Format

Send to

Choose Destination
J Hazard Mater. 2015 Apr 28;287:412-20. doi: 10.1016/j.jhazmat.2015.01.069. Epub 2015 Feb 2.

Microbubble enhanced ozonation process for advanced treatment of wastewater produced in acrylic fiber manufacturing industry.

Author information

1
Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China. Electronic address: skytal_03@sina.com.
2
Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China; Beijing Key Laboratory on Resource-oriented Treatment of Industrial Pollutants, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China. Electronic address: wangqh59@sina.com.
3
Water Desalination and Reuse Center, King Abdullah University of Science and Technology, Thuwal 4700, Saudi Arabia. Electronic address: tao.zhang@kaust.edu.sa.
4
School of Earth and Environmental Sciences, The University of Adelaide, South Australia 5005, Australia. Electronic address: zhining.shi.career@gmail.com.
5
Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China. Electronic address: tianli5921@126.com.
6
Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China. Electronic address: shishanshan727@gmail.com.
7
School of Earth and Environmental Sciences, The University of Adelaide, South Australia 5005, Australia. Electronic address: NSmale@bionicsinstitute.org.
8
Department of Environmental Engineering, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China. Electronic address: pizi0909@163.com.

Abstract

This work investigated microbubble-ozonation for the treatment of a refractory wet-spun acrylic fiber wastewater in comparison to macrobubble-ozonation. CODcr, NH3-N, and UV254 of the wastewater were removed by 42%, 21%, and 42%, respectively in the microbubble-ozonation, being 25%, 9%, and 35% higher than the removal rates achieved by macrobubble-ozonation at the same ozone dose. The microbubbles (with average diameter of 45μm) had a high concentration of 3.9×10(5) counts/mL at a gas flow rate of 0.5L/min. The gas holdup, total ozone mass-transfer coefficient, and average ozone utilization efficiency in the microbubble-ozonation were 6.6, 2.2, and 1.5 times higher than those of the macrobubble-ozonation. Greater generation of hydroxyl radicals and a higher zeta potential of the bubbles were also observed in the microbubble ozonation process. The biodegradability of the wastewater was also significantly improved by microbubble-ozonation, which was ascribed to the enhanced degradation of alkanes, aromatic compounds, and the many other bio-refractory organic compounds in the wastewater. Microbubble-ozonation can thus be a more effective treatment process than traditional macrobubble-ozonation for refractory wastewater produced by the acrylic fiber manufacturing industry.

KEYWORDS:

Acrylic fiber manufacturing wastewater; Advanced treatment; Macrobubble-ozonation; Microbubble-ozonation

PMID:
25681716
DOI:
10.1016/j.jhazmat.2015.01.069
[Indexed for MEDLINE]

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center