[0024]The embodiments of the present application are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals indicate the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to explain the application, but should not be understood as a limitation to the application.
[0025]The following describes the lake external sewage purification system according to the embodiment of the present application with reference to the drawings.
[0026]figure 1 It is a schematic structural diagram of a lake external sewage purification system according to an embodiment disclosed in this application.
[0027]Such asfigure 1 As shown, the lake external sewage purification system 100 in this embodiment includes: a first interception part 10, an interception pipe 20, a sewage treatment part 30, and a discharge pipe 40.
[0028]The first intercepting part 10 is used to intercept sewage flowing in from the sewage pipe 50 (not shown in the figure). The input end of the first intercepting part 10 is connected with the output end of the sewage pipe 50, and the output end is connected with the input end of the intercepting pipe 20.
[0029]It should be noted that the domestic sewage can flow into the first intercepting part 10 through the sewage pipe 50. Optionally, for the application scenario of rural domestic sewage discharge, the domestic sewage can be directly collected through the sewage pipe 50, and the rural domestic sewage collected through the sewage pipe 50 flows into the first intercepting part 10. Therefore, the lake external sewage purification system proposed in the present application is not only conducive to efficient collection of sewage, but also can reduce the number of pipes entering the lake external sewage purification system 100, and improve the effectiveness and efficiency of the sewage purification process.
[0030]It should be noted that in this application, the selection of the first intercepting portion 10 and the intercepting multiple are not limited, and can be set in advance according to actual conditions. Optionally, the first intercepting portion 10 can be set to be a first intercepting portion 10 of 1 to 3 times the intercepting multiple and adopting a prefabricated integrated plastic first intercepting portion 10.
[0031]The interception pipe 20 is used to collect high-load sewage, such as domestic sewage. Wherein, the input end of the intercepting pipe 20 is connected with the output end of the first intercepting part 10, and the output end is connected with the input end of the sewage treatment part 30.
[0032]For example, the interception pipe 20 can collect high-load domestic sewage, and the collected effluent flows to the input end of the sewage treatment part 30.
[0033]It should be noted that in this application, the selection of the interception pipe 20 is not limited, and it can be set in advance according to actual conditions. Optionally, the interception pipe 20 can be set as the interception pipe 20 using a high density polyethylene (High Density Polyethylene, HDPE for short) double-wall corrugated pipe.
[0034]The sewage treatment part 30 is used to purify the high-load sewage collected by the interception pipe 20. Wherein, the input end of the sewage treatment part 30 is connected with the output end of the interception pipe 20, and the output end is connected with the input end of the discharge pipe 40.
[0035]For example, the sewage treatment unit 30 may purify the high-load domestic sewage collected by the interception pipe 20, and the treated effluent flows to the input end of the discharge pipe 40.
[0036]It should be noted that the setup process of the sewage treatment department can be selected from Anaerobic/Oxic (A/O) biological contact oxidation process, and Anaerobic-Anoxic/Oxic (Anaerobic-Anoxic/Oxic, Abbreviated as A2/O) process based on the addition of hydrolysis acidification unit at the front end and combined with the pre-denitration-anaerobic-anoxia/aerobic-moving bed biofilm reactor (A3/O Moving Bed Biofilm Reactor, referred to as A3/O-MBBR) process and so on.
[0037]The discharge pipe 40 is used to discharge the effluent treated by the sewage treatment part 30. The input end of the discharge pipe 40 is connected to the output end of the sewage treatment part 30, and the output end is connected to the input end of the area where the purified water can be used.
[0038]For example, the discharge pipe 40 can discharge the effluent treated by the discharge sewage treatment part 30 into a nearby lake.
[0039]It should be noted that in this application, the selection of the discharge pipe 40 is not limited, and can be set in advance according to actual conditions. Optionally, the discharge pipe 40 may be a discharge pipe 40 using a polyethylene (PE) pipe.
[0040]Therefore, the lake external sewage purification system proposed in this application includes a first interception part, an interception pipeline, a sewage treatment part and a discharge pipeline. Optionally, the high-load sewage flowing in from the sewage pipe is intercepted by the first intercepting part, the intercepted effluent flows into the sewage treatment department through the interception pipe, and the sewage treatment department purifies the high-load sewage and controls the flow of the effluent. The discharge pipe is used for discharge. As a result, the system can efficiently collect and purify high-load domestic sewage, and recycle the purified water, which improves the effectiveness and efficiency of the sewage purification process, and improves the water environment in the drainage basin. Quality and effectiveness of water pollution control.
[0041]In some embodiments, in the lake external source sewage purification system 100, the first interception part 10 includes a plurality of first interception wells. For example, such asfigure 2 As shown, in the lake external source sewage purification system 100, the first interception part 10 includes a first interception well 11 and a first interception well 12, a total of two first interception wells, for the sewage flowing from the sewage pipe 50 Perform closure.
[0042]In some embodiments, such asfigure 2 As shown, in the lake external sewage purification system 100, the sewage treatment part 30 includes a sewage treatment station 31 and a sewage ecological treatment area 32.
