RT info:eu-repo/semantics/article
T1 Optimization of nitrogen feeding strategies for improving polyhydroxybutyrate production from biogas by Methylocystis parvus OBBP in a stirred tank reactor
A1 Rodríguez Muñoz, Yadira
A1 García, Silvia María
A1 Pérez Fernández, Rebeca
A1 Lebrero Fernández, Raquel
A1 Muñoz Torre, Raúl
K1 Bioplastics
K1 Bioplásticos
K1 Biorefinery
K1 Biorrefinería
K1 Methylocystis parvus
AB The design of efficient cultivation strategies to produce bioplastics from biogas is crucial for the implementation of this biorefinery process. In this work, biogas-based polyhydroxybutyrate (PHB) production and CH4 biodegradation performance was investigated for the first time in a stirred tank bioreactor inoculated with Methylocystis parvus OBBP. Decreasing nitrogen loading rates in continuous mode and alternating feast:famine regimes of 24 h-cycles, and alternating feast:famine regimes of 24 h:24 h and 24 h:48 h were tested. Continuous N feeding did not support an effective PHB production despite the occurrence of nitrogen limiting conditions. Feast-famine cycles of 24 h:24 h (with 50% stoichiometric nitrogen supply) supported the maximum PHB production (20 g-PHB m−3 d−1) without compromising the CH4-elimination capacity (25 g m−3 h−1) of the system. Feast:famine ratios ≤1:2 entailed the deterioration of process performance at stoichiometric nitrogen inputs ≤60%.
PB Elsevier
SN 0045-6535
YR 2022
FD 2022
LK https://uvadoc.uva.es/handle/10324/52740
UL https://uvadoc.uva.es/handle/10324/52740
LA eng
NO Chemosphere, 2022, vol. 299, 134443
NO Producción Científica
DS UVaDOC
RD 25-abr-2024