CN107879475B - Vertical flow three-dimensional constructed wetland sewage treatment system and sewage treatment method - Google Patents
Vertical flow three-dimensional constructed wetland sewage treatment system and sewage treatment method Download PDFInfo
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- CN107879475B CN107879475B CN201710939432.2A CN201710939432A CN107879475B CN 107879475 B CN107879475 B CN 107879475B CN 201710939432 A CN201710939432 A CN 201710939432A CN 107879475 B CN107879475 B CN 107879475B
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- 239000010865 sewage Substances 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 8
- 241000196324 Embryophyta Species 0.000 claims abstract description 49
- 239000000945 filler Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 69
- 239000002245 particle Substances 0.000 claims description 10
- 230000008595 infiltration Effects 0.000 claims description 3
- 238000001764 infiltration Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 abstract description 9
- 244000005700 microbiome Species 0.000 abstract description 3
- 229920006395 saturated elastomer Polymers 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 53
- 238000012856 packing Methods 0.000 description 18
- 230000000694 effects Effects 0.000 description 8
- 239000002352 surface water Substances 0.000 description 5
- 230000029553 photosynthesis Effects 0.000 description 4
- 238000010672 photosynthesis Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 4
- 239000008213 purified water Substances 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052698 phosphorus Inorganic materials 0.000 description 2
- 239000011574 phosphorus Substances 0.000 description 2
- 230000028327 secretion Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005273 aeration Methods 0.000 description 1
- 238000005276 aerator Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000031018 biological processes and functions Effects 0.000 description 1
- 239000011362 coarse particle Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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- Engineering & Computer Science (AREA)
- Microbiology (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Biodiversity & Conservation Biology (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Biotechnology (AREA)
- Botany (AREA)
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
- Hydroponics (AREA)
Abstract
The invention discloses a vertical flow three-dimensional type artificial wetland sewage treatment system which comprises an artificial wetland box body filled with filler, plants planted in the artificial wetland box body, an inlet pipe assembly and an outlet pipe assembly, wherein the artificial wetland box body is divided into a plurality of layers of planting areas from top to bottom, and the side wall of each layer of planting area is provided with a plurality of plant planting grooves distributed along the circumferential direction; the inlet pipe assembly is arranged at the top of the artificial wetland box body, and the outlet pipe assembly is arranged at the bottom of the artificial wetland box body; the invention discloses a vertical flow three-dimensional constructed wetland sewage treatment method; the invention has simple structure and modularization, and can add different modules for combined arrangement and parallel operation according to the flow; the plant density is high, the plant root systems and the microorganism quantity in the filling layer are rich, and the purification efficiency is improved; and by adopting an unsaturated seepage operation mode, the risk of filler blockage can be reduced compared with saturated seepage.
Description
Technical Field
The invention relates to domestic sewage collection and treatment, in particular to a vertical flow three-dimensional constructed wetland sewage treatment system and a sewage treatment method.
Background
With the increasing proportion of urban domestic sewage collection and treatment, rural distributed domestic sewage, rainwater runoff non-point source pollution and the like gradually become main pollution load sources of environmental problems. The artificial wetland is the best measure for solving the problem of low-flow domestic sewage. The planting density of the plants is improved, the nutrient elements such as nitrogen and phosphorus absorbed by the plants are increased, and meanwhile, a good aerobic environment is created due to the oxygen secretion of the plant root system, so that the removal of pollution load by biological action is improved. The root system layer is the position with the highest biological density and the highest pollution purification efficiency, so that the pollution removal effect is improved.
