Method for removing quinolone micropollutants in residual activated sludge

A residual activity, quinolone technology, applied in the field of removal of quinolone micro-pollutants, can solve the problem that the removal effect of quinolone micro-pollutants has not been studied, and achieves low equipment and material costs, excellent addition amount, and enhanced decomposition effect. Effect

Inactive Publication Date: 2017-07-04
NINGBO UNIV
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the effect of birnessite on the removal of quinolone micropollutants in sludge has not been studied

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Method for removing quinolone micropollutants in residual activated sludge

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment one: if figure 1 As shown, a method for removing quinolone micro-pollutants in excess activated sludge, the concentration of quinolones micro-pollutants is 2276ng / g dry sludge, and the remaining activated sludge with a solid content of 0.5% is transported to the reactor, Regulate the pH of remaining activated sludge to be 7.0, then add granular birnessite in remaining activated sludge, in the mixture of remaining activated sludge and birnessite, the concentration of birnessite is 10mg / g dry sludge, Finally, stir evenly while heating to make the remaining activated sludge and birnessite undergo thermal hydrolysis reaction. The thermal hydrolysis temperature is controlled at 40°C. After reacting for 10 minutes, the concentration of quinolone micro-pollutants in the remaining activated sludge is measured to be 682ng / g dry sludge, in which the concentration of ciprofloxacin decreased from 889ng / g dry sludge to 228ng / g dry sludge, and the concentration of norflox...

Embodiment 2

[0024] Embodiment two: if figure 1 As shown, a method for removing quinolone micro-pollutants in excess activated sludge, the concentration of quinolones micro-pollutants is 1411ng / g dry sludge, and the remaining activated sludge with a solid content rate of 3.5% is transported to the reactor, Regulate the pH of remaining activated sludge to be 6.0, then add granular birnessite in remaining activated sludge, in the mixture of remaining activated sludge and birnessite, the concentration of birnessite is 30mg / g dry sludge, Finally, stir evenly while heating to make the remaining activated sludge and birnessite undergo thermal hydrolysis reaction. The thermal hydrolysis temperature is controlled at 50°C. After reacting for 30 minutes, the concentration of quinolone micro-pollutants in the remaining activated sludge is measured to be 318ng / g dry sludge, in which the concentration of ofloxacin decreased from 358ng / g dry sludge to 76ng / g dry sludge, and the concentration of norflox...

Embodiment 3

[0025] Embodiment three: as figure 1 As shown, a method for removing quinolone micro-pollutants in excess activated sludge, the concentration of quinolones micro-pollutants is 1869ng / g dry sludge, and the remaining activated sludge with a solid content rate of 7.7% is transported to the reactor, Regulate the pH of remaining activated sludge to be 4.0, then add granular birnessite in remaining activated sludge, in the mixture of remaining activated sludge and birnessite, the concentration of birnessite is 50mg / g dry sludge, Finally, stir evenly while heating to make the remaining activated sludge and birnessite undergo thermal hydrolysis reaction. The thermal hydrolysis temperature is controlled at 60°C. After reacting for 1 hour, the concentration of quinolone micro-pollutants in the remaining activated sludge is measured to be 261ng / g dry sludge, in which the concentration of ofloxacin decreased from 601ng / g dry sludge to 88ng / g dry sludge, and the concentration of ciproflox...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
solid contentaaaaaaaaaa
Login to view more

Abstract

The invention discloses a method for removing quinolone micropollutants in residual activated sludge. The method is characterized in that granular birnessite is added in the residual activated sludge, then the materials are stirred while being heat, residual activated sludge and the granular birnessite are subjected to a pyrohydrolysis reaction; the method has the advantages that high-activity oxide is generated by pyrohydrolysis of birnessite, quinolone micropollutants in residual activated sludge are subjected to efficient oxidative decomposition, and quinolone micropollutants concentration can be effectively reduced. The removal method employs combination of pyrohydrolysis and birnessite quinolone to process micropollutants in residual activated sludge, the residual activated sludge and birnessite are only added in a reaction still and heat to realize the process, equipment and material cost is low, and the removal effect is good.

Description

technical field [0001] The invention relates to a method for removing quinolone micro-pollutants, in particular to a method for removing quinolone micro-pollutants in excess activated sludge. Background technique [0002] Quinolones are a class of antibiotics widely used in the world, and their detection concentration and frequency in the environment are increasing due to their extensive use. These substances are persistent and have great potential harm to the ecological environment. Sewage treatment plants are one of the main routes through which quinolones enter the environment. The mainstream process of sewage treatment plants is the activated sludge method. Since quinolones are special antibacterial agents and are difficult to be biodegraded, they mainly enter the remaining activated sludge through adsorption and accumulate continuously as the remaining activated sludge stays. . As a result, a wide variety of quinolone micro-pollutants with high concentrations were en...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): C02F11/10C02F11/08C02F101/34C02F101/38
CPCC02F11/08C02F11/10C02F2101/34C02F2101/38
Inventor 于洁高豆豆黄吉利王侃程军蕊余振勋于旭彪郑琦宏郭敏辉
Owner NINGBO UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap