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Method for removing antibiotics from turtle aquaculture wastewater

A technology for breeding wastewater and antibiotics, applied in chemical instruments and methods, animal husbandry wastewater treatment, water/sewage multi-stage treatment, etc., can solve problems such as ignoring the removal of antibiotics

Active Publication Date: 2015-12-23
HUZHOU TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This program only focuses on the removal effect of high-concentration organic matter and nitrogen and phosphorus nutrients, but ignores the removal of antibiotics in wastewater

Method used

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  • Method for removing antibiotics from turtle aquaculture wastewater
  • Method for removing antibiotics from turtle aquaculture wastewater
  • Method for removing antibiotics from turtle aquaculture wastewater

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The raw water for the experiment was taken from a medium-sized turtle farm in Nanxun District, Huzhou, Zhejiang. The daily displacement of the farm reached 100 tons. During the breeding process, two antibiotics, chloramphenicol and erythromycin, were mainly used. The test was carried out directly with turtle breeding wastewater (without dilution treatment). The operating parameters of each treatment unit are as follows: (1) The treatment time of the primary sedimentation tank is 2-4 hours; (2) The sludge residence time of the DMBR device is 3 days, the water temperature is 23-25°C, the pH value remains neutral, and the intermittent aeration and intermittent time are 2 hours, the treatment time is 18-42h; (3) The treatment time of the secondary sedimentation tank is 3-6h; (4) The wavelength of the ultraviolet irradiation device is 254nm, and the light intensity is 2.0-2.5mW / cm 2 , the treatment time is 1-2h; (5) 2% (mass concentration) of sodium alginate as the embedding...

Embodiment 2

[0023] The raw water in Example 1 is injected into the treatment system, and the operating parameters of each unit of the treatment system are adjusted as follows: (1) The treatment time of the primary sedimentation tank is 4-6h; (2) The sludge residence time of the DMBR device is 3 days, and the water temperature is 20-23°C , the pH value remains neutral, intermittent aeration, the intermittent time is 2 hours, and the treatment time is 42-60h; (3) The treatment time of the secondary sedimentation tank is 6-10h; (4) The wavelength of the ultraviolet irradiation device is 254nm, and the light intensity is 1.5-2.0 mW / cm 2 , the treatment time is 2-3h; (5) 2% (mass concentration) of sodium alginate as the embedding agent in the immobilized algae pool, 2% (mass concentration) of cross-linking agent calcium chloride, and the fixed chlorella adopts (4.0± 0.3)×10 7 cell / ml, the water temperature is 23-25°C, the pH value remains neutral, and the treatment time is 42-60h. The proces...

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Abstract

The invention relates to a method for removing antibiotics from turtle aquaculture wastewater. The method comprises the following steps: (1), the aquaculture wastewater is subjected to primary settling in a primary settling tank; (2), the aquaculture wastewater from the primary settling tank is introduced into a dynamic membrane bioreactor for treatment; (3) the aquaculture wastewater treated by the dynamic membrane bioreactor is irradiated by ultraviolet, wherein working parameters of an ultraviolet irradiation device are as follows: the wavelength is 254 nm, the illumination intensity is 1.5-2.5 mW / cm<2>, and the treatment time is 1-3 h; (4), the aquaculture wastewater after ultraviolet irradiation is introduced into an immobilized alga tank, working parameters of the immobilization alga tank are as follows: the mass concentration of an embedding medium, namely sodium alginate, is 2%, the mass concentration of a cross-linking agent, namely calcium chloride, is 2%, the concentration of immobilized chlorella is (4.0 + / -0.3)*10<7> cell / ml, the water temperature is 20-25 DEG C, pH value keeps neutral, and the treatment time is 18-60 h. According to the method, the nitrogen and phosphorus removal rate is higher than 90.9%, and the antibiotic removal rate is higher than 92.6%.

Description

technical field [0001] The invention belongs to the technical field of aquaculture wastewater treatment, in particular to a method for removing antibiotics in turtle aquaculture wastewater. Background technique [0002] Antibiotics for soft-shelled turtles mainly refer to antibiotics used in the turtle breeding industry to treat diseases, sterilize bacteria, and promote growth. At present, the use of antibiotics for soft-shelled turtles is very large. According to statistics, around the world, about 70% of the total output of antibiotics is used in the breeding industry every year. In my country, the average annual consumption of antibiotics used in animal production has reached more than 6,000 tons, while half of the antibiotics used in the United States are used for animal production. Aquaculture. Studies have found that antibiotics cannot be completely absorbed and utilized by animals after they enter the animal body, and the accumulation and consumption in the body are ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/20
Inventor 吴湘吴昊叶金云罗秋斌
Owner HUZHOU TEACHERS COLLEGE
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