For example, patent document No. CN 105084650B discloses an integrated biological ecological sewage treatment system, which comprises a regulating reservoir, a sludge reservoir, a surface water distribution type biological filter and a circulating biological enhanced contact reservoir, wherein the regulating reservoir, the sludge reservoir, the surface water distribution type biological filter and the circulating biological enhanced contact reservoir are sequentially communicated and distributed in a G shape, the circulating biological enhanced contact reservoir adopts a central island type circulating structure, an inclined plate sedimentation reservoir and a vertical flow wetland are centrally arranged, the three are also sequentially communicated, a water inlet pipe is connected from the regulating reservoir, and a water outlet pipe is connected from the vertical flow wetland; the surface water distribution type biological filter is arranged above the circulating biological enhanced contact tank and has difference in elevation; a sludge return channel is arranged between the surface water distribution type biological filter and the sludge tank; the surface water distribution type biological filter tank is characterized in that semi-soft packing is adopted as the packing, the packing is made into unit blocks with the same size and shape, each packing is formed by cross assembly of sheets pressed into a corrugated shape, and a circular self-rotating water distributor is arranged on the upper part of the filter tank and above the packing; the circulating biological enhanced contact tank is an aerobic-anoxic environment and is provided with an aerobic zone and an anaerobic zone which are alternately distributed in sequence, and the ratio of the aerobic zone to the anaerobic zone is 4: 1, installing a jet aerator in the aerobic zone, and adopting a micro-aeration technology, wherein the filler of the circulating biological enhanced contact tank is a polyhedral hollow sphere filler; iron-rich ore fillers with phosphorus removal characteristics are placed in the vertical flow wetland.
However, the root systems of the traditional constructed wetland are all 30-40 cm at the upper layer, so that biomass is also gathered at the layer, the biomass below the root system layer is very little, and the purification effect is poor. However, due to the influence of blockage of the upper root system and the biological membrane, the seepage of the horizontal plug-flow type artificial wetland is mainly concentrated on the lower layer, and the standing time of the vertical flow artificial wetland on the root system layer is relatively short, so that the sewage purification is influenced, and the removal efficiency is reduced.
Disclosure of Invention
The invention discloses a vertical flow three-dimensional constructed wetland sewage treatment system and method, which change the planting mode of plants, lead the root systems to be distributed in the whole space of a packing layer, prolong the retention time of sewage in an efficient root system layer and further improve the purification efficiency.
A vertical flow three-dimensional type artificial wetland sewage treatment system comprises an artificial wetland box body filled with filler, plants planted in the artificial wetland box body, an inlet pipe assembly and an outlet pipe assembly, wherein the artificial wetland box body is divided into a plurality of layers of planting areas from top to bottom, and the side wall of each layer of planting area is provided with a plurality of plant planting grooves distributed along the circumferential direction; the inlet pipe assembly is arranged at the top of the artificial wetland box body, and the outlet pipe assembly is arranged at the bottom of the artificial wetland box body.
The artificial wetland provided by the invention consists of two parts, wherein the first part is a box body structure of the artificial wetland and comprises a plant planting groove at the periphery of the box body structure, wetland plants are planted in the groove, and under the action of the plant root system towards water, the root system is filled in the whole packing layer from top to bottom. The second part is a water inlet and outlet system, the water inlet system mainly comprises a water distribution pipe and a water distribution branch pipe, the water inlet is ensured to be uniformly distributed, and the water outlet pipe is distributed at the bottom of the box body and uniformly collects purified water.
In order to increase photosynthesis of plants, the plant growing grooves of the adjacent growing areas are preferably distributed in a staggered mode in the vertical direction. The plant planting groove is a planting box which is fixed on the side wall of the artificial wetland box body and is communicated with the inside of the artificial wetland box body, and the peripheral height of three sides of the plant planting groove is higher than the connecting hole of the plant planting groove and the artificial wetland box body.
In order to prevent the packing layer from being blocked, preferably, a water distribution pebble layer, the packing layer and a collection layer are respectively arranged inside the artificial wetland box body from top to bottom, and the packing layer covers the planting area. The water distribution pebble layer can be used for homogenizing water flow, the packing layer is used for purifying sewage, and the collecting layer is communicated with the water outlet pipe assembly to effectively discharge purified water.
In order to improve the uniformity of the water infiltration process, preferably, the inlet pipe assembly includes:
the water inlet and distribution pipe is arranged above the water distribution pebble layer; the water inlet and distribution pipe is a main pipeline and basically covers the upper part of the water distribution pebble layer, for example, if the artificial wetland box body is a cuboid, the water inlet and distribution pipe extends along the length direction and is arranged in the middle.
