CN111056700A - Novel composite wetland system for repairing micro-polluted water body - Google Patents
Novel composite wetland system for repairing micro-polluted water body Download PDFInfo
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- CN111056700A CN111056700A CN201911231701.5A CN201911231701A CN111056700A CN 111056700 A CN111056700 A CN 111056700A CN 201911231701 A CN201911231701 A CN 201911231701A CN 111056700 A CN111056700 A CN 111056700A
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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
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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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
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/10—Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
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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
- C02F3/02—Aerobic processes
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/22—Improving land use; Improving water use or availability; Controlling erosion
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- Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
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- Hydrology & Water Resources (AREA)
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- Biodiversity & Conservation Biology (AREA)
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- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
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Abstract
The invention discloses a novel composite wetland system for repairing micro-polluted water, which comprises a sedimentation tank, a primary horizontal subsurface flow wetland, an aeration tank, a secondary vertical flow wetland and a water collection tank, wherein the sedimentation tank is connected with the primary horizontal subsurface flow wetland; settling the micro-polluted water body by using a settling pond to remove suspended matters in the micro-polluted water body, and allowing the micro-polluted water body treated by the settling pond to enter a primary subsurface wetland; removing algae, suspended matters and BOD in the entering micro-polluted water body by adopting a primary subsurface flow wetland, and enabling the micro-polluted water body treated by the primary subsurface flow wetland to enter an aeration tank; the dissolved oxygen concentration of the entering micro-polluted water body is improved by adopting an aeration tank, and the micro-polluted water body treated by the aeration tank enters a secondary vertical flow wetland; removing nutrient substances such as ammonia nitrogen, phosphorus, COD and the like in the entering micro-polluted water body by adopting a secondary vertical flow wetland, and enabling the micro-polluted water body treated by the secondary vertical flow wetland to enter a water collecting tank; the water collecting tank collects the entering water flow to be directly recycled or stored in the source water tank to be used as a standby water source.
Description
Technical Field
The invention belongs to the technical field of sewage treatment of micro-polluted water bodies with better water quality in water treatment, and particularly relates to a water quality purification process taking a composite artificial wetland as a main body.
Background
The constructed wetland is used as a comprehensive ecosystem, is built by utilizing the principles of species symbiosis and material circulation regeneration according to the structure and the function of a natural wetland ecosystem, and purifies water pollutants by utilizing the synergistic effect of soil, matrix, plants and microorganisms, and has the action mechanisms of sedimentation, filtration, adsorption, detention, ion exchange, microbial decomposition, transformation, plant shielding, residue accumulation, transpiration, moisture absorption, nutrient absorption and the like.
The artificial wetland can be divided into 3 types of surface flow wetland, horizontal subsurface flow wetland and vertical flow wetland according to the water flow mode. Wherein 1) the surface flow wetland mainly comprises earthwork filling and digging and plant plants, and has the advantages of simple structure, low investment, low operation cost and small silting influence; the disadvantages are low load, poor comprehensive treatment capability and heavy peculiar smell in the treatment process. 2) The sewage of the horizontal subsurface flow wetland flows horizontally in the substrate, and has the advantages of good filtering effect, little influence on the surrounding environment, high hydraulic load and good pollutant removal effect; the defects are that the reoxygenation capacity is weak, the anaerobic environment is deviated, and compared with a surface flow wetland, the construction cost and the operation cost are higher. 3) The sewage of the vertical flow wetland flows vertically and longitudinally, has the advantages of saving space and being suitable for treating the sewage with high ammonia nitrogen content; the disadvantages are short flow path and easy clogging.
The artificial wetland has limited water treatment capacity and low sewage treatment load, normal water purification all the year round is difficult to realize, and the water quality is greatly influenced by the climate environment. Under abnormal climatic conditions such as overheat weather, the water quality is difficult to ensure to be good and stable, particularly, numerical values such as ammonia nitrogen and the like exceed the standard, aquatic plants can not grow normally in cold weather in winter, the sewage treatment capacity is limited, and the stable discharge is not facilitated.
Disclosure of Invention
Aiming at the problems and the defects in the prior art, the invention provides a novel composite wetland system for repairing micro-polluted water body, which has better treatment effect, small influence of climate and stable discharge.
