Zero-carbon-emission low-temperature-resistant aquaculture tail water treatment system and method

Abstract

The invention relates to the technical field of sewage treatment, in particular to a zero-carbon-emission low-temperature-resistant aquaculture tail water treatment system and method.The system comprises a pond body, a plant module, a filler module and an MB-DSBR module, and the plant module, the filler module and the MB-DSBR module are arranged in the pond body from top to bottom; the MB-DSBR module is located below the filler module, the MB-DSBR module is immersed in the tail water of the pool body and aerates the water body below the filler module, and at least part of the filler module is immersed in the tail water of the pool body, so that the plant module is exposed in the greenhouse environment of the energy-saving sunlight greenhouse module. An aeration unit and an ecological purification unit are integrated, an aeration tank and an ecological purification tank are replaced, the occupied area is remarkably saved, the movable bio-membrane reactor and the oxygen-enriched separation bio-membrane reactor are subjected to near-field coupling, the use density of filler is reduced, and the O2 utilization rate of a traditional movable bio-membrane reactor is increased.

Description

Technical Field

[0001] The present invention relates to the technical field of sewage treatment, and in particular to a zero-carbon emission, low-temperature-resistant aquaculture tailwater treatment system and method. Background Art

[0002] At present, the treatment of urban domestic sewage and industrial sewage has achieved remarkable results, and agricultural non-point sources have become the main factor of water pollution. With the rapid development of aquaculture, in the process of intensive and high-density breeding, a large amount of leftover bait, feces, etc. are discharged into the water, far exceeding the self-purification capacity of the water environment. The problem of aquaculture tail water discharge has become increasingly prominent, threatening the safety of aquatic products, damaging the water ecological environment, and seriously restricting the improvement of regional water environment quality.

[0003] According to the data of China Fisheries Statistical Yearbook, as of 2022, the aquaculture area in China will reach 7,107,500 hectares. According to the data of the Second National Pollution Source Census Bulletin, the main pollutants in aquaculture are organic matter, nitrogen and phosphorus. In 2017, my country's aquaculture industry was distributed in 2,843 districts and counties across the country, with annual emissions of chemical oxygen demand, ammonia nitrogen, total nitrogen and total phosphorus of 666,000 tons, 22,300 tons, 99,100 tons and 16,100 tons, respectively, which were 0.73 times, 0.50 times, 0.64 times and 2.03 times the corresponding pollutant emissions from industrial sources, respectively. Among them, the total phosphorus emission has reached 2 times that of industrial sources. Generally speaking, the pollutants in aquaculture tailwater mainly come from the sewage discharged by aquatic products themselves, the residues of inputs such as aquaculture feed and fishery drugs, microorganisms in aquaculture water bodies, and water from fishery waters, mainly including ammonia nitrogen, nitrite, organic matter, phosphorus and fouling organisms. According to research, only about 20-25% of the protein in feed fed to aquaculture is absorbed for the growth of aquatic products, and the rest is mostly discharged into the water environment in the form of feces and metabolism.

[0004] As a widely used ecological treatment process for pond aquaculture tailwater, "three ponds and two dams" has the advantages of reducing the use of chemical agents, high stability and controllability. However, this model has high requirements for water quality, poor treatment effect for some high-concentration organic wastewater, poor treatment effect at low temperatures in winter, and limited application in the case of high aquaculture density. Secondly, the area of ​​tailwater treatment facilities in this model is not less than 8%-10% of the total aquaculture area, and the actual proportion is mostly 15%, which occupies a large area, has high aeration energy consumption, and generally high operating costs.

[0005] The existing patent CN116813074A discloses a three-tank two-dam aquaculture tailwater treatment process based on MABR enhanced type, including a sedimentation zone, a first filtration zone, a MABR biofilm purification zone, a second filtration zone and an ecological purification zone. The MABR biofilm purification zone can purify most of the COD in the tailwater, while reducing some of the total nitrogen and total phosphorus indicators. The ecological purification zone further reduces the suspended matter and COD in the tailwater. The existing patent CN219239455U discloses an enhanced three-tank two-dam aquaculture tailwater treatment system, including an artificial wetland, a sedimentation tank, an aeration tank, a biological purification tank and a clean water tank connected in sequence; the existing patent CN217103254U discloses a three-tank two-dam aquaculture tailwater ecological treatment system, including an aquatic animal filtration tank, a first transition tank, an aquatic plant filtration tank, a second transition tank, and a mixed filtration tank connected in sequence. However, in the existing technical system, the tailwater treatment facility area accounts for as much as 15% of the "three pools and two dams" model, the aeration energy consumption is high, and the operation requires a high level of technology and management. The operating cost is about 2,000-3,000 yuan per mu, and the treatment efficiency is low in winter and the landscape effect is poor.

