CN113045120B - Physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system and process - Google Patents

Physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system and process Download PDF

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CN113045120B
CN113045120B CN202110285526.9A CN202110285526A CN113045120B CN 113045120 B CN113045120 B CN 113045120B CN 202110285526 A CN202110285526 A CN 202110285526A CN 113045120 B CN113045120 B CN 113045120B
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aquaculture
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CN113045120A (en
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孔令为
张沛
鞠峰
刘剀
陈小刚
胡多飞
李凌
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Westlake University
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Abstract

The invention discloses a physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system and a technology, wherein the system comprises a physicochemical strengthening treatment system, a biological-ecological coupling treatment system, an ecological treatment system and an aquaculture area which are sequentially connected to form a circulating loop, an intelligent water quality online monitoring system and connecting pipelines for connecting the systems and the areas; surpassing pipelines are respectively arranged between the water outlet of the aquaculture area and the water inlet of the ecological pond and the water inlet of the strengthening treatment equipment, and a return pipeline is arranged between the water outlet of the subsurface flow wetland system in the biological-ecological coupling treatment system and the water inlet of the aquaculture area; the intelligent water quality on-line monitoring system monitors the quality of wastewater at the water outlet of the aquaculture area, regulates and controls the water flow in each connecting pipeline, the overtaking pipeline and the backflow pipeline according to the set target water quality requirement, and realizes the automatic control optimization learning and selection of different water flow channel lines.

Description

Physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system and process
Technical Field
The invention relates to the field of aquaculture wastewater treatment, in particular to a physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system and a technology.
Background
The aquaculture water body has the characteristics of large water quantity, less pollutant types, small content change and the like, so most aquaculture wastewater belongs to micro-polluted water, the pollution load is relatively low, the treatment is also relatively easy, but some aquaculture is sensitive to the water quality requirement, a relatively mature and perfect treatment process is required, low consumption and high efficiency are required, and the cyclic utilization is realized.
At present, aquaculture wastewater mainly comprises treatment means (for example, patent technologies with publication numbers of CN109179879A and CN 110028203A) such as physics (represented by mechanical filtration, foam separation and the like), chemistry (represented by chemical oxidation such as ozone, hydrogen peroxide and the like), biology (represented by algae, microorganisms and the like) and ecology (represented by ecological ponds, artificial wetlands and the like) and the like, but the problems of high energy consumption, unsuitability for large-scale use, secondary pollution, large occupied area, large temperature influence, unstable efficiency and the like exist in actual treatment, particularly, the problem of blockage is easily caused when the artificial wetland technology is subjected to imperfect pretreatment or continuous operation, and the application of the technology is limited.
Therefore, it is necessary to develop optimization research of energy consumption reduction technology, reduce floor area by adopting comprehensive and intensified technology, obtain big data for analysis by using intelligent online monitoring technology, automatically select proper process combination according to water quality detection result, and realize stable water quality reaching standards and recycling.
Disclosure of Invention
Aiming at the technical problems and the problems of high energy consumption, large occupied area, poor low-temperature effect, easy blockage, low automation degree, few application scenes and the like of the traditional aquaculture wastewater treatment technology, the invention provides a physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system, which can intelligently and automatically select a proper process and a proper combination thereof in real time according to a water quality monitoring result, realizes blockage resistance and low-temperature effect reinforcement, can accurately control the process according to water quality change and saves energy consumption, and is applied to the field of aquaculture wastewater treatment.
A physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system comprises a physicochemical strengthening treatment system, a biological-ecological coupling treatment system, an ecological treatment system and an aquaculture area which are sequentially connected to form a circulating loop, an intelligent water quality online monitoring system and connecting pipelines for connecting the systems and the areas;
the physical and chemical strengthening treatment system comprises a plurality of physical and chemical treatment units, wherein each physical and chemical treatment unit is internally provided with a photocatalytic strengthening material and submerged plants;
the biological-ecological coupling treatment system comprises an ecological pond, an enhanced treatment device and a subsurface flow wetland system which are sequentially connected, wherein the enhanced treatment device comprises a device which can implement one or more combined processes of A/O, SBR, magnetic coagulation and anti-blocking artificial wetland;
the ecological treatment system comprises an undercurrent wetland system;
an overrunning pipeline is respectively arranged between the water outlet of the aquaculture area and the water inlet of the ecological pond and between the water inlet of the strengthening treatment equipment, and a backflow pipeline is arranged between the water outlet of the subsurface flow wetland system in the biological-ecological coupling treatment system and the water inlet of the aquaculture area;
the intelligent water quality on-line monitoring system monitors the quality of wastewater at the water outlet of the aquaculture area, regulates and controls the water flow in each connecting pipeline, the surpassing pipeline and the backflow pipeline according to the set target water quality requirement, and realizes the self-control optimization learning and selection of different water flow channel lines.
