Water quality purification device for algal-bacterial symbiotic pond

Abstract

A water inlet of a water collecting tank is connected with a pond water source, a water outlet of the water collecting tank is communicated with a water inlet of a water storage tank through a transparent pipe, outlet water of the water storage tank enters the pond, the water collecting tank is connected with an automatic dosing system, and trace element concentration sensors are arranged in the water collecting tank and the transparent pipe. And the automatic dosing system and the trace element concentration sensor are connected with the controller. Water in a pond is pumped into a water collecting tank, beneficial bacteria and algae are added through an automatic dosing system, the concentration of microelements in the water is detected through a microelement concentration sensor in the water collecting tank, missing elements are supplemented in time, the water in the pond enters a water storage tank through a transparent pipe, and the beneficial bacteria and the algae grow in the transparent pipe and massively propagate; massively propagated bacteria and algae enter the water body of the pond from the water storage tank, so that dominant populations can be more favorably formed in the pond, and the effect of purifying the water quality is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water purification, and in particular relates to a water purification device for a bacteria-algae symbiotic pond. Background Art

[0002] With the increase in pond aquaculture output and the rapid expansion of high-yield and high-density aquaculture, a large amount of exogenous feed input is bound to be required in order to increase the output of aquatic products. However, only a small part of the nutrients are converted into fish tissues, and most of the feed enters the external environment as residual bait. The decay and decomposition of residual bait and excrement produce a large amount of harmful substances, which leads to water quality deterioration and seriously hinders the sustainable development of aquaculture. In aquaculture, the absorption rate of total phosphorus (TN) and total nitrogen (TP) by fish is about 25% and 30% respectively. The absorption rate of TN and TP in shrimp farming is 25% and 10% respectively, and the rest enters the aquaculture water body, causing the deterioration of the aquaculture water body. In order to ensure the freshness of the aquaculture water body, it is necessary to pump out a large amount of pond water and inject fresh water. The discharge of aquaculture pond water outside the body will cause eutrophication of the water body at the discharge site. The main pollutants discharged by aquaculture are chemical oxygen demand (COD), ammonium nitrogen (NH4 + −N), TP and TN, accounting for 23.7%, 41.6%, 55.6% and 22.1% of the total agricultural pollutants respectively, and are the main factors causing pollution.

[0003] With the introduction of the emission standards for aquaculture tailwater pollutants, the comprehensive management and ecological restoration of pond aquaculture water will become one of the important contents of the daily management of the aquaculture industry. The research and development of in-situ and ex-situ purification and restoration technologies for aquaculture water nutrients will become an important industrial and technical demand of the aquaculture industry.

[0004] At present, the technologies for aquaculture water treatment mainly include physical treatment technology, chemical treatment technology and biological treatment technology. Physical treatment technology refers to the use of mechanical devices and equipment to remove suspended matter and some organic matter in water, reduce the oxygen demand in water, and thus achieve the purpose of purifying sewage. There are mainly mechanical filtration, foam separation, adsorption, extraction and stripping treatment. Chemical treatment technology mainly decomposes and removes pollutants in sewage by chemical reactions, thereby achieving the purpose of purifying sewage. In aquaculture water treatment, the aquaculture water body is large, and the physical and chemical methods have disadvantages such as high cost, poor removal effect, and easy secondary pollution during the purification process, and their application is greatly limited. The biological method shows advantages such as high efficiency, environmental protection, and economy in the treatment of aquaculture water, which can supplement the deficiencies of physical and chemical methods in the treatment of purified water to a certain extent. Among them, the symbiotic technology of bacteria and algae is currently widely concerned. Compared with traditional biological sewage treatment methods, this method has more advantages in pollutant removal capacity and low energy consumption, and has therefore become the focus of research on aquaculture water treatment.

[0005] The algae-bacteria symbiotic system is a combination of algae and fungi to purify sewage. Algae plants use CO2 in water through photosynthesis. 2 and NH4 + ,PO 4 3- etc., synthesizes its own cell substances and releases O 2 Aerobic bacteria use O 2 Decompose and transform organic pollutants to produce CO 2 and the above-mentioned nutrients to maintain the growth and reproduction of algae, and this cycle is repeated to achieve the biological purification of the pool water.