[0006] Therefore, there is an urgent need to develop a zero-carbon emission, low-temperature resistant aquaculture effluent treatment system and method to reduce the footprint of purification facilities, reduce costs, and achieve efficient treatment of pollutants in low-temperature aquaculture effluents in winter. Summary of the invention

[0007] In view of the above-mentioned technical problems, the present invention overcomes the shortcomings of the prior art and provides a zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system and method, which integrates aeration and ecological purification units into one, replaces aeration tanks and ecological purification tanks, and significantly saves floor space. The MB-DSBR module adopts "bubble-free + bubble-containing" coupled aeration, near-field coupling of the mobile biofilm reactor and the oxygen-enriched separation biofilm reactor, reduces the use density of fillers, and improves the O2 utilization rate of traditional mobile biofilm reactors.

[0008] In a first aspect, the present invention provides a zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system, comprising a tank body and a plant module, a filler module, and an MB-DSBR module arranged in the tank body from top to bottom, wherein the plant module is located above the filler module and connected to the filler module through a root system, and the MB-DSBR module is located below the filler module, wherein the MB-DSBR module is immersed in the tailwater of the tank body and aerates the water below the filler module, and at least part of the filler module is immersed in the tailwater of the tank body. The aquaculture tailwater treatment system also includes an energy-saving solar greenhouse module wrapped outside the tank body, so that the plant module is exposed to the greenhouse environment of the energy-saving solar greenhouse module. First, the MB-DSBR (membrane bioreactor-dissolved oxygen selective bioreactor) module uses hollow fiber membranes for efficient solid-liquid separation and aerates the tailwater, thereby increasing the oxygen content in the water, facilitating the degradation of organic pollutants by microorganisms, and improving the water purification efficiency. The energy-saving solar greenhouse module provides a suitable growth environment for the plant module, and can maintain the normal growth of the plant module on the filler module even in cold seasons, thereby ensuring the stable operation of the system.

[0009] Furthermore, the MB-DSBR module includes a membrane frame arranged in the cell body and a membrane assembly connected thereto, wherein the membrane assembly includes hollow fiber membranes, and the surface micropore diameter of the hollow fiber membranes is not greater than 1 nm.

[0010] Furthermore, it also includes an air supply module for supplying air to the MB-DSBR module, wherein the air supply module includes a Roots blower and an air intake pipe connected to the output end thereof, and the air intake pipe is connected to the air inlet of the MB-DSBR module.

[0011] Furthermore, the outer layer of the filler module is woven from low-carbon steel wire or PVC-coated steel wire into a mesh body with a containing space, and the interior of the mesh body is filled with soil and matrix fillers. These materials can promote the development of plant roots and provide necessary nutrients. At the same time, the matrix itself can also absorb and decompose harmful substances in the water, thereby realizing the recycling of resources.

[0012] Furthermore, the matrix filler includes one or more of limestone, volcanic rock and ceramsite.

[0013] Furthermore, the energy-saving solar greenhouse module includes a greenhouse body and a photovoltaic power generation module connected thereto.

[0014] Furthermore, the photovoltaic power generation module includes a photovoltaic power generation panel and a controller and a battery connected thereto, and the photovoltaic power generation panel adopts a double-sided double-glass photovoltaic module of polycrystalline silicon or amorphous silicon.

[0015] Furthermore, the plant module includes at least one of landscape plants, emergent plants and floating leaf plants.

[0016] Furthermore, the landscape plants include canna, the emergent plants include at least one of wild rice stem, arrowhead, iris, variegated reed, yellow iris, water lily, and water celery, and the floating leaf plants include at least one of pennywort, water lily, water chestnut, Euryale ferox, and water nymph.

