Biodegradation of dodecylbenzene solfonate sodium by Stenotrophomonas maltophilia Biofilm

Immobilization for microbial cultures has proved to be advantageous in municipal and industrial sewage treatment because of high degradation efficiency and good operational stability. In this survey, a bacterial strain was isolated from activated sludge that utilized branched anionic surfactants (BAS) as a sole carbon source. Identification of isolated strain was from 16S rRNA sequencing method. The immobilized cells on silanized glass beads as support and unmodified surfaces were used for removal of BAS; both types showed effective biodegrading of BAS. The removal rate in silanized surface was about 2 fold of unmodified surface. The result of biodegradation was studied by HPLC method and scanning electron microscope