Search

Your search keyword '"A.C. Avella"' showing total 3 results
Start Over Author "A.C. Avella"
3 results on '"A.C. Avella"'

1. Activated sludge behaviour in a batch reactor in the presence of antibiotics: study of extracellular polymeric substances

Author

A.C. Avella, Marie-Noëlle Pons, Michel Manfait, Ganesh D. Sockalingum, P. De Donato, Tatiana Görner, Jean-Noël Louvet, Mohammed Essendoubi, Laboratoire Environnement et Minéralurgie (LEM), Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Unite Medicament Dynam Intracellulaire Architectu, CNRS, UFR Pharm, Centre National de la Recherche Scientifique (CNRS)-Université de Reims Champagne-Ardenne (URCA), Laboratoire des Sciences du Génie Chimique (LSGC), CPER Lorraine, Zone Atelier Moselle, Matrice extracellulaire et dynamique cellulaire - UMR 7369 (MEDyC), Université de Reims Champagne-Ardenne (URCA)-SFR CAP Santé (Champagne-Ardenne Picardie Santé), and Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Université de Reims Champagne-Ardenne (URCA)-Université de Picardie Jules Verne (UPJV)-Centre National de la Recherche Scientifique (CNRS)

Subjects
0106 biological sciences, Environmental Engineering, Spectrophotometry, Infrared, Sulfamethoxazole, PHARMACEUTICALS, Nitrogen, Polymers, Tetracycline, [SDV]Life Sciences [q-bio], Batch reactor, Erythromycin, 010501 environmental sciences, 01 natural sciences, Bioreactors, REMOVAL, Extracellular polymeric substance, WASTE-WATER, 010608 biotechnology, polycyclic compounds, Bioreactor, medicine, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, Water Science and Technology, Roxithromycin, Chromatography, Sewage, biology, [SDE.IE]Environmental Sciences/Environmental Engineering, Chemistry, EFFLUENT, Amoxicillin, biology.organism_classification, 6. Clean water, Anti-Bacterial Agents, PRODUCTS, AQUATIC ENVIRONMENT, Activated sludge, Spectrophotometry, BACTERIA, Chromatography, Gel, Bacteria, medicine.drug
Abstract

International audience; The influence of Erythromycin, Roxithromycin, Amoxicillin, Tetracycline and Sulfamethoxazole on municipal sludge in batch reactors was investigated. The study was focused on extracellular polymeric substances (EPS) as indicator of bacteria sensitivity to toxic agents. The EPS were analysed by UV-Vis and FT-IR spectroscopies and by size exclusion chromatography. It was found that Erythromycin and Roxithromycin induced a significant increase of bound EPS in flocs. This was attributed to a protection mechanism of the bacteria. Erythromycin was the only antibiotic which inhibited COD and nitrogen removal.

Published
2010

2. A combined approach for a better understanding of wastewater treatment plants operation: statistical analysis of monitoring database and sludge physico-chemical characterization

Author

A.C. Avella, P. Chappe, Jacques Yvon, Ph. de Donato, Tatiana Görner, and P. Guinot-Thomas

Subjects
Engineering, Environmental Engineering, computer.software_genre, Waste Disposal, Fluid, Settling, Statistical analysis, Waste Management and Disposal, Water Science and Technology, Civil and Structural Engineering, Principal Component Analysis, Microscopy, Confocal, Database, Waste management, Sewage, business.industry, Ecological Modeling, Paper mill, Pollution, Combined approach, Waste treatment, Activated sludge, Multivariate Analysis, Chromatography, Gel, Nitrification, Sewage treatment, business, computer
Abstract

Biological wastewater treatment plants (WWTP) are complex systems to assess. Many parameters are recorded daily in WWTP to monitor and control the treatment process, providing huge amounts of registered data. A combined approach of extracting information from the WWTP databases by statistical methods and from the sludge physico-chemical characterization was used here for a better understanding of the WWTP operation. The monitored parameters were analysed by multivariate statistical methods: Principal Components Analysis and multiple partial linear regression. The WWTP operational conditions determine the sludge characteristics. The bacterial activity of the sludge in terms of extra-cellular polymeric substances (EPS) production was assessed using size exclusion chromatography and the internal structure of sludge flocs was observed by confocal laser scanning microscopy. The diagnosis of three paper mill WWTP enabled the identification of an important EPS production, the presence of the nitrification process and the presence of PO43− nutrient in WWTP-A. These three main characteristics of WWTP-A were related with a systematically good sludge settling. In WWTP-B and C with bad settling, the bacterial activity was weak.

Published
2010

3. Effect of cytostatic drug presence on extracellular polymeric substances formation in municipal wastewater treated by membrane bioreactor

Author

Tatiana Görner, Ph. de Donato, Claire Albasi, M. Galmiche, A.C. Avella, L.F. Delgado, Centre National de la Recherche Scientifique - CNRS (FRANCE), Institut National Polytechnique de Lorraine - INPL (FRANCE), Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE), Université Toulouse III - Paul Sabatier - UT3 (FRANCE), Laboratoire Environnement et Minéralurgie (LEM), Institut National Polytechnique de Lorraine (INPL)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de génie chimique [ancien site de Basso-Cambo] (LGC), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), and Université Fédérale Toulouse Midi-Pyrénées

Subjects
Environmental Engineering, Polymers, [SDE.MCG]Environmental Sciences/Global Changes, Size-exclusion chromatography, Bioengineering, Antineoplastic Agents, 02 engineering and technology, 010501 environmental sciences, Membrane bioreactor, Polysaccharide, 01 natural sciences, Extracellular polymeric substances, Extracellular polymeric substance, Bioreactors, Size exclusion chromatography, Polysaccharides, Spectroscopy, Fourier Transform Infrared, Bioreactor, Extracellular, Génie chimique, [SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering, [SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces, environment, Waste Management and Disposal, ComputingMilieux_MISCELLANEOUS, 0105 earth and related environmental sciences, chemistry.chemical_classification, Ecologie, Environnement, Chromatography, Renewable Energy, Sustainability and the Environment, Membrane fouling, Membranes, Artificial, General Medicine, Anticancer drug, 021001 nanoscience & nanotechnology, 6. Clean water, Infrared and UV–Vis spectroscopy, Membrane, chemistry, 13. Climate action, Chromatography, Gel, Spectrophotometry, Ultraviolet, 0210 nano-technology, Water Pollutants, Chemical
Abstract

The effect of the cyclophosphamide and its mean metabolites on extracellular polymeric substances (EPS) formation was investigated. Two lab-scale membrane bioreactors were followed in parallel (one with the cytostatic drugs, the second without). Chromatographic and spectroscopic studies (UV–Vis spectroscopy and IR spectroscopy) showed that the presence of CPs induced an increase in EPS concentration in the biological sludge, especially of soluble substances, mainly polysaccharides and proteins. Size exclusion chromatography analysis revealed that in the presence of CPs, macromolecular EPS were formed (polysaccharides corresponding to about 6 KDa and proteins to about 18 KDa). The formation of EPS seemed to be a protection mechanism. More important membrane fouling in reactor with CPs seemed to be related to the retention of an increased amount of soluble substances.

Published
2009

Catalog

Books, media, physical & digital resources
See catalog results