CN214031897U - Wetland plant straw cyclic utilization system - Google Patents
Wetland plant straw cyclic utilization system Download PDFInfo
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- CN214031897U CN214031897U CN202022787746.5U CN202022787746U CN214031897U CN 214031897 U CN214031897 U CN 214031897U CN 202022787746 U CN202022787746 U CN 202022787746U CN 214031897 U CN214031897 U CN 214031897U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/40—Bio-organic fraction processing; Production of fertilisers from the organic fraction of waste or refuse
Abstract
The utility model discloses a wetland plant straw cyclic utilization system, including compound constructed wetland, compound constructed wetland is including collecting the distribution well, is equipped with the packing layer in the collection distribution well, plants the plant in the packing layer, and the packing layer midlevel is provided with inlet tube and outlet pipe, and the inlet tube sets up in the outlet pipe upside, and the system still includes the straw and deals with the room, and the straw is dealt with the room and is included fertilizer storage area, and the filtration liquid collecting pipe has been arranged on the ground that the straw was dealt with the room, and many filtration liquid collecting pipes communicate with the back flow respectively, back flow and inlet tube intercommunication. The compost leachate is rich in a large amount of pollutants such as COD, TN, TP and the like, and can be used as a supplementary carbon source of the composite artificial wetland, so that the biodegradability of the inflow water of the artificial wetland is improved, and the nitrogen and phosphorus removal efficiency is enhanced. The compost rotten clinker can be used as a wetland plant seedling raising substrate and matched with a planting basket to culture container seedlings, is used for the supplement planting and maintenance of wetland plants, and can avoid filler blockage caused by plant litters.
Description
Technical Field
The utility model relates to a water ecological remediation field, especially a wetland plant straw cyclic utilization system.
Background
The artificial wetland is a sewage treatment ecological engineering technology developed in the 70 s of the 20 th century. After more than forty years of development, the artificial wetland has both the sewage purification treatment function and the ecological environment beautifying function, is widely applied to the fields of micro-sewage treatment, domestic sewage (deep) treatment, lake pollution prevention and control and the like, and is considered to be one of the most important ecological infrastructures for ecological civilization construction and sponge city construction.
However, the practical problems that wetland plants grow poorly, fillers are easy to block after the wetland plants operate for many years, a large amount of wetland straws are difficult to dispose every year and the like generally exist in the application of constructed wetland engineering in China. Long-term engineering investigation, process research, operation practice and analysis summarization show that the artificial wetland usually adopts large-particle inorganic filler, which is often lack of organic matters, so that poor plant growth is easily caused, and even a great amount of wetland plants die and need frequent reseeding; the wetland plants have high drying and dewatering cost due to high water content, and are not suitable for being used as animal feed or entering a food chain due to the enrichment of a large amount of pollutants, so that the resource utilization has a difficult problem; the withered and fallen objects, plant death residues and decomposition products thereof generated after the wetland plants wither in winter are important contributors to the organic matter content of the artificial wetland and are one of the important reasons for causing the filler blockage.
In the prior art, a large number of patents related to composite artificial wetlands and straw treatment exist: the patent with the publication number of CN207792822U relates to the field of sewage treatment, in particular to a town sewage treatment wetland system. The town sewage treatment wetland system comprises a pretreatment device (1), a primary wetland device (2), a secondary wetland device (3) and a water storage tank (4); the pretreatment device (1) is connected with the primary wetland device (2) through a water inlet pipe (5), and the primary wetland device (2) is connected with the secondary wetland device (3) through a main water distribution pipe (6); the primary wetland device (2) is sequentially provided with a fine sand layer (2-1), a coarse sand layer (2-2) and a gravel layer (2-3) from top to bottom, and emergent aquatic plants are planted on the surface layer of the primary wetland device (2); the water distribution main pipe (6) is connected with a plurality of water distribution branch pipes (7), and the water distribution branch pipes (7) are arranged in gaps of a filler layer (8) in the secondary wetland device (3). The patent with publication number CN109650958A relates to a straw composting process, an organic fertilizer and a preparation method thereof, wherein the straw composting process comprises the following steps: rubbing and crushing the straws to 8-15 cm in length, mixing the straws with manure, and controlling the water content to be 55-65% and the carbon-nitrogen ratio to be 20-30:1 to obtain a mixed material; placing the mixed material in a compost box, sealing the compost box, heating to 70 +/-2 ℃, and sterilizing and softening the mixed material; intermittently supplying air to the compost box to maintain the temperature of the materials at 50-65 ℃, keeping the oxygen content in the compost box not lower than 10%, and performing forced aerobic fermentation for 4-6 days at the first stage; and then introducing a large amount of air into the compost box, reducing the temperature of the materials to be within 50 ℃, naturally heating the materials and intermittently supplying air, keeping the oxygen content in the compost box to be not less than 16%, carrying out second-stage forced aerobic fermentation for 3-5 days, cooling to room temperature, and aging to obtain the fertilizer. But at present, no technology for combining the composite artificial wetland with straw treatment is available. Therefore, in order to solve the above problems and the disadvantages of the prior art of the current artificial wetland, a wetland plant straw recycling system is needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that, it is not enough to prior art, provide a wetland plant straw cyclic utilization system, have pertinence to handle the processing to wetland plant straw, improve the structure of wetland unit simultaneously to realize constructed wetland's steady operation.
