CN113213706A - Enhanced dephosphorization combined artificial wetland system utilizing rural biogas digester - Google Patents

Enhanced dephosphorization combined artificial wetland system utilizing rural biogas digester Download PDF

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Publication number
CN113213706A
CN113213706A CN202110595241.5A CN202110595241A CN113213706A CN 113213706 A CN113213706 A CN 113213706A CN 202110595241 A CN202110595241 A CN 202110595241A CN 113213706 A CN113213706 A CN 113213706A
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China
Prior art keywords
water
channel
water distribution
filler
aeration
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Pending
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CN202110595241.5A
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Chinese (zh)
Inventor
徐嘉旎
施猛猛
何起利
汪文佳
钟江波
韦星任
徐红梅
谢俊宇
楼晓燕
吴亮亮
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Zhejiang Wenyuan Environmental Protection Technology Co ltd
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Zhejiang Wenyuan Environmental Protection Technology Co ltd
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Priority to CN202110595241.5A priority Critical patent/CN113213706A/en
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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
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/28—Treatment of water, waste water, or sewage by sorption
    • C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
    • C02F1/46104—Devices therefor; Their operating or servicing
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00—Nature of the contaminant
    • C02F2101/10—Inorganic compounds
    • C02F2101/105—Phosphorus compounds
    • 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
    • C02F3/005—Combined electrochemical biological processes
    • 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

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  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Sorption (AREA)
  • Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)

Abstract

The invention belongs to the technical field of sewage treatment, and particularly relates to a reinforced dephosphorization combined artificial wetland system utilizing a rural methane tank, which comprises a water distribution channel unit, a methane tank unit and a water collection channel unit which are sequentially connected, wherein the water distribution channel unit comprises a water distribution channel, an aeration system is arranged at the bottom of the water distribution channel, a filler fixing plate is fixedly arranged above the aeration system and in the water distribution channel, iron-carbon microelectrolysis filler is arranged on the filler fixing plate, a first planting foam plate is arranged in the water distribution channel and above the iron-carbon microelectrolysis filler, a water inlet channel is arranged on one side of the top of the water distribution channel, the other side of the top of the water distribution channel is connected with the methane tank unit through a first water channel, the methane tank unit comprises a methane tank, a planting layer, a packing layer and a pebble layer are arranged in the methane tank from top to bottom, and the pebble layer is connected with the water collection channel unit through a second water channel. The invention combines the technical means of physical, chemical and biological combined phosphorus removal to improve the phosphorus removal efficiency of the constructed wetland.

Description

Enhanced dephosphorization combined artificial wetland system utilizing rural biogas digester
Technical Field
The invention belongs to the technical field of sewage treatment, and relates to a reinforced dephosphorization combined artificial wetland system utilizing a rural biogas digester.
Background
The artificial wetland is an ecosystem simulating a natural wetland by artificially configuring substrates, plants and microorganisms, and the system constructs a sewage treatment technology coupling physical and chemical actions. The constructed wetland has the advantages of simple process, low construction and operation cost, strong decontamination capability, long service life and the like, is particularly suitable for treating dispersed or small-scale sewage, and is widely used for rural domestic sewage treatment in recent years. The main phosphorus removal mechanisms of the current artificial wetland are physical action (sedimentation action), chemical action (sedimentation action and adsorption action) and biological action (plant absorption action and microorganism absorption and accumulation action). Phosphate precipitates generated by physical action and chemical action can aggravate the blockage of the constructed wetland, so that the overall removal function of the wetland is reduced, the dephosphorization effect of the constructed wetland biological method is unstable and is greatly influenced by the environment, the operation management is more complex, and if plants in the later growth stage are not harvested in time, the generated plant residues can increase the concentration of phosphorus in the effluent after being input into the constructed wetland. The problems lead to the common problem of low phosphorus removal efficiency in the existing artificial wetland technology in China, the treated water quality often cannot reach the discharge standard, and the secondary phosphorus removal treatment often increases the investment cost and increases the operation and maintenance burden of the artificial wetland.
