CN111003892A - Composite distributed rural sewage treatment system - Google Patents
Composite distributed rural sewage treatment system Download PDFInfo
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- CN111003892A CN111003892A CN201911363901.6A CN201911363901A CN111003892A CN 111003892 A CN111003892 A CN 111003892A CN 201911363901 A CN201911363901 A CN 201911363901A CN 111003892 A CN111003892 A CN 111003892A
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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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
- C02F3/28—Anaerobic digestion processes
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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
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
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Abstract
The invention provides a composite distributed rural sewage treatment system which comprises a grid pond, a collective hydrolysis pond, a wetland earthworm pond, an algae pond and an artificial wetland, wherein the grid pond, the collective hydrolysis pond, the wetland earthworm pond, the algae pond and the artificial wetland are communicated through pipelines in sequence; the wetland earthworm pond is provided with a water distribution pipe, an earthworm filter layer, a soil layer, a filter material layer and a gravel layer from top to bottom, the water distribution pipe is communicated with a water outlet pipeline of the integrated hydrolysis pond, a water outlet of the water distribution pipe is arranged above the earthworm filter layer, a water outlet of the wetland earthworm pond is arranged below the gravel layer of the wetland earthworm pond, the earthworm filter layer comprises earthworms and a first filter material, and the first filter material comprises a cellulose plant material; the algae pond is internally provided with a vertically suspended algae hanging net, algae are attached to the algae hanging net, and the algae pond is also internally provided with an aeration device. The composite distributed rural sewage treatment system has the advantages of simple and reasonable structure, low operation cost and good removal effect on nitrogen, phosphorus and organic matters in sewage.
Description
Technical Field
The invention belongs to the technical field of water treatment of environmental engineering, and particularly relates to a composite distributed rural sewage treatment system.
Background
Since the new century, along with the increasing expansion of rural economy, the living standard of farmers is improved year by year, so that the discharge amount of rural domestic sewage is continuously increased, which not only relates to the production and life of the farmers, but also relates to the fair sense of the whole society. Therefore, the problem of solving the rural domestic sewage is urgent.
Rural domestic sewage generally has the characteristics of dispersed discharge, large change of water quality and water quantity and the like, and rural sewage collection and treatment facilities are imperfect, so that water environment pollution is easily caused, and drinking water safety of villagers is influenced. In addition, due to the limitation of rural economic conditions, the urban sewage treatment technology or mode cannot be directly carried out, so that a corresponding sewage treatment facility needs to be constructed by selecting a proper sewage treatment means according to the actual rural conditions.
In recent years, with the advance of domestic sewage treatment projects in rural areas throughout the country, a plurality of sewage treatment processes have appeared, and the activated sludge process, the Membrane Bioreactor (MBR) process, the a2/O sewage treatment process, the artificial wetland and the like are representative. However, the single water treatment technology is applied to small-scale sewage treatment in decentralized rural areas in China, and the water treatment system is complex in structure, inconvenient to manage and low in treatment efficiency.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a composite distributed rural sewage treatment system.
In order to achieve the purpose, the invention adopts the technical scheme that: a composite and dispersive rural sewage treatment system comprises a grid pond, a collective hydrolysis pond, a wetland earthworm pond, an algae pond and an artificial wetland, wherein the grid pond, the collective hydrolysis pond, the wetland earthworm pond, the algae pond and the artificial wetland are sequentially communicated through pipelines;
the wetland earthworm pond is provided with a water distribution pipe, an earthworm filter layer, a soil layer, a filter material layer and a gravel layer from top to bottom, the water distribution pipe is communicated with a water outlet pipeline of the integrated hydrolysis pond, a water outlet of the water distribution pipe is arranged above the earthworm filter layer, the wetland earthworm pond is provided with a water outlet, a water outlet of the wetland earthworm pond is arranged below the gravel layer of the wetland earthworm pond, the earthworm filter layer comprises earthworms and a first filter material, and the first filter material comprises a cellulose plant material;
the algae pond is internally provided with a vertically suspended algae hanging net, algae are attached to the algae hanging net, and the algae pond is also internally provided with an aeration device.
The composite distributed rural sewage treatment system is simple and reasonable in structure, low in operation cost and good in removal effect on nitrogen, phosphorus and organic matters in sewage.
