Processes of liquefaction/solubilization of Spanish coals by microorganisms |
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| Authors: | F Laborda I F Monistrol N Luna M Fernández |
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| Institution: | (1) Departamento de Microbiología y Parasitología, Universidad de Alcalá, Crta. Madrid-Barcelona Km 33,6, E-28871, Alcalá de Henares Madrid, Spain e-mail: mplaborda@microb.alcala.es Tel./Fax: +34-91-88546 21, ES |
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| Abstract: | Several fundamental aspects of microbial coal liquefaction/solubilization were studied. The liquefied/solubilized products
from coal by microorganisms were analysed. The liquid products analysed by IR titration and UV/visible spectrometry showed
some alterations with regard to the original coal. Humic acids extracted from the liquefied lignite showed a reduction in
the average molecular weight and a increase in the condensation index, probably due to depolymerization caused by microorganisms.
The mechanisms implicated in coal biosolubilization by two fungal strains, M2 (Trichoderma sp.) and M4 (Penicillium sp.) were also studied. Extracellular peroxidase, esterase and phenoloxidase enzymes appear to be involved in coal solubilization.
Received: 15 June 1998 / Received revision: 23 November 1998 / Accepted: 29 November 1998 |
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