원문정보
초록
영어
The biodiesel industry has increased due to its eco-friendly and renewable alternative
biodiesel. Because 10 kg of biodiesel yields 1 kg of glycerol, the cost of crude glycerol is
rapidly decreased in the world market. There is a great advantage to use crude glycerol for the
useful chemical productions from economical and environmental standpoints. In this work,
Clostridium pasteurianum DSM 525, C. butyricum DSM 2477 and C. diolis DSM 15410 were
tested for the production of butanol and 1,3-propanediol (1,3-PD) with crude glycerol. Because
crude glycerol without pre-purification exhibited the inhibitory effect on the growth of the
tested Clostridium species, crude glycerol was treated with 5 N HCl to remove soap components
which are known as cell growth inhibitors. The color of crude glycerol was changed from dark
brown to light yellow after pretreatment. The growth of microorganisms was enhanced with the
pretreated crude glycerol and 4~5 g/L of 1,3-PD and 5~6 g/L of butanol were produced in the
pretreated crude, which were similar to those produced in pure glycerol (5 g/L). In conclusion,
the production of 1,3-PD and butanol with clostridium species can be achieved with crude
glycerol after the simple pretreatment.