CN111943434A - Micro-polluted drinking water source biological ecological restoration system and method - Google Patents

Micro-polluted drinking water source biological ecological restoration system and method Download PDF

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CN111943434A
CN111943434A CN202010803602.6A CN202010803602A CN111943434A CN 111943434 A CN111943434 A CN 111943434A CN 202010803602 A CN202010803602 A CN 202010803602A CN 111943434 A CN111943434 A CN 111943434A
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water
ecological
biological
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pipe
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胡志鑫
唐传祥
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Hunan Airbluer Environmental Protection Technology Co ltd
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Hunan Airbluer Environmental Protection Technology Co ltd
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • C02F2101/203Iron or iron compound
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/10Inorganic compounds
    • C02F2101/20Heavy metals or heavy metal compounds
    • C02F2101/22Chromium or chromium compounds, e.g. chromates
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2101/00Nature of the contaminant
    • C02F2101/30Organic compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/007Contaminated open waterways, rivers, lakes or ponds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2201/00Apparatus for treatment of water, waste water or sewage
    • C02F2201/009Apparatus with independent power supply, e.g. solar cells, windpower, fuel cells
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/08Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/10Solids, e.g. total solids [TS], total suspended solids [TSS] or volatile solids [VS]
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/11Turbidity
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/14NH3-N
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/15N03-N
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2303/00Specific treatment goals
    • C02F2303/16Regeneration of sorbents, filters
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/30Aerobic and anaerobic processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00Biological treatment of water, waste water, or sewage
    • C02F3/32Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae

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

Abstract

The invention provides a biological ecological restoration system and a biological ecological restoration method for a micro-polluted drinking water source, wherein the system comprises a micro-polluted water source, a water taking pump station, a regulating reservoir, a composite biological reaction subsystem, a sequencing batch type ecological artificial wetland subsystem and an ecological water storage pond which are sequentially communicated; the periphery of the micro-polluted water source is provided with a combined revetment and an ecological floating bed, and the ecological floating bed is close to the micro-polluted water source; the compound biological reaction subsystem is communicated with a fan. According to the micro-polluted drinking water source biological ecological restoration system and method, the life activities of plants and microorganisms are enhanced and cultivated by using natural matrixes or artificial matrixes, and organic pollutants, ammonia nitrogen, nitric acid nitrogen, iron, manganese, chromaticity and turbidity in a micro-polluted water source are intercepted, transferred, converted and degraded, so that the water quality of the micro-polluted drinking water source is purified. The system and the method have the advantages of being ecological, high in efficiency, easy to manage and protect, low in cost, low in energy consumption and free of pollution.

Description

Micro-polluted drinking water source biological ecological restoration system and method
Technical Field
The invention relates to the technical field of drinking water source restoration, in particular to a system and a method for restoring biological ecology of a micro-polluted drinking water source.
Background
At present, urban and rural drinking water source pollution caused by discharge of urban domestic sewage and urban industrial wastewater, agricultural non-point sources in rural areas, breeding wastewater and the like is increasingly serious, urban and rural water supply safety is directly threatened, and even a considerable part of rivers, lakes, reservoirs and underground water cannot meet the water quality requirement of a water supply source. In addition, the shortage of fresh water resources and the pollution of many fresh water drinking water sources to various degrees face serious challenges.
The problems of increase of soluble organic matters, higher ammonia nitrogen, peculiar smell of water, high chromaticity, algae propagation and the like generally exist in the polluted drinking water source. Aiming at the problem, most domestic water purification plants are used to adopt the traditional water purification process of coagulation, precipitation, filtration and chlorination, and the traditional water purification process is mainly suitable for removing solid impurities, colloid, viruses and the like in raw water of a drinking water source, but can not effectively remove organic matters and trihalomethanes in the raw water, and obviously is difficult to adapt to the requirement of removing organic matters harmful to human health from polluted raw water. Therefore, the traditional conventional water purification process cannot effectively reduce the pollutants in the water to a sanitary and safe level, and the drinking water quality of some water plants threatens the drinking safety of people.
Disclosure of Invention
The invention provides a micro-polluted drinking water source biological ecological restoration system and a micro-polluted drinking water source biological ecological restoration method, which aim to solve the problem that the traditional conventional water purification process cannot effectively reduce pollutants in water to a sanitary and safe level.
The invention provides a biological ecological restoration system for a micro-polluted drinking water source, which comprises a micro-polluted water source, a water taking pump station, a regulating pond, a composite biological reaction subsystem, a sequencing batch type ecological artificial wetland subsystem and an ecological water storage pond which are sequentially communicated; a combined revetment and an ecological floating bed are arranged at the periphery of the micro-polluted water source, and the ecological floating bed is close to the micro-polluted water source; the compound biological reaction subsystem is communicated with a fan.
Preferably, a regulating reservoir water inlet pipe is arranged on the side wall of the regulating reservoir, and the regulating reservoir water inlet pipe is communicated with the water taking pump station;
a water collecting pit is formed in the bottom of the regulating tank, a solar lift pump is arranged in the water collecting pit, a solar lift pump water conveying pipe is installed at the outlet of the solar lift pump, and the solar lift pump water conveying pipe is communicated to the composite biological reaction subsystem;
a plurality of adjusting tank partition plates are arranged inside the adjusting tank; the length of the adjusting tank partition plate is gradually reduced from the adjusting tank water inlet pipe to the direction of the water collecting pit.
Preferably, the composite biological reaction subsystem comprises an anoxic/aerobic biological reaction device, a biological filtering device and a biological adsorption device which are sequentially communicated from top to bottom; the fan is respectively communicated with the bottoms of the anoxic/aerobic biological reaction device, the biological filtering device and the biological adsorption device.
Preferably, the anoxic/aerobic biological reaction device comprises a reaction zone, a suspended combined filler arranged in the reaction zone, and a reaction zone water inlet pipe and a reaction zone water outlet pipe which are arranged on the side wall of the anoxic/aerobic biological reaction device;
the reaction zone is also provided with a reaction separation plate, and the bottom of the reaction separation plate is close to the bottom of the reaction zone; the first aeration pipe of the fan is positioned below the reaction zone, and the end part of the first aeration pipe is positioned at the reaction separation plate;
the upper part of the reaction zone is provided with a reaction zone water inlet channel and a reaction zone water outlet channel; the reaction zone water inlet pipe is respectively communicated with the regulating reservoir and the reaction zone water inlet channel, and the reaction zone water outlet pipe is respectively communicated with the reaction zone water outlet channel and the biological filtering device.
Preferably, a second aeration pipe, a filter plate and filter head assembly, a biological filtering support layer and a biological filtering material layer are arranged in the biological filtering device from bottom to top; the fan is communicated with the second aeration pipe;
a filtering water outlet channel, a back-flushing water drainage channel, a filtering water inlet pipe and a filtering water outlet pipe are arranged above the biological filtering material layer; a back-flushing drain pipe is arranged below the filter head assembly of the filter plate;
the filtering water outlet pipe is communicated with the biological adsorption device and the filtering water outlet channel respectively;
the filtering water inlet pipe is communicated with the anoxic/aerobic biological reaction device, and the backwashing water discharge pipe is communicated with the backwashing water discharge channel.