On the other hand, once-popular rural biogas generating pools are gradually abandoned in the urbanization process, leaving a large amount of waste gas pools, which can affect the environment if not being utilized properly.
Disclosure of Invention
The invention aims to solve the problems and provides a reinforced dephosphorization combined artificial wetland system utilizing a rural biogas digester.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an utilize dephosphorization combination constructed wetland system of reinforceing of rural methane-generating pit, is including the water distribution canal unit, methane-generating pit unit and the catchment canal unit that connect gradually, the water distribution canal unit include the water distribution canal, water distribution canal bottom is equipped with aeration systems, aeration systems top just is located the water distribution canal and has set firmly the filler fixed plate, is equipped with the little electrolysis of iron carbon filler on the filler fixed plate, the water distribution canal in and be located the little electrolysis of iron carbon filler top and be equipped with first planting cystosepiment, water distribution canal top one side is equipped with inhalant canal, water distribution canal top opposite side is through first water channel connection methane-generating pit unit, methane-generating pit unit include the methane-generating pit, top-down is equipped with planting layer, packing layer and cobble layer in the methane-generating pit, the cobble layer pass through second water channel and connect the water channel unit.
Furthermore, the aeration system comprises an air pump positioned outside the water distribution channel, the air pump is connected with an aeration network pipe positioned at the bottom of the water distribution channel, and a plurality of aeration heads are arranged on the aeration network pipe.
Furthermore, the aeration net pipe comprises a rectangular aeration frame, a plurality of aeration pipes which are parallel to each other are arranged in the aeration frame, and a plurality of aeration heads are respectively arranged on the aeration frame and the aeration pipes.
Furthermore, the iron-carbon micro-electrolysis filler is formed by bonding sponge iron, biochar and polyurethane.
Further, the preparation method of the iron-carbon micro-electrolysis filler comprises the following steps:
1) crushing sponge iron to below 0.74 mu m for later use;
2) dividing wetland plants into 1-1.5cm pieces, and firing in a muffle furnace at 300 ℃ for one hour by taking nitrogen as protective gas to prepare biochar with the diameter of less than 0.1mm, wherein the wetland plants are one or more of myriophyllum viridissimum, acorus calamus, reed, arundo donax and saxifraga stolonifera;
3) according to the mass ratio, sponge iron: biochar: polyurethane 3: 1: 4 bonding to prepare granular filler with the diameter of 3-10mm, mixing, transferring into a muffle furnace, and firing for 2-4 hours at 300 ℃ by taking nitrogen as protective gas;
4) and after the filler is fired, cooling to room temperature, and pressing to form the iron-carbon micro-electrolysis filler, wherein the porosity of the iron-carbon micro-electrolysis filler is 56%.
Furthermore, a plurality of baffle plates which are arranged in a staggered mode are arranged in the water distribution channel, and the water distribution channel is divided into a plurality of independent water passing areas which are communicated end to end by the baffle plates.
Furthermore, a water distribution mesh pipe connected with the first water passing channel is arranged in the packing layer, and the packing layer is composed of fly ash and calcium carbonate according to the mass ratio of 1: 1.
Furthermore, the first water passage and the second water passage are positioned at two sides of the methane tank, the first planting foam board is planted with the myriophyllum viridis and/or the calamus flavus, and the planting layer is planted with the reed and/or the arundo donax.
Furthermore, the water collecting channel unit comprises a water collecting channel, one side of the top of the water collecting channel is connected with the methane tank through a second water channel, the other side of the top of the water collecting channel is provided with a water outlet channel, the top of the water collecting channel is provided with a second foam planting plate, the second foam planting plate is planted with the myriophyllum viridissimum and/or the mullet grass, and the water collecting channel is internally provided with a plurality of fly ash fillers.
Further, the fly ash filler is composed of fly ash and calcium carbonate according to the mass ratio of 1:1, the fly ash filler is made into particles, the particle size of the particles is 3-5mm, and the particles are pressed into a cube shape.
