CLC number: X52
On-line Access: 2024-08-27
Received: 2023-10-17
Revision Accepted: 2024-05-08
Crosschecked: 2009-10-15
Cited: 5
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Hong-zi ZHANG, Xu-wei LONG, Ru-yi SHA, Guo-liang ZHANG, Qin MENG. Biotreatment of oily wastewater by rhamnolipids in aerated active sludge system[J]. Journal of Zhejiang University Science B, 2009, 10(11): 852-859.
@article{title="Biotreatment of oily wastewater by rhamnolipids in aerated active sludge system",
author="Hong-zi ZHANG, Xu-wei LONG, Ru-yi SHA, Guo-liang ZHANG, Qin MENG",
journal="Journal of Zhejiang University Science B",
volume="10",
number="11",
pages="852-859",
year="2009",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.B0920122"
}
%0 Journal Article
%T Biotreatment of oily wastewater by rhamnolipids in aerated active sludge system
%A Hong-zi ZHANG
%A Xu-wei LONG
%A Ru-yi SHA
%A Guo-liang ZHANG
%A Qin MENG
%J Journal of Zhejiang University SCIENCE B
%V 10
%N 11
%P 852-859
%@ 1673-1581
%D 2009
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.B0920122
TY - JOUR
T1 - Biotreatment of oily wastewater by rhamnolipids in aerated active sludge system
A1 - Hong-zi ZHANG
A1 - Xu-wei LONG
A1 - Ru-yi SHA
A1 - Guo-liang ZHANG
A1 - Qin MENG
J0 - Journal of Zhejiang University Science B
VL - 10
IS - 11
SP - 852
EP - 859
%@ 1673-1581
Y1 - 2009
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.B0920122
Abstract: oily wastewater generated by various industries creates a major ecological problem throughout the world. The traditional methods for the oily wastewater treatment are inefficient and costly. Surfactants can promote the biodegradation of petroleum hydrocarbons by dispersing oil into aqueous environment. In the present study, we applied rhamnolipid-containing cell-free culture broth to enhance the biodegradation of crude oil and lubricating oil in a conventional aerobically-activated sludge system. At 20 °C, rhamnolipids (11.2 mg/L) increased the removal efficiency of crude oil from 17.7% (in the absence of rhamnolipids) to 63%. At 25 °C, the removal efficiency of crude oil was over 80% with the presence of rhamnolipids compared with 22.3% in the absence of rhamnolipids. Similarly, rhamnolipid treatment (22.5 mg/L) for 24 h at 20 °C significantly increased the removal rate of lubricating oil to 92% compared with 24% in the absence of rhamnolipids. The enhanced removal of hydrocarbons was mainly attributed to the improved solubility and the reduced interfacial tension by rhamnolipids. We conclude that a direct application of the crude rhamnolipid solution from cell culture is effective and economic in removing oily contaminants from wastewater.
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