CN111924939A - Method for removing ammonia nitrogen and nitrite in aquaculture water body through microelectrode - Google Patents
Method for removing ammonia nitrogen and nitrite in aquaculture water body through microelectrode Download PDFInfo
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- CN111924939A CN111924939A CN202010639794.1A CN202010639794A CN111924939A CN 111924939 A CN111924939 A CN 111924939A CN 202010639794 A CN202010639794 A CN 202010639794A CN 111924939 A CN111924939 A CN 111924939A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/4606—Treatment of water, waste water, or sewage by electrochemical methods for producing oligodynamic substances to disinfect the water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/46104—Devices therefor; Their operating or servicing
- C02F1/46109—Electrodes
- C02F2001/46133—Electrodes characterised by the material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
- C02F2101/166—Nitrites
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
The invention provides a method for removing ammonia nitrogen and nitrite in an aquaculture water body by using a microelectrode, wherein one or more than one group of anode and cathode electrodes which are connected in parallel and connected with a stabilized voltage power supply are put into the aquaculture water body, a water pump for turning over the water body is arranged at the bottom of each electrode, or an aeration device is arranged around each electrode, the salinity of the aquaculture water body is more than 0.1 per thousand, a Ti/RuO2-IrO2 electrode is adopted as the anode, a graphite plate is adopted as the cathode, the area of each electrode is 8cm multiplied by 6cm, the distance between the electrode plates is 1.5mm, the voltage of the stabilized voltage power supply is 0-24V, and the current is 0-50A. The invention adopts a microelectrode electrolysis method, can effectively remove ammonia nitrogen and nitrite in aquaculture water or aquaculture tail water, has the advantages of high removal rate, low energy consumption, low equipment investment, convenient operation and the like, can quickly sterilize when contacting viruses, fungi and bacteria in the water, has obvious effect, promotes the water to be converted into 'live water', and has the effects of sterilizing and preventing diseases for aquatic animals.
Description
Technical Field
The invention relates to the technical field of water purification, in particular to a method for removing ammonia nitrogen and nitrite in an aquaculture water body by using a microelectrode.
Background
Aquatic products are deeply loved by consumers and have huge market demand, so that aquaculture is very common at home and abroad. However, in the aquaculture process, the aquaculture water body or the aquaculture tail water is often polluted to different degrees, which is not beneficial to aquaculture of aquatic products, and the water body or the tail water needs to be purified continuously. Various treatment technologies for aquaculture water bodies are developed at present, such as mechanical filtration, ultraviolet and ozone sterilization, water body oxygenation, artificial cultivation of beneficial algae or biological agent feeding and the like. However, these water purification technologies also have some technical defects, such as that technologies such as mechanical filtration, ultraviolet and ozone sterilization cannot remove soluble harmful substances such as ammonia nitrogen and nitrite, and cannot increase dissolved oxygen in water, and a water circulation device causes high cost and high energy consumption; the chemical reagent treatment method is easy to cause destructive influence on the water body and harm the survival of aquatic organisms such as fishes and shrimps; the treatment method of a single biological preparation is adopted, the effect is limited and short, and the preparation needs to be continuously added for maintenance; the treatment efficiency of the culture water with complex pollutant composition is not high by adopting a biomembrane or activated sludge method, and the like. Therefore, it is necessary to provide a novel treatment technique for in-situ treatment of water bodies, which can overcome the above disadvantages, meet the requirements of national environmental protection and green concept, and aim at the characteristics of aquaculture water bodies and aquaculture tail water.
Disclosure of Invention
The invention aims to provide a method for removing ammonia nitrogen and nitrite in an aquaculture water body by using a microelectrode electrolysis method, which can effectively remove the ammonia nitrogen and nitrite in the aquaculture water body or aquaculture tail water and has the advantages of high removal rate, low energy consumption, less equipment investment, convenient operation and the like.
