CN220788273U - Ecological type modularized sewage treatment device - Google Patents
Ecological type modularized sewage treatment device Download PDFInfo
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- CN220788273U CN220788273U CN202320708158.9U CN202320708158U CN220788273U CN 220788273 U CN220788273 U CN 220788273U CN 202320708158 U CN202320708158 U CN 202320708158U CN 220788273 U CN220788273 U CN 220788273U
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- 239000010865 sewage Substances 0.000 title claims abstract description 44
- 238000011282 treatment Methods 0.000 title claims abstract description 39
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 290
- 239000000945 filler Substances 0.000 claims abstract description 72
- 238000006243 chemical reaction Methods 0.000 claims abstract description 57
- 238000005842 biochemical reaction Methods 0.000 claims abstract description 52
- 238000004062 sedimentation Methods 0.000 claims abstract description 40
- 239000010802 sludge Substances 0.000 claims abstract description 31
- 238000005273 aeration Methods 0.000 claims abstract description 27
- 238000005191 phase separation Methods 0.000 claims abstract description 21
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 238000007667 floating Methods 0.000 claims abstract description 12
- 238000011049 filling Methods 0.000 claims abstract description 4
- 238000012856 packing Methods 0.000 claims description 25
- 241000196324 Embryophyta Species 0.000 claims description 22
- 239000002245 particle Substances 0.000 claims description 8
- 239000011435 rock Substances 0.000 claims description 5
- 239000002893 slag Substances 0.000 claims description 5
- 244000025254 Cannabis sativa Species 0.000 claims description 4
- 235000005273 Canna coccinea Nutrition 0.000 claims description 3
- 240000008555 Canna flaccida Species 0.000 claims description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical group [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 241000255581 Drosophila <fruit fly, genus> Species 0.000 claims description 3
- 235000014676 Phragmites communis Nutrition 0.000 claims description 3
- 241000233948 Typha Species 0.000 claims description 3
- 229910021536 Zeolite Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 3
- 239000004575 stone Substances 0.000 claims description 3
- 239000010457 zeolite Substances 0.000 claims description 3
- 241001632052 Haloxylon ammodendron Species 0.000 claims description 2
- 239000012765 fibrous filler Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 9
- 239000007788 liquid Substances 0.000 abstract description 7
- 238000013461 design Methods 0.000 abstract description 4
- 238000010992 reflux Methods 0.000 abstract description 4
- 238000007796 conventional method Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 17
- 238000000034 method Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 12
- 238000007599 discharging Methods 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 4
- 229910052698 phosphorus Inorganic materials 0.000 description 4
- 239000011574 phosphorus Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
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- 238000007254 oxidation reaction Methods 0.000 description 3
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- 238000001556 precipitation Methods 0.000 description 2
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- 239000004743 Polypropylene Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000011284 combination treatment Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005202 decontamination Methods 0.000 description 1
- 230000003588 decontaminative effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001546 nitrifying effect Effects 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Biological Treatment Of Waste Water (AREA)
Abstract
The utility model discloses an ecological modular sewage treatment device which comprises a biochemical reaction tank and a subsurface flow wetland. The biochemical reaction tank comprises a reaction zone and a sedimentation zone, wherein the sedimentation zone is provided with a solid-liquid-gas three-phase separation plate and an inclined plate sedimentation zone, the reaction zone comprises an ecological floating bed, soft fiber fillers, a microporous aeration disc, a perforated sludge discharge pipe and a buffer plate, the biochemical reaction tank is connected with one end module of the subsurface flow wetland, an even number of middle modules are spliced between the two end modules, the end modules are provided with a water collecting and distributing pipe, an end water return pipe, a control valve and water passing holes, and the middle modules are provided with middle water pipes, middle water return pipes and water passing holes. The biochemical reaction tank does not need the reflux of the sludge mixed liquid, the single tank can continuously feed water and discharge water, and has obvious advantages compared with the conventional method. The subsurface wetland realizes the switchable water inlet and outlet ends, and effectively reduces the risk of filling blockage. Meanwhile, the modular design is adopted, and the installation is convenient. The utility model can treat sewage efficiently and realize ecological landscape effect.
Description
Technical Field
The utility model belongs to the technical field of sewage treatment, and particularly relates to an ecological modular sewage treatment device.
Background
The development of domestic sewage treatment technology is very mature, different kinds of treatment processes are all arranged simultaneously, and especially for small-sized sewage treatment devices, the common devices are more in partition, the flow is complex, the operation efficiency is not ideal, and the production efficiency of the sewage treatment devices is lower. At present, the conventional small-sized modularized sewage treatment device mainly comprises an AO process, an A2/O process, an MBR process, a biological contact oxidation process, an artificial wetland process and the like, and the processes have the characteristics, but have the limitation of adopting a single mode. The nitrifying liquid and sludge in the AO process treatment device flow back to cause the increase of dissolved oxygen in the anoxic tank, thereby reducing the denitrification efficiency, having no strict biological dephosphorization environment and low dephosphorization efficiency, and generally needing to add chemicals for dephosphorization. The A2/O process treatment device has more treatment areas, and needs the reflux of sludge and mixed liquor, thereby having high operation cost. The MBR process treatment device has high investment cost, membrane cleaning or back flushing needs to be carried out regularly in operation and maintenance, and the operation energy consumption is high. The biological contact oxidation process treatment device has no anoxic environment, and the overall denitrification and dephosphorization efficiency is general. The constructed wetland has the advantages of low investment cost, low operation and maintenance technical requirements, capability of building ecological landscape effect, large occupied area, easy blockage, poor impact load resistance, inconvenient filler replacement, incapability of directly treating domestic sewage and the like.
