KR100432385B1 - Apparatus for removing algae by electrochemical analysis using solar cells - Google Patents

Abstract

The present invention relates to a device for extinction of algae that is the cause of green algae using the electrolysis principle, which supplies power to solar cells using the amount of sunshine in summer, which also causes algae proliferation, and the algae are killed by the electrolysis principle. Or they developed a device that can remove algae at low cost by using decomposable properties.

In the upper part, solar cells are attached in series so that the number of cells can be varied according to the water quality of the lake and the algae concentration, and the lower part is insoluble to allow electrolysis of algae (platinum, iridium, ruthenium, stainless steel, etc.). Or a soluble (iron, aluminum) electrode is attached, and the center part has a watertight structure such as pratic to allow the device to float.

In the summer, algae thrive, which gives taste and smell to water, induces toxicity, and increases the cost of water purification by using a large amount of algae, activated carbon, and media in the water purification process, but the present invention kills these algae and settles them. Or disassemble it. There has been no special method for removing algae from the reservoir, but the introduction of this method will greatly help to remove algae from the reservoir.

Description

Apparatus for removing algae by electrochemical analysis using solar cells}

Most of Korea's lakes, which are used as drinking water sources such as Daecheong Lake, are in eutrophication, and during the summer months when there is a lot of sunshine, algae thrive, which not only makes the water of the reservoir cloudy and smells, but also hinders the aesthetics of the lake. In addition, the use of a large amount of disinfectant (chlorine, etc.) in the water purification process, causing clogging of the filter paper, a large amount of activated carbon, such as a lot of water purification costs, and toxic harmful substances (chlorine disinfection process and algae itself) In the case of Daecheongho, it is difficult to use it as drinking water due to the toxins that cause nervous system disorders and hepatic toxicity in birds such as the genus microcystis and Oscillatoria. The present invention has developed a device that can remove algae at low cost by using the amount of sunshine in summer and the characteristics that algae can be killed or decomposed by the electrolysis principle.

Principle of decomposition of organic materials by electrochemical method is used. Conventional techniques using this principle have introduced wastewater treatment technology using various electrode materials such as iron, aluminum, copper, and platinum electrodes. In addition, soluble electrodes such as iron or aluminum are eluted during electrolysis to leave divalent or trivalent metallic cations in the water, and in this process, they are aggregated with fine suspended matter in the water and serve as a flocculant to favor precipitation. Although the principle of electrolysis is relatively simple, it has not been activated as much as biological treatment method due to excessive power ratio, but it is difficult to biologically treat biological treatments such as dyeing wastewater, leather wastewater, and leachate because it can decompose organic materials, especially pigments It has been used a lot for the purpose of reprocessing pigment | dye and organic substance which remain afterwards.

Lake green algae are caused by excessive inflow of nutrients such as organic substances and nitrogen phosphorus in the lake, rise in summer water temperature, and abundant sunshine, and the fundamental countermeasure to prevent this is to restrict the inflow of pollutants upstream. Environmental basins such as sewage treatment plants, livestock wastewater treatment plants and manure treatment plants are installed in the watershed to remove them from the source. The government has invested tremendous resources. However, old lakes, such as the Daecheong Lake, already contain large amounts of contaminants in the lake and reside in the lake due to the effects of stratification and pollution, which can lead to prosperity whenever the weather conditions necessary for algae growth are met. . Therefore, contaminated lake water purification technology is required, and there is no effective method for this. In the appeal, there is an underwater aeration system, which injects air into the deep part of the appeal to prevent anaerobicization of the deep part and forcibly circulates cold water in the deep part to suppress algae growth, or only a very part of the appeal. Can't and the effect is very slight. In addition, there is a method of killing algae by spraying copper sulfate or injecting chlorine in a large amount, but it is difficult to use for reservoir water used as drinking water. There is a method to block the light transmission in the lake by installing a light shielding film, but if it is completely blocked, oxygen supply to the air is also blocked, which reduces the dissolved oxygen concentration in the water. Rather, only the waste is weighted. In order to remove the red tide mainly generated in the coastal areas such as the sea, there has been a study using the electrolysis principle, but it is a structure that pulls up the seawater mixed with the red tide and oxidizes it in the electrolytic cell and discharges it, and it is difficult to supply power, and solubility such as iron and aluminum electrode Practical use was low for reasons such as difficult management using an electrode.

An object of the present invention is to solve the problem that the lake in which the algae inhabits an incredibly large space, so that the algae is less efficient in removing algae. It is to develop a floating algae removal device using an electrolytic electrode capable of automatic power supply using the.

