CN111943358B - Sustainable artificial ecological floating bed capable of operating efficiently all day and working method thereof - Google Patents
Sustainable artificial ecological floating bed capable of operating efficiently all day and working method thereof Download PDFInfo
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- CN111943358B CN111943358B CN202010684190.9A CN202010684190A CN111943358B CN 111943358 B CN111943358 B CN 111943358B CN 202010684190 A CN202010684190 A CN 202010684190A CN 111943358 B CN111943358 B CN 111943358B
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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
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/007—Contaminated open waterways, rivers, lakes or ponds
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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
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/10—Photocatalysts
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- 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
- Y02W10/30—Wastewater or sewage treatment systems using renewable energies
- Y02W10/37—Wastewater or sewage treatment systems using renewable energies using solar energy
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Abstract
The invention discloses a sustainable artificial ecological floating bed capable of running efficiently all day long, which comprises two floating plates, wherein aquatic plants are arranged on the floating plates, a main reaction tank is connected below the floating plates, biological fillers and a photocatalyst are arranged in the main reaction tank, a main pipeline is communicated between the two main reaction tanks, main filter membrane valves are respectively arranged at two ends of the main pipeline, an auxiliary reaction tank is connected below the main reaction tank, a conductive material is arranged in the auxiliary reaction tank, a main and auxiliary filter membrane valve is arranged on a pipeline between the main reaction tank and the auxiliary reaction tank, an auxiliary pipeline is communicated between the two auxiliary reaction tanks, and auxiliary filter membrane valves are respectively arranged at two ends of the auxiliary pipeline. The sustainable artificial ecological floating bed capable of efficiently operating all day and the working method thereof provided by the invention can overcome the defect that the photocatalyst in the prior art is only limited to the utilization of solar energy under continuous irradiation, and realize stable and continuous operation of the photocatalyst all day.
Description
Technical Field
The invention relates to a sustainable artificial ecological floating bed capable of efficiently operating all day and a working method thereof, belonging to the technical field of river restoration.
Background
With the rapid development of modern society, a large amount of industrial and agricultural wastewater discharged into natural water bodies causes an increase in the concentration of nitrogen, particularly nitrate, in water environments. Excessive accumulation of nitrate can cause a series of environmental problems such as water eutrophication and the like. In addition, if the drinking water source is polluted, the drinking water source can pose a great threat to human health, such as high risk of diseases of infant methemoglobinemia, gastric cancer and the like. Thus, effective removal of nitrate from water has become an urgent need to be addressed.
At present, methods for removing nitrate by physical chemistry comprise aeration, chemical oxidation, ion exchange, membrane filtration and the like, and have the advantages of simple process, convenient operation, good adaptability and the like. However, in practical application, these methods have certain limitations due to high operation cost and possibility of causing secondary pollution. On the other hand, the biological method for removing nitrate is widely applied due to the advantages of low cost, environmental friendliness and the like. Traditional biological methods for nitrate removal rely on Chemical Oxygen Demand (COD), a combination of electron acceptors and electron donors provided by organics in the water. However, COD is hardly utilized in the denitrification process because oxidation of nitrate and nitrite requires consumption of a large amount of COD in the presence of an electron acceptor, resulting in insufficient COD and reduced nitrate removal effect. One of the methods adopted to improve the efficiency of biological nitrate removal is the artificial addition of organic carbon sources, which is however costly and results in the typical greenhouse gas nitrous oxide (N)2O) accumulated windAnd (5) performing danger. Fortunately, microorganisms have been shown to take electrons from natural solid donors to reduce electron acceptors. Therefore, a coupled technology, i.e., a method for improving denitration performance by combining a conventional biological denitration technology with other technologies, attracts attention.
In recent years, the coupling of the combination of biological denitrification and photocatalysis is a novel technology. In coupled systems, the microorganisms accept electrons from the photocatalytic system to promote their own metabolism, thereby accelerating the rate of nitrate reduction. The reasonable design of the photocatalytic reactor is one of the key technologies for realizing the practicability of the coupling technology. However, the existing photocatalytic reactor for river water restoration has a problem that the existing photocatalyst is limited to the use of solar energy under continuous irradiation, and when the irradiation of light is stopped, the photocatalytic process is stopped in a short time due to the stop of the generation of electron holes in the semiconductor. Therefore, the key problem that the photocatalytic biological denitrification can be widely applied is that the photocatalytic material can still maintain the photocatalytic performance in dark environment.