Preferably, the collection hydrolysis tank is vertically provided with a first partition plate and a second partition plate, the collection hydrolysis tank is divided into a settling zone, an ascending zone and an acidification hydrolysis zone, the settling zone is communicated with the grid tank pipeline, the ascending zone is positioned between the first partition plate and the second partition plate, the settling zone is positioned on one side of the first partition plate, the acidification hydrolysis zone is positioned on one side of the second partition plate, the first partition plate is parallel to the second partition plate, the first partition plate is provided with a first through hole, the first through hole is communicated with the settling zone and the ascending zone, the second partition plate is provided with a second through hole, the second through hole is communicated with the ascending zone and the acidification hydrolysis zone, and the acidification hydrolysis zone is communicated with a water distribution pipe pipeline of the wetland tank.
According to the composite distributed rural sewage treatment system, the removal effect of nitrogen, phosphorus and organic matters in sewage is improved by integrating the hydrolysis tank.
Preferably, the algae pond comprises more than 3 algae hanging net areas, an interval is reserved between every two algae hanging net areas, an aeration device is arranged in each interval, 3-15 vertically hung algae hanging nets which are parallel to each other are arranged in each algae hanging net area, and the distance between every two adjacent algae hanging nets in the 3-15 vertically hung algae hanging nets which are parallel to each other is 5-20 cm.
According to the composite distributed rural sewage treatment system, the position of the algae hanging net in the algae pond is arranged, so that the removal effect of nitrogen, phosphorus and organic matters in sewage is improved.
Preferably, the vertical length of the algae hanging net is 0.5-1 m, and the algae hanging net is made of plush with a three-dimensional porous structure, spun gold velvet with a three-dimensional porous structure or PP cotton with a three-dimensional porous structure.
Preferably, the earthworms in the earthworm filter layer of the wetland earthworm pond are one or more of Eisenia foetida, No. 6 earthworms entering the farming and No. one earthworms Sichuan earthworm; the cellulose plant material comprises peanut shells, straws and wood chips; the filter material layer of the wetland earthworm pond comprises fly ash, fly ash ceramsite, zeolite, expanded vermiculite and shale ceramsite.
"Xinnong" No. 6 earthworm is also called straw earthworm, which is a kind of earthworm suitable for various crops and is cultivated by Handan Xuejingjun doctor in Hebei for many years.
Shannon No. 6 earthworm reference:
biological regulation of soil bioactivity and soil cadmium behavior in apple orchard [ D ]. doctor thesis of university of eastern Shandong agriculture, 2009.
Application of wormcast matrix in watermelon plug seedling is researched [ J ] Chinese melon and vegetable, 2006(1):14-16.
Earthworm reference No. Chuanluyi: development of the breeding technology of the Liwuyu, Liwenping and earthworm [ J ]. Hunan feed, 2010(04):25-27.
The earthworm I is a first-generation improved variety which is obtained by multi-hybridization, purification and rejuvenation of the earthworm I, namely the earthworm I in Taiwan, the earthworm Eisenia foetida and the earthworm I in Sichuan.
Preferably, a sedimentation tank is arranged on a pipeline between the wetland earthworm pond and the algae pond, and a grid is arranged in the sedimentation tank.
Preferably, a submersible mixer and an artificial floating island are further arranged in the algae pond, and one or more of water hyacinth, water peanuts, water white vegetables and red-seng are planted on the artificial floating island.
Preferably, the artificial wetland comprises a water inlet, a wetland substrate layer, a vent pipe distribution layer and a water outlet, wherein the wetland substrate layer comprises a rough wetland substrate layer, a middle-wet foundation layer and a fine wetland substrate layer from bottom to top, the filler of the wetland substrate layer is selected from one or more of gravel, zeolite, expanded vermiculite, shale ceramsite and fly ash ceramsite, the filler particle size of the rough wetland substrate layer is 50-60 mm, the filler particle size of the middle-wet foundation layer is 20-40 mm, the filler particle size of the fine wetland substrate layer is 10-16 mm, the water inlet of the artificial wetland is arranged above the fine wetland substrate layer, the water outlet of the artificial wetland is arranged below the rough wetland substrate layer, the vent pipe distribution layer is arranged between the middle-wet foundation layer and the fine wetland substrate layer, the vent pipe distribution layer is distributed with vent pipes, and vent pipes in the vent pipe distribution layer are uniformly provided with vent holes, the aeration pipe is communicated with the atmosphere, and one or more of calamus, canna, loosestrife, piny bluegrass and golden fish algae are planted on the thin wetland substrate layer.
According to the composite distributed rural sewage treatment system, the constructed wetland is arranged, so that the removal effect of nitrogen, phosphorus and organic matters in sewage is improved.
