Treatment of substituted phenol mixtures in single phase and two-phase solid–liquid partitioning bioreactors

Towards a continuous two-phase partitioning bioreactor for xenobiotic removal

“…The self-regulating nature of substrate uptake and metabolic-driven substrate release characterizing their operation has been successfully demonstrated for hydrocarbons [3], substituted phenols [4], PCBs [5] and PAHs [6]. TPPB operation in the treatment of aqueous contaminants has mainly focused on batch and fed batch operation, and granular commercial polymers typically in the form of beads have been employed as the solid partitioning phase.…”

Enhanced Crude Oil Biodegradation in a Two-liquid Phase Partitioning Bioreactor

“…The partition process itself is controlled to some extent by the metabolic activity of microorganisms. The system is well suited for biodegradation of hazardous pollutants 6,7 . The idea of a two- The biodegradation of crude oil at relatively high concentrations in an aquatic environment is constrained by the inherent toxicity of crude oil.…”

“…Tomei et al 7 compared the performance of a TPPB, relative to single phase operation, in which a small volume (5 %, v/v) of the beads polymer Hytrel 8206 was used to treat aqueous mixtures of 2,4-dimethylphenol and 4-nitrophenol. Zuniga et al 9 studied the biodegradation of methane, and the accumulation of poly-hydroxybutyrate using a methanotrophic consortium and an isolated strain in a TPPB.…”

Biodegradation of Endocrine Disruptors in Solid-Liquid Two-Phase Partitioning Systems by Enrichment Cultures

“…After concentration in the water-immiscible phase, these substances gradually diffuse to the aqueous phase, in which degrading microorganisms metabolize these molecules at various rates (14)(15)(16). Solid polymers, such as Hytrel, polystyrene butadiene, and poly(ethylene-covinyl acetate), have been used efficiently as immiscible phase in solid-liquid TPPBs for the biodegradation of aromatic compounds, such as mono-and polycyclic aromatic hydrocarbons (PAHs), polychlorinated biphenyls (PCBs), and phenolic compounds (16)(17)(18)(19)(20)(21)(22)(23)(24), for the transformation of carveol to carvone (25), and for the production of microbial metabolites (26)(27)(28).…”

“…Furthermore, consortia can more readily adapt to environment changes or variations in bioprocess operating conditions (32)(33)(34). Microbial consortia were used for the degradation of PAHs, phenolic compounds, and benzene, toluene, ethylbenzene, and xylene (BTEX) in solid-liquid TPPBs (19,20,22,24,33,(35)(36)(37)(38)(39). However, the biodegradation adaptations of these consortia were performed in the absence of the immiscible phase.…”