And the water distribution branch pipes are communicated with the water inlet and distribution pipes so as to cover the surface of the whole water distribution pebble layer. The arrangement of the branch pipes can make the water flow distribution more uniform.
And uniform water inlet is ensured, and preferably, the pebble particle diameter of the water distribution pebble layer is larger than the filler particle diameter of the filler layer. The pebbles with large particle size can shunt sewage, so that the sewage is dispersed more uniformly when permeating into the packing layer.
In order to improve the purification effect, the filler particle size of the filler layer is preferably 0.8-1.2 cm. The blockage of the packing layer can be effectively avoided by matching the larger particle packing with the unsaturated seepage.
The shape of constructed wetland box can be designed according to the environment, and in order to make full use of the purifying effect of the packing layer, it is preferable that the constructed wetland box is cylindrical, and the radius of the cylinder is not more than the depth of the plant root system.
For the purifying effect of make full use of the packing layer, it is preferred that the constructed wetland box is the cuboid, and the width of cuboid is not more than the twice plant roots degree of depth.
To the great operating mode of flow, can a plurality of constructed wetland boxes by the water main pipe of intaking to every constructed wetland box water distribution, form a plurality of box parallel operation, preferred, sewage treatment system includes a plurality of constructed wetland boxes, the entering pipe subassembly includes the intake water distributor of trunk line and many parallel connection access trunk lines, and every intake water distributor corresponds the top of an constructed wetland box, the outlet pipe subassembly includes the collection outlet pipe of main return water pipeline and many parallel connection access trunk lines, and every is collected the bottom that the outlet pipe correspondence inserted an constructed wetland box.
The invention also provides a vertical flow three-dimensional type artificial wetland sewage treatment method, and by using the vertical flow three-dimensional type artificial wetland sewage treatment system, the amount of water entering the pipe assembly into the artificial wetland tank body is smaller than the infiltration flow of the filler.
The invention aims to improve the purification efficiency of the artificial wetland, solve the problems of short retention time and limited purification rate of the traditional artificial wetland root system layer, improve the treatment efficiency of the traditional vertical flow artificial wetland, and avoid the artificial wetland failure caused by the blockage of filler particles by a biological membrane by adopting an unsaturated seepage mode.
The invention has the beneficial effects that:
(1) the invention has simple structure and modularization, and can add different modules for combined arrangement and parallel operation according to the flow;
(2) the invention has high plant density, rich plant root systems and microorganism quantity in the filler layer and improves the purification efficiency;
(3) the invention adopts an unsaturated seepage operation mode, and can reduce the risk of filler blockage compared with saturated seepage.
Drawings
Fig. 1 is a schematic sectional view of a vertical flow three-dimensional constructed wetland sewage treatment system of a single constructed wetland box body.
Fig. 2 is a schematic structural diagram of a vertical flow three-dimensional constructed wetland sewage treatment system of a single constructed wetland box body.
Fig. 3 is a schematic structural view of a vertical flow three-dimensional constructed wetland sewage treatment system with a plurality of constructed wetland box bodies connected in parallel.
In the figure, 1, an artificial wetland box body; 2. a plant planting tank; 3. a water inlet and distribution pipe; 4. water distribution pebble layer; 5. a filler layer; 6. plant root systems; 7. a collection layer; 8. collecting a water outlet pipe; 9. a water distribution branch pipe; 10. a plant; 11. a water inlet main pipe; 12. a plant groove connection hole; 13. and (7) discharging the water main pipe.
Detailed Description
As shown in fig. 1 to 3, the vertical flow three-dimensional constructed wetland sewage treatment system of the embodiment comprises an constructed wetland box body 1 and a water inlet and outlet pipe group, wherein the constructed wetland box body is divided into a plurality of planting areas from top to bottom, and the side wall of each planting area is provided with a plurality of plant planting grooves 2 distributed along the circumferential direction; the inlet pipe assembly is arranged at the top of the artificial wetland box body 1, and the outlet pipe assembly is arranged at the bottom of the artificial wetland box body 1.