1 is a perspective view of an electric decay type algae removal device using a solar cell

Figure 2 is a plan view of the electric decay type algae removal device using a solar cell

Figure 3 is a front view of the electric decay algae removal device using a solar cell

Figure 4 is a side view of the electric decay algae removal device using a solar cell

Figure 5 is a bottom view of the electric decay algae removal device using a solar cell

Figure 6 is a detailed view of each part of the device

<Description of Symbols for Main Parts of Drawings>

① Solar panel (Structure of connecting solar cells with the size of 10Cm * 10Cm)

② Floating part of the device with donut-shaped watertight tubular structure

③ electrolytic electrode

④ support shaft

⑤ weight

Electrical decay type algae removal apparatus using a solar cell according to the present invention to achieve the above object is a solar cell; A floating part having a structure capable of floating the entire device in water; A support shaft supporting the solar cell and the floating part; And an electrolytic electrode supported by the support shaft and electrically connected to the solar cell, wherein the algae is killed or settled by the electrolytic electrode electrically connected to the solar cell. A preferred embodiment of the present invention will be described in detail with reference to the present invention. The present invention has been developed by the algae killing and decomposing and extinguishing device capable of self-power generation using electrolytic principles and characteristics of solar cells. 1 and 6, the solar panel of ① has a structure in which solar cells having a size of 10 cm * 10 cm are connected, and the arrangement of horizontal and vertical according to algae concentration, water pollution concentration, and current density of electrode required. The number can be adjusted, the size of the panel can be different, and it has a structure that can control the voltage and current density by connecting in series. In addition, a plastic frame is used to fix the panel. In FIGS. 1 and 6, ② is a donut-shaped watertight tubular structure, which allows the algae removal device to float, and the type and weight of the electrode in addition to the standard of FIG. Depending on the diameter, the injury should be possible. Examples of preferred materials include plastic, rubber, ceramic, and the like. In FIGS. 1 and 7, a wire mesh cylindrical electrode and a rod-shaped electrode in the inner center are used as a cathode and an anode, respectively. Surface area and length can be altered depending on algal concentration and treatment purpose. As the material of the electrode, an insoluble or soluble electrode is used. Specifically, platinum is coated on stainless steel, iron, aluminum, or titanium plate for the cathode and anode material, ruthenium is coated on the titanium plate, and iridium on the titanium plate. The coating and the like are used, the shape of the electrode can be used, such as wire mesh, disk shape, square plate shape. In addition, the same material may be used for the cathode and the anode or may be different from each other. The terminals are configured to automatically remove foreign substances by changing the terminals of the negative electrode and the positive electrode once every several months or a year. In Figures 1 and 7, ④ serves to connect and support each part of the device with a support shaft. It is composed of plastic or stainless steel that can adjust the position of each part up and down. In addition, there may be a wire for transferring the current of the solar cell to the electrode inside. In Figures 1 and 7, ⑤ is a weight to maintain the center of gravity of the device, the center of gravity is stabilized by the use of a square or disk-shaped electrode. The present invention automatically supplies the power of the electrolysis device using a solar cell, and decomposes or kills algae using OH radicals generated during the electrolysis process, thereby providing a semi-permanent algae removal device without additional power. The electrolytic principle of DC power is based on the principle of electrolysis of water to obtain OH radicals and the decomposition or killing of algae using the strong oxidation of the OH radicals.Anode 2H2O = O2 + 4e- + 4H + ------------------------- (1) 4OH- = 2H2O + 4e- + O2 ------------- ------------ (2) Cathode 2H + + 2e- = H2 ----------------------- (3) 2H2O + 2e- = H2 + 2OH- ------------------- ------ (4) OH radicals generated in the cathode decompose organic matter such as algae. In addition, a soluble electrode such as blue or aluminum undergoes the following hydroxide reaction during electrolysis to form a flocculant.Fe = Fe3 + + 3e- ------------------- ----- (5) Fe3 + + 3OH- = Fe (OH) 3 ↓ Settling or injury --------------------- (6) Al = Al3 + + 3e- ----------------------- (7) Al3 + + 3OH- = Al (OH) 3 ↓ Sedimentation or injury -------- ------------- (8) Finally, Fe3 + and Al3 + produced at the anode are combined with alkalinity to precipitate as hydroxides. Therefore, it acts as a flocculant to settle suspended matter such as dead algae and untreated organic matter.Solar cells vary depending on the product, but can be supplied with 0.3 Volt 3 Amps from approximately 10Cm * 10Cm cells. This device is designed to get the desired current by connecting the solar cells in series so that it does not use the existing external power source. It is possible to float the device on the water surface using a tubular plastic container. It is supposed to be. The electrodes are semi-researchable using insoluble electrodes coated with platinum group metals such as platinum, iridium, and ruthenium on titanium, and have fixed bolts on the shaft to adjust the water surface and the position of the electrodes. The electrode uses a cylindrical wire mesh and a rod-shaped electrode in the center as a cathode and an anode, respectively, and in some cases a square or rectangular plate electrode can be used. Depending on the nature of the water (lake) to remove algae, soluble electrodes, such as aluminum electrodes, iron electrodes, etc. can be installed. The iron electrode may be reddish in water, so it should be carefully selected according to the purpose of using the water. <Performance Experiment 1> Various experiments were conducted to test the performance of the present invention. By harvesting the lake water of Daecheongho Lake in a tank of 1m * 1m * 1.5m in height and height, the algae of genus anabaena and microcystis become the dominant species. The experiment was carried out for 8 days until 10 days. Various experiments were conducted, but the test was performed using an insoluble cylindrical mesh electrode coated with platinum on titanium in a power supply of 20 solar cells connected to the structure shown in the diagram. The side of the tank was shaded with a black cloth to prevent light transmission, and light was transmitted only above. The device was fixed and the sampling point to be used for inspection was fixed with a pipette at the center of the five-axis mesh electrode to secure a fixed position and collected at an hourly interval. As a result of the test, the average decrease rate of algae cells was 8.2% after 1 hour, 13.9% after 2 hours, 18.5% after 3 hours, and 21.9% after 4 hours. . The removal rate of COD concentration was 6.2% after 1 hour, 11.2% after 2 hours, 15.2% after 3 hours, and 18.2% after 4 hours, respectively. . In order to reduce the effect of the decrease in the amount of sunshine, after 5 pm was irradiated from the top using two 60-watt incandescent lamp. Table 1 shows the results of the continuous treatment of the performance test 1. <Performance Experiment 2> Under the conditions of Performance Experiment 1, the electrolyzer was tested in batch mode. The electrolytic cell was made of a transparent acrylic bath of 6cm * 10.5cm * 12cm in width and height, and the electrode plate was arranged with 4 square electrode plates of 10Cm * 10Cm * 1mm at 1Cm intervals. A power source (6V 3A) in which 20 10Cm * 10Cm solar cells were in series was used. As shown in the following Table 2, the algal cell number reduction rate was 29.1% after 30 minutes, 47.4% after 1 hour, 62.4% after 2 hours, 69.3% after 3 hours, and 71.1% after 4 hours. The effect was found to be excellent. The removal rate of COD concentration was 26.7% after 30 minutes, 44.4% after 1 hour, 61.9% after 2 hours, 70.6% after 3 hours, and 73.8% after 4 hours. High. However, after treatment, algae sludge emerged and was collected in the central part of the treatment tank. Table 2 is a table showing the batch treatment results of the performance test 2.

