| Title: | Effect of oil concentration and residence time on the biodegradation of alpha-pinene vapours in two-liquid phase suspended-growth bioreactors |
| Author(s): | Montes M; Veiga MC; Kennes C; |
| Address: | "Chemical Engineering Laboratory, Faculty of Sciences, University of La Coruna, Rua da Fraga, 10, 15008-La Coruna, Spain" |
| DOI: | 10.1016/j.jbiotec.2011.07.019 |
| ISSN/ISBN: | 1873-4863 (Electronic) 0168-1656 (Linking) |
| Abstract: | "Recently, research on the use of binary aqueous-organic liquid phase systems for the treatment of polluted air has significantly increased. This paper reports the removal of alpha-pinene from a waste air stream in a continuous stirred tank bioreactor (CSTB), using either a single-liquid aqueous phase or a mixed aqueous-organic liquid phase. The influence of gas flow rate, load and pollutant concentration was evaluated as well as the effect of the organic to aqueous phase ratio. Continuous experiments were carried out at different inlet alpha-pinene concentrations, ranging between 0.03 and 25.1 g m(-)(3) and at four different flow rates, corresponding to residence times (RTs) of 120 s, 60 s, 36 s and 26 s. The maximum elimination capacities (ECs) reached in the CSTB were 382 g m(-)(3) h(-)(1) (without silicone oil) and 608 g m(-)(3) h(-)(1) (with 5%v/v silicone oil), corresponding to a 1.6-fold improvement using an aqueous-organic liquid phase. During shock-loads experiments, the performance and stability of the CSTB were enhanced with 5% silicone oil, quickly recovering almost 100% removal efficiency (RE), when pre-shock conditions were restored. The addition of silicone oil acted as a buffer for high alpha-pinene loads, showing a more stable behaviour in the case of two-liquid-phase systems" |
| Keywords: | "Batch Cell Culture Techniques Bicyclic Monoterpenes Biodegradation, Environmental/drug effects Biomass Bioreactors/*microbiology Carbon Dioxide/analysis Monoterpenes/*metabolism Phase Transition/*drug effects Silicone Oils/*pharmacology Time Factors Volat;" |
| Notes: | "MedlineMontes, Maria Veiga, Maria C Kennes, Christian eng Research Support, Non-U.S. Gov't Netherlands 2011/08/03 J Biotechnol. 2012 Feb 20; 157(4):554-63. doi: 10.1016/j.jbiotec.2011.07.019. Epub 2011 Jul 22" |