Disclosure of Invention
The utility model aims to provide an ecological type modularized sewage treatment device aiming at the problems existing in the prior art.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the ecological modular sewage treatment device comprises a biochemical reaction tank and a subsurface flow wetland, wherein the biochemical reaction tank is divided into a reaction area and a sedimentation area by a retaining wall, the bottom of the sedimentation area is provided with a slope, the bottom of the retaining wall is connected with an inclined solid-liquid-gas three-phase separation plate, the solid-liquid-gas three-phase separation plate forms an included angle with the slope at the bottom of the sedimentation area and is provided with a first water passing channel, a vertical buffer plate is arranged in the reaction area close to the solid-liquid-gas three-phase separation plate, a top gap is reserved between the top of the buffer plate and the solid-liquid-gas three-phase separation plate, and a second water passing channel is reserved between the bottom of the buffer plate and the bottom of the reaction area;
a biochemical reaction tank water inlet pipe is arranged at the upper part of one side wall of the reaction zone, the height of the biochemical reaction tank water inlet pipe is lower than that of the top of the retaining wall, an ecological floating bed is arranged on the water surface in the reaction zone, emergent aquatic plants are planted in the ecological floating bed, soft fiber filler is arranged below the water surface in the reaction zone, a microporous aeration disc is arranged below the soft fiber filler, and a perforated sludge discharge pipe is arranged at the slope bottom of the reaction zone, which is close to the slope of the sedimentation zone;
the middle part of the sedimentation zone is provided with an inclined plate sedimentation zone, the upper part of the side wall of the sedimentation zone is provided with a biochemical reaction tank water outlet pipe, the height of the biochemical reaction tank water outlet pipe is lower than that of the top of the retaining wall, and the biochemical reaction tank water outlet pipe is connected with a water inlet and outlet pipe of an end module in the subsurface flow wetland.
The subsurface flow wetland as described above comprises two end modules,
each end module comprises a wet area, an end module filler layer is arranged in the wet area, a water collecting and distributing pipe, an end water conveying pipe and an end water return pipe are arranged above the end module filler layer, wherein the water collecting and distributing pipe is positioned on the water collecting and distributing side of the end module, the end water conveying pipe and the end water return pipe are respectively positioned on two side sides of the end module, and downward perforations are formed in the side wall of the water collecting and distributing pipe; end module plants are planted on the end module filler layer;
in one end module: the water inlet and outlet pipe is respectively communicated with the water collecting and distributing pipe and the end water delivery pipe through a tee joint, the end water return pipe is communicated with the water collecting and distributing pipe, a first control valve is arranged on the water collecting and distributing pipe close to the water inlet and outlet pipe, and a second control valve is arranged on the end water delivery pipe close to the water inlet and outlet pipe;
in the other end module: the water inlet and outlet pipe is respectively communicated with the water collecting and distributing pipe and the end water return pipe through a tee joint, the end water delivery pipe is communicated with the water collecting and distributing pipe, a first control valve is arranged on the water collecting and distributing pipe close to the water inlet and outlet pipe, and a second control valve is arranged on the end water return pipe close to the water inlet and outlet pipe;
the bottom of the side wall of each end module splicing side is provided with an end module bottom water passing hole.
The subsurface flow wetland as described above also comprises an even number of intermediate modules, which are spliced between the two end modules,
the middle module is internally provided with a middle module packing layer, a middle water delivery pipe and a middle water return pipe are respectively arranged on the middle module packing layer and on two sides of the middle module, when the subsurface flow wetland is assembled, each end water delivery pipe and each middle water delivery pipe are sequentially connected in series, and each end water return pipe and each middle water return pipe are sequentially connected in series;
the middle module packing layer is planted with middle module plants;
the side wall bottom of one splicing side of the middle module is provided with a middle module bottom water passing hole, the upper part of the side wall of the other splicing side of the middle module is provided with a middle module top water passing hole, the end module bottom water passing hole is communicated with the adjacent middle module bottom water passing hole, the middle module bottoms water passing holes of the adjacent middle modules are communicated, and the middle module tops water passing holes of the adjacent middle modules are communicated.
The number of intermediate modules is not more than six as described above.
The perforated sludge discharge pipe is communicated with the bottom end of the vertical sludge discharge pipe, and the top end of the vertical sludge discharge pipe extends upwards along the side wall of the reaction zone and penetrates out of the side wall of the reaction zone at a position lower than the water surface of the reaction zone.
As described above, the microporous aeration disc is communicated with the air outlet end of the aeration pipe, and the air inlet end of the aeration pipe extends out of the reaction zone from the top of the reaction zone.