In order to solve the technical problem, the utility model discloses the technical scheme who adopts is: the utility model provides a wetland plant straw cyclic utilization system, includes compound constructed wetland, compound constructed wetland includes collection distribution well, be equipped with the packing layer in the collection distribution well, the plant has been planted in the packing layer, the packing layer midlevel is provided with inlet tube and outlet pipe, the inlet tube set up in the outlet pipe upside, the system still includes the straw and deals with the room, the straw is dealt with the room and is included fertilizer storage area, the filtration liquid collecting pipe has been arranged on the ground that the straw was dealt with the room, many the filtration liquid collecting pipe communicates with the back flow respectively, the back flow with the inlet tube intercommunication.
The straws in the straw disposal room are composted and aged to generate leachate, and the leachate is collected to a return pipe through a collecting pipe and is conveyed to a water inlet pipe of the composite artificial wetland through the return pipe. The compost leachate is rich in a large amount of pollutants such as COD, TN, TP and the like and can be used as a supplementary carbon source of the artificial wetland.
Furthermore, the straw disposal room further comprises a straw stacking and crushing area, a composting reaction area and an aging area which are sequentially arranged, and the aging area is adjacent to the organic fertilizer storage area. The straw can be directly crushed, composted and aged in the straw disposal room, and the straw disposal efficiency is improved.
Furthermore, the straw disposal room also comprises a deodorization system, so that the air circulation of the straw disposal room is enhanced, and the air is purified.
Furthermore, the straw disposal room is a sunlight room with a light-transmitting roof, and straws can be directly aired in the straw disposal room.
Further, the plants are wetland plant container seedlings. When the plants in the composite artificial wetland die, the plants died of diseases can be directly taken out together with the container, and new container seedlings are implanted again to prevent the died plants from blocking the filler layer.
Furthermore, straw decomposed organic fertilizer is filled in the container of the container seedling planting basket, the growth of wetland plants can be promoted, a plurality of holes with the diameter of 0.5-1cm are formed in the wall and the bottom of the planting basket, root systems are allowed to grow out of the container, oxygen is supplied to the wetland filler, the tillering of the wetland plants can be limited to a certain extent by the container, the plant bundles are prevented from being too dense, and the workload of the wetland cultivation is reduced.
Furthermore, the packing layer comprises a first packing layer, a second packing layer and a third packing layer which are distributed from bottom to top, the particle size range of the first packing layer is 4-5cm, the particle size range of the second packing layer is 2-4cm, the particle size range of the third packing layer is 1-2cm, the particle sizes of the packing layers from bottom to top are reduced in sequence, and the sewage treatment effect is enhanced.
Furthermore, the bottom of the water collecting and distributing well is provided with an impermeable layer.
Further, the water outlet pipe is communicated with the natural wetland. The water after the purification treatment of the composite artificial wetland is directly discharged to the natural wetland through the water outlet pipe.
Compared with the prior art, the utility model discloses the beneficial effect who has does: the utility model discloses a between compound constructed wetland and straw are dealt with, the compost filtration liquid that straw compost, ageing produced is rich in pollutants such as a large amount of COD, TN, TP in the compost filtration liquid, can regard as compound constructed wetland's supplementary carbon source, improves the biodegradability that constructed wetland intake, reinforcing nitrogen and phosphorus removal efficiency. The compost rotten clinker can be used as a wetland plant seedling raising substrate and matched with a planting basket to culture container seedlings, is used for the supplement planting and maintenance of wetland plants, and can avoid filler blockage caused by plant litters.