Compared with the prior art, the invention has the advantages that:
(1) according to the invention, the constructed wetland is established by the waste methane tank, the iron-carbon microelectrolysis dephosphorization filler, the fly ash filler and the phosphorus-loving aquatic plant combination are added to the methane tank, the water distribution channel and the water collecting channel, and the phosphorus removal efficiency of the constructed wetland is improved by combining the technical means of physical, chemical and biological combined dephosphorization.
Iron-carbon micro-electrolysis filler and phosphorus-loving plant adsorption are applied in the water distribution channel to absorb most of phosphorus, fly ash filler and phosphorus-loving plant adsorption are applied in the water collection channel to absorb extra phosphorus accumulation in the artificial wetland treatment process, and further guarantee that the treated water energy reaches the discharge standard.
(2) The iron-carbon micro-electrolysis filler used in the invention is prepared by taking sponge iron and wetland plants as raw materials, so that the raw material cost is greatly reduced, the harvested wetland plants are effectively recycled, and the resource utilization of the wetland plants is realized.
(3) Because the invention removes phosphorus in blocks, iron-carbon microelectrolysis and phosphorus-loving plant adsorption are applied in the main part of phosphorus removal distribution ditch to absorb most of phosphorus, the fly ash filler and phosphorus-loving plant adsorption are applied in the water collecting ditch to absorb extra phosphorus accumulation in the artificial wetland treatment process, further ensuring that the treated water energy reaches the discharge standard,
(4) the invention strengthens the dephosphorization function of the artificial wetland by combining physical, chemical and biological methods, fully utilizes the original space of the wetland and reduces the construction cost of the wetland. The method can be widely applied to dephosphorization of domestic sewage, relieves the pressure of environmental pollution, and has strong environmental benefit.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
Fig. 1 is a schematic cross-sectional view of the present invention.
Fig. 2 is a schematic sectional view of the water distribution channel unit.
Fig. 3 is a schematic cross-sectional view of a header channel unit.
Fig. 4 is a schematic structural diagram of the present invention.
Fig. 5 is a schematic structural diagram of the aeration mesh tube.
In the figure: the device comprises a water distribution channel unit 1, a methane tank unit 2, a water collection channel unit 3, a water distribution channel 4, an aeration system 5, a filler fixing plate 6, an iron-carbon micro-electrolysis filler 7, a first planting foam plate 8, a water inlet channel 9, a first water passing channel 10, a methane tank 11, a planting layer 12, a filler layer 13, a pebble layer 14, a second water passing channel 15, an air pump 16, an aeration net pipe 17, an aeration head 18, an aeration frame 19, an aeration pipe 20, a baffle plate 21, an independent water passing area 22, a water distribution net pipe 23, a water collection channel 24, a water outlet channel 25, a second foam planting plate 26 and a fly ash filler 27.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention.
As shown in fig. 1-2 and fig. 4, the present invention provides a reinforced dephosphorization combined artificial wetland system using rural biogas digester, comprising a water distribution channel unit 1, a biogas digester unit 2 and a water collection channel unit 3 which are connected in sequence, wherein the water distribution channel unit 1 comprises a water distribution channel 4, an aeration system 5 is arranged at the bottom of the water distribution channel 4, a filler fixing plate 6 is fixedly arranged above the aeration system 5 and in the water distribution channel 4, the filler fixing plate 6 can be erected at the bottom of the water distribution channel through a bracket or directly fixed at the side edge of the water distribution channel 4, an iron-carbon microelectrolysis filler 7 is arranged on the filler fixing plate 6, a first planting foam plate 8 is arranged in the water distribution channel 4 and above the iron-carbon microelectrolysis filler 7, the first planting foam plate 8 is a plastic foam plate and provided with planting holes for planting phosphorus-loving aquatic plants, a water inlet channel 9 is arranged at one side of the top of the water distribution channel 4, the other side of the top of the water distribution channel 4 is connected with a methane tank unit 2 through a first water passage 10, the methane tank unit 2 comprises a methane tank 11, a planting layer 12, a packing layer 13 and a pebble layer 14 are arranged in the methane tank 11 from top to bottom, and the pebble layer 14 is connected with the water collection channel unit 3 through a second water passage 15. A water distribution pipe connected with the first water passing channel 10 is arranged in the planting layer 12.