As described above, the present invention is a period in which algae thrives in a large amount of sunshine, so that the use of a solar cell is advantageous, the automatic power supply is possible, and an apparatus for killing or extinguishing algae using an insoluble or soluble electrode. At present, it has the characteristic of removing algae from large lakes, which have almost no countermeasures. Insoluble electrodes can be used semi-permanently, and do not generate harmful substances even if they are suspended on the surface at all times and are economical because they do not use a separate external power source.

Claims (5)

In the algae removal device for removing algae of the lake, A solar cell generating power from solar heat; A floating part having a structure capable of floating the entire device in water; A support shaft supporting the solar cell and the floating part; An electrolytic electrode supported by the support shaft and electrically connected to the solar cell; and It includes a weight connected to the support shaft in order to maintain the balance of the whole device in water, Algae is annihilation or extinction of the algae by the electrolytic electrode electrically connected to the solar cell. The method of claim 1, The solar cell has a rectangular shape, and can control the arrangement and number of the horizontal and vertical in accordance with the water pollution concentration, algae concentration, and has a structure that can control the voltage and current density by connecting in series Electric decay algae removal device using. The method of claim 1, The floating portion is an electric decay type algae removal device using a solar cell, characterized in that any one selected from the group consisting of plastic, rubber, and ceramic. The method of claim 1, The electrolytic electrode may be made of any one selected from the group consisting of platinum coated on stainless steel, iron, aluminum, titanium, titanium plate, ruthenium on titanium plate, and iridium on titanium plate. And, having any one shape selected from the group consisting of a wire mesh type, a disc type, and a rectangular plate type, and using the solar cell according to the present invention. delete