Preferably, a third aeration pipe and a carbon fiber bundle filler component are arranged inside the biological adsorption device from bottom to top;
a biological adsorption water inlet channel, a biological adsorption water outlet channel, a biological adsorption water inlet pipe and a biological adsorption water outlet pipe are arranged above the carbon fiber bundle filler component;
the biological adsorption water inlet pipe is respectively communicated with the biological filtering device and the biological adsorption water inlet channel;
and the biological adsorption water outlet pipe is respectively communicated with the biological adsorption water outlet channel and the sequencing batch type ecological artificial wetland subsystem.
Preferably, the sequencing batch type ecological artificial wetland subsystem comprises a water inlet well, an ecological artificial wetland and a water outlet well which are communicated with each other;
a water inlet well water inlet pipe is arranged at the upper part of the side wall of the water inlet well and is respectively communicated with the composite biological reaction subsystem and the water inlet well;
a water outlet well water outlet pipe is arranged at the lower part of the side wall of the water outlet well and is respectively communicated with the ecological water storage pond and the water outlet well;
an ecological water collecting layer, an ecological filler layer, an ecological water distribution layer and an ecological soil layer are sequentially arranged in the ecological artificial wetland from bottom to top;
a water collecting pipe is arranged in the ecological water collecting layer; one end of the water collecting pipe is closed, and the other end of the water collecting pipe is communicated with the water outlet well;
an oxygen pulling pipe is arranged in the ecological packing layer, a vertical oxygen pulling branch pipe is arranged on the oxygen pulling pipe, and the end part of the oxygen pulling branch pipe is exposed out of the ecological soil layer;
a water distribution pipe is arranged in the ecological water distribution layer, one end of the water distribution pipe is closed, and the other end of the water distribution pipe is communicated with the water inlet well;
and the ecological soil layer is planted with the hygrophytes.
Preferably, a water storage pond water inlet pipe and a water storage pond water outlet pipe are arranged on the side wall of the slope of the ecological water storage pond, the water storage pond water inlet pipe is communicated with the sequencing batch type ecological artificial wetland subsystem, and the water storage pond water outlet pipe is connected with a water purification plant;
a biological film structural layer is arranged at the bottom of the ecological water storage pond, and submerged plants are planted on the biological film structural layer; pond slope plants are also planted on the slope side wall of the ecological water storage pond.
Preferably, the combined revetment comprises a protective belt, an ecological water tank, a natural slope prevention belt and a green belt which are sequentially arranged from the micro-polluted water source to the water taking pump station; wherein the protective band and the natural slope prevention band are in a slope form.
The invention provides a biological ecological restoration method for a micro-polluted drinking water source, which comprises the following steps:
after being treated by an ecological floating bed and a combined revetment, a micro-polluted water source is discharged into a regulating reservoir through a water taking pump station so as to regulate the water quantity of the regulating reservoir;
discharging the micro-polluted water with the water quantity regulated by the regulating reservoir into a composite biological reaction subsystem so as to degrade or remove organic matters, ammonia nitrogen and nitrite nitrogen in the micro-polluted water by the composite biological reaction subsystem;
discharging the micro-polluted water treated by the composite biological reaction subsystem into a sequencing batch ecological artificial wetland subsystem so as to enable the sequencing batch ecological artificial wetland subsystem to carry out flooding adsorption and water discharging reoxygenation sequencing batch treatment;
and discharging the micro-polluted water treated by the sequencing batch type ecological artificial wetland subsystem into an ecological water storage pond so as to discharge the water into a water purification plant after stabilizing the water quality.
The technical scheme provided by the embodiment of the invention can have the following beneficial effects:
the invention provides a biological ecological restoration system and method for a micro-polluted drinking water sourceA system and an ecological water storage pond; a combined revetment and an ecological floating bed are arranged at the periphery of the micro-polluted water source, and the ecological floating bed is close to the micro-polluted water source; the compound biological reaction subsystem is communicated with a fan. In the system and the method for biologically and ecologically restoring the micro-polluted drinking water source, the natural matrix or the artificial matrix is utilized to strengthen the life activities of cultivating plants and microorganisms, and organic pollutants (COD) and ammonia Nitrogen (NH) in the micro-polluted water source3-N), nitric acid Nitrogen (NO)2-N), iron, manganese, chromaticity and turbidity to be intercepted, transferred, converted and degraded, thereby purifying the quality of the slightly polluted drinking water source. The system and the method have the advantages of being ecological, high in efficiency, easy to manage and protect, low in cost, low in energy consumption and free of pollution.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention, as claimed.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
Fig. 1 is a schematic overall structure diagram of a biological ecological restoration system for a micro-polluted drinking water source provided by an embodiment of the invention;
fig. 2 is a schematic structural diagram of a combined revetment according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a conditioning tank according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a composite biological reaction subsystem provided in an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a sequencing batch type ecological constructed wetland subsystem provided by the embodiment of the invention;
fig. 6 is a schematic structural view of an ecological water storage pond provided in an embodiment of the present invention;
the symbols represent:
1-a micro-polluted water source, 2-a water taking pump station, 3-a regulating pond, 4-a composite biological reaction subsystem, 5-a sequencing batch type ecological artificial wetland subsystem, 6-an ecological water storage pond, 7-a combined bank protection, 8-an ecological floating bed and 9-a fan;
301-adjusting pool water inlet pipe, 302-water collecting pit, 303-solar lift pump, 304-solar lift pump water inlet pipe, 305-adjusting pool clapboard;
401-anoxic/aerobic biological reaction device, 402-biofiltration device, 403-biosorption device;
4011-reaction zone, 4012-suspended combined filler, 4013-reaction zone water inlet pipe, 4014-reaction zone water outlet pipe, 4015-reaction separation plate, 4016-reaction zone water inlet channel and 4017-reaction zone water outlet channel;
4021-a filter plate and filter head assembly, 4022-a biological filtration supporting layer, 4023-a biological filtration material layer, 4024-a filtration water outlet channel, 4025-a back flush water discharge channel, 4026-a filtration water inlet pipe, 4027-a filtration water outlet pipe and 4028-a back flush water discharge pipe;
4031-carbon fiber bundle packing component, 4032-biosorption water inlet channel, 4033-biosorption water outlet channel, 4034-biosorption water inlet pipe, 4035-biosorption water outlet pipe;
501-a water inlet well, 502-an ecological artificial wetland, 503-a water outlet well, 504-a water inlet well water inlet pipe and 505-a water outlet well water outlet pipe;
5021-an ecological water collecting layer, 5022-an ecological filler layer, 5023-an ecological water distribution layer, 5024-an ecological soil layer, 5025-a water collecting pipe, 5026-an oxygen extraction pipe, 5027-an oxygen extraction branch pipe, 5028-a water distribution pipe and 5029-planting of hygrophytes;
601-a water storage pond water inlet pipe, 602-a water storage pond water outlet pipe, 603-a biomembrane structural layer, 604-submerged plants and 605-pond slope plants;
701-a protective zone, 702-an ecological water tank, 703-a natural slope prevention zone and 704-a green belt;
901-a first aeration pipe, 902-a second aeration pipe, 903-a third aeration pipe.
Detailed Description
Referring to fig. 1, fig. 1 shows a schematic structural diagram of a biological ecological restoration system for a micro-polluted drinking water source provided by an embodiment of the present application. As can be seen from the attached drawing 1, the biological and ecological restoration system for the micro-polluted drinking water source provided by the embodiment of the application comprises a micro-polluted water source 1, a water taking pump station 2, a regulating reservoir 3, a composite biological reaction subsystem 4, a sequencing batch type ecological artificial wetland subsystem 5 and an ecological water storage pond 6 which are sequentially communicated, wherein the composite biological reaction subsystem 4 is communicated with a fan 9.
Specifically, the combined revetment 7 and the ecological floating bed 8 are arranged at the periphery of the micro-polluted water source 1, and the ecological floating bed 8 is close to the micro-polluted water source 1. In the embodiment of the application, the carrier of the ecological floating bed 8 is a polystyrene foam board, and the matrix is coconut fiber. The polystyrene foam board is round in appearance, the radius of a single polystyrene foam board is 500mm, and the polystyrene foam board is assembled into a quincunx shape to surround the periphery of the micro-polluted water source 1. The water hyacinth is planted on the coconut fiber, and the carbon fiber ecological grass which is 1000mm long and can swing freely is hung at the lower part of the floating bed. In order to stabilize the ecological floating bed 8, the ecological floating bed 8 is fixed by adopting a rod type.
Because the eichhornia crassipes is planted on the ecological floating bed 8, and the carbon fiber ecological grass which is 1000mm long and can swing freely is hung at the lower part of the ecological floating bed, the roots, stems and leaves of the eichhornia crassipes and the carbon fiber ecological grass can adsorb and hydrolyze micropollutants in water, and simultaneously promote the growth of microorganisms in the water, so that a complete biological chain with producers, consumers and decomposers is formed, and the aim of naturally purifying the water quality is fulfilled. In addition, the ecological floating bed 8 has good removal and purification effects on trace oils, organic pollutants (COD), nitrogen and phosphorus (N, P), pesticide residues, salts and heavy metal ions, can effectively control the micro-pollution condition of the micro-polluted water source 1, and plays roles of protection and pre-purification on the micro-polluted water source 1.
Referring to fig. 2, fig. 2 shows a schematic structural diagram of a combined revetment provided in an embodiment of the present application. As shown in fig. 2, the combined revetment 7 comprises a protective zone 701, an ecological water tank 702, a natural slope prevention zone 703 and a green zone 704 which are sequentially arranged from the micro-polluted water source 1 to the water intake pump station 2, wherein the protective zone 701 and the natural slope prevention zone 703 are in a slope form. Specifically, the protective belt 701 is a small riprap levee which is beneficial to living beings to inhabit, and the structural top elevation is usually about 300mm of the normal water level. Aquatic plants can be planted on the riprap levee of the protective belt 701 and used for inhabiting organisms. The ecological water tank 702 is of a tank structure, and emergent aquatic plants, floating plants, hygrophytes and the like such as cattail, water lily, floral giant reed and the like are planted in the tank and used for providing a space for living beings to inhabit, lay eggs and propagate. More preferably, the width of the ecological water tank 702 is 2000mm, the depth of the ecological water tank is 1000mm, and the depth of water in the ecological water tank is 600 mm. The natural slope prevention belt 703 is in a slope form, and flower plants such as canna, pink reineckea herb and the like can be planted on the slope to form a natural bank slope with a certain protection effect, so that a slope transition environment from a water area to a land area is created, and the requirement of natural connection of ecological environments of water and land is met. More preferably, the width of the natural slope prevention belt 703 is 2000 mm. Greenbelt 704 is a land plant, and functions as an ecological barrier, which can intercept N, P, organic matter (COD), and pesticide residues leaked from the land. More preferably, the green belt 704 is planted with poplar and willow trees, and the width of the poplar and willow trees is 2500 mm.
The combined revetment 7 in the embodiment of the application enlarges the growth area of water surface and green land organisms, and achieves the purposes of fixing river bank side slopes and keeping water and soil by using plant root systems; in addition, the metabolic activity of plants planted on the shore and on the water surface and rhizosphere indigenous microorganisms thereof is utilized to filter, absorb, degrade and convert organic pollutants and nutritive salts flowing into the water source area by surface runoff.
Referring to fig. 3, fig. 3 is a schematic structural diagram of a conditioning tank provided in an embodiment of the present application. As can be seen from fig. 3, the adjusting tank 3 provided in the embodiment of the present application is a sinking structure, and a water inlet pipe 301 of the adjusting tank is disposed on a side wall of the adjusting tank, and the water inlet pipe 301 of the adjusting tank is communicated with the water intake pump station 2, so as to draw the micro-polluted water in the micro-polluted water source 1 through the water intake pump station 2. The bottom of equalizing basin 3 is equipped with sump 302, is equipped with solar energy elevator pump 303 in this sump 302, and the exit installation solar energy elevator pump delivery pipe 304 of solar energy elevator pump 303. The solar lift pump water delivery pipe 304 is communicated with the composite biological reaction subsystem 4. A plurality of adjusting tank partition plates 305 are arranged in the adjusting tank 3, and the length of the adjusting tank partition plates 305 is gradually reduced from the adjusting tank water inlet pipe 301 to the water collecting pit 302. The arrangement of a plurality of regulating reservoir partition plates 305 in the embodiment of the application can prolong the retention time of water, change the flow rate of the water, improve the activity of the water and further achieve the effects of regulating the water quantity and uniformly regulating the water quality. The water conditioned by the conditioning tank partition 305 is discharged into the composite biological reaction subsystem 4 through the solar lift pump 303 and the solar lift pump water outlet pipe 304 in the water collecting pit 302. In addition, the top of equalizing basin 3 is equipped with the access hole to overhaul the inside equipment of equalizing basin 3 through the access hole.
Referring to fig. 4, fig. 4 is a schematic structural diagram of a composite biological reaction subsystem provided in an embodiment of the present application. As shown in fig. 4, the composite biological reaction subsystem 4 provided in the embodiment of the present application includes an anoxic/aerobic biological reaction device 401, a biological filtration device 402, and a biological adsorption device 403, which are sequentially connected from top to bottom, wherein the anoxic/aerobic biological reaction device 401, the biological filtration device 402, and the biological adsorption device 403 are respectively connected to the blower 9. The composite biological reaction subsystem 4 in the embodiment of the application is of a tower-shaped structure, and the outside is made of a steel plate. The anoxic/aerobic biological reaction device 401, the biological filtering device 402 and the biological adsorption device 403 are connected through the wafer type flange, so that the device is convenient to disassemble, and is convenient to replace fillers and overhaul.
Specifically, the anoxic/aerobic biological reaction apparatus 401 includes a reaction zone 4011, a reaction separation plate 4015 is further disposed on the reaction zone 4011, and the bottom of the reaction separation plate 4015 is close to the bottom of the reaction zone 4011. Specifically, a reaction separation plate 4015 is disposed at a quarter of the volume of the reaction zone 4011, so that the reaction zone 4011 is divided into an anoxic reaction zone and an aerobic reaction zone, and the anoxic reaction zone is communicated with the aerobic reaction zone. The first aeration pipe 901 of the blower 9 is located below the aerobic reaction zone, and the end is located at the reaction partition 4015. The first aeration pipe 901 can provide dissolved oxygen required by the reaction for aerobic organisms in the aerobic reaction zone, and DO is less than or equal to 2 mg/L.