The invention solves the technical problems through the following technical scheme:
the invention provides a novel composite wetland system for repairing micro-polluted water, which is characterized by comprising a sedimentation tank, a primary horizontal subsurface flow wetland, an aeration tank, a secondary vertical flow wetland and a water collection tank;
the sedimentation tank is adopted to sediment the micro-polluted water body so as to remove most suspended matters in the micro-polluted water body, and the micro-polluted water body treated by the sedimentation tank enters the primary horizontal subsurface wetland;
removing algae, suspended matters, BOD and partial ammonia nitrogen in the entering micro-polluted water body by adopting the primary horizontal subsurface flow wetland, and enabling the micro-polluted water body treated by the primary horizontal subsurface flow wetland to enter an aeration tank;
the aeration and oxygenation pool is adopted to improve the dissolved oxygen concentration of the entering micro-polluted water body, and the micro-polluted water body after being enriched with oxygen in the aeration and oxygenation pool enters the secondary vertical flow wetland;
removing nutrient substances such as ammonia nitrogen, phosphorus, COD and the like in the entering micro-polluted water body by adopting the secondary vertical flow wetland, and enabling the micro-polluted water body treated by the secondary vertical flow wetland to enter a water collecting tank;
the water collecting tank collects the entering water flow to be directly recycled or stored in a source water tank to be used as a standby water source.
Preferably, the sedimentation tank comprises a sedimentation zone for removing mainly large particle suspensions in the micro-polluted water body and a physical cutoff zone for removing biofilm suspension of small particle suspensions in the micro-polluted water body.
Preferably, a filler area is arranged in the sedimentation tank.
Preferably, volcanic rock is added into the filler of the primary horizontal subsurface wetland.
Preferably, the bottom of the first-stage horizontal subsurface flow wetland is provided with a plurality of sludge discharge hoppers, and a plurality of perforated aeration pipes are arranged in the sludge discharge hoppers.
Preferably, a nano oxygen increasing device is arranged in the aeration oxygen increasing pool to increase the dissolved oxygen concentration of the entering micro polluted water body.
Preferably, the filler in the secondary vertical flow wetland adopts pebbles, ceramsite, gravel and biomass phosphorus absorption filler.
Preferably, the top of the secondary vertical flow wetland is provided with a uniform water distribution mode of a water distribution groove and a perforated pipe.
Preferably, the bottom of the secondary vertical flow wetland is provided with a plurality of perforated water collecting pipes, and a vent pipe is communicated with the perforated water collecting pipes.
On the basis of the common knowledge in the field, the above preferred conditions can be combined randomly to obtain the preferred embodiments of the invention.
The positive progress effects of the invention are as follows:
the invention improves the conventional artificial wetland for treating the micro-polluted water body, solves the defects of lower load, weaker reoxygenation capability and the like of the conventional subsurface wetland by means of pre-precipitation, primary strengthening treatment, aeration oxygenation, secondary strengthening treatment and the like, can effectively remove solid suspended matters, particularly algae, in the micro-polluted water body, and the purified water body can reach the fishery water quality standard (GB 11607-89).
Drawings
Fig. 1 is a specific repair flow chart of the novel composite wetland system according to the preferred embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The embodiment provides a novel composite wetland system for repairing micro-polluted water, which comprises a sedimentation tank, a primary horizontal subsurface flow wetland, an aeration oxygenation tank, a secondary vertical flow wetland and a water collection tank.
The specific restoration process of the novel wetland system is shown in figure 1:
1. the sedimentation tank is adopted to sediment the micro-polluted water body so as to remove most of suspended matters in the micro-polluted water body, the micro-polluted water body treated by the sedimentation tank enters the primary horizontal subsurface wetland, the TSS (suspended matter) removal rate can reach 85%, the purification load of the subsequent links is greatly reduced, the sedimentation tank without any chemical substance is adopted to physically filter the micro-polluted water body, and the generated sediment can be collected and recycled.
Wherein the micro-polluted water body mainly contains nutrient substances such as algae, organic suspended matters, COD, BOD, ammonia nitrogen, phosphorus and the like.
The sedimentation tank comprises a sedimentation area mainly used for removing large-particle suspended matters in the micro-polluted water body and a physical intercepting area used for removing film-hanging and filling materials of small-particle suspended matters in the micro-polluted water body; and a filler area is also arranged in the sedimentation tank, and a flocculating agent is filled in the filler area, so that the sedimentation effect is good.
2. Removing algae, suspended matters and BOD in the entering micro-polluted water by adopting a primary horizontal subsurface flow wetland, and enabling the micro-polluted water treated by the primary horizontal subsurface flow wetland to enter an aeration tank.
The primary horizontal subsurface flow wetland adopts a horizontal subsurface flow constructed wetland, the primary horizontal subsurface flow wetland has the main functions of removing algae, suspended matters in water, BOD and partial ammonia nitrogen, the removal rate of the algae and TSS is more than 95%, the removal rate of the BOD is 65-80%, and the intercepted suspended matters can be effectively collected through a bottom sludge discharge hopper and discharged out of a system together with sediments in a sedimentation tank for resource utilization. The hydraulic retention time of the primary subsurface flow wetland is generally 0.5-1 day, volcanic rock is added into the filler, so that the attachment area of biological bacteria is increased, heavy metal ions in water are adsorbed and removed, the pH value of the water body can be stabilized, and the activity of the water body can be increased.
