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
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[0046] Example 1
[0047] The breeding 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 intake air volume is 2.5L / min, so that the oxygen active fragment concentration generated by the ·OH generator 11 is 166.2mg / L. Then, after the aquaculture water is pretreated by the microfilter 3, the foam separator 4 and the biological reaction tank 5, 1 / 10 of the amount of water flows into the ·OH generator 1, and is fully mixed with the gas containing oxygen active fragments to prepare a high concentration of hydroxyl radicals. The main oxygen radical solution, the high-concentration oxygen radical solution prepared is then fed into the jet 61 and the liquid-liquid miscible device 7 through the pipeline, and the total oxidant concentration after the liquid-liquid miscibility is controlled by adjusting the gas-liquid ratio to 1.0 ±0.2mg / L, complete the purpose of water purification an...
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[0051] Example 2
[0052] The combined system is used to breed pearl gentian grouper. Before breeding, the fish bodies are screened to control the average weight of the fish bodies to 60 g, and the daily feeding amount is 1% of the body weight. Feeding time is 16:00 every day, continuous feeding for 7 days, daily water change is 30%, water quality physical and chemical indicators: 25~27℃, pH value 7.6~8.0, dissolved oxygen 7.8~9.0, salinity 26.0~27.0‰. According to water quality control, a 0.5mg / L concentration of hydroxyl radical solution was used to treat the circulating aquaculture seawater for 1 hour every day, and the treatment volume was 20t / h. After 30 days, the weight and length of the fish were randomly measured, and the fish growth indicators were calculated.
[0053] The effect of hydroxyl radical solution on fish growth indicators is 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 ...
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