The interior of the reaction zone 4011 is provided with a suspended combined filler 4012, and the suspended combined filler 4012 is not only beneficial to the growth of nitrobacteria with long growth cycle, but also can ensure that the biological reaction zone keeps higher microorganism concentration, and has abundant biological phase and good treatment effect. More preferably, the diameter of the plastic ring sheets of the packing in the suspended combined packing 4012 is 75mm, the diameter of single packing sheets is 150mm, the distance between the single packing sheets is 60mm, the arrangement distance is 100mm, and the arrangement height of the packing is 800 mm. The distance between the first aeration pipe 901 and the biological filter device 402 is 200 mm.
In addition, a reaction zone water inlet pipe 4013 and a reaction zone water outlet pipe 4014 are arranged on the side wall of the anoxic/aerobic biological reaction device 401, a reaction zone water inlet channel 4016 and a reaction zone water outlet channel 4017 are arranged on the upper portion of the reaction zone 4011, the reaction zone water inlet pipe 4013 is communicated with the regulating reservoir 3 and the reaction zone water inlet channel 4016 respectively, and the reaction zone water outlet pipe 4014 is communicated with the reaction zone water outlet channel 4017 and the biological filter device 402 respectively.
The water adjusted by the adjusting tank partition 305 is discharged into the anoxic/aerobic biological reaction device 401 in the composite biological reaction subsystem 4 through the solar lift pump 303, the solar lift pump water inlet pipe 304 and the reaction zone water inlet pipe 4013 in the water collecting pit 302, and enters the reaction zone water inlet channel 4016. Water flow enters an anoxic reaction zone in the reaction zone 4011 after filling the water channel in the reaction zone water inlet channel 4016, and then is mixed with the reflux nitrification liquid in the aerobic reaction zone to complete the microbial denitrification reaction, and NO is addedxConversion of-N to-N2And N2O, and further N2Escaping the water surface. Then the micro-polluted water enters an aerobic reaction zone with sufficient oxygen supply for continuous aeration, wherein part of organic matters and ammonia nitrogen are degraded in the aerobic reaction zone. The return flow of the nitrified liquid in the anoxic/aerobic biological reaction device 401 utilizes the driving force of the aeration of the first aeration pipe 901, does not need power and saves power consumption. The suspended combined filler 4012 arranged in the reaction zone 4011 can be beneficial to the growth of nitrobacteria with long growth cycle, and can ensure that the biological reaction zone keeps higher microorganism concentration, and has rich biological phase and good treatment effect. The unique structure of the anoxic/aerobic biological reaction device 401 makes the nitrification and denitrification reactions dominant in different reaction zones in the reaction zone 4011, and simultaneously because of the existence of the anoxic environment inside the combined filler biofilm in the suspended combined filler 4012, the nitrification and denitrification, the short-range nitrification and denitrification reactions all occur in different tanks at the same time, so that organic matters, ammonia nitrogen, nitrite nitrogen and the like can be efficiently degraded or removed. The micro-polluted water treated by the anoxic/aerobic biological reaction device 401 passes through the reactionZone outlet channel 4017 and reaction zone outlet tube 4014 enter biofiltration unit 402.
As shown in fig. 4, the interior of the biological filter device 402 is provided with a second aeration pipe 902, a filter plate and filter head assembly 4021, a biological filter supporting layer 4022 and a biological filter material layer 4023 from bottom to top, wherein the fan 9 is communicated with the second aeration pipe 902. A filtering water channel 4024, a back flushing water drainage channel 4025, a filtering water inlet pipe 4026 and a filtering water outlet pipe 4027 are arranged above the biological filtering material layer 4023, and a back flushing water drainage pipe 4028 is arranged below the filtering head assembly 4021 of the filtering plate. Wherein, the filtered water pipe 4027 is respectively communicated with the biological adsorption device 403 and the filtered water channel 4024, the filtered water pipe 4026 is communicated with the anoxic/aerobic biological reaction device 401, and the backwashing water drain pipe 4028 is communicated with the backwashing water drain channel 4025.
Specifically, the filter water inlet pipe 4026 is communicated with a reaction zone water outlet pipe 4014 in the anoxic/aerobic biological reaction device 401, and the micro-polluted water treated by the anoxic/aerobic biological reaction device 401 enters the biological filter device 402 through the filter water inlet pipe 4026 and then enters the lower part of the second aeration pipe 902, and then the micro-polluted water is sprayed into the biological filter supporting layer 4022 and the biological filter material layer 4023 through the filter plate and filter head assembly 4021 to perform reverse-particle size biological filtration. Meanwhile, the second aeration pipe 902 provides the dissolved oxygen needed by the biological filtration, and DO is less than or equal to 4 mg/L. Because the filter material in the biological filter material layer 4023 has a large specific surface area, a biological membrane can be formed on the surface of the filter material by a fixed growth technology. In the process that the micro-polluted water flows from the bottom to the top of the biological filter device 402, the micro-polluted water is continuously contacted with the biological membrane, so that organic matters, ammonia, nitrogen and phosphorus in the micro-polluted water are absorbed and filtered by the biological membrane, and the purposes of degradation and removal are achieved. In addition, the filter material in the biological filter material layer 4023 can also effectively remove suspended substances SS, iron, manganese and the like. After the micro-polluted water is contacted with the biological membrane for 12-24 hours, the biological filtration filter material layer 4023 needs to be subjected to back washing, and the back-washed drainage water is discharged into the regulating tank 3 through a back-washing drainage pipe 4028 and a back-washing drainage channel 4025. The water treated by the biological filter 402 is discharged into the biological adsorption device 403 through the filtering water channel 4024 and the reaction zone water outlet pipe 4014.
More preferably, the second aeration pipe 902 in the embodiment of the present application is a non-square pipe, and the diameter of the main pipe is 75mm, and the diameter of the branch pipe is 32 mm. The lower side of the vertical line of the branch pipeline is provided with two rows of staggered holes, the angle of the two rows of holes is 45 degrees, the aperture of each hole is 5mm, and the hole interval is 60 mm. The filter plates in the filter plate and filter head assembly 4021 are made of stainless steel plates with the thickness of 8mm, round holes with the diameter of 33mm are drilled in the stainless steel plates, and the distance between the round holes is 100 mm. The circular hole drilled on the filter plate is internally provided with a bidirectional filter head, and the specification of the bidirectional filter head is phi multiplied by H =80 multiplied by 140 mm. The material of the support layer of the biological filtration support layer 4022 is quartz sand, the particle size of the quartz sand is 2-4mm, and the laying thickness of the quartz sand is 200 mm. The filtering material of the biological filtering material layer 4023 is a porous concave-convex modified ceramsite filtering material, the particle size of the filtering material is 12-24mm, and the laying thickness of the porous concave-convex modified ceramsite filtering material is 700 mm.
As shown in fig. 4, a third aeration pipe 903 and a carbon fiber bundle packing assembly 4031 are arranged inside the biological adsorption device 403 from bottom to top. A biological adsorption water inlet channel 4032, a biological adsorption water outlet channel 4033, a biological adsorption water inlet pipe 4034 and a biological adsorption water outlet pipe 4035 are arranged above the carbon fiber bundle packing assembly 4031, wherein the biological adsorption water inlet pipe 4034 is respectively communicated with the biological filtering device 402 and the biological adsorption water inlet channel 4032, and the biological adsorption water outlet pipe 4035 is respectively communicated with the biological adsorption water outlet channel 4033 and the sequencing batch type ecological artificial wetland subsystem 5.