And the upper part in the sedimentation area is provided with a water outlet weir groove, the height of the water outlet weir groove is lower than that of the top of the retaining wall, and the water outlet weir groove is communicated with a water outlet pipe of the biochemical reaction tank.
According to the ecological type modularized sewage treatment device, the control well is arranged on one side of each end module, the wet area of each end module is located in the rest part of the end module, and the water inlet and outlet pipe, the tee joint, the first control valve and the second control valve are all located in the control well.
The soft fiber filler is an elastic filler as described above; the emergent aquatic plant is copper coin grass or drosophila or haloxylon ammodendron.
The filler of the end module filler layer and the middle module filler layer adopts broken stone filler or zeolite or blast furnace slag or volcanic rock, the filler particle size of the end module filler layer is 30-60 mm, and the filler particle size of the middle module filler layer is 10-30 mm; the end module plants and the middle module plants are reed, typha, iris or canna.
Compared with the prior art, the utility model has the following beneficial effects:
1. the sewage treatment equipment is modularized and standardized, and the production efficiency is improved.
2. The sewage biochemical treatment and the wetland purification are integrated, the pollution load impact resistance of the biochemical end is realized, the low pollution effect of the wetland end treatment is good, the investment and the operation cost are reduced, and the occupied area is reduced compared with a single mode.
3. The biochemical reaction tank does not need the backflow of a sludge mixed liquid, and the single tank can continuously feed water and discharge water, so that the biochemical reaction tank has obvious advantages compared with the conventional biochemical reaction tank.
4. The subsurface wetland realizes the switchable water inlet and outlet ends, and effectively reduces the risk of filling blockage.
5. According to different water qualities, the subsurface wetland can select fillers with different properties, and the fillers are convenient to replace and flexible to operate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute an undue limitation to the application.
Fig. 1: a top view of the biochemical reaction tank;
fig. 2: a top view of the subsurface flow wetland;
fig. 3: a section view of the biochemical reaction tank a-a;
fig. 4: a section view of the biochemical reaction tank b-b;
fig. 5: a cross section view of the subsurface flow wetland c-c;
in the figure:
a1-biochemical reaction tank water inlet pipe, A2-1-ecological floating bed, A2-soft fiber filler, A3-1-aeration pipe, A3-2-microporous aeration disk, A4-1-perforated mud discharge pipe, A4-2-vertical mud discharge pipe, A5-1-solid, liquid and gas three-phase separation plate, A5-2-inclined plate sedimentation zone, A5-3-water outlet weir groove, A5-4-biochemical reaction tank water outlet pipe, A5-buffer plate,
B1-water inlet and outlet pipe, B2-1-control well, B2-first control valve, B2-3-second control valve, B3-1-end water delivery pipe, B3-2-end water return pipe, B4-water collecting and distributing pipe, B5-end module bottom water passing hole, B6-end module packing layer, B7-end module plant,
C-middle module, C4-middle module top water hole, C5-middle module bottom water hole, C3-1-middle water pipe, C3-2-middle water return pipe, C6-middle module filler layer.
Detailed Description
The present utility model will be further described in detail below in conjunction with the following examples, for the purpose of facilitating understanding and practicing the present utility model by those of ordinary skill in the art, it being understood that the examples described herein are for the purpose of illustration and explanation only and are not intended to limit the utility model.
Example 1:
an ecological modular sewage treatment device comprises a biochemical reaction tank and a subsurface flow wetland.
The biochemical reaction tank adopts a biological contact oxidation method, and the ecological landscape effect of the treatment device is increased while sewage is treated. The biochemical reaction tank is divided into a reaction zone and a precipitation zone by a retaining wall, wherein the reaction zone comprises: aeration system, sludge discharge system, ecological floating bed A2-1, and soft fiber filler A2-2, wherein the aeration system comprises aeration pipe A3-1 and microporous aeration disk A3-2, and the sludge discharge system comprises perforationsThe mud discharging pipe A4-1 and the vertical mud discharging pipe A4-2 are elastic filler A2-2 (elastic filler usually adopts yarn wool making technology, yarn wool is polyolefin, the diameter is 0.45mm, and the specific surface area is not less than 250 m) 2 /m 3 The central rope is made of polypropylene, and has tensile strength not lower than 30N/mm 2 ). The precipitation zone comprises: the solid-liquid-gas three-phase separation plate A5-1, the inclined plate sedimentation area A5-2, the water outlet weir groove A5-3 and the buffer plate A5-5. The reaction zone adopts gap aeration, and the anaerobic and aerobic environment of the reaction tank in time is created by controlling the ratio of aeration time to non-aeration time, so as to realize biological denitrification and dephosphorization treatment. The ecological floating bed A2-1 is arranged on the water surface in the reaction zone, emergent aquatic plants (common varieties are copper coin grass, drosophila herb or halofop-butyl grass and the like) are planted in the ecological floating bed A2-1, and peculiar smell brought by aeration of the reaction zone can be effectively reduced. The biochemical reaction tank can cope with no water inflow for a long time, and the restarting speed is high. The specific structure of the biochemical reaction tank is as follows:
the biochemical reaction tank is divided into a reaction area and a sedimentation area by a retaining wall, the bottom of the sedimentation area is a slope, the bottom of the retaining wall is connected with an inclined solid-liquid-gas three-phase separation plate A5-1, an included angle is formed between the solid-liquid-gas three-phase separation plate A5-1 and the slope at the bottom of the sedimentation area, a first water passing channel is reserved between the bottom of the solid-liquid-gas three-phase separation plate A5-1 and the slope at the bottom of the sedimentation area, a vertical buffer plate A5-5 is arranged at the position, close to the solid-liquid-gas three-phase separation plate A5-1, of the reaction area, a top gap is reserved between the top of the buffer plate A5-5 and the solid-liquid-gas three-phase separation plate A5-1, and a second water passing channel is reserved between the bottom of the buffer plate A5-5 and the bottom of the reaction area. The upper part of one side wall of the reaction zone is provided with a biochemical reaction tank water inlet pipe A1, and the height of the biochemical reaction tank water inlet pipe A1 is lower than the height of the top of the retaining wall. The ecological floating bed A2-1 is arranged on the water surface in the reaction zone, the soft fiber filler A2-2 is arranged below the water surface in the reaction zone, and the soft fiber filler A2-2 is fixed below the ecological floating bed A2-1 in the embodiment. A microporous aeration disc A3-2 is arranged below the soft fiber filler A2-2, the microporous aeration disc A3-2 is communicated with the air outlet end of an aeration pipe A3-1, and the air inlet end of the aeration pipe A3-1 extends out of the reaction zone from the top of the reaction zone. The perforated sludge discharge pipe A4-1 is positioned at the bottom of the reaction zone close to the sedimentation zone, namely, the perforated sludge discharge pipe A4-1 is positioned close to the slope bottom of the slope of the sedimentation zone, the perforated sludge discharge pipe A4-1 is horizontally arranged, the bottom ends of the perforated sludge discharge pipe A4-1 and the vertical sludge discharge pipe A4-2 are communicated, the top end of the vertical sludge discharge pipe A4-2 extends upwards along the side wall of the reaction zone and penetrates out of the side wall of the reaction zone at a position lower than the water surface of the reaction zone to be communicated with air to serve as an outlet of a sludge discharge system, the water surface of the reaction zone is higher than the outlet of the sludge discharge system, the water pressure of the water body of the reaction zone can be utilized to discharge the muddy water mixture with high concentration at the bottom of the reaction zone out of the reaction zone without power suction, and a suction system can be independently equipped for muddy water suction. The middle part of the sedimentation zone is provided with an inclined plate sedimentation zone A5-2 for further solid-liquid separation, the upper part in the sedimentation zone is provided with a water outlet weir groove A5-3, the height of the water outlet weir groove A5-3 is lower than the height of the top of a retaining wall, the water outlet weir groove A5-3 is communicated with a biochemical reaction tank water outlet pipe A5-4 arranged on the upper part of the side wall of the sedimentation zone, the height of the biochemical reaction tank water outlet pipe A5-4 is also lower than the height of the top of the retaining wall, and the biochemical reaction tank water outlet pipe A5-4 is connected with a water inlet and outlet pipe B1 of one end module in the subsurface flow wetland.
The sewage to be treated enters the reaction zone from the water inlet pipe A1 of the biochemical reaction tank, the flow rate of the sewage treated by the reaction zone is reduced through the buffer plate A5-5, and then the sewage reaches the position of the solid-liquid-gas three-phase separation plate A5-1 through the second water passing channel and the top gap. The solid in the sewage slides down to the perforated mud discharging pipe A4-1 along the slope at the bottom of the sedimentation zone under the action of self gravity, and then is discharged out of the biochemical reaction tank body through the perforated mud discharging pipe A4-1 and the vertical mud discharging pipe A4-2; the gas in the sewage reaching the solid-liquid-gas three-phase separation plate A5-1 returns to the reaction zone through the top gap between the solid-liquid-gas three-phase separation plate A5-1 and the buffer plate A5-5; the sewage reaching the solid-liquid-gas three-phase separation plate A5-1 continuously flows to the inclined plate sedimentation area A5-2 through the first water passage, and when the water surface height of the sedimentation area reaches the height of the water outlet weir groove A5-3, the sewage treated by the biochemical reaction tank overflows from the water outlet weir groove A5-3 and flows into the end module of the subsurface flow wetland through the water outlet pipe A5-4 of the biochemical reaction tank.
The biochemical reaction tank can realize continuous water inlet of the water inlet pipe A1 of the biochemical reaction tank and continuous water outlet of the water outlet pipe A5-4 of the biochemical reaction tank, and the sludge reflux and the mixed liquid reflux of the reaction zone are not needed, so that better organic matter removal efficiency is realized. The solid-liquid-gas three-phase separation plate A5-1, the buffer plate A5-5 and the inclined plate sedimentation zone A5-2 are organically combined, so that the disturbance of the reaction zone to the sedimentation zone is reduced, and the sedimentation efficiency of the sedimentation zone is improved.
