Ecological system for treating distributed small fishpond wastewater
By setting up ecological purification ditches and ponds in fish ponds, and using composite filter dams and water-punching plant purification zones to treat wastewater, the problem of high wastewater treatment in small fish ponds is solved, low-cost and efficient pollutant removal is achieved, and economic value is generated.
Patent Information
- Application Number
- CN202421173563.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-28
- Publication Date
- 2025-05-06
- Estimated Expiration
- 2034-05-28
AI Technical Summary
The wastewater treatment cost of decentralized small fish ponds is high, and the existing technology is difficult to effectively solve, and the land occupies and costs are high.
An ecological system is designed, including an ecological purification ditches and an ecological purification pond. By setting up a composite filter dam and an ecological purification pond in the fish pond, the wastewater is initially and deeply purified by using a multi-stage composite filter dam and a water-propelled plant purification area, and then flow back to the fish pond.
It has achieved effective removal of nitrogen, phosphorus and organic matter in fish pond wastewater without occupying additional land, reducing treatment costs, and at the same time planting economic crops such as water spinach to generate economic value.
Smart Images
Figure CN222827917U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical fields of environmental engineering and ecology, and in particular to an ecological system for treating decentralized small-scale fish pond wastewater, which can in situ reduce pollutants in the fish pond wastewater. Background Art
[0002] Fish pond aquaculture wastewater is one of the main sources of non-point pollution. Large-scale fish pond aquaculture wastewater is usually treated by "three ponds and two dams", "constructed wetlands" or "integrated sewage treatment facilities". The technology is relatively mature and the cost per unit volume of wastewater treatment is low. The decentralized small fish pond wastewater is treated by the above methods, but the cost per unit volume of wastewater treatment is high and the feasibility is not strong in actual projects.
[0003] Therefore, aiming at the treatment of decentralized small fish pond wastewater, combined with the natural treatment engineering technology of environmental engineering sewage, an ecological technology for treating decentralized small fish pond wastewater was invented. By setting a treatment unit of a certain area in the existing breeding pond, the nitrogen, phosphorus, organic matter and other pollutants in the fish pond wastewater are reduced. This technology does not lead to the occupation of additional land and has low cost. In addition, edible water spinach and water celery are planted in the treatment unit, which generates certain economic value and has relatively good application prospects. Utility Model Content
[0004] The purpose of the utility model is to solve the problem of decentralized small fish pond wastewater treatment, and to provide an ecological system for treating decentralized small fish pond wastewater, which can reduce pollutants such as nitrogen, phosphorus and organic matter in the fish pond wastewater in situ. At the same time, the technology does not lead to additional land occupation, has low cost, and can generate certain additional economic value.
[0005] In order to achieve the above objectives, the utility model provides the following technical solutions:
[0006] An ecological system for treating wastewater from decentralized small fish ponds, comprising an ecological purification ditch, which is arranged inside the fish pond, and the wastewater from the fish pond enters the ecological purification ditch through a water pump, and a composite water filter dam is arranged in the ecological purification ditch. The wastewater from the fish pond is initially purified by the ecological purification ditch and the multi-stage composite water filter dam and deeply purified by the ecological purification pool, and then flows back to the fish pond;
[0007] As described above, the ecological purification ditch is separated from the fish pond by geotextile bags, the bottom of the ecological purification ditch is paved with ecological water purification clay gravel, and a planting floating tray is arranged on the upper part of the ecological purification ditch, in which edible water spinach is planted.
[0008] As described above, the ecological purification pool is located inside the fish pond, and the area of the ecological purification pool accounts for 5%-10% of the area of the fish pond. The ecological purification pool is divided into a carbon fiber water plant purification area and an emergent plant purification area through internal grids, and the water inlet and outlet are arranged along the S shape to ensure that the fish pond wastewater flows fully in the carbon fiber water plant purification area and the emergent plant purification area.