Specifically, the biological adsorption water inlet pipe 4034 is communicated with the filtering water outlet pipe 4027 in the biological filtering device 402, and the micro-polluted water treated by the biological filtering device 402 enters the biological adsorption device 403 through the biological adsorption water inlet pipe 4034 and then enters the biological adsorption water inlet channel 4032. The micro-polluted water falls onto the carbon fiber bundle packing assembly 4031 through the biological adsorption water inlet channel 4032, and then the carbon fiber bundle packing assembly 4031 is subjected to biological adsorption treatment. Meanwhile, the third aeration pipe 903 provides the dissolved oxygen required for biological adsorption, and DO is less than or equal to 1 mg/L.
The specific surface area of the carbon fiber bundle packing assembly 4031 is 1000m2The concentration is 16-20 times of that of other carriers. The carbon fiber bundle packing assembly 4031 has a large specific surface area and a large number of micropores, has an adsorption entrapment effect, and is packedThe surface of the material beam can form a layer of biological film which can complete the function of removing micro-pollution through biodegradation. In the present embodiment, the microorganisms on the biofilm formed by carbon fiber bundle packing element 4031 are mainly aerobic oligotrophic microorganisms such as Aureobasidium (Caulobacter), Hyphomicrobium (Hyphomicrobium), Achromobacter (Achromobacter), Vibrio (Vibrio), Spirobacter (Spirillum), Pseudomonas (Pseudomonas) and Acinetobacter (Acinetobacter). The aerobic oligotrophic microbe features that it can utilize various compounds to produce transferase with high activity and affinity to metabolite, high specific surface area, low respiration rate and fast growth and propagation in environment with very low concentration of micro-polluted organic matter. Therefore, in the process of contacting the micro-polluted water with the carbon fiber bundle packing assembly 4031, organic matters, ammonia nitrogen, iron, manganese and chromaticity in the micro-polluted water are gradually oxidized and converted through the metabolism activity of microorganisms and the comprehensive actions of biological flocculation, adsorption and the like, so that the aim of strengthening and purifying the water quality is fulfilled. The water treated by the biological adsorption device 403 is discharged into the sequencing batch type ecological artificial wetland subsystem 5 through the biological adsorption water outlet channel 4033 and the biological adsorption water outlet pipe 4035.
More preferably, in the embodiment of the present application, the carbon fiber bundle packing of the carbon fiber bundle packing assembly 4031 is 8200 carbon fiber bundles per bundle, the spacing between the carbon fiber bundles is 60mm, and the arrangement height is 600 mm. Further, the fan 9 in this embodiment of the application is a solar fan, and the solar fan is respectively communicated with the first aeration pipe 901, the second aeration pipe 902 and the third aeration pipe 903.
The Ames test (full name: contaminant mutagenicity detection) shows that: after the highly mutation-causing and positive micro-polluted raw water is treated by the anoxic/aerobic biological reaction device 401 and the biological filtration device 402, the effluent discharged from the water outlet pipe 4014 of the reaction area is weakened to be positive, and after the treatment by the biological adsorption device 403, the effluent discharged from the water outlet pipe 4035 of the biological adsorption is negative. Therefore, the composite biological reaction subsystem 4 provided by the embodiment of the application can effectively treat micro-polluted water, and the purpose of purifying water quality is achieved.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a sequencing batch type ecological constructed wetland subsystem 5 provided in the embodiment of the present application. As shown in fig. 5, the sequencing batch type ecological artificial wetland subsystem 5 provided by the embodiment of the application comprises a water inlet well 501, an ecological artificial wetland 502 and a water outlet well 503 which are communicated with each other, and realizes the sequence batch operation of waterflooding adsorption and drainage reoxygenation by adopting a slow-forward and fast-drainage mode.
Specifically, a water inlet well inlet pipe 504 is arranged on the upper portion of the side wall of the water inlet well 501, and the water inlet well inlet pipe 504 is respectively communicated with the biological adsorption water outlet pipe 4035 in the composite biological reaction subsystem 4 and the water inlet well 501. Therefore, the micro-polluted water treated by the composite biological reaction subsystem 4 enters the water inlet well 501 through the biological adsorption water outlet pipe 4035 and the water inlet well 504, and then enters the ecological artificial wetland 502, and the micro-polluted water treated by the composite biological reaction subsystem 4 is treated again by the ecological artificial wetland 502. A water outlet well water outlet pipe 505 is arranged at the lower part of the side wall of the water outlet well 503, and the water outlet well water outlet pipe 505 is respectively communicated with the ecological water storage pond 6 and the water outlet well 503, so that the micro-polluted water treated by the ecological artificial wetland 502 is discharged into the ecological water storage pond 6 through the water outlet well 503 and the water outlet well water outlet pipe 505.
In the embodiment of the application, an ecological water collecting layer 5021, an ecological filler layer 5022, an ecological water distribution layer 5023 and an ecological soil layer 5024 are sequentially arranged in the ecological artificial wetland 502 from bottom to top. Through the physical, chemical and biological actions of the ecological water collection layer 5021, the ecological filler layer 5022, the ecological water distribution layer 5023 and the ecological soil layer 5024, which are coordinated with each other, the filler adsorption, ion exchange, coprecipitation, efficient microorganism adsorption reduction, fixation and biological extraction are combined, so that the deep purification of organic matters, ammonia nitrogen, nitrite nitrogen, iron, manganese and chromaticity is realized.
Specifically, the lowest part of the ecological artificial wetland 502 is a foundation layer of the ecological artificial wetland 502, which is a C15 plain concrete foundation and has a thickness of 200 mm. A water distribution pipe 5028 is arranged in the ecological water distribution layer 5023, one end of the water distribution pipe 5028 is closed, and the other end of the water distribution pipe 5028 is communicated with the water inlet well 501, so that water in the water inlet well 501 enters the ecological artificial wetland 502 through the water inlet well 504 and the water distribution pipe 5028. The ecological water distribution layer 5023 in the embodiment of the application is paved by cobblestones with the particle size of 16-32mm, and the paving thickness is 300 mm. Water distribution pipe 5028 is non-style of calligraphy structure, and its pipe diameter of being responsible for is DN100mm, and the branch pipe diameter is DN50mm, and branch pipe perpendicular line downside becomes two rows of staggered arrangement trompils, and two rows of punchhole angles are 60, and the aperture is 6mm, and the hole interval is 250 mm.
The water flow entering the ecological water distribution layer 5023 flows downwards under the action of gravity and further reaches the ecological filler layer 5022. The filler in the ecological filler layer 5022 in the embodiment of the application is prepared by mixing quartz sand, bamboo charcoal and zeolite according to a mass ratio of 1:1:1 to form a mixed filler with a particle size of 8-16mm, and the thickness of the filler layer is 600 mm. In addition, an oxygen extraction pipe 5026 is arranged in the ecological filler layer 5022, a vertical oxygen extraction branch pipe 5027 is arranged on the oxygen extraction pipe 5026, and the end of the oxygen extraction branch pipe 5027 is exposed out of the ecological soil layer 5024. The upper part of the oxygen pulling pipe 5026 is provided with a hole, the lower part of the oxygen pulling branch pipe 5027 is also provided with a hole, the hole diameter of the hole is 10mm, and the hole distance is 300 mm.