The subsurface flow wetland adopts a horizontal subsurface flow type, can realize the switching of water inlet and outlet ends, can effectively prevent the blockage of the wetland and prolong the service life of the wetland. The undercurrent wetland is provided with two wetland modules, namely an end module and a middle module C, which are assembled according to the treatment scale and the site condition. The water inlet end and the water outlet end of the subsurface flow wetland are provided with a valve switching control design, so that the change of the water flow direction is realized, in the practical application, the porosity of a packing layer is reduced in the operation of one water flow direction mode of the wetland, the water head loss is increased, the water flow direction can be switched, the reverse water flow can be utilized to bring out the blocking material of the packing layer, the porosity is improved, and the water head loss of the wetland is effectively controlled.
The main components of the subsurface flow wetland are as follows: (1) two end modules, each of which includes: the water inlet and outlet pipe B1, the control well B2-1, the first control valve B2-2, the second control valve B2-3, the end water delivery pipe B3-1, the end water return pipe B3-2, the water collecting and distributing pipe B4, the end module bottom water passing hole B5, the end module filler layer B6 and the end module plant B7. (2) the intermediate module C comprises: the top of the middle module is provided with a water passing hole C4, the bottom of the middle module is provided with a water passing hole C5, a middle water delivery pipe C3-1, a middle water return pipe C3-2, a middle module packing layer C6 and middle module plants. The specific structure and the functions of each part of the subsurface flow wetland are as follows:
the two end modules can be used as water inlet modules or water outlet modules, the two end modules are necessary to be included in completing the function of the subsurface wetland, and the middle module C is an expandable module spliced between the two end modules.
Each end module comprises a control well B2-1 and a wet area, the control well B2-1 is positioned on one side edge of the end module, the control well B2-1 is arranged in one side edge of the end module, the rest part in the end module is the wet area, an end module filler layer B6 is arranged in the wet area, a water collecting and distributing pipe B4, an end water pipe B3-1 and an end water return pipe B3-2 are arranged on the end module filler layer B6, and end module plants B7 are planted on the end module filler layer B6. One of the end modules is: the water inlet and outlet pipe B1 arranged in the control well B2-1 is respectively communicated with the water collecting and distributing pipe B4 and the end water delivery pipe B3-1 through a tee joint, the end water return pipe B3-2 is communicated with the water collecting and distributing pipe B4, a first control valve B2-2 is arranged on the water collecting and distributing pipe B4 close to the water inlet and outlet pipe B1, and a second control valve B2-3 is arranged on the end water delivery pipe B3-1 close to the water inlet and outlet pipe B1; in the other end module: the water inlet and outlet pipe B1 arranged in the control well B2-1 is respectively communicated with the water collecting and distributing pipe B4 and the end water return pipe B3-2 through a tee joint, the end water delivery pipe B3-1 is communicated with the water collecting and distributing pipe B4, a first control valve B2-2 is arranged on the water collecting and distributing pipe B4 close to the water inlet and outlet pipe B1, and a second control valve B2-3 is arranged on the end water return pipe B3-2 close to the water inlet and outlet pipe B1. The tee joint, the first control valve B2-2 and the second control valve B2-3 are all positioned in the control well B2-1 and are matched with each other to control the water flow direction of the wetland. The subsurface flow wetland water distribution and collection adopts a perforated pipe form, the side wall of the water collection and distribution pipe B4 is provided with perforations, and the perforations are downward so as to facilitate water distribution and collection.
The two opposite sides of the end module are respectively a water collecting and distributing side and a splicing side, the remaining two opposite sides are side sides, the water collecting and distributing pipe B4 is arranged on the water collecting and distributing side of the end module, and the end water conveying pipe B3-1 and the end water return pipe B3-2 are respectively positioned on the two side sides of the end module.
The two opposite sides of the middle module C are splicing sides, the two remaining opposite sides are side sides, a middle module filler layer C6 is arranged in the middle module C, a middle water pipe C3-1 and a middle water return pipe C3-2 are respectively arranged on the middle module filler layer C6 and positioned on the two side sides of the middle module C, when the subsurface flow wetland is spliced, the splicing sides of the end modules and the splicing sides of the adjacent middle modules C are spliced, the adjacent middle modules C are spliced through the splicing sides of the middle modules C, the end water pipes B3-1 and the middle water pipes C3-1 are sequentially connected in series to form a water conveying main pipe, and the end water return pipes B3-2 and the middle water return pipes C3-2 are sequentially connected in series to form a water return main pipe. The middle module filler layer C6 is planted with middle module plants.
In order to make sewage fully contact with the filler, an end module bottom water passing hole B5 is formed in the bottom of the side wall of the splicing side of the end module, a middle module bottom water passing hole C5 is formed in the bottom of the side wall of the splicing side of the middle module C, and a middle module top water passing hole C4 is formed in the upper portion of the side wall of the other splicing side of the middle module C. When the subsurface wetland is spliced, the water passing holes B5 at the bottoms of the two end modules are communicated when only the two end modules are spliced; and when the middle modules C are spliced between the two end modules, the water holes B5 at the bottoms of the end modules are communicated with the water holes C5 at the bottoms of the adjacent middle modules, the water holes C5 at the bottoms of the middle modules of the adjacent middle modules C are communicated, and the water holes C4 at the tops of the middle modules of the adjacent middle modules C are communicated.
