LIGNIN-DECOMPOSITION MICROBIAL STRAIN HAVING HIGH ACTIVITY AND SELECTIVITY

摘要

PURPOSE:To enable the utilization of microorganism to a wood-utilizing industries, by using a newly screened novel lignin-decomposition microbial strain NK-729W having high lignin-decomposition activity and capable of selectively decomposing lignin. CONSTITUTION:A novel lignin-decomposition microbial strain NK-729W (FERM P-9385) belonging to Porodisculus pendulous is inoculated in a medium such as potato-glucose agar medium containing a woody raw material and is incubated at an optimum temperature of 20-30 deg.C or thereabout while keeping the pH of the medium to about 4-5. The NK-729W strain has exceedingly high lignin-decomposition activity and lignin-selectivity and, accordingly, it is especially suitable for a mass-production using a large-sized tank and the treating time can be shortened. Since a delicate operation is not necessary in wood- saccharification industry, etc., the process is especially suited for industrial use. It can be advantageously applied to a field for utilizing a cellulosic biomass such as wood or to a paper and pulp manufacturing process. The present invention is the first process to enable the industrial use of lignin decomposition.