other end of the biological rope is connected with the floating ball; the length of the biological rope is 100cm, and the diameter of the biological rope is 6cm.
Preferably, in step S4, the number of the ecological floating island restoration areas is several, the length of each ecological floating island is 50m, and the width of each ecological floating island is the same as the river width of the irrigation and drainage river.
Preferably, each ecological floating island restoration area comprises 12 ecological floating islands, and each ecological floating island is provided withArea of 8m 2 (ii) a Each ecological floating island is provided with an emergent aquatic plant planting area, a myriophyllum viridis planting area and an aquatic vegetable planting area.
Preferably, in the step S1, the ecological floating frame is formed by connecting PVC (polyvinyl chloride) line pipes with the diameter of 25mm and elbows, the PVC line pipes and the elbows are bonded through glue, nylon ropes and nylon nets are bound on the ecological floating frame to form a floating plant planting bed, and the planted floating plant varieties are watermifoil algae and aquatic vegetables.
Preferably, in the step S5, the microbial strains include nitrifying bacteria, bacillus, composite bacteria and phosphorus removing bacteria, and 1-time microbial strains are added every 6 days in the treatment period of the drainage and irrigation river, wherein the nitrifying bacteria, the bacillus and the composite bacteria are added according to the doses of 10mg/L, 10mg/L and 8mg/L respectively.
Preferably, in step S7, during the treatment period of the irrigation and drainage river, 6 times of water sampling detection per month are performed; the indexes of water body detection are COD, NH3-N, TP and TN contents.
In summary, the present invention has the following advantages:
1. the method of the invention has low cost, and the water inflow and the water drainage of the pond both use the rising tide and falling tide action of the irrigation and drainage river to complete the water inflow and water drainage process of the fish pond, so the irrigation and drainage river is the concentrated place for the tail water discharge of the fish pond culture.
2. In response to the problem that the river water level is increased outside the flood season in summer, the method can enable the aquaculture tail water in the fish pond and the river surge water of the irrigation and drainage river to form an internal circulation for treatment and utilization, firstly, the river surge water of the irrigation and drainage river reaches the aquaculture pond water inlet standard through artificial aeration and oxygenation in the irrigation and drainage river, microbial strains, aquatic plants and floating plants cultured on an ecological floating island and an ecological floating frame, and plant absorption effects of the emergent aquatic plants and the floating plants, the qualified river surge water of the irrigation and drainage river is pumped into the aquaculture pond for water change, the changed aquaculture pond tail water is purified by the facilities of the irrigation and drainage to reach the aquaculture pond water inlet standard, and the circulation is carried out, so that qualified aquaculture water can be changed in each aquaculture pond, and the tail water discharged by the aquaculture ponds is treated. The problem that the water quality of the fishpond can not be stably discharged up to the standard due to the fact that tail water of the fishpond can not be replaced by water in a drainage and irrigation river through rising tide and falling tide in a flood season can be solved; the method is superior to other physical and chemical methods for solving the problem of the water quality of the fishpond, reduces the cost for solving the water quality of the fishpond by the physical and chemical methods, and saves the treatment cost to a certain extent.
Drawings
FIG. 1 is a flow chart of an ecological management method of a pond culture tail water irrigation and drainage river.
FIG. 2 is a distribution diagram of a pond and a drainage and irrigation river in an ecological management method of a pond culture tail water drainage and irrigation river.
FIG. 3 shows the dynamic change of COD in the ecological management method of the tail water irrigation and drainage river of pond culture.
FIG. 4 is the dynamic change of NH3-N in the ecological management method of the tail water irrigation and drainage river of pond culture.
FIG. 5 shows the dynamic change of TP in the ecological management method of the tail water irrigation and drainage river of the pond culture.
FIG. 6 is the dynamic change of TN in the ecological management method of pond culture tail water irrigation and drainage rivers.
Wherein, 1 is a drainage and irrigation river, 2 is a pond, 3 is an ecological floating frame, 4 is an aquatic weed filler-imitating biological contact oxidation area, 5 is an aerator, and 6 is an ecological floating island repair area.
Detailed Description
The present invention will be described in further detail with reference to specific embodiments.