[0017] In the second aspect, the present invention also provides a zero-carbon emission and low-temperature resistant aquaculture tailwater treatment method, using the aquaculture tailwater treatment system described in any one of the first aspects, and also includes discharging the tailwater to be treated into a pool body, so that the tailwater submerges the MB-DSBR module, and at least part of the filler module is submerged in the tailwater of the pool body, using the MB-DSBR module to aerate the water body below the filler module, and allowing the plant module above the filler module to grow in the greenhouse environment of the energy-saving solar greenhouse module.

[0018] The beneficial effects of the present invention are: (1) The zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system provided by the present invention integrates the aeration and ecological purification units in the "three pools and two dams" into one, replacing the aeration pool and the ecological purification pool, significantly saving floor space. The MB-DSBR module adopts "bubble-free + bubble-containing" coupled aeration, near-field coupling of the mobile biofilm reactor and the oxygen-enriched separation biofilm reactor, reducing the density of filler use, improving the O2 utilization rate of the traditional mobile biofilm reactor, reducing energy consumption, and reducing operating costs; (2) The present invention utilizes hollow fiber membranes for efficient solid-liquid separation and performs aeration treatment on tail water, thereby increasing the oxygen content in the water, which is beneficial for microbial degradation of organic pollutants and improving water purification efficiency. At the same time, a photovoltaic greenhouse structure is used to enhance the thermal insulation effect, which is beneficial for the growth of plant modules on the filler modules, thereby improving winter treatment efficiency and achieving deep and efficient treatment of aquaculture tail water pollutants. At the same time, biological conditioning bacteria are placed around the MB-DSBR module to achieve rapid start-up of the system. (3) The components inside the system of the present invention have reasonable structures and are easy to install and maintain, with low investment costs. They can be adjusted and optimized according to the specific breeding status and water quality conditions. They have strong applicability, improve landscape effects, implement the concept of park city, enhance public acceptance, and reduce buffer zones and impact ranges. At the same time, photovoltaic power generation is used to reduce system energy consumption and operating costs, integrating low carbon, environmental protection, energy saving, and technology to achieve zero carbon emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a structural schematic diagram of a zero-carbon emission, low-temperature resistant aquaculture tailwater treatment system in an embodiment of the present invention; In the figure: 01, energy-saving solar greenhouse module; 02, plant module; 03, MB-DSBR module; 031, membrane frame; 032, membrane assembly; 033, biological conditioning agent; 04, filler module; 05, air supply module; 051, Roots blower; 052, pressure gauge; 053, air intake valve; 054, air intake pipe; 06, reflux module; 061, pump; 062, reflux pipe; 07, photovoltaic power generation module; 08, intelligent monitoring module. DETAILED DESCRIPTION

[0020] like Figure 1 As shown in the figure, a zero-carbon emission, low-temperature resistant aquaculture tailwater treatment system is applied to a large-scale aquaculture pond in Huai'an, Jiangsu Province with an area of ​​5,280 mu and a water treatment volume of 500m 3 / d, after the front-end sedimentation pretreatment, the tail water quality is COD 500-600mg / L, ammonia nitrogen 30-40mg / L, total nitrogen 40-50mg / L, total phosphorus 1-2mg / L, permanganate index 40-50mg / L, and the following technical solutions are adopted: It includes an energy-saving solar greenhouse module 01, a plant module 02, an MB-DSBR module 03, a filler module 04, an air supply module 05, a reflux module 06, a photovoltaic power generation module 07, an intelligent monitoring module 08, etc.; the energy-saving solar greenhouse module 01 is placed on the outside of the system to play a good insulation role; the plant module 02 is located on the upper part of the MB-DSBR module 03 and is connected to the filler module 04 through the root system; the photovoltaic power generation module 07 is installed on the top of the energy-saving solar greenhouse module 01; the MB-DSBR module 03 is fixed underwater; the air supply module 05, the reflux module 06, the intelligent monitoring module 08, etc. are electrically connected to the photovoltaic power generation module 07.

[0021] The energy-saving solar greenhouse module 01 adopts double-sided double-glass photovoltaic modules and glass packaging on the back, which can quickly increase the temperature, reduce heat loss, and prevent freezing and heat preservation. Specifically, it can adopt a full steel frame without column support and hot-dip galvanized pipe horizontal welding and fixation to improve the wind and snow bearing capacity and lighting effect, avoid the reduction of biological activity due to low temperature in winter, and solve the problems of unstable purification and water quality deterioration.

