期刊
JOURNAL OF ENVIRONMENTAL SCIENCES
卷 24, 期 9, 页码 1594-1599出版社
SCIENCE PRESS
DOI: 10.1016/S1001-0742(11)60973-X
关键词
aerobic sludge; Achromobacter sp S-3; biodegradation; sulfamethazine
资金
- National Natural Science Foundation of China [21007010]
- Research Fund for the Doctoral Program of Higher Education of China [20090075120007]
- Shanghai Committee of Science and Technology [09230500200]
- Fundamental Research Funds for the Central Universities [2011D11309]
- Chinese Transportation Ministry and Hunan Province for Science and Technology Development [2010-353-343-290]
- Chinese Academy of Sciences [KZCX2 -YW-Q02-02, KZCX2-YW-BR-19]
- Project of Transportation Department of Hunan Province [200908]
Removal characteristics of sulfamethazine (SMZ) by sludge and a bacterial strain using an aerobic sequence batch reactor (ASBR) were studied. Operating conditions were optimized by varying the reaction time and sludge retention time (SRT). An Achromobacter sp. (S-3) with the ability to remove SMZ was isolated from the ASBR. The effects of different operating parameters (pH and temperature) on the biodegradation of SMZ by S-3 were determined. The results indicate that, between 0.5 and 4 hr, reaction time of the ASBR had a significant effect on the SMZ removal efficiency in the system. The SMZ removal efficiency also increased from 45% to 80% when SRT was prolonged from 5 to 25 days, although longer SRT had no impact on SMZ removal. The SMZ adsorption rate decreased with increasing temperature, which fitted Freundlich isotherm well. The removal of SMZ in the ASBR was due to the combined effects of adsorption and degradation, and degradation played a leading role.
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