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Combined system of treating industrial circulating aquaculture water with hydroxyl radical (.OH)

A technology of recirculating breeding and combined system, which is applied in water/sewage treatment, animal husbandry wastewater treatment, oxidized water/sewage treatment, etc. It can solve the problems of high treatment cost, access, and small treatment capacity, so as to improve the growth environment and increase the Survival rate, effect of consumption reduction

Inactive Publication Date: 2017-07-25
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, less than 30% of antibiotics can be absorbed by animals, and the current aquaculture wastewater treatment process can hardly degrade antibiotics. Therefore, a large amount of antibiotics are discharged into the soil and water with the aquaculture wastewater
However, most of these methods are still on the laboratory scale, and various problems will inevitably occur when dealing with actual wastewater.
From the method category, the Fenton oxidation method requires the use of larger doses of hydrogen peroxide and Fe 2+ Catalyst, not only the treatment cost is high, but also the treatment capacity is small; the ozone oxidation method has no significant effect on the removal of complex organic matter, and may cause the generation of intermediate pollutants; The situation has higher requirements (otherwise it is easy to shorten the life of the catalyst); the electrolytic oxidation method has higher energy consumption, so the treatment cost is often too high

Method used

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  • Combined system of treating industrial circulating aquaculture water with hydroxyl radical (.OH)
  • Combined system of treating industrial circulating aquaculture water with hydroxyl radical (.OH)
  • Combined system of treating industrial circulating aquaculture water with hydroxyl radical (.OH)

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] The aquaculture circulating water is taken from a pearl gentian grouper farm. According to the water quality to be treated, the discharge power is adjusted to 280W, O 2 The air intake rate is 2.5 L / min, so that the concentration of oxygen active fragments generated by the ·OH generator 11 is 166.2 mg / L. Then after the culture water is pretreated by the microfilter 3, the foam separator 4 and the bioreactor 5, 1 / 10 of the water flow into the OH generating device 1 is fully mixed with the gas containing oxygen active fragments to prepare high-concentration hydroxyl radicals Based on the oxygen free radical solution, the prepared high-concentration oxygen free radical solution enters the jet device 61 and the liquid-liquid miscible device 7 through the pipeline, and the total oxidant concentration after the liquid-liquid miscibility is controlled to be 1.0 by adjusting the gas-liquid ratio ±0.2mg / L, to complete the purpose of water purification and sterilization.

[0048]...

Embodiment 2

[0052] The pearl gentian grouper is cultured by using the combined system. Before breeding, the fish body is screened, the average body weight of the fish body is controlled to 60 g, and the daily feeding amount is 1% of the body weight. The feeding time is 16:00 every afternoon, and the feeding is continuous for 7 days. The daily water change is 30%. According to the water quality control, use 0.5mg / L hydroxyl radical solution to treat the circulating cultured seawater for 1 hour, and the treatment capacity is 20t / h. After 30 days, randomly measure the weight and body length of the fish, and calculate the growth index of the fish.

[0053] The effects of hydroxyl radical solution on fish growth indicators are shown in Table 2. It can be seen from Table 2 that the hydroxyl radical solution with a concentration of 0.5mg / L can effectively improve the growth environment of farmed fish, and its survival rate has increased by 13.3% compared with conventional culture, and it can als...

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Abstract

The invention provides a combined system of treating industrial circulating aquaculture water with hydroxyl radical (.OH). The system is provided with a .OH generation device, a culture pool, a microfilter, a foam separator, a biological reaction pool, a jet device, a liquid-liquid mixing device, a gas-liquid separator, and a liquid mixing device. A water outlet of the culture pool is connected with a seawater supplementing pipeline. The seawater supplementing pipeline is connected with a water inlet of the microfilter. A water outlet of the microfilter is connected with a water inlet of the foam separator. A water outlet of the foam separator is connected with a water inlet of the biological reaction pool and the liquid mixing device. A water outlet of the biological reaction pool is connected with the jet device on a circulating water pipeline and a water inlet of the .OH generation device. A water outlet of the .OH generation device is connected with the jet device. An outlet of the jet device is connected with the liquid-liquid mixing device. A water outlet of the liquid-liquid mixing device is connected with a water inlet of the gas-liquid separator. A water outlet of the gas-liquid separator is connected with a water inlet of the culture pool and the liquid mixing device.

Description

technical field [0001] The invention relates to the fields of plasma chemistry, aquaculture technology, marine environment engineering technology and the like, in particular to a combined system for treating industrialized circulating aquaculture water by hydroxyl radicals. Background technique [0002] With the development of our country's economy, people's demand for seafood is gradually increasing. Only relying on traditional marine fishing is far from meeting the market demand, and the marine fish farming industry has developed rapidly. The industrialized recirculating aquaculture has been paid more and more attention and applied because of its advantages of no pollution, water saving, strong controllability and high efficiency. The core issue of industrialized recirculating aquaculture is the regulation and treatment of aquaculture water and the prevention and control of diseases. The pollutants in aquaculture water mainly come from the metabolism of aquatic organisms, ...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/20
CPCC02F9/00C02F1/444C02F1/72C02F3/30C02F2103/20
Inventor 白敏冬黄晓典艾春香贺霄
Owner XIAMEN UNIV
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