TWM499950U - Corresponding adjustable water purification system - Google Patents

Abstract

This invention provides a corresponding adjustable water purification system, which its flow is arranged through first stage filtration, electrolysis, second stage filtration, and returning back to aquaculture pond. The system is able to adjust its operation parameters correspondingly based on inflow dissolved solids content, and it can further improve water purification and achieve disease prevention. Meanwhile the system itself is high efficient for energy and material saving, and further can reduce the processing cost. With this system, the purpose of aqua farming without adding chemical, consistent water quality control and disease prevention can be achieved.

Description

Corresponding adjustment water purification system

This creation relates to the field of water purification technology, especially a corresponding adjustment water purification system.

The quality of aquaculture has a major impact on the survival of fish and shrimp. For example, temperature, pH value, ammonia nitrogen value, hydrogen sulfide, nitrite, transparency, dissolved oxygen, etc. in water physicochemical factors have a great impact on the survival of fish and shrimp; bacteria, viruses, fungi, parasites in biological factors Pathogens and the like also have a great impact on the survival of fish and shrimp, and the main species of parasitic diseases are rotifers, ringworms, and third-generation insects. The above-mentioned diseases affecting the survival of fish and shrimp are mainly manifested in bacterial sepsis, rot disease, enteritis disease and the like.
Intensive culture of aquatic animals often causes disease outbreaks, which is related to the quality of the culture. When the water quality deteriorates, for example, dissolved oxygen decreases, and the hydrogen sulfide content increases, the cultured fish will float and some of the fish's central nervous system will be damaged. Aquatic animals will reduce their resistance to disease due to stress from environmental degradation. The source of diseases such as viruses, bacteria, fungi or molds can cause disease infection and rapid spread when water quality deteriorates, leading to the death of fish and shrimp. In order to overcome the death of fish and shrimp caused by deterioration of water quality, it is often used to directly add chemicals to the culture water to control the disease. However, if used for a long time, the chemical composition of the drug will inevitably remain in the fish and shrimp.

To this end, the technical problem to be solved by this creation is to provide a corresponding adjustment type water purification system, which can achieve the purpose of purifying aquaculture water and controlling the cultivation of biological diseases without using chemical agents.
The present invention provides a corresponding adjusted water purification system, comprising: a pump for extracting aquaculture water, a primary filtration device connected to the pump, the primary filtration device connected to the electrolysis device, and the primary filtration device is also connected to the second The stage filtering device outputs the culture water treated by the electrolysis device to the second-stage filtering device, and the second-stage filtering device simultaneously receives the culture water treated by the electrolysis device and the culture water treated by the first-stage filtering device, and performs the same After treatment, the secondary filtration equipment returns the treated culture water to the culture pond.
Wherein, the primary filtration device is connected to the electrolysis device through a water flow sensor.
The primary filtration device is attached with a sieve.
The secondary filtration device is provided with a filter element made of fiber material.
The filter element includes nylon, plastic, polypropylene, cotton, and fine sand.
The electrode of the electrolysis device includes a copper electrode, a copper silver electrode.
The water purifying system further includes: a water-pneumatic bubble water pump connected to the second-stage filtering device and outputted by the second-stage filtering device, and the bubble water pump water is discharged into the breeding pool.
Wherein, the electrolysis device has a DC voltage ranging from 1V to 48V.
The creation also provides a sterilizing and removing mold water purification system, comprising: a pump for extracting aquaculture water, a primary filtration device connected to the pump, a primary filtration device connected to the electrolysis device, and a primary filtration device connected to the second The filtration equipment after the primary filtration equipment is treated by the electrolysis equipment, the electrolysis equipment outputs the culture water containing copper and/or silver ions to the secondary filtration equipment after treatment, and the secondary filtration equipment receives the electrolysis equipment at the same time. The culture water treated by the culture water and the first-stage filtration equipment is filtered, sterilized and mildewed, and the voltage difference is set in the filter element of the secondary filtration equipment. The inlet surface of the filter element is a positive electricity price, and the water surface is a negative electricity price.
Wherein, the voltage difference ranges from 1V to 48V.
The water purification system further includes: a movable tray on which the equipment in the water purification system can be disposed.
The corresponding adjusted water purification system described in the present invention processes the culture water through the primary filtration equipment, the electrolysis equipment and the secondary filtration equipment, and then returns it to the culture pond. When the total amount of solid matter in the culture water increases, the water quality becomes cloudy. At the time, the total amount of metal ions outputted from the electrolysis device to the secondary filtration device naturally increases, and the total amount of metal ions reacts with the total amount of solid matter outputted from the primary filtration device, and the corresponding adjustment of the culture water and purification is achieved. The purpose of breeding water is to achieve disease prevention of cultured organisms. On the contrary, when the total amount of solid matter in the culture water is reduced and the water quality becomes clear, the total amount of metal ions outputted from the electrolysis device to the secondary filtration device is naturally reduced, and the total amount of metal ions discharged from the primary filtration device is reduced. The amount of solid matter reaction is reduced, and the purpose of adjusting the culture water and purifying the culture water is achieved, and the disease prevention of the cultured organism is realized.
In addition, in this creation, the secondary filtration equipment simultaneously receives and processes the culture water treated by the electrolysis equipment and the first-stage filtration equipment. This treatment method is more efficient and energy-saving than comparing the treatment methods of the culture water to the electrolysis equipment and the secondary filtration equipment in turn. It can save the cost of equipment and materials of water purification system, reduce the manufacturing and use cost of water purification system, and realize the purpose of purifying aquaculture water and controlling biological diseases without using chemical agents.
In the electrolysis apparatus in the corresponding modified water purification system, the copper water and/or silver ions are contained in the culture water treated by the electrolysis apparatus by using the copper electrode and/or the copper silver electrode, and the copper and/or silver ions are contained. The aquaculture water is output to the secondary filtration equipment, because the secondary filtration equipment simultaneously receives the culture water treated by the electrolysis equipment and the culture water treated by the primary filtration equipment, so in the secondary filtration equipment, the primary filtration equipment flows into the culture water Bacteria will absorb the positively charged copper and/or silver ions flowing into the electrolysis equipment. After the bacteria absorb copper and/or silver ions, the bacteria begin to decay or die. At this time, the copper and/or silver ions are also organicized and disappear. Its original positive electricity price has reached the filtration and sterilization of cultured water.