In order to achieve the purpose, the technical scheme adopted by the invention is as follows:
a method for removing ammonia nitrogen and nitrite in aquaculture water by using a microelectrode comprises the steps of putting one or more groups of anode and cathode electrodes connected in parallel and connected with a stabilized voltage power supply into the aquaculture water, wherein the bottom of each electrode is provided with a water pump for turning over the water, or the periphery of each electrode is provided with an aeration device.
According to the scheme, the salinity of the aquaculture water body is more than 0.1 per mill.
According to the scheme, the aeration device is provided with the air pipe or the micro aeration pipe with the hole, and the air bubbles are generated in the aquaculture water body through the air blowing device, so that the electrode can fully perform micro electrolysis reaction.
According to the scheme, the anode adopts Ti/RuO2-IrO2The cathode is a graphite plate, the area of the electrode is 8cm multiplied by 6cm, the distance between electrode plates is 1.5mm, the voltage of the voltage-stabilized power supply is 0-24V, and the current is 0-50A.
The invention adopts one or more groups of positive electrodes and negative electrodes which are connected in parallel and are arranged in the aquaculture water body with the salinity of more than 0.1 per mill, so that the microelectrodes can carry out oxidation-reduction micro-electrolysis treatment on substances contained in the water to generate the indirect oxidation action of chlorine and hypochlorous acid. On the surface of the anode, chloride ions are converted into chlorine and react with water to generate effective residual chlorine, and ammonia nitrogen and nitrite in the water are contacted with the effective residual chlorine and oxidized to be removed. The invention adopts equipment (such as 220V low-power water pumps, nano aeration pipes, water scraping vehicles for oxygenation and the like) which can make water containing hypochlorous acid flow by electrolysis, and can be quickly mixed with other water containing ammonia nitrogen and nitrite to quickly remove ammonia nitrogen and nitrite, thereby greatly reducing energy consumption and saving equipment engineering investment.
The output voltage and current of the power supply of the electrode in the electrolytic oxidation process are automatically adjusted along with different pH values (the pH value of the aquaculture water body is 7.8-8.6), salinity (the salinity of the aquaculture water body is 0.5-15 per thousand) and water temperatures (16-33 ℃) of the water body, so that the removal of ammonia nitrogen and nitrite by electrolysis is maximized and the energy consumption is minimized.
The invention has the beneficial effects that:
1) the invention can effectively remove ammonia nitrogen and nitrite in the culture water body or the culture tail water through the micro-electrolysis reaction of the electrode;
2) the invention adopts the equipment which allows water to have micro-flow, can accelerate the removal of ammonia nitrogen and nitrite, thereby greatly reducing energy consumption, saving equipment engineering investment and being convenient to operate;
3) the water body treated by the method has greatly reduced COD, ammonia nitrogen, nitrite and the like, increased dissolved oxygen, safety and no toxicity to human beings and aquatic animals, can quickly sterilize when contacting viruses, fungi and bacteria in the water body, has obvious effect, promotes the water body to be 'live water', and has the effects of sterilizing and preventing diseases for the aquatic animals.
Detailed Description
The technical solution of the present invention will be described with reference to the following examples.
Example 1:
the invention provides a method for removing ammonia nitrogen and nitrite in aquaculture water by using a microelectrode, wherein a Ti/RuO (titanium/RuO) anode is adopted2-IrO2The cathode is a graphite plate, the area of the electrode is 8cm multiplied by 6cm, the combination of 4 cathodes and 3 anodes is adopted, the distance between the electrode plates is 1.5mm, the voltage of a stabilized voltage power supply is 0-24V, the current is 0-50A, the bottom of the electrode is provided with an 80W220V submersible pump, and the water flow is 10m3/h。
The implementation is carried out in a five-team aquaculture area of the Ping Sha Zhen Yongbao aquaculture cooperative of Ping Sha Zhen Yongbao, Zhuhai City, Guangdong province, the aquaculture area is used for culturing the south American white prawns, and the water area of the pond is 800 cubic meters.
Data before the test: detecting the water quality of the water body at 2 o' clock at noon, at the water temperature of 28 ℃ and the pH value of the water body: 8.5 of pH value, 4mg/L of ammonia nitrogen, 0.3mg/L of nitrite, 3 per mill of salinity and 5.4mg/L of dissolved oxygen.
