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Contemporary Problems of Ecology

2004 year, number 2

Biodegradation of the Hydrolysis Lignin by Microbial Association

S.A. MEDVEDEVA, E.L. IMRANOVA, I.V. VOLCHATOVA, TEN KhAK MUN

Abstract

It is established that solid-phase fermentation of the hydrolysis lignin with the participation of microorganisms results at first in the accumulation of low-molecular compounds soluble in dioxan, and then simple water-soluble aromatic compounds. It is revealed that the destruction of lignin occurs under the action of ligninolytic fungi due to the cleavage of the benzene ring, C—O—C and C—C bonds, which causes functionalization of the remaining lignin and the formation of low-molecular compounds: oxy- and dicarboxylic, phenolic and fatty acids, which are not toxic for plant growth.
It is shown that the decomposition of the hydrolysis lignin proceeds consecutively and more efficiently under the action of microbial association than with the participation of one of the most active ligninolytic cultures. An artificial association is considered as a consortium and the basis for compost starter.