When the subsurface wetland is assembled, two end modules are needed, and the middle modules C are selected from even numbers, such as: the two end modules are assembled into one undercurrent wetland, or the two end modules and the two middle modules C are assembled into one undercurrent wetland (standard group). Considering that the two splicing sides of the middle module C are respectively provided with a middle module top water passing hole C4 and a middle module bottom water passing hole C5, in order to ensure that the water flow of the subsurface wetland completely passes through the middle module filler layer C6, the water flow passes through each end module and the middle module C at an up-down interval, and therefore, the number of the middle modules C is also required to be even. Considering the requirements of the hydraulic gradient of the subsurface wetland, the total number of the end modules and the middle modules C is not more than eight, namely the number of the middle modules C is not more than six.
The design height of the subsurface flow wetland is 1200mm, wherein the thickness of a packing layer is 900mm, the thickness of the packing layer is 300mm (the thickness of the packing layer is 300mm, namely the distance of the top of the wetland pool wall is higher than that of the packing layer), the packing in the end module packing layer B6 can adopt packing with larger particle size, the designed particle size is 30-60 mm, the uniformity of water distribution of the cross section of the wetland is facilitated, the porosity of the packing in the end module packing layer B6 is increased, and the blocking risk is reduced. The filler in the middle module filler layer C6 can adopt filler with smaller particle size, the particle size is designed to be 10-30 mm, the specific surface area of the filler in the middle module filler layer C6 is increased, and the wetland purifying efficiency is improved. The end module filler layer B6 and the middle module filler layer C6 can be selected according to the water quality requirements of design water inlet and outlet, broken stone fillers are adopted conventionally, and under the condition of higher denitrification and dephosphorization requirements, the types of fillers can be selected to be zeolite, blast furnace slag or volcanic rock and the like. When the water quality of the effluent is poor in a certain period of operation, especially the total phosphorus index can be opposite to the endThe part module filler layer B6 and the middle module filler layer C6 are replaced, and fillers with good phosphorus removal effect, such as volcanic rock, blast furnace slag and the like, are replaced. The end module plant B7 and the middle module plant are selected to have strong decontamination capability, developed root system and good landscape effect, such as reed, typha, iris, canna, etc., and the planting density is 10-15 plants/m 2 。
Sewage enters the biochemical reaction tank from the water inlet pipe A1 of the biochemical reaction tank, the biochemical reaction tank is formed by the water outlet pipe A5-4 of the biochemical reaction tank, the reaction area is intermittently aerated, and sludge is discharged out periodically. The ratio of aeration to gap time of the microporous aeration disk A3-2 is 3:1, and the aeration and gap time can be properly adjusted according to the water quality characteristics of the inlet water and the outlet water, so as to create an anoxic and aerobic environment for biological denitrification and dephosphorization. The sludge treatment in the reaction zone is realized, the biological film can grow on the soft fiber filler A2-2 in the reaction zone pool, the sludge production amount is small, the sludge discharge period is long, and the sewage treatment equipment is suitable for small-scale operation, can be transported to a sludge centralized treatment center through a municipal sewage suction truck, and reduces the sludge treatment cost. The emergent aquatic plants of the ecological floating bed A2-1 need to be corrected regularly in real time, and the dead branches and the dead leaves are cut off. The soft fiber filler A2-2 needs to be checked regularly, and when the biological film grows too much and is solidified and can not fall off by itself, the biological film needs to be replaced. The sedimentation zone can complete gaseous solid-liquid separation, turbulent flow can not influence the sedimentation zone during aeration, and the reaction zone can continuously feed water and continuously discharge water.
