Documents disponibles écrits par cet auteur

Control of Re - startup of anaerobic USBF reactors after short stops / Carlos García-Diéguez in Industrial & engineering chemistry research, Vol. 49 N° 10 (Mai 2010) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4748–4755 Titre : Control of Re - startup of anaerobic USBF reactors after short stops Type de document : texte imprimé Auteurs : Carlos García-Diéguez, Auteur ; Francisco Molina, Auteur ; Eugenio Fernández, Auteur Année de publication : 2010 Article en page(s) : pp. 4748–4755 Note générale : Industrial chemistry Langues : Anglais (eng) Mots-clés : Anaerobic  wastewater  treatment Résumé : In this work, a previously developed variable gain controller (VGC) was applied for automatic control of re-startup and an organic overload in an anaerobic wastewater treatment (AWT) plant treating winery wastewater. The experiments for testing the automatic re-startup, and later organic overload, were conducted at 37 ± 2 °C in a hybrid upflow sludge bed-filter (USBF) pilot-scale reactor fully monitored with a liquid volume of 1.15 m3. The validation of the system was performed by simulation with Anaerobic Digestion Model No. 1 (ADM1) and experimentally by closed-loop control of the USBF reactor. It was determined that the time required for the re-startup of the AWT plant after short programmed stop periods (one month) could be greatly reduced, in comparison with the manual procedure, using this control system (only two days are needed). The organic-loading rate reached a value of 12 kg COD/(m3 d), with an initial chemical oxygen demand (COD) concentration in the influent of 8 kg COD/m3. To test the controller for the management of an organic overload, a COD increase of a 50% was applied. The control system decreased the feed flow rate and allowed process stability to be recovered after the organic overload. One of the advantages of this controller is its suitability for maintaining a high effluent quality by controlling H2 concentration in the biogas. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901164t [article] Control of Re - startup of anaerobic USBF reactors after short stops [texte imprimé] / Carlos García-Diéguez, Auteur ; Francisco Molina, Auteur ; Eugenio Fernández, Auteur . - 2010 . - pp. 4748–4755. Industrial chemistry Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 49 N° 10 (Mai 2010) . - pp. 4748–4755 Mots-clés : Anaerobic  wastewater  treatment Résumé : In this work, a previously developed variable gain controller (VGC) was applied for automatic control of re-startup and an organic overload in an anaerobic wastewater treatment (AWT) plant treating winery wastewater. The experiments for testing the automatic re-startup, and later organic overload, were conducted at 37 ± 2 °C in a hybrid upflow sludge bed-filter (USBF) pilot-scale reactor fully monitored with a liquid volume of 1.15 m3. The validation of the system was performed by simulation with Anaerobic Digestion Model No. 1 (ADM1) and experimentally by closed-loop control of the USBF reactor. It was determined that the time required for the re-startup of the AWT plant after short programmed stop periods (one month) could be greatly reduced, in comparison with the manual procedure, using this control system (only two days are needed). The organic-loading rate reached a value of 12 kg COD/(m3 d), with an initial chemical oxygen demand (COD) concentration in the influent of 8 kg COD/m3. To test the controller for the management of an organic overload, a COD increase of a 50% was applied. The control system decreased the feed flow rate and allowed process stability to be recovered after the organic overload. One of the advantages of this controller is its suitability for maintaining a high effluent quality by controlling H2 concentration in the biogas. ISSN : 0888-5885 En ligne : http://pubs.acs.org/doi/abs/10.1021/ie901164t