The planting layer 12 is 10cm thick and is formed by laying planting soil; the thickness of the packing layer 13 is 120cm, and the grain diameter of the packing is 3 mm-5 mm; the thickness of the pebble layer 14 of the substrate is 20cm, and the particle diameter of the pebbles is 20 mm-40 mm. The filler layer is a filler formed by fly ash or slag.
The water distribution channel 4 is internally provided with a gravel layer, the laying thickness of the bottom gravel layer is 10 cm-20 cm, the side gravel layers are laid according to a trapezoid, the length of the upper bottom of the trapezoid is 5-7 cm, the length of the lower bottom of the trapezoid is 15 cm-21 cm, and the particle size of gravel is 10 mm-20 mm. The height of the iron-carbon micro-electrolysis filler 7 is 35-40 cm, and the particle size of the filler is 10-30 mm.
In this embodiment, there may be a plurality of biogas digesters 11, which are arranged in parallel.
Referring to fig. 3, the water collecting channel unit 3 includes a water collecting channel 24, one side of the top of the water collecting channel 24 is connected to the methane tank 11 through a second water passage 15, the other side of the top of the water collecting channel 24 is provided with a water outlet passage 25, the top of the water collecting channel 24 is provided with a second foam planting plate 26, the second foam planting plate 26 is a plastic foam plate and is provided with planting holes, and foxtail green algae and/or mullet are planted in the planting holes of the second foam planting plate 26, and the density of the foxtail green algae and/or mullet is 6 clusters/m2In each cluster of 3 plants, a plurality of fly ash fillers 27 are arranged in the water collecting channel 24. The myriophyllum viridis and the mullet have developed root systems, grow rapidly, and can absorb high-concentration nitrogen and phosphorus, and the combined planting enables a wetland system to keep a high-efficiency plant absorption mechanism.
The fly ash filler 27 is composed of fly ash and calcium carbonate according to the mass ratio of 1:1, and is prepared into particles, the particle size of the particles is 3-5mm, the particles are pressed into a cube shape, the cube shape can be framed, and a handle is arranged, so that the replacement is convenient. The active agent and modifier combined filler has a large amount of phosphorus adsorption potential substances
The bottom layer of the water collecting channel 24 is provided with a gravel layer, the fly ash filler 27 is pressed on the gravel layer, the laying thickness of the gravel layer is 30-60 cm, the side gravel layer is laid according to a trapezoid, the upper bottom length of the trapezoid is 5-7 cm, the lower bottom length is 15-21 cm, and the particle size of the gravel is 10-20 mm.
The aeration system 5 comprises an air pump 16 positioned outside the water distribution channel 4, the air pump 16 is connected with an aeration network pipe 17 positioned at the bottom of the water distribution channel 4, and a plurality of aeration heads 18 are arranged on the aeration network pipe 17.
Referring to fig. 5, the aeration net pipe 17 includes a rectangular aeration frame 19, a plurality of parallel aeration pipes 20 are arranged in the aeration frame 19, and a plurality of aeration heads 18 are respectively arranged on the aeration frame 19 and the aeration pipes 20. The aeration head 18 extends out of the gravel layer at the bottom layer and is positioned below the iron-carbon micro-electrolysis filler 7. The air pump 16 controls the time and interval of aeration to realize an intermittent aeration working mode.
In the present embodiment, the iron-carbon micro-electrolysis filler 7 is formed by bonding sponge iron, biochar and polyurethane.