In the invention, a physical and chemical strengthening treatment system is used as a pretreatment unit to strengthen removal of solid suspended matters, organic pollutants and the like and reduce the pollutant load of a subsequent treatment unit; the biological-ecological coupling treatment system, particularly an ecological pond, an enhanced treatment device and the like in the biological-ecological coupling treatment system, further reduces pollutants such as nitrogen, phosphorus and the like, effectively decontaminates solid suspended matters and reduces the blocking probability of a subsequent treatment unit; the subsurface flow wetland system and the ecological treatment system in the biological-ecological coupling treatment system are used as an advanced treatment unit to stabilize the effluent quality of the system. All the systems and the processing units complement each other, complement each other in advantages and play their own roles, and ensure the standard water output of the systems together.
The arrangement sequence of each system and unit has the characteristics, the biological-ecological coupling treatment system cannot be arranged at the front end as a pretreatment unit, otherwise, the load is too high, so that the ecological pond system is impacted or the anti-blocking effect of the strengthening treatment equipment is weakened; the ecological treatment system can not be arranged at the front end, otherwise, the system is easy to be quickly blocked when the concentration of the solid suspended matters in the inlet water is high.
Preferably, in each physical and chemical processing unit:
the filling volume ratio of the photocatalytic strengthening material is 20-60%, and the photocatalytic strengthening material is a mesh or honeycomb porous suspension type photocatalytic material;
the submerged plant is one or more of eel grass, curly pondweed, black algae, foxtail algae and potamogeton sonchifolia, and the planting density is 5-20 plants/m 2 。
Preferably, the filling volume ratio of the photocatalytic enhancing material in each physical and chemical treatment unit increases in the water flow direction.
Preferably, the ecological pond comprises submerged plants, an ecological floating island and an aeration system;
the submerged plant in the ecological pond is one or a combination of more of eel grass, curly pondweed, hydrilla, watermifoil and eyeweed, and the planting density is 5-20 plants/m 2 ；
The ecological floating island is in a fixed suspension type or an intelligent movable suspension type, and the coverage degree is 5% -10%;
the aeration system is one or a combination of several of submerged aeration equipment or solar suspension aeration equipment, and the power is 30W-2 KW.
Preferably, the subsurface flow wetland system is one or a combination of several of horizontal subsurface flow and vertical subsurface flow with the same or different areas, blocks and shapes.
Preferably, the aquaculture area is divided into a plurality of sub-areas according to the water quality requirement, wherein the sub-area with the highest water quality requirement is connected with the ecological treatment system and the return pipeline, and the sub-area with the lowest water quality requirement is connected with the physicochemical strengthening treatment system and the surpassing pipeline.
Preferably, the intelligent water quality online monitoring system comprises a water quality monitoring sensing probe, an information transmission early warning module and a data analysis processing control module, and water flow in each connecting pipeline, the overtaking pipeline and the backflow pipeline is regulated and controlled after water quality conditions are monitored in real time and data are analyzed, so that automatic control optimization learning and selection of different water flow channel lines are realized.
The invention also provides a physicochemical-biological-ecological coupling automatic control optimization learning aquaculture wastewater recycling treatment process, which comprises the following steps: the aquaculture wastewater circulating treatment system is used for monitoring the wastewater quality of the water outlet of the aquaculture area by using the intelligent online water quality monitoring system, regulating and controlling the water flow in each connecting pipeline, the surpassing pipeline and the backflow pipeline according to the set target water quality requirement, realizing the automatic control optimization learning and selection of different water flow channel lines and finishing the aquaculture wastewater circulating treatment.
Compared with the prior art, the invention has the main advantages that:
1) The method comprehensively adopts physical, chemical, biological and ecological methods and process combinations thereof, has strong pertinence, low consumption and high efficiency, and is green and environment-friendly; effluent of the treatment process combination flows through an aquaculture area with high water quality requirement and an aquaculture area with low water quality requirement in sequence, and the water quality zone control requirements of different aquaculture functional areas are met;
2) The treatment unit is reasonably arranged, the three can be organically coupled, the respective technical advantages are respectively exerted, the physicochemical technology strengthens the removal of organic matters and antibiotics in the water body and the reduction of solid suspended matters, the blockage of subsequent units is prevented, the pollution is reduced, and the occupied area is reduced; the biological treatment unit can remove pollutants in an enhanced manner and further reduce suspended matters; the ecological treatment technology finally strengthens the removal of nitrogen and phosphorus;
3) The water quality data are accumulated and analyzed through the intelligent water quality monitoring system, so that different processing units are controlled and selected according to the real-time water quality data, whether follow-up processes are adopted or not can be reasonably selected, accurate automatic control is realized, energy consumption is saved, and the wetland process blocking probability is reduced.
