Optimal conditions for enhancing sodium dodecyl sulfate biodegradation by Pseudomonas aeruginosa KGS

The anionic surfactant sodium dodecyl sulfate (SDS) was degraded by novel strain of Pseudomonas aeruginosa KGS under accession No. JQ328193, which was isolated from car wash wastewater. The purpose of this research was to study different optimization conditions required for enhancing the biodegradation of sodium dodecyl sulfate P. aeruginosa KGS. Influence of different Physicochemical factors such as nitrogen and carbon sources, pH, temperature, inoculation percent and different concentrations of SDS on the biodegradation of SDS were investigated by measuring the degradation rate of SDS using methylene blue active substance (MBAS) method. The optimum conditions determined for the this selected bacterium strain for degradation of SDS were 1.5mM SDS, inoculation percent 7%, pH 7.5, temperature 37°C, ammonium nitrate (nitrogen source) when basal salt medium was supplemented with glucose as a co substrate. This bacterium is able to degrade about 98% of the SDS after 24h of incubation under optimized conditions of biodegradation. The results presented in this research indicate that Pseudomonas aeruginosa is a suitable candidate for SDS biodegradation.