The micro-polluted water filtered by the ecological filler layer 5022 enters the ecological water collecting layer 5021. A water collecting pipe 5025 is arranged in the ecological water collecting layer 5021, one end of the water collecting pipe 5025 is closed, and the other end is communicated with the water outlet well 503. Therefore, the water treated by the ecological artificial wetland 502 is discharged through the water collecting pipe 5025. More preferably, the ecological water collecting layer 5021 is formed by paving gravels with the particle size of 16-32mm, and the paving thickness is 300 mm. Collector pipe 5025 is non-style of calligraphy structure, and its pipe diameter of being responsible for is DN150mm, and the branch pipe diameter is DN75mm, and branch pipe perpendicular line downside becomes two rows of staggered arrangement trompils, and two rows of eyelet angles are 60, and the aperture is 8mm, and the hole interval is 200 mm. In addition, an ecological soil layer 5024 is arranged at the upper part of the ecological water distribution layer 5023, a hygrophyte 5029 is planted on the ecological soil layer 5024, and the hygrophyte 5029 is preferably cress.
The sequence batch type ecological artificial wetland subsystem 5 has the flooding adsorption process that: the water is uniformly distributed through the water distribution pipe 5028, so that the water uniformly passes through the ecological packing layer 5022, and the water level gradually rises to be higher than the ecological soil layer 5024. In the process of gradually rising water level, water of the water source is fully contacted with the ecological filler layer 5022 and microorganisms, and the ecological filler layer 5022 can deeply purify the water through the synergistic effect of physics, chemistry and biology.
The sequence batch type ecological constructed wetland subsystem 5 comprises the following steps: after the flooding time reaches the set time, the water collecting pipe 5025 is opened, the ecological artificial wetland 502 drains water instantly, and the water level in the wetland drops rapidly. When the water level in the wetland is rapidly reduced, the wetland enters an evacuation and reoxygenation stage, and oxygen in the atmosphere rapidly enters the wetland through gaps among the oxygen extraction pipes 5026, the oxygen extraction branch pipes 5027 and the ecological filler layer 5022 for microorganisms in the wetland to utilize. After the evacuation and reoxygenation are finished, the wetland enters water from the water inlet well 501 again, and the next period is started. Generally, the running period of the sequence batch of flooding adsorption and water drainage reoxygenation of the sequence batch type ecological artificial wetland subsystem 5 is 24 hours.
In the embodiment of the application, ammonia Nitrogen (NH) in the slightly polluted water is treated by the sequencing batch type ecological artificial wetland subsystem 53-N) removal rate of 80-90%, organic matter (COD) removal rate of 35-50%, nitric acid Nitrogen (NO)2-N) removal rate of 80-90%, removal rate of iron of 80%, removal rate of manganese of 65%, removal rate of chromaticity of 30-40%, and removal rate of turbidity of 70-85%.
Referring to fig. 6, fig. 6 shows a schematic structural diagram of an ecological water storage pond 6 provided by the embodiment of the present application. As can be seen from fig. 6, a water storage pond water inlet pipe 601 and a water storage pond water outlet pipe 602 are arranged on the side wall of the slope of the ecological water storage pond 6 provided by the embodiment of the application, the water storage pond water inlet pipe 601 is communicated with the sequencing batch type ecological artificial wetland subsystem 5, and the water storage pond water outlet pipe 602 is connected with a water purification plant. Therefore, the micro-polluted water treated by the sequencing batch type ecological constructed wetland subsystem 5 enters the ecological water storage pond 6 through the water inlet pipe 601 of the water storage pond, and the water treated by the ecological water storage pond 6 is discharged into a water purification plant through the water outlet pipe 602 of the water storage pond for conventional water purification treatment.
The bottom of the ecological water storage pond 6 is provided with a biomembrane structural layer 603, and the biomembrane structural layer 603 is paved by yellow sand with the grain diameter of 0.6-1.2 mm. Submerged plants 604 such as watermifoil are planted on the biomembrane structural layer 603. Pond slope plants 605, such as cyperus esculentus and the like, are also planted on the side wall of the slope of the ecological water storage pond 6. The biomembrane structural layer 603 and the planted submerged plants 604 can stabilize the quality of the effluent water; the pond slope plant 605 can effectively intercept the land pollutants, and the purpose of prevention, control and protection is achieved.
Based on the micro-polluted drinking water source biological ecological restoration system provided by the embodiment of the application, the embodiment of the application also provides a micro-polluted drinking water source biological ecological restoration method, and the method comprises the following steps:
s01: after being treated by the ecological floating bed and the combined revetment, the micro-polluted water source is discharged into the regulating reservoir through the water taking pump station so as to regulate the water quantity in the regulating reservoir.
The surrounding ecological floating bed 8 of the micro-polluted water source 1 can adsorb and hydrolyze micro-pollutants in water, promote the growth of microorganisms in the water, form a complete biological chain with producers, consumers and decomposers, and achieve the purpose of naturally purifying the water. In addition, the ecological floating bed 8 has good removal and purification effects on trace oils, organic pollutants (COD), nitrogen and phosphorus (N, P), pesticide residues, salts and heavy metal ions, can effectively control the micro-pollution condition of the micro-polluted water source 1, and plays roles of protection and pre-purification on the micro-polluted water source 1.
The combined revetment 7 is a bank of the micro-polluted water source 1, can expand the growth area of water surface and green land organisms, and achieves the purposes of fixing river bank side slopes and keeping water and soil by using plant root systems; in addition, the metabolic activity of plants planted on the shore and on the water surface and rhizosphere indigenous microorganisms thereof is utilized to filter, absorb, degrade and convert organic pollutants and nutritive salts flowing into the water source area by surface runoff.
After the initial protection of the ecological floating bed 8 and the combined revetment 7, the micro-polluted water in the micro-polluted water source 1 is pumped into the regulating reservoir 3 through the water intake pump station 2 so as to regulate the water quantity and the uniform water quality of the micro-polluted water.
S02: and discharging the micro-polluted water with the water quantity regulated by the regulating reservoir into a composite biological reaction subsystem so as to degrade or remove organic matters, ammonia nitrogen and nitrite nitrogen in the micro-polluted water by the composite biological reaction subsystem.
The micro-polluted water with the water quantity and the water quality regulated by the regulating reservoir 3 is discharged into the composite biological reaction subsystem 4 through the solar lift pump 303 and the solar lift pump water outlet pipe 304 in the water collecting pit 302, so that the micro-polluted water is treated through the anoxic/aerobic biological reaction device 401, the biological filtering device 402 and the biological adsorption device 403.