Preferably, the algae attached to the algae hanging net is periphyton algae.
Preferably, the grating pond is provided with a water inlet, a grating machine and a water outlet, the water inlet and the water outlet of the grating pond are positioned on two sides of the grating machine, and a water pump is arranged between the integrated hydrolysis pond and the wetland earthworm pond.
The invention has the beneficial effects that: the composite distributed rural sewage treatment system is simple and reasonable in structure, low in operation cost, convenient to manage, simple to maintain, low in sludge production and good in water quality of treated water, and has a good removal effect on nitrogen, phosphorus and organic matters in sewage.
Drawings
Fig. 1 is a schematic structural diagram of a composite distributed rural sewage treatment system according to an embodiment of the invention.
Fig. 2 is a schematic structural diagram of a composite distributed rural sewage treatment system according to an embodiment of the invention.
Fig. 3 is a schematic structural diagram of an algae pond of the composite decentralized rural sewage treatment system according to the embodiment of the invention.
The system comprises a grid pool 1, a grid pool 11, a water inlet of the grid pool 12, a grid machine 13, a water outlet of the grid pool 2, a collecting hydrolysis pool 21, a settling zone 22, a first through hole 23, an ascending zone 24, a second through hole 25, an acidification hydrolysis zone 26, an anaerobic hydrolysis zone 27, a water pump 28, a first partition plate 29, a second partition plate 3, a wetland earthworm pool 31, a water distribution pipe 32, an earthworm filter layer 33, a soil layer 34, a filter material layer 35, a gravel layer 4, an algae pool 41, an algae suspension net 42, a settling pool 43, an aeration device 44, an artificial floating island 45, a grid, 5, an artificial wetland 51, a wetland matrix layer 52, wetland plants 53 and a distribution layer.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
As shown in fig. 1, 2 and 3, the rural sewage treatment system comprises a grid pond 1, a collective hydrolysis pond 2, a wetland earthworm pond 3, an algae pond 4 and an artificial wetland 5 which are sequentially communicated through pipelines;
the wetland earthworm pond is provided with a water distribution pipe 31, an earthworm filter layer 32, a soil layer 33, a filter material layer 34 and a gravel layer 35 from top to bottom, the water distribution pipe 1 is communicated with a water outlet pipeline of the integrated hydrolysis pond 2, a water outlet of the water distribution pipe 31 is arranged above the earthworm filter layer 32, the wetland earthworm pond is provided with a water outlet, the water outlet of the wetland earthworm pond is arranged below the gravel layer 35 of the wetland earthworm pond, the earthworm filter layer 32 comprises earthworms and a first filter material, and the first filter material comprises a cellulose plant material;
the grating tank 1 is provided with a water inlet 11, a grating machine 12 and a water outlet 13, and the water inlet and the water outlet of the grating tank are positioned on two sides of the grating machine;
the algae pond 4 is internally provided with a vertically suspended algae hanging net 41, algae are attached to the algae hanging net, the algae attached to the algae hanging net are periplex algae, and the algae pond is also internally provided with an aeration device 43;
the integrated hydrolysis tank 2 is vertically provided with a first partition plate 28 and a second partition plate 29 to divide the integrated hydrolysis tank 2 into a precipitation zone 21, an ascending zone 23 and an acidification hydrolysis zone 25, an anaerobic hydrolysis zone 26 is arranged in the acidification hydrolysis zone 25, the precipitation zone 21 is communicated with a grid tank 1 through a pipeline, the ascending zone 23 is arranged between the first partition plate 28 and the second partition plate 29, the precipitation zone 21 is arranged on one side of the first partition plate 28, the acidification hydrolysis zone 25 is arranged on one side of the second partition plate 29, the first partition plate 28 is parallel to the second partition plate 29, the first partition plate 28 is provided with a first through hole 22, the first through hole 22 is communicated with the precipitation zone 21 and the ascending zone 23, the second partition plate 29 is provided with a second through hole 24, the second through hole 24 is communicated with the ascending zone 23 and the acidification hydrolysis zone 25, and the acidification hydrolysis zone 25 is communicated with a water distribution pipe 31 of.
In order to further improve the treatment efficiency of high-level sewage, the algae pond comprises more than 3 algae hanging net areas, a gap is reserved between every two algae hanging net areas, an aeration device is arranged in the gap, 3-15 vertically hanging algae hanging nets which are parallel to each other are arranged in every two algae hanging net areas, the distance between every two adjacent algae hanging nets in the 3-15 vertically hanging algae hanging nets which are parallel to each other is 5-20 cm, the vertical length of each algae hanging net is 0.5-1 m, and the algae hanging nets are made of three-dimensional porous plush, three-dimensional porous golden velvet or three-dimensional porous PP cotton.