[0022] Plant module 02 includes aquatic plants such as landscape plants, emergent plants, and floating-leaf plants, which are connected to filler module 04 and MB-DSBR module 03 through root systems; landscape plants include canna, etc.; emergent plants include wild rice stem, arrowhead, iris, variegated reed, yellow iris, water lily, water chestnut, water celery, etc.; floating-leaf plants include pennywort, water lily, water chestnut, water caltrop, water chestnut, water hyacinth, etc.

[0023] MB-DSBR module 03 includes a membrane frame 031, a membrane assembly 032 and a biological conditioning agent 033. MB-DSBR module 03 adopts "bubble-free + bubble-containing" coupled aeration to couple the mobile biofilm reactor with the oxygen-enriched separation biofilm reactor in the near field, reduce the density of filler use, improve the O2 utilization rate of the traditional mobile biofilm reactor, reduce energy consumption, and reduce operating costs. The membrane frame 031 can be a three-dimensional hollow structure, and the membrane frame 031 is fixed by the upper four-corner fixing ring; the membrane assembly 032 is composed of multiple groups of dense hollow fiber membrane filaments, and the micropore diameter of the membrane filament surface is not greater than 1nm. MB-DSBR module 03 is provided with an air inlet and an air outlet. The biological conditioning agent 033 is mainly composed of photosynthetic bacteria, lactic acid bacteria, yeast and actinomycetes; the air inlet and the air outlet are connected to the air supply module 05 through the air inlet pipe 054 and the exhaust pipe in turn.

[0024] The filler module 04 is made of low-carbon steel wire or PVC-coated steel wire through mechanical weaving, and is filled with soil and matrix filler inside; the matrix filler is limestone, volcanic rock, expanded clay, etc., and the filler module 04 has an adsorption effect on pollutants in the aquaculture tail water flowing through; the upper part of the filler module 04 is planted with landscape and aquatic plants with good treatment performance, strong adaptability, beautiful appearance and ornamental value.

[0025] The air supply module 05 includes a Roots blower 051, a pressure gauge 052, an air intake valve 053, and an air intake pipe 054. The output end of the Roots blower 051 is connected to the air intake pipe 054, and the air is supplied to the MB-DSBR module 03 through the air intake valve 053, the pressure gauge 052, etc. It should be noted that the air supply module 05 adopts a regular emptying method to ensure a high gas transmission efficiency.

[0026] The reflow module 06 includes a pump 061 and a reflow pipe 062. The treated aquaculture tail water is returned to the system through the reflow pipe 062 under the action of the pump 061. The system processing efficiency is adjusted by controlling the tail water reflow ratio under different water quality conditions; the power of the pump 061 is determined according to the system scale.

[0027] Photovoltaic power generation module 07 includes photovoltaic power generation panels, controllers and batteries. Photovoltaic power generation panels use polycrystalline silicon or amorphous silicon, light-transmitting double-sided double-glass photovoltaic modules, which do not occupy the aquaculture water surface, do not affect production and save land. While ensuring the growth of plants in the system, they provide energy to drive the system. The battery can use lead-acid maintenance-free batteries and colloidal batteries to store the electricity generated by the photovoltaic modules.

[0028] The intelligent monitoring module 08 is connected to the MB-DSBR module 03 and the photovoltaic power generation module 07 through pipelines, including DO and pH value real-time monitoring components, making full use of renewable energy to monitor the operating status of the system in real time.

[0029] The zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system of this embodiment discharges the tailwater to be treated into the pool body during tailwater treatment, so that the tailwater immerses the MB-DSBR module 03, and at least part of the filler module 04 is immersed in the tailwater of the pool body, and the MB-DSBR module 03 is used to aerate the water body below the filler module 04, and the plant module 02 above the filler module 04 is located in the greenhouse environment of the energy-saving solar greenhouse module 01 for growth, and at the same time, the biological conditioning agent 033 is added to the water body around the membrane frame 031 and the membrane assembly 032 to accelerate the start-up of the system. The biological conditioning agent 033 contains a variety of microorganisms, which multiply and grow geometrically in the water, and play a purification role for different pollution factor attributes at the same time; the plant module 02 provides a huge surface area and attachment site for the microbial population to reproduce and form a stable fixed microbial film; the MB-DSBR module 03 can reduce the density of filler use, improve the O2 utilization rate, and thus improve the treatment efficiency.