10‧‧‧Water purification system
11‧‧‧Tray
12‧‧‧ pump
13‧‧‧ water pipes
14‧‧‧Primary filtration equipment
16, 26‧‧‧ branch line
18‧‧‧Water flow sensor
20‧‧‧Electrolytic equipment
22‧‧‧Secondary filtration equipment
24‧‧‧ filter
28‧‧‧bubble water pump
29‧‧‧ Inhalation valve
30‧‧‧ water pipes
32‧‧‧Electric control box
34‧‧‧ into the water surface
36‧‧‧Water surface
38‧‧‧ arrow

1 is a schematic structural view of a corresponding adjustment type water purification system according to an embodiment of the present invention;
Fig. 2 is a schematic view showing the structure of the secondary filtration device shown in Fig. 1.

Hereinafter, the present creation will be described in detail with reference to the accompanying drawings.
As shown in Fig. 1, the present embodiment provides a corresponding adjustment type water purification system which is set up beside the aquaculture pond.
The water purification system 10 includes a pump 12 for extracting aquaculture water, a primary filtration device 14 connected to the pump 12, and a primary filtration device 14 connected to the electrolysis device 20 via a water flow sensor 18, while the primary filtration device 14 is also connected. Up to the secondary filtration device 22. The culture water treated by the electrolysis device 20 is output to the secondary filtration device 22, and the secondary filtration device 22 simultaneously receives the culture water treated by the electrolysis device 20 and the culture water treated by the primary filtration device 14, and the culture water treated by the electrolysis device 20 The aquaculture water treated by the primary filtration device 14 is treated, and the secondary filtration device 22 returns the treated culture water to the culture pond.
In order to realize that the water purification system 10 is movable, it is convenient for a plurality of aquaculture water pools to use a set of water purification system 10, thereby improving equipment utilization and reducing equipment use cost. The water purification system 10 of the embodiment further includes a movable tray 11 and a water purification system. All or part of the equipment in 10 may be disposed on the tray 11.
Specifically, the water purification system 10 places most of the equipment on the tray 11, and a pump 12 is provided next to the aquaculture pond to send the culture water to the primary filtration device 14 via the water pipe 13, and the primary filtration device 14 is used to filter the solids in the water. The solid matter may be a fallen leaf, a branch, and other suspended matter, and the device may be a filter device with a strainer attached thereto. The primary filtration unit 14 is then divided into two branch lines, one line 16 flowing through the water flow sensor 18 and then connected to the electrolysis unit 20 to produce electrolytic ionized water. If the electrode of the electrolysis device 20 is made of copper, the electrolyzed ionized water contains copper ions. If the electrode of the electrolysis device 20 is made of copper silver, the electrolyzed ionized water contains copper and silver ions. Therefore, after the electrolysis reaction of the electrolysis device 20, the generated electrolyzed ion water contains: small molecule water, hydroxide ions, charged ions, metal ions generated by the electrodes, and other substances.
The electrolysis device 20 is connected to the secondary filtration device 22 via a line, and a filter cartridge 24 is disposed therein. The fiber material of the filter element 24 may be woven from nylon, plastic, polypropylene, or cotton, and the material of the filter element 24 may also be fine sand. The primary filtration device 14 is further connected to a line conduit 26 for directing the effluent directly to the secondary filtration device 22. The outlet line of the secondary filtration unit 22 is then connected to the bubble pump 28. The function of the bubble water pump 28 is to rotate the introduced water at a high speed to pressurize and inhale the outside air via the suction valve 29 to generate small bubbles in the water body, and then flow back to the culture tank through the water pipe 30. The tray 11 has an electric control box 32 for supplying power to the electrolysis device 20, the filter element 24, and the bubble water pump 28.
The water purification operation process of the water purification system 10 on the aquaculture pond is: the aquaculture water is firstly transported by the water pump 12 through the water pipe 13 to the primary filtration device 14 to filter the solid matter. Part of the aquaculture water flows through the water line sensor 18 to the electrolysis device 20 via the branch line 16 . The electric control box 32 provides a preset DC voltage to the electrolysis device 20 according to the sensing signal of the water flow sensor 18, and the maximum range that the DC voltage can be implemented can be From 1V to 48V, it is usually set in the range of 1V to 24V. If the culture water contains electrolytic substances, electrolysis and current will be generated under a set DC voltage, that is, the negative electrode price of the electrolytic material swims to the positive electrode, the positive electrode price of the electrolytic material swims to the negative electrode, and during the electrolysis process, the positive electrode metal Releases metal ions.