Example one
In the embodiment, 3 drainage and irrigation rivers with the total area of 20 mu are used as the operation field of the ecological management method of the pond culture tail water drainage and irrigation rivers. As shown in fig. 1-2.
The ecological management method for the pond culture tail water irrigation and drainage river comprises the following steps:
s1: arranging an ecological floating frame in the drainage and irrigation river;
s2: arranging a float grass filler imitating biological contact oxidation area in a drainage and irrigation river, wherein the float grass filler imitating biological contact oxidation area is positioned in a river basin behind an ecological floating frame, so that pollutants are attached to the surface of the float grass filler imitating;
s3: a plurality of aeration type oxygen increasing machines are arranged in the drainage and irrigation river, and the oxygen increasing machines are positioned in a river basin behind a biological contact oxidation area of the simulated aquatic weed fillers, so that the oxygen content of the river water is improved;
s4: an ecological floating island restoration area is arranged in the irrigation and drainage river and is positioned in a river basin behind the aerator;
s5: intermittently adding microbial strains into the drainage and irrigation river;
s6: taking the steps S1-S5 as a basic ecological management unit, and arranging at least one basic ecological management unit in the irrigation and drainage river;
s7: in the period of controlling the drainage and irrigation river, sampling and detecting water for many times every month, comparing the detected water quality index with a standard water quality index, and if the detected water quality index does not meet the standard, adjusting any one of the steps S1-S5 according to the detected overproof content element, or adjusting the steps S1-S5; if the detected water quality index reaches the standard water quality index, the river water in the drainage and irrigation river is discharged.
In this embodiment, each irrigation and drainage river is provided with two basic ecological management units, and in the two basic ecological management units, the ecological floating island restoration area of the basic ecological management unit located in the front river basin is adjacent to the ecological floating frame located in the rear river basin.
In the step S2, the aquatic weed filler imitating biological contact oxidation area comprises a plurality of aquatic weed filler imitating fillers, the aquatic weed filler imitating fillers are arranged into a plurality of filler rows, the filler rows are distributed at equal intervals, and the interval between every two adjacent filler rows is 1m; the installation direction of each packing row is mutually perpendicular to the water flow direction, each packing row is fixed in a drainage and irrigation river by adopting bamboo poles and nylon ties, and each packing row enables the simulated aquatic weed packing to float on the water surface by connecting floating balls. Each filling row is 6m in length, each width of the simulated aquatic weed filling in each filling row is 1m, each simulated aquatic weed filling comprises a floating ball and a biological rope, one end of the biological rope is connected with the bamboo pole, and the other end of the biological rope is connected with the floating ball; the length of the biological rope is 100cm, and the diameter of the biological rope is 6cm.
In the embodiment, the waterweed-imitating filler can enable pollutants to be attached to the surface of the filler, so that the retention time is long, and by means of dissolved oxygen contained in fishpond tail water, atmospheric reoxygenation of ditch water and oxygen excretion of algae photosynthesis, efficient microorganisms added into a ditch can be attached to the waterweed-imitating filler and the surface of a root system of an aquatic plant, and the fishpond tail water discharged into the ditch is biodegraded, so that water quality indexes such as COD (chemical oxygen demand), ammonia nitrogen, total phosphorus and the like in the pond culture tail water are improved to a certain extent.
In the step S4, in 3 drainage and irrigation rivers, the number of the ecological floating island restoration areas is a plurality, the length of each ecological floating island is 50m, and the width of each ecological floating island is the same as the river width of the drainage and irrigation river. The total area of each ecological floating island restoration area is 300m calculated according to 6m 2 Total 900m 2 。
Each ecological floating island restoration area comprises 12 ecological floating islands, and the area of each ecological floating island is 8m 2 (ii) a Each ecological floating island is provided with an emergent aquatic plant planting area, a myriophyllum viridis planting area and an aquatic vegetable planting area. Wherein canna, iris, saxifrage, windmill grass and the like are planted in the emergent aquatic plant planting area; planting foxtail in the foxtail green algae planting area, planting water spinach, water celery and watercress in the aquatic vegetable planting area, and planting according to different time periods. The total area of the ecological floating island of the first irrigation and drainage river is 288m 2 . The key point of the ecological floating island is that by utilizing the biological pollution control principle, the floating island vegetation selects hydroponic land plants or aquatic plants with high nutrition absorption rate, the plant roots absorb nutrients in water, and a large number of microorganisms are attached to plant roots to form a biological film. Pollutants are removed through the growth and purification effects of higher aquatic plants, and the growth of blue-green algae in water is controlled through the shading effect, so that the generation of water bloom is avoided. By configuring plants with rich landscape effect, beautiful ecological waterscape is created.