[0030] It can be understood that the MB-DSBR module 03, as the core power unit of the system, has the main function of aerating the water body below the filler module 04, dissolving oxygen into the water, providing sufficient dissolved oxygen for the activities of aerobic microorganisms, and promoting the oxidation and decomposition of organic matter. At the same time, the water flow disturbance generated by aeration helps to mix the water body, so that pollutants and microorganisms are fully in contact, and the purification efficiency is improved. The efficient aeration capacity of the MB-DSBR module 03 makes it unnecessary to fill the filler module 04 with a large amount of fillers like traditional biofilters, thereby reducing the density of fillers and saving costs; the filler module 04, as a carrier of microorganisms, provides a huge surface area for the attachment and growth of microorganisms. Under the action of aeration and water flow, the microorganisms in the tail water gradually form a biofilm on the surface of the filler. There are various types of microorganisms in the biofilm, including aerobic bacteria, anaerobic bacteria and facultative bacteria, etc. They work together to decompose various pollutants in the tail water; the plant module 02 located in the energy-saving solar greenhouse module 01 has its roots immersed in the water above the filler module 04. The roots of the plant module 02 can absorb nutrients such as nitrogen and phosphorus in the water, further reducing the concentration of pollutants in the tail water. The plant roots can also serve as a place for microorganisms to attach, expand the activity area of ​​microorganisms, and promote the formation of biofilms. The plant module 02 absorbs carbon dioxide and releases oxygen through photosynthesis, which helps to improve the air quality in the energy-saving solar greenhouse module 01; the added biological conditioning agent 033 can quickly reproduce in the water, form a dominant bacterial community, accelerate the formation of biofilms, and increase the startup speed of the system. The microorganisms in these agents can target different pollution factors and play a purification role at the same time.

[0031] In addition, the MB-DSBR module 03 in the aquaculture tailwater treatment system of the present invention provides oxygen and water flow, which promotes the growth and activity of the biofilm on the filler module 04, and the filler module 04 provides a place for microorganisms to attach. The two complement each other to improve the efficiency of biological purification; the filler module 04 provides support and nutrition for the root system of the plant module 02, and the plant module 02 absorbs the remaining nutrients after treatment by the filler module 04 and provides more attachment places for microorganisms. The two work synergistically to further reduce the concentration of pollutants in the water body. The MB-DSBR module 03, the filler module 04 and the plant module 02 work together to construct an efficient and stable ecological purification system, which realizes the deep treatment of aquaculture tailwater, reduces energy consumption, and achieves zero carbon emissions.

[0032] The zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system constructed by the present invention can meet the secondary standard of aquaculture tailwater in freshwater receiving waters in the "Pond Aquaculture Tailwater Discharge Standard" (DB32 / 4043-2021). The total installed capacity of the photovoltaic power generation module is 100kW, the annual power generation hours are 1100h, the effective sunshine hours in northern Jiangsu are 6h / day, and the performance ratio is 0.75. After calculation, the annual power generation of the photovoltaic power generation module of this system is about 500,000 kWh; the energy consumption unit (Roots blower, pump, smart monitoring module, etc.) consumes about 140,000 kWh of electricity per year, and the battery stores additional electricity to power the system when the sunshine is insufficient, at night, and in emergency situations, achieving zero energy consumption and zero carbon emissions, and promoting the green and high-quality development of the aquaculture industry.

[0033] As another embodiment of the present invention, a zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system is applied to a large-scale aquaculture pond in Changzhou, Jiangsu Province with an area of ​​3,260 mu and a water treatment capacity of 300m 3 / d, after the front-end sedimentation pretreatment, the tail water quality is COD 300-400mg / L, ammonia nitrogen 20-30mg / L, total nitrogen 40-50mg / L, total phosphorus 1-2mg / L, permanganate index 50-60mg / L, and the following technical solutions are adopted: It includes an energy-saving solar greenhouse module 01, a plant module 02, an MB-DSBR module 03, a filler module 04, an air supply module 05, a reflux module 06, a photovoltaic power generation module 07, an intelligent monitoring module 08, etc.; the energy-saving solar greenhouse module 01 is placed on the outside of the system to play a good insulation role; the plant module 02 is located on the upper part of the MB-DSBR module 03 and is connected to the filler module 04 through the root system; the photovoltaic power generation module 07 is installed on the top of the energy-saving solar greenhouse module 01; the MB-DSBR module 03 is fixed underwater; the air supply module 05, the reflux module 06, the intelligent monitoring module 08, etc. are electrically connected to the photovoltaic power generation module 07.

