Method of removing sulfanilamide antibacterials and COD (chemical oxygen demand) from livestock breeding waste water by using micron zero-valent ferrum-activated persulfate

A technology for livestock and poultry breeding wastewater and activated persulfate, which is applied in chemical instruments and methods, animal husbandry wastewater treatment, oxidized water/sewage treatment, etc. High cost and other issues, to achieve the effect of shortening the processing time, prolonging the service life and simple operation

Inactive Publication Date: 2017-10-27
SUZHOU UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the large external energy required by the photocatalytic method and the complexity of the heating system of the thermocatalytic method, the use of transition metal ions as catalysts has a good effect on degrading pollutants, but some metal ions will cause secondary pollution to the environment. Ions (Fe 2+ ) reacts with persulfate to generate Although the efficiency is faster, it is reduced The utilization rate of the catalyst is short, the utilization rate is low, the treatment cost is high, and the time is long, which is not conducive to the long-lasting, efficient and rapid removal of sulfonamide antibacterial drugs and COD in livestock and poultry wastewater

Method used

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  • Method of removing sulfanilamide antibacterials and COD (chemical oxygen demand) from livestock breeding waste water by using micron zero-valent ferrum-activated persulfate
  • Method of removing sulfanilamide antibacterials and COD (chemical oxygen demand) from livestock breeding waste water by using micron zero-valent ferrum-activated persulfate
  • Method of removing sulfanilamide antibacterials and COD (chemical oxygen demand) from livestock breeding waste water by using micron zero-valent ferrum-activated persulfate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Get 1.875ml of the prepared sodium persulfate solution (0.4mol / L) and add it into 93.125ml of livestock and poultry breeding wastewater with pH=5, place it in a water bath oscillator and shake evenly under the condition of 180rpm, add 5ml of SM2 (1mmol / L L) solution. Vibrating and reacting at room temperature for 30 minutes, the removal of antibiotics in livestock and poultry wastewater by using the persulfate solution alone is completed. Such as figure 1 Shown: without adding any catalyst, the degradation rate of SM2 in livestock and poultry wastewater within 30min is 0.8%; under the situation of adding micron zero-valent iron powder, the degradation rate of SM2 in livestock and poultry wastewater in 30min tends to be Close to 0; in the case of adding persulfate, the degradation rate of SM2 in livestock and poultry wastewater within 30min is 10.5%; in the case of adding persulfate and micron zero-valent iron powder at the same time, the degradation rate of SM2 is 100%...

Embodiment 2

[0028] Add 1.875ml of the prepared sodium persulfate solution (0.4mol / L) and 10mg, 25mg, 50mg, 100mg, 300mg of micron zero-valent iron powder into 93.125ml of livestock and poultry breeding wastewater with pH=5, and place The water bath shaker was shaken evenly under the condition of 180rpm, and 5ml of SM2 (1mmol / L) solution was added. Shaking and reacting at room temperature for 20 minutes, the removal of sulfamethazine SM2 by using persulfate solution and different dosages of micron zero-valent iron is completed. Such as figure 2 As shown, the removal rates of SM2 in this example reached 87.12%, 100%, 76.72%, 57.8%, and 35.8%, respectively.

Embodiment 3

[0030]Take 1.875ml of the prepared sodium persulfate solution (0.4mol / L) and 25mg of micron zero-valent iron powder and add them to 93.125ml of livestock and poultry breeding wastewater with pH=3, pH=5, pH=7, and pH=9 respectively , placed in a water-bath shaker at 180rpm to shake evenly, and added 5ml of SM2 (1mmol / L) solution. Shaking and reacting at room temperature for 20 minutes, the removal of antibiotics in livestock and poultry wastewater by using persulfate solution and micron zero-valent iron powder under different pH conditions is completed. Such as image 3 Shown, the removal rate of SM2 in 20min is 83.97%, 100%, 4.23%, 5.60% in this example.

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Abstract

The invention discloses a method of removing sulfanilamide antibacterials and a COD (chemical oxygen demand) from livestock breeding waste water by using micron zero-valent ferrum-activated persulfate. The method comprises the steps of adding 0.007-0.008mol/L persulfate and 0.2-0.3g/L micron zero-valent ferrum, uniformly stirring, and keeping pH (potential of hydrogen) of a reaction system to be 4.5-5.5 for reaction, wherein a mole ratio of micron zero-valent ferrum to persulfate is 1:(1.40-2.10). The method overcomes the disadvantages of a too high reaction rate, a low utilization ratio and the like of a metal ion catalyst, can quickly, efficiently and persistently remove the sulfanilamide antibacterials and the waste water COD from the livestock breeding waste water; reaction conditions are mild; the treatment time is greatly shortened; the technical cost is lowered; and the method has wide application prospects in degradation and removal of the sulfanilamides antibacterials and the COD in the livestock breeding waste water.

Description

technical field [0001] The invention relates to a method for removing sulfonamide antibacterial drugs and COD in livestock and poultry breeding wastewater, in particular to a method for activating persulfate by using micron zero-valent iron to remove sulfonamide antibacterial drugs and COD in livestock and poultry breeding wastewater, belonging to Wastewater treatment technology field. Background technique [0002] Wastewater from livestock and poultry farming mainly consists of urine, residual feces, feed residues and flushing water, and some factory areas also include domestic wastewater generated during the production process. The main characteristics of livestock and poultry breeding wastewater are: high concentration of organic matter, high suspended solids, deep color, high ammonia nitrogen content, and a large number of bacteria. Field sampling of the basic indicators of farm wastewater: COD (640 ~ 750mg / L) NH3-N (300mg / L). Due to the high COD and NH3-N in the waste...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/72C02F103/20C02F101/38
CPCC02F1/725C02F2101/38C02F2101/40C02F2103/20
Inventor 陈家斌黄天寅卢建
Owner SUZHOU UNIV OF SCI & TECH
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