In 3 drainage and irrigation rivers, the number of the ecological floating frames is a plurality,a plurality of ecological floating frames form a plurality of ecological floating frame restoration areas, the length of each ecological floating frame restoration area is 50m, the width is river width, and the total area of each ecological floating frame restoration area is 400m calculated according to 8m 2 Total 1200m 2 . The myriophyllum viridis floating plants, aquatic vegetables and the like are widely applied to water environment restoration, including engineering of river black and odorous water body treatment, pig raising wastewater treatment, fishpond culture tail water ecological restoration and the like. An ecological restoration area of the myriophyllum viridis and the aquatic vegetables is arranged behind the ecological floating island restoration area, and the purification treatment of the myriophyllum viridis and the aquatic vegetables on the fishpond cultivation tail water discharged into the drainage and irrigation river is strengthened.
In the step S1, the ecological floating frame is formed by connecting a PVC (polyvinyl chloride) line pipe with the diameter of 25mm and an elbow, the PVC line pipe and the elbow are bonded through glue, a nylon rope and a nylon net are bound on the ecological floating frame to form a floating plant planting bed, and planted floating plant varieties are myriophyllum and aquatic vegetables.
In the step S5, the microbial strains comprise nitrobacteria, bacillus, composite bacteria and phosphorus-removing bacteria, in the period of treatment of the drainage and irrigation river, the ecological treatment time is two months, in the period of 2 months of ecological treatment, the microbial strains are added 5 times per month and 1 time per 6 days, and the nitrobacteria, the bacillus and the composite bacteria are added according to the dosages of 10mg/L, 10mg/L and 8mg/L respectively. So that the wastewater can propagate in eutrophic river water in a large amount and slowly decompose organic pollutants such as COD, ammonia nitrogen, total phosphorus and the like in the river water. The total adding time is 10 times in the ecological treatment period (total 2 months). The amount of nitrobacteria, bacillus and composite strains is 1600.8Kg =13340m 2 X 1.2 m.times.10 mg/L.times.10 times; the number of photosynthetic bacteria is 1280.6Kg =13340m 2 X 1.2 m.times.8 mg/L.times.10 times; in total: 6083Kg =1600.8Kg x 3+1280.6Kg.
In the step S7, water sampling detection is carried out for 6 times per month in the period of irrigation and drainage river control; the indexes of the water body detection are COD (chemical oxygen demand), NH3-N (ammonia nitrogen), TP (total phosphorus) and TN (total nitrogen) contents. COD and NH of fishpond tail water treated by the system 3 The contents of-N, TP and TN are reduced, and the quality of the discharged tail water is improved in the sixth and seventh samplingCan basically reach the expected water quality index (COD)<40mg/L、NH 3 -N<1.5mg/L、TP<0.3mg/L、TN<3.0 mg/L) (see FIGS. 3-6, for details). The water body detection equipment comprises a total nitrogen analyzer, a nitrate nitrogen analyzer, an ammonia nitrogen analyzer, a total phosphorus analyzer and a chemical oxygen demand analyzer. And using a corresponding instrument according to the index to be detected.
The specific process comprises the following steps:
1. aiming at the region with the natural phenomenon of tide rise and fall, when the drainage and irrigation river falls into tide and is tail water discharged from a fishpond, the content of ammonia nitrogen, nitrite, COD and the like in a water body is high when a large amount of tail water is discharged, at the moment, an artificial oxygen aeration machine is opened, strains (nitrobacteria, bacillus, composite bacteria, phosphorus removing bacteria, CEM bacteria and the like) are added at the same time, the tail water discharged from the fishpond and entering a river channel is subjected to rapid aeration enhanced biological treatment for 4-6 hours by simulating the biological contact oxidation of aquatic weed fillers, and meanwhile, aquatic plants are cultivated by an ecological floating island and an ecological floating frame to absorb nitrogen and phosphorus nutrients in the water of the drainage and irrigation river, so that the water quality of the fishpond discharged into the drainage and irrigation river is greatly improved, and even is discharged out of the drainage and irrigation river after reaching the standard.