[0034] The energy-saving solar greenhouse module 01 adopts double-sided double-glass photovoltaic modules and glass packaging on the back, which can quickly increase the temperature, reduce heat loss, and prevent freezing and heat preservation. It adopts a full steel frame without column support and hot-dip galvanized pipes for horizontal welding and fixing to improve the wind and snow bearing capacity and lighting effect, and avoid the problems of reduced biological activity, unstable purification and deterioration of water quality caused by low temperatures in winter.

[0035] Plant module 02 includes aquatic plants such as landscape plants, emergent plants, and floating leaf plants, which are connected to filler module 04 through root systems; landscape plants include canna, etc.; emergent plants include wild rice stem, arrowhead, iris, variegated reed, yellow iris, water lily, water chestnut, water celery, etc.; floating leaf plants include pennywort, water lily, water chestnut, water gorge, water chestnut, etc.

[0036] MB-DSBR module 03 includes membrane frame 031, membrane assembly 032 and biological conditioning agent 033. MB-DSBR module 03 adopts "bubble-free + bubble-containing" coupled aeration to couple the mobile biofilm reactor with the oxygen-enriched separation biofilm reactor in the near field, reduce the density of filler, improve the O2 utilization rate of the traditional mobile biofilm reactor, reduce energy consumption, and reduce operating costs. The membrane frame 031 is a three-dimensional hollow structure, and the membrane frame 031 is fixed by the upper four-corner fixing ring; the membrane assembly 032 is composed of multiple groups of dense hollow fiber membrane filaments, and the micropore diameter of the membrane surface is not more than 1nm. MB-DSBR module 03 is provided with an air inlet and an air outlet. The biological conditioning agent 033 is mainly photosynthetic bacteria, lactic acid bacteria, yeast and actinomycetes; the air inlet and the air outlet are connected to the air supply module 05 through the air inlet pipe 054 and the exhaust pipe in turn.

[0037] The filler module 04 is made of low-carbon steel wire or PVC-coated steel wire through mechanical weaving, and is filled with soil and matrix filler inside; the matrix filler is limestone, volcanic rock, expanded clay, etc., and the filler module 04 has an adsorption effect on pollutants in the aquaculture tail water flowing through; the upper part of the filler module 04 is planted with landscape and aquatic plants with good treatment performance, strong adaptability, beautiful appearance and ornamental value.

[0038] The air supply module 05 includes a Roots blower 051, a pressure gauge 052, an air intake valve 053, and an air intake pipe 054. The output end of the Roots blower 051 is connected to the air intake pipe 054, and the air is supplied to the MB-DSBR module 03 through the air intake valve 053, the pressure gauge 052, etc. It should be noted that the air supply module 05 is emptied regularly to ensure a high gas transmission efficiency.

[0039] The reflow module 06 includes a pump 061 and a reflow pipe 062. The treated aquaculture tail water is returned to the system through the reflow pipe 062 under the action of the pump 061. The system processing efficiency is adjusted by controlling the tail water reflow ratio under different water quality conditions; the power of the pump 061 is determined according to the system scale.

[0040] Photovoltaic power generation module 07 includes photovoltaic power generation panels, controllers and batteries. Photovoltaic power generation panels use polycrystalline silicon or amorphous silicon, light-transmitting double-sided double-glass photovoltaic modules, which do not occupy the aquaculture water surface, do not affect production and save land. While ensuring the growth of plants in the system, it provides energy to drive the system. The battery uses lead-acid maintenance-free batteries and colloidal batteries to store the electricity generated by the photovoltaic modules.

[0041] The intelligent monitoring module 08 is connected to the MB-DSBR module 03 and the photovoltaic power generation module 07 through pipelines, including DO and pH value real-time monitoring components, making full use of renewable energy to monitor the operating status of the system in real time.

