Isolation of Dimethyl Sulfone-Degrading Microorganisms and Application to Odorless Degradation of Dimethyl Sulfoxide

摘要

With the objective of developing an odorless biodegradation process for dimethyl sulfoxide (DMSO),Hyphomicrobium sp.WU-OM3 was isolated.During the cultivation of strain WU-OM3 cells with 20 mM dimethyl sulfone (DMSO_2) as the sole carbon source,DMSO_2 was completely consumed within 48 h and sulfate ion accumulated in the culture broth.Methanesulfonate was also detected as an intermediate of DMSO_2 degradation.By combining the DMSO-oxidizing microorganism and strain WU-OM3 cells,0.64 mM (50 mg/l) DMSO was degraded to sulfate ion with 80% molar conversion ratio.