The electrolyzed ionized water leaves the electrolysis apparatus 20 and flows to the secondary filtration apparatus 22, and the metal ions in the electrolyzed ionized water, whether copper ions, silver ions, or ions of other metals, are retained in the filter element 24. As shown in Fig. 2, the two portions of the secondary filtration device 22 are from the electrolysis device 20 and the other portion is from the branch line 26. After the two parts of the aquaculture water are mixed, the water inlet surface 34 of the filter element 24 flows in, the water outlet surface 36 flows out, and then flows out from the outlet of the secondary filtration device 22.
In addition to filtering solids, another major advantage of the water purification system 10 is sterilization and mildew removal. The water in the branch line 16 is sterilized and sterilized by the electrolytic reaction of the electrolysis apparatus 20. The filter element 24 is usually made of a fiber-dyed method, and metal ions flowing into the electrolytic ionized water are filtered and adhered to the fibers of the filter element 24. The water in the branch line 26 contacts the copper or silver ions on the fibers when flowing through the filter element 24. Both copper and silver ions have a sterilization function, and the copper ions have a mold removing function. Therefore, when the water flows through the secondary filtration device 22, it can have effects such as filtration, sterilization, and mold removal. The filtered water is returned to the aquaculture pond to reduce the total amount of bacteria, viruses, fungi, parasitic pathogens, etc. in the pool, so that the water quality is easy to maintain. The water purification system 10, which combines partial water electrolysis and then combines filtration sterilization and mold removal, is more efficient and energy-saving and saves materials than single-line operation, that is, all the electrolysis of water and then all filtration and sterilization.
Another major advantage of the water purification system 10 is self-adjustment adjustment based on water quality conditions. The conductivity of water has a certain relationship with the water quality, that is, the higher the conductivity, the more total dissolved solids in the water. Aquaculture ponds In the process of aquatic animal breeding, the total solids content dissolved in the culture water and the total amount of bacteria in the water also have a certain parameter proportional relationship. That is, the more total solids dissolved in the culture water, the more bacteria in the culture water, and the qualitative relationship between the two. The more the total solids dissolved, the more turbid the water is. Therefore, the total amount of bacteria can usually be estimated by the change of water quality. When the water quality is turbid, the total amount of bacteria is more, and when the water quality is clear, the total amount of bacteria is reduced.
The electric control box 32 provides a preset DC voltage to the electrolysis device 20 according to the sensing signal of the water flow sensor 18. The more dissolved solids in the water, the larger the electrolysis current generated, and the more the discharged metal ions are. many. The electrode metal ions generated in the electrolysis process are retained in the filter element 24 after flowing into the secondary filtration device 22, and the filter element 24 can be filtered, sterilized, and mildewed, etc., for the water flowing from the other branch line 26. This sterilization and mold removal function can be adjusted accordingly. That is, as the total amount of bacteria flowing into the aquaculture water of the branch line 26 is increased, the amount of metal ions required to be generated by the electrolysis apparatus 20 is also relatively increased. If the total amount of bacteria flowing into the branch line 26 for aquaculture water is scarce, that is, the amount of metal ions generated by the branch line 16 flowing through the electrolysis apparatus 20 is relatively reduced. That is, the aquaculture water of the branch line 16 and the branch line 26 are all from the primary filtration device 14, so the water quality, including physical and chemical properties, is the same, and the total amount of bacteria in the aquaculture water in the branch line 26 is increased. The amount of metal ions generated by the electrolysis apparatus 20 is also increased to achieve the function of sterilization and mold removal.
The aquaculture water of the branch line 16 enters the electrolysis apparatus 20, and when the water flow sensor 18 senses the water flow, the electric control box 32 supplies a voltage to the electrolysis apparatus 20, which is a preset value. The more solids dissolved in the culture water, the higher the turbidity of the culture water, and further the increase in pollutants in the culture water or the increase in the total amount of bacteria, or the increase in the total amount of pollutants and bacteria.