[0042] The zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system constructed by the present invention can meet the secondary standard of aquaculture tailwater in freshwater receiving waters in the "Pond Aquaculture Tailwater Discharge Standard" (DB32 / 4043-2021). The total installed capacity of the photovoltaic power generation module is 100kW, the annual power generation hours are 1075h, the effective sunshine hours in northern Jiangsu are 6h / day, and the performance ratio is 0.75. After calculation, the annual power generation of the photovoltaic power generation module of this system is about 480,000 kWh; the energy consumption unit (Roots blower, pump, smart monitoring module, etc.) consumes about 140,000 kWh of electricity per year, and the battery stores additional electricity to power the system when the sunshine is insufficient, at night, and in emergency situations, achieving zero energy consumption and zero carbon emissions, and promoting the green and high-quality development of the aquaculture industry.

[0043] In addition to the above embodiments, the present invention may also have other implementation modes. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the present invention.

Claims

1. A zero-carbon emission and low-temperature resistant aquaculture tailwater treatment system, characterized in that: The invention comprises a pond body and a plant module (02), a filler module (04), and an MB-DSBR module (03) arranged in the pond body from top to bottom, wherein the plant module (02) is located above the filler module (04) and connected thereto via a root system, and the MB-DSBR module (03) is located below the filler module (04), wherein the MB-DSBR module (03) is immersed in the tail water of the pond body and aerates the water below the filler module (04), and at least part of the filler module (04) is immersed in the tail water of the pond body. The aquaculture tail water treatment system further comprises an energy-saving solar greenhouse module (01) wrapped and arranged outside the pond body, so that the plant module (02) is exposed to the greenhouse environment of the energy-saving solar greenhouse module (01).

2. The aquaculture tailwater treatment system according to claim 1, characterized in that: The MB-DSBR module (03) comprises a membrane frame (031) arranged in a cell body and a membrane assembly (032) connected thereto, wherein the membrane assembly (032) comprises hollow fiber membranes, and the surface micropore diameter of the hollow fiber membranes is not greater than 1 nm.

3. The aquaculture tailwater treatment system according to claim 2, characterized in that: Also included is an air supply module (05) for supplying air to the MB-DSBR module (03), wherein the air supply module (05) comprises a Roots blower (051) and an air intake pipe (054) connected to the output end thereof, and the air intake pipe (054) is connected to the air intake port of the MB-DSBR module (03).

4. The aquaculture tailwater treatment system according to claim 1, characterized in that: The outer layer of the filler module (04) is woven from low-carbon steel wires or PVC-coated steel wires into a mesh body with a containing space, and the interior of the mesh body is filled with soil and matrix fillers.

5. The aquaculture tailwater treatment system according to claim 4, characterized in that: The matrix filler includes one or more of limestone, volcanic rock and ceramsite.

6. The aquaculture tailwater treatment system according to claim 1, characterized in that: The energy-saving solar greenhouse module (01) comprises a greenhouse body and a photovoltaic power generation module (07) connected thereto.

7. The aquaculture tailwater treatment system according to claim 6, characterized in that: The photovoltaic power generation module (07) comprises a photovoltaic power generation panel and a controller and a storage battery connected thereto, wherein the photovoltaic power generation panel adopts a double-sided double-glass photovoltaic module of polycrystalline silicon or amorphous silicon.

8. The aquaculture tailwater treatment system according to claim 1, characterized in that: The plant module (02) comprises at least one of landscape plants, emergent plants and floating leaf plants.

9. The aquaculture tailwater treatment system according to claim 8, characterized in that: The landscape plants include canna, the emergent plants include at least one of wild rice stem, arrowhead, iris, variegated reed, yellow iris, water lily, and water celery, and the floating leaf plants include at least one of pennywort, water lily, water chestnut, Euryale ferox, and water nymph.

10. A zero-carbon emission and low-temperature resistant aquaculture tailwater treatment method, characterized in that: The aquaculture tailwater treatment system according to any one of claims 1 to 9 further includes discharging the tailwater to be treated into a pond body, so that the tailwater submerges the MB-DSBR module (03), and at least a portion of the filler module (04) is submerged in the tailwater of the pond body, using the MB-DSBR module (03) to aerate the water body below the filler module (04), and allowing the plant module (02) above the filler module (04) to grow in the greenhouse environment of the energy-saving solar greenhouse module (01).

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