The test results are as follows:
1) the test was measured after 24 hours (2 am on the following day): the water temperature is 28 ℃, and the pH value of the water body is: 8.5 of pH value, 2mg/L of ammonia nitrogen, 0.1mg/L of nitrite, 3 per mill of salinity and 6mg/L of dissolved oxygen.
And (3) knotting: the ammonia nitrogen removal rate is 50 percent, the nitrite removal rate is 66.67 percent, and the dissolved oxygen is increased by 11 percent.
2) After 48 hours (2 am) the test measured: the water temperature is 28 ℃, and the pH value of the water body is: 8.5 of pH value, 0.2mg/L of ammonia nitrogen, 0.05mg/L of nitrite, 3 per mill of salinity and 6.2mg/L of dissolved oxygen.
And (3) knotting: the ammonia nitrogen removal rate is 95 percent, the nitrite removal rate is 83.33 percent, and the dissolved oxygen is increased by 14.8 percent.
3) After 72 hours (2 am) the test measured: the water temperature is 28 ℃, and the pH value of the water body is: 8.4 of pH value, 0.01mg/L of ammonia nitrogen, 0.002mg/L of nitrite, 3 per mill of salinity and 7.0mg/L of dissolved oxygen.
And (3) knotting: the ammonia nitrogen removal rate is 99.75 percent, the nitrite removal rate is 99.33 percent, and the dissolved oxygen is increased by 29.6 percent.
Summary of the test: 99.75 percent of ammonia nitrogen removal rate, 99.33 percent of nitrite removal rate and 29.6 percent of dissolved oxygen increase after 72 hours, and also meets the requirement that a gradual treatment method is adopted when the water quality changes in the aquaculture process, the rapid treatment can not be carried out, otherwise, the stress injury is larger.
The treatment method is beneficial to the restoration and protection of the culture water body or tail water and the safe and high yield of the aquatic product, and the main surfaces are as follows: the main functions of the medicine are shown in the following aspects:
firstly, the method comprises the following steps: improving water quality, increasing dissolved oxygen, reducing ammonia nitrogen and nitrite content, and increasing survival rate of fish and shrimp.
After the treatment method is adopted for treatment, the water quality is obviously improved, the visibility of a water body reaches about 35 centimeters, the content of ammonia nitrogen and nitrite is obviously reduced, the fish and shrimp floating head phenomenon is greatly improved, the floating head phenomenon basically does not exist, and an aerator does not need to be started in the daytime.
Secondly, the method comprises the following steps: the anti-stress reaction capability of the fry is enhanced, and the death rate of the fry and the shrimp caused by oxygen deficiency is reduced.
Before the treatment method is not adopted, the death rate of the fish and shrimp fries is high, particularly when the fish and shrimp fries are thrown for one week, the whole pond fish and shrimp fries sometimes die, and particularly when raining or white rain (suddenly changing from sunny to rainy), the death rate of the fish and shrimp fries is higher. And the death rate is higher due to the lack of oxygen at night. After the treatment method disclosed by the invention is used for treating the fish and shrimp fries, the survival rate of the fish and shrimp fries is greatly improved. Under the condition of high-density culture, by adopting the treatment method at the water inlet and the water outlet and adding the waterwheel type aerator, the death condition of the fish and shrimp fries is greatly improved and basically rarely died, meanwhile, the survival rate of the fish and shrimp fries is greatly improved, and the phenomenon of large-scale death caused by oxygen deficiency at night does not occur.
Thirdly, the method comprises the following steps: the ecological breeding of the fish and the shrimp is enabled to enter a higher level.
At present, after the treatment method is adopted in a fish and shrimp culture pond, the water quality of the whole fish and shrimp pond is greatly improved, the concentration of ammonia nitrogen and nitrite is greatly reduced, compared with a pond without the treatment method, the morbidity is greatly reduced in the whole culture production process, the growth speed is also improved to a certain extent, and a new ecological fish and shrimp culture mode with less medicine or even without medicine is really realized.