Corresponding adjustment treatment in the electrolysis device means that the electrolysis device uses the copper electrode and/or the copper-silver electrode according to the characteristics of the solid matter contained in the water, that is, the turbidity or clarity of the water quality and the amount of dissolved solids in the water are more or less qualitative. The proportional relationship, and the amount of dissolved solids in water and the conductivity of water also have a qualitative proportional relationship. Therefore, according to the water quality characteristics, the amount of metal ions released by the electrolysis device can be selected, so that the treated water in the electrolysis equipment contains an appropriate amount of copper and / or silver ions, the culture water containing copper and / or silver ions is exported to the secondary filtration equipment, because the secondary filtration equipment receives the culture water treated by the electrolysis equipment and the culture water treated by the primary filtration equipment, so, in the second In the grade filtration equipment, the bacteria contained in the culture water flowing into the primary filtration equipment absorbs the positively charged copper and/or silver ions flowing into the electrolysis equipment. After the bacteria absorb copper and/or silver ions, the bacteria begin to decay or die. The copper and/or silver ions are also organicized, disappearing their original positive electricity price, and achieving filtration and sterilization of the culture water.
The more metal ions remain in the filter element 24, the better the ability and effectiveness of the filter element 24 for filtration, sterilization, and mold removal. However, sometimes the total dissolved solids in the culture water increases, but the total amount of bacteria does not increase. At this time, many metal ions in the filter element 24 are gradually oxidized and passivated in the water, thereby reducing the ability of sterilization and mold removal. If this happens in freshwater aquaculture, lower the default value of the original voltage to reduce the production of metal ions. In marine aquaculture, after the total dissolved solids in the water is deducted from the salt sodium chloride, the subsequent inference is the same as the freshwater aquaculture, except that the voltage is preset to a different value and must be much lower.
The water quality of the aquaculture ponds varies from day to day and is different during the day and night. The greater total dissolved solids in the culture water indicates an increase in pollutants in the pool or an increase in the total amount of bacteria, or an increase in the total amount of pollutants and bacteria. The corresponding adjustment mode provided by the water purification system 10 can increase the ability and effect of the filter element 24 in filtration, sterilization, and mold removal.
Further, a voltage difference is added between the water inlet surface 34 and the water outlet surface 36 of the filter element 24, that is, the water inlet surface 34 is a positive electricity price, and the water outlet surface 36 is a negative electricity price. The voltage difference can be provided or installed by the electric control box 32. A battery to maintain the voltage difference. The maximum voltage difference can be implemented from 1V to 48V, and is usually set in the range of 1V to 24V. The bacteria in the culture water are often negatively charged. When the culture water flows through the filter core 24, the bacteria absorb the positive electricity price of copper or silver ions, and the bacteria begin to decay or die. At the same time, the electrode metal ions are passivated and the original positive electricity price disappears. . When the aquaculture water flow is stopped, a voltage difference is added between the inlet surface 34 and the outlet surface 36 to free the bacteria upstream, that is, the bacteria are brought closer to the inlet surface 34. This arrangement causes the bacteria to not diffuse downstream when the pump 12 is shut down. When the culture water stream restarts the flow filter element 24, the newly flowed metal ions are easily combined with the bacteria in the vicinity of the water inlet surface 34.
There has been a lot of improvement in the water quality at the outlet of the secondary filtration device 22, and the acidity and alkalinity, the total nitrogen, the transparency, the chemical oxygen demand, and the like are all improved. If the water purification system 10 is used for other water purification applications, for example, in a landscape pool, where the flora and fauna living in the water is limited, then the water purification system to this part is also adapted.
