期刊
WATER RESEARCH
卷 170, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.watres.2019.115303
关键词
Biological wastewater treatment; Pharmaceutical wastewater; Ibuprofen removal; Biotransformation
资金
- Natural Science Foundation of China [51778643, 51922110]
- Science and Technology Program of Shenzhen [JSGG20170824101458515]
Ibuprofen (IBU), a common non-steroidal anti-inflammatory drug (NSAID), is widely used by humans for controlling fever and pain, and is frequently detected in the influent of wastewater treatment plants and different aquatic environments. In this study, the biotransformation of IBU in activated sludge (AS), anaerobic methanogenic sludge (AnMS) and sulfate-reducing bacteria (SRB)-enriched sludge systems was investigated at three different concentrations of 100, 500 and 1000 mu g/L via a series of batch and continuous studies. IBU at concentration of 100 mu g/L was effectively biodegraded by AS whereas AnMS and SRB-enriched sludge were less effective in IBU biodegradation at all concentrations tested. However, at higher IBU concentrations of 500 and 1000 mu g/L, AS showed poor IBU biodegradation and chemical oxygen demand (COD) removal due to inhibition of aerobic heterotrophic bacteria (i.e., Candidatus Competibacter) by IBU and/or IBU biotransformation products. The microbial analyses showed that IBU addition shifted the microbial community structure in AS, AnMS and SRB-enriched sludge systems, however, the removals of COD, nitrogen and sulfur in both anaerobic sludge systems were not affected significantly (p> 0.05). The findings of this study provided a new insight into biotransformation of IBU in three important biological sludge systems. (C) 2019 Elsevier Ltd. All rights reserved.
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