Slope distributed ditch type sewage ecological treatment system

Abstract

The utility model relates to the technical field of water ecological treatment structures, in particular to a slope distributed ditch type sewage ecological treatment system. Comprising transverse ditches and longitudinal ditches, the transverse ditches are closed ditches which are formed in a slope in the horizontal direction and construct an anaerobic environment for sewage treatment, the transverse ditches are distributed at intervals in the slope direction, a water inlet is formed in the transverse ditch located at the highest position of the slope, and a water outlet is formed in the transverse ditch located at the lowest position of the slope; the longitudinal ditches are open ditches which are formed in the slope surface in the slope descending direction and are used for constructing an aerobic environment for sewage treatment, and the two ends of the longitudinal ditches are communicated with the adjacent transverse ditches respectively; and a plurality of longitudinal ditches are arranged between the adjacent transverse ditches. The treatment system is simple in structure, sewage left from the slope can be alternately treated in an anaerobic environment and an aerobic environment through the combined structure of the transverse ditches and the longitudinal ditches, the sewage treatment effect is greatly improved, the manufacturing cost is low, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of water ecological treatment structures, in particular to a slope-dispersed ditch-type sewage ecological treatment system. Background Art

[0002] Due to the topography and terrain restrictions in mountainous areas, the land resources available for the construction of sewage treatment plants are generally tight, and many projects are located on sloping land with steep terrain. Building a sewage treatment plant on a sloping land requires a lot of money for the construction of earthwork leveling, retaining walls, slope protection and other projects in the plant area. The foundation requirements for buildings are also high, and the project has a low cost-effectiveness. Moreover, as the country's control over farmland and forest land becomes increasingly strict, the construction of traditional sewage treatment plants is increasingly restricted by land. In addition, the economic conditions in mountainous areas are generally limited. If you want the sewage treatment system to operate stably and for a long time, you need to make maintenance and management simple and the operating costs low while ensuring the treatment effect.

[0003] At present, there is a Chinese invention patent with the patent number "CN201310328070.5" entitled "An Ecological Slope Protection Type Sewage Land Infiltration System and Its Infiltration Method" which proposes a sewage land infiltration system for slopes. Specifically, the system includes a grid pool, anaerobic hydrolysis and stepped land infiltration units arranged from top to bottom along the slope of the slope. The grid is connected to the ditch. The stepped land infiltration unit includes multi-level slope protection infiltration, the slope protection infiltration is filled with filter material, and the slope protection infiltration bed is cultivated with a wetland plant community. A modal conversion component for controlling the infiltration rate, hydraulic retention time, filter layer environment and water outlet mode is arranged between adjacent slope protection infiltration beds. The system can withstand the impact of rural sewage water quality and quantity, has strong reoxygenation capacity and is not easy to clog, strengthens the denitrification and phosphorus removal effect, is green, energy-saving, economically feasible, and has excellent water conservancy and ecological value.

[0004] However, the system also has some defects. The structure of the system is relatively complex and it occupies a large area of ​​the slope. It is necessary to build structures such as screen pools and anaerobic hydrolysis pools on the slope. The cost and construction difficulty are greatly increased. In fact, it is not suitable for large-scale promotion and use. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings of the above-mentioned background technology and provide a slope-dispersed ditch-type sewage ecological treatment system.

[0006] The technical solution of the utility model is: a slope-land decentralized ditch-type sewage ecological treatment system, comprising:

[0007] A transverse ditch is a closed channel opened in the horizontal direction on the slope to construct an anaerobic environment for sewage treatment. A plurality of transverse channels are distributed at intervals along the slope. A water inlet is provided on the transverse ditch at the highest point of the slope, and a water outlet is provided on the transverse ditch at the lowest point of the slope.

[0008] A longitudinal ditch is an open channel opened on the slope along the slope direction to create an aerobic environment for sewage treatment, and the two ends of the longitudinal ditch are respectively connected to the adjacent transverse ditches;

[0009] A plurality of longitudinal ditches are arranged between adjacent transverse ditches.

[0010] According to a slope-type decentralized ditch-type sewage ecological treatment system provided by the present application, a first impermeable membrane is laid on the bottom and sides of the transverse ditch; the first impermeable membrane is filled with filter material for filtering sewage flowing through the transverse ditch.