Disclosure of Invention
The invention aims to solve the technical problem of providing a sustainable artificial ecological floating bed which can overcome the defect that the photocatalyst in the prior art is only limited to the utilization of solar energy under continuous irradiation and realize the stable and continuous operation of the photocatalyst all day long and the efficient operation all day long and a working method thereof.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the utility model provides a sustainable artificial ecology of high-efficient operation throughout the day floats bed, includes two kickboards, be provided with aquatic plant on the kickboard, even there is main reaction tank below the kickboard, be provided with biofilm carrier and photocatalyst, two in the main reaction tank intercommunication has the trunk line between the main reaction tank, the both ends of trunk line are provided with main filter membrane valve respectively, even there is vice reaction tank under the main reaction tank, be provided with conducting material in the vice reaction tank, the main reaction tank with be provided with main and vice filter membrane valve on the pipeline between the vice reaction tank, two the intercommunication has the auxiliary conduit between the vice reaction tank, the both ends of auxiliary conduit are provided with vice filter membrane valve respectively.
The two ends of the floating plate are connected with one end of a metal chain, the other end of the metal chain is connected with a movable metal ring, the movable metal ring is sleeved on a fixed rod, and the lower end of the fixed rod is embedded in sediment at the bottom of a river.
The lower surface of the floating plate is connected with the upper surface of the main reaction tank by a metal chain.
The main reaction tank and the auxiliary reaction tank are made of acrylic plates.
The main reaction tank is vertically suspended below the floating plate.
A sustainable artificial ecological floating bed working method capable of running efficiently all day long comprises the following steps: in the first working day of the day,
s01, opening a main filter membrane valve and an auxiliary filter membrane valve on the auxiliary reaction tank of the left chamber in the daytime, wherein the stored conductive material is in contact with the photocatalyst in the main reaction tank of the left chamber, and releasing electrons to promote the denitrification and dephosphorization of microorganisms under the condition of continuous illumination;
s02, the secondary filter membrane valve of the secondary reaction tank of the right chamber is in a closed state, and the photocatalyst in the main reaction tank of the right chamber only stores solar energy and carries out photosynthesis of plants under the condition of no conductive material;
s03, when the continuous illumination disappears at night, a main filter membrane valve between the left chamber main reaction tank and the main pipeline is opened, and the conductive material is discharged into the main pipeline under the action of the filter membrane and enters the right chamber main reaction tank;
s04, the solar energy stored in the photocatalyst in the right chamber main reaction tank is released under the action of the conductive material, and the electrons are released under the condition of no continuous illumination to promote the denitrification and dephosphorization of the microorganisms.
On the second working day, the right chamber main reactor is functionally exchanged with the left chamber main reactor, and the processes from S01 to S04 on the first working day are repeated.
Every two working days is a cycle.
The invention has the beneficial effects that: the invention/the invention provides a sustainable artificial ecological floating bed which runs efficiently all day long and a working method thereof, the system comprises a non-metal catalytic material, root microorganisms and green aquatic plants, and the sustainable artificial ecological floating bed has the advantages of environmental protection; the water body remediation is efficient, namely the catalysis of the photocatalyst, the denitrification and dephosphorization of microorganisms and the plant absorption are synergistically coupled; sunlight is utilized and stored through the dark photocatalyst, and the plant immobilized catalyst solves the recycling problem and can be sustainable; the system runs stably all day long, realizes the synergistic denitrification and dephosphorization of catalytic materials, root microorganisms and aquatic plants, and obviously improves the denitrification and purification efficiency and stability of the system.
Drawings
FIG. 1 is a schematic structural diagram of a sustainable artificial ecological floating bed which can run efficiently all day long according to the present invention;
fig. 2 is a diagram of the effect of the sustainable artificial ecological floating bed which operates efficiently all day long on removing nitrogen and phosphorus in river water.
The reference numbers in the figures are as follows: 1-a main reaction tank; 2-floating plate; 3-aquatic plants; 4-biological filler and photocatalyst; 5-fixing the rod; 6-a movable metal ring; 7-a metal chain; 8-side reaction tank; 9-a main pipeline; 10-secondary pipe; 11-water surface; 12-river bottom sediment; 13-a primary filter membrane valve; 14-primary and secondary filter membrane valves; 15-auxiliary filter membrane valve.
Detailed Description
The present invention is further described with reference to the accompanying drawings, and the following examples are only for clearly illustrating the technical solutions of the present invention, and should not be taken as limiting the scope of the present invention.
As shown in figure 1, the invention provides a sustainable artificial ecological floating bed capable of running efficiently all day long, which is formed by mutually connecting floating bed units, pipelines and brackets. The two floating bed units are a pair of reaction units. The floating bed unit comprises a floating plate 2, two ends of the floating plate 2 are connected with one end of a metal chain 7, the other end of the metal chain 7 is connected with a movable metal ring 6, the movable metal ring 6 is sleeved on a fixed rod 5, and the lower end of the fixed rod 5 is embedded in a sediment 12 at the bottom of a river. When the water level changes, the floating bed unit can move up and down on the fixed rod 5 through the movable metal ring 6 to change along with the change of the water level, and meanwhile, the floating bed unit can be limited in a fixed area without affecting the normal function.
