CN109874442B - Irrigation and drainage system for field in-situ ecological circulating water treatment - Google Patents

Irrigation and drainage system for field in-situ ecological circulating water treatment Download PDF

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CN109874442B
CN109874442B CN201910276278.4A CN201910276278A CN109874442B CN 109874442 B CN109874442 B CN 109874442B CN 201910276278 A CN201910276278 A CN 201910276278A CN 109874442 B CN109874442 B CN 109874442B
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ecological interception
planting
water source
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CN109874442A (en
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陈丹艳
冯渊圆
姚从彬
沈珊珊
张爱慧
陆海鹰
刘钰
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Jinling Institute of Technology
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Abstract

The invention discloses a field in-situ ecological circulating water treatment irrigation and drainage system, which comprises a planting area, an underground physical purification area, an ecological interception area I, an ecological interception area II, an ecological interception area III, a biological film-ceramsite purification area, a clean water source storage area, a culture area and a irrigation system; the planting area is a slope, and the middle part is divided into an upper planting area and a lower planting area through an underground physical purification area; the ecological interception area I is a ditch paved along the slope bottom of the planting area, a water diversion port at one end of the ditch is connected with a foreign water source, and the other end of the ditch is communicated with the ecological interception area III; the ecological interception area II is an outward inclined soil slope positioned on the other side of the ecological interception area I, and a water collecting channel is formed at the bottom and is communicated with the ecological interception area III; the clean water source storage area is positioned at one side of the planting area; the biological membrane-ceramsite purifying area is positioned between the ecological interception III area and the clean water source storing area; the irrigation system is communicated with the clean water source storage area and the planting area through pipelines, and irrigates the water source in the clean water source storage area into the planting area.

Description

Irrigation and drainage system for field in-situ ecological circulating water treatment
Technical Field
The invention belongs to the fields of farmland ecological cycle engineering, in-situ non-point source pollution control, efficient water resource utilization, protection and the like, and particularly relates to a field in-situ ecological cycle water treatment irrigation and drainage system.
Background
Soil heavy metal pollution and water eutrophication in agricultural production in China and organic pollution are serious. There are areas where there is no good soil that can be used to produce crops. Aiming at the environmental problems, domestic and foreign specialists research by various means, and gradually implement effective achievements, thereby obtaining certain effects. The technology of 4R is provided for farmland non-point source pollution, and good treatment effect is achieved when the technology is used in a large-area agricultural non-point source pollution area. And is being advanced on a large scale across the country. Because the technology uses an ecological means, the treatment time is long, and the effect on the severe pollution areas cannot be realized quickly. Other places begin to be controlled by plant engineering and microorganisms, and the plant-controlled microbial fertilizer has certain effect. Although the traditional foreign soil replacement can solve the problem of polluted soil to a great extent, the traditional foreign soil replacement is not suitable under the condition that pollution-free soil resources available in China are less and less. And the means such as leaching and distilling the heavy metal polluted soil are also high in cost. In-situ soil and water pollution treatment is also studied in a large amount, such as by using some modifiers, special fertilizers, microorganisms and the like, but various means have different treatment effects, and particularly, the method is difficult to effectively solve in a simple method for different soil types and geographical positions. However, most measures do not consider the treatment and utilization of the locally polluted groundwater, and the recurrence of the later pollution phenomenon is caused. Groundwater pollution detection and treatment are indistinct.
