CN104692598B - Ecological treatment device for supplying recycled water to landscape water - Google Patents

Abstract

The invention relates to an ecological treatment device for replenishing landscape water with regenerated water, comprising a pretreatment pool, an anaerobic biological pool, an artificial underflow wetland, a biofilter and a landscape pool, the anaerobic biological pool is connected to the pretreatment pool, and the anaerobic biological pool is connected to the pretreatment pool. There is an overflow weir between the treatment tanks, and an overflow hole is provided on the overflow weir. The effluent of the anaerobic pool of the anaerobic biological pool is connected with the wetland water inlet of the artificial subsurface flow wetland. The wetland effluent of the wetland is connected to the biofilter inlet of the biofilter, and the biofilter effluent of the biofilter is connected to the landscape pool, which is set in the center or low-lying place of the residential area. The invention treats domestic sewage in urban residential quarters into water for landscape entertainment. The device is arranged according to the topography of the residential quarters, and is easy to construct and manage. It does not need power facilities during operation, is energy-saving and environmentally friendly, and ensures efficient operation of the wetland system. It not only saves resources, but also beautifies the environment. .

Description

An ecological treatment device for replenishing landscape water with recycled water

technical field

The invention relates to the technical field of environmental engineering, in particular to the field of artificial wetland ecological treatment, and in particular to an ecological treatment device for replenishing landscape water with recycled water.

Background technique

China is a country seriously short of water resources, and there are problems of lack of fresh water resources and increasingly serious water pollution. According to the 2011 national document, tap water is not allowed to be used for landscape water replenishment in residential areas. In recent years, many cities at home and abroad have purified sewage and reused landscape water for entertainment, which not only saves fresh water resources, but also beautifies the environment.

Landscape water replenishment and restoration technologies mainly include biofilm treatment technology, ecological bed technology, artificial wetland treatment technology, aquatic animal and plant restoration technology, aeration and oxygen enhancement technology, and chemical injection technology. The existing technology is generally aimed at the prevention and control of eutrophication of natural water bodies or the treatment of polluted water bodies, without considering the factors of water supply, such as the difference between the water quality of reclaimed water and the water quality of landscape water bodies—mainly the indicators of ammonia nitrogen and total phosphorus, And the specific functional orientation of the landscape water body and other factors. As an effective mode of sewage treatment, constructed wetland treatment technology is prone to silting, which greatly affects the operating efficiency of constructed wetlands.

Contents of the invention

The purpose of the present invention is to provide an ecological treatment device that has no power in the whole process, saves resources and beautifies the environment, realizes the coordination between resources and the environment, and regenerates water to replenish landscape water without silting.

The technical solution adopted by the present invention to solve its technical problems is: an ecological treatment device for reclaimed water supply landscape water, including a pretreatment pool, anaerobic biological pool, artificial subsurface flow wetland, biological filter pool and landscape pool, the pretreatment pool Close to the building drainage system of the residential area, the anaerobic biological pool is connected to the pretreatment pool, an overflow weir is provided between the anaerobic biological pool and the pretreatment pool, and an overflow hole is provided on the overflow weir, and the anaerobic biological pool The outlet water of the anaerobic pool is connected with the wetland water inlet of the artificial subsurface flow wetland. The pool is set under the pavement of the residential area, and the biofilter effluent of the biological filter is connected with the landscape pool, and the landscape pool is set in the center or low-lying place of the residential area.

Specifically, the upper part of the pretreatment tank is provided with sewage water inlet, and the pretreatment tank is provided with a basket fine grid and a supporting bucket, and the basket fine grid is hung on the supporting bucket, and the supporting bucket is supported by the barrel edge and the supporting bucket. The supporting point is supported, and the bottom plate of the supporting bucket is a movable hole-shaped supporting plate with a bayonet, and a filter membrane is pasted on the supporting plate.

Specifically, the inlet water of the wetland is connected to one end of the artificial subsurface flow wetland through a regulating tank, and the other end of the artificial subsurface flow wetland is connected to the outlet water of the wetland through a sump.