The main pipeline 9 is communicated between the two main reaction tanks 1, the two ends of the main pipeline 9 are respectively provided with a main filter membrane valve 13, the auxiliary reaction tank 8 is connected below the main reaction tank 1, and the main reaction tank 1 and the auxiliary reaction tank 8 are made of acrylic plates. The secondary reaction tank 8 is internally provided with a conductive material, a main and secondary filter membrane valve 14 is arranged on a pipeline between the main reaction tank 1 and the secondary reaction tank 8, a secondary pipeline 10 is communicated between the two secondary reaction tanks 8, and the two ends of the secondary pipeline 10 are respectively provided with a secondary filter membrane valve 15.
The invention relates to a sustainable artificial ecological floating bed working method capable of running efficiently all day, which comprises the following steps:
the first working day:
step one, a main and auxiliary filter membrane valve 14 on an auxiliary reaction tank 8 of a left chamber is opened in the daytime, a stored conductive material is contacted with a photocatalyst in the main reaction tank 1 of the left chamber, and electrons are released to promote the denitrification and dephosphorization of microorganisms under the condition of continuous illumination;
step two, the secondary filter membrane valve 15 of the secondary reaction tank 8 of the right chamber is in a closed state, and the photocatalyst in the main reaction tank 1 of the right chamber only stores solar energy and performs photosynthesis of plants under the condition of no conductive material;
when the continuous illumination disappears at night, a main filter membrane valve 13 between the left-chamber main reaction tank 1 and the main pipeline 9 is opened, and the conductive material is discharged into the main pipeline 9 under the action of the filter membrane and enters the right-chamber main reaction tank 1;
and step four, the solar energy stored in the photocatalyst in the right chamber main reaction tank 1 is released under the action of the conductive material, and the electrons are released under the condition of no continuous illumination to promote the denitrification and dephosphorization of the microorganisms.
The second working day: and (4) functionally exchanging the right chamber main reactor with the left chamber main reactor, and repeating the processes from the first step to the second step in the first working day. The right chamber main reaction tank 1 in the reaction unit replaces the function of the left chamber main reaction tank 1 in the first working day, and the electrons are released under the condition of continuous illumination to promote the denitrification and dephosphorization of microorganisms and simultaneously carry out the photosynthesis of aquatic plants. The left side reaction tank 8 is closed, and the dark photocatalyst in the left side reaction tank 8 only stores solar energy without conductive material. When the continuous illumination disappears at night, a main and auxiliary filter membrane valve 14 between the right chamber main reaction tank 1 and the auxiliary reaction tank 8 is opened, conductive materials are discharged into the right chamber auxiliary reaction tank 8 under the action of the filter membrane and enter the left chamber auxiliary reaction tank 8 under the action of pressure. At the moment, the solar energy stored in the dark photocatalyst in the left-room main reaction tank 1 is released under the action of the conductive material, and the electrons are released under the condition of no continuous illumination to promote the denitrification and dephosphorization of the microorganisms.
In the invention, every two working days are a periodic cycle, the sampling is respectively carried out at the inlet and the outlet of the reactor, 3 repeated water samples are respectively taken at each port, the water samples are taken once every 1 day, and the sampling is finished after the reactor continuously runs for 7 days. Two common water pollutants of nitrogen and phosphorus are selected as representatives, and the embodiment results are shown in fig. 2, so that the removal efficiency of the sustainable artificial ecological floating bed which efficiently operates all day to nitrogen and phosphorus in river water is respectively over 80% and 90%. In addition, in continuous repeated experiments, the removal efficiency is not greatly fluctuated, and the effect is stable.
The above description is only of the preferred embodiments of the present invention, and it should be noted that: it will be apparent to those skilled in the art that various modifications and adaptations can be made without departing from the principles of the invention and these are intended to be within the scope of the invention.
