On-line monitoring of nitrate and nitrite by UV spectrophotometry in a SBR process used for the treatment of industrial wastewaters
2008
Bouvier, Jean-Claude | Bekri, Meriem | Mazouni, Djalel | Schoefs, Olivier | Harmand, Jérôme | Ribeiro, Thierry | Pham, Hoai Nam | Pauss, André | Laboratoire de Biotechnologie de l'Environnement [Narbonne] (LBE) ; Institut National de la Recherche Agronomique (INRA)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro) | Transformations Intégrées de la Matière Renouvelable (TIMR) ; Université de Technologie de Compiègne (UTC) | Institut Polytechnique LaSalle Beauvais
International audience
显示更多 [+] 显示较少 [-]英语. The objective is the adaptation of an existing UV spectrophotometer for the on-line monitoring of nitrate, nitrite and soluble COD during cycles of SBRs. An on-line filtering system was also developed in order to provide particle-free fluids to the sensor. The modified UV-spectrophotometer sensor (called "STAC") was implemented into a pilot-scale bioreactor at INRA-Narbonne, treating a semi-synthetic dairy wastewater. After a calibration and validation steps, results obtained during five months have shown that the on-line spectrophotometer sensor was able to efficiently monitor on-line nitrate, nitrite in SBR content. Ranges of detection were between 0 to 40 mg/L for nitrate and 0 to 18 mg/L for nitrite, with an accuracy of about 10%. The on-line estimation of soluble COD was less efficient. The major drawback was the time-consumption for the cleaning of the homemade on-line filter.
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