Specifically, the artificial subsurface wetland is one or several groups of strip-shaped flower ponds, the inner wall of which is waterproofed, and the two ends are filled with pebbles and vermiculite filter material layers from the outside to the inside. The bottom of the artificial subsurface wetland is filled with a substrate, and the substrate Wetland plants are planted, and the substrate is peat soil, plant debris, and ceramsite from bottom to top.

Specifically, a plurality of folded plates are arranged vertically in the matrix, and wetland plants are planted between the folded plates.

Specifically, a transparent plastic shed or a wisteria trellis is set above the artificial subsurface wetland.

Specifically, the biofilter is filled with porous corrugated plates.

Specifically, aquatic organisms are cultivated in the landscape pool.

The present invention has the following beneficial effects:

1. The present invention treats domestic sewage in urban residential quarters into water for landscape entertainment. The device is arranged according to the topography of the residential quarters, easy to construct and manage, and does not need power facilities during operation. It is energy-saving and environmentally friendly, and ensures the efficient operation of the wetland system. Beautify the environment, realize the coordination between resources and the environment, and can also be used for large-scale community artificial lakes.

2. According to the characteristics of the climate, the present invention selects wetland plants and wetland operation modes, and arranges them rationally. A wisteria frame is erected above the artificial subsurface wetland for sun protection in summer, and a closed transparent plastic shed is erected for heat preservation in winter. This design can reduce summer exposure and winter exposure. The impact of low temperature on the growth of wetland plants and the effect of wetland treatment ensures that the effluent meets the water standard for landscape entertainment and beautifies the living environment.

3. The present invention adopts filter membrane (such as filter paper, etc.) to fully pretreat sewage, supplemented by vermiculite filter material and ceramsite matrix, which can effectively alleviate the silt problem that is easy to occur in artificial wetland; in addition, filter membrane can intercept suspended matter, solid Particles and some refractory organic macromolecule micelles greatly reduce the load of anaerobic acid hydrolysis in anaerobic biological pools.

Description of drawings

Fig. 1 is a schematic diagram of the overall structure of the ecological treatment device of the present invention.

Fig. 2 is a schematic diagram of the artificial subsurface flow wetland of the present invention in winter.

Fig. 3 is a schematic diagram of the artificial subsurface flow wetland of the present invention in summer.

In the figure, 1. Sewage inlet, 2. Basket fine grid, 3. Filter membrane, 4. Support bucket, 5. Support plate, 6. Support point, 7. Pretreatment tank, 8. Overflow weir , 9, overflow hole, 10, anaerobic biological pond, 11, anaerobic pond effluent, 12, wetland water inflow, 13, regulating pond, 14, pebble, 15, vermiculite, 16, peat soil, 17, folding plate , 18. Artificial subsurface flow wetland, 19. Wetland plants, 20. Plant debris, 21. Ceramsite, 22. Pool, 23. Wetland effluent, 24. Biofilter effluent, 25. Biofilter effluent, 26. Porous corrugated board, 27, biofilter, 28, aquatic organisms, 29, landscape pool, 30, transparent plastic shed, 31, wisteria frame.

detailed description

The following are specific examples of the present invention, further describing the technical solutions of the present invention, but the protection scope of the present invention is not limited to these examples. All changes or equivalent substitutions that do not depart from the concept of the present invention are included in the protection scope of the present invention.

As shown in Figure 1, an ecological treatment device for reclaimed water replenishment landscape water, the whole set of device is located below the ground, including a pretreatment pool 7, anaerobic biological pool 10, artificial subsurface flow wetland 18, biofilter 27 and landscape pool 29. Said pretreatment pond 7 is close to the building drainage system of the residential area, and said anaerobic biological pond 10 is connected with pretreatment pond 7, and overflow weir 8 is arranged between anaerobic biological pond 10 and pretreatment pond 7, and overflow weir 8 is provided with There is an overflow hole 9, and the anaerobic pool effluent 11 of the anaerobic biological pool 10 is connected with the wetland water inlet 12 of the artificial subsurface flow wetland 18. The wetland effluent 23 of the biofilter 27 is connected with the biofilter inflow 24 of the biofilter 27, and the biofilter 27 is arranged under the road surface of the residential area, and the biofilter effluent 25 of the biofilter 27 is connected with the landscape pool 29, so The landscape pool 29 is arranged in the center of the residential area or in a low-lying place.