[0009] As described above, the composite water filter dam is arranged in the ecological purification ditch at intervals of 10m. The bottom and surrounding areas of the composite water filter dam are steel meshes, and the top is a removable perforated steel cover. The interior of the composite water filter dam is filled with composite ecological filter material, which is composed of a mixture of ecological water purification clay gravel and gravel in a certain proportion.
[0010] Compared with the prior art, the utility model has the following advantages and effects:
[0011] 1. The ecological purification ditch and ecological purification pool of the treatment unit are arranged in the fish pond, which does not occupy additional land and has a wide range of applications.
[0012] 2. The internal filler of the composite water filter dam is a mixture of ecological water purification clay gravel and gravel. Under the premise of ensuring the stability and safety of the composite water filter dam, the specific surface area of the internal filler of the composite ecological water filter dam is increased, and the purification effect is good.
[0013] 3. A switchable perforated steel cover is provided on the top of the water filter dam to facilitate regular cleaning of the internal composite ecological filter material.
[0014] 4. Planting edible water spinach on floating trays inside the ecological purification ditch has good economic value. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a plan view of the utility model.
[0016] Figure 2 This is a cross-sectional view of the ecological purification ditch of the present utility model.
[0017] Figure 3 This is a large-scale drawing of the ecological permeable dam of this utility model.
[0018] In the figure: 1-ecological purification ditch; 101-ecological water purification clay gravel; 102-geobag; 103-planting floating plate; 2-multi-stage composite water filtration dam; 201-steel mesh; 202-perforated steel cover; 203-composite ecological filter material; 3-ecological purification pool; 301-carbon fiber aquatic plant purification area; 302-emergent plant purification area; 303-grid stem; 4-water pump; 5-fish pond, 6-water inlet; 7-water outlet. DETAILED DESCRIPTION
[0019] The technical solution of the utility model is further described below in conjunction with the accompanying drawings and specific embodiments.
[0020] like Figure 1 As shown, the ecological purification ditch (1) is arranged inside the fish pond (5), the fish pond wastewater enters the ecological purification ditch (1) through the water pump (4), a multi-stage composite water filter dam (2) is arranged in the ecological purification ditch (1), the fish pond wastewater is initially purified through the ecological purification ditch (1) and the multi-stage composite water filter dam (2), and then enters the ecological purification pool (3) through the water inlet (6), and after deep purification, is discharged to the fish pond (5) through the water outlet (7);
[0021] like Figure 1 As shown, the ecological purification pool (3) is located inside the fish pond (5), and the area of the ecological purification pool (3) accounts for 5%-10% of the area of the fish pond (5). The ecological purification pool (3) is divided into a carbon fiber water grass purification area (301) and an emergent plant purification area (302) by a grid (303). The water inlet (6) and the water outlet (7) are arranged along an S shape to ensure that the fish pond wastewater fully flows in the carbon fiber water grass purification area (301) and the emergent plant purification area (302).
[0022] like Figure 2 As shown, the ecological purification ditch (1) is separated from the fish pond (5) by a geobag (102), the bottom of the ecological purification ditch (1) is paved with ecological water purification clay gravel (101), and a planting floating tray (103) is arranged on the upper part of the ecological purification ditch (2), and edible water spinach is planted in the planting floating tray (103).
[0023] like Figure 3 As shown, the composite water filter dam (2) is arranged in the ecological purification ditch (1) at intervals of 10m. The bottom and surrounding areas of the composite water filter dam (2) are steel mesh (201), and the top is a detachable perforated steel cover (202). The composite water filter dam (2) is filled with composite ecological filter material (203), and the composite ecological filter material (203) is composed of ecological water purification clay gravel (101) and gravel mixed in a certain proportion.
[0024] The length of the ecological purification ditch (1) is determined according to site conditions, with a bottom width ≥1.0m, a depth ≥1.0m, and a longitudinal slope of the bottom ≥1‰.
[0025] The ecological water purification clay gravel (101) is made of fish pond bottom mud and plant straw mixed in proportion and fired at high temperature, with an internal structure of honeycomb, a porosity of ≥45%, an external shape of approximately sphere, and a particle size of 0.2m-0.3m. The ecological water purification clay gravel (101) is laid at the bottom of the ecological purification ditch (1) with a thickness of 0.3m-0.5m.