[0006] When the external conditions are constant, the growth of beneficial bacteria and algae in the pond depends on the content and proportion of organic matter, nitrogen, phosphorus and potassium in the pond. After a large number of tests, it was found that the nitrogen and phosphorus content in the breeding pond was high, the potassium content was low and the proportion structure was unbalanced, and the barrel effect was fully reflected, resulting in low utilization efficiency of other substances and insignificant water purification effect. The detection device was used to detect and analyze nitrogen, phosphorus and potassium in the water, and the missing ions were added to make up for the shortcomings, so that the dominant population could not be formed in the pond, and the harmful substances in the pond were further fully utilized. Summary of the invention

[0007] In view of the above-mentioned problems and defects in the prior art, the utility model provides a water purification device for a bacteria-algae symbiotic pond.

[0008] The purpose of the utility model is achieved in the following ways:

[0009] A water purification device for a bacteria-algae symbiotic pond comprises a water collecting tank, a transparent tube, a water storage tank, an automatic dosing system and a controller, wherein the water inlet of the water collecting tank is connected to a pond water source, the water outlet of the water collecting tank is connected to the water inlet of the water storage tank through a transparent tube, the water outlet of the water storage tank enters the pond, the water collecting tank is connected to the automatic dosing system, nitrogen, phosphorus and potassium concentration sensors are arranged in the water collecting tank and the transparent tube, and the automatic dosing system and the nitrogen, phosphorus and potassium concentration sensors are connected to the controller.

[0010] An air flotation machine is installed between the water storage tank and the pond. The microalgae scraped out by the air flotation machine scraper flows back to the water collection tank, and the water after passing through the air flotation machine returns to the pond for recycling.

[0011] At least one LED fill light is arranged in the transparent tube, and the LED fill light is connected to the controller.

[0012] Support frames are arranged at intervals below the transparent tube.

[0013] Drain valves are arranged at intervals at the bottom of the transparent tube.

[0014] The automatic dosing system includes an algae seed adding mechanism, a bacteria seed adding mechanism and a nitrogen, phosphorus and potassium adding mechanism.

[0015] Online monitoring probes are installed in transparent tubes and water storage tanks.

[0016] The algae species are Chlorella and / or Scenedesmus; the bacterial species are at least one of Bacillus, nitrifying bacteria, denitrifying bacteria, and soil bacteria in ponds.

[0017] Compared with the prior art, the utility model pumps the water of the pond into the water collection tank, adds beneficial bacteria and algae through the automatic dosing system, uses the nitrogen, phosphorus and potassium concentration sensor 8 set in the water collection tank to detect the concentration of nitrogen, phosphorus and potassium in the water, and replenishes the missing elements in time. The water of the pond enters the water storage tank through the transparent tube, and the beneficial bacteria and algae grow and multiply in the transparent tube. At night or when the light is insufficient, the LED fill light is used to enhance photosynthesis and promote the growth and expansion of algae. The large-scale reproduction of bacteria and algae enters the pond water from the water storage tank, which is more conducive to the formation of dominant populations in the pond, thereby playing a role in purifying water quality. The purification device improves the situation where the algae and bacteria are directly sprinkled into the pond water body for expansion and reproduction, which has a poor effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram showing the structure of the utility model. DETAILED DESCRIPTION

[0019] like Figure 1 As shown, a water purification device for a bacteria-algae symbiotic pond includes a water collecting tank 2, a transparent tube 3, a water storage tank 4, an automatic dosing system 6 and a controller 7. The water inlet of the water collecting tank 2 is connected to the pond water source, the water outlet of the water collecting tank 2 is connected to the water inlet of the water storage tank 4 through the transparent tube 3, the water outlet of the water storage tank 4 enters the pond, the water collecting tank 2 is connected to the automatic dosing system 6, nitrogen, phosphorus and potassium concentration sensors 8 are arranged in the water collecting tank 2 and the transparent tube 3, and the automatic dosing system 6 and the nitrogen, phosphorus and potassium concentration sensors 8 are connected to the controller 7.

[0020] The water of the pond is pumped into the water collecting tank 2, and beneficial bacteria and algae are added into the water collecting tank 2 through the automatic dosing system 6. The concentration of nitrogen, phosphorus and potassium in the water is detected by the nitrogen, phosphorus and potassium concentration sensor 8 arranged in the water collecting tank 2 and the transparent tube 3, and the missing elements are supplemented in time; the water of the pond enters the water storage tank 4 through the transparent tube 3, and the beneficial bacteria and algae can fully utilize the organic matter in the reactor and the nitrogen, phosphorus and potassium in the water to grow and multiply in large quantities in the transparent tube 3. The multiplied beneficial bacteria and algae enter the pond water from the water storage tank 4, which is more conducive to forming a dominant population in the pond, thereby playing a role in purifying the water quality.