Specifically, the upper part of the pretreatment pool 7 is provided with a sewage inlet 1, and the pretreatment pool 7 is provided with a basket fine grid 2 and a supporting bucket 4, and the basket fine grid 2 is hung on the supporting bucket 4. The supporting barrel 4 is supported by the edge of the barrel and supporting points 6. The bottom plate of the supporting barrel 4 is a movable hole-shaped supporting plate 5 with a bayonet, and a filter membrane 3 is pasted on the supporting plate 5.

Specifically, the wetland water inlet 12 is connected to one end of the artificial subsurface flow wetland 18 through the regulating pool 13 , and the other end of the artificial subsurface flow wetland 18 is connected to the wetland outlet water 23 through the sump 22 .

Specifically, the artificial subsurface wetland 18 is a group or several groups of strip-shaped flower ponds, the inner walls of which are waterproofed, and the two ends are filled with pebbles 14 and vermiculite 15 filter material layers from the outside to the inside, and the bottom of the artificial subsurface wetland 18 is filled with Substrate, wetland plants 19 are planted in the substrate, and the substrate includes peat soil 16, plant debris 20, and ceramsite 21 from bottom to top.

Specifically, a plurality of folded plates 17 are vertically arranged in the matrix, and wetland plants 19 are planted between the folded plates 17 .

During operation, the sewage influent 1 is filtered by the basket fine grid 2 and the filter membrane 3 and enters the pretreatment tank 7, and the sewage is filtered by the filter membrane 3, which can remove more than 30% of organic pollutants, suspended solids, solid particles and Part of the macromolecule micelles cannot pass through the filter membrane 3 , effectively alleviating the silting of the wetland 18 and greatly reducing the degradation load of the anaerobic biological pool 10 .

The filtered water enters the anaerobic biological pool 10 through the overflow weir 8. The temperature in the pool is relatively constant and is not easily affected by external air and temperature fluctuations. It provides a good breeding place for anaerobic bacteria, facultative bacteria and ammonifying bacteria. In the anaerobic biological pool 10, the sewage is subjected to sufficient anaerobic hydrolysis and acidification, wherein the high-molecular organic matter that is difficult to degrade can basically be completely converted into low-molecular organic matter that is easily degradable, and the ratio of BOD/COD in the sewage is increased, which is beneficial to wetlands. Uptake and degradation in plants 19.

The effluent 11 of the anaerobic biological pool enters the artificial subsurface flow wetland 18 through the regulating pool 13. Different substrates are beneficial to the survival of different types of microorganisms. The vermiculite 15 and ceramsite 21 can also effectively relieve the silting of the wetland 18. Among them, 16 layers of peat soil are covered with plant fibrous roots, 20 thin layers of plant debris are sandwiched in the middle, and 21 layers of ceramsite are covered on the upper part. Wetland plants Plant irises in front of the 19th floor or in the sunny place, and plant windmill grass on the roadside or in the shade. Evergreen aquatic iris has strong cold resistance and strong metabolism. Even in winter, it can also play a role in absorbing water pollutants; and after the sewage stays in the wetland where windmill grass is planted for 10 days, TN, TP, COD and BOD in the sewage are removed The rate can reach 70-90%. In addition to the direct absorption of pollutants, wetland plants 19 also have an important indirect role: transport oxygen from the upper part to the plant roots, thereby forming an aerobic environment in the plant roots. Anoxic and anaerobic conditions, such conditions are conducive to the growth of nitrifying bacteria and denitrifying bacteria, thereby enhancing the nitrification and denitrification of wetland microorganisms, and improving the purification efficiency of N in sewage. Artificial subsurface wetland 18 also has a good removal effect on P, which mainly depends on the joint action of plant absorption, matrix adsorption and filtration, and microbial transformation. The microorganisms in the artificial subsurface wetland 18 can also eliminate the peculiar smell of sewage. The operating mode of the artificial subsurface flow wetland 18 is designed as a vertical baffle wetland, that is, the folded plate 17 is added inside the wetland to make the flow process longer and the flow state more uniform, thereby increasing the hydraulic retention time and increasing the pollutants in the wetland. Filling, plant roots and The contact time of the biofilm makes the physical, chemical and biological reactions required for the removal of pollutants more fully carried out, and the removal rate of pollutants is significantly higher than that of ordinary wetlands. Wetland replenishment can be done intermittently according to the actual situation. A wisteria trellis 31 is set above the artificial subsurface wetland 18 for sun protection in summer, and the effect is shown in FIG. This design can reduce the impact of exposure to sunlight in summer and low temperature in winter on the growth of wetland plants 19 and further on the wetland treatment effect, ensure that the effluent water meets the water standard for landscape entertainment, and beautify the living environment at the same time.