Drawings
FIG. 1 is a schematic structural diagram of an aquaculture wastewater recycling system with physicochemical-biological-ecological coupling auto-control optimization learning according to an embodiment, wherein:
1-a physical and chemical strengthening treatment system; 2-a physical and chemical strengthening treatment system; 3-a bio-ecological coupling treatment system; 4-a bio-ecological coupling treatment system; 5-an ecological treatment system; 6-an ecological treatment system; 7-aquaculture area; a class 8-I farm; 9-II type culture areas; 10-class III breeding; 11-1# physical and chemical processing unit; 12-2# physical and chemical processing unit; 13-3# physical and chemical processing unit; 14-a reinforcing material; 15-a reinforcing material; 16-a reinforcing material; 17-submerged plants; 18-an ecological pond; 19-an ecological pond; 20-an ecological floating island; 21-an aeration system; 22-submerged plants; 23-intensive treatment equipment; 24-subsurface flow wetland system; 25-subsurface flow wetland system; 26-subsurface flow wetland system; 27-an intelligent water quality on-line monitoring system; 28-electromagnetic three-way valve; 29-electromagnetic three-way valve; 30-electromagnetic three-way valve; 31-an electromagnetic three-way valve; 32-electromagnetic three-way valve; 33-electromagnetic three-way valve; 34-an electromagnetic three-way valve; 35-electromagnetic three-way valve; 36-connecting the lines.
Detailed Description
The invention is further described with reference to the following drawings and specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
As shown in fig. 1, the system for recycling aquaculture wastewater through physicochemical-biological-ecological coupling auto-control optimization learning of the present embodiment comprises physicochemical enhanced treatment systems (1, 2), biological-ecological coupling treatment systems (3, 4), ecological treatment systems (5, 6) and aquaculture areas 7, which are connected in sequence to form a circulation loop, an intelligent online water quality monitoring system 27 and a connecting pipeline 36 for connecting each system and area.
The physical and chemical strengthening treatment systems 1 and 2 are connected in parallel and are respectively provided with 3 strengthening treatments connected in seriesThe units are a 1# physicochemical treatment unit 11, a 2# physicochemical treatment unit 12 and a 3# physicochemical treatment unit 13 in sequence along the water flow direction. Photocatalytic strengthening materials (14-16) and submerged plants 17 are arranged in each physical and chemical treatment unit (11-13). Specifically, the # 1 physicochemical treatment unit 11, the # 2 physicochemical treatment unit 12 and the # 3 physicochemical treatment unit 13 are respectively and sequentially provided with a reticular or honeycomb porous suspension type photocatalytic material with the filling volume ratio of 20%, 40% and 60%. The submerged plant 17 is one or more of herba Sonchi Oleracei, curly pondweed, black algae, foliumet tailer, and herba Eupatorii, and has planting density of 5-20 plants/m 2 。
The biological-ecological coupling treatment systems 3 and 4 are connected in parallel and respectively comprise ecological ponds 18 and 19, strengthening treatment equipment 23 and a subsurface flow wetland system 24 which are sequentially connected in series along the water flow direction, and the strengthening treatment equipment 23 comprises equipment capable of implementing one or more combined processes of A/O, SBR, magnetic coagulation and anti-blocking artificial wetland. Each of the ecological ponds 18, 19 includes a submerged plant 22, an ecological floating island 20, and an aeration system 21, respectively. The submerged plant 22 is one or more of herba Sonchi Oleracei, curly pondweed, black algae, foliumet tailer, and herba Eupatorii, and has planting density of 5-20 plants/m 2 . The ecological floating island 20 is in a fixed suspension type or an intelligent movable suspension type, and the coverage degree is 5% -10. The aeration system 21 is one or a combination of several of submerged aeration equipment or solar suspension aeration equipment, and the power is 30W-2 KW.
The ecological treatment system 5 comprises subsurface wetland systems (25, 26). The subsurface flow wetland systems 24-26 are one or a combination of several of horizontal subsurface flow and vertical subsurface flow with the same or different areas, blocks and shapes.