Specifically, the method for manufacturing the iron-carbon micro-electrolysis filler 7 comprises the following steps:
s1, crushing sponge iron to be below 0.74 mu m for later use; s2, dividing the wetland plants into 1-1.5cm pieces, firing the pieces in a muffle furnace for one hour at 300 ℃ by taking nitrogen as protective gas to prepare biochar with the diameter of less than 0.1mm, wherein the wetland plants are one or more of myriophyllum pratense, calamus flavus, reed, bamboo grass leaves and mullein, and the wetland plants are plants with large biomass and developed fibrous root systems, so that the removal of nutritive salts in sewage by the plants can be improved, and the blockage of the wetland caused by rotting of underground root systems in winter can be avoided; s3, preparing sponge iron according to the mass ratio: biochar: polyurethane 3: 1: 4 bonding to prepare granular filler with the diameter of 3-10mm, mixing, transferring into a muffle furnace, and firing for 2-4 hours at 300 ℃ by taking nitrogen as protective gas; and S4, cooling to room temperature after the filler is fired, and pressing to form the iron-carbon micro-electrolysis filler, wherein the porosity of the iron-carbon micro-electrolysis filler is 56%.
When the iron-carbon micro-electrolysis filler 7 is used for treating sewage, a large amount of micro-electrolysis systems are formed due to the 1.23V electrode potential difference between Fe and C, and a large amount of Fe is produced by anode reaction2+Enters waste water and is oxidized into Fe3+And has high adsorption and flocculation activity. The specific principle is as follows:
anode: fe-2e-→Fe2+ φ0(Fe2+/Fe)＝-0.44V
Cathode: 2H++2e-→H2 φ0(H+/H2)＝0.00V
O2+4H++4e-→2H2O φ0(O2)＝1.23V
O2+2H2O+4e-→4OH- φ0(O2)＝0.40V
The filler is sintered and regularly molded, the structured filler is contacted with the cathode and the anode in a reinforcing way, the problems of separation and hardening are effectively avoided, and a large number of micro primary cells are arranged on the surface of the sintered and regularly molded filler, so that the phosphorus removal performance is enhanced.
Referring to fig. 4, a plurality of baffles 21 are arranged in the water distribution channel 4 in a staggered manner, and the baffles 21 divide the water distribution channel 4 into a plurality of independent water passing areas 22 which are communicated with each other end to end. In the embodiment, the length-width ratio of the water distribution channel is about 4:1, and the height of the water distribution channel is 1.0m, and the baffle plate 21 is provided with 6 blocks, so that the water distribution channel is divided into 7 rectangular areas which are communicated with each other.
A water distribution net pipe 23 connected with the first water passing channel 10 is arranged in the packing layer 13, water outlet holes are arranged on the water distribution net pipe 23, and the packing layer 13 is composed of fly ash and calcium carbonate according to the mass ratio of 1: 1. The fly ash and the calcium carbonate are mixed and then made into particles with the particle size of 3 mm-5 mm.
The first water passing channel 10 and the second water passing channel 15 are positioned at two sides of the methane tank 11, the first planting foam board 8 is planted with the myriophyllum viridis and/or the calamus flavus, and the planting layer 12 is planted with the reed and/or the floral leaf reed.
The sewage firstly enters the water distribution channel 4 through the water inlet channel 9, and the water inlet is provided with a filtering grid for intercepting large-volume inorganic and organic wastes in the sewage.
The pretreated domestic sewage passes through the water distribution channel 4, and the phosphorus in the sewage is primarily treated under the combined action of the iron-carbon micro-electrolysis filler 7 and the phosphorus removal plant in the water distribution channel: the surface of the sintered iron-carbon micro-electrolysis filler 7 is provided with a large number of micro-primary cells, and under the reinforcement of aeration, phosphorus can be removed through micro-electrolysis, and meanwhile, the stability of the bonded filler is improved, so that the phosphorus removal effect by physical adsorption is further reinforced; the phosphorus-loving plant composition (such as Selaginella viridis, Acorus calamus and grass of Ctenocephalides) has developed root system, can grow rapidly, can absorb high-concentration nitrogen and phosphorus, and can further reduce the phosphorus concentration in sewage after being combined with the filler. The sewage after the primary dephosphorization flows into the constructed wetland after the methane tank 11 is modified to remove conventional pollutants (COD, ammonia nitrogen, total nitrogen and the like), then flows into the enhanced dephosphorization water collecting channel 24 again, and continues to remove additional phosphorus accumulation generated in the treatment process of the constructed wetland after the methane tank 11 is modified under the combined action of the fly ash filler and the dephosphorization plants, and flows out of the system after reaching the water quality discharge standard.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit of the invention.