By controlling the first control valve B2-2 and the second control valve B2-3, the free switching of water inlet and water outlet in the subsurface wetland is realized, namely the water collecting and distributing pipe B4 can be used as a water distributing pipe and a water collecting pipe. The water flow direction of the wetland is changed, and the blockage risk of the subsurface wetland is effectively reduced. The water collecting and distributing pipe B4 in the end module has the functions of water distribution and water collection, and the end water delivery pipe B3-1 and the end water return pipe B3-2 have the functions of water flow delivery for realizing the function of the water collecting and distributing pipe B4. The water inlet and outlet switching operation process in the subsurface flow wetland is as follows:
as shown in fig. 2, the water inlet and outlet pipe B1 of the end module on the left side is used as the water inlet of the undercurrent wetland, the water inlet and outlet pipe B1 of the end module on the right side is the water outlet of the undercurrent wetland, and two middle modules C are spliced between the two end modules. After the effluent of the biochemical reaction tank enters the subsurface wetland, when the first control valve B2-2 of the left end module is opened, the second control valve B2-3 of the left end module is closed, the first control valve B2-2 of the right end module is opened, the second control valve B2-3 of the right end module is closed, water flows specifically, namely, sewage enters the water collecting and distributing pipe B4 of the left end module through the water inlet and outlet pipe B1 of the left end module, then flows into the end module packing layer B6 of the left end module through the perforation of the water collecting and distributing pipe B4 of the left end module, then flows downwards and then sequentially flows through the bottom water passing holes B5 of the end module of the left end module, the bottom water passing holes C5 of the middle module and the top water passing holes C4 of the middle module along a spacing uplink and downlink path to the end module packing layer B6 of the right end module, enters the water collecting and distributing pipe B4 of the right end module through the perforation on the water collecting and distributing pipe B4 of the right end module, and finally flows out of the water collecting and distributing pipe B4 of the right end module;
during operation, the wet water flow direction can be switched, namely, the first control valve B2-2 of the left end module is closed, the second control valve B2-3 of the left end module is opened, the first control valve B2-2 of the right end module is closed, the second control valve B2-3 of the right end module is opened, water flows specifically, namely, sewage flows from the water inlet and outlet pipe B1 of the left end module into the water collecting and distributing pipe B4 of the right end module along the water conveying main pipe and flows into the end module packing layer B6 of the right end module from perforations in the water collecting and distributing pipe B4 of the right end module, then flows through each middle module C along an interval uplink and downlink path through the end module bottom water passing hole B5 of the right end module, the middle module bottom water passing hole C5 flows into the end module packing layer B6 of the left end module, then flows into the water collecting and distributing pipe B4 of the left end module along the water collecting and distributing pipe B4 of the left end module, and then flows out of the water collecting and distributing pipe B1 along the water collecting and distributing pipe B1 of the right end module.
When a water flow direction is blocked by the filler, the porosity of the end module filler layer B6 and the middle module filler layer C6 is reduced due to the attachment and fixation of the biomembrane in the water flow direction, and reverse water flow is performed at the moment, so that the biomembrane fixed on the filler can be loosened, and the water flow can bring the biomembrane out of the end module filler layer B6 and the middle module filler layer C6, so that the porosity of the end module filler layer B6 and the middle module filler layer C6 is improved, and the wetland blockage is slowed down. When the water quality of the effluent is poor, particularly the total phosphorus index appears in a certain period of operation, the packing in the single end module packing layer B6 or the middle module packing layer C6 can be replaced, and the packing with good phosphorus removal effect, such as volcanic rock, blast furnace slag and the like, can be replaced.
The utility model explores a sewage treatment combination which can treat sewage efficiently and realize ecological landscape effect. The adopted combination mode is a biochemical reaction tank and a subsurface flow wetland. The defects that the conventional activated sludge method and the biomembrane method are high in process operation cost, lack of ecological landscape, the constructed wetland cannot directly treat domestic sewage, and the hydraulic load is low are overcome; the advantages of strong pollution impact load resistance of the former and remarkable low pollution water treatment effect of the latter are maintained. Meanwhile, the processing device is modularized, so that the construction period of the project is shortened, and the project efficiency is improved.
It should be noted that the specific embodiments described in this application are merely illustrative of the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or its scope as defined in the accompanying claims.
Claims (10)
1. The ecological modular sewage treatment device is characterized by comprising a biochemical reaction tank and a subsurface flow wetland, wherein the biochemical reaction tank is divided into a reaction area and a sedimentation area by a retaining wall, the bottom of the sedimentation area is provided with a slope, the bottom of the retaining wall is connected with an inclined solid-liquid-gas three-phase separation plate (A5-1), the solid-liquid-gas three-phase separation plate (A5-1) forms an included angle with the slope at the bottom of the sedimentation area and is provided with a first water passing channel, a vertical buffer plate (A5-5) is arranged in the reaction area, which is close to the solid-liquid-gas three-phase separation plate (A5-1), a top gap is reserved between the top of the buffer plate (A5-5) and the solid-liquid-gas three-phase separation plate (A5-1), and a second water passing channel is reserved between the bottom of the buffer plate (A5-5) and the bottom of the reaction area;
a biochemical reaction tank water inlet pipe (A1) is arranged at the upper part of one side wall of the reaction zone, the height of the biochemical reaction tank water inlet pipe (A1) is lower than the height of the top of the retaining wall, an ecological floating bed (A2-1) is arranged on the water surface in the reaction zone, emergent aquatic plants are planted in the ecological floating bed (A2-1), soft fiber filler (A2-2) is arranged below the water surface in the reaction zone, a microporous aeration disc (A3-2) is arranged below the soft fiber filler (A2-2), and a perforated sludge discharge pipe (A4-1) is arranged at the slope bottom of the reaction zone, which is close to the slope of the sedimentation zone;
the middle part of the sedimentation zone is provided with an inclined plate sedimentation zone (A5-2), the upper part of the side wall of the sedimentation zone is provided with a biochemical reaction tank water outlet pipe (A5-4), the height of the biochemical reaction tank water outlet pipe (A5-4) is lower than the height of the top of the retaining wall, and the biochemical reaction tank water outlet pipe (A5-4) is connected with a water inlet and outlet pipe (B1) of an end module in the subsurface wetland.
