RT info:eu-repo/semantics/article
T1 Simultaneous methane abatement and PHB production by Methylocystis hirsuta in a novel gas-recycling bubble column bioreactor
A1 García Pérez, Teresa
A1 López, Juan Carlos
A1 Passos, Fabiana
A1 Lebrero Fernández, Raquel
A1 Revah, Sergio
A1 Muñoz Torre, Raúl
K1 Tratamiento biológico de gases
K1 Gases de efecto invernadero
K1 Biological gas treatment
K1 Greenhouse gas
AB The limited gas–liquid mass transfer represents the main challenge in the operation of cost-effective bioreactors devoted to the treatment of poorly soluble gas pollutants such as methane (CH4). This study evaluates the influence of internal gas-recycling strategies on the enhancement of CH4 abatement in a bubble column bioreactor inoculated with the methanotroph Methylocystis hirsuta. Maximum CH4 removal efficiencies of 72.9 ± 0.5% (corresponding to elimination capacities of 35.2 ± 0.4 g m−3 h−1) were recorded under process operation at an empty bed residence time of 30 min and 0.50 m3gas m−3reactor min−1 of internal gas-recycling rate. The accumulation of poly-3-hydroxybutyrate (PHB) in M. hirsuta was evaluated batchwise under limitations of potassium, manganese, nitrogen, and nitrogen with excess of iron. Nitrogen starvation resulted in the highest PHB content (28 ± 1%). Likewise, the implementation of sequential N starvation cycles in a continuous bubble column reactor operated at a gas residence time of 30 min and an internal gas-recycling rate of 0.50 m3gas m−3reactor min−1 supported a PHB content of up to 34.6 ± 2.5%, with a volumetric PHB productivity of 1.4 ± 0.4 kg m−3 d−1 and elimination capacities of 16.2 ± 9.5 g m−3 h−1.
PB Elsevier
SN 1385-8947
YR 2018
FD 2018
LK http://uvadoc.uva.es/handle/10324/30104
UL http://uvadoc.uva.es/handle/10324/30104
LA eng
NO Chemical Engineering Journal, Volume 334, 2018, Pages 691-697
NO Producción Científica
DS UVaDOC
RD 29-abr-2024