CN211521945U - Centralized sewage treatment system suitable for rural areas - Google Patents
Centralized sewage treatment system suitable for rural areas Download PDFInfo
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- CN211521945U CN211521945U CN201922077896.4U CN201922077896U CN211521945U CN 211521945 U CN211521945 U CN 211521945U CN 201922077896 U CN201922077896 U CN 201922077896U CN 211521945 U CN211521945 U CN 211521945U
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Abstract
A centralized sewage treatment system suitable for rural areas comprises a pretreatment module, a biological rotating disc module, an artificial wetland module and a photovoltaic power generation module, wherein sewage is discharged after passing through the pretreatment module, the biological rotating disc module and the artificial wetland module, and the photovoltaic power generation module provides electric energy for the biological rotating disc module; the artificial wetland module is an underflow artificial wetland, the underflow artificial wetland comprises a water inlet channel, a multi-stage wetland treatment unit and a water outlet channel, the sewage treated by the biological rotating disk module is uniformly distributed to the wetland treatment unit through the water inlet channel, and the sewage treated by the wetland treatment unit is discharged through a water discharge channel. Has the advantages that: a detailed constructed wetland modular structure technology is provided, so that the sewage treatment has the characteristics of low cost operation and simple operation and maintenance in practical significance; as an ecological sewage treatment plant, the method solves the problem of sewage treatment under the condition of zero input of energy, recycles the treated effluent to form a circulating ecological system, has landscape effect and has higher social benefit and environmental benefit.
Description
Technical Field
The utility model relates to a sewage treatment field, concretely relates to centralized sewage treatment system suitable for it is rural.
Background
With the rapid development of rural area economy, the discharge amount of rural sewage is continuously increased, and the discharge amount of rural sewage becomes a main source of nitrogen and phosphorus pollution of a plurality of drainage basins, so that water pollution and eutrophication of water bodies received and downstream estuaries and lakes are caused, and the water ecological environment is damaged. The rural sewage has high content of nitrogen and phosphorus nutrients, the coefficient of variation of water quality and water quantity is large, and because people live in the rural sewage relatively dispersedly, a drainage pipe network is not sound, and the collection is difficult. The technical means and procedures of the urban sewage treatment are complex, the operation and management cost is high, and the method is not suitable for popularization and application in rural areas.
In order to solve the serious current situation that sewage treatment systems in most rural areas are seriously deficient, CN203247173U discloses a high hydraulic load land infiltration system, which comprises a surface covering layer, a water distribution tank, a water distribution pipe arranged in the water distribution tank, a first artificial packing layer, a second artificial packing layer, a bottom bearing layer and a water outlet pipe, wherein a clay layer is also arranged between the first artificial packing layer and the second artificial packing layer, the first artificial packing layer and the second artificial packing layer are both formed by a fine particle vermiculite layer and a coarse particle vermiculite layer, and the fine particle vermiculite layer is laid on the coarse particle vermiculite layer. CN202785903U discloses a land infiltration system for rural domestic sewage, which designs a pool with a concrete bottom plate brick-built pool wall, wherein surface soil, lower soil, an isolation layer, a bearing layer and an impermeable layer are arranged in the pool from top to bottom in sequence; the surface soil is a cultivated soil layer and consists of fertile cultivated soil, a water distribution ditch and lower soil layer are arranged under the surface soil, an isolation layer is arranged under the lower soil layer, a bearing layer is arranged under the isolation layer, the isolation layer is used for preventing the upper soil from falling into the bearing layer, blocking a water flow channel, influencing the water distribution uniformity and preventing the soil from flowing into a system along with water, geotechnical cloth isolation is laid between the lower soil layer and the bearing layer, an impermeable layer is arranged under the bearing layer, the impermeable layer adopts a concrete bottom plate, a pool wall is built by bricks, and impermeable mortar whitewashing is adopted on the inner side and the outer side of the pool wall.
In order to improve the treatment effect of rural sewage, the technology in the aspects of urban sewage treatment such as artificial wetlands, artificial leakage treatment processes, oxidation ponds, biological filters and the like can be considered to be introduced into rural sewage treatment. The existing town sewage treatment system is generally based on a modularized green sewage treatment system, the modularized green sewage treatment system is also called as an ecological water magic cube, the ecological water magic cube generally comprises a pretreatment module, a biological rotating disc module, an artificial wetland module, a photovoltaic power generation module and the like, the modularized green ecological sewage treatment system is constructed based on a zero-energy-consumption idea, and the modularized green ecological sewage treatment system has the characteristics of maximized resource utilization, minimized energy consumption, clean energy utilization, integrated landscape of sewage treatment and ecology and the like, can realize self-sufficiency of energy, deeply treat and recycle sewage, and has the effects of beautiful landscape and climate regulation.