At present, farmland non-point source pollution treatment is mainly concentrated in large-scale planting areas, and no corresponding complete ecological recycling treatment system exists for small-scale agricultural production bases. Especially for the facility agriculture generation area, soil problems such as salt accumulation, nutrient loss and heavy metal pollution are generated for a long time, and meanwhile, agricultural wastes are not reasonably utilized, so that the improvement and prevention measures of the problems cannot be organically combined, the waste of resources is caused, and the treatment cost is high. And soil problems are not fundamentally utilized.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the irrigation and drainage system for effectively treating the non-point source pollution, the heavy metal pollution and the organic matter pollution in the agricultural production, thereby realizing the efficient purification treatment and the recycling of the field in-situ water.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
an in-situ ecological circulating water treatment irrigation and drainage system for a field comprises a planting area, an underground physical purification area, an ecological interception area I, an ecological interception area II, an ecological interception area III, a biological membrane-ceramsite purification area, a clean water source storage area, a culture area and a irrigation system;
the planting area is a slope with the gradient of 0.2-0.4, and the middle part is divided into an upper planting area and a lower planting area through an underground physical purification area; the upper planting area is surrounded by a ridge, and the lower planting area is surrounded by an underground physical purification area;
the ecological interception area I is a ditch paved along the slope bottom of the planting area, one end of the ditch is connected with an external water source, and the other end of the ditch is communicated with the ecological interception area III through a first reserved opening on the side surface of the ecological interception area III, so that the external water source is introduced into the ecological interception area III;
the ecological interception area II is an outward inclined soil slope positioned at the other side of the ecological interception area I, a water collecting channel is formed at the bottom of the ecological interception area II, the end part of the ecological interception area II is communicated with the ecological interception area III through a second reserved opening at the side surface of the ecological interception area III, and water in the water collecting channel is introduced into the ecological interception area III; the method comprises the steps of carrying out a first treatment on the surface of the
The clean water source storage area is positioned at one side of the planting area and is used for storing clean irrigation water sources, and a ceiling is arranged above the clean water source storage area to isolate external pollutants;
the biological film-ceramsite purifying area is positioned between the ecological interception III area and the clean water source storing area; the water in the ecological interception III area is introduced into a biological film-ceramsite purifying area for further treatment through a first rolling dam at one side of the ecological interception III area, and then enters a clean water source storage area for storage through a second rolling dam at one side of the biological film-ceramsite purifying area;
the culture area is closely adjacent to the clean water source storage area and the planting area and is used for culturing microorganisms and aquatic plants;
the irrigation system is communicated with the clean water source storage area and the planting area through pipelines, and irrigates the water source in the clean water source storage area into the planting area.
Specifically, the upper planting area and the lower planting area are respectively divided into a plurality of planting fields by straw ridges; the straw ridge is formed by mixing crop straw and soil.
The underground physical purification zone consists of an upper soil layer, a middle filter layer and a bottom purification layer; the thickness of the upper soil layer is 20-40cm; the middle filter layer is formed by mixing soil, stone blocks and fine sand, and the thickness of the middle filter layer is not less than 40cm; the bottom purification layer is formed by mixing soil, cobblestones, biomass powder and ceramsite, and the thickness is not less than 40cm.
The depth of the ecological interception area I is not more than 0.5m, the bottom of the ecological interception area I is 0.5-0.1m higher than that of the ecological interception area III, aquatic purified plants are planted in the canal, and small aquatic animals are cultivated.
Aquatic crops are planted on the slope of the ecological interception area II.
The depth of the ecological interception III area is not more than 1.0m, the bottom is provided with a zeolite-cobble layer, the thickness of the layer is not more than half of the depth of the ecological interception III area, and purified phytoplankton are planted.
The depth of the biological film-ceramsite purifying area is not more than 0.5m, the bottom ceramsite layer is not more than 0.4cm, and microorganisms in a local water source are added to form the biological film.
The depth of the clean water source storage area is 0.5-2m, a water diversion platform is arranged on one side of the clean water source storage area adjacent to the planting area, and a tap water supplementing pipeline is arranged on the other side of the clean water source storage area.
The irrigation system comprises a water pump, a main water delivery pipeline and a field branch pipe, wherein the water pump is positioned on the water diversion platform, the main water delivery pipeline is paved between an upper planting area and a lower planting area, and water in a clean water source storage area is pumped to various planting fields for irrigation through the field branch pipe.
