Abstract

In order to use Synechocystis PCC 6803 as feedstock of nonpetroleum-based diesel fuel, pulsed electric field (PEF) technology was used for cell disruption prior to extraction of intracellular lipids. Severe cell disruption was evident after PEF treatment, especially with treatment intensity (TI) > 35 kWh/m3. Temperature increase during the treatment brought about most of the destruction of autofluorescence compounds, as well as a fraction of inactivation and the destruction of the plasma and thylakoid membranes. However, the forces associated with the pulsing electric field caused significant damage to the plasma membrane, cell wall, and thylakoid membrane, and it even led to complete disruption of some cells into fragments, which resulted in biomass loss. Treatment by PEF enhanced the potential for the low-toxicity solvent isopropanol to access lipid molecules during subsequent solvent extraction, leading to lower usage of isopropanol for the same extraction efficiency. Thus, PEF shows promise for lowering the costs and environmental effects of the lipid-extraction step.

Original languageEnglish (US)
Pages (from-to)3795-3802
Number of pages8
JournalEnvironmental Science and Technology
Volume45
Issue number8
DOIs
StatePublished - Apr 15 2011

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electric field
Electric fields
2-Propanol
lipid
membrane
Lipids
Membranes
plasma
Solvent extraction
Cell membranes
Diesel fuels
environmental effect
Feedstocks
Environmental impact
Toxicity
Biomass
Cells
evaluation
effect
toxicity

ASJC Scopus subject areas

  • Chemistry(all)
  • Environmental Chemistry

Cite this

Evaluation of cell-disruption effects of pulsed-electric-field treatment of Synechocystis PCC 6803. / Sheng, Jie; Vannela, Raveender; Rittmann, Bruce.

In: Environmental Science and Technology, Vol. 45, No. 8, 15.04.2011, p. 3795-3802.

Research output: Contribution to journalArticle

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abstract = "In order to use Synechocystis PCC 6803 as feedstock of nonpetroleum-based diesel fuel, pulsed electric field (PEF) technology was used for cell disruption prior to extraction of intracellular lipids. Severe cell disruption was evident after PEF treatment, especially with treatment intensity (TI) > 35 kWh/m3. Temperature increase during the treatment brought about most of the destruction of autofluorescence compounds, as well as a fraction of inactivation and the destruction of the plasma and thylakoid membranes. However, the forces associated with the pulsing electric field caused significant damage to the plasma membrane, cell wall, and thylakoid membrane, and it even led to complete disruption of some cells into fragments, which resulted in biomass loss. Treatment by PEF enhanced the potential for the low-toxicity solvent isopropanol to access lipid molecules during subsequent solvent extraction, leading to lower usage of isopropanol for the same extraction efficiency. Thus, PEF shows promise for lowering the costs and environmental effects of the lipid-extraction step.",
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