[0043]The sewage treatment station 31 is used for primary purification treatment of the high-load sewage collected by the interception pipe 20, wherein the input end of the sewage treatment station 31 is connected with the output end of the interception pipe 20, and the output end is connected to the input of the sewage ecological treatment area 32 End connected. Optionally, the sewage treatment station 31 can perform biochemical reaction purification on the high-load sewage collected by the interception pipe 20.
[0044]It should be noted that in this application, the selection of the sewage treatment station 31 is not limited, and can be set in advance according to actual conditions. Optionally, the sewage treatment station 31 can be set as a sewage treatment station 31 that adopts a general rural domestic sewage treatment process, so that the water quality of the purified water can meet the "Urban Sewage Treatment Plant Pollutant Discharge Standard" (GB18918-2002 ) Level A standard. For example, the sewage treatment station 31 of the A/O biological contact oxidation process can be adopted.
[0045]The sewage ecological treatment area 32 is used for secondary purification treatment of low-load sewage (ie, micro-polluted water bodies), such as low-load sewage processed by the sewage treatment station 31. The input end of the sewage ecological treatment zone 32 is connected with the output end of the sewage treatment station 31, and the output end is connected with the input end of the discharge pipe 40. Optionally, the sewage ecological treatment zone 32 can biologically purify the low-load sewage after the primary purification treatment of the sewage treatment station 31 through the action of plants and microorganisms.
[0046]It should be noted that the sewage ecological treatment area 32 can be a sewage ecological treatment area 32 mainly composed of submerged plants and microorganisms and supplemented by emergent and floating leaf plants. The effluent water quality can meet the agricultural irrigation standards or the "Surface Water Environmental Quality" "(GB383-2002) Class V standard. Among them, the sewage ecological treatment zone 32 includes: slope protection, plant cultivation area enclosed by the slope protection, and anti-seepage bottom layer. Among them, grass planting areas include floating wetlands filled with ecological fillers. In this application, the selection of the slope protection, the planting area enclosed by the slope protection, and the anti-seepage bottom layer is not limited, and can be preset according to actual conditions.
[0047]Optionally, the sewage ecological treatment zone 32 may be provided with a slope protection using several rows of upright wooden piles with a diameter of 15-20 cm and a length of more than 1.5 m to form a bank protection skeleton. The wooden piles are exposed by 0.5 m and inserted into the side slope by 1 m. Fill the gaps of the wooden piles with boulders with a particle size of less than 20cm, and pave stones of different sizes from bottom to shore; the backfill area of the dumped stones can be cut with local aquatic plant species that are easy to survive; and the bottom with gravel size 20-40cm as the foundation, cover gravel layer, gravel layer and soil, and plant dwarf aquatic plants.
[0048]In this application, the selection of slope protection, pond bottom and pond body is not limited, and can be set in advance according to actual conditions. Optionally, the slope protection can be a slope protection covered with a water lawn on an ecological gabion; the bottom of the pond is made of a geotextile as an impermeable layer, a 100mm thick gravel cushion is used as the foundation, and a pond bottom covered with graded gravel and soil , And the depth of the bottom of the pond can be less than 2m; the pond body is divided into an over-water part and an underwater part, in which the over-water part of the pond is mainly arranged with water planting reeds and other emergent plants, and the underwater part is equipped with a floating wet area with ecological filling.
[0049]In some embodiments, such asfigure 2 As shown, in the lake external source sewage purification system 100, the discharge pipe 40 includes two discharge pipes, such as a discharge pipe 41 and a discharge pipe 42, for discharging the effluent treated by the sewage treatment unit 30.
[0050]As a possible implementation manner, the input end of the discharge pipe 41 can be connected to the output end of the sewage treatment part 30, and the output end is connected to the input end of the irrigation channel 60 (not shown in the figure) in the farmland for connecting The effluent purified by the sewage treatment unit 30 is discharged into the irrigation canal to irrigate farmland and realize the recycling of domestic sewage; the input end of the discharge pipe 42 is connected with the output end of the sewage treatment unit 30, and the output end is connected to nearby waters. Discharge the treated effluent water that meets the standard into nearby waters to avoid water pollution in the discharge area. The nearby waters may include nearby streams, lakes, etc.
[0051]Therefore, in the lake external sewage purification system proposed in this application, the sewage treatment department purifies the high-load domestic sewage through the sewage treatment station and the sewage ecological treatment zone to obtain effluent water of up to standard water quality. Furthermore, the purified effluent flows into the discharge pipeline, and flows into the farmland and nearby waters through the discharge pipeline, realizing the recycling of domestic sewage. Not only does it not need to rebuild the slope of a large area of the lake, it reduces the cost, but it can also reduce the cost. The effluent that meets the water quality standard is discharged into the nearby waters to avoid pollution of the water quality in the discharge area, ensure the water environment quality of the waters, and further improve the water environment quality in the nearby waters and the effect of water pollution control.
