Aerobic degradation of diethyl phthalate by Sphingomonas sp.
An aerobic diethyl phthalate (DEP) degrading bacterium, DEP-AD1, was isolated from activated sludge. Based on its 16S rDNA sequence, this isolate was identified belonging to Sphingomonas genus with 99% similarity to Sphingomonas sp. strain C28242 and 98% similarity to S. capsulate. The specific degradation rate of DEP was concentration dependent with a maximum of 14 mg-DEP/(Lh). Results of degradation tests showed that DEP-AD1 could also degrade monoethyl phthalate (MEP), dimethyl phthalate (DMP), dibutyl phthalate (DBP), and diethylhexyl phthalate (DEHP), but not phthalate and benzoate.
Environmental Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Pokfulam Road, Hong Kong SAR, China. hrechef@hkucc.hku.hk
Herbert H P
HH
Fang
Dawei
D
Liang
Tong
T
Zhang
D000332:Aerobiosis; D019149:Bioreactors; D010795:Phthalic Acids / Q000378:metabolism*; D010802:Phylogeny; D012722:Sewage; D020578:Sphingomonas / Q000145:classification / Q000235:genetics / Q000378:metabolism*
D010795:Phthalic Acids; D012722:Sewage; C007379:diethyl phthalate