期刊
APPLIED MICROBIOLOGY AND BIOTECHNOLOGY
卷 100, 期 5, 页码 2417-2427出版社
SPRINGER
DOI: 10.1007/s00253-015-7120-1
关键词
Anammox; Swine wastewater; Heavy metal inhibition; Antibiotic inhibition; Sludge characteristics
资金
- National Key Technologies R&D Program of China [2012BAC13B02]
- Public Welfare Project of Science Technology Department of Zhejiang Province
- Xinmiao Talent Program of Zhejiang Province [2015R423074]
- Xingguang Program of Hangzhou Normal University
The feasibility of the anaerobic ammonium oxidation (anammox) process to treat synthetic swine wastewater containing antibiotics and heavy metals was studied in this work. Nitrogen removal performance and granule characteristics were tracked by continuous-flow monitoring to evaluate the long-term joint effects of Cu and Zn and of Cu and oxytetracycline (OTC). Cu and Zn with a joint loading rate (JLR) of 0.04 kg m(-3) day(-1) did not affect the performance, while a JLR of 0.12 kgm(-3) day(-1) caused a rapid collapse in performance. Cu and OTC addition with a JLR of 0.04 kg m(-3) day(-1) for approximately 2 weeks induced significant nitrite accumulation. Granule characteristic analysis elucidated the disparate inhibition mechanisms of heavy metals and antibiotics: the internalization of heavy metals caused metabolic disorders, whereas OTC functioned as a growth retarder. However, anammox reactors could adapt to a JLR of 0.04 kg m(-3) day(-1) via self-regulation during the acclimatization to subinhibitory concentrations, which had a stable nitrogen removal rate (>8.5 kg m(-3) day(-1)) and removal rate efficiency (>75 %) for reactors with Cu-OTC addition. Therefore, this study supports the great potential of using anammox granules to treat swine wastewater.
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