However, the existing modular ecological water magic cube disclosed in the prior art has certain defects, such as a green ecological sewage treatment system for treating high-concentration organic wastewater with publication number CN207632600U, which discloses various modules and connection relations among the modules, but the technical scheme has certain difficulties in the specific implementation engineering, and mainly shows that the detailed structure of each module is not embodied at all.
Also, for example, a sewage treatment system with a modularized biological rotating disk under publication number CN202968307U, the sewage treatment system also only discloses the components of the modules, and does not disclose the specific components of the modules.
The prior disclosed modular ecological water magic cube sewage treatment system lacks specific technical details, and therefore, a modular ecological water magic cube sewage treatment system with detailed technical details is needed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a to prior art not enough, a concentrated sewage system suitable for it is rural to do corresponding design according to rural environment, and confirmed sewage treatment system's concrete constitution in detail, thereby effectively realized rural sewage's centralized processing.
A centralized sewage treatment system suitable for rural areas comprises a pretreatment module, a biological rotating disc module, an artificial wetland module and a photovoltaic power generation module, sewage is discharged after passing through the pretreatment module, the biological rotating disc module and the artificial wetland module, and the photovoltaic power generation module provides electric energy for the biological rotating disc module and the pretreatment module.
The pretreatment module comprises a grid, a sewage lifting pump and a multi-stage sedimentation tank, wherein the sewage lifting pump lifts sewage in the sedimentation tank to the biological rotating disc module;
the artificial wetland module is an underflow artificial wetland, the underflow artificial wetland comprises a water inlet channel, a multi-stage wetland treatment unit and a water outlet channel, the sewage treated by the biological rotating disc module is uniformly distributed to the wetland treatment unit through the water inlet channel, and the sewage treated by the wetland treatment unit is discharged through a water discharge channel;
the multistage wetland treatment units are arranged in a ladder manner from high to low in topography, each wetland treatment unit is surrounded by a reinforced concrete wall, the height of the reinforced concrete wall is 1-1.5 m, and the height of fillers in the wetland treatment units is the same as that of the reinforced concrete wall; water distribution perforated pipes are arranged on the reinforced concrete wall body 0.3 to 0.5 meter away from the bottom of the tank at intervals of 0.5 meter;
the filler of the wetland treatment unit is distributed from bottom to top as follows: the soil-compacting layer comprises a plain soil compacting layer, geotextiles, a fine sand layer of 0.1 to 0.2 meter, a gravel layer of 0.2 to 0.4 meter with the diameter of 5 to 12 centimeters, a gravel layer of 0.3 to 0.5 meter with the diameter of 1 to 3 centimeters, non-woven fabrics and a soil layer of 0.1 to 0.4 meter;
aquatic plants are planted in the wetland treatment unit, emergent aquatic plants are planted at the positions with higher terrain and lower terrain, native floating-leaf plants are planted close to the ditches, and submerged plants are planted at the deeper part of the water depth.
Further, the aspect ratio of the wetland treatment unit is less than or equal to 3 to 1.
Furthermore, the water inlet channel and the water outlet channel adopt a semi-underground steel-concrete structure.
Furthermore, 600g/m < 2 > HDPE impermeable cloth is paved at the bottom of the wetland treatment unit and on the inner side of the reinforced concrete wall.
Further, the emergent aquatic plants with higher topography comprise arundo donax linn and reed; emergent aquatic plants with low topography include Phragmites communis and Typha orientalis L.
Technical scheme's beneficial effect lies in: the technical defect that a traditional modular sewage treatment system cannot be accurately implemented due to unclear technical details is overcome, and the technical scheme has the characteristics of low cost operation, simplicity in operation and maintenance and the like and has good economic benefits; as an ecological sewage treatment plant, the method solves the problem of sewage treatment under the condition of zero input of energy, recycles the treated effluent to form a circulating ecological system, has landscape effect and has higher social benefit and environmental benefit.
Drawings
FIG. 1 is a schematic view of a centralized sewage treatment system suitable for rural areas.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to specific examples.