Intensive culture of aquaculture ponds, when the total dissolved solids in the water increases, usually indicates that the water body has an urgent need to increase the dissolved oxygen amount in a short time, and the bubble water pump 28 is connected via the branch pipe to increase the dissolved oxygen in the water. The bubble water pump 28 is a high-pressure water pump, and the culture water is rotated by the high pressure in the bubble water pump 28, and the centrifugal force pressure difference generated by the high-pressure rotation enables the suction valve 29 to suck in the outside air to generate air bubbles. The smaller the bubbles produced, the better. Generally, the micron-sized bubbles can stay in the water for a longer period of time than the millimeter-sized bubbles.
The bubble water pump 28 receives the water pipe 30 and returns to the aquaculture tank. The portion of the water pipe 30 in the aquaculture tank has perforations. The filtered water is mixed with small bubbles and released into the culture tank. The small bubbles in the pool are densely increased, so that the dissolved oxygen content of the water body is close to saturation. The dissolved oxygen and hydrogen sulfide of the water react to form sulfur dioxide, react with nitrous acid to form nitric acid, and oxidative decomposition reaction of organic matter. These reactions require a large amount of dissolved oxygen to be consumed, and after the dissolved oxygen is consumed, it can be quickly replenished by dissolving oxygen in the small bubbles in water. Water containing small bubbles moving direction of the arrow 38, so that breeding pond water quality, including physical and chemical factors and biological factors can be improved step by step, until another near the suction side of the pump 12.
After the water quality of the culture pond is completed and maintained, the entire tray 11 and the equipment above it can be transferred to the next aquaculture tank, and the water inlet and return water pipelines of the next culture tank can be operated.
The water purification system 10 and the aquaculture pond of the present embodiment form a circulation system to maintain the water quality of the culture. The water quality of the aquaculture pond is changed every morning and evening, and the water purification system 10 provides corresponding adjustments in an automatically controlled manner. When the total dissolved solids in the water increases, the electrolysis device 20 can sense and provide the required amount of metal ions, so that the ability of the secondary filtration device 22 to filter and sterilize the mold is adjusted accordingly. In addition, when the total dissolved solids in the water increases, correspondingly supply sufficient micro-bubbles to the aquaculture pond to improve the water quality, and the water in the culture pond and the water purification system 10 form a loop, so that the micro-bubbles are gradually transmitted to the whole culture. The pool also avoids many problems caused by lack of oxygen in the pool. The treatment method described in this embodiment is simple and convenient, easy to operate, and achieves the effects of filtration, sterilization, mold removal, oxygenation, and energy saving, and the effect is remarkable.
In summary, in the corresponding adjustment type water purifying system, the culture water is treated by the primary filtration equipment, the electrolysis equipment and the secondary filtration equipment, and then returned to the culture water tank, when the solid matter in the culture water is total. When the amount is increased and the water quality becomes turbid, the total amount of metal ions outputted from the electrolysis equipment to the secondary filtration equipment will naturally increase, and the total amount of metal ions reacts with the total amount of solids outputted from the primary filtration equipment to reach a corresponding The purpose of adjusting aquaculture water and purifying aquaculture water has achieved disease prevention of cultured organisms. On the contrary, when the total amount of solid matter in the culture water is reduced and the water quality becomes clear, the total amount of metal ions outputted from the electrolysis device to the secondary filtration device is naturally reduced, and the total amount of metal ions discharged from the primary filtration device is reduced. The amount of solid matter reaction is reduced, and the purpose of adjusting the culture water and purifying the culture water is achieved, and the disease prevention of the cultured organism is realized.
In addition, in this creation, the secondary filtration equipment simultaneously receives and processes the culture water treated by the electrolysis equipment and the first-stage filtration equipment. This treatment method is more efficient and energy-saving than comparing the treatment methods of the culture water to the electrolysis equipment and the secondary filtration equipment in turn. It can save the cost of equipment and materials of water purification system, reduce the manufacturing and use cost of water purification system, and realize the purpose of purifying aquaculture water and controlling biological diseases without using chemical agents.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present creation. Any modifications, equivalent replacements, improvements, etc., which are made within the spirit and principles of the present creation, should be included in the present creation. Within the scope of protection.