Claims (7)
1. A sustainable artificial ecological floating bed working method capable of running efficiently all day long is characterized in that: adopt sustainable artificial ecology to float the bed, sustainable artificial ecology floats the bed and includes two kickboards (2), be provided with aquatic plant (3) on kickboard (2), even there are main reaction tank (1) below kickboard (2), be provided with biofilm carrier and photocatalyst (4) in main reaction tank (1), two intercommunication has trunk line (9) between main reaction tank (1), the both ends of trunk line (9) are provided with main filtration membrane valve (13) respectively, even have vice reaction tank (8) under main reaction tank (1), be provided with conducting material in vice reaction tank (8), be provided with main and vice filtration membrane valve (14) on the pipeline between main reaction tank (1) and vice reaction tank (8), two intercommunication has vice pipeline (10) between vice reaction tank (8), the both ends of vice pipeline (10) are provided with vice filtration membrane valve (15) respectively, the photocatalyst is a dark photocatalyst with a solar energy storage function;
the method comprises the following steps: in the first working day of the day,
s01, opening a main filter membrane valve and an auxiliary filter membrane valve (14) on an auxiliary reaction tank (8) of the left chamber in the daytime, wherein the stored conductive material is in contact with a photocatalyst in the main reaction tank (1) of the left chamber, and releasing electrons to promote the denitrification and dephosphorization of microorganisms under the condition of continuous illumination;
s02, the secondary filter membrane valve (15) of the secondary reaction tank (8) of the right chamber is in a closed state, and the photocatalyst in the main reaction tank (1) of the right chamber only stores solar energy and carries out photosynthesis of plants under the condition of no conductive material;
s03, when the continuous illumination disappears at night, a main filter membrane valve (13) between the left chamber main reaction tank (1) and the main pipeline (9) is opened, and the conductive material is discharged into the main pipeline (9) under the action of the filter membrane and enters the right chamber main reaction tank (1);
s04, the solar energy stored in the photocatalyst in the right chamber main reaction tank (1) is released under the action of the conductive material, and the electrons are released under the condition of no continuous illumination to promote the denitrification and dephosphorization of the microorganisms.
2. The working method of the sustainable artificial ecological floating bed capable of running efficiently all day long according to claim 1, characterized in that: the two ends of the floating plate (2) are connected with one end of a metal chain (7), the other end of the metal chain (7) is connected with a movable metal ring (6), the movable metal ring (6) is sleeved on the fixed rod (5), and the lower end of the fixed rod (5) is buried in a sediment (12) at the bottom of a river.
3. The working method of the sustainable artificial ecological floating bed capable of running efficiently all day long according to claim 1, characterized in that: the lower surface of the floating plate (2) is connected with the upper surface of the main reaction tank (1) by a metal chain (7).
4. The working method of the sustainable artificial ecological floating bed capable of running efficiently all day long according to claim 1, characterized in that: the main reaction tank (1) and the secondary reaction tank (8) are made of acrylic plates.
5. The working method of the sustainable artificial ecological floating bed capable of running efficiently all day long according to claim 1, characterized in that: the main reaction tank (1) is vertically suspended below the floating plate (2).
6. The working method of the sustainable artificial ecological floating bed capable of running efficiently all day long according to claim 1, characterized in that: on the second working day, the right chamber main reactor is functionally exchanged with the left chamber main reactor, and the processes from S01 to S04 on the first working day are repeated.
7. The sustainable artificial ecological floating bed working method capable of operating efficiently all day long according to claim 6, wherein the sustainable artificial ecological floating bed working method comprises the following steps: every two working days is a cycle.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201195703Y (en) * | 2008-04-01 | 2009-02-18 | 中山大学 | Ecological floating bed for tidal river |
| US20130180931A1 (en) * | 2010-09-27 | 2013-07-18 | Uvcleaning Systems, Inc. | Solar-activated photochemical fluid treatment |
| CN103359834A (en) * | 2013-06-21 | 2013-10-23 | 河海大学 | Wind and light coupled oxygen-enriched nanometer matrix composite ecological floating bed |
| US20190003998A1 (en) * | 2017-06-29 | 2019-01-03 | University Of Pittsburgh - Of The Commonwealth System Of Higher Education | Graphitic carbon nitride sensors |
| CN210340474U (en) * | 2019-04-29 | 2020-04-17 | 内蒙古太伟生态建设有限公司 | Ecological floating island for restoring river channel |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201195703Y (en) * | 2008-04-01 | 2009-02-18 | 中山大学 | Ecological floating bed for tidal river |
| US20130180931A1 (en) * | 2010-09-27 | 2013-07-18 | Uvcleaning Systems, Inc. | Solar-activated photochemical fluid treatment |
| CN103359834A (en) * | 2013-06-21 | 2013-10-23 | 河海大学 | Wind and light coupled oxygen-enriched nanometer matrix composite ecological floating bed |
| US20190003998A1 (en) * | 2017-06-29 | 2019-01-03 | University Of Pittsburgh - Of The Commonwealth System Of Higher Education | Graphitic carbon nitride sensors |
| CN210340474U (en) * | 2019-04-29 | 2020-04-17 | 内蒙古太伟生态建设有限公司 | Ecological floating island for restoring river channel |
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