The aquaculture area 7 is divided into three sub-areas according to the water quality requirement, wherein the sub-area with the highest water quality requirement is a type I culture area 8, the sub-area with the lowest water quality requirement is a type III culture area 10, and the middle sub-area is a type II culture area 9. An electromagnetic three-way valve 28 is arranged at a wastewater outlet of the type III culture area 10, the remaining two interfaces of the electromagnetic three-way valve 28 are respectively connected with electromagnetic three-way valves 29 and 30, the remaining two interfaces of the electromagnetic three-way valve 29 are respectively connected with water inlets of the enhanced treatment systems 1 and 2, the remaining two interfaces of the electromagnetic three-way valve 30 are respectively connected with electromagnetic three- way valves 31 and 32, the remaining two interfaces of the electromagnetic three-way valve 31 are respectively connected with water inlets of the ecological ponds 18 and 19, the remaining two interfaces of the electromagnetic three-way valve 32 are respectively connected with water inlets of enhanced treatment equipment in the biological-ecological coupling treatment systems 3 and 4, water outlets of the biological-ecological coupling treatment systems 3 and 4 are connected with two interfaces of the electromagnetic three-way valve 33, the remaining one interface of the electromagnetic three-way valve 33 is connected with the electromagnetic three-way valve 34, the remaining two interfaces of the electromagnetic three-way valve 34 are respectively connected with a water inlet of the subsurface wetland system 25 and the electromagnetic three-way valve 35, and the remaining two interfaces of the electromagnetic three-way valve 35 are respectively connected with water inlets of the type I culture area 8 and the type II culture area 9. The water outlet of the subsurface flow wetland system 26 is connected with the water inlet of the I-type culture area 8.
The intelligent water quality on-line monitoring system 27 monitors the quality of wastewater at the water outlet of the aquaculture area 7 and regulates and controls the water flow passing through each connecting pipeline 36 and the electromagnetic three-way valves (28-35) according to the set target water quality requirement, thereby realizing the automatic control optimization learning and selection of different water flow channel lines. Specifically, the intelligent online water quality monitoring system 27 includes a water quality monitoring sensing probe, an information transmission early warning module and a data analysis processing control module, and automatically controlled optimization learning and selection of different water channel lines are realized by monitoring the water quality condition in real time, analyzing data, and then regulating and controlling the water flow passing through the connecting pipelines 36 and the electromagnetic three-way valves (28-35).
The aquiculture wastewater circulating treatment process for performing physicochemical-biological-ecological coupling automatic control optimization learning by using the aquiculture wastewater circulating treatment system comprises the following steps: the intelligent water quality on-line monitoring system 27 is used for monitoring the water quality of the wastewater at the water outlet of the aquaculture area 7, regulating and controlling the water flow flowing through each connecting pipeline 36 and the electromagnetic three-way valves (28-35) according to the set target water quality requirement, realizing the automatic control optimization learning and selection of different water flow channel lines and finishing the aquaculture wastewater circular treatment. For example:
1. according to the monitoring and analysis results of the intelligent water quality online monitoring system 27, the wastewater can be automatically controlled to be uniformly distributed to the two groups of physical and chemical treatment units (11, 12 and 13) from the electromagnetic three-way valves (28 and 29) and the pipeline 36, then flows into the I-type culture area 8, the II-type culture area 9 and the III-type culture area 10 respectively after being treated by the biological-ecological coupling treatment systems (3 and 4) and the subsurface wetland systems (5 and 6), and then flows out, and flows into the two groups of physical and chemical treatment units (11, 12 and 13) again through the electromagnetic three-way valves (28 and 29) and the pipeline 36 to realize water circulation;
2. according to the monitoring and analysis results of the intelligent water quality online monitoring system 27, the wastewater can be automatically controlled to be distributed evenly to the two groups of biological-ecological coupling treatment systems (3 and 4) from the electromagnetic three-way valves (28, 30, 31 and 32) and the pipeline 36, and then flows into the I-type culture area 8, the II-type culture area 9 and the III-type culture area 10 through the electromagnetic three-way valves (33, 34 and 35) and the pipeline 36 after being treated by the subsurface wetland system 24, and then flows out, and flows into the two groups of biological-ecological coupling treatment systems (3 and 4) through the electromagnetic three-way valves (28, 30, 31 and 32) and the pipeline 36 again to realize water circulation;
3. according to the monitoring and analyzing result of the intelligent water quality online monitoring system 27, the wastewater can be automatically controlled to be uniformly distributed to two groups of biological-ecological coupling treatment systems (3 and 4) from electromagnetic three-way valves (28, 30, 31 and 32) and a pipeline 36, the wastewater is treated by the strengthening treatment equipment 23 and the subsurface flow wetland system 24 and then flows to the subsurface flow wetland systems (25 and 26) through the electromagnetic three-way valves (33 and 34) and the pipeline 36, the wastewater after deep treatment flows into the I-type culture area 8, the II-type culture area 9 and the III-type culture area 10 in sequence and then flows out, and then the wastewater flows into two groups of physicochemical treatment units (11, 12 and 13) through the electromagnetic three-way valves (28 and 29) and the pipeline 36 to realize water circulation.