In the anoxic/aerobic biological reaction device 401, water flow enters the anoxic reaction zone in the reaction zone 4011 after the water inlet channel 4016 of the reaction zone is fully drained, and then is mixed with the reflux nitrifying liquid in the aerobic reaction zone to complete the microbial denitrification reaction, and NO is addedxConversion of-N to-N2And N2O, and further N2Escaping the water surface. Then the micro-polluted water enters an aerobic reaction zone with sufficient oxygen supply for continuous aeration, wherein part of organic matters and ammonia nitrogen are degraded in the aerobic reaction zone. The return flow of the nitrified liquid in the anoxic/aerobic biological reaction device 401 utilizes the driving force of the aeration of the first aeration pipe 901, does not need power and saves power consumption. The suspended combined filler 4012 arranged in the reaction zone 4011 can be beneficial to the growth of nitrobacteria with long growth cycle, and can ensure that the biological reaction zone keeps higher microorganism concentration, and has rich biological phase and good treatment effect. The unique structure of the anoxic/aerobic biological reaction device 401 makes the nitrification and denitrification reactions dominant in different reaction zones in the reaction zone 4011, and simultaneously because of the existence of the anoxic environment inside the combined filler biofilm in the suspended combined filler 4012, the nitrification and denitrification, the short-range nitrification and denitrification reactions all occur in different tanks at the same time, so that organic matters, ammonia nitrogen, nitrite nitrogen and the like can be efficiently degraded or removed. The micro-polluted water treated by the anoxic/aerobic biological reaction device 401 enters the biological filter device 402 through the reaction zone water outlet channel 4017 and the reaction zone water outlet pipe 4014.
In the biofiltration device 402, since the filter material in the biofiltration filter material layer 4023 has a large specific surface area, a biofilm can be formed on the surface of the filter material by a fixed growth technique. In the process that the micro-polluted water flows from the bottom to the top of the biological filter device 402, the micro-polluted water is continuously contacted with the biological membrane, so that organic matters, ammonia, nitrogen and phosphorus in the micro-polluted water are absorbed and filtered by the biological membrane, and the purposes of degradation and removal are achieved. In addition, the filter material in the biological filter material layer 4023 can also effectively remove suspended substances SS, iron, manganese and the like. After the micro-polluted water is contacted with the biological membrane for 12-24 hours, the biological filtration filter material layer 4023 needs to be subjected to back washing, and the back-washed drainage water is discharged into the regulating tank 3 through a back-washing drainage pipe 4028 and a back-washing drainage channel 4025. The water treated by the biological filter 402 is discharged into the biological adsorption device 403 through the filtering water channel 4024 and the reaction zone water outlet pipe 4014.
In the bio-adsorption apparatus 403, the carbon fiber bundle packing assembly 4031 has a large specific surface area and a large number of micropores to have an adsorption and retention function, and the surface of the packing bundle can form a layer of biofilm which can perform a function of removing micro-contamination through biodegradation. In the process of contacting the micro-polluted water with the carbon fiber bundle packing assembly 4031, organic matters, ammonia nitrogen, iron, manganese and chromaticity in the micro-polluted water are gradually oxidized and converted through the metabolism activity of microorganisms and the comprehensive actions of biological flocculation, adsorption and the like, so that the aim of strengthening and purifying the water quality is fulfilled. The water treated by the biological adsorption device 403 is discharged into the sequencing batch type ecological artificial wetland subsystem 5 through the biological adsorption water outlet channel 4033 and the biological adsorption water outlet pipe 4035.
S03: and discharging the micro-polluted water treated by the composite biological reaction subsystem into a sequencing batch ecological artificial wetland subsystem so as to enable the sequencing batch ecological artificial wetland subsystem to carry out flooding adsorption and water discharging reoxygenation sequencing batch treatment.
The micro-polluted water treated by the composite biological reaction subsystem 4 enters the sequencing batch ecological artificial wetland subsystem 5 through the biological adsorption water outlet channel 4033, the biological adsorption water outlet pipe 4035 and the water inlet well water inlet pipe 504. The micro-polluted water is accumulated in the water inlet well 501 to a certain degree and then is discharged into the ecological artificial wetland 502 by adopting a slow-forward and fast-discharge mode, so that the sequential batch operation of flooding adsorption and water discharge reoxygenation is realized. Specifically, water uniformly passes through the ecological packing layer 5022 by uniform water distribution of the water distribution pipe 5028, and the water level gradually rises to a position higher than the ecological soil layer 5024. In the process of gradually rising water level, water of the water source is fully contacted with the ecological filler layer 5022 and microorganisms, and the ecological filler layer 5022 can deeply purify the water through the synergistic effect of physics, chemistry and biology. After the micro-polluted water reaches a certain time in the ecological artificial wetland 502, the water collecting pipe 5025 is opened, the ecological artificial wetland 502 drains water instantly, and the water level in the wetland drops rapidly. When the water level in the wetland is rapidly reduced, the wetland enters an evacuation and reoxygenation stage, and oxygen in the atmosphere rapidly enters the wetland through gaps among the oxygen extraction pipes 5026, the oxygen extraction branch pipes 5027 and the ecological filler layer 5022 for microorganisms in the wetland to utilize. After the evacuation and reoxygenation are finished, all the water in the ecological artificial wetland 502 is discharged into the water outlet well 503, and water is fed from the water inlet well 501 again, and the next cycle is started.
S04: and discharging the micro-polluted water treated by the sequencing batch type ecological artificial wetland subsystem into an ecological water storage pond so as to discharge the water into a water purification plant after stabilizing the water quality.
The micro-polluted water treated by the sequencing batch type ecological constructed wetland subsystem 5 enters an ecological water storage pond 6 through a water inlet pipe 601 of the water storage pond, and is discharged into a water purification plant for conventional water purification treatment through a water outlet pipe 602 of the water storage pond after the quality of the outlet water is stabilized through a biomembrane structural layer 603 and planted submerged plants 604.
In the biological ecological restoration device system and method for the micro-polluted drinking water source provided by the embodiment of the application, the natural substrate or the artificial substrate is utilized to strengthen the life activities of cultivating plants and microorganisms, and organic pollutants (COD) and ammonia Nitrogen (NH) in the micro-polluted water source3-N), nitric acid Nitrogen (NO)2-N), iron, manganese, chromaticity and turbidity to be intercepted, transferred, converted and degraded, thereby purifying the quality of the slightly polluted drinking water source. The system and the method provided by the embodiment of the application have the advantages of ecology, high efficiency, easiness in management and protection, low cost, low energy consumption and no pollution.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It is to be understood that relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. The invention is not limited to the precise arrangements described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.

Claims (10)

1. A biological ecological restoration system for a micro-polluted drinking water source is characterized by comprising a micro-polluted water source (1), a water taking pump station (2), a regulating pond (3), a composite biological reaction subsystem (4), a sequencing batch type ecological artificial wetland subsystem (5) and an ecological water storage pond (6) which are sequentially communicated; a combined revetment (7) and an ecological floating bed (8) are arranged at the periphery of the micro-polluted water source (1), and the ecological floating bed (8) is close to the micro-polluted water source (1); the compound biological reaction subsystem (4) is communicated with a fan (9).
2. The micro-polluted drinking water source biological ecological restoration system according to claim 1,
a regulating reservoir water inlet pipe (301) is arranged on the side wall of the regulating reservoir (3), and the regulating reservoir water inlet pipe (301) is communicated with the water taking pump station (2);
a water collecting pit (302) is arranged at the bottom of the regulating pool (3), a solar lifting pump (303) is arranged in the water collecting pit (302), a solar lifting pump water conveying pipe (304) is installed at the outlet of the solar lifting pump (303), and the solar lifting pump water conveying pipe (304) is communicated to the composite biological reaction subsystem (4);
a plurality of adjusting tank clapboards (305) are arranged inside the adjusting tank (3); the length of the adjusting tank clapboard (305) is gradually reduced from the adjusting tank water inlet pipe (301) to the direction of the water collecting pit (302).