10‧‧‧Water purification system

11‧‧‧Tray

12‧‧‧ pump

13‧‧‧ water pipes

14‧‧‧Primary filtration equipment

16, 26‧‧‧ branch line

18‧‧‧Water flow sensor

20‧‧‧Electrolytic equipment

22‧‧‧Secondary filtration equipment

24‧‧‧ filter

28‧‧‧bubble water pump

29‧‧‧ Inhalation valve

30‧‧‧ water pipes

32‧‧‧Electric control box

38‧‧‧ arrow

Claims (10)

[Item 1] A corresponding adjustment type water purification system, comprising: a pump for extracting aquaculture water, a primary filtration device connected to the pump, a primary filtration device connected to the electrolysis device, and the primary filtration device is also connected to the secondary filtration The equipment, the culture water treated by the electrolysis equipment according to the water quality characteristic is output to the second-stage filtering equipment, and the second-stage filtering equipment simultaneously receives the culture water treated by the electrolysis equipment and the culture water treated by the first-stage filtration equipment, and performs the same Corresponding to the adjustment process, the secondary filtration equipment returns the treated culture water to the culture pond. [Item 2] A corresponding modified water purification system according to claim 1, wherein the primary filtration device is connected to the electrolysis device by a water flow sensor. [Item 3] The corresponding modified water purification system according to claim 1, characterized in that the primary filtration device is attached with a sieve. [Item 4] The corresponding modified water purification system according to claim 1, wherein the secondary filtration device is provided with a filter element. [Item 5] The corresponding modified water purification system of claim 4, wherein the filter element comprises one of nylon, plastic, polypropylene, cotton, and fine sand. [Item 6] A corresponding modified water purification system according to claim 1, wherein the electrode of the electrolysis device comprises a copper electrode or a copper silver electrode. [Item 7] The corresponding modified water purification system according to any one of claims 1 to 6, further comprising: a water augmentation bubble water pump connected to the secondary filtration device and outputted by the secondary filtration device, the bubble The water output from the pump is output to the aquaculture tank. [Item 8] A corresponding modified water purification system according to any one of claims 1 to 6, characterized in that the voltage of the electrolysis device ranges from 1 V to 48 V. [Item 9] A corresponding adjustable water purification system capable of sterilizing and removing mold, comprising: a pump for extracting aquaculture water, a primary filtration device connected to the pump, a primary filtration device connected to the electrolysis device, and a primary filtration device Connected to the secondary filtration equipment, after the treated water treated by the primary filtration equipment is treated by the electrolysis equipment, the electrolysis equipment outputs the treated water containing copper and/or silver ions to the secondary filtration equipment, and the secondary filtration equipment simultaneously receives The culture water treated by the electrolysis equipment and the culture water treated by the first-stage filtration equipment are filtered, sterilized and mildewed, and the voltage difference is set in the filter element of the secondary filtration equipment. The inlet surface of the filter element is positive electricity price, and the water surface is negative. Electricity price. [Item 10] The sterilizable mold-removing corresponding modified water purification system according to claim 9, wherein the voltage difference ranges from 1V to 48V.