[0026] The planting floating tray (103) has a size of 1.0m×2.0m, is arranged longitudinally along the long side of the ecological purification ditch (1), and is arranged at intervals of 3-5m. The planting floating tray is fixed to the shore by a nylon rope.
[0027] The bottom and surrounding of the composite filter dam (2) are steel mesh, with 6mm steel bars and a spacing of 0.15m. A reinforcing rib with a diameter of 20mm is set every 0.45m. The top of the mesh is a detachable perforated steel cover with a thickness of 4mm-6mm.
[0028] The carbon fiber waterweed purification area (301) is arranged with carbon fiber material, with a length of 60cm / strip and a specific surface area of ≥500m 2 / g, laying density ≥ 4 / m 2 The emergent plant purification area (302) is planted with calamus or calamus, with a planting density of 25 to 30 plants / m 2 .
[0029] The use process of the utility model is as follows:
[0030] The fish pond wastewater enters the ecological purification ditch (1) through a water pump (4), the SS in the wastewater is precipitated through a multi-stage composite filter dam (2), and the N and P substances in the wastewater are initially removed through the clay gravel (101) at the bottom of the ecological purification ditch (1) and the composite ecological filter material (203) inside the composite filter dam (2).
[0031] After preliminary purification, the fish pond wastewater enters the ecological purification pool (3) through the water inlet (6). A carbon fiber water plant area (301) is set in the ecological purification pool (3) to treat the fish pond wastewater through the contact oxidation effect of the biofilm on the carbon fiber water plants. The pollution load in the wastewater is further reduced through the interception and root adsorption effect of calamus or calamus planted in the emergent plant purification area (302). The fish pond wastewater that meets the standards flows back to the fish pond through the connecting pipe (7).
[0032] The specific implementations described herein are merely illustrative of the spirit of the present invention. A person skilled in the art of the present invention may make various modifications or additions to the specific examples described or replace them in a similar manner, but this will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. An ecological system for treating wastewater from decentralized small fish ponds, characterized in that: The ecological purification ditch (1) is arranged inside the fish pond (5), and the wastewater from the fish pond enters the ecological purification ditch (1) through a water pump (4). A multi-stage composite water filter dam (2) is arranged in the ecological purification ditch (1). The wastewater from the fish pond is initially purified by the ecological purification ditch (1) and the multi-stage composite water filter dam (2) and deeply purified by the ecological purification pool (3), and then flows back to the fish pond (5).
2. The ecological system for treating decentralized small fish pond wastewater according to claim 1, characterized in that: The ecological purification ditch (1) is separated from the fish pond (5) by a geotextile bag (102), the bottom of the ecological purification ditch (1) is paved with ecological water purification clay gravel (101), and a planting floating tray (103) is arranged on the upper part of the ecological purification ditch (1), and water spinach with edible value is planted in the planting floating tray (103).
3. The ecological system for treating decentralized small fish pond wastewater according to claim 1, characterized in that: The ecological purification pool (3) is located inside the fish pond (5), and the area of the ecological purification pool (3) accounts for 5%-10% of the area of the fish pond (5). The ecological purification pool (3) is divided into a carbon fiber water grass purification area (301) and an emergent plant purification area (302) by a grid stem (303). The water inlet (6) and the water outlet (7) are arranged along an S shape to ensure that the fish pond wastewater fully flows in the carbon fiber water grass purification area (301) and the emergent plant purification area (302).
4. The ecological system for treating decentralized small fish pond wastewater according to claim 1, characterized in that: The composite water filter dam (2) is arranged in the ecological purification ditch (1) at intervals of 10m. The bottom and surrounding areas of the composite water filter dam (2) are steel mesh (201), and the top is a detachable perforated steel cover (202). The composite water filter dam (2) is filled with composite ecological filter material (203), and the composite ecological filter material (203) is composed of ecological water purification clay gravel (101) and gravel mixed in a certain proportion.