The bottom of the first-stage subsurface flow wetland is provided with a plurality of sludge discharge hoppers, and a plurality of perforated aeration pipes are arranged in the sludge discharge hoppers so as to improve the dissolved oxygen of the water body, dredge the packing layer simultaneously, prevent the packing layer of the wetland from being blocked and prolong the service life of the wetland.
3. The dissolved oxygen concentration of the entering micro-polluted water body is improved by adopting the aeration oxygen increasing tank, and the micro-polluted water body after being enriched with oxygen in the aeration oxygen increasing tank enters the secondary vertical flow wetland.
The effluent of the first-level horizontal subsurface flow wetland is generally low in dissolved oxygen, the dissolved oxygen concentration needs to be increased to ensure that the subsequent second-level subsurface flow wetland is always kept in an aerobic state, and a nano oxygen increasing device is arranged in the aeration tank, so that the dissolved oxygen concentration of a water body can be quickly increased to reach a saturation value under the condition of low energy consumption, and the growth of nitrobacteria and the like is promoted.
4. And removing nutrient substances such as ammonia nitrogen, phosphorus, COD and the like in the entering micro-polluted water body by adopting a secondary vertical flow wetland, and enabling the micro-polluted water body treated by the secondary vertical flow wetland to enter a water collecting tank.
The secondary vertical flow wetland is mainly used for removing nutrient substances such as ammonia nitrogen, phosphorus, COD and the like in a water body, the filler in the secondary vertical flow wetland is made of pebbles, ceramsite, gravel, biomass phosphorus-absorbing filler and other materials, the top of the secondary vertical flow wetland is provided with a uniform water distribution mode of a water distribution groove and perforated pipes so as to ensure the uniformity of wetland inlet water, the bottom of the secondary vertical flow wetland is provided with a plurality of perforated water collecting pipes, and the perforated water collecting pipes are communicated with the perforated water collecting pipes through ventilation pipes so as to prevent dead zones from being generated in the wetland. The ammonia nitrogen removal rate of the secondary vertical flow wetland is 75-90%, the phosphorus removal rate is 60-75%, the COD removal rate is about 55%, and the hydraulic retention time is generally 1-1.5 days.
5. The water collecting tank collects the entering water flow to be directly recycled or stored in the source water tank to be used as a standby water source.
The innovation of the whole system lies in the reasonable selection and combination of different purification process technologies, and the pertinence and the practicability of taking micro-polluted water as a treatment object are strong; the whole system adopts physical and biological purification processes, no compound is added, the ecological characteristics are obvious, and the water body can be safely recycled.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that these are by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.
Claims (9)
1. A novel composite wetland system for repairing micro-polluted water is characterized by comprising a sedimentation tank, a primary horizontal subsurface flow wetland, an aeration tank, a secondary vertical flow wetland and a water collection tank;
the sedimentation tank is adopted to sediment the micro-polluted water body so as to remove most suspended matters in the micro-polluted water body, and the micro-polluted water body treated by the sedimentation tank enters the primary horizontal subsurface wetland;
removing algae, suspended matters, BOD and partial ammonia nitrogen in the entering micro-polluted water body by adopting the primary horizontal subsurface flow wetland, and enabling the micro-polluted water body treated by the primary horizontal subsurface flow wetland to enter an aeration tank;
the aeration and oxygenation pool is adopted to improve the dissolved oxygen concentration of the entering micro-polluted water body, and the micro-polluted water body after being enriched with oxygen in the aeration and oxygenation pool enters the secondary vertical flow wetland;
removing nutrient substances such as ammonia nitrogen, phosphorus, COD and the like in the entering micro-polluted water body by adopting the secondary vertical flow wetland, and enabling the micro-polluted water body treated by the secondary vertical flow wetland to enter a water collecting tank;
the water collecting tank collects the entering water flow to be directly recycled or stored in a source water tank to be used as a standby water source.
2. The novel complex wetland system for remediation of micro-polluted water as claimed in claim 1, wherein the sedimentation tank comprises a sedimentation zone for removing mainly large particle suspensions from the micro-polluted water and a physical cutoff zone for biofilm-suspended materials for removing small particle suspensions from the micro-polluted water.
3. The novel compound wetland system for restoring the micro-polluted water body as claimed in claim 2, wherein a filler area is arranged in the sedimentation tank.
4. The novel compound wetland system for restoring the micro-polluted water body as claimed in claim 1, wherein volcanic rocks are added into the filler of the primary horizontal subsurface wetland.