The beneficial effects are that:
the invention uses multi-layer, multi-process and multi-space ecological purification and seepage water, the purified water is recycled into crop production, meanwhile, certain economic and ecological benefits can be obtained in different ecological purification areas, the loss of soil nutrients is reduced, crop straws are fully utilized, not only can the evaporation of water be reduced, but also organic substances can be formed through decomposition for a certain period to be directly used in planting areas. Therefore, the invention can well realize the ecological water circulation function of farmland, can also create economic value, reduce running cost, reduce crop growth barrier and recycle waste.
Drawings
The foregoing and/or other advantages of the invention will become more apparent from the following detailed description of the invention when taken in conjunction with the accompanying drawings and detailed description.
Fig. 1 is a schematic diagram of the overall structure of the irrigation and drainage system.
Fig. 2 is an irrigation schematic diagram of the irrigation and drainage system.
FIG. 3 is a cloth layer diagram of the underground physical purification area of the irrigation and drainage system.
Fig. 4 is a schematic diagram of water flow circulation storage of the irrigation and drainage system.
Detailed Description
The invention will be better understood from the following examples.
The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the disclosure of the present invention, and are not intended to limit the scope of the invention, which is defined by the claims, but rather by the terms of modification, variation of proportions, or adjustment of sizes, without affecting the efficacy or achievement of the present invention, should be understood as falling within the scope of the present invention. Also, the terms such as "upper", "lower", "front", "rear", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the invention for which the invention may be practiced or for which the relative relationships may be altered or modified without materially altering the technical context.
As shown in figure 1, the irrigation and drainage system comprises a planting area 1, an underground physical purification area 2, an ecological interception area I3, an ecological interception area II 4, an ecological interception area III 5, a biological membrane-ceramsite purification area 6, a clean water source storage area 7, a culture area 8 and an irrigation system 9.
The planting area 1 is a slope, the gradient is 0.3, and the middle part is divided into an upper planting area 101 and a lower planting area 102 through an underground physical purification area 2; the upper planting area 101 is surrounded by a ridge 13, and the lower planting area 102 is surrounded by an underground physical purification area 2; the upper planting area 101 and the lower planting area 102 are separated into a plurality of planting fields by straw ridges 14, respectively.
The underground physical purification zone 2 consists of an upper soil layer 21, a middle filter layer 22 and a bottom purification layer 23; the thickness of the upper soil layer 21 is 30cm; the middle filter layer 22 is formed by mixing soil, stone and fine sand, and has a thickness of 40cm; the bottom purification layer 23 is formed by mixing soil, cobblestones, biomass powder and ceramsite, and has a thickness of 40cm.
The ecological interception zone I3 is a ditch paved along the slope bottom of the planting zone 1, one end of the ditch is connected with an external water source through a water diversion port 31, and the other end of the ditch is communicated with the ecological interception zone III 5 through a first reserved port 51 on the side surface of the ecological interception zone III 5, so that the external water source is introduced into the ecological interception zone III 5. The depth of the ecological interception I area 3 is 0.5m, the bottom is about 0.3m higher than the ecological interception III area 5, aquatic purified plants are planted in the canal, and small aquatic animals are cultivated.
The ecological interception II area 4 is an outward inclined soil slope positioned on the other side of the ecological interception I area 3, aquatic crops are planted on the slope, a water collecting channel is formed at the bottom of the ecological interception II area, the end part of the ecological interception II area is communicated with the ecological interception III area 5 through a second reserved opening 52 on the side surface of the ecological interception III area 5, and water in the water collecting channel is introduced into the ecological interception III area 5.
The depth of the ecological interception III area 5 is 1.0m, the bottom is provided with a zeolite-cobble layer, the layer thickness is not more than half of the depth of the ecological interception III area, and purified phytoplankton are planted.
