Method for degrading antibiotics in biogas slurry by aid of ultraviolet irradiation processes

A technology of antibiotics and biogas slurry, which is applied in the field of environmental pollution restoration, can solve the problems of high treatment cost, harsh treatment conditions, and long purification time, and achieve the effects of low degradation cost, simple and easy degradation process, 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

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] (1) Drain the biogas slurry into the indoor reservoir, and add 200mL / m of Providencia rettgeri cultured for 3 days into the reservoir 3 , and then start the stirring device, stirring continuously at 100r / min for 2 days;

[0026] (2) Measure the pH value of the biogas slurry, and use 10% sodium hydroxide solution and / or 10% dilute sulfuric acid solution to adjust the pH value of the biogas slurry to 7.0~7.6;

[0027] (3) Add 14.2g sodium persulfate and 20g ferrous sulfate to each cubic biogas slurry, use 100nm ultraviolet light to irradiate the water body, and keep stirring, the stirring speed is 100r / min, and the ultraviolet irradiation time is 120min;

[0028] (4) Add 5mol / L dithiothreitol solution to the biogas slurry, the addition amount is 100mL / 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 120min.

Embodiment 2

[0030] (1) Drain the biogas slurry into the indoor reservoir, and add 500mL / m of Providencia rettgeri cultured for 5 days into the reservoir 3 , and then start the stirring device, stirring continuously for 1 day at 400r / min;

[0031] (2) Measure the pH value of the biogas slurry, and use 10% sodium hydroxide solution and / or 10% dilute sulfuric acid solution to adjust the pH value of the biogas slurry to 7.0~7.6;

[0032] (3) Add 20.0g potassium persulfate and 20g ferrous sulfate to each cubic biogas slurry, irradiate the water body with 320nm ultraviolet light, and keep stirring, the stirring speed is 400r / min, and the ultraviolet irradiation time is 60min;

[0033] (4) Add 5mol / L dithiothreitol solution to the biogas slurry, the addition amount is 400mL / m 3 , continue to use 400nm ultraviolet light for ultraviolet irradiation, continue to stir, the stirring speed is 100r / min, and the ultraviolet irradiation time is 30min.

Embodiment 3

[0035] (1) Drain the biogas slurry into the indoor reservoir, and add 300mL / m of Providencia rettii cultured for 4 days into the reservoir 3 , and then start the stirring device, stirring continuously for 2 days with 200r / min;

[0036] (2) Measure the pH value of the biogas slurry, and use 10% sodium hydroxide solution and / or 10% dilute sulfuric acid solution to adjust the pH value of the biogas slurry to 7.0~7.6;

[0037] (3) Add 15g ammonium persulfate and 20g ferrous sulfate to each cubic biogas slurry, irradiate the water body with 300nm ultraviolet light, and keep stirring, the stirring speed is 300r / min, and the ultraviolet irradiation time is 90min;

[0038] (4) Add 5mol / L dithiothreitol solution to the biogas slurry, the addition amount is 200mL / 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 biogas slurry by the aid of ultraviolet irradiation processes. The method includes adding Providencia rettgeri solution into the biogas slurry and preliminarily degrading the antibiotics; adding persulfate and ferrous sulfate, forming advanced oxidation systems and then starting ultraviolet irradiation; carrying out oxidation/light degradation and continuing to degrade the antibiotics in the biogas slurry; adding dithiothreitol solution and recycling the advanced oxidation systems; carrying out secondary oxidation/light degradationand degrading the antibiotics. The method has the advantages that the antibiotics in the biogas slurry 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 fromextensive sources, and the antibiotics in the biogas slurry 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 biogas slurry by means of ultraviolet irradiation. 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 animal intestines, 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 the biogas slurry of farms. 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 env...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F103/20
CPCC02F9/00C02F1/32C02F1/66C02F1/72C02F3/34C02F2103/20C02F2305/023
Inventor 陈先锐
Owner 陈先锐
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