[0011] According to a slope-type decentralized ditch-type sewage ecological treatment system provided by the present application, a cover plate is laid on the transverse ditch; the cover plate includes a cover body covering the upper end of the transverse ditch; the lower end surface of the cover body is provided with a plurality of connecting plates arranged at intervals along the length direction of the transverse ditch; the upper end of the connecting plate is connected to the lower end surface of the cover body, and the lower end is fixed in the transverse ditch.

[0012] According to a slope-type decentralized ditch-type sewage ecological treatment system provided by the present application, a second impermeable membrane is laid on the bottom and sides of the longitudinal ditch; and blocks of stone are filled on the second impermeable membrane to increase the mixing effect of water flow and air.

[0013] According to a sloped decentralized ditch-type sewage ecological treatment system provided in the present application, the longitudinal ditch does not overlap with the adjacent longitudinal ditch in the slope direction.

[0014] The advantages of the present application are as follows: 1. The present application constructs a plurality of transverse ditches and longitudinal ditches on the slope surface. The transverse ditches are arranged in the horizontal direction. The sewage is subjected to anaerobic denitrification treatment when staying in the transverse ditches. The longitudinal ditches are arranged in the slope direction. The sewage is subjected to aerobic treatment in the longitudinal ditches. The alternating operation of the transverse ditches and the longitudinal ditches can form an alternation of anaerobic and aerobic environments, effectively improving the sewage treatment capacity, especially the denitrification capacity. In addition, the ecological water treatment structure of the present application is extremely simple, the construction cost is low, there is no need to construct a complex water treatment facility unit, and it will not occupy too much slope area, so it is suitable for large-scale promotion and application.

[0015] 2. The present application sets filter material in the transverse ditch, uses the filter material to filter and adsorb the sewage, further improving the sewage treatment effect. At the same time, the filter material can slow down the flow rate of water, increase the residence time of sewage in the transverse ditch, and enhance the effect of sewage denitrification treatment;

[0016] 3. In this application, a cover plate is laid on the transverse ditch, and the transverse ditch is closed by the cover plate to construct an anaerobic environment for the transverse ditch. The cover plate has a simple structure and is easy to operate in combination with the arrangement of the transverse ditch;

[0017] 4. In this application, stones are arranged in the longitudinal ditch. The longitudinal ditch has a large slope, a fast flow rate and a shallow depth. The stones are laid in the longitudinal ditch to improve the mixing effect of water flow and air, increase the dissolved oxygen in the water, and enhance the effect of aerobic treatment of sewage;

[0018] 5. The present application arranges the longitudinal ditches in a staggered manner in the slope direction to prevent sewage from entering the large transverse ditch from the longitudinal ditch and then entering the next longitudinal ditch without being fully distributed. This arrangement of the present application can make the sewage flow more evenly in the transverse and longitudinal ditches, so that the sewage can achieve a good treatment effect.

[0019] The treatment system of the present application has a simple structure and is suitable for slope locations. Through the combined structure of transverse ditches and longitudinal ditches, the sewage left from the slope can be treated in alternating anaerobic and aerobic environments, which greatly improves the effect of sewage treatment. At the same time, the treatment system of the present application has low cost, is easy to use, and has great promotion load. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 : Schematic diagram of the slope layout structure of the slope-land decentralized ditch-type sewage ecological treatment system of the present application;

[0021] Figure 2 : A cross-sectional view of a transverse trench of the present application;

[0022] Figure 3 : A longitudinal ditch cross-section of the present application;

[0023] Among them: 1—horizontal ditch; 2—longitudinal ditch; 3—first anti-seepage membrane; 4—filter material; 5—cover plate; 6—second anti-seepage membrane; 7—stone. DETAILED DESCRIPTION

[0024] The embodiments of the present invention are described in detail below, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] The utility model is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0028] The present application relates to a decentralized ditch-type sewage ecological treatment system for sloping land. The present application constructs a good sewage ecological treatment system on the sloping land surface by excavating horizontal ditches and vertical ditches on the sloping land surface, using the horizontal ditches to perform anaerobic denitrification treatment on the sewage, and using the vertical ditches to perform aerobic treatment on the sewage, so that the sewage can be subjected to alternating aerobic and anaerobic cycle treatment, and the whole treatment system has a simple structure, low cost, small occupied area, low construction difficulty, and has great promotion value.