Application example 1
According to the aquaculture wastewater circulation treatment system of the embodiment, an aquaculture wastewater circulation demonstration area in construction serves as a multi-technology wastewater treatment means, an intelligent learning automatic process route technology research and demonstration display base based on big data, the occupation area of the aquaculture wastewater circulation demonstration area is about 7 mu of land, the treatment area is divided into 4 areas, the occupation area is about 3.6 mu of land, the area of the aquaculture area is about 3.4 mu of land, and the area is divided into 3 different aquaculture areas.
The demonstration area of the aquaculture wastewater circulating treatment system based on physicochemical-biological-ecological coupling automatic control optimization learning comprises a physicochemical strengthening treatment system, a biological-ecological coupling treatment system, an ecological treatment system, an aquaculture area and an intelligent water quality online monitoring system;
the physicochemical strengthening treatment system comprises two groups of physicochemical treatment units for comparative study, strengthening materials and submerged plants; the two groups of physical and chemical treatment units comprise strengthening materials, wherein one group comprises submerged plants;
the biological-ecological coupling treatment system comprises an ecological pond, an enhanced treatment device and an underflow wetland system; the ecological pond comprises submerged plants, an ecological floating island and an aeration system;
the ecological treatment system comprises an undercurrent wetland system;
the physical and chemical strengthening treatment system, the biological-ecological coupling treatment system, the ecological treatment system and the aquaculture area are connected through pipelines and an electromagnetic three-way valve, the area scales of the systems are determined by the intelligent water quality online monitoring system and the water quality target requirement, and the automatic control optimization learning and selection of different water flow channel lines are realized;
the physical and chemical treatment unit comprises a strengthening material and submerged plants; the strengthening material is a reticular suspension type photocatalytic material with the filling ratio of 20%, 40% and 60% in sequence according to the sequence of the physical and chemical treatment units; submerged plants are planted in a side physical and chemical treatment unit, mainly comprising the combination of tape grass and hydrilla verticillata, and the planting density is 15 emergent aquatic plants/m 2 。
The aquaculture wastewater circulating treatment system for physicochemical-biological-ecological coupling self-control optimization learning also comprises an ecological pond; the ecological pond comprises submerged plants, an ecological floating island and an aeration system; the submerged plant is one or more of bitter grass, curly pondweed, black algae, watermifoil and potamogeton indica, and the planting density is 5-20 emergent aquatic plants/m 2 ；
The ecological floating island is in a traditional fixed suspension type in the market, and the coverage degree is 5%;
the aeration system is 2 sets of solar energy suspension aeration equipment, and the power is 0.75KW.
The aquaculture wastewater circulating treatment system for physicochemical-biological-ecological coupling automatic control optimization learning also comprises a strengthening treatment device and an undercurrent wetland system;
the strengthening treatment equipment is 10 sets of anti-blocking integrated equipment, the technical process is anti-blocking artificial wetland, and the standard scale of the single equipment is 1-2 tons/day;
the subsurface flow wetland system is composed of 2 parallel horizontal subsurface flow wetlands (monomer size: 15m: 10m: 1.2m) and 2 serial horizontal subsurface flow wetlands (monomer size: 30m: 20m: 1.2m);
the aquaculture area comprises a type I culture area, a type II culture area and a type III culture area; the I-type culture area is an aquaculture area with higher requirement on water quality; the II-class culture area and the III-class culture area are sequentially aquaculture areas with low requirements on water quality;
the I-type culture area receives effluent from the subsurface flow wetland system, sequentially flows through the II-type culture area and the III-type culture area, passes through the electromagnetic three-way valve and the pipeline, is automatically monitored and analyzed by the intelligent water quality online monitoring system, and then selectively enters the physicochemical treatment unit, the biological-ecological coupling treatment system or the subsurface flow wetland system for treatment and then flows into the I-type culture area to form water flow circulation.
The intelligent water quality on-line monitoring system comprises a water quality monitoring sensing probe, an information transmission early warning module and a data analysis processing control module, and realizes the process route selection of a plurality of water flow channels under the assistance of an electromagnetic three-way valve and a pipeline according to the water quality and water quantity conditions after the data is monitored and analyzed in real time.
In the application example, the condition that the requirement on the quality of the effluent of the system in the treatment area is high or the concentration of pollutants in the effluent of the culture area (the water inlet end of the treatment area) is high is simulated, and the whole process flow is required to be connected with water treatment and circulation. According to the monitoring and analysis results of the intelligent water quality online monitoring system, the wastewater can be automatically controlled to evenly distribute water to the two sets of physical and chemical treatment units from the electromagnetic three-way valve and the pipeline, the wastewater is treated by the biological-ecological coupling treatment system and the subsurface flow wetland system in sequence and then flows into the I-type culture area, the II-type culture area and the III-type culture area respectively, then the wastewater is discharged, and the wastewater flows into the two sets of physical and chemical treatment units through the electromagnetic three-way valve and the pipeline again to realize water circulation.