2. Aiming at the area with the natural phenomenon of tide rise and fall, when the drainage and irrigation river rises tide, the tail water discharged by the aquaculture pond which is not treated completely during the tide fall enters the drainage and irrigation river along with the rising tide water, and if the aquaculture pond enters water at the moment, the quality of the inlet water is polluted. Therefore, at the moment, the artificial oxygen aeration machine is required to be opened, microbial strains are added at the same time, the tail water discharged from the fish pond and entering the river is rapidly aerated and biologically treated for 2 to 4 hours by the biological contact oxidation of the waterweed-simulating filler, and meanwhile, the nitrogen and phosphorus nutrients in the irrigation river water are absorbed by the aquatic plants cultivated by the ecological floating island and the ecological floating frame, so that the poor irrigation water quality of the drainage canal and the river driven by the rising water in the rising tide can be purified and improved.
3. Aiming at the area with the natural phenomenon of tide rise and fall, because the aquaculture pond only carries out irrigation when the tide rises in the daytime and carries out drainage when the tide falls in the daytime, the 1 and 2 conditions only start rapid aeration strengthening biological treatment when the tide rises and falls in the daytime, and are in a closed state when the tide rises and falls in the nighttime, but microorganisms attached to the water-imitation grass filler can carry out biodegradation on pollutants in the irrigation and drainage river by means of dissolved oxygen in the irrigation and drainage river water, and emergent aquatic plants and floating plants planted on the ecological floating island and the ecological floating frame can absorb nitrogen and phosphorus nutrients in the irrigation and drainage river water, so that the water quality of the irrigation and drainage is improved.
4. Aiming at the problem that a fish pond cannot change water and discharge water through the tide rise and the tide fall gate opening due to overhigh river water line outside a flood season in summer, the method comprises the steps of carrying out artificial aeration oxygenation on the rainfall flood runoff accumulated in the drainage canal river and adding microbial strains when the water change is needed in the aquaculture pond (but water change is not available under normal conditions) within the flood season of 6-8 months, carrying out rapid enhanced biological treatment on the drainage and irrigation river water for 24-48 hours by using aquatic plant and floating plant which are planted in an ecological floating island and an ecological floating frame to absorb nitrogen and phosphorus, and pumping the drainage and irrigation river water into the aquaculture pond as irrigation water when the drainage and irrigation river water meets the water quality requirement of the aquaculture pond, and simultaneously discharging the tail water of the aquaculture pond into the drainage and irrigation pond to carry out rapid enhanced biological treatment, wherein the tail water of the aquaculture pond circulates in such a way until all the tail water of the aquaculture pond is discharged into the drainage and irrigated by the drainage river to achieve the standard.
Example two
In this embodiment, the specific process is as follows: aiming at non-fluctuating riverways, such as tail water of inland culture ponds, the tail water of the river can also be subjected to the river drainage in-situ ecological restoration technology, a water pump is used for pumping water from the river drainage to the fish pond, tail water of three fish ponds is discharged to the river drainage, an artificial oxygen aeration machine is opened at the moment, strains (nitrobacteria, bacillus, composite bacteria, phosphorus removing bacteria, CEM bacteria and the like) are added at the same time, the aquatic plants are cultured by virtue of the ecological floating island and the ecological floating frame to absorb nitrogen and phosphorus nutrients in the water of the river drainage, the water quality of the fish pond discharged into the river drainage is greatly improved, and then the fish pond is pumped back, so that water purification circulation is realized.
The embodiment is not described in the first embodiment.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such modifications are intended to be included in the scope of the present invention.