As described in the background art, the existing modular sewage treatment system only expresses the structural composition of the sewage treatment system, and does not provide a specific structural design, particularly a specific layout of the artificial wetland, and the design of the layout directly influences various indexes of final drainage and economic performance-price ratio. Therefore, the prior art has the common technical defect that the prior art has no practicability.
Aiming at the defects in the prior art, the invention aims to provide an ecological water magic cube sewage treatment system with a detailed structural design.
As shown in fig. 1, a centralized sewage treatment system suitable for rural areas comprises a pretreatment module, a biological rotating disc module, an artificial wetland module and a photovoltaic power generation module, wherein sewage is discharged after passing through the pretreatment module, the biological rotating disc module and the artificial wetland module, and the photovoltaic power generation module provides electric energy for the biological rotating disc module and the pretreatment module.
The pretreatment module carries out primary treatment on sewage, and the structure and equipment of the module mainly comprise a grating, a sewage lifting pump and a sedimentation tank. The removal objects in the pretreatment stage are mainly solid suspended substances SS (more than 40-55 percent can be removed) and partial BOD5 (20-30 percent, mainly suspended BOD 5) so as to reduce the water inlet load of a subsequent biological treatment structure.
The biological rotating disc module is used for carrying out secondary biochemical treatment on the sewage by utilizing a biological rotating disc technology. The biological rotating disk process is one of biological sewage treating technologies by a biological membrane method, and has higher volume load (reaching 3.0-6.0kgBOD5/m 3. d); the principle of the biofilm method is: the biomembrane firstly adsorbs organic matters attached to the water layer, the organic matters are decomposed by aerobic bacteria of the aerobic layer and enter the anaerobic layer for anaerobic decomposition, the aged biomembrane is washed away by the flowing water layer to grow a new biomembrane, and the steps are repeated in this way to achieve the aim of purifying sewage. The biological rotating disc does not need aeration and backflow, the power consumption is low, and the operation cost is low; the sludge yield is low, the sludge bulking problem is avoided, and the operation management is simple; has strong adaptability to the fluctuation of water quantity and water quality.
The artificial wetland module is mainly used for carrying out three-stage treatment on the sewage subjected to the secondary biochemical treatment of the biological rotating disc, and deeply purifying the sewage by utilizing the principle of substance regeneration and circulation in an ecological system. The constructed wetland mainly comprises plants, a substrate and microorganisms, and the action mechanism is that the efficient purification of the sewage is realized through substrate filtration, adsorption, precipitation, ion exchange, plant absorption, microorganism decomposition and the like. Most organic matters in the wastewater are taken as nutrients of microorganisms, the removal rate of the organic matters of the artificial wetland is 50-90 percent, the removal rate of BOD5 is 85-95 percent, the removal rate of COD is more than 80 percent, and the removal rate of nitrogen and phosphorus in the water is higher. The artificial wetland has the advantages of low investment, low operation cost, no energy consumption, good treatment effect, capability of being used as an ecological landscape, and high ecological value, economic value and social benefit.
The photovoltaic power generation module is used for inputting power for operation of the sewage treatment system, converting sunlight radiation energy into electric energy through a solar cell, and providing appropriate direct current or alternating current electric energy for a load through links such as energy storage, energy conversion control and the like.
The pretreatment module comprises a grid, a sewage lifting pump and a multi-stage sedimentation tank, wherein the sewage lifting pump lifts sewage in the sedimentation tank to the biological rotating disc module;
the artificial wetland module is an underflow artificial wetland, the underflow artificial wetland comprises a water inlet channel, a multi-stage wetland treatment unit and a water outlet channel, the sewage treated by the biological rotating disc module is uniformly distributed to the wetland treatment unit through the water inlet channel, and the sewage treated by the wetland treatment unit is discharged through a water discharge channel;
the multistage wetland treatment units are arranged in a ladder manner from high to low in topography, each wetland treatment unit is surrounded by a reinforced concrete wall, the height of the reinforced concrete wall is 1-1.5 m, and the height of fillers in the wetland treatment units is the same as that of the reinforced concrete wall; water distribution perforated pipes are arranged on the reinforced concrete wall body 0.3 to 0.5 meter away from the bottom of the tank at intervals of 0.5 meter;
the filler of the wetland treatment unit is distributed from bottom to top as follows: the soil-compacting layer comprises a plain soil compacting layer, geotextiles, a fine sand layer of 0.1 to 0.2 meter, a gravel layer of 0.2 to 0.4 meter with the diameter of 5 to 12 centimeters, a gravel layer of 0.3 to 0.5 meter with the diameter of 1 to 3 centimeters, non-woven fabrics and a soil layer of 0.1 to 0.4 meter;
aquatic plants are planted in the wetland treatment unit, emergent aquatic plants are planted at the positions with higher terrain and lower terrain, native floating-leaf plants are planted close to the ditches, and submerged plants are planted at the deeper part of the water depth.