2. An ecological modular sewage treatment apparatus according to claim 1, wherein the subsurface flow wetland comprises two end modules,
each end module comprises a wet area, an end module filler layer (B6) is arranged in the wet area, a water collecting and distributing pipe (B4), an end water conveying pipe (B3-1) and an end water return pipe (B3-2) are arranged on the end module filler layer (B6), wherein the water collecting and distributing pipe (B4) is positioned on the water collecting and distributing side of the end module, the end water conveying pipe (B3-1) and the end water return pipe (B3-2) are respectively positioned on two side sides of the end module, and downward perforations are arranged on the side wall of the water collecting and distributing pipe (B4); an end module plant (B7) is also planted on the end module filler layer (B6);
at one end the module comprises: the water inlet and outlet pipe (B1) is respectively communicated with the water collecting and distributing pipe (B4) and the end water delivery pipe (B3-1) through a tee joint, the end water return pipe (B3-2) is communicated with the water collecting and distributing pipe (B4), a first control valve (B2-2) is arranged on the water collecting and distributing pipe (B4) close to the water inlet and outlet pipe (B1), and a second control valve (B2-3) is arranged on the end water delivery pipe (B3-1) close to the water inlet and outlet pipe (B1);
in the other end module: the water inlet and outlet pipe (B1) is respectively communicated with the water collecting and distributing pipe (B4) and the end water return pipe (B3-2) through a tee joint, the end water delivery pipe (B3-1) is communicated with the water collecting and distributing pipe (B4), a first control valve (B2-2) is arranged on the water collecting and distributing pipe (B4) close to the water inlet and outlet pipe (B1), and a second control valve (B2-3) is arranged on the end water return pipe (B3-2) close to the water inlet and outlet pipe (B1);
the bottom of the side wall of each end module splicing side is provided with an end module bottom water passing hole (B5).
3. An ecological modular sewage treatment apparatus according to claim 2, wherein the subsurface flow wetland further comprises an even number of intermediate modules (C), the intermediate modules (C) being spliced between two end modules,
an intermediate module filling layer (C6) is arranged in the intermediate module (C), an intermediate water pipe (C3-1) and an intermediate water return pipe (C3-2) are respectively arranged on the intermediate module filling layer (C6) and positioned on two sides of the intermediate module (C), and when the subsurface wetland is assembled, each end water pipe (B3-1) and each intermediate water pipe (C3-1) are sequentially connected in series, and each end water return pipe (B3-2) and each intermediate water return pipe (C3-2) are sequentially connected in series;
the middle module packing layer (C6) is planted with middle module plants;
the side wall bottom of one splicing side of the middle module (C) is provided with a middle module bottom water passing hole (C5), the side wall upper portion of the other splicing side of the middle module (C) is provided with a middle module top water passing hole (C4), the end module bottom water passing hole (B5) is communicated with an adjacent middle module bottom water passing hole (C5), the middle module bottoms water passing holes (C5) of the adjacent middle modules (C) are communicated, and the middle module tops of the adjacent middle modules (C) are communicated with each other.
4. An ecological modular sewage treatment apparatus as claimed in claim 3, wherein the number of intermediate modules (C) is not more than six.
5. An ecological modular sewage treatment apparatus according to claim 1, wherein the perforated sludge discharge pipe (A4-1) is connected to the bottom end of the vertical sludge discharge pipe (A4-2), and the top end of the vertical sludge discharge pipe (A4-2) extends upward along the side wall of the reaction zone and penetrates out of the side wall of the reaction zone at a position lower than the water level of the reaction zone.
6. An ecological modular sewage treatment apparatus according to claim 1, wherein the microporous aeration disc (A3-2) is communicated with the air outlet end of the aeration pipe (A3-1), and the air inlet end of the aeration pipe (A3-1) extends out of the reaction zone from the top of the reaction zone.
7. The ecological modularized sewage treatment device according to claim 1, wherein an effluent weir groove (A5-3) is formed in the upper portion in the sedimentation area, the height of the effluent weir groove (A5-3) is lower than the height of the top of the retaining wall, and the effluent weir groove (A5-3) is communicated with an outlet pipe (A5-4) of the biochemical reaction tank.
8. An ecological modular sewage treatment device according to claim 2, characterized in that a control well (B2-1) is provided at one side of each end module, the wet area of the end module being located in the rest of the end module, the water inlet and outlet pipe (B1), the tee, the first control valve (B2-2) and the second control valve (B2-3) being located in the control well (B2-1).
9. An ecological modular sewage treatment apparatus according to claim 1, characterized in that the soft fibrous filler (A2-2) is an elastic filler; the emergent aquatic plant is copper coin grass or drosophila or haloxylon ammodendron.
10. An ecological modular sewage treatment apparatus according to claim 3, wherein the fillers of the end module filler layer (B6) and the middle module filler layer (C6) are crushed stone filler or zeolite or blast furnace slag or volcanic rock, the filler particle size of the end module filler layer (B6) is 30-60 mm, and the filler particle size of the middle module filler layer (C6) is 10-30 mm; the end module plants (B7) and the middle module plants are reed or typha or iris or canna.
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