کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4997214 | 1459905 | 2017 | 9 صفحه PDF | دانلود رایگان |
- Nitritation and biodegradation of 2-fluorophenol were achieved in granular reactor.
- Stable aerobic granules were maintained 135Â days in a sequencing batch reactor.
- 2-Fluorophenol feeding decreased the species richness.
- The microbial community changed by treating 2-fluorophenol.
- Aerobic granular reactors are a promising technology for industrial wastewaters.
An aerobic granular bioreactor was operated for over 4 months, treating a synthetic wastewater with a high ammonium content (100 mg N Lâ1). The inoculum was collected from a bioreactor performing simultaneous partial nitrification and aromatic compounds biodegradation. From day-56 onwards, 2-fluorophenol (2-FP) (12.4 mg Lâ1) was added to the feeding wastewater and the system was bioaugmented with a 2-FP degrading bacteria (Rhodococcus sp. FP1). By the end of operation, complete 2-FP biodegradation and partial nitrification were simultaneously achieved. Aerobic granules remained stable over time. During the 2-FP loading, a shift in the community structure occurred, coinciding with the improvement of 2-FP degradation. DGGE analysis did not allow to infer on the bioaugmented strain presence but pyrosequencing analysis detected Rhodococcus genus by the end of operation. Together with other potential phenolic-degraders within granules, these microorganisms were probably responsible for 2-FP degradation.
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Journal: Bioresource Technology - Volume 238, August 2017, Pages 232-240