[0029] Specifically, Figures 1 to 3 As shown, the slope decentralized ditch-type sewage ecological treatment system of the present application includes a transverse ditch 1 and a longitudinal ditch 2. The transverse ditch 1 is a closed channel opened on the slope surface in the horizontal direction to construct an anaerobic environment for sewage treatment. A plurality of transverse channels are distributed at intervals along the slope direction. A water inlet (such as Figure 1 In a), a water outlet (such as Figure 1 b); the longitudinal ditch 2 is an open channel opened on the slope along the slope direction to construct an aerobic environment for sewage treatment, and the two ends of the longitudinal ditch 2 are respectively connected to the adjacent transverse ditches 1; a plurality of longitudinal ditches 2 are arranged between adjacent transverse ditches 1.

[0030] During treatment, sewage enters the transverse ditch 1 at the highest point of the slope from the water inlet above the slope, and the sewage flows in the transverse ditch 1. The transverse ditch 1 distributes the sewage to multiple longitudinal ditches 2 connected to it, and then enters the next transverse ditch 1, and the process is repeated alternately until the sewage is discharged from the outlet on the transverse ditch 1 at the lowest point of the slope after being treated.

[0031] During the flow of sewage on the slope, the sewage is subjected to anaerobic denitrification treatment in the horizontal ditch 1, and the sewage is subjected to aerobic treatment in the vertical ditch 2, alternately forming a sewage treatment environment with alternating aerobic and anaerobic conditions, effectively improving the sewage treatment capacity, especially the denitrification capacity.

[0032] In some embodiments of the present application, the structure of the above-mentioned transverse trench 1 is optimized. Specifically, Figure 2 As shown, the bottom and side surfaces of the transverse ditch 1 of this embodiment are paved with a first impermeable membrane 3 , and the first impermeable membrane 3 is filled with filter material 4 for filtering sewage flowing through the transverse ditch 1 .

[0033] The transverse ditch 1 of this embodiment has a width of 1 to 2 m and a depth of 0.8 to 1.5 m, and is an earthen ditch. The first anti-seepage membrane 3 is two cloths and one membrane, which is laid at the bottom and both sides of the transverse ditch 1 to prevent sewage from penetrating into the slope soil. The filter material 4 is a volcanic rock filter material with a particle size of 10 to 30 mm and a filling thickness of 0.5 m to 1.0 m.

[0034] In addition, in order to construct an anaerobic environment in the transverse ditch 1, the embodiment Figure 2 As shown, in this embodiment, a cover plate 5 is laid on the transverse ditch 1. The cover plate 5 is a T-shaped structure. The cover plate 5 includes a cover body covering the upper end of the transverse ditch 1. The lower end surface of the cover body is provided with a plurality of connecting plates arranged at intervals along the length direction of the transverse ditch 1. The upper end of the connecting plate is connected to the lower end surface of the cover body, and the lower end is fixed in the transverse ditch 1. In fact, the lower end of the connecting plate is inserted into the filter material 4 for fixing. Sewage can flow between adjacent connecting plates.

[0035] The cover plate 5 is a glass fiber reinforced plastic or concrete cover plate, which completely covers the top of the transverse ditch 1 and has a bottom 10 to 15 cm higher than the bottom of the transverse ditch 1. In addition to the sealing function, it can also play a diversion role, so that the water from the upstream longitudinal ditch 2 can be diverted and discharged from the volcanic rock filter material 4, avoiding short-circuiting and improving the treatment effect of the volcanic rock filter material 3.

[0036] In other embodiments of the present application, the longitudinal trench 2 structure is optimized. Specifically, Figure 3 As shown, a second impermeable membrane 6 is laid on the bottom and sides of the longitudinal ditch 2, and blocks 7 are filled on the second impermeable membrane 6 to increase the mixing effect of water flow and air.