Application example 2
According to the aquaculture wastewater circulating treatment system of the embodiment, the constructed aquaculture wastewater circulating demonstration area is used as a multi-technology sewage treatment means, and an intelligent learning automatic process route technology research and demonstration display base based on big data, the occupation area of the aquaculture wastewater circulating treatment system occupies about 7 mu of land, wherein the treatment area is planned to be divided into 4 areas occupying about 3.6 mu of land, the culture area occupies about 3.4 mu of land, and the aquaculture wastewater circulating treatment system is divided into 3 different aquaculture areas.
The demonstration area of the aquaculture wastewater circulating treatment system based on physicochemical-biological-ecological coupling automatic control optimization learning comprises a physicochemical strengthening treatment system, a biological-ecological coupling treatment system, an ecological treatment system, an aquaculture area and an intelligent water quality online monitoring system;
the physicochemical strengthening treatment system comprises two groups of physicochemical treatment units for comparative study, strengthening materials and submerged plants; the two groups of physical and chemical treatment units comprise strengthening materials, wherein one group comprises submerged plants;
the biological-ecological coupling treatment system comprises an ecological pond, an enhanced treatment device and an underflow wetland system; the ecological pond comprises submerged plants, an ecological floating island and an aeration system;
the ecological treatment system comprises an undercurrent wetland system;
the physical and chemical strengthening treatment system, the biological-ecological coupling treatment system, the ecological treatment system and the aquaculture area are connected through pipelines and an electromagnetic three-way valve, the area scales of the respective systems are determined by depending on the intelligent water quality online monitoring system and the water quality target requirement, and the automatic control optimization learning and selection of different water flow channel lines are realized;
the physical and chemical treatment unit comprises a strengthening material and submerged plants; the strengthening material is a reticular suspension type photocatalytic material with the filling ratio of 20%, 40% and 60% in sequence according to the sequence of the physical and chemical treatment units; submerged plants are planted in a side physical and chemical treatment unit, mainly comprising the combination of tape grass and hydrilla verticillata, and the planting density is 15 plants/m of emergent aquatic plants 2 。
An aquaculture wastewater circulating treatment system for physicochemical-biological-ecological coupling automatic control optimization learning, and further comprises an ecological pond; the ecological pond comprises submerged plants, an ecological floating island and an aeration system; the submerged plant is one or several of bitter grass, curly pondweed, black alga, watermifoil and eyeweed, and the planting density is 5-20 emergent aquatic plants/m 2 ；
The ecological floating island is a traditional fixed suspension type on the market, and the coverage degree is 5%;
the aeration system is 2 sets of solar suspension aeration equipment, and the power is 0.75KW.
The aquaculture wastewater circulating treatment system for physicochemical-biological-ecological coupling automatic control optimization learning also comprises a strengthening treatment device and an undercurrent wetland system;
the strengthening treatment equipment is 10 sets of anti-blocking integrated equipment, the technical process is anti-blocking artificial wetland, and the standard scale of the single equipment is 1-2 tons/day;
the subsurface flow wetland system is 2 pieces of horizontal subsurface flow wetland in parallel (monomer size: 15m: 10m: 1.2m);
the aquaculture area comprises a type I culture area, a type II culture area and a type III culture area; the I-type culture area is an aquaculture area with higher requirement on water quality; the II-type culture area and the III-type culture area are sequentially aquaculture areas with low requirements on water quality;
the I-type culture area receives effluent from the subsurface flow wetland system, sequentially flows through the II-type culture area and the III-type culture area, passes through the electromagnetic three-way valve and the pipeline, is automatically monitored and analyzed by the intelligent water quality online monitoring system, and then selectively enters the physicochemical treatment unit, the biological-ecological coupling treatment system or the subsurface flow wetland system for treatment and then flows into the I-type culture area to form water flow circulation.
The intelligent water quality on-line monitoring system comprises a water quality monitoring sensing probe, an information transmission early warning module and a data analysis processing control module, and the process route selection of a plurality of water flow channels is realized under the assistance of an electromagnetic three-way valve and a pipeline according to the water quality and water quantity conditions after data are monitored and analyzed in real time.
In the application example, the requirement of effluent quality of the simulation system is not high or the early-stage sewage treatment is superior to the condition of limiting the discharge standard, and only part of the process flow is required to be connected with water treatment and circulation. According to the monitoring and analysis results of the intelligent water quality on-line monitoring system, the wastewater can be automatically controlled to evenly distribute water to the two groups of biological-ecological coupling treatment systems from the electromagnetic three-way valve and the pipeline, the wastewater is treated by the subsurface flow wetland system, then flows into the I-type culture area, the II-type culture area and the III-type culture area through the electromagnetic three-way valve and the pipeline respectively, then flows out, and flows into the two groups of biological-ecological coupling treatment systems through the electromagnetic three-way valve and the pipeline again to realize water circulation.
