Changes of the reactor performance and the properties of granular sludge under tetracycline (TC) stress
| Autor: | Xin-Hua Wang, Yijing Shi, Shu-Guang Wang, Su-Fang Xing |
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| Rok vydání: | 2013 |
| Předmět: |
Time Factors
Environmental Engineering Static Electricity Bioengineering Microbial Sensitivity Tests Polysaccharide Fluorescence spectroscopy chemistry.chemical_compound Biopolymers Bioreactors Extracellular polymeric substance Stress Physiological Water Quality Spectroscopy Fourier Transform Infrared Oxidizing agent Ammonium Particle Size Nitrite Waste Management and Disposal chemistry.chemical_classification Chromatography Quenching (fluorescence) Bacteria Sewage biology Renewable Energy Sustainability and the Environment General Medicine Tetracycline biology.organism_classification Spectrometry Fluorescence chemistry |
| Zdroj: | Bioresource Technology. 139:170-175 |
| ISSN: | 0960-8524 |
| DOI: | 10.1016/j.biortech.2013.03.037 |
| Popis: | In this study, the response of nitrifying granules (NG) and conventional granules (CG) to tetracycline (TC) was compared. The presence of TC made granules break down into small fractions and led to nitrite accumulation in nitrifying system; while it had little toxic effect on CG system. Specific oxygen uptake rate tests showed 3.3% inhibition of ammonium oxidizing bacteria and 25.7% inhibition of nitrite oxidizing bacteria in the NG system. Granules produced more extracellular polymeric substances (EPS) to protect themselves from the TC stress, with higher production of proteins compared to polysaccharides. FTIR data also revealed significant changes of protein functional groups, while only small changes in polysaccharides functional groups were found. Three dimensional excitation-emission matrix fluorescence spectroscopy showed a decrease of peak intensity, indicating quenching effect of TC on EPS fluorescence, and also a blue shift of peak position, indicating chemical changes of EPS components. |
| Databáze: | OpenAIRE |
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