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Method for effectively reducing content of antibiotics in livestock and poultry manure

A technology of livestock and poultry manure and antibiotics, applied in chemical instruments and methods, animal husbandry, water pollutants, etc., can solve problems such as different degradation mechanisms and paths, large differences in antibiotic structures, and complicated microscopic reaction processes, so as to prevent Environmental hazards and threats to human safety, the effect of simple operation and easy control

Inactive Publication Date: 2018-06-12
厦门康浩生态农业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Different types of antibiotics have large structural differences, and their degradation mechanisms and pathways are different. Although the near-critical water oxidation process seems simple, the microscopic reaction process is extremely complex.
Even a single organic compound will form a variety of intermediate products in the process of near-critical water oxidation, and the reaction mechanism of these intermediate products is quite complicated.

Method used

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  • Method for effectively reducing content of antibiotics in livestock and poultry manure
  • Method for effectively reducing content of antibiotics in livestock and poultry manure
  • Method for effectively reducing content of antibiotics in livestock and poultry manure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] Embodiment 1: reduce the method for antibiotic in manure of livestock and poultry

[0023] Experiment 1: Put livestock and poultry manure with a water content of 80% into a near-critical hydrolysis reactor at a temperature of 200°C and a pressure of 1.8Mpa, and maintain the pressure for 20 minutes to release the pressure and discharge the material. The content of antibiotics in the material can be degraded by 85%. above.

[0024] Experiment 2: Put livestock and poultry manure with a water content of 83% into a near-critical hydrolysis reactor at a temperature of 250°C and a pressure of 2.4Mpa, and maintain the pressure for 20 minutes to release the pressure and discharge the material. The content of antibiotics in the material can be degraded by 85%. above.

[0025] Experiment 3: Put livestock and poultry manure with a water content of 86% into a near-critical hydrolysis reactor at a temperature of 280°C and a pressure of 3.0Mpa, and maintain the pressure for 30 minute...

Embodiment 2

[0029] Example 2: Degradation experiments of livestock and poultry manure with different concentrations of antibiotics under high temperature and high pressure conditions

[0030] Put livestock and poultry manure with a water content of 80% into a near-critical hydrolysis reactor, the temperature is 200°C, the pressure is 1.8Mpa, and the pressure is maintained for more than 20 minutes.

[0031] The experimental results of the degradation experiments of different concentrations of antibiotics under high temperature and high pressure conditions are shown in Table 1.

[0032] The pig manure provided by Xiamen Tongan Pig Farm contains pig manure with low concentration of antibiotics; a certain amount of veterinary drug antibiotics is added to the pig manure with low concentration of antibiotics to prepare pig manure with high concentration.

[0033] Table 1 The degradation results of different concentrations of antibiotics under the same treatment conditions (μg / kg)

[0034]

[...

Embodiment 3

[0036] Embodiment 3: Effect experiment of different temperature and pressure treatment on antibiotic degradation and removal rate

[0037] The process steps are the same as in Example 1, and the different treatment temperatures are shown in Table 1 and Table 2. The experimental conditions of the three treatment groups were 0.1Mpa at 100°C; 1.9Mpa at 200°C; 3.8Mpa at 300°C; the time for maintaining the pressure was 20min.

[0038] Processed samples: Pig manure provided by Xiamen Tongan Pig Farm.

[0039] Table 2 The impact of different temperature treatments on the degradation of antibiotics

[0040]

[0041] As can be seen from Table 2, when the temperature is greater than 200°C (i.e. 200°C and 300°C) after treatment, the content of tetracyclines: oxytetracycline is 0, which is far lower than that before treatment (116.77) and 100°C (48.07 ) treatment; tetracycline content (200°C-14.5 and 300°C-5.07) was also much lower than before treatment (104.49) and 100°C (28.66).

...

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Abstract

The invention discloses a method for effectively reducing content of antibiotics in livestock and poultry manure. Specifically, the livestock and poultry manure is thrown into a critical hydrolysis reaction kettle, wherein the temperature is greater than or equal to 200 DEG C and the pressure is greater than or equal to 1.8 MPa; the pressure is maintained for over 20 minutes, then the pressure isrelieved, and a material is discharged. The method disclosed by the invention is safe and reliable; the content of the antibiotics in the livestock and poultry manure is reduced with high removal rate.

Description

technical field [0001] The invention relates to the field of reducing antibiotics, in particular to a method for reducing the content of antibiotics in livestock and poultry manure. Background technique [0002] At present, there are several thousand kinds of antibiotics, which are mainly divided into two types: human use and agricultural use. In agriculture, antibiotics can be added to feed, and are often used in the treatment of livestock and poultry diseases, food additives for fish, growth promoters for livestock and poultry, etc. In 2013, China used a total of 162,000 tons of antibiotics, of which more than 50% were used in livestock and poultry farming. However, most antibiotics cannot be completely absorbed by livestock and poultry, and about 45% to 95% are excreted with livestock and poultry feces and urine, and enter the environment such as soil and water, posing a huge threat to environmental ecology and human health. Therefore, in livestock and poultry farming, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F11/06C05F3/00A23K50/00A23K10/26C02F101/30C02F103/20
CPCC02F1/72C02F11/06C02F2101/30C02F2103/20C02F2209/02C02F2209/03C05F3/00Y02A40/20
Inventor 康永松高秋芬林开发
Owner 厦门康浩生态农业有限公司
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