The method for treating ammonia nitrogen and nitrite in the water body can benefit more aquaculture households, and is beneficial to water body restoration and protection and high yield of the aquatic product.
The above embodiments are only used for illustrating but not limiting the technical solutions of the present invention, and although the above embodiments describe the present invention in detail, those skilled in the art should understand that: modifications and equivalents may be made thereto without departing from the spirit and scope of the invention and any modifications and equivalents may fall within the scope of the claims.
Claims (4)
1. A method for removing ammonia nitrogen and nitrite in aquaculture water by using a microelectrode is characterized in that a group or more than one group of anode and cathode electrodes which are connected in parallel and connected with a voltage-stabilized power supply are put into the aquaculture water, and the bottom of each electrode is provided with a water pump for turning over the water or an aeration device is arranged around the electrode.
2. The method for removing ammonia nitrogen and nitrite from aquaculture water by using the microelectrode of claim 1, wherein the salinity of the aquaculture water is more than 0.1 per thousand.
3. The method for removing ammonia nitrogen and nitrite from aquaculture water through the microelectrode of claim 1, wherein the aeration device is provided with an open-pore air pipe or a micro-aeration pipe, and bubbles are generated in the aquaculture water through a blowing device.
4. The method for removing ammonia nitrogen and nitrite from aquaculture water through the microelectrode of claim 1, wherein a Ti/RuO2-IrO2 electrode is adopted as the anode, a graphite plate is adopted as the cathode, the area of the electrode is 8cm x 6cm, the distance between electrode plates is 1.5mm, the voltage of the stabilized voltage power supply is 0-24V, and the current is 0-50A.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010639794.1A CN111924939A (en) | 2020-07-06 | 2020-07-06 | Method for removing ammonia nitrogen and nitrite in aquaculture water body through microelectrode |
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| CN202010639794.1A CN111924939A (en) | 2020-07-06 | 2020-07-06 | Method for removing ammonia nitrogen and nitrite in aquaculture water body through microelectrode |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113754047A (en) * | 2021-09-29 | 2021-12-07 | 浙江大学 | Nitration and denitrification integrated water treatment system |
| CN115784470A (en) * | 2022-12-28 | 2023-03-14 | 广东省源天工程有限公司 | Method for removing nitrate nitrogen in sewage by combining electric enhanced biological membrane |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236525A (en) * | 2015-11-15 | 2016-01-13 | 江苏丹诚环境工程有限公司 | Electro-catalysis treatment device for seawater circulation culture system |
| CN105502584A (en) * | 2015-12-17 | 2016-04-20 | 浙江大学 | Device and method for removing ammonia nitrogen, nitrite nitrogen and COD in marine culture wastewater |
| CN208413938U (en) * | 2018-04-16 | 2019-01-22 | 盐城工业职业技术学院 | A kind of marine culture water ammonia nitrogen online processing device |
-
2020
- 2020-07-06 CN CN202010639794.1A patent/CN111924939A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105236525A (en) * | 2015-11-15 | 2016-01-13 | 江苏丹诚环境工程有限公司 | Electro-catalysis treatment device for seawater circulation culture system |
| CN105502584A (en) * | 2015-12-17 | 2016-04-20 | 浙江大学 | Device and method for removing ammonia nitrogen, nitrite nitrogen and COD in marine culture wastewater |
| CN208413938U (en) * | 2018-04-16 | 2019-01-22 | 盐城工业职业技术学院 | A kind of marine culture water ammonia nitrogen online processing device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113754047A (en) * | 2021-09-29 | 2021-12-07 | 浙江大学 | Nitration and denitrification integrated water treatment system |
| CN113754047B (en) * | 2021-09-29 | 2022-12-30 | 浙江大学 | Nitration and denitrification integrated water treatment system |
| CN115784470A (en) * | 2022-12-28 | 2023-03-14 | 广东省源天工程有限公司 | Method for removing nitrate nitrogen in sewage by combining electric enhanced biological membrane |
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