Method for degrading antibiotics in livestock farm wastewater by aid of ultraviolet irradiation processes

A technology of farms and antibiotics, applied in the field of environmental pollution restoration, can solve problems such as harsh treatment conditions, long purification time, and large energy consumption, and achieve the effects of low degradation cost, fast degradation speed, and wide sources

Inactive Publication Date: 2019-02-19
陈先锐
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Chinese patent CN201210011270.3 discloses the application of a kind of ground fruit to purify livestock and poultry breeding biogas slurry. Planting ground fruit in the environment polluted by livestock and poultry breeding biogas slurry solves the pollution problem of biogas slurry, but the purification time is long, and the planting of plants is affected by the environment. Influenced by climate, environmental adaptation is required for application in other places; patent CN201410185329.X discloses a pretreatment method for removing antibiotics from fermented antibiotics pharmaceutical wastewater. Antibiotics in wastewater, but the treatment conditions are harsh, a large amount of energy is consumed during treatment, and the treatment cost is high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] (1) Drain the wastewater from the farm to the indoor reservoir, measure the pH value of the wastewater, and adjust the pH value of the biogas slurry to 7.0~7.6 with 10% sodium hydroxide solution and / or 10% dilute sulfuric acid solution;

[0029] (2) Add 50mL of Prodenweiss rettiri cultured for 3 days and 100mL of Bacillus subtilis cultured for 3 days into the reservoir, then start the stirring device and keep stirring at 100r / min for 2 days ;

[0030] (3) Add 15g of sodium persulfate and 10g of ferrous sulfate to each cubic meter of wastewater, irradiate the water body with 200nm ultraviolet light, and keep stirring, the stirring speed is 100r / min, and the ultraviolet irradiation time is 30min;

[0031] (4) Add Tris-HCl solution to the wastewater, the addition amount is 200mL / m 3 , continue to use 320nm ultraviolet light for ultraviolet irradiation, continue to stir, the stirring speed is 400r / min, and the ultraviolet irradiation time is 60min.

Embodiment 2

[0033] (1) Drain the wastewater from the farm to the indoor reservoir, measure the pH value of the wastewater, and adjust the pH value of the biogas slurry to 7.0~7.6 with 10% sodium hydroxide solution and / or 10% dilute sulfuric acid solution;

[0034] (2) Add 150mL of the five-day-cultivated Prodenweiss rettweiler bacteria solution and 200mL of the five-day-cultured Bacillus subtilis bacteria solution into the reservoir, then start the stirring device and keep stirring at 100r / min for 2 days ;

[0035] (3) Add 25g of potassium persulfate and 22g of ferrous sulfate to each cubic meter of wastewater, irradiate the water body with 400nm ultraviolet light, and keep stirring, the stirring speed is 400r / min, and the ultraviolet irradiation time is 90min;

[0036] (4) Add Tris-HCl solution to the wastewater, the addition amount is 350mL / m 3 , continue to use 400nm ultraviolet light for ultraviolet irradiation, continue to stir, the stirring speed is 100r / min, and the ultraviolet ir...

Embodiment 3

[0038] (1) Drain the wastewater from the farm to the indoor reservoir, measure the pH value of the wastewater, and adjust the pH value of the biogas slurry to 7.0~7.6 with 10% sodium hydroxide solution and / or 10% dilute sulfuric acid solution;

[0039] (2) Add 100mL of Prodenweis rettweiler cultured for 4 days and 100mL of Bacillus subtilis cultured for 3 days into the reservoir, then start the stirring device and keep stirring at 100r / min for 2 days ;

[0040] (3) Add 18g of ammonium persulfate and 20g of ferrous sulfate to each cubic meter of wastewater, irradiate the water body with 300nm ultraviolet light, and keep stirring, the stirring speed is 300r / min, and the ultraviolet irradiation time is 60min;

[0041] (4) Add Tris-HCl solution to the wastewater, the addition amount is 250mL / m 3 , continue to use 380nm ultraviolet light for ultraviolet irradiation, continue to stir, the stirring speed is 300r / min, and the ultraviolet irradiation time is 100min.

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PUM

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Abstract

The invention discloses a method for degrading antibiotics in livestock farm wastewater by the aid of ultraviolet irradiation processes. The method includes regulating a pH (potential of hydrogen) value of the livestock farm wastewater by acid and alkali solution; adding Providencia rettgeri solution and bacillus subtilis solution and preliminarily degrading the antibiotics; adding persulfate andferrous sulfate, forming advanced oxidation systems and then starting ultraviolet irradiation; carrying out oxidation/light degradation and continuing to degrade the antibiotics in biogas slurry; adding Tris-HCl solution and recycling the advanced oxidation systems; carrying out secondary oxidation/light degradation and degrading the antibiotics. The method has the advantages that the antibioticsin the wastewater can be degraded by the aid of technologies, and the method is high in degradation speed and degradation efficiency; good degradation effects can be realized, the antibiotics can be degraded into small-molecular substances, materials used in degradation procedures are low in cost and can come from extensive sources, and the antibiotics in the wastewater can be effectively degraded.

Description

technical field [0001] The invention belongs to the technical field of environmental pollution restoration, and in particular relates to a method for degrading antibiotics in farm wastewater by using an ultraviolet irradiation method. Background technique [0002] With the vigorous development of intensive farming, veterinary antibiotics have become an indispensable part of modern agriculture and breeding. However, antibiotics cannot be completely absorbed after passing through the intestines of animals, and most of them will be excreted in feces and urine in the form of prototypes or metabolites, resulting in a large accumulation of antibiotics in farm wastewater. At present, antibiotics widely used in livestock and poultry farming include quinolones, polypeptides, tetracyclines, macrolides, sulfonamides, and aminoglycosides. Due to the complex structure, difficult biodegradation and good water solubility of these antibiotics, they are easy to store and accumulate in the e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14
CPCC02F9/00C02F1/32C02F1/66C02F1/725C02F3/32C02F2305/02
Inventor 陈先锐
Owner 陈先锐
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