Application example 3
According to the aquaculture wastewater circulation treatment system of the embodiment, an aquaculture wastewater circulation demonstration area in construction serves as a multi-technology wastewater treatment means, an intelligent learning automatic process route technology research and demonstration display base based on big data, the occupation area of the aquaculture wastewater circulation demonstration area is about 7 mu of land, the treatment area is divided into 4 areas, the occupation area is about 3.6 mu of land, the area of the aquaculture area is about 3.4 mu of land, and the area is divided into 3 different aquaculture areas.
The demonstration area of the aquaculture wastewater circulating treatment system based on physicochemical-biological-ecological coupling automatic control optimization learning comprises a physicochemical strengthening treatment system, a biological-ecological coupling treatment system, an ecological treatment system, an aquaculture area and an intelligent water quality online monitoring system;
the physicochemical strengthening treatment system comprises two groups of physicochemical treatment units for comparative study, strengthening materials and submerged plants; the two groups of physical and chemical treatment units comprise strengthening materials, wherein one group comprises submerged plants;
the biological-ecological coupling treatment system comprises an ecological pond, an enhanced treatment device and an undercurrent wetland system; the ecological pond comprises submerged plants, an ecological floating island and an aeration system;
the ecological treatment system comprises an underflow wetland system;
the physical and chemical strengthening treatment system, the biological-ecological coupling treatment system, the ecological treatment system and the aquaculture area are connected through pipelines and an electromagnetic three-way valve, the area scales of the systems are determined by the intelligent water quality online monitoring system and the water quality target requirement, and the automatic control optimization learning and selection of different water flow channel lines are realized;
the physical and chemical treatment unit comprises a strengthening material and submerged plants; the strengthening material is sequentially a reticular suspension type photocatalytic material with the filling ratio of 20%, 40% and 60% according to the sequence of the physical and chemical treatment units; submerged plants are planted in a side physical and chemical treatment unit and mainly comprise bitterThe combination of grass and hydrilla verticillata has planting density of 15 emergent aquatic plants/m 2 。
The aquaculture wastewater circulating treatment system for physicochemical-biological-ecological coupling self-control optimization learning also comprises an ecological pond; the ecological pond comprises submerged plants, an ecological floating island and an aeration system; the submerged plant is one or more of bitter grass, curly pondweed, black algae, watery foxtail algae and pondweed, and the planting density is 5-20 emergent aquatic plants/m 2 ；
The ecological floating island is a traditional fixed suspension type on the market, and the coverage degree is 5%;
the aeration system is 2 sets of solar suspension aeration equipment, and the power is 0.75KW.
The aquaculture wastewater circulating treatment system for physicochemical-biological-ecological coupling automatic control optimization learning also comprises a strengthening treatment device and an undercurrent wetland system;
the strengthening treatment equipment is 10 sets of anti-blocking integrated equipment, the technical process is anti-blocking artificial wetland, and the standard scale of the single equipment is 1-2 tons/day;
the subsurface flow wetland system is composed of 2 parallel horizontal subsurface flow wetlands (monomer size: 15m: 10m: 1.2m) and 2 serial horizontal subsurface flow wetlands (monomer size: 30m: 20m: 1.2m);
the aquaculture area comprises a type I aquaculture area, a type II aquaculture area and a type III aquaculture area; the I-type culture area is an aquaculture area with higher requirement on water quality; the II-class culture area and the III-class culture area are sequentially aquaculture areas with low requirements on water quality;
the I-type culture area receives effluent from the subsurface flow wetland system, sequentially flows through the II-type culture area and the III-type culture area, then passes through the electromagnetic three-way valve and the pipeline, and selectively enters the physicochemical treatment unit, the biological-ecological coupling treatment system or the subsurface flow wetland system for treatment according to the automatic monitoring and analysis of the intelligent water quality online monitoring system, and then flows into the I-type culture area to form water flow circulation.
The intelligent water quality on-line monitoring system comprises a water quality monitoring sensing probe, an information transmission early warning module and a data analysis processing control module, and the process route selection of a plurality of water flow channels is realized under the assistance of an electromagnetic three-way valve and a pipeline according to the water quality and water quantity conditions after data are monitored and analyzed in real time.
