Edible oil degradation by using yeast coculture of Rhodotorula pacifica ST3411 and Cryptococcus laurentii ST3412

Applied Microbiology and Biotechnology
Daisuke Sugimori

Abstract

To develop a microbial treatment of edible oil-contaminated wastewater, microorganisms capable of rapidly degrading edible oil were screened. The screening study yielded a yeast coculture comprising Rhodotorula pacifica strain ST3411 and Cryptococcus laurentii strain ST3412. The coculture was able to degrade efficiently even at low contents of nitrogen ([NH(4)-N]=240 mg/L) and phosphorus sources ([PO(4)-P]=90 mg/L). The 24-h degradation rate of 3,000 ppm mixed oils (salad oil/lard/beef tallow, 1:1 w/w) at 20 degrees C was 39.8%+/-9.9% (means+/-standard deviations of eight replicates). The highest degradation rate was observed at 20 degrees C and pH 8. In a scaled-up experiment, the salad oil was rapidly degraded by the coculture from 671+/-52.0 to 143+/-96.7 ppm in 24 h, and the degradation rate was 79.4%+/-13.8% (means+/-standard deviations of three replicates). In addition, a repetitive degradation was observed with the cell growth by only pH adjustment without addition of the cells.

References

Sep 13, 2002·Bioscience, Biotechnology, and Biochemistry·Daisuke SugimoriYuma Mihara
May 16, 2007·Journal of Bioscience and Bioengineering·Yoshiki MatsumiyaMotoki Kubo

❮ Previous
Next ❯

Related Concepts

Related Feeds

Bioremediation (ASM)

Bioremediation is the treatment and removal of harmful pollutants or contaminants through the use of microorganisms. Discover the latest research here.