Constructed wetland box 1 is the cuboid, and the width of cuboid is not more than the 6 degree of depth of twice plant roots, and the plant in adjacent layer planting district plants groove 2 and distributes in the vertical direction dislocation. The plant planting groove 2 is communicated with the artificial wetland box body 1 through a plant groove connecting hole 12.
The artificial wetland box body 1 is internally provided with a water distribution pebble layer 4, a filler layer 5 and a collection layer 7 from top to bottom, and the filler layer covers the planting area.
The access tube assembly comprises: the water inlet and distribution pipe 3 is arranged above the water distribution pebble layer 4; and a plurality of water distribution branch pipes 9 which are communicated with the water inlet and distribution pipe 3 to cover the whole water distribution pebble layer 4.
The pebble grain diameter of the water distribution pebble layer 4 is larger than the filler grain diameter of the filler layer 5. The filler particle size of the filler layer is 1.0 cm.
The plant planting grooves 2 are uniformly distributed on two sides of the box body, and the plant planting grooves 2 on each layer are mutually crossed, so that the photosynthesis of the plants 10 is sufficient. In the box body, the upper water distribution pebble layer 4 is coarse pebbles and mainly plays a role in water distribution, the lower layer is a collection layer 7 and also consists of coarse-particle pebbles, and a collection water outlet pipe 8 is laid at the bottom. The influent water uniformly sprinkles sewage on the surface layer of the artificial wetland tank body 1 through the influent water distribution pipes 3 and the water distribution branch pipes 9, the sewage enters the packing layer 5 after being uniformly distributed by the water distribution pebble layer 4, and root systems are densely distributed in the packing layer 5, so that the good absorption and oxygen secretion effects are achieved, the microorganism effect is strong, and the sewage is purified. The purified water is collected by the collecting pipe 8 and then discharged.
For the working condition with larger flow, a plurality of personal artificial wetland box bodies 1 can distribute water to each artificial wetland box body 1 through the water inlet main pipe 11, so that a plurality of box bodies can be operated in parallel. A certain space is reserved between the artificial wetland box bodies to ensure the photosynthesis of plants on two sides. The plants in the plant planting groove 2 can also be adjusted according to the plant height, the upper layer plants are lower in height, and the lower layer plants are higher in height, so that the plants can be more fully subjected to photosynthesis, and the operation effect is improved.
Claims (8)
1. A vertical flow three-dimensional type artificial wetland sewage treatment system comprises an artificial wetland box body filled with filler, plants planted in the artificial wetland box body, an inlet pipe assembly and an outlet pipe assembly, and is characterized in that the artificial wetland box body is divided into a plurality of layers of planting areas from top to bottom, the side wall of each layer of planting area is provided with a plurality of plant planting grooves distributed along the circumferential direction, and the plant planting grooves are communicated with the artificial wetland box body through plant groove connecting holes; a water distribution pebble layer, a filler layer and a collection layer are respectively arranged in the artificial wetland box body from top to bottom, and the filler layer covers the planting area;
the inlet pipe assembly is arranged at the top of the artificial wetland box body, and the outlet pipe assembly is arranged at the bottom of the artificial wetland box body;
the access tube assembly comprises:
the water inlet and distribution pipe is arranged above the water distribution pebble layer;
and the water distribution branch pipes are communicated with the water inlet and distribution pipes so as to cover the surface of the whole water distribution pebble layer.
2. The vertical flow three-dimensional constructed wetland sewage treatment system of claim 1, wherein the plant cultivation grooves of adjacent cultivation areas are distributed in a staggered manner in the vertical direction.
3. The vertical flow vertical type constructed wetland sewage treatment system of claim 1, wherein the pebble particle size of the water distribution pebble layer is larger than the filler particle size of the filler layer.