The clean water source storage area 7 is positioned at one side of the planting area 1, the depth is 1m, a water diversion platform 10 is arranged at one side of the clean water source storage area adjacent to the planting area 1, and a tap water supplementing pipeline 11 is arranged at the other side of the clean water source storage area. The clean water source storage area 7 is used for storing clean irrigation water sources, and a ceiling is arranged above the clean water source storage area to isolate external pollutants.
The biological film-ceramsite purifying area 6 is positioned between the ecological interception III area 5 and the clean water source storing area 7; the ecological interception III area 5 introduces the water in the ecological interception III area 5 into the biological film-ceramsite purifying area 6 for further treatment through a first rolling dam 53 at one side, and then enters the clean water source storage area 7 for storage through a second rolling dam 61 at one side of the biological film-ceramsite purifying area 6. The depth of the biological film-ceramsite purifying area 6 is 0.5m, the bottom ceramsite layer is not more than 0.4cm, and microorganisms in a local water source are added to form the biological film.
The culture area 8 is adjacent to the clean water source storage area 7 and the planting area 1 and is used for culturing microorganisms and aquatic plants.
The irrigation system 9 is communicated with the clean water source storage area 7 and the planting area 1 through pipelines, and irrigates the water source in the clean water source storage area 7 into the planting area 1. The irrigation system 9 comprises a water pump 91, a main water delivery pipeline 92 and a field branch pipe 93, wherein the water pump 91 is positioned on the water diversion platform 10, the main water delivery pipeline 92 is paved between an upper planting area 101 and a lower planting area 102, and water in the clean water source storage area 7 is pumped to various planting fields for irrigation through the field branch pipe 93.
The construction flow of the irrigation and drainage system comprises the following steps:
(1) Construction of hardened region
In the construction process of the invention, firstly, the ecological interception III area 5, the biological film-ceramsite purifying area 6, the clean water source storing area 7 and the culturing area 8 are subjected to hardening construction.
The two independent sides of the ecological interception III area 5 are provided with impermeable layers, and the other side is communicated with the biological film-ceramsite purifying area 6 through a first rolling dam 51. The periphery is subjected to impermeable hardening treatment, a zeolite-cobble layer is arranged in the periphery, the thickness of the layer is not more than half of the depth of the area, and phytoplankton is planted and purified.
The biological film-ceramsite purifying area 6 is divided into an ecological interception III area 5 and a clean water source storing area 7, the bottom ceramsite layer is not more than 0.4cm, and microorganisms in a local water source are added to form the biological film.
The wall around the clean water source storage area 7 is provided with an impermeable layer, one side shared with the biological film-ceramsite purification area 6 is provided with a second rolling dam 61, one side adjacent to the planting area is provided with a water diversion table 10, and the opposite side is provided with a tap water supplementing pipeline 11.
(2) Construction of underground physical purification area
Consists of an upper soil layer, middle soil, stone blocks, fine sand, lower soil, cobbles, biomass powder and ceramsite. The soil layer thickness is 20-40cm, the soil, stone, fine sand layer thickness is not less than 40cm, the soil, cobblestone, biomass powder and ceramsite layer thickness is not less than 40cm, and the effect is good.
(3) Irrigation system arrangement
The irrigation system comprises a water pump, a main water delivery pipeline and a field branch pipe water intake, wherein the water pump is arranged on the water drinking table. And paving a main water delivery pipeline in the construction process of the underground physical purification area, and selecting an ageing-resistant and compression-resistant plastic pipe with the pipe diameter not smaller than 50cm. The diameter of the water intake pipe of the extracted field is smaller than that of the main pipe, and the water intake pipe is provided with a control valve as the water intake of each field.