[0021] In a further preferred embodiment, an air flotation machine 5 is arranged between the water storage tank 4 and the pond, and the microalgae scraped by the scraper of the air flotation machine 5 flows back to the water collection tank 2, and the water body through the air flotation machine 5 returns to the pond for recycling. The microalgae in the water body are brought to the surface of the water body of the air flotation machine by the microbubbles rising in the air flotation machine, and are scraped out by the scraper arranged on the surface of the water body of the air flotation machine 5. The scraped microalgae flow back to the water collection tank 2, and then enter the transparent tube 3 again, and the water body after passing through the air flotation machine returns to the pond for recycling.

[0022] Microalgae is not a taxonomic term but refers to a group of tiny algae that can only be identified under a microscope. Microalgae usually refers to a general term for microorganisms that contain chlorophyll a and can perform photosynthesis, and are a type of protists. Nowadays, sewage treatment methods mostly rely on the activities of microorganisms, and the four nutrients after treatment meet the national emission standards. Microalgae growth removes nitrogen and phosphorus, difficult-to-degrade organic matter, and heavy metal ions such as Co, Mn, and Hg. Microalgae can also absorb a certain concentration of NOx, SOx, H 2 S. Norway and Japan have already begun research on cultivating microalgae for environmental protection.

[0023] Air flotation machine is a water treatment equipment that produces a large number of fine bubbles in the water by the dissolved air system, so that the air is attached to the suspended particles in the form of highly dispersed tiny bubbles, resulting in a state with a density less than that of water. The buoyancy principle is used to make it float on the water surface, thereby achieving solid-liquid separation. Air flotation machines are divided into super-efficient shallow air flotation machines, vortex air flotation machines, and horizontal air flotation machines. They are used in water supply, industrial wastewater and urban sewage treatment. The advantages of air flotation machines are that it is a solid-liquid separation equipment with low investment, extremely small floor space, high degree of automation, and convenient operation and management.

[0024] Further, at least one LED fill light 9 is arranged in the transparent tube 3, and the LED fill light 9 is connected to the controller 7. At night or when the light is insufficient, the controller 7 controls the switch of the LED fill light 9, and utilizes the LED fill light 9 to enhance photosynthesis and promote the proliferation and growth of algae and fungi.

[0025] The transparent tube 3 is preferably a large-caliber plastic tube, with a diameter generally between 20 and 80 cm. A tubular plastic bag can also be used to make the tube 3 tortuous. The length can be maintained at 10 to several thousand meters, and the length of the water flow is increased to extend the reaction time. Further, a support frame 10 is provided below the transparent tube 3 every 200 to 300 cm, which can slow down the water flow and facilitate the precipitation of dirt. Further, a drain valve 11 is provided at intervals at the bottom of the transparent tube 3, and the drain valve 11 is provided at the lowest point of the transparent tube. When a certain amount of dirt accumulates, the drain valve is opened to discharge the dirt.

[0026] The automatic dosing system 6 includes an algae seed adding mechanism, a bacterial seed adding mechanism and a nitrogen, phosphorus and potassium adding mechanism. The algae seed adding mechanism, the bacterial seed adding mechanism or the nitrogen, phosphorus and potassium adding mechanism includes a corresponding liquid storage tank 61, a liquid delivery pipeline and a dosing pump 63.

[0027] The beneficial algae species are preferably Chlorella and / or Scenedesmus; the bacterial species are preferably at least one of Bacillus, nitrifying bacteria, denitrifying bacteria, and soil bacteria in ponds.

[0028] Working principle and process flow:

[0029] First, the water pump 1 is used to pump the pond water into the water collection tank 2, and a certain amount of beneficial algae species, such as Chlorella, Scenedesmus, and beneficial bacteria species, such as Bacillus, nitrifying bacteria, and denitrifying bacteria, are added to the water collection tank 2 through the algae species adding mechanism and the bacterial species adding mechanism of the automatic dosing system 6. After the bacterial species and algae species are added, the pond water in the water collection tank 2 flows into the transparent tube 3 by gravity. The transparent tube 3 is provided with an LED fill light 9 to illuminate the algae and bacteria in the water in the transparent tube 3 at night or when the light is insufficient. The beneficial algae and beneficial bacteria after propagation flow into the water storage tank 4 together with the water, and flow into the air flotation machine by gravity. The microalgae in the water body are brought to the surface of the water body of the air flotation machine by the microbubbles rising in the air flotation machine, and are scraped out by the scraper arranged on the surface of the water body of the air flotation machine. The scraped microalgae flow back to the water collection tank 2, and then enter the large-diameter transparent tube 3 again, and return to the pond for recycling after passing through the water body after the air flotation machine.