[0037] The longitudinal ditch 2 of this embodiment has a width of 0.5-0.8 m and a depth of 0.3-0.5 m, and is an earthen ditch.

[0038] The second anti-seepage membrane 6 of this embodiment is a two-layer fabric and one-layer membrane, which is laid at the bottom and both sides of the longitudinal ditch 2 to prevent sewage from penetrating into the slope soil.

[0039] The block stone 7 of this embodiment is limestone with a particle size of 10 mm to 20 mm, and the filling thickness is 8 cm to 10 cm.

[0040] In addition, the longitudinal ditch 2 of this embodiment does not overlap with the adjacent longitudinal ditch 2 in the slope direction, that is, from the slope direction, the adjacent longitudinal ditches 2 are staggered. This can prevent sewage from entering the large transverse ditch from the longitudinal ditch and then entering the next longitudinal ditch without being fully distributed.

[0041] When sewage is actually treated, sewage enters the transverse ditch 1 at the highest point of the slope from the water inlet above the slope, and the sewage flows in the transverse ditch 1. The cover plate 5 provides a closed environment for the transverse ditch 1, and an anaerobic environment is formed in the transverse ditch 1. The sewage flows between adjacent connecting plates, and the connecting plates form a baffle structure to make the flow of sewage in the transverse ditch more uniform. The sewage is fully in contact with the filter material 4 in the transverse ditch 1, and the filter material 4 performs filtering and adsorption operations on the sewage. The sewage is subjected to anaerobic denitrification treatment in the transverse ditch 1.

[0042] The transverse ditch 1 distributes the sewage to the multiple longitudinal ditches 2 connected thereto. The sewage flow rate in the longitudinal ditches 2 increases, and the sewage flows between the blocks of stone 7. The blocks of stone 7 increase the degree of mixing of the sewage flow with air, and the sewage is aerobically treated in the longitudinal ditches 2.

[0043] Then it enters the next transverse ditch 1, and the process is repeated alternately until the sewage is treated and discharged from the outlet on the transverse ditch 1 at the lowest point of the slope.

[0044] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A slope-land decentralized ditch-type sewage ecological treatment system, characterized by: include, A transverse ditch (1), wherein the transverse ditch (1) is a closed channel opened in the horizontal direction on the slope surface to construct an anaerobic environment for sewage treatment, wherein a plurality of transverse channels are spaced apart along the slope direction, wherein a water inlet is arranged on the transverse ditch (1) at the highest point of the slope surface, and a water outlet is arranged on the transverse ditch (1) at the lowest point of the slope surface; A longitudinal ditch (2), wherein the longitudinal ditch (2) is an open channel opened on the slope surface along the slope direction to construct an aerobic environment for sewage treatment, and the two ends of the longitudinal ditch (2) are respectively connected to the adjacent transverse ditch (1); A plurality of longitudinal grooves (2) are arranged between adjacent transverse grooves (1).

2. A slope-land decentralized ditch-type sewage ecological treatment system as claimed in claim 1, characterized in that: A first impermeable membrane (3) is laid on the bottom and side of the transverse ditch (1); and a filter material (4) for filtering sewage flowing through the transverse ditch (1) is filled on the first impermeable membrane (3).

3. A slope-land decentralized ditch-type sewage ecological treatment system as claimed in claim 1 or 2, characterized in that: A cover plate (5) is laid on the transverse ditch (1); the cover plate (5) comprises a cover body covering the upper end of the transverse ditch (1); a plurality of connecting plates arranged at intervals along the length direction of the transverse ditch (1) are provided on the lower end surface of the cover body; the upper end of the connecting plate is connected to the lower end surface of the cover body, and the lower end is fixed in the transverse ditch (1).

4. The slope-land decentralized ditch-type sewage ecological treatment system according to claim 1, characterized in that: The bottom and sides of the longitudinal ditch (2) are paved with a second impermeable membrane (6); the second impermeable membrane (6) is filled with stone blocks (7) for increasing the mixing effect of water flow and air.

5. The slope-land decentralized ditch-type sewage ecological treatment system according to claim 1, characterized in that: The longitudinal ditch (2) does not overlap with the adjacent longitudinal ditch (2) in the slope direction.

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