Enzymatic tranformations of lignin. Annual report 1 July 1980-30 June 1981

Technical Report · Mon Jun 01 00:00:00 EDT 1981

OSTI ID:5135591

Glasser, W G; Hall, P L

Research is summarized on biological approaches to the utilization of lignin degradation to raw material for the manufacture of chemicals and materials. This investigation studied the possible involvement of reduced oxygen species produced by the white-rot fungus, C. versicolor, in the initial breakdown of the lignin macromolecule during its biodegradation. This fungus was shown to be capable of exporting superoxide radical. While the degree to which this organism was responsible for actual lignin degradation is not clear, there were indications that a correlation may exist between the concentration of extracellular superoxide radical in the medium and the extent of lignin degradation. Two different fermentation schemes were compared and several control fermentation experiments were made. Research dealing with improvements in lignin structure analysis, liquefaction of lignin preparations by reaction with propylene oxide, and solidification of liquified kraft lignin by crosslinking with diisocyanate compounds was explored. The use of scanning electron microscopy for revealing interaction between fiber and binder is noted.

• Research Organization: Virginia Polytechnic Inst. and State Univ., Blacksburg (USA)
• OSTI ID: 5135591
• Report Number(s): PB-82-171489
• Country of Publication: United States
• Language: English

Related Subjects

09 BIOMASS FUELS
LIGNIN
BIODEGRADATION
CELLULOSE
ENZYMES
FERMENTATION
FUNGI
GAS CHROMATOGRAPHY
LIQUEFACTION
MICROORGANISMS
SULFATES
BIOCONVERSION
CARBOHYDRATES
CHEMICAL REACTIONS
CHROMATOGRAPHY
DECOMPOSITION
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PLANTS
POLYSACCHARIDES
SACCHARIDES
SEPARATION PROCESSES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
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