[0030] Beneficial algae and bacteria in the water collecting tank 2 and the transparent tube 3 consume nitrogen, phosphorus and potassium in the water collecting tank 2 as they expand and grow. As the beneficial algae and bacteria grow, the nitrogen, phosphorus and potassium in the water collecting tank 2 and the transparent tube 3 gradually decrease. The nitrogen, phosphorus and potassium concentration sensor 8 in the water collecting tank 2 and the transparent tube 3 detects the content of nitrogen, phosphorus and potassium in the water in real time, and transmits the detection data to the controller 7. According to the set concentration or proportional relationship, the controller 7 controls the dosing pump of the automatic dosing system 6 to start adding the missing elements, thereby achieving the optimal growth state of algae and fungi.

[0031] The transparent tube 2 and the water storage tank 4 are both equipped with online monitoring probes 12, which can detect water quality indicators after the reaction, such as ammonia nitrogen, nitrite, pH, etc. The detection data is transmitted to the controller 7, and the controller 7 controls the water flow and flow rate flowing into the reactor, as well as the irradiation time of the LED fill light 9, so as to achieve the purpose of purifying water quality and the intelligence of the equipment.

[0032] The device can provide a good environment for the growth of beneficial algae and bacteria. At the same time, these bacteria and algae and supplemented ions return to the pond, which is conducive to the formation of a large number of dominant populations in the pond, thereby purifying the water quality and providing a new method and process for tailwater treatment. The purification device improves the situation where the algae and bacteria are directly spread into the pond water body for expansion and propagation, which has a poor effect.

[0033] The above is only a preferred embodiment of the present invention. It should be pointed out that, for those skilled in the art, several changes and improvements can be made without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A water purification device for a bacteria-algae symbiotic pond, characterized in that: The invention comprises a water collecting tank (2), a transparent tube (3), a water storage tank (4), an automatic dosing system (6) and a controller (7). The water inlet of the water collecting tank (2) is connected to a pond water source. The water outlet of the water collecting tank (2) is connected to the water inlet of the water storage tank (4) through the transparent tube (3). The water outlet of the water storage tank (4) enters the pond. The water collecting tank (2) is connected to the automatic dosing system (6). A nitrogen, phosphorus and potassium concentration sensor (8) is arranged in the water collecting tank (2) and the transparent tube (3). The automatic dosing system (6) and the nitrogen, phosphorus and potassium concentration sensor (8) are connected to the controller (7).

2. The water purification device for a bacteria-algae symbiotic pond according to claim 1, characterized in that: An air flotation machine (5) is arranged between the water storage tank (4) and the pond, and the microalgae scraped out by the air flotation machine scraper flows back into the water collection tank (2), and the water after passing through the air flotation machine returns to the pond for recycling.

3. The water purification device for the bacteria-algae symbiotic pond according to claim 1, characterized in that: At least one LED fill light (9) is arranged in the transparent tube (3), and the LED fill light (9) is connected to the controller (7).

4. The water purification device for the bacteria-algae symbiotic pond according to claim 1, characterized in that: A support frame (10) is arranged at intervals below the transparent tube (3).

5. The water purification device for the bacteria-algae symbiotic pond according to claim 3, characterized in that: A drain valve (11) is arranged at intervals at the bottom of the transparent tube (3).

6. The water purification device for bacteria-algae symbiotic pond according to claim 1, characterized in that: The automatic dosing system (6) includes an algae seed adding mechanism, a bacterial seed adding mechanism and a nitrogen, phosphorus and potassium adding mechanism.

7. The water purification device for bacteria-algae symbiotic pond according to claim 1, characterized in that: Online monitoring probes (12) are arranged in both the transparent tube (3) and the water storage tank (4).

8. The water purification device for the bacteria-algae symbiotic pond according to claim 6, characterized in that: The algae species are Chlorella and / or Scenedesmus; the bacterial species are at least one of Bacillus, nitrifying bacteria, denitrifying bacteria, and soil bacteria in ponds.

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