(4) Construction of planting area
The method is mainly characterized in that land leveling is carried out according to the condition that the optimal gradient is 0.2-0.4 and the optimal inclination angle is 10-30 degrees, each planting area on the high side of the planting area is formed by enclosing a ridge, a straw ridge and a physical purification layer, each planting area on the low side of the planting area is only isolated by the straw ridge, and the rest of the periphery is formed by enclosing a physical evolution layer. Straw ridges are arranged in the field of the planting area, and the thickness is set according to biomass of the planting area and is generally not less than 5cm. The ridge is formed by mixing crushed crop stubbles or straws with soil, and adding beneficial microorganism EM for in-situ fermentation.
(4) Ecological interception zone I and ecological interception zone II
The ecological interception area I is a soil ditch dug on the original soil, the depth is less than 0.5m, the bottom is 0.5-0.1m higher than the ecological interception area III, and the ecological interception area I is separated from an underground physical purification area by a soil ridge with the width of at least 40cm. Planting aquatic purified plants with economic value and cultivating small aquatic animals, and forming a biological film from organisms by utilizing local circumference; meanwhile, one end is connected with a foreign water source, and the other end is directly communicated with the ecological interception III area.
The ecological interception area II is an inclined soil slope with the width not less than 1m, plants with purification function are planted on the slope, a water collecting channel is formed at the bottom of the slope and is communicated with the ecological interception area III, water in the water collecting channel is introduced into the ecological interception area III, and seepage prevention treatment should be carried out on one side far away from the ecological interception area I.
The water treatment and circulation purification process of the irrigation and drainage system is as follows:
irrigation is carried out in the growth process of crops, and water seepage enters an underground physical purification area, so that nutrient loss is prevented. When the underground water level rises, the water level passes through an underground physical purification area, biomass charcoal, ceramsite and the like absorb and block accumulation of salt, and meanwhile, retained nutrients are provided for crops according to needs, so that crop growth nutrient management is needed according to local actual conditions, excessive application cannot be performed, and the condition that the nutrients of the previous crop are retained in the next crop growth process can be considered for weight losing application.
The water flows into the ecological interception I area and the ecological interception II area in the infiltration process, is further absorbed and purified by plants and biological membranes, flows into the ecological interception III area, and pollutants or surplus nutrients in the water are further absorbed by phytoplankton and microorganisms generated around zeolite and goose soft stones. Meanwhile, the area can reduce the water flow speed, prolong the absorption and purification time, slowly enter the biomembrane-ceramsite purification area to be further purified, finally enter the clean water source storage area, and can be recycled for irrigation, so that the area water treatment and recycling are realized.
All used biological films and plants can be cultivated in the cultivation area in advance, the cultivation of the secondary organisms, the cultivation of the plants and the like are facilitated, the cost is reduced, and the construction and the later water treatment are facilitated.
The invention has certain effects on non-point source pollution, heavy metal pollution and organic matter pollution in agricultural production. Especially for heavily polluted areas, the purification can be realized initially after one year, and green pollution-free agricultural products can be produced in the next year. Meanwhile, the invention can obtain various economic values, reduce the cost and realize certain economic benefits.
The invention provides a thought and a method for a field in-situ ecological circulating water treatment irrigation and drainage system, and the method and the way for realizing the technical scheme are numerous, the above is only a preferred embodiment of the invention, and it should be pointed out that a plurality of improvements and modifications can be made to a person of ordinary skill in the art without departing from the principle of the invention, and the improvements and the modifications are also regarded as the protection scope of the invention. The components not explicitly described in this embodiment can be implemented by using the prior art.