3. The system for the biological ecological restoration of a micro-polluted drinking water source as claimed in claim 1, wherein the composite biological reaction subsystem (4) comprises an anoxic/aerobic biological reaction device (401), a biological filtration device (402) and a biological adsorption device (403) which are sequentially communicated with each other from top to bottom; the fan (9) is respectively communicated with the bottoms of the anoxic/aerobic biological reaction device (401), the biological filtering device (402) and the biological adsorption device (403).
4. The micro-polluted drinking water source bio-ecological restoration system according to claim 3, wherein the anoxic/aerobic biological reaction device (401) comprises a reaction zone (4011), a suspended combined packing (4012) disposed in the reaction zone (4011), and a reaction zone inlet pipe (4013) and a reaction zone outlet pipe (4014) disposed on a side wall of the anoxic/aerobic biological reaction device (401);
the reaction zone (4011) is also provided with a reaction separation plate (4015), and the bottom of the reaction separation plate (4015) is close to the bottom of the reaction zone (4011); a first aeration pipe (901) of the fan (9) is positioned below the reaction zone (4011), and the end part of the first aeration pipe is positioned at the reaction separation plate (4015);
the upper part of the reaction zone (4011) is provided with a reaction zone water inlet channel (4016) and a reaction zone water outlet channel (4017); the reaction zone water inlet pipe (4013) is respectively communicated with the regulating reservoir (3) and the reaction zone water inlet channel (4016), and the reaction zone water outlet pipe (4014) is respectively communicated with the reaction zone water outlet channel (4017) and the biological filtering device (402).
5. The system for biologically and ecologically restoring a micro-polluted drinking water source as claimed in claim 3, wherein the second aeration pipe (902), the filter plate and filter head assembly (4021), the biological filtration supporting layer (4022) and the biological filtration material layer (4023) are arranged in the biological filtration device (402) from bottom to top; the fan (9) is communicated with the second aeration pipe (902);
a filtering water outlet channel (4024), a back washing water discharge channel (4025), a filtering water inlet pipe (4026) and a filtering water outlet pipe (4027) are arranged above the biological filtering material layer (4023); a back washing drain pipe (4028) is arranged below the filter plate and filter head assembly (4021);
the filtering water outlet pipe (4027) is respectively communicated with the biological adsorption device (403) and the filtering water outlet channel (4024);
the filtering water inlet pipe (4026) is communicated with the anoxic/aerobic biological reaction device (401), and the backwashing water discharge pipe (4028) is communicated with the backwashing water discharge channel (4025).
6. The system for the biological ecological restoration of a micro-polluted drinking water source as claimed in claim 3, wherein a third aeration pipe (903) and a carbon fiber bundle packing assembly (4031) are arranged inside the biological adsorption device (403) from bottom to top;
a bio-adsorption water inlet channel (4032), a bio-adsorption water outlet channel (4033), a bio-adsorption water inlet pipe (4034) and a bio-adsorption water outlet pipe (4035) are arranged above the carbon fiber bundle packing component (4031);
the biological adsorption water inlet pipe (4034) is respectively communicated with the biological filtering device (402) and the biological adsorption water inlet channel (4032);
the biological adsorption water outlet pipe (4035) is respectively communicated with the biological adsorption water outlet channel (4033) and the sequencing batch type ecological artificial wetland subsystem (5).
7. The biological ecological restoration system for the micro-polluted drinking water source as claimed in claim 1, wherein the sequencing batch type ecological artificial wetland subsystem (5) comprises an inlet well (501), an ecological artificial wetland (502) and an outlet well (503) which are communicated with each other;
a water inlet well water inlet pipe (504) is arranged at the upper part of the side wall of the water inlet well (501), and the water inlet well water inlet pipe (504) is respectively communicated with the composite biological reaction subsystem (4) and the water inlet well (501);
a water outlet well water outlet pipe (505) is arranged at the lower part of the side wall of the water outlet well (503), and the water outlet well water outlet pipe (505) is respectively communicated with the ecological water storage pond (6) and the water outlet well (503);
an ecological water collecting layer (5021), an ecological filler layer (5022), an ecological water distribution layer (5023) and an ecological soil layer (5024) are sequentially arranged in the ecological artificial wetland (502) from bottom to top;
a water collecting pipe (5025) is arranged in the ecological water collecting layer (5021); one end of the water collecting pipe (5025) is closed, and the other end of the water collecting pipe is communicated with the water outlet well (503);
an oxygen extraction pipe (5026) is arranged in the ecological filler layer (5022), a vertical oxygen extraction branch pipe (5027) is arranged on the oxygen extraction pipe (5026), and the end part of the oxygen extraction branch pipe (5027) is exposed out of the ecological soil layer (5024);
a water distribution pipe (5028) is arranged in the ecological water distribution layer (5023), one end of the water distribution pipe (5028) is closed, and the other end of the water distribution pipe is communicated with the water inlet well (501);
and a hygrophyte (5029) is planted on the ecological soil layer (5024).
8. The biological ecological restoration system for the micro-polluted drinking water source according to claim 1, wherein a water storage pond water inlet pipe (601) and a water storage pond water outlet pipe (602) are arranged on the side wall of the slope of the ecological water storage pond (6), the water storage pond water inlet pipe (601) is communicated with the sequencing batch type ecological artificial wetland subsystem (5), and the water storage pond water outlet pipe (602) is connected with a water purification plant;
a biological membrane structural layer (603) is arranged at the bottom of the ecological water storage pond (6), and submerged plants (604) are planted on the biological membrane structural layer (603); pond slope plants (605) are also planted on the slope side wall of the ecological water storage pond (6).
9. The micro-polluted drinking water source biological ecological restoration system according to claim 1, wherein the combined revetment (7) comprises a protective zone (701), an ecological water tank (702), a natural slope prevention zone (703) and a green belt (704) which are arranged in sequence from the micro-polluted water source (1) to the water intake pump station (2); wherein the guard band (701) and the natural slope prevention band (703) are in the form of a slope.
10. A biological ecological restoration method for a micro-polluted drinking water source is characterized by comprising the following steps:
after being treated by an ecological floating bed and a combined revetment, a micro-polluted water source is discharged into a regulating reservoir through a water taking pump station so as to regulate the water quantity of the regulating reservoir;
discharging the micro-polluted water with the water quantity regulated by the regulating reservoir into a composite biological reaction subsystem so as to degrade or remove organic matters, ammonia nitrogen and nitrite nitrogen in the micro-polluted water by the composite biological reaction subsystem;
discharging the micro-polluted water treated by the composite biological reaction subsystem into a sequencing batch ecological artificial wetland subsystem so as to enable the sequencing batch ecological artificial wetland subsystem to carry out flooding adsorption and water discharging reoxygenation sequencing batch treatment;
and discharging the micro-polluted water treated by the sequencing batch type ecological artificial wetland subsystem into an ecological water storage pond so as to discharge the water into a water purification plant after stabilizing the water quality.
CN202010803602.6A 2020-08-11 2020-08-11 Micro-polluted drinking water source biological ecological restoration system and method Pending CN111943434A (en)

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