Drawings
Fig. 1 is a schematic diagram of the module structure of the present invention.
Fig. 2 is a schematic structural view of the composite artificial wetland of the utility model.
FIG. 3 is a schematic structural view of the straw disposal room of the present invention.
Detailed Description
As shown in fig. 1, the wetland plant straw recycling system comprises a composite artificial wetland 1 and a straw disposal room 2.
As shown in fig. 2, the composite artificial wetland 1 comprises an oxidation pond and a subsurface flow artificial wetland unit which are connected, wherein submerged plants 13 are mainly planted in the oxidation pond, and the plants 13 are emergent wetland plant container seedlings for adsorbing and precipitating SS in water. The subsurface flow constructed wetland unit comprises a water collecting and distributing well 11, a packing layer 12 is arranged in the water collecting and distributing well 11, plants 13 are planted in the packing layer 12, a water inlet pipe 14 and a water outlet pipe 15 are horizontally arranged in the packing layer 12, and the water inlet pipe 14 is arranged on the upper side of the water outlet pipe 15. The subsurface flow constructed wetland unit also comprises a water distribution main pipe and branch pipes, the water distribution main pipe and the branch pipes are uniformly distributed in the packing layer 12, and the water in the water inlet pipe 14 is uniformly distributed in the packing layer 12. The filler layer 12 includes a first filler layer 121, a second filler layer 122 and a third filler layer 123 distributed from bottom to top. The first packing layer 121, the second packing layer 122 and the third packing layer 123 adopt crushed stone packing with different grain diameters. The bottom of the collecting and distributing well 11 is provided with an impermeable layer 16.
As shown in FIG. 3, the straw disposal room 2 comprises an organic fertilizer storage area 21, a percolate collecting pipe 22, a return pipe 23, a straw stacking and crushing area 24, a composting reaction area 25, an aging area 26 and a deodorization system. A percolate collecting pipe 22 is arranged on the ground of the straw disposal room 2, and a plurality of percolate collecting pipes 22 are respectively communicated with a return pipe 23. A straw stacking and crushing zone 24, a composting reaction zone 25 and an aging zone 26 are sequentially arranged in the straw disposal room 2. The straw disposal room 2 is a sunlight room with a light-transmitting roof. A straw airing area and a straw crusher are arranged in the straw stacking and crushing area 24, the straws are dried and then processed and crushed by the straw crusher, and a composting machine is arranged in the composting reaction area 25 and is used for fermenting the crushed straws.
The return pipe 23 of the straw disposal room 2 is communicated with the water inlet pipe 14 of the composite artificial wetland 1. The water outlet pipe 15 of the straw disposal room 2 is communicated with the natural wetland 3. The natural wetland is a wetland park, a landscape lake or a river near a tail water discharge port, emergent aquatic plants are planted at the revetment, and submerged plants are planted underwater.
The plant straws of the artificial wetland and the natural wetland are mechanically harvested at the end of summer and at the end of winter every year, and are transported to a straw disposal room. The method comprises the steps of crushing straws, continuously conveying the crushed straws to a composting machine for aerobic fermentation when the moisture content of the crushed straws is reduced to about 60% after primary airing, controlling the fermentation temperature to be 45-55 ℃ by controlling the air speed entering the composting machine, discharging when the moisture content is reduced to 50% after fermentation for 3-5 days, stacking the discharged materials into a stack, aging, keeping ventilation, controlling the temperature inside the stack to be 40-65 ℃, aging for 15-20 days, and fully fermenting and decomposing when the moisture content of the stack is reduced to be lower than 30%, wherein the stack can be directly used as a planting substrate.
The compost leachate is rich in a large amount of pollutants such as COD, TN, TP and the like, and can be used as a supplementary carbon source of the artificial wetland, so that the biodegradability of the inflow water of the artificial wetland is improved, and the nitrogen and phosphorus removal efficiency is enhanced.