In the application example, the simulation system only needs part of the process flow to be connected with water treatment and circulation under the condition that the effluent quality requirement of the simulation system is moderate or the early-stage sewage treatment reaches the standard. According to the monitoring and analysis results of the intelligent water quality online monitoring system, the wastewater can be automatically controlled to evenly distribute water to the two groups of biological-ecological coupling treatment systems from the electromagnetic three-way valve and the pipeline, the wastewater flows to the subsurface flow wetland system through the electromagnetic three-way valve and the pipeline after being treated by the strengthening treatment equipment and the subsurface flow wetland system, the wastewater after being deeply treated flows into the I-type culture area, the II-type culture area and the III-type culture area in sequence and then flows into the two groups of physical and chemical treatment units through the electromagnetic three-way valve and the pipeline to realize water circulation.
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention as defined by the appended claims.

Claims (5)

1. A physicochemical-biological-ecological coupling aquaculture wastewater circulating treatment system is characterized by comprising a physicochemical strengthening treatment system, a biological-ecological coupling treatment system, an ecological treatment system and an aquaculture area which are sequentially connected to form a circulating loop, an intelligent water quality online monitoring system and connecting pipelines for connecting the systems and the areas;
the physical and chemical strengthening treatment system comprises a plurality of physical and chemical treatment units, wherein each physical and chemical treatment unit is internally provided with a photocatalytic strengthening material and submerged plants; in each physical and chemical processing unit:
the filling volume ratio of the photocatalytic strengthening material is 20-60%, and the photocatalytic strengthening material is a mesh or honeycomb porous suspension type photocatalytic material;
the submerged plant is one or more of bitter grass, curly pondweed, black alga, watermifoil and eyeweed, and the planting density is 5-20 plants/m 2 ；
The filling volume ratio of the photocatalytic strengthening materials in each physical and chemical treatment unit is increased along the water flow direction in sequence;
the biological-ecological coupling treatment system comprises an ecological pond, an enhanced treatment device and an underflow wetland system which are sequentially connected; the ecological pond comprises submerged plants, an ecological floating island and an aeration system, wherein the submerged plants in the ecological pond are one or a combination of more than one of eel grass, curly pondweed, black algae, watermifoil and gynura bicolor, and the planting density is 5-20 plants/m 2 (ii) a The strengthening treatment equipment comprises equipment capable of implementing one or more combined processes of A/O, SBR, magnetic coagulation and anti-blocking artificial wetland;
the ecological treatment system comprises an underflow wetland system;
an overrunning pipeline is respectively arranged between the water outlet of the aquaculture area and the water inlet of the ecological pond and between the water inlet of the strengthening treatment equipment, and a backflow pipeline is arranged between the water outlet of the subsurface flow wetland system in the biological-ecological coupling treatment system and the water inlet of the aquaculture area;
the aquaculture area is divided into a plurality of sub-areas according to the water quality requirement, wherein the sub-area with the highest water quality requirement is connected with the ecological treatment system and the return pipeline, and the sub-area with the lowest water quality requirement is connected with the physicochemical strengthening treatment system and the surpassing pipeline;
the intelligent water quality online monitoring system monitors the water quality of wastewater at the water outlet of the aquaculture area, regulates and controls the water flow in each connecting pipeline, the surpassing pipeline and the return pipeline according to the set target water quality requirement, and realizes the self-control optimization learning and selection of different water flow channel lines.
2. The aquaculture wastewater recycling treatment system according to claim 1, wherein the ecological floating island is in a fixed suspension type or an intelligent movable suspension type, and the coverage degree is 5% -10%;
the aeration system is one or a combination of several of submerged aeration equipment or solar suspension aeration equipment, and the power is 30W-2 KW.
3. The aquaculture wastewater recycling treatment system of claim 1, wherein the subsurface wetland system is one or a combination of horizontal subsurface flow and vertical subsurface flow with the same or different areas, blocks and shapes.
4. The aquaculture wastewater recycling treatment system of claim 1, wherein the intelligent online water quality monitoring system comprises a water quality monitoring sensing probe, an information transmission early warning module and a data analysis processing control module, and automatically controlled optimization learning and selection of different water channel lines are realized by monitoring water quality conditions in real time, analyzing data and then regulating and controlling water flow in each connecting pipeline, surpassing pipeline and return pipeline.
5. A physical-chemical-biological-ecological coupling automatic control optimization learning aquaculture wastewater recycling treatment process is characterized by comprising the following steps: the aquaculture wastewater circulating treatment system of any one of claims 1 to 4 is used, the intelligent online water quality monitoring system is used for monitoring the wastewater quality of the water outlet of the aquaculture area, and the water flow in each connecting pipeline, the overtaking pipeline and the backflow pipeline is regulated and controlled according to the set target water quality requirement, so that the automatic control optimization learning and selection of different water flow channel lines are realized, and the aquaculture wastewater circulating treatment is completed.
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