The earthworms in the earthworm filter layer of the wetland earthworm pond are Eisenia fetida; the cellulose plant material comprises peanut shell, straw and wood dust; the filter material layer of the wetland earthworm pond comprises fly ash, fly ash ceramsite, zeolite, expanded vermiculite and shale ceramsite.
A sedimentation tank 42 is arranged on a pipeline between the wetland earthworm pond and the algae pond, a grid 45 is arranged in the sedimentation tank 42, and a water pump 27 is arranged between the collective hydrolysis tank 2 and the wetland earthworm pond 3;
the algae pond is also provided with a submersible mixer and an artificial floating island 44, and one or more of water hyacinth, water peanuts, water white vegetables and red river filling are planted on the artificial floating island.
In order to further improve the treatment efficiency of high-level sewage, the artificial wetland 5 comprises a water inlet, a wetland substrate layer 51, a vent pipe distribution layer 53 and a water outlet, wherein the wetland substrate layer comprises a rough wetland substrate layer, a middle wetland substrate layer and a fine wetland substrate layer from bottom to top, the filler of the wetland substrate layer is selected from one or more of gravel, zeolite, expanded vermiculite, shale ceramsite and fly ash ceramsite, the filler particle size of the rough wetland substrate layer is 50-60 mm, the filler particle size of the middle wetland substrate layer is 20-40 mm, the filler particle size of the fine wetland substrate layer is 10-16 mm, the water inlet of the artificial wetland is arranged above the fine wetland substrate layer, the water outlet of the artificial wetland is arranged below the rough wetland substrate layer, the vent pipe distribution layer is arranged between the middle wetland substrate layer and the fine wetland substrate layer, and vent pipes are distributed on the vent pipe distribution layer, the aeration pipes in the aeration pipe distribution layer are uniformly provided with air holes and communicated with the atmosphere, wetland plants 52 are planted on the fine wetland substrate layer, and the wetland plants 52 are one or more of calamus, canna indica, loosestrife, pinus parviflora and golden fish algae.
Comparative example 1
The only difference between the comparative example and the example 1 is that: the rural sewage treatment system comprises a grid pond 1, a collection hydrolysis pond 2, a wetland earthworm pond 3 and an artificial wetland 5 which are communicated by pipelines in sequence.
Comparative example 2
The only difference between the comparative example and the example 1 is that: the rural sewage treatment system comprises a grid pond 1, a collection hydrolysis pond 2, an algae pond 4 and an artificial wetland 5 which are communicated through pipelines in sequence.
Effect example 1
Rural domestic sewage is treated by using the composite dispersed rural sewage treatment system in the embodiment 1 and the comparative examples 1-2, and the COD value and NH value of effluent are monitored through a water outlet4 +N content and phosphorus content to investigate the efficiency of the domestic sewage treatment system in purifying sewage. The results are shown in table 1:
table 1 application effect of the composite decentralized rural sewage treatment system of example 1 and comparative examples 1-2
As can be seen from the results in table 1, the treatment effect of the composite distributed rural sewage treatment system of example 1 on the rural sewage is better than that of comparative example 1 and comparative example 2, which shows that the composite distributed rural sewage treatment system of example 1 has a better treatment effect and obtains a synergistic effect by combining the wetland earthworm ponds 3 and the algae ponds 4.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The composite distributed rural sewage treatment system is characterized by comprising a grid pond, a collective hydrolysis pond, a wetland earthworm pond, an algae pond and an artificial wetland which are communicated with one another by pipelines in sequence;
the wetland earthworm pond is provided with a water distribution pipe, an earthworm filter layer, a soil layer, a filter material layer and a gravel layer from top to bottom, the water distribution pipe is communicated with a water outlet pipeline of the integrated hydrolysis pond, a water outlet of the water distribution pipe is arranged above the earthworm filter layer, the wetland earthworm pond is provided with a water outlet, a water outlet of the wetland earthworm pond is arranged below the gravel layer of the wetland earthworm pond, the earthworm filter layer comprises earthworms and a first filter material, and the first filter material comprises a cellulose plant material;
the algae pond is internally provided with a vertically suspended algae hanging net, algae are attached to the algae hanging net, and the algae pond is also internally provided with an aeration device.