[0052]It should be noted that for rural areas and similar areas, surface runoff from farmland is usually discharged into nearby waters in a direct way. Since surface runoff has not been purified, it will inevitably lead to a decline in water quality in nearby waters and cause water pollution. Therefore, in the lake external sewage purification system proposed in this application, by adding a second interception part and an ecological circulation ditch, the interception pipeline and the ecological circulation ditch are coupled, and the high-load and low-load sewage entering the system are intercepted in stages. Realize the classified collection and targeted purification of sewage.
[0053]In some embodiments, such asimage 3 As shown, the lake external source sewage purification system 100 further includes: a second interception part 80 and an ecological circulation ditch 90.
[0054]The second intercepting part 80 is used for intercepting low-load sewage (ie, slightly polluted water), such as rainwater. The input end of the second intercepting part 80 is connected with the output end of the sewage pipe 50, and the output end is connected with the input end of the ecological circulation ditch 90.
[0055]Optionally, the second intercepting portion 80 includes two second intercepting wells, such as a second intercepting well 81 and a second intercepting well 82, which are used to intercept low-load sewage flowing in different areas, such as the water discharged from the sewage pipe 50, Water effluent from irrigation channels in farmland, etc.
[0056]As a possible implementation, the input end of the second intercepting well 81 can be connected to the output end of the sewage pipe 50, and the output end is connected to the input end of the ecological circulation ditch 90, so as to flow low-load sewage into the ecological circulation ditch. 90 for purification; the input end of the second intercepting well 82 is connected to the output end of the irrigation channel 60 in the farmland, so as to flow the surface runoff formed by the rainfall in the farmland into the ecological circulation ditch 90 for purification.
[0057]It should be noted that in the present application, the selection of at least one second intercepting well in the second intercepting portion 80 and the intercepting multiple are not limited, and can be preset according to actual conditions. Optionally, the second intercepting portion 80 can be set as the second intercepting well 81 and the second intercepting well 82 that have an interception multiple of 1 to 3 times and are constructed of bricks.
[0058]The ecological circulation ditches 90 are used to collect low-load sewage. Wherein, the input end of the ecological circulation ditch 90 is connected with the output end of the second intercepting part 80, and the output end is connected with the input end of the sewage treatment part 30.
[0059]It should be noted that the ecological circulation ditch 90 is paved with gravel, gravel, pebbles, zeolite, gravel, soil, etc., and aquatic plants can be optionally planted. Optionally, the output end of the ecological circulation ditch 90 is connected to the input end of the sewage ecological treatment area 32 in the sewage treatment part 30, so as to purify the effluent treated by the sewage treatment part 30 again, and drop the atmospheric precipitation onto the farmland. Surface runoff formed in the process of purification.
[0060]It should be noted that in this application, the selection of the ecological circulation pipe 90 is not limited, and it can be set in advance according to actual conditions.
[0061]Optionally, the ecological circulation pipeline 90 may be provided with a slope protection, and several rows of upright wooden piles with a diameter of 15-20 cm and a length of more than 1.5 m are used to form a bank protection skeleton. The wooden piles are exposed by 0.5 m and inserted into the side slope by 1 m. Fill the gaps of the wooden piles with boulders with a particle size of less than 20cm, and pave stones of different sizes from bottom to shore; the backfill area of the dumped stones can be cut with local aquatic plant species that are easy to survive; and the bottom with gravel size 20-40cm as the foundation, cover gravel layer, gravel layer and soil, and plant dwarf aquatic plants.
[0062]As a result, the lake external sewage purification system proposed in this application, through the classified collection and treatment of high-load and low-load sewage, makes the high-load sewage enter the sewage treatment station for biochemical purification, and makes the low-load sewage enter the sewage ecological treatment The district carries out ecological purification. At the same time, the sewage treatment station is coupled with the sewage ecological treatment area, and the tail water of the sewage treatment station is discharged into the sewage ecological treatment area for further deep purification, ensuring that the system effluent water quality reaches the standard, and can be used for farmland recharge to realize the recycling of water resources, or it can be directly discharged Enter the nearby waters to improve the overall water environment quality of the basin and the effect of water pollution control.
[0063]It should be noted that different seasons often lead to great differences in the sewage load that needs to be purified. Especially, for rural areas and similar areas, the sewage is often only high-load domestic sewage during the dry season. In the rainy season, sewage includes high Load low-load sewage such as domestic sewage and rainwater. Therefore, the lake external sewage purification system proposed in this application can efficiently collect and purify sewage according to different seasons to ensure the sewage purification effect.
[0064]Figure 4 This is a schematic structural diagram of a lake external sewage purification system disclosed in another embodiment of this application.
[0065]The following is an explanation of the lake external sewage purification system 100 proposed in this application for two different application scenarios in the dry season and the rainy season.
[0066]For the dry season application scenario, the high-load domestic sewage of village residents enters the interception pipe 20 through the sewage pipe 50 through the first interception well 11 and the first interception well 12, and the high-load sewage collected after interception enters the sewage treatment department 30 and passes through The sewage treatment station 31 performs biochemical reaction purification, and the tail water enters the sewage ecological treatment area 32 for biological purification, and then enters the irrigation channel 60 in the nearby farmland through the discharge pipe 41 for farmland irrigation, and passes through the waters near the discharge pipe 42.