5. The novel combined wetland system for restoring the micro-polluted water body as claimed in claim 1, wherein a plurality of sludge discharge hoppers are arranged at the bottom of the primary horizontal subsurface wetland, and a plurality of perforated aeration pipes are arranged in the sludge discharge hoppers.
6. The novel composite wetland system for restoring the micro-polluted water body as claimed in claim 1, wherein a nano oxygen increasing device is arranged in the aeration and oxygen increasing pond to increase the dissolved oxygen concentration of the micro-polluted water body.
7. The novel composite wetland system for restoring the micro-polluted water body as claimed in claim 1, wherein the filler in the secondary vertical flow wetland is pebbles, ceramsite, gravel and biomass phosphorus-absorbing filler.
8. The novel combined wetland system for restoring the micro-polluted water body as claimed in claim 1, wherein the top of the secondary vertical flow wetland is provided with a uniform water distribution mode of a water distribution tank and a perforated pipe.
9. The novel combined wetland system for restoring the micro-polluted water body as claimed in claim 1, wherein a plurality of perforated water collecting pipes are arranged at the bottom of the secondary vertical flow wetland, and a vent pipe is arranged to be communicated with the perforated water collecting pipes.
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| CN201911231701.5A CN111056700A (en) | 2019-12-05 | 2019-12-05 | Novel composite wetland system for repairing micro-polluted water body |
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| CN201911231701.5A CN111056700A (en) | 2019-12-05 | 2019-12-05 | Novel composite wetland system for repairing micro-polluted water body |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111762959A (en) * | 2020-05-20 | 2020-10-13 | 中国科学院亚热带农业生态研究所 | System and method for purifying aquaculture wastewater |
| CN113800723A (en) * | 2021-10-19 | 2021-12-17 | 盐城师范学院 | Bionic wetland system |
| CN114031183A (en) * | 2021-10-27 | 2022-02-11 | 盐城师范学院 | Composite surface flow wetland system |
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| US20090255862A1 (en) * | 2008-03-27 | 2009-10-15 | Mark Harrison | Eco-treament system |
| WO2012161392A1 (en) * | 2011-05-24 | 2012-11-29 | 주식회사 성일엔텍 | Hybrid artificial wetland water purification system, sewage treatment device using same, and natural nonpoint purification device capable of simultaneously purifying river and lake water |
| CN105645677A (en) * | 2016-01-06 | 2016-06-08 | 南京柯若环境技术有限公司 | Horizontal flow/vertical flow integrated artificial wetland and operation method thereof |
| KR101815246B1 (en) * | 2017-06-05 | 2018-01-05 | 청호환경개발주식회사 | High efficiency composite wetland system |
| CN110204153A (en) * | 2019-07-12 | 2019-09-06 | 中都云谷信息科技有限公司 | A kind of Artificial Mangroves wet land system of deep level of processing sewage |
| CN110451723A (en) * | 2019-08-09 | 2019-11-15 | 四川大学 | A kind of mixed fillers fluidisation pond couples artificial swamp sewage water advanced treatment apparatus |
-
2019
- 2019-12-05 CN CN201911231701.5A patent/CN111056700A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20090255862A1 (en) * | 2008-03-27 | 2009-10-15 | Mark Harrison | Eco-treament system |
| WO2012161392A1 (en) * | 2011-05-24 | 2012-11-29 | 주식회사 성일엔텍 | Hybrid artificial wetland water purification system, sewage treatment device using same, and natural nonpoint purification device capable of simultaneously purifying river and lake water |
| CN105645677A (en) * | 2016-01-06 | 2016-06-08 | 南京柯若环境技术有限公司 | Horizontal flow/vertical flow integrated artificial wetland and operation method thereof |
| KR101815246B1 (en) * | 2017-06-05 | 2018-01-05 | 청호환경개발주식회사 | High efficiency composite wetland system |
| CN110204153A (en) * | 2019-07-12 | 2019-09-06 | 中都云谷信息科技有限公司 | A kind of Artificial Mangroves wet land system of deep level of processing sewage |
| CN110451723A (en) * | 2019-08-09 | 2019-11-15 | 四川大学 | A kind of mixed fillers fluidisation pond couples artificial swamp sewage water advanced treatment apparatus |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111762959A (en) * | 2020-05-20 | 2020-10-13 | 中国科学院亚热带农业生态研究所 | System and method for purifying aquaculture wastewater |
| CN113800723A (en) * | 2021-10-19 | 2021-12-17 | 盐城师范学院 | Bionic wetland system |
| CN114031183A (en) * | 2021-10-27 | 2022-02-11 | 盐城师范学院 | Composite surface flow wetland system |
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