Claims (8)
1. An ecological management method for a pond culture tail water irrigation and drainage river is characterized by comprising the following steps:
s1: arranging an ecological floating frame in the drainage and irrigation river;
s2: laying a float grass filler imitating biological contact oxidation area in a drainage and irrigation river, wherein the float grass filler imitating biological contact oxidation area is positioned in a river basin behind an ecological floating frame, so that pollutants are attached to the surface of the float grass filler imitating biological contact oxidation area;
s3: a plurality of aeration type oxygen-increasing machines are arranged in the drainage and irrigation river, and the oxygen-increasing machines are positioned in a river basin behind a biological contact oxidation area of the simulated aquatic weed fillers, so that the oxygen content of the river water is improved;
s4: an ecological floating island restoration area is arranged in the drainage and irrigation river and is positioned in a river basin behind the aerator;
s5: intermittently adding microbial strains into the drainage and irrigation river;
s6: taking the steps S1-S5 as a basic ecological management unit, and arranging at least one basic ecological management unit in the drainage and irrigation river;
s7: in the period of controlling the drainage and irrigation river, sampling and detecting water for many times every month, comparing the detected water quality index with a standard water quality index, and if the detected water quality index does not meet the standard, adjusting any one of the steps S1-S5 according to the detected overproof content element, or adjusting the steps S1-S5; if the detected water quality index reaches the standard water quality index, the river water in the drainage and irrigation river is discharged.
2. The ecological management method for the pond culture tail water irrigation and drainage river according to claim 1, characterized in that: in the step S2, the aquatic weed filler imitating biological contact oxidation area comprises a plurality of aquatic weed filler imitating fillers, the aquatic weed filler imitating fillers are arranged into a plurality of filler rows, the filler rows are distributed at equal intervals, and the interval between every two adjacent filler rows is 1m; the installation direction of each filler row is vertical to the water flow direction, each filler row is fixed in a drainage and irrigation river by adopting bamboo poles and nylon ties, and each filler row enables the simulated aquatic weed filler to float on the water surface by connecting floating balls.
3. The ecological management method for the tail water drainage and irrigation river of the pond culture according to claim 2, characterized in that: each filling row is 6m in length, each width of the simulated aquatic weed filling in each filling row is 1m, each simulated aquatic weed filling comprises a floating ball and a biological rope, one end of the biological rope is connected with the bamboo pole, and the other end of the biological rope is connected with the floating ball; the length of the biological rope is 100cm, and the diameter of the biological rope is 6cm.
4. The ecological management method for the pond culture tail water irrigation and drainage river according to claim 1, characterized in that: in the step S4, the number of the ecological floating island restoration areas is a plurality, the length of each ecological floating island is 50m, and the width of each ecological floating island is the same as the river width of the irrigation and drainage river.
5. The ecological management method for the pond culture tail water irrigation and drainage river according to claim 4, characterized in that: each ecological floating island restoration area comprises 12 ecological floating islands, and the area of each ecological floating island is 8m 2 (ii) a Each ecological floating island is provided with an emergent aquatic plant planting area, a myriophyllum viridis planting area and an aquatic vegetable planting area.
6. The ecological management method for the pond culture tail water irrigation and drainage river according to claim 1, characterized in that: in the step S1, the ecological floating frame is formed by connecting PVC line pipes with the diameter of 25mm and elbows, the PVC line pipes and the elbows are bonded through glue, nylon ropes and nylon nets are bound on the ecological floating frame to form a floating plant planting bed, and the planted floating plants are watermifoil and aquatic vegetables.
7. The ecological management method for the pond culture tail water irrigation and drainage river according to claim 1, characterized in that: in the step S5, the microbial strains comprise nitrobacteria, bacillus, composite bacteria and phosphorus-removing bacteria, and in the period of controlling the drainage and irrigation river, 1 time of microbial strains are added every 6 days, and the nitrobacteria, the bacillus, the composite bacteria and the phosphorus-removing bacteria are respectively added according to the dosages of 10mg/L, 10mg/L and 8mg/L each time.
8. The ecological management method for the pond culture tail water irrigation and drainage river according to claim 1, characterized in that: in the step S7, in the period of controlling the drainage and irrigation river, 6 times of water sampling detection are carried out every month; the indexes of water body detection are COD, NH3-N, TP and TN contents.
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