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Method for treating antibiotics in livestock and poultry breeding sewage

A technology for livestock and poultry breeding and antibiotics, which is applied in filtration treatment, sedimentation treatment, water/sewage treatment, etc., and can solve problems such as excessive chroma, ineffective removal of antibiotics, and enhanced bacterial resistance

Pending Publication Date: 2021-03-09
INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The large-scale treatment of antibiotic wastewater at home and abroad is still dominated by biological methods. In order to increase the treatment effect, CASS, MBR and other processes have been developed on the basis of traditional biological methods. Although the wastewater treatment effect has been greatly improved, due to The problem of a large amount of refractory biodegradable substances in the wastewater has not been solved, so the treated effluent still cannot meet the discharge standards, mainly in the excess of COD and chroma
In addition, the residual antibiotics in the wastewater cannot be effectively removed, and the concentration level discharged into the environment is as high as mg / L. These residual antibiotics will lead to the enhancement of bacterial resistance in the environment, thereby posing a potential threat to human health

Method used

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  • Method for treating antibiotics in livestock and poultry breeding sewage

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 Research on PF+UF+NF+RO composite membrane system

[0024] Taking the pig farm biogas slurry produced by a large-scale pig farm manure treatment center in Hebei Province as the research object, paper tape filtration, hollow fiber ultrafiltration membrane pretreatment of pig farm biogas slurry and nanofiltration membrane reverse osmosis membrane concentration treatment were carried out. Research, including PF+UF pretreatment pig farm biogas slurry operation parameter optimization test, and PF+UF+NF+RO combined process operation test.

[0025] The preferred accuracy of PF is 50μm, the preferred working pressure of UF is 0.10MPa, and the automatic backwash frequency is 20min. Under the operating conditions of optimal process parameters, the flux of the UF pretreatment permeate membrane gradually decreased, and partially recovered after automatic backwashing. The volume transmittance was 86.67±0.62%, and the turbidity, TSS, TS, and COD The removal rates were 89.6...

Embodiment 2

[0031] Embodiment 2 Activated carbon, halloysite or the influence of photocatalytic treatment on antibiotics in the filtrate of different treatment links

[0032] The aureomycin in the hollow permeate is completely removed.

[0033]Activated carbon can completely remove 3 kinds of antibiotics (fleroxacin, danofloxacin, ofloxacin) in the hollow permeate, the lowest removal rate of orbifloxacin is about 53%, and the average removal rate of 10 kinds of antibiotics is about It was 89%, and the total antibiotic concentration after treatment was about 15ng / mL; fine halloysite can completely remove 7 kinds of antibiotics (fleroxacin, sparfloxacin, orbifloxacin, enrofloxacin, daroxacin) in the hollow permeate liquid. Flufloxacin, ciprofloxacin, ofloxacin), the lowest removal rate of sarafloxacin is about 94%, the average removal rate of 10 antibiotics is about 99%, and the total antibiotic concentration after treatment is about 3.6 ng / mL; Coarse halloysite can completely remove two ...

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Abstract

The invention discloses a method for treating antibiotics in livestock and poultry breeding sewage. The method comprises the following steps: 1, concentrating livestock and poultry breeding sewage through a combined membrane concentration system; and 2, treating the effluent concentrated in the step 1 with activated carbon, halloysite or a photocatalytic material. According to the invention, a combined membrane concentration system is concentrated and then is used for removing antibiotics in aquaculture wastewater with activated carbon, halloysite or a photocatalytic material, so that the treatment process flow is short, the operation is simple, and the treatment cost is low.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a method for treating antibiotics in livestock and poultry breeding sewage. Background technique [0002] According to statistics, my country's livestock and poultry farming currently produces 3.8 billion tons of feces every year, equivalent to 14.23 million tons of nitrogen and 2.46 million tons of phosphorus, and the comprehensive utilization rate is about 70%. The resource utilization of livestock and poultry waste still needs to be further promoted. Biogas and bio-natural gas are the main treatment directions for livestock and poultry waste treatment. However, due to the problems of large volume, low nutrient concentration, and high transportation costs, the biogas slurry produced by biogas treatment is easy to cause secondary pollution and cause a series of environmental problems. How to realize the reduction, harmlessness, and recycling of liquids, including sewage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/02C02F9/08C02F101/34C02F101/36C02F101/38
CPCC02F9/00C02F1/001C02F1/441C02F1/442C02F1/444C02F2001/007C02F1/32C02F2305/10C02F1/283C02F2101/34C02F2101/38C02F2101/36
Inventor 尹福斌董红敏张万钦占源航
Owner INST OF ENVIRONMENT & SUSTAINABLE DEV IN AGRI CHINESE ACADEMY OF AGRI SCI
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