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Method for separating and removing tetracycline antibiotics from livestock/poultry culture wastewater

A technology of livestock and poultry breeding wastewater and tetracyclines, which is applied in the field of water pollution control and resource regeneration, and can solve problems that endanger human body and ecosystem health

Inactive Publication Date: 2016-05-25
INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when livestock and poultry wastewater is used as a resource to irrigate crops, antibiotics may accumulate in the chain of "soil-crop-human body", thus endangering the health of human body and ecosystem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0007] A pig wastewater, initial pH value 7.2, suspended particulate matter 645mg / L, tetracycline 300μg / L, NH 4 + and PO 4 3- The concentrations were 560mg / L and 73mg / L respectively. First add 100mM NaCl, then drop 1+1 HCl to adjust the pH of the solution to 3, stir thoroughly for 30min (200rpm), and then let it stand for precipitation. The supernatant after precipitation was taken, and the content of tetracycline in the supernatant was determined to be 11 μg / L, and the separation rate of tetracycline from wastewater reached 96.3%.

Embodiment 2

[0009] A cattle wastewater, initial pH value 7.3, suspended solids 400mg / L, tetracycline 2mg / L, NH 4 + and PO 4 3- The concentrations were 1080mg / L and 69mg / L respectively. First add 200mM NaCl, then drop 1+1HNO 3 The pH of the solution was adjusted to 2, stirred thoroughly for 50min (150rpm), and then left to stand for centrifugal filtration. Take the filtered supernatant and measure the concentration of tetracycline in the supernatant. After testing, the content of tetracycline in the wastewater is 20 μg / L, and the separation rate of tetracycline from the wastewater reaches 99%.

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PUM

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Abstract

The invention relates to a method for separating and removing tetracycline antibiotics from livestock / poultry culture wastewater, particularly a method for lowering tetracycline antibiotic ecological environment risks in the livestock / poultry culture wastewater recycling process, belonging to the field of water pollution control and resource regeneration. The method is characterized by comprising the following steps: adding about 10-100mM of strong electrolytes (NaCl, MgCl2, MgSO4 and salt brine) into the wastewater to increase the ion concentration in the solution; adding acids (hydrochloric acid, nitric acid and sulfuric acid) to regulate the pH value of the wastewater to 1-5, sufficiently stirring to promote destabilization, aggregation and settling of suspended particulate matters and soluble organic matters in the wastewater, and carrying out solid-liquid separation, thereby separating the tetracycline antibiotics from the wastewater. The suspended particulate matters and soluble organic matters in the wastewater are removed, thereby achieving the goal of separating the tetracycline antibiotics, and lowering the antibiotic pollution risks in the livestock / poultry culture wastewater recycling process.

Description

technical field [0001] The invention belongs to the field of water pollution control and resource regeneration, and relates to a method for reducing the pollution risk of tetracycline antibiotics during resource utilization of livestock and poultry breeding wastewater. Background technique [0002] With the rapid development of my country's large-scale livestock and poultry breeding industry, the pollution of livestock and poultry wastewater to the surrounding environment has become increasingly serious, and it has become a major source of agricultural non-point source pollution. At the same time, phosphorus, as an essential resource in daily life and social development, is non-renewable. At present, the global phosphate rock reserves are rapidly decreasing, and it is of urgent strategic significance to realize the recovery and utilization of phosphorus. Magnesium ammonium phosphate (MgNH 4 PO 4 ·6H 2 O, MAP) method to recover phosphorus from wastewater is currently the ...

Claims

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Application Information

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IPC IPC(8): C02F9/04C02F103/20
CPCC02F9/00C02F1/001C02F1/38C02F1/52C02F1/66C02F1/68C02F2103/20
Inventor 叶志隆楼耀尹陈少华
Owner INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
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