2. The rural sewage treatment system of claim 1, wherein the collection hydrolysis tank is vertically provided with a first partition plate and a second partition plate to divide the collection hydrolysis tank into a settling zone, an ascending zone and an acidification hydrolysis zone, the settling zone is communicated with the grid tank pipeline, the ascending zone is located between the first partition plate and the second partition plate, the settling zone is located on one side of the first partition plate, the acidification hydrolysis zone is located on one side of the second partition plate, the first partition plate is parallel to the second partition plate, the first partition plate is provided with a first through hole, the first through hole is communicated with the settling zone and the ascending zone, the second partition plate is provided with a second through hole, the second through hole is communicated with the ascending zone and the acidification hydrolysis zone, and the acidification hydrolysis zone is communicated with the water distribution pipeline of the wetland earthworm tank.
3. The rural sewage treatment system of claim 1, wherein the algae pond comprises more than 3 algae hanging net areas, a gap is reserved between each algae hanging net area, an aeration device is arranged in each gap, 3-15 vertically hanging algae hanging nets which are parallel to each other are arranged in each algae hanging net area, and the distance between two adjacent algae hanging nets in the 3-15 vertically hanging algae hanging nets which are parallel to each other is 5-20 cm.
4. The rural sewage treatment system of claim 3, wherein the vertical length of the algae hanging net is 0.5-1 m, and the algae hanging net is made of plush with a three-dimensional porous structure, spun gold velvet with a three-dimensional porous structure or PP cotton with a three-dimensional porous structure.
5. The rural sewage treatment system of claim 1, wherein the earthworms in the earthworm filter of the wetland earthworm basin are one or more of Eisenia foetida, No. 6 earthworm of Engnonment and No. one earthworm of Lumbria tubificans; the cellulose plant material comprises peanut shells, straws and wood chips; the filter material layer of the wetland earthworm pond comprises fly ash, fly ash ceramsite, zeolite, expanded vermiculite and shale ceramsite.
6. The rural sewage treatment system of claim 1, wherein a sedimentation tank is arranged on a pipeline between the wetland earthworm pond and the algae pond, and a grid is arranged in the sedimentation tank.
7. The rural sewage treatment system of claim 1, wherein a submersible mixer and an artificial floating island are further arranged in the algae pond, and one or more of water hyacinth, water peanuts, water hyacinth and red river filling are planted on the artificial floating island.
8. The rural sewage treatment system of claim 1, wherein the artificial wetland comprises a water inlet, a wetland substrate layer, a vent pipe distribution layer and a water outlet, the wetland substrate layer comprises a rough wetland substrate layer, a middle-wet foundation layer and a fine wetland substrate layer from bottom to top, the filler of the wetland substrate layer is selected from one or more of gravel, zeolite, expanded vermiculite, shale ceramsite and fly ash ceramsite, the filler particle size of the rough wetland substrate layer is 50-60 mm, the filler particle size of the middle-wet foundation layer is 20-40 mm, the filler particle size of the fine wetland substrate layer is 10-16 mm, the water inlet of the artificial wetland is arranged above the fine wetland substrate layer, the water outlet of the artificial wetland is arranged below the rough wetland substrate layer, and the vent pipe distribution layer is arranged between the middle-wet foundation layer and the fine wetland substrate layer, the aeration pipe distribution layer is distributed with aeration pipes, the aeration pipes in the aeration pipe distribution layer are uniformly provided with air holes, the aeration pipes are communicated with the atmosphere, and one or more of calamus, canna indica, loosestrife, piny bluegrass and golden fish algae are planted on the thin wetland substrate layer.
9. The rural sewage treatment system of claim 1, wherein the algae attached to the algae hanging net is periphyton algae.
10. The rural sewage treatment system of claim 1, wherein the grating tank is provided with a water inlet, a grating machine and a water outlet, the water inlet and the water outlet of the grating tank are positioned at two sides of the grating machine, and a water pump is arranged between the integrated hydrolysis tank and the wetland earthworm tank.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20220324736A1 (en) * | 2021-04-13 | 2022-10-13 | Laguna Innovation Ltd. | Transportable wastewater treatment systems and methods |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20220324736A1 (en) * | 2021-04-13 | 2022-10-13 | Laguna Innovation Ltd. | Transportable wastewater treatment systems and methods |
| US11597671B2 (en) * | 2021-04-13 | 2023-03-07 | Laguna Innovation Ltd. | Transportable wastewater treatment systems and methods |
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