In order to better treat the sewage, the length-width ratio of the wetland treatment unit is less than or equal to 3 to 1; the water inlet channel and the water outlet channel adopt a semi-underground steel-concrete structure; 600g/m is paved at the bottom of the wetland treatment unit and at the inner side of the reinforced concrete wall2The HDPE barrier fabric of (1); the emergent aquatic plants with higher topography comprise Arundo donax and Phragmites communis; emergent aquatic plants with low topography include Phragmites communis and Typha orientalis L.
The applicant needs to say that the bio-disc module and the photovoltaic power generation module related in the technical scheme are existing general technologies, and can be directly mounted and applied by directly purchasing mature products, so that the technical scheme is not further described.
The above detailed description is made on the centralized sewage treatment system applicable to rural areas, and the embodiment is applied to explain the principle and the implementation mode of the application, and the description of the above embodiment is only used to help understand the method and the core idea of the application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (5)
1. A centralized sewage treatment system suitable for rural areas comprises a pretreatment module, a biological rotating disc module, an artificial wetland module and a photovoltaic power generation module, wherein sewage is discharged after passing through the pretreatment module, the biological rotating disc module and the artificial wetland module;
the pretreatment module comprises a grid, a sewage lifting pump and a multi-stage sedimentation tank, wherein the sewage lifting pump lifts sewage in the sedimentation tank to the biological rotating disc module;
the method is characterized in that:
the artificial wetland module is an underflow artificial wetland, the underflow artificial wetland comprises a water inlet channel, a multi-stage wetland treatment unit and a water outlet channel, the sewage treated by the biological rotating disc module is uniformly distributed to the wetland treatment unit through the water inlet channel, and the sewage treated by the wetland treatment unit is discharged through a water discharge channel;
the multistage wetland treatment units are arranged in a ladder manner from high to low in topography, each wetland treatment unit is surrounded by a reinforced concrete wall, the height of the reinforced concrete wall is 1-1.5 m, and the height of fillers in the wetland treatment units is the same as that of the reinforced concrete wall; water distribution perforated pipes are arranged on the reinforced concrete wall body 0.3 to 0.5 meter away from the bottom of the tank at intervals of 0.5 meter;
the filler of the wetland treatment unit is distributed from bottom to top as follows: the soil-compacting layer comprises a plain soil compacting layer, geotextiles, a fine sand layer of 0.1 to 0.2 meter, a gravel layer of 0.2 to 0.4 meter with the diameter of 5 to 12 centimeters, a gravel layer of 0.3 to 0.5 meter with the diameter of 1 to 3 centimeters, non-woven fabrics and a soil layer of 0.1 to 0.4 meter;
aquatic plants are planted in the wetland treatment unit, emergent aquatic plants are planted at the positions with higher terrain and lower terrain, native floating-leaf plants are planted close to the ditches, and submerged plants are planted at the deeper part of the water depth.
2. The centralized sewage treatment system applicable to rural areas according to claim 1, wherein: the aspect ratio of the wetland treatment unit is less than or equal to 3 to 1.
3. The centralized sewage treatment system applicable to rural areas according to claim 1, wherein: the water inlet channel and the water outlet channel are of a semi-underground steel-concrete structure.
4. The centralized sewage treatment system applicable to rural areas according to claim 1, wherein: 600g/m is paved at the bottom of the wetland treatment unit and at the inner side of the reinforced concrete wall2The HDPE impermeable cloth.
5. The centralized sewage treatment system applicable to rural areas according to claim 1, wherein: the emergent aquatic plants with higher topography comprise Arundo donax and Phragmites communis; emergent aquatic plants with low topography include Phragmites communis and Typha orientalis L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922077896.4U CN211521945U (en) | 2019-11-27 | 2019-11-27 | Centralized sewage treatment system suitable for rural areas |
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| CN201922077896.4U CN211521945U (en) | 2019-11-27 | 2019-11-27 | Centralized sewage treatment system suitable for rural areas |
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