Claims (10)

1. An enhanced dephosphorization combined artificial wetland system utilizing a rural methane tank comprises a water distribution channel unit (1), a methane tank unit (2) and a water collection channel unit (3) which are sequentially connected, and is characterized in that the water distribution channel unit (1) comprises a water distribution channel (4), an aeration system (5) is arranged at the bottom of the water distribution channel (4), a filler fixing plate (6) is fixedly arranged above the aeration system (5) and positioned in the water distribution channel (4), an iron-carbon microelectrolysis filler (7) is arranged on the filler fixing plate (6), a first planting foam plate (8) is arranged in the water distribution channel (4) and positioned above the iron-carbon microelectrolysis filler (7), a water inlet channel (9) is arranged on one side of the top of the water distribution channel (4), the other side of the top of the water distribution channel (4) is connected with the methane tank unit (2) through a first water channel (10), the methane tank unit (2) comprises a methane tank (11), a planting layer (12), a packing layer (13) and a pebble layer (14) are arranged in the methane tank (11) from top to bottom, and the pebble layer (14) is connected with the water collecting channel unit (3) through a second water passage (15).
2. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 1, wherein the aeration system (5) comprises an air pump (16) positioned outside the water distribution channel (4), the air pump (16) is connected with an aeration network pipe (17) positioned at the bottom of the water distribution channel (4), and a plurality of aeration heads (18) are arranged on the aeration network pipe (17).
3. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 2, wherein the aeration network pipe (17) comprises a rectangular aeration frame (19), a plurality of aeration pipes (20) which are parallel to each other are arranged in the aeration frame (19), and a plurality of aeration heads (18) are respectively arranged on the aeration frame (19) and the aeration pipes (20).
4. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 1, wherein the iron-carbon micro-electrolysis filler (7) is formed by bonding sponge iron, biochar and polyurethane.
5. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 4, wherein the iron-carbon micro-electrolysis filler (7) is prepared by the following method:
1) crushing sponge iron to below 0.74 mu m for later use;
2) dividing wetland plants into 1-1.5cm pieces, and firing in a muffle furnace at 300 ℃ for one hour by taking nitrogen as protective gas to prepare biochar with the diameter of less than 0.1mm, wherein the wetland plants are one or more of myriophyllum viridissimum, acorus calamus, reed, arundo donax and saxifraga stolonifera;
3) according to the mass ratio, sponge iron: biochar: polyurethane 3: 1: 4 bonding to prepare granular filler with the diameter of 3-10mm, mixing, transferring into a muffle furnace, and firing for 2-4 hours at 300 ℃ by taking nitrogen as protective gas;
4) and after the filler is fired, cooling to room temperature, and pressing to form the iron-carbon micro-electrolysis filler, wherein the porosity of the iron-carbon micro-electrolysis filler is 56%.
6. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 1, wherein a plurality of baffle plates (21) are arranged in the water distribution channel (4) in a staggered manner, and the water distribution channel (4) is divided into a plurality of independent water passing areas (22) which are communicated end to end by the baffle plates (21).
7. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 1, wherein a water distribution network pipe (23) connected with the first water passing channel (10) is arranged in the packing layer (13), and the packing layer (13) is composed of fly ash and calcium carbonate according to the mass ratio of 1: 1.
8. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 1, wherein the first water passing channel (10) and the second water passing channel (15) are positioned at two sides of the biogas digester (11), the first planting foam board (8) is planted with myriophyllum viridissimum and/or Acorus calamus, and the planting layer (12) is planted with reed and/or Arundo donax.
9. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 8, wherein the water collection channel unit (3) comprises a water collection channel (24), one side of the top of the water collection channel (24) is connected with the biogas digester (11) through a second water channel (15), the other side of the top of the water collection channel (24) is provided with a water outlet channel (25), the top of the water collection channel (24) is provided with a second foam planting plate (26), the second foam planting plate (26) is planted with armyworm green algae and/or mullein, and the water collection channel (24) is internally provided with a plurality of fly ash fillers (27).
10. The enhanced phosphorus removal combined artificial wetland system utilizing the rural biogas digester as claimed in claim 9, wherein the fly ash filler (27) is composed of fly ash and calcium carbonate according to a mass ratio of 1:1, and is made into particles, the particle size of the particles is 3-5mm, and the particles are pressed into a cube shape.
CN202110595241.5A 2021-05-28 2021-05-28 Enhanced dephosphorization combined artificial wetland system utilizing rural biogas digester Pending CN113213706A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113979515A (en) * 2021-10-27 2022-01-28 沈阳建筑大学 Iron-carbon micro-electrolysis particles for sewage treatment and preparation method thereof
CN114314850A (en) * 2021-12-29 2022-04-12 上海市政工程设计研究总院（集团）有限公司 Constructed wetland deep purification device and method for high-salt refractory organic wastewater

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102942253A (en) * 2012-10-31 2013-02-27 江苏大学 Constructed wetland sewage treatment method and system
CN106608674A (en) * 2015-10-23 2017-05-03 北京瑞蓝科工程技术有限公司 Phosphorus-removing filler and preparation method thereof
CN206476812U (en) * 2017-02-07 2017-09-08 长丰县环境监测站 A kind of compound flow artificial marsh sewage treatment system
CN107473388A (en) * 2017-08-29 2017-12-15 南昌工程学院 Intensified denitrification and dephosphorization integrated constructed wetland system and its method for handling sewage
CN210287078U (en) * 2019-07-11 2020-04-10 广东河海工程咨询有限公司 Assembled river course point source pollutes normal position processing apparatus
CN111333273A (en) * 2020-03-20 2020-06-26 广州市绿化公司 Enhanced nitrogen and phosphorus removal constructed wetland system
CN112125405A (en) * 2020-09-02 2020-12-25 浙江问源环保科技股份有限公司 Composite artificial wetland system and operation method thereof

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102942253A (en) * 2012-10-31 2013-02-27 江苏大学 Constructed wetland sewage treatment method and system
CN106608674A (en) * 2015-10-23 2017-05-03 北京瑞蓝科工程技术有限公司 Phosphorus-removing filler and preparation method thereof
CN206476812U (en) * 2017-02-07 2017-09-08 长丰县环境监测站 A kind of compound flow artificial marsh sewage treatment system
CN107473388A (en) * 2017-08-29 2017-12-15 南昌工程学院 Intensified denitrification and dephosphorization integrated constructed wetland system and its method for handling sewage
CN210287078U (en) * 2019-07-11 2020-04-10 广东河海工程咨询有限公司 Assembled river course point source pollutes normal position processing apparatus
CN111333273A (en) * 2020-03-20 2020-06-26 广州市绿化公司 Enhanced nitrogen and phosphorus removal constructed wetland system
CN112125405A (en) * 2020-09-02 2020-12-25 浙江问源环保科技股份有限公司 Composite artificial wetland system and operation method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
王昊等: "《潜流型人工湿地深度处理污水厂二级出水的研究》", 31 December 2017, 哈尔滨工程大学出版社 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113979515A (en) * 2021-10-27 2022-01-28 沈阳建筑大学 Iron-carbon micro-electrolysis particles for sewage treatment and preparation method thereof
CN113979515B (en) * 2021-10-27 2023-09-22 沈阳建筑大学 Iron-carbon micro-electrolysis particle for sewage treatment and preparation method thereof
CN114314850A (en) * 2021-12-29 2022-04-12 上海市政工程设计研究总院（集团）有限公司 Constructed wetland deep purification device and method for high-salt refractory organic wastewater

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Application publication date: 20210806