The wetland effluent 23 flows into the biological filter 27 under the road surface of the residential area. The biological filter 27 is shaped like a drainage ditch, and the porous corrugated plate 26 is used as a filler. The porous corrugated plate 26 not only maintains a certain porosity, but also ensures the attachment and growth of microorganisms. , greatly improving the degradation ability of dissolved substances, suspended substances and chemical and biological oxygen-consuming substances.

The biological filter effluent 25 flows into the landscape pool 29, and the device effluent reaches the landscape entertainment water standard. Aquatic organisms 28 can be cultivated in the landscape pool 29 to prevent mosquitoes from breeding in summer.

Claims (8)

1. An ecological treatment device for regenerated water replenishment landscape water, characterized in that it comprises a pretreatment pond, anaerobic biological pond, artificial subsurface flow wetland, biofilter and landscape pond, and said pretreatment pond is close to the residential area building drainage system, The anaerobic biological pool is connected to the pretreatment pool, an overflow weir is provided between the anaerobic biological pool and the pretreatment pool, and an overflow hole is provided on the overflow weir, the anaerobic pool effluent of the anaerobic biological pool and the artificial underflow The wetland water inlet connection of the wetland, the artificial subsurface flow wetland is arranged around the buildings of the residential area, the wetland outlet water of the artificial subsurface flow wetland is connected with the biological filter water inlet of the biological filter, and the biological filter is arranged under the road surface of the residential area , the biofilter effluent of the biofilter is connected to the landscape pool, and the landscape pool is set in the center or low-lying place of the residential area; the upper part of the pretreatment pool is provided with sewage water, and the pretreatment pool is provided with a basket fine grid And the supporting bucket, the fine grid of the basket is hung on the supporting bucket, the supporting bucket is supported by the bucket edge and supporting points, the bottom plate of the supporting bucket is a movable hole-shaped supporting plate with a bayonet, A filter membrane is pasted on the support plate. 2. The ecological treatment device for replenishing landscape water with regenerated water according to claim 1, characterized in that, the wetland water intake is connected with one end of the artificial subsurface flow wetland through a regulating tank, and the other end of the artificial subsurface flow wetland is connected with the artificial subsurface flow wetland through a sump pool. Wetland outlet connection. 3. The ecological treatment device for replenishing landscape water with regenerated water according to claim 2, characterized in that, the artificial subsurface wetland is one group or several groups of strip flower ponds, the inner wall is waterproofed, and the two ends are filled with pebbles and For the vermiculite filter material layer, the bottom of the artificial subsurface wetland is filled with a matrix, and wetland plants are planted in the matrix, and the matrix is peat soil, plant debris, and ceramsite from bottom to top. 4 . The ecological treatment device for replenishing landscape water with reclaimed water according to claim 3 , wherein a plurality of folded plates are arranged vertically in the matrix, and wetland plants are planted between the folded plates. 5 . 5. The ecological treatment device for replenishing landscape water with reclaimed water according to any one of claims 2-4, characterized in that a transparent plastic shed or a wisteria trellis is set above the artificial subsurface wetland. 6. The ecological treatment device for replenishing landscape water with reclaimed water according to claim 3 or 4, characterized in that, said wetland plants are planted with irises in front of buildings or in sunny places, and windmills are planted in roadsides or shaded places. 7 . The ecological treatment device for replenishing landscape water with reclaimed water according to claim 1 , wherein the biofilter is filled with porous corrugated plates. 8 . 8 . The ecological treatment device for replenishing landscape water with reclaimed water according to claim 1 , wherein aquatic organisms are cultivated in the landscape pool.