Hydrocarbon recovery and biocompatibility of solvents for extraction from cultures of Botryococcus braunii

@article{Frenz1989HydrocarbonRA,
  title={Hydrocarbon recovery and biocompatibility of solvents for extraction from cultures of Botryococcus braunii},
  author={J Frenz and Claude Largeau and Eliette Casadevall and Finn Kollerup and Andrew J. Daugulis},
  journal={Biotechnology and Bioengineering},
  year={1989},
  volume={34}
}
Various water‐immiscible solvents were tested for biocompatibility and hydrocarbon recovery under different contact conditions with the hydrocarbon‐rich microalga Botryococcus braunii. Eighteen solvents were first selected from a database of 1500 compounds (compiled for solvent selection for ethanol recovery from Saccharomyces cerevisiae fermentation). Nine of these candidate solvents were shown to be biocompatible with B. braunii following short contact times. This biocompatibility tends to be… Expand
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References

SHOWING 1-10 OF 20 REFERENCES
Optimization of organic solvent in multiphase biocatalysis
TLDR
The microbial epoxidation of propene and 1‐butene was used to study some fundamental aspects of two‐liquid‐phase biocatalytic conversions and high activity retention was favored by a low polarity in combination with a high molecular weight. Expand
Production of ethanol by immobilized Saccharomyces bayanus in an extractive fermentation system
TLDR
An extractive fermentation system using immobilized yeast cells was developed to study the ethanol production at high sugar concentrations and in situ recovery of ethanol by oleic acid in a batch immobilized cell system led to higher ethanol productivities and to the fermentation of 400 g/L, when an oleIC acid/medium ratio of 5 was used. Expand
Ethanol production by extractive fermentation – solvent identification and prototype development
The in situ removal and recovery of inhibitory fermentation products by solvent extraction has numerous beneficial effects (increased reaction rate, fermentation of concentrated feeds, decreasedExpand
Screening and identification of extractive fermentation solvents using a database
The ethanol fermentation has been studied as a model system for end product inhibition and extractive fermentation. Examination has been done on the basis of theoretical considerations, as well asExpand
Ethanol production by extractive fermentation
TLDR
Extension of this method is possible to any microbial production inhibited by its metabolite excretion because of the inhibitory effect of primary aliphatic alcohols of different chain lengths. Expand
Alkadiene- and botryococcene-producing races of wild strains of Botryococcus braunii
TLDR
In laboratory culture, the hydrocarbon content of these new strains is very high, from 30 to 60% of the dry biomass, for the two races the greatest hydrocarbon productivity takes place during the active growth phase. Expand
Resistant biopolymer in the outer walls of Botryococcus braunii, B race
TLDR
A biopolymer highly resistant to non-oxidative treatments (PRB B) occurs in the outer walls of the B race of Botryococcus braunii; however, the structural information obtained indicate it does not derive from carotenoids. Expand
Studies on batch and continuous cultures of Botryococcus braunii: Hydrocarbon production in relation to physiological state, cell ultrastructure, and phosphate nutrition
TLDR
The growth of the hydrocarbon‐rich alga Botryococcus braunii was studied under “air‐lift” conditions using batch and continuous cultures and the main features of phosphate nutrition in B.braunii and its effects on hydrocarbons were examined. Expand
Biosynthesis of triterpenoid hydrocarbons in the B-race of the green alga Botryococcus braunii. Sites of production and nature of the methylating agent
TLDR
Sequential extraction of hydrocarbons with solvents showed that botryococcenes accumulate in two distinct sites: externally in the successive outer walls forming a dense matrix and internally, probably in cyctoplasmic inclusions. Expand
Steroid conversions by Flavobacterium dehydrogenans in two‐liquid‐phase systems
TLDR
A very high degree of conversion can be reached in the two‐liquid‐phase system [more than 98% (w/w)] which cannot be obtained in an aqueous medium, and an easy way to recover the product in high purity is proposed. Expand
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