Claims (4)

1. The field in-situ ecological circulating water treatment irrigation and drainage system is characterized by comprising a planting area (1), an underground physical purification area (2), an ecological interception area I (3), an ecological interception area II (4), an ecological interception area III (5), a biological membrane-ceramsite purification area (6), a clean water source storage area (7), a culture area (8) and an irrigation system (9);
the planting area (1) is a slope, the gradient is 0.2-0.4, and the middle part is divided into an upper planting area (101) and a lower planting area (102) through an underground physical purification area (2); the upper planting area (101) is surrounded by a ridge (13), and the lower planting area (102) is surrounded by an underground physical purification area (2);
the ecological interception area I (3) is a ditch paved along the slope bottom of the planting area (1), one end of the ditch is connected with an external water source through a water diversion port (31), and the other end of the ditch is communicated with the ecological interception area III (5) through a first reserved port (51) on the side surface of the ecological interception area III (5), so that the external water source is introduced into the ecological interception area III (5);
the ecological interception II area (4) is an outward inclined soil slope positioned at the other side of the ecological interception I area (3), a water collecting channel is formed at the bottom of the ecological interception II area, the end part of the ecological interception II area is communicated with the ecological interception III area (5) through a second reserved opening (52) at the side surface of the ecological interception III area (5), and water in the water collecting channel is introduced into the ecological interception III area (5);
the clean water source storage area (7) is positioned at one side of the planting area (1) and is used for storing a clean irrigation water source, and a ceiling is arranged above the clean water source storage area to isolate external pollutants;
the biological film-ceramsite purifying area (6) is positioned between the ecological interception III area (5) and the clean water source storing area (7); the ecological interception III area (5) introduces water in the ecological interception III area (5) into the biological film-ceramsite purifying area (6) for further treatment through a first rolling dam (53) at one side, and then enters a clean water source storage area (7) for storage through a second rolling dam (61) at one side of the biological film-ceramsite purifying area (6);
the culture area (8) is closely adjacent to the clean water source storage area (7) and the planting area (1) and is used for culturing microorganisms and aquatic plants;
the irrigation system (9) is communicated with the clean water source storage area (7) and the planting area (1) through a pipeline, and water sources in the clean water source storage area (7) are irrigated in the planting area (1);
the upper planting area (101) and the lower planting area (102) are respectively divided into a plurality of planting fields by straw ridges (14); the straw ridge is formed by mixing crop straw and soil;
the underground physical purification zone (2) consists of an upper soil layer (21), a middle filter layer (22) and a bottom purification layer (23); the thickness of the upper soil layer (21) is 20-40cm; the middle filter layer (22) is formed by mixing soil, stone and fine sand, and the thickness is not less than 40cm; the bottom purification layer (23) is formed by mixing soil, cobblestones, biomass powder and ceramsite, and the thickness is not less than 40cm;
the depth of the biological film-ceramsite purifying area (6) is not more than 0.5m, the bottom ceramsite layer is not more than 0.4cm, and microorganisms in a local water source are added to form a biological film;
the depth of the clean water source storage area (7) is 0.5-2m, a water diversion table (10) is arranged on one side of the clean water source storage area adjacent to the planting area (1), and a tap water supplementing pipeline (11) is arranged on the other side of the clean water source storage area;
the irrigation system (9) comprises a water pump (91), a main water delivery pipeline (92) and a field branch pipe (93), wherein the water pump (91) is positioned on the diversion platform (10), the main water delivery pipeline (92) is paved between an upper planting area (101) and a lower planting area (102), and water in the clean water source storage area (7) is pumped to various planting fields for irrigation through the field branch pipe (93).
2. The in-situ ecological circulating water treatment irrigation and drainage system of claim 1, wherein the depth of the ecological interception area I (3) is not more than 0.5m, the bottom is 0.5-0.1m higher than the ecological interception area III (5), aquatic purified plants are planted in the canal, and small aquatic animals are cultivated.
3. The in-situ ecological circulating water treatment irrigation and drainage system of claim 1, wherein aquatic crops are planted on the slope of the ecological interception area II (4).
4. The in-situ ecological circulating water treatment irrigation and drainage system of claim 1, wherein the depth of the ecological interception area III (5) is not more than 1.0m, a zeolite-cobble layer is arranged at the bottom, the layer thickness is not more than half of the depth of the ecological interception area III, and purified phytoplankton is planted.
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