4. The vertical flow three-dimensional constructed wetland sewage treatment system of claim 1, wherein the filler particle size of the filler layer is 0.8-1.2 cm.
5. The vertical flow three-dimensional constructed wetland sewage treatment system of claim 1, wherein the constructed wetland box body is cylindrical, and the radius of the cylinder is not more than the depth of a plant root system.
6. The vertical flow vertical type constructed wetland sewage treatment system of claim 1, wherein the constructed wetland box body is a cuboid, and the width of the cuboid is not more than twice the depth of the plant root system.
7. The vertical flow three-dimensional type artificial wetland sewage treatment system of claim 1, wherein the sewage treatment system comprises a plurality of artificial wetland tanks, the inlet pipe assembly comprises a main pipe and a plurality of inlet water distribution pipes connected in parallel to the main pipe, each inlet water distribution pipe corresponds to the top of one artificial wetland tank, the outlet pipe assembly comprises a main water return pipe and a plurality of collecting outlet pipes connected in parallel to the main pipe, and each collecting outlet pipe corresponds to the bottom of one artificial wetland tank.
8. A vertical flow three-dimensional constructed wetland sewage treatment method is characterized in that the vertical flow three-dimensional constructed wetland sewage treatment system as claimed in any one of claims 1 to 7 is used, and the amount of water entering the pipe assembly into the constructed wetland tank is less than the infiltration flow of the filler.
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| CN201710939432.2A CN107879475B (en) | 2017-09-30 | 2017-09-30 | Vertical flow three-dimensional constructed wetland sewage treatment system and sewage treatment method |
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| CN201710939432.2A CN107879475B (en) | 2017-09-30 | 2017-09-30 | Vertical flow three-dimensional constructed wetland sewage treatment system and sewage treatment method |
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| CN107879475B true CN107879475B (en) | 2021-01-08 |
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| CN109837928B (en) * | 2018-09-12 | 2024-07-19 | 中国环境科学研究院 | Impermeable curtain, drainage guide impermeable system and application method of impermeable curtain |
| CN112851049A (en) * | 2021-03-16 | 2021-05-28 | 张家港市金港中心水利管理服务站 | Fabricated wetland system applied to discharge port treatment and discharge port treatment method |
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| CN201923924U (en) * | 2010-12-17 | 2011-08-10 | 浙江泰来环保科技有限公司 | Subsurface-flow constructed wetland sewage treatment reaction tank |
| CN102633363A (en) * | 2012-03-12 | 2012-08-15 | 浙江省环境保护科学设计研究院 | Sewage treatment system with stacked artificial wetlands |
| CN102642978A (en) * | 2011-02-20 | 2012-08-22 | 中国科学院城市环境研究所 | High-efficient circulating vertical flow constructed wetland and device suitable for sewage decentralized treatment |
| CN104418433A (en) * | 2013-08-20 | 2015-03-18 | 沈阳环境科学研究院 | Method for efficient sewage treatment by integrated flow constructed wetland |
| CN205710320U (en) * | 2016-05-08 | 2016-11-23 | 秦立 | Vertical sewage purification and plant cultivation system |
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- 2017-09-30 CN CN201710939432.2A patent/CN107879475B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201923924U (en) * | 2010-12-17 | 2011-08-10 | 浙江泰来环保科技有限公司 | Subsurface-flow constructed wetland sewage treatment reaction tank |
| CN102642978A (en) * | 2011-02-20 | 2012-08-22 | 中国科学院城市环境研究所 | High-efficient circulating vertical flow constructed wetland and device suitable for sewage decentralized treatment |
| CN102633363A (en) * | 2012-03-12 | 2012-08-15 | 浙江省环境保护科学设计研究院 | Sewage treatment system with stacked artificial wetlands |
| CN104418433A (en) * | 2013-08-20 | 2015-03-18 | 沈阳环境科学研究院 | Method for efficient sewage treatment by integrated flow constructed wetland |
| CN205710320U (en) * | 2016-05-08 | 2016-11-23 | 秦立 | Vertical sewage purification and plant cultivation system |
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