The wetland plant breeding nursery 4 takes organic fertilizer composted in the straw treatment room as a planting substrate, takes the porous planting basket as a planting container, plants the tillering buds of the artificial wetland plant for planting and breeding, plants the container seedlings in the artificial wetland and the natural wetland after vigorous growth, and can use the rest seedlings for landscaping. When the artificial wetland plant needs to be replanted, the plant died of illness can be directly taken out together with the container, and a new container seedling is implanted again.
The container is rich in organic matter content, can effectively supply plant nutrition, is not easy to be washed into deep filler after being wrapped by root systems to cause filler blockage, can limit tillering of emergent aquatic plants to a certain degree, is convenient to control plant gaps, and avoids diseases breeding due to over-dense wetland plants. The plant breeding nursery 4 can be irrigated by tail water of the composite artificial wetland.
Example 1
In a certain sewage plant in the south-middle part, which takes the composite artificial wetland as the sewage advanced treatment process, a comprehensive utilization system of the artificial wetland, the natural wetland, the straw disposal room and the wetland plant breeding garden is constructed, thereby realizing the recycling of sewage and the recycling of straw resources. 4 ten thousand tons of sewage are treated by the artificial wetland daily, the artificial wetland and the natural wetland are treated in batches in a straw treatment room to generate straws, a large amount of organic fertilizer is produced for breeding wetland plants, and the bred wetland plant container seedlings can be used for the supplementary planting of the artificial wetland and the natural wetland and the landscaping. The COD of the compost leachate is as high as 1389mg/L, and the compost leachate is used as an artificial wetland supplementary carbon source, so that the carbon-nitrogen ratio of sewage can be improved, and the nitrogen and phosphorus removal efficiency is enhanced.
Claims (8)
1. The utility model provides a wetland plant straw cyclic utilization system, includes compound constructed wetland (1), compound constructed wetland (1) is including collection distribution well (11), be equipped with packing layer (12) in collection distribution well (11), plant (13) in packing layer (12), packing layer (12) level is provided with inlet tube (14) and outlet pipe (15), inlet tube (14) set up in outlet pipe (15) upside, a serial communication port, the system still includes straw disposal room (2), straw disposal room (2) are including fertilizer storage area (21), percolate collecting pipe (22) have been arranged on the ground of straw disposal room (2), many percolate collecting pipe (22) communicate with back flow (23) respectively, back flow (23) with inlet tube (14) intercommunication.
2. The wetland plant straw recycling system according to claim 1, characterized in that the straw disposal room (2) further comprises a straw stacking and crushing zone (24), a composting reaction zone (25) and an aging zone (26) which are arranged in sequence, wherein the aging zone (26) is adjacent to the organic fertilizer storage area (21).
3. The wetland plant straw recycling system according to claim 2, characterized in that the straw treatment room (2) further comprises a deodorization system.
4. The wetland plant straw recycling system according to claim 1, wherein the straw disposal room (2) is a sunlight room with a transparent roof.
5. The wetland plant straw recycling system according to any one of claims 1 to 4, characterized in that the plants (13) are wetland plant container seedlings.
6. The wetland plant straw recycling system according to any one of claims 1 to 4, wherein the packing layer (12) comprises a first packing layer (121), a second packing layer (122) and a third packing layer (123) which are distributed from bottom to top, the particle size range of the first packing layer (121) is 4-5cm, the particle size range of the second packing layer (122) is 2-4cm, and the particle size range of the third packing layer (123) is 1-2 cm.
7. The wetland plant straw recycling system according to any one of claims 1 to 4, characterized in that the bottom of the water collection and distribution well (11) is provided with an impermeable layer (16).
8. The wetland plant straw recycling system according to any one of claims 1 to 4, characterized in that the water outlet pipe (15) is communicated with the natural wetland (3).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022787746.5U CN214031897U (en) | 2020-11-26 | 2020-11-26 | Wetland plant straw cyclic utilization system |
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| CN202022787746.5U CN214031897U (en) | 2020-11-26 | 2020-11-26 | Wetland plant straw cyclic utilization system |
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| CN214031897U true CN214031897U (en) | 2021-08-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114213162A (en) * | 2021-12-10 | 2022-03-22 | 北京城市排水集团有限责任公司 | Submerged plant recycling treatment method and device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114213162A (en) * | 2021-12-10 | 2022-03-22 | 北